Provided is a reduced iron production method that can efficiently produce reduced iron without preheating raw materials. The reduced iron production method includes charging an agglomerate, which is a raw material of reduced iron, into a reducing furnace while introducing a reducing gas, which contains hydrogen as a main component, into the reducing furnace, and reducing iron oxide contained in the agglomerate by the reducing gas to obtain reduced iron, where the agglomerate to be charged into the reducing furnace is an agglomerate that retains heat obtained during its production, and the heat is used in a reduction reaction of the iron oxide.
RAW MATERIAL PARTICLES FOR PRODUCTION OF AGGLOMERATE, METHOD FOR PRODUCING RAW MATERIAL PARTICLES FOR PRODUCTION OF AGGLOMERATE, AGGLOMERATE, METHOD FOR PRODUCING AGGLOMERATE, AND METHOD FOR PRODUCING REDUCED IRON
Provided is a raw material particle for production of agglomerate that can be used to produce an agglomerate with better reducing performance than conventional agglomerates. The raw material particle 1(2) of the present disclosure is a raw material particle for producing an agglomerate as a raw material for producing reduced iron, including a central part 11(21), and a peripheral part 12(22) that covers the periphery of the central part 11(21). The central part 11 has a metal iron-containing substance, the central part 12 has a volatile substance, and the peripheral part 12(22) has iron oxide.
Provided are a high-strength duplex stainless steel pipe having an excellent wear resistance or dent resistance on the inner and outer surfaces of a steel pipe, and a method for manufacturing the same. The present invention has a component composition containing, by mass, 0.005 to 0.150% of C, 1.0% or less of Si, 10.0% or less of Mn, 11.5 to 35.0% of Cr, 0.5 to 15.0% of Ni, 0.5 to 6.0% of Mo, and less than 0.400% of N, with the remainder made up by Fe and unavoidable impurities, and has a steel structure having a ferrite phase and an austenite phase. The pipe axial direction tensile yield strength is 689 MPa or above, and the present invention has, on the steel pipe outer surface and the steel pipe inner surface, an oxide layer having a thickness of 1.0 µm or above.
C21D 7/10 - Modification des propriétés physiques du fer ou de l'acier par déformation par travail à froid sur toute la section droite, p.ex. des tiges d'armature pour béton
C21D 9/08 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour corps tubulaires ou tuyaux
C22C 38/58 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
4.
PLASMA TREATMENT METHOD, METHOD OF PRODUCING PLASMA-TREATED HEXAGONAL BORON NITRIDE POWDER, AND PLASMA TREATMENT DEVICE
Provided is a hexagonal boron nitride powder capable of achieving higher thermal conductivity when added to a resin as a filler. A plasma treatment method for plasma-treating a hexagonal boron nitride powder under reduced pressure, said method comprising: housing the hexagonal boron nitride powder in a treatment vessel; while supplying a plasma-generating gas into the treatment vessel, maintaining the inside of the treatment vessel at a pressure lower than the atmospheric pressure; and while rotating the treatment vessel with the central axis of the treatment vessel as the rotation axis, applying a high frequency to an electrode disposed outside the treatment vessel to thereby plasma-treat the hexagonal boron nitride powder in the treatment vessel. The rotation axis of the treatment vessel is inclined to the horizontal direction, and the treatment vessel and/or the electrode are cooled during the plasma treatment.
C01B 21/064 - Composés binaires de l'azote avec les métaux, le silicium ou le bore avec le bore
C04B 35/5833 - Produits céramiques mis en forme, caractérisés par leur composition; Compositions céramiques; Traitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base de non oxydes à base de borures, nitrures ou siliciures à base de nitrure de bore à base de nitrure de bore hexagonal
H05H 1/46 - Production du plasma utilisant des champs électromagnétiques appliqués, p.ex. de l'énergie à haute fréquence ou sous forme de micro-ondes
5.
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREFOR
Provided is a grain-oriented electrical steel sheet that takes advantage of a core loss reduction effect due to formation of grooves and that can effectively inhibit a reduction in magnetic flux density. This grain-oriented electrical steel sheet has predetermined linear grooves. In each of the linear grooves, the proportion of a flat part as defined in a predetermined manner is 30-90% with respect to the entire length of the linear groove, the number of portions where the flat part is continuous over a predetermined length is at least 10 per surface area of 100 cm2, and the ratio of the ten-point average roughness Rzjis with respect to the average depth D is 0.1-1.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
H01F 1/147 - Alliages caractérisés par leur composition
6.
POSITION DETECTION APPARATUS FOR SEAM PORTION AND HEATING PORTION OF WELDED STEEL PIPE, MANUFACTURING EQUIPMENT FOR WELDED STEEL PIPE, POSITION DETECTION METHOD FOR SEAM PORTION AND HEATING PORTION OF WELDED STEEL PIPE, MANUFACTURING METHOD FOR WELDED STEEL PIPE, AND QUALITY CONTROL METHOD FOR WELDED STEEL PIP
A position detection apparatus for a seam portion and a heating portion of a welded steel pipe is a position detection apparatus configured to detect a position of the seam portion of the welded steel pipe and a position of the heating portion, the position detection apparatus including a light source configured to irradiate the seam portion and the heating portion with light in a first wavelength range, an imaging unit configured to capture an image of each of the seam portion and the heating portion irradiated with the light by the light source, and an image processing unit configured to process the image captured by the imaging unit and to detect the position of each of the seam portion and the heating portion, in which the imaging unit includes a first channel capable of receiving the light in the first wavelength range, and a second channel capable of receiving light in a second wavelength range corresponding to radiation light from the heating portion.
B21C 37/08 - Fabrication de tubes à joints soudés ou brasés
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
G01B 11/00 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques
7.
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREFOR
Provided is a grain-oriented electromagnetic steel sheet on which magnetic domain refinement treatment has been performed using laser irradiation and from which excellent noise reduction performance and low core loss properties can be obtained when being assembled into an actual machine transformer. In a grain-oriented electromagnetic steel sheet according to the present invention, the magnetic flux density B8 is set to at least 1.92 T, the ratio (Wa/Wb) between the film thickness Wa of a forsterite coating film on a strain-introduced surface and the film thickness Wb of a forsterite coating film on a non-strain-introduced surface is set to at least 0.5, the average width of magnetic domain discontinuous parts on the non-strain-introduced surface is set to at least 1.00 times the average width of magnetic domain discontinuous parts on the strain-introduced surface, the average width of magnetic domain discontinuous parts on the non-strain-introduced surface is set to at most 400 ?m, and compressive stress is present in the rolling direction in a range of at least 2 ?m, in the sheet thickness direction, from the steel sheet surface that is the strain-introduced surface.
B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage
B23K 26/356 - Travail par rayon laser, p.ex. soudage, découpage ou perçage pour le traitement de surface par traitement par choc
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
Provided is a method for producing a fine water-atomized metal powder that has a high amorphization rate, a high apparent density, and a high roundness even in the case where the contained amount of iron-based components is great. This method for producing a water-atomized metal powder by jetting cooled water so as to collide with a molten metal flow falling down vertically and to segment the molten metal flow into a metal powder, the method comprising a step for jetting cooled water from at least three cooled water outlets disposed at a distance from the falling molten metal flow, at a spread angle in the range of 5-30° and at a jetting pressure of at least 10 MPa. The cooled water has a droplet diameter of at most 100 µm and a convergence angle of 5-10°, and provides a water/molten steel ratio of at least 50.
B22F 9/08 - Fabrication des poudres métalliques ou de leurs suspensions; Appareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau liquide par coulée, p.ex. à travers de petits orifices ou dans l'eau, par atomisation ou pulvérisation
Provided is a wound core in which a non-heat-resistant magnetic domain refined material is used for at least a part of materials forming the wound core and which has a better iron loss reducing effect.The wound core has a flat portion and corner portions adjacent to the flat portion, the flat portion including a lap portion, the corner portions including bent portions. A non-heat-resistant magnetic domain refined material is used for at least a part of the materials forming the wound core. Closure domains are formed in the non-heat-resistant magnetic domain refined material so as to extend in a direction intersecting a longitudinal direction of the non-heat-resistant magnetic domain refined material, an area of each of the closure domains in a cross section that is taken in the longitudinal direction being more than 7500 ?m2. In the lap portion, the ratio of the number of lap joint portions having a lap length of from 3.0 mm to 30 mm to the total number of lap joint portions is 50% or more.
An objective of the present invention is to provide a grain-oriented electrical steel sheet having excellent insulating properties. The grain-oriented electrical steel sheet includes a steel sheet and coating films respectively provided on both sides of the steel sheet, wherein an interlayer current value after a friction test is 0.10 A or less. However, the friction test is performed by overlapping two grain-oriented electrical steel sheets and causing the two grain-oriented electrical steel sheets to reciprocate 90 times under the conditions of a surface pressure of 200 Pa, a friction speed of 0.10 m/sec, and a reciprocating stroke of 50 mm.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p.ex. revêtement par conversion, passivation des métaux
Provided are an electric resistance welded steel pipe and a method for manufacturing the same. The present invention is an electric resistance welded steel pipe having a base material section and a welded section, wherein: the steel structure in a central section of the base material section has a bcc phase of 80% or more by volume and has an average crystal grain size of 15.0 ?m or less; the A value represented by equation (1) is 0.55-0.85, inclusive; the yield ratio in the pipe axis direction is 90% or less, and the Charpy absorbed energy of the base material section at ?40°C is 100 J or more. 1: A=?/((??/2)1/2×b)
B21C 37/08 - Fabrication de tubes à joints soudés ou brasés
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
Provided is a screw joint in which the relationship between a shoulder angle and a screw taper angle is defined to be in a suitable condition for the purpose of avoiding excessive plastic deformation of shoulder surfaces and maintaining and improving performance of the screw joint. This screw joint includes: pins each having a male screw which is a male taper screw and which is provided to the outer circumferential surface of the tip of a first steel pipe; a coupling having female screws which are female taper screws, are configured to be engaged with male screws, and is provided to the inner circumferential surfaces at opposite ends of a second steel pipe. This screw joint is configured such that, when the male screws of the pins are engaged with the female screws at the opposite ends of the coupling, the shoulder surfaces of the tips of the pins come into contact with each other. The relationship between the shoulder angle parameter and the screw taper angle parameter for the coupling and two pins inserted from the opposite ends of the coupling is defined by expression (1), and the screw joint is fastened with a fastening torque which is 60-85% of a yield torque calculated by expression (2). Expression (1): -1.5°=??-??=2.0°
To provide a grain-oriented electrical steel sheet that can achieve both sufficiently low transformer core loss and sufficiently low noise. Disclosed is a grain-oriented electrical steel sheet having a tension coating on a surface thereof and subjected to magnetic domain refining treatment by generating linear closure domains extending in a direction within 30% of a transverse direction, in which an average interval L between adjacent closure domains is 15 mm or less, a depth ratio rd of a depth of the closure domains to a sheet thickness, calculated by a predetermined formula, is 35 % or more, and a volume fraction rv of the closure domains, calculated by a predetermined formula, is 0.30 % or more and 3.0 % or less, and an area ratio rs of the closure domains, calculated by a predetermined formula, is 0.50 % or more and 4.0 % or less.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
H01F 1/147 - Alliages caractérisés par leur composition
14.
METHOD FOR EVALUATING THERMOPLASTICITY OF COAL OR CAKING ADDITIVE
A method for evaluating the thermoplasticity of a coal or a caking additive with an apparatus including a container for coal and a stirrer located in the container, including: estimating a permeation distance of the coal or caking additive from a value indicating a shape of semicoke formed by rotating the stirrer while heating the coal or caking additive and from a correlation between the value indicating the shape of the semicoke and the permeation distance of the coal or caking additive.
G01N 11/14 - Recherche des propriétés d'écoulement des matériaux, p.ex. la viscosité, la plasticité; Analyse des matériaux en déterminant les propriétés d'écoulement en déplaçant un corps à l'intérieur du matériau en utilisant des corps en rotation, p.ex. moulinet
A method for preparing a coal, which is used alone or in combination with another coal or other coals, or a caking additive as a raw material for coke production, including: before the coal or caking additive is delivered to a coke plant, adjusting a grain size such that the amount of grains with a grain size of 6 mm or more in the coal or caking additive satisfying at least one of a degree of entanglement, (a - b)/a, of 0.20 or more and a height, a, of 30 mm or more is 30% or less by mass, wherein a denotes a height of semicoke adhering to a stirrer, the semicoke being formed by heating the coal or caking additive in a container while rotating the stirrer, and b denotes a height of the semicoke on an inner wall of the container.
C10B 57/04 - Autres procédés de carbonisation ou de cokéfaction; Caractéristiques générales des procédés de distillation destructive utilisant des charges de composition spéciale
G01N 11/14 - Recherche des propriétés d'écoulement des matériaux, p.ex. la viscosité, la plasticité; Analyse des matériaux en déterminant les propriétés d'écoulement en déplaçant un corps à l'intérieur du matériau en utilisant des corps en rotation, p.ex. moulinet
16.
RAIL HAVING EXCELLENT FATIGUE CRACK PROPAGATION RESISTANCE CHARACTERISTICS, AND METHOD FOR PRODUCING SAME
Provided are a rail that exhibits an excellent fatigue damage resistance and in particular excellent fatigue crack propagation resistance characteristics, and a preferred method for producing the rail. The rail has a component composition that contains, on a mass basis, C : 0.80-1.30%, Si : 0.10-1.20%, Mn : 0.20-1.80%, P = 0.035%, S : 0.0005-0.012%, and Cr : 0.20-2.50%, with the balance being Fe and inevitable impurities, and has not more than 2500 for CP = X/RA (wherein X = {(10 x [%C]) + ([%Si]/12) + ([%Mn]/24) + ([%Cr]/21)}5, [%Y] is the content (mass%) of element Y, and RA is the prior austenite grain diameter (µm)). In the rail production method, a steel material is heated to not more than 1350°C and then hot rolled so as to provide a finishing temperature of at least 900°C.
Provided are: a mechanical property measuring apparatus and method that can accurately measure a mechanical property through physical quantities; a substance manufacturing equipment and method that can improve theproduction yield rate. A mechanical property measuring apparatus (100) comprises: a physical quantity measuring unit (5) configured to measure a plurality of physical quantities of a measured object that includes a substanceand a film on a surface of the substance; a classification processing unit (81) configured to select one of a plurality of calculation models (M1, M2, ..., Mn) for calculating a mechanical property of the substance, based on at least twoof the plurality of physical quantities measured; and a mechanical property calculating unit (82) configured to calculate the mechanical property of the substance using the calculation model selected by the classification processing unit (81) and the at least two of the plurality of physical quantities.
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
G01N 27/80 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la dureté mécanique, p.ex. en recherchant la saturation ou la rémanence d'un matériau ferromagnétique
Provided are: a mechanical property measuring apparatus and method that can accurately measure a mechanical property through physical quantities; a substance manufacturing equipment and method that can improve the production yield rate and high-quality substance. A mechanical property measuring apparatus (100) comprises: a physical quantity measuring unit (5) configured to measure a plurality of physical quantities of a measured object that includes a substance and a film on a surface of the substance; a mechanical property calculating unit (82) configured to calculate, using a plurality of calculation models each for calculating a mechanical property of the substance and at least two of the plurality of physical quantities measured, the mechanical property of the substance for each of the plurality of calculation models; and a selection processing unit (81) configured to select one mechanical property based on the at least two of the plurality of physical quantities.
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
G01N 27/80 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la dureté mécanique, p.ex. en recherchant la saturation ou la rémanence d'un matériau ferromagnétique
Provided are a mechanical property measuring apparatus and method that can accurately measure a mechanical property through physical quantities, etc. A mechanical property measuring apparatus (100) comprises: a physical quantity measuring unit (5) configured to measure a plurality of physical quantities of a measured object that includes a substance and a film on a surface of the substance; a calculation model generating unit (81) configured to select a plurality of pieces of learning data and generate a calculation model for calculating a mechanical property of the substance; and a mechanical property calculating unit (82) configured to calculate the mechanical property of the substance using the calculation model generated and at least two of the plurality of physical quantities, wherein the selection physical quantities include at least one physical quantity measured using a first measurement signal and at least one physical quantity measured using a second measurement signal.
G01N 27/80 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la dureté mécanique, p.ex. en recherchant la saturation ou la rémanence d'un matériau ferromagnétique
Provided is a linear groove formation pattern by which both a building factor reduction effect and a high magnetic flux density are achieved. This grain-oriented electromagnetic steel sheet has, on a surface thereof, multiple linear grooves extending in a transverse direction to the rolling direction of the steel sheet, wherein: concave defects recessed from the surface are formed on a surface portion of the steel sheet located between the linear grooves, with the volume fraction of the steel sheet resulting from the concave defects to the volume fraction of the steel sheet without the concave defects being 0.0025 vol% to 0.01 vol%; and groove discontinuity parts disrupting the stretch of the linear grooves are formed at a frequency of 30-200 discontinuity parts per 1 m2 of the steel sheet.
H01F 1/147 - Alliages caractérisés par leur composition
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
21.
HARDNESS PREDICTION METHOD OF HEAT HARDENED RAIL, THERMAL TREATMENT METHOD, HARDNESS PREDICTION DEVICE, THERMAL TREATMENT DEVICE, MANUFACTURING METHOD, MANUFACTURING FACILITIES, AND GENERATING METHOD OF HARDNESS PREDICTION MODEL
Thermal treatment of rails having a stable hardness distribution is enabled. The hardness of a rail, obtained by forced-cooling of a rail in the austenite region temperature or higher in a cooling facility (7) is predicted. A plurality of sets of learning data made up of a cooling conditions dataset and output data of hardness was acquired, using a model performing computation with the cooling conditions dataset having at least surface temperature of the rail before starting cooling and the operating conditions of the cooling facility (7) as input data, and the internal hardness of the rail after forced cooling as output data. A hardness prediction model is generated in advance by machine learning using the obtained plurality of sets of learning data, in which the cooling conditions dataset is input data at least, and information relating to internal hardness of the rail after forced cooling is output data. Hardness of the rail is predicted from the internal hardness of the rail as to one set of cooling conditions dataset set as cooling conditions of forced cooling, using the hardness prediction model.
Provided is a grain-oriented electrical steel sheet which has been subjected to heat-resistant magnetic domain refining treatment and can effectively suppress carburizing and nitriding during stress relief annealing. The grain-oriented electrical steel sheet has a plurality of grooves on one side that extend linearly across the rolling direction and are lined up at intervals in the rolling direction, and has at least a forsterite film on a surface of the steel sheet, where an average thickness of the forsterite film formed on the floor of the grooves is 0.45 µm or more, and a standard deviation ? of the thickness is 0.34 µm or less.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p.ex. revêtement par conversion, passivation des métaux
H01F 1/147 - Alliages caractérisés par leur composition
23.
STEELMAKING LINE AND METHOD OF PRODUCING REDUCED IRON
Provided is an iron manufacturing facility which, when reduced iron is to be manufactured from iron oxide, contributes to the achievement of a method that enables energy conservation and a reduction in the amount of CO2 emissions. The iron manufacturing facility comprises: a blast furnace that reduces iron oxide; a reduction furnace that reduces iron oxide; a methane synthesis device that synthesizes methane from blast furnace gas including hydrogen, carbon monoxide, and carbon dioxide produced as byproducts from the blast furnace and/or furnace top gas including hydrogen, carbon monoxide, and carbon dioxide emitted from the furnace top of the reduction furnace, and hydrogen gas; a blowing device that blows the methane gas synthesized by the methane synthesis device into the blast furnace; a heating reformer that heats or heats and reforms the blast furnace gas and/or the furnace top gas and the methane gas synthesized by the methane synthesis device, and forms a reducing gas containing carbon monoxide gas and hydrogen gas; a reducing gas blowing device that blows the reducing gas into the reduction furnace; and a supply path through which the furnace top gas is supplied to the methane synthesis device and/or the heating reformer.
Provided is a laser machining method that causes no degradation in magnetic properties for thin electrical steel sheets. An electrical steel sheet machining method comprises machining an electrical steel sheet to a predetermined shape by melt-cutting the electrical steel sheet using a laser, wherein a scanning rate of the laser in the melt-cutting is 10000 mm/min or more.
B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage
B23K 26/38 - Enlèvement de matière par perçage ou découpage
H02K 15/02 - Procédés ou appareils spécialement adaptés à la fabrication, l'assemblage, l'entretien ou la réparation des machines dynamo-électriques des corps statoriques ou rotoriques
25.
ELECTRIC RESISTANCE WELDED STEEL PIPE AND METHOD FOR PRODUCING THE SAME
Provided are: an electroseamed steel pipe having high strength and excellent toughness and buckling resistance; and a method for manufacturing same. The electroseamed steel pipe has a base metal part and an electroseamed welded part, wherein: the base metal part has a component composition containing predetermined amounts of C, Si, Mn, P, S, Al, N, Nb, V, and Ti, in mass%, respectively, with the balance being Fe and unavoidable impurities; and a steel structure in the thick-walled central portion of the base metal has at least 70% in total of ferrite and bainite in terms of volume fraction, with the balance comprising at least one or two selected from among pearlite, martensite, and austenite, has an average crystal grain size of 7.0 µm or less, has a dislocation density of 1.0×1014-6.0×1015m-2, and has a magnitude of residual stress in the pipe axial direction on the inner and outer surfaces of the pipe of 150 MPa or less.
B21C 37/08 - Fabrication de tubes à joints soudés ou brasés
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C21D 9/08 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour corps tubulaires ou tuyaux
C21D 9/50 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour joints de soudure
Provided is an iron-based soft magnetic powder for dust cores that enables production of a dust core having high density and low iron loss. An iron-based soft magnetic powder for dust cores comprises: an iron-based soft magnetic powder; a condensed aluminum phosphate layer on particle surfaces of the iron-based soft magnetic powder; and a silicone resin layer on a surface of the condensed aluminum phosphate layer, wherein the condensed aluminum phosphate layer is a continuous coating, and a total mass of the condensed aluminum phosphate layer and the silicone resin layer is 0.60 mass? or less with respect to 100 mass? of a total mass of the iron-based soft magnetic powder, the condensed aluminum phosphate layer, and the silicone resin layer.
H01F 1/24 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriés; Emploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques doux métaux ou alliages sous forme de particules, p.ex. de poudre comprimées, frittées ou agglomérées les particules étant isolées
27.
ELECTRIC RESISTANCE WELDED STEEL PIPE, METHOD FOR MANUFACTURING THE SAME, AND AUTOMOTIVE STRUCTURAL MEMBER
Provided is an electric resistance welded steel pipe having excellent workability and torsion fatigue resistance and a method for producing same. An electric resistance welded steel pipe 1 comprises a seam region 3, which is a region from an electric resistance weld seam portion 2 formed in the lengthwise direction of the pipe to ±10 degrees in the circumferential direction of the pipe, and a base material region 6, which is a region other than the seam region 3, wherein the r value in the lengthwise direction of the pipe is 1.0 or greater, H (mm) (which is the difference (Tb(Ave) Ts(MIN)) between the minimum value Ts(MIN) (mm) of the thickness of the seam region 3 and the average value Tb(Ave) (mm) of the thickness of the base material region 6) and the arc length W (mm) of the pipe inner surface of the seam region 3 satisfy equation (1), and the maximum value Ts(MAX) (mm) of the thickness of the seam region 3 and Tb(Ave) (mm) satisfy equation (2). (1): H/W=0.10 (2): TS(MAX)/Tb(Ave)=1.05
B21C 37/08 - Fabrication de tubes à joints soudés ou brasés
B21C 37/30 - Finition des tubes, p.ex. calibrage, polissage
B21D 5/12 - Cintrage des tôles le long de lignes droites, p.ex. pour former un pli simple par un procédé d'étirage dans lequel les pièces à travailler sont mises en forme par passage entre des matrices ou des rouleaux, p.ex. fabrication de profilés pour fabriquer des tubes utilisant des rouleaux de formage
An object is to provide a resin-coated metal sheet for containers, on which wrinkle defects are not generated during a post-process heat treatment in can making of two-piece cans that involves a high degree of processing.A resin-coated metal sheet for containers includes a metal sheet and a resin coating layer on each of surfaces of the metal sheet, in which the resin coating layer on at least one surface contains a resin material that contains 90 mol% or more of an ethylene terephthalate unit and that has a mobile amorphous content of 80% or more.
B32B 15/09 - Produits stratifiés composés essentiellement de métal comprenant un métal comme seul composant ou comme composant principal d'une couche adjacente à une autre couche d'une substance spécifique de résine synthétique comprenant des polyesters
B65D 25/36 - Habillage ou revêtements externes formés par application d'un matériau en feuille
29.
METHOD FOR PRODUCING COAL BLEND AND METHOD FOR PRODUCING COKE
Provided are a method for producing a blended coal, said method enabling the production of a blended coal from which a coke having high strength is obtained after dry distillation, and a method for producing a coke.?This method, which is for producing a blended coal by blending a plurality of brands of coals, comprises: by referring the surface tension of coal having an inertinite structure content of 100% by volume to as ?100 and referring the surface tension of coal having a softened and melted structure content of 100% by volume to as ?0, determining the range of ?0 of coal; among the brands of coals 1, 2, - -, i, - - n to be blended in the blended coal, specifying coal i the ?100 of which is out of the range of ?0; then measuring TI of coal i; and setting the blending ratio of coal i so as to give w, which is calculated in accordance with formula (1), of 20.4 % by mass or less.?(1): w=?(xi x TIi) In formula (1); xi represents the blending ratio (% by mass) of coal i; TIi represents the ratio (% by volume) of the inertinite structure contained in coal i; and w represents the ratio by mass (% by mass) of the inertinite structure being out of the range of ?0 of coal in the blended coal.
C10B 57/04 - Autres procédés de carbonisation ou de cokéfaction; Caractéristiques générales des procédés de distillation destructive utilisant des charges de composition spéciale
30.
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD OF MANUFACTURING SAME
Provided is a grain-oriented electrical steel sheet having both low iron loss and good magnetostrictive properties, with which a transformer having excellent properties can be manufactured. The grain-oriented electrical steel sheet of the present disclosure has a linear strain region extending linearly in a direction intersecting the rolling direction, where the linear strain region has a region having compressive stress in the rolling direction, and a region adjacent in a rolling direction to the region having compressive stress has a region having tensile stress in the rolling direction.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
H01F 1/147 - Alliages caractérisés par leur composition
H01F 27/245 - Noyaux magnétiques fabriqués à partir de tôles, p.ex. à grains orientés
31.
METHOD OF OPERATING BLAST FURNACE AND BLAST FURNACE ANCILLARY FACILITY
Provided is a method of operating a blast furnace, including generating a regenerative methane gas using a blast furnace by-product gas, and blowing a blast gas and a reducing agent into the blast furnace from a tuyere, in which the blast gas is oxygen gas, the regenerative methane gas is used as at least part of the reducing agent, and the oxygen gas and/or the regenerative methane gas is preheated before being blown into the blast furnace from the tuyere.
An electric resistance welded steel pipe, and a method for manufacturing the same are provided. An electric resistance welded steel pipe of the present invention has a welded portion that includes a heat-affected zone having a steel microstructure principally including a bainitic ferrite phase and/or a bainite phase. The steel microstructure at half the wall thickness of the heat-affected zone of the welded portion includes a bainitic ferrite phase and/or a bainite phase in a total area ratio of 90% or more relative to the entire microstructure at half the wall thickness of the heat-affected zone of the welded portion. In the steel microstructure located 1 mm in the wall thickness direction below the outer surface of the heat-affected zone of the welded portion, the bainitic ferrite phase and/or the bainite phase has an average grain size of 20 ?m or less. The average grain size of the bainitic ferrite phase and/or the bainite phase located 1 mm in the wall thickness direction below the outer surface of the heat-affected zone of the welded portion is 0.5 times or more and 2 times or less the average grain size of the bainitic ferrite phase and/or the bainite phase at half the wall thickness of the heat-affected zone of the welded portion.
B21C 37/08 - Fabrication de tubes à joints soudés ou brasés
B21C 37/30 - Finition des tubes, p.ex. calibrage, polissage
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C21D 9/08 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour corps tubulaires ou tuyaux
C21D 9/50 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour joints de soudure
According to one aspect of the present invention, provided is a blast furnace operation method characterized in that a high-concentration hydrogen-containing gas which contains at least 80 mol% of hydrogen gas, is blown from a tuyere under certain conditions such as: a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is room temperature to 300 °C, and the blown amount of hydrogen gas in the high-concentration hydrogen-containing gas is 200 Nm3/t to 500 Nm3/t; a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is 300 °C to 600 °C, and the blown amount of hydrogen gas in the high-concentration hydrogen-containing gas is at least 145 Nm3/t; or a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is 600 °C to 900 °C, and the blown amount of the high-concentration hydrogen-containing gas is at least 125 Nm3/t.
Provided is a method of operating a blast furnace, having generating a regenerative methane gas from a by-product gas discharged from the blast furnace, and blowing a blast gas and a reducing agent into the blast furnace from a tuyere of the blast furnace in which the blast gas is oxygen gas and the regenerative methane gas is used as at least part of the reducing agent.
HOT-ROLLED STEEL SHEET FOR ELECTRIC RESISTANCE WELDED STEEL PIPE AND METHOD FOR MANUFACTURING THE SAME, ELECTRIC RESISTANCE WELDED STEEL PIPE AND METHOD FOR MANUFACTURING THE SAME, LINE PIPE, AND BUILDING STRUCTURE
Provided are a hot-rolled steel sheet for an electric resistance welded steel pipe and a method for manufacturing the hot-rolled steel sheet, an electric resistance welded steel pipe and a method for manufacturing the electric resistance welded steel pipe, a line pipe, and a building structure. The hot-rolled steel sheet for an electric resistance welded steel pipe according to the present invention has a chemical composition containing, by mass%, C: 0.030% or more and 0.20% or less, Si: 0.02% or more and 1.0% or less, Mn: 0.40% or more and 3.0% or less, P: 0.050% or less, S: 0.020% or less, N: 0.0070% or more and 0.10% or less, and Al: 0.005% or more and 0.080% or less, the balance being Fe and incidental impurities, in which N dissolved in a steel is contained in an amount of 0.0010% or more and 0.090% or less, and letting a sheet thickness be t, a steel microstructure at a 1/2t position has an average grain size of 20.0 ?m or less.
B21B 1/22 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilés; Séquence des opérations dans les trains de laminoirs; Installation d'une usine de laminage, p.ex. groupement de cages; Succession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies
B21C 37/08 - Fabrication de tubes à joints soudés ou brasés
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
The present invention is a hydrogen supply system that uses a hydrogen transport curdle 4 to supply hydrogen to a fuel cell vehicle, and comprises: a filling means that is provided to a hydrogen filling facility and fills the curdle 4 with hydrogen; a management means that calculates the transport timing for transporting the hydrogen-filled curdle 4 to a business that operates fuel cell vehicles; a transport means that transports the hydrogen-filled curdle 4 to the business in accordance with the transport timing; and a positioning means that positions the hydrogen-filled curdle 4 that was transported to the business in a location inside the business, the location being accessible to a fuel cell vehicle and being such that hydrogen can be replenished.
F17C 13/00 - RÉCIPIENTS POUR CONTENIR OU EMMAGASINER DES GAZ COMPRIMÉS, LIQUÉFIÉS OU SOLIDIFIÉS; GAZOMÈTRES À CAPACITÉ FIXE; REMPLISSAGE OU VIDAGE DE RÉCIPIENTS DE GAZ COMPRIMÉS, LIQUÉFIÉS OU SOLIDIFIÉS - Détails des récipients ou bien du remplissage ou du vidage des récipients
An electrical steel sheet with a vitreous insulating film and containing a crystalline fibrous material having an aspect ratio of 1.5 or more on a surface of the steel sheet. The content of the crystalline fibrous material is 1.0 mass% or more and 50 mass% or less.in which a ratio (Lrd/Ltd) of a length in a rolling direction (Lrd) of the crystalline fibrous material in a cross section in the rolling direction of the insulating film to a length in a direction perpendicular to the rolling direction (Ltd) of the crystalline fibrous material in a cross section in the direction perpendicular to the rolling direction of the insulating film is 1.5 or more and 50.0 or less. This electrical steel sheet provides higher tension in the rolling direction than in a direction perpendicular to the rolling direction and is excellent in terms of film adhesion properties.
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p.ex. revêtement par conversion, passivation des métaux
38.
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING SAME
In a production of a grain-oriented electrical steel sheet comprising hot rolling a raw steel material containing Si: 2.5 to 4.5 mass%, cold rolling, decarburization annealing, applying an annealing separator composed mainly of MgO, finish annealing and magnetic domain subdividing, the annealing separator to be used includes compounds of Sn, Sb, Mo and W by 0.3 to 5 mass% as converted to a metal, and the finish annealing is conducted by holding the steel sheet at a temperature of 800 to 950°C for 10 to 100 hours under an inert atmosphere and passing a dry gas containing not less than 1 vol% of H2 and having a dew point of not higher than 10°C so as to reach a furnace pressure of not less than 3.5 mmH2O from not lower than 1050°C to a purification treatment temperature, so that a pickling weight loss of undercoat film by pickling with HCl is not more than 1.8 g/m2 and the total concentration of Sn, Sb, Mo, and W on a boundary face between the film and iron matrix is 0.01 to 0.15 mass%, whereby a grain-oriented electrical steel sheet having an excellent film adhesiveness is obtained even when the magnetic domain subdividing treatment is performed at a high energy density.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
H01F 1/147 - Alliages caractérisés par leur composition
39.
METHOD FOR ESTIMATING SURFACE TENSION OF COAL AND METHOD FOR PRODUCING COKE
Provided is a method for easily estimating the surface tension of coal.A method for estimating a surface tension of coal includes: subjecting a surface tension, a physical property value representing a coal rank, and a total inert content of each of different brands of coal to multiple regression analysis to determine in advance a regression equation including the surface tension of coal as an objective variable and the physical property value and the total inert content as explanatory variables; and measuring the physical property value and the total inert content of a coal of which the surface tension is to be estimated, and calculating the surface tension of the coal by using the measured physical property value and the measured total inert content, and the regression equation.
G01N 13/02 - Recherche de la tension superficielle des liquides
C10B 57/04 - Autres procédés de carbonisation ou de cokéfaction; Caractéristiques générales des procédés de distillation destructive utilisant des charges de composition spéciale
Provided is a method for easily estimating the surface tension of coal.A method for estimating a surface tension of coal includes: calculating a relational expression (second relational expression) representing the relationship between the surface tension and the total inert content of a coal from the surface tension of coal inerts estimated based on the coal rank and the surface tension of coal reactives; and measuring the total inert content of a coal of which the surface tension is to be estimated, and calculating the surface tension of the coal by using the measured total inert content and the relational expression.
G01N 13/02 - Recherche de la tension superficielle des liquides
C10B 57/04 - Autres procédés de carbonisation ou de cokéfaction; Caractéristiques générales des procédés de distillation destructive utilisant des charges de composition spéciale
Provided are an electric resistance welded steel pipe (ERWSP) including a base metal zone (BMZ) and electric resistance welded zone having high strength, excellent toughness, and excellent buckling resistance, a method for producing the ERWSP, a building structure, and a line pipe. The BMZ has a predetermined chemical composition and a steel microstructure including, by volume, ferrite: > 30%, and bainite: 10%. Total volume fraction of ferrite and bainite is 70% to 95%, the balance being one or more phases selected from pearlite, martensite, and austenite. When regions surrounded by boundaries between adjacent crystals having a misorientation of 15° are defined as crystal grains (CGs), the average CG size is < 7.0 pm, and the volume fraction of CGs 40.0 pm is 30%. A compressive residual stress generated in the inner and outer surfaces of the ERWSP in the axial direction is 250 MPa.
B23K 11/16 - Soudage par résistance tenant compte des propriétés du métal à souder
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
Provided is a boron nitride powder having excellent adhesion to a resin. The boron nitride powder has a hexagonal structure, has a carboxyl group present on a surface of the boron nitride powder, and has a molar ratio of carboxyl group to nitrogen atom of 0.001 or more on a surface of the boron nitride powder.
A rail 1 comprises a foot section 2, a web section 3, and a head section 4. The component composition of the web section 3 includes C: 0.70-1.20 wt%, Si: 0.20-1.20 wt%, Mn: 0.20-1.50 wt%, P: 0.035 wt% or less, and Cr: 0.20-2.50 wt%, with the remainder comprising Fe and unavoidable impurities. The area ratio of pearlite in the web section 3 is 95% or more, and the average size of the pearlite blocks is 60 µm or less.
Disclosed is a non-oriented electrical steel sheet having low iron loss in a frequency range of about 400 Hz. The non-oriented electrical steel sheet comprises an inner layer and surface layers, and has a chemical composition containing: Si; and C: 0.020 mass? or less, Mn: 0.010 mass? to 2.0 mass?, and S: 0.0100 mass? or less, as average contents in the total sheet thickness, with the balance being Fe and inevitable impurities, wherein each of the surface layers has an average Si content [Si]1 of 2.5 mass? to 7.0 mass?, the inner layer has an average Si content [Si]0 of 1.5 mass? to 5.0 mass?, each of the surface layers has an in-plane tensile stress of 5 MPa to 50 MPa, the non-oriented electrical steel sheet has a sheet thickness t of 0.01 mm to 0.35 mm, the surface layers have a total thickness t1 with a ratio t1/t of the total thickness t1 to the sheet thickness t being 0.10 to 0.70, the non-oriented electrical steel sheet has an average N content [N] in the total sheet thickness of 40 ppm or less, and an iron loss W10/400 in W/kg at a maximum magnetic flux density of 1.0 T and a frequency of 400 Hz and the sheet thickness t in mm satisfy the following formula (1):W10/400 ? 8 + 30t ... (1).
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
[Problem] To provide a wear-resistant steel sheet which exhibits high wear resistance at high temperatures from 300°C to 500°C, while having toughness at low temperatures at the same time. [Solution] A steel sheet which has a component composition that contains from 0.10% to 0.23% of C, from 0.05% to 1.00% of Si, from 0.10% to 2.00% of Mn, 0.050% or less of P, 0.050% or less of S, 0.050% or less of Al, from 0.05% to 5.00% of Cr, 0.0100% or less of N and 0.0100% or less of O, while satisfying 1.0 = 0.45Cr + Mo = 2.25, with the balance being made up of Fe and unavoidable impurities, and which has a structure wherein the volume fraction of martensite at the depth of 1 mm from the surface of the steel sheet is 95% or more. With respect to this steel sheet, the Vickers hardness at 400°C is 288 or more and the Brinell hardness at 25°C is from 360 to 490 HBW10/3000 at the depth of 1 mm from the surface of the steel sheet.
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
Provided is a grain-oriented electromagnetic steel sheet capable of obtaining excellent magnetic characteristics which are stable throughout the entire length of a coil. The grain-oriented electromagnetic steel sheet contains by mass%, 0.005% or less of C, 2.0-4.5% of Si, and 0.01-0.5% of Mn, contains by mass ppm, 20 ppm or less of N, less than 50 ppm of each of Se, Te, and O, less than 30 ppm of S, and less than 40 ppm of acid-soluble Al, and further contains less than 30 ppm of Ti in which acid-soluble Ti is included in an amount of 5-25 ppm, with the remainder comprising Fe and inevitable impurities, wherein the grain-oriented electromagnetic steel sheet has 0.05/mm2 or more of precipitates having a particle diameter of 200 nm or more and containing Ti and N.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
Provided is a method for forming a linear groove, for forming a linear groove in the surface of a grain-oriented electrical steel sheet or other steel sheet, said method having excellent magnetic flux density and iron loss reducing effect. A method for forming a linear groove, said method having: a resist formation step for forming a resist on the surface of a steel sheet; a laser irradiation step for performing laser scanning in which a laser is radiated while scanning in a direction intersecting with the rolling direction of the steel sheet, and the resist in a portion irradiated by the laser is thereby removed, the laser scanning being performed periodically in the rolling direction of the steel sheet; and an etching step, the resist being removed continuously in the plate width direction of the steel sheet by two or more lasers radiated respectively from two or more laser irradiation devices installed so as to be arranged in the plate width direction, and two lasers radiated respectively from two laser irradiation devices adjacent in the plate width direction being radiated so that the laser centers thereof are offset in a range of 0.05 F to 0.95 F in the direction orthogonal to the laser scanning direction, where F is the spot diameter of the lasers, in the laser irradiation step.
C25F 3/14 - Attaque de surface localisée, c. à d. gravure
B23K 26/361 - Enlèvement de matière pour l'ébarbage ou l'ébavurage mécanique
C25F 3/06 - Attaque de surface du fer ou de l'acier
H01F 1/147 - Alliages caractérisés par leur composition
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
48.
RESIN COATED METAL SHEET, CONTAINER, AND METHOD OF EVALUATION
A resin coated metal sheet according to the present invention has a metal sheet at least one face of which is coated with a resin layer. A movable amorphous amount of the resin layer measured by a temperature modulated differential scanning calorimeter is 30% or more and 46% or less. An intensity ratio I1,096/I1,119 between intensity (I1,096) of a peak attributable to a trans structure of methylene groups in polyethylene terephthalate (PET) around 1,096 cm-1 determined from laser Raman spectroscopic analysis measured by making a plane of polarization of linearly polarized laser light incident on a thickness direction section of the resin coating layer perpendicularly to a thickness direction and intensity (I1,119) of a peak attributable to a gauche structure of methylene groups in PET around 1,119 cm-1 determined from the laser Raman spectroscopic analysis is 1.1 or more and less than 1.5 at a position with a distance of 1 ?m from the metal sheet.
B65D 65/40 - Emploi de stratifiés pour des buts particuliers d'emballage
B32B 15/08 - Produits stratifiés composés essentiellement de métal comprenant un métal comme seul composant ou comme composant principal d'une couche adjacente à une autre couche d'une substance spécifique de résine synthétique
A resin coated metal sheet according to the present invention includes: a metal sheet; and a resin layer configured to coat at least one face of the metal sheet. An indentation modulus of the resin layer on a side adhered to the metal sheet is 100 MPa to 300 MPa. A melting point of the resin layer is 210ºC to 270ºC.
B32B 27/36 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyesters
B32B 15/08 - Produits stratifiés composés essentiellement de métal comprenant un métal comme seul composant ou comme composant principal d'une couche adjacente à une autre couche d'une substance spécifique de résine synthétique
B32B 15/09 - Produits stratifiés composés essentiellement de métal comprenant un métal comme seul composant ou comme composant principal d'une couche adjacente à une autre couche d'une substance spécifique de résine synthétique comprenant des polyesters
Provided is a grain-oriented electrical steel sheet on which a linear groove is formed, said steel sheet being capable of achieving both an excellent iron loss reduction effect and a high magnetic flux density. The grain-oriented electrical steel sheet has, in a direction intersecting with a rolling direction of the grain-oriented electrical steel sheet, a linear groove periodically formed in the rolling direction. The linear groove has a center line discontinuity part where the position of the groove width center line of the linear groove is shifted in the groove width direction of the linear groove, and a and b satisfy the relation indicated by expression (1) given below, where a is the groove width of the linear groove and b is the distance in the groove width direction between the center lines at the center line discontinuity part. Expression (1): 0.05 = b/a = 0.95
C25F 3/06 - Attaque de surface du fer ou de l'acier
C25F 3/14 - Attaque de surface localisée, c. à d. gravure
H01F 1/147 - Alliages caractérisés par leur composition
H01F 3/02 - Noyaux, culasses ou induits en feuilles
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
51.
LINEAR GROOVE FORMATION METHOD AND LINEAR GROOVE FORMING APPARATUS, AND METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET
Provided is a method for forming a linear groove in which a linear groove is formed in the surface of a steel sheet by using etching, wherein the method makes it possible to form a linear groove in a uniform shape, and to suppress deterioration in the magnetic characteristics of an oriented magnetic steel sheet in association with radiation of a laser for removing a resist. This method for forming a linear groove has: a resist formation step for forming a resist on the surface of the steel sheet; a laser radiation step for periodically scanning a laser along the rolling direction of the steel sheet, the laser being radiated while being scanned in a direction that traverses the rolling direction of the steel sheet to thereby remove the resist at the portions irradiated with the laser; and an etching step. In the laser radiation step, the resist is removed using two or more laser radiation devices, this removal being performed such that the radiation energy of the lasers radiated from each of the laser radiation devices is less than 30 J/m, the beam diameter of the lasers in a direction orthogonal to the scanning direction thereof is 10-100 µm inclusive, and the angle of incidence of the lasers with respect to the surface of the steel sheet is 20 degrees or less.
C25F 3/14 - Attaque de surface localisée, c. à d. gravure
B23K 26/361 - Enlèvement de matière pour l'ébarbage ou l'ébavurage mécanique
C25F 3/06 - Attaque de surface du fer ou de l'acier
H01F 1/147 - Alliages caractérisés par leur composition
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
52.
METHOD FOR PRODUCING NON-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR PRODUCING MOTOR CORE, AND MOTOR CORE
In the production of a non-oriented electrical steel sheet by subjecting a steel slab having a component composition containing, by mass%, C: not more than 0.0050%, Si: 2.8 to 6.5%, Mn: 0.05 to 2.0%, Zn: 0.0005 to 0.0050% and satisfying Si + Al ? 4 mass% to a hot rolling, a hot-band annealing, a cold rolling and a finish annealing, the conditions of the finish annealing are controlled such that a yield stress of the steel sheet after the finish annealing is not less than 480 MPa. Also, when a motor core is produced by using the above steel sheet, there can be provided a non-oriented electrical steel sheet capable of producing a high strength rotor core and a stator core having excellent magnetic properties after stress-relief annealing as the same raw material where the stator core is subjected to a stress relief annealing at a soaking temperature of 780 to 950°C in an atmosphere having a nitrogen content of not more than 30 vol% and a dew point of not higher than -20°C to suppress nitriding of steel sheet surface, while a motor core is produced with such a steel sheet.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/00 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
Provided is a steel sheet for a can, the steel sheet having high strength and adequately high workability particularly as a material for a can body having a neck section. This steel sheet for a can has: a component composition which contains, in terms of mass%, 0.010-0.130% C, no more than 0.04% Si, 0.10-1.00% Mn, 0.007-0.100% P, 0.0005-0.0090% S, 0.001-0.100% Al, no more than 0.0050% N, 0.0050-0.1000% Ti, 0.0005 to less than 0.0020% B, and no more than 0.08% Cr, and which satisfies the relationship 0.005 = (Ti*/48)/(C/12) = 0.700; and a structure in which the ratio of non-recrystallized ferrite is 3% or less, and the upper yield strength of the steel sheet is 550-620 MPa.
C22C 38/14 - Alliages ferreux, p.ex. aciers alliés contenant du titane ou du zirconium
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
Provided are a grain-oriented electromagnetic steel plate combining low iron loss and low magnetostriction and an advantageous production method therefor. This grain-oriented electromagnetic steel plate comprises a linear distortion section extending in a direction intersecting with a rolling direction. The linear distortion section has a stress distribution wherein compressive stress regions and tensile stress regions are aligned while alternating with one another in the length direction of the linear distortion section. In addition, the linear distortion section is formed by subjecting the steel plate to oscillations in the plate thickness direction when an electron beam is moved and stopped repeatedly in a direction intersecting with the steel plate rolling direction to irradiate the steel plate surface.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
H01F 1/147 - Alliages caractérisés par leur composition
55.
IRON-BASED ALLOY SINTERED BODY AND IRON-BASED MIXED POWDER FOR POWDER METALLURGY
Provided is an iron-based alloy sintered body having a tensile strength of 800 MPa or more, excellent machinability, a microstructure with an average Vickers hardness of 300 Hv or more and 900 Hv or less and a standard deviation of Vickers hardness of 200 Hv or less, and an average pore circularity of 0.30 or more.
B22F 3/00 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittage; Appareils spécialement adaptés à cet effet
The method for manufacturing a motor core according to the present invention includes a step of manufacturing a motor core by processing an electromagnetic steel sheet, in which an average thermal conductivity from the surface to a position at a depth of 1/3 of the sheet thickness from the surface is 30% or more lower than the thermal conductivity at the center position in the plate thickness direction, by fusing by heat input from the surface. The thickness of the electromagnetic steel sheet is desirably 0.20 mm or less. It is also desirable that the concentrations of Si, Al, and Mn from the surface of the electromagnetic steel sheet to the position at a depth of 1/3 of the sheet thickness satisfy predetermined conditions. Further, it is desirable that the component concentration over the entire thickness of the electromagnetic steel sheet be, in % by mass, C: 0.01% or less, Si: 7% or less, Al: 4% or less, Mn: 5% or less.
H02K 15/02 - Procédés ou appareils spécialement adaptés à la fabrication, l'assemblage, l'entretien ou la réparation des machines dynamo-électriques des corps statoriques ou rotoriques
B23K 26/38 - Enlèvement de matière par perçage ou découpage
H02K 1/02 - MACHINES DYNAMO-ÉLECTRIQUES - Détails du circuit magnétique caractérisés par le matériau magnétique
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
57.
ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE FOR HOLLOW STABILIZER
Provided is an electric-resistance-welded steel pipe for a hollow stabilizer, which makes it possible to suppress the generation of not only a ferrite decarburization layer but also a total decarburization layer even when heat treatment is performed in the atmosphere and to obtain a hollow stabilizer having excellent fatigue characteristics. The electric-resistance-welded steel pipe for a hollow stabilizer has a prescribed component composition, and the total decarburization depths on the inner surface and the outer surface thereof are 100 µm or less.
Provided is a low-sulfur coal production method having an excellent desulfurization effect. The production method comprises bringing coal into contact with a chemical material that is a mixed solution of hydrogen peroxide and acetic anhydride to remove sulfur in the coal. It is preferred that the molar ratio of the acetic anhydride to the hydrogen peroxide (i.e., (acetic anhydride)/(hydrogen peroxide)) is 0.5 to 12.0 inclusive. It is preferred that the acetic anhydride is mixed with the hydrogen peroxide before the chemical material is brought into contact with the coal and the chemical material is brought into contact with the coal after 10 minutes or more has elapsed since the mixing.
Provided is a method for producing low-sulfur coal having an excellent desulfurization effect. In the production method, coal is brought into contact with a chemical agent that is a mixed solution of hydrogen peroxide and acetic acid to remove sulfur in the coal, wherein the coal that has been brought into contact with the chemical agent is brought into contact with a hydrogen peroxide solution having a temperature of not more than 40°C. It is preferred that the molar ratio of the acetic acid to the hydrogen peroxide ((acetic acid)/(hydrogen peroxide)) is 1.2 to 60.0 inclusive. It is preferred that the acetic acid is mixed with the hydrogen peroxide before the chemical agent is brought into contact with the coal and the chemical agent is brought into contact with the coal after 30 minutes or more has elapsed since the mixing is performed.
A mixed powder for powder metallurgy comprising an iron-based powder and a lubricant. The lubricant consists of a low-melting-point lubricant having a melting point of 86 C or less and a high-melting-point lubricant having a melting point of more than 86 C. The low-melting-point lubricant is an amide, an ester, an amino group, and/or a carboxyl, a percent by mass of the low-melting-point lubricant to total lubricant between 5 and 90. The ratio of a mass of a free lubricant to a mass of a binding lubricant is between 0 and 15, where the binding lubricant is adhering to a surface of the iron-based powder while the free lubricant is not, and an amount of the low-melting-point lubricant contained as the free lubricant is less than 0.10 parts by mass with respect to 100 parts by mass of the iron-based powder.
B22F 1/10 - Poudres métalliques contenant des agents lubrifiants ou liants; Poudres métalliques contenant des matières organiques
B22F 1/102 - Poudres métalliques revêtues de matériaux organiques
C10M 105/24 - Acides carboxyliques ou leurs sels comportant un seul groupe carboxyle lié à un atome de carbone acyclique ou cycloaliphatique ou à l'hydrogène
METAL STRUCTURE EVALUATOR FOR ROLLED STEEL SHEETS, METHOD FOR EVALUATING METAL STRUCTURE OF ROLLED STEEL SHEET, PRODUCTION FACILITY OF STEEL PRODUCT, METHOD FOR MANUFACTURING STEEL PRODUCT, AND METHOD OF QUALITY MANAGEMENT OF STEEL PRODUCT
A rolled steel sheet metal structure evaluation device according to the present invention comprises: a magnetic characteristic measurement unit that measures a magnetic characteristic in at least two different magnetization directions at an evaluation target point on a surface of a rolled steel sheet, by applying a magnetic field in one direction on the surface of the rolled steel sheet and performing, in at least two different magnetization directions, a process to measure the magnetic characteristic at the evaluation target point; and a determination unit that determines the metal structure of the evaluation target point using the magnetic characteristic that was measured by the magnetic characteristic measurement unit.
G01N 27/72 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques
62.
PRECURSOR, METHOD FOR MANUFACTURING PRECURSOR, POSITIVE ELECTRODE MATERIAL, METHOD FOR MANUFACTURING POSITIVE ELECTRODE MATERIAL, AND LITHIUM-ION SECONDARY CELL
Provided are a precursor of a positive electrode material with which it is possible to obtain a lithium-ion secondary cell having an excellent discharge capacity and cycle characteristics, and a method for manufacturing the precursor. The precursor is a precursor of a positive electrode material used for a lithium-ion secondary cell, wherein the precursor is at least one substance selected from the group consisting of nickel-manganese composite hydroxides and nickel-manganese composite oxides, the precursor contains nickel and manganese, the ratio of the nickel content relative to the nickel content and the manganese content is 0.45-0.60 inclusive in molar ratio, and the average valence of manganese is below 4Ø
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p.ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p.ex. LiNiO2, LiCoO2 ou LiCoOxFy
An iron-based mixed powder for powder metallurgy comprises: an iron based alloy powder; and an alloying powder, wherein the iron-based alloy powder contains Mo: 0.2 mass% or more and 1.5 mass% or less, the alloying powder contains a graphite powder and a copper powder, a ratio of a mass of the graphite powder to a total mass of the iron-based alloy powder and the alloying powder is 0.10 mass% to 1.0 mass%, a ratio of a mass of the copper powder to the total mass of the iron-based alloy powder and the alloying powder is 0.5 mass% to 3.0 mass%, and the copper powder has an average particle size of 25 pm or less, and a specific surface area of 0.30 m2/g or more.
The purpose of the present invention is to provide: a steel material for line pipes, which is thick, has compression strength necessary for the application to a submarine pipe line, excellent low-temperature toughness and DWTT performance and also has excellent collapse resistance performance, and a method for manufacturing the steel material; and a line pipe which has a required level of compression strength, excellent low-temperature toughness and DWTT performance and also has excellent collapse resistance performance, and a method for manufacturing the line pipe. A steel material for line pipes, which has a specified component composition, and has such a property that the metal structure in a region lying at a depth corresponding to 1/8 of the thickness from the steel material surface has a bainite area fraction of 85% or more, a polygonal ferrite area fraction of 10% or less and a martensitic islands area fraction of 5% or less, the 0.23% compression strength at a position corresponding to 1/8 of the thickness from the steel material surface as determined in a direction vertical to the rolling direction is 340 MPa or more, and the temperature at which the percentage of ductile fracture as determined by a DWTT test becomes 85% or more is -10°C or lower.
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C22C 38/58 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
65.
METHOD FOR PRODUCING COAL MIXTURE AND METHOD FOR PRODUCING COKE
Provided is a method for producing a coal mixture, which is a simple method and which can suppress a decrease in coal fluidity better than conventional methods. In this method for producing a coal mixture in which a plurality of types of coal are mixed, formula (1) and formula (2) are satisfied. Formula (2): acalc = 1.2×10-10 (mol/g-coal) In formula (1) and formula (2), acalc is the hydrogen ion release capacity (mol/g-coal) of the coal mixture per unit mass, ai is the hydrogen ion release capacity (mol/g-coal) of a coal i per unit mass, xi is the blending proportion of the coal i blended in the coal mixture, and N is the total number of types of coal contained in the coal mixture.
The present invention provides a method for evaluating whether a coal being evaluated could reduce the strength of coke, the method involving using an apparatus equipped with a stirrer such as a well-known Gieseler plastometer. The coal is evaluated using a Gieseler plastometer 10. A semi-coke 13 is formed from the heated coal in the container 11 of the Gieseler plastometer 10 after measurement of the Gieseler fluidity. The height of the semi-coke 13 on a side wall of the container 11 is designated as b. The height of the semi-coke on 13 the stirrer 12 of the Gieseler plastometer is designated as a. The degree of entanglement (a - b)/a represented by heights a and b, or the height a alone, is used as as an index for evaluating the coal.
G01N 11/14 - Recherche des propriétés d'écoulement des matériaux, p.ex. la viscosité, la plasticité; Analyse des matériaux en déterminant les propriétés d'écoulement en déplaçant un corps à l'intérieur du matériau en utilisant des corps en rotation, p.ex. moulinet
67.
ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE FOR HOLLOW STABILIZER AND METHOD OF MANUFACTURING SAME
Provided is an electric resistance welded steel pipe for hollow stabilizers, which has excellent corrosion fatigue resistance properties. An electric resistance welded steel pipe for hollow stabilizers, which has a component composition comprising, in % by mass, 0.15% or more and less than 0.20% of C, 0.1 to 1.0% of Si, 0.1 to 2.0% of Mn, 0.1% or less of P, 0.01% or less of S, 0.01 to 0.10% of Al, more than 0.05% and 0.1% or less of Ti, 0.0005 to 0.005% of B, 0.0001 to 0.0050% of Ca, 0.0050% or less of N and a remainder made up by Fe and unavoidable impurities, and has such a structure that the cleanliness level is 0 to 0.1% as determined with respect to each of TiS grains each having a grain diameter of 10 µm or more and MnS grains each having a grain diameter of 10 µm or more by a point counting method in accordance with JIS G 0555.
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
C21D 9/08 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour corps tubulaires ou tuyaux
C21D 9/50 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour joints de soudure
C22C 38/14 - Alliages ferreux, p.ex. aciers alliés contenant du titane ou du zirconium
The invention makes it possible to more accurately specify a coal constituting a coal blend that can produce a coke having a desired strength, and the mass ratio of the coal, as compared with the related art. A preparation method for a blended coal, comprises: determining an interfacial tension at which the desired strength is reached from a correlation on the basis of the correlation determined from the strength of a coke produced from the blended coal and a surface tension of the blended coal determined from a surface tension ?100 at which an inert amount is 100%, a surface tension ?0 at which the inert amount is 0%, a blending ratio of each brand of coal in the blended coal, the mass ratio of an inert structure, and the mass ratio of a softening and melting structure; and mixing two or more brands of the coal at a mass ratio ensuring the surface tension at which the desired strength is reached, or a lower surface tension, to prepare the blended coal.
C10B 57/04 - Autres procédés de carbonisation ou de cokéfaction; Caractéristiques générales des procédés de distillation destructive utilisant des charges de composition spéciale
Provided is an iron-based powder for a powder magnetic core, from which a powder magnetic core having a high apparent density and a high green density can be produced. An iron-based powder for a powder magnetic core, which has a largest particle diameter of 1 mm or less, wherein the median value of the degrees of circularity of particles constituting the iron-based powder for a powder magnetic core is 0.40 or more, and the distribution constant in the Rosin-Rammler equation is 0.30 to 90.0 inclusive.
B22F 1/05 - Poudres métalliques caractérisées par la dimension ou la surface spécifique des particules
B22F 1/06 - Poudres métalliques caractérisées par la forme des particules
H01F 1/24 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriés; Emploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques doux métaux ou alliages sous forme de particules, p.ex. de poudre comprimées, frittées ou agglomérées les particules étant isolées
H01F 27/255 - Noyaux magnétiques fabriqués à partir de particules
H02K 1/02 - MACHINES DYNAMO-ÉLECTRIQUES - Détails du circuit magnétique caractérisés par le matériau magnétique
70.
METAL PIPE AND METHOD FOR MANUFACTURING METAL PIPE
Provided is a technology pertaining to: a metal tube that has a high dimension accuracy without the need of cutting of tube end parts after tube expansion, and that has an outer diameter of 150-3000 mm and a thickness of 2-50 mm; and a manufacturing method for the metal tube. This method includes: a tube end part expansion step for expanding tube end parts 11 at both ends of an element tube 1; and an internal pressure application step for, after the tube end part expansion step until an internal pressure p (MPa) according to a change of an axis pushing amount s (mm) indicating a pushing amount at both ends of the element tube 1 in the tube axial direction with respect to tube endmost sections 12 reaches a preset maximum internal pressure pmax (MPa), expanding the element tube 1 by applying the internal pressure p to the entirety of the inside of the element tube 1, wherein p and s satisfy formula (2): 5×(p/pmax)×(a/200)×L0=s=(p/pmax)×(a/200)×L0. In formula (2), 'a' represents a preset tube expansion percentage (%) and 'a' satisfies 0.30=a=5.0, and L0 represents an average length (mm) of the element tube.
B21D 3/16 - Redressage ou remise en forme des barres, tubes ou profilés métalliques, ou des objets déterminés faits à partir de ces matériaux, qu'ils comportent ou non des parties en tôle d'objets déterminés faits de barres, tubes ou profilés métalliques, p.ex. de vilebrequins, en utilisant des méthodes ou des moyens spécialement adaptés à ce but
B21D 26/041 - Moyens de commande pour commander le fluide, p.ex. la pression ou la température
B21D 26/043 - Moyens pour commander le poussoir axial
The objective of the present invention is to propose welding conditions for forming welded joint portions stably at all times, and with which a difference in the hardness of a flash-butt welded joint portion and a rail base material and an amount of deflection during a bending test lie in an improved range. When a plurality of rail base materials having a component composition containing C: 0.60 to 1.20% by mass, Si: 0.10 to 1.50% by mass, Mn: 0.10 to 1.50% by mass, and Cr: 0.10 to 1.50% by mass, the remainder being Fe and unavoidable impurities, are to be joined by way of a joint portion using flash-butt welding, the flash-butt welding is performed with a welding heat input amount at least equal to 1.50×105 kA2×seconds and at most equal to 4.50×105 kA2×seconds.
B23K 31/00 - Procédés relevant de la présente sous-classe, spécialement adaptés à des objets ou des buts particuliers, mais non couverts par un seul des groupes principaux
A blast furnace operation method according to one aspect of the present invention comprises the steps of: previously determining the correlation between a carbon intensity in a reducing gas and a carbon consumption intensity reduction amount Input?C due to the blowing of the reducing gas into a blast furnace for every C/H molar ratio between carbon atom and hydrogen atom in the reducing gas; determining a carbon intensity which becomes equal to or larger than a predetermined target value for the carbon consumption intensity reduction amount Input?C in the reducing gas on the basis of the correlation that has been determined for every C/H molar ratio; and adjusting the blow amount of the reducing gas to be blown into the blast furnace on the basis of the carbon intensity in the reducing gas which had been determined in the proceeding step and the content ratio of carbon in the reducing gas.
The purpose is to provide an electromagnetic steel sheet having an insulation coating film attached thereto, which exhibits excellent coating film detachment resistance during a press processing and is prevented from the aggregation of a coating film onto a mold. An electromagnetic steel sheet having an insulation coating film attached thereto, which comprises an electromagnetic steel sheet and an insulation coating film arranged on at least one surface of the electromagnetic steel sheet, wherein the insulation coating film contains P and Al and contains a complex having an aspect ratio of 1 to 10, wherein the particle diameter of the complex is 10 to 1000 nm and the film thickness of the insulation coating film is 500 to 2000 nm.
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p.ex. revêtement par conversion, passivation des métaux
74.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING SAME
When a non-oriented electromagnetic steel sheet is produced by hot-rolling a slab, performing hot-rolled-sheet annealing on the hot-rolled slab, performing cold-rolling to form a cold-rolled sheet with a final sheet thickness, and performing finish annealing on the cold-rolled sheet, the slab containing, by mass%, 0.0050% or less of C, 3.2-5.0% of Si, 2.0% or less of Mn, 0.02% or less of P, 0.0050% or less of S, 0.5-2.0% of Al, and 0.0050% or less of N, and satisfying Si+Al=4.0%, a non-oriented electromagnetic steel sheet is obtained, which has a recrystallization ratio of less than 100% by area ratio by setting the rolling reduction of the finish-rolling final pass in hot rolling to be 10% or more, the winding temperature of a coil to be 620 °C or less, the soaking temperature of the finish annealing to be 600-800 °C, and which has high strength and low iron loss by setting a strength C to be 2.0 or more and a strength difference C-D to be 2.0 or less where the strength at F=0° and f1=0° in a cross-section at f2=45° of ODF obtained from a central layer in the sheet thickness is C, and the strength at F=20° and f1=0° is D.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
Proposed is a non-oriented electrical steel sheet being low in iron loss and excellent in tensile strength and fatigue strength, which has a chemical composition comprising C: not more than 0.005 mass%, Si: 3 to 5 mass%, Mn: not more than 5 mass%, P: not more than 0.1 mass%, S: not more than 0.01 mass%, Al: not more than 3 mass%, N: not more than 0.005 mass%, Zn: 0.0005 mass% to 0.003 mass%, and the remainder being Fe and inevitable impurities, an average crystal grain size being not more than 40 pm, the number of the inclusions having a diameter of not less than 5pm being not more than 5/mm2, a tensile strength being not less than 600 MPa, and the fatigue strength being not less than 450 MPa.
H01F 1/147 - Alliages caractérisés par leur composition
H01F 1/16 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriés; Emploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques doux métaux ou alliages sous forme de feuilles
76.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING SAME
When this non-oriented electrical steel sheet is produced by hot-rolling a slab containing 0.0050 mass% or less of C, 2.8-6.5 mass% of Si, 0.05-2.0 mass% of Mn, 0.10 mass% or less of P, 0.0050 mass% or less of S, 0.3-2.0 mass% of Al, 0.0050 mass% or less of N, and 0.0005-0.0050 mass% of Zn, performing a hot-rolled sheet annealing, performing a cold-rolling, and performing a finish annealing, a dew point during the hot-rolled sheet annealing is set to 0-70°C, and during the finish annealing, the nitrogen content in the atmosphere is set to 30 vol% or less and the dew point is set to -20°C or less. Thus, the ratio of the amount of nitrogen present as AlN in the total sheet thickness to the amount of nitrogen present as AlN in a layer from one side surface of the steel sheet to 1/20 of the sheet thickness is made 5.0 or more, thereby obtaining a non-oriented electrical steel sheet having a high magnetic flux density and a low high-frequency iron loss, without causing a decrease in magnetic flux density and a decrease in productivity.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 38/14 - Alliages ferreux, p.ex. aciers alliés contenant du titane ou du zirconium
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
H01F 1/147 - Alliages caractérisés par leur composition
Provided is a steel plate for a can, the steel plate having a high strength, and in particular, having sufficiently high processing accuracy as a material for a curled portion of a can lid. A steel sheet for a can according to the present invention contains: 0.010-0.130 mass% of C; 0.04 mass% or less of Si; 0.10-1.00 mass% of Mn; 0.007-0.100 mass% of P; 0.0005-0.0090 mass% of S; 0.001-0.100 mass% of Al; 0.0050 mass% or less of N; 0.0050-0.1000 mass% of Ti; and 0.08% or less of Cr, with the balance comprising Fe and inevitable impurities, wherein when Ti*=Ti-1.5S, the relationship 0.005=(Ti*/48)/(C/12) =0.700 is satisfied, , and the steel sheet has a structure in which the proportion of cementite in ferrite grains is 10% or less, and has an upper yield strength of 550 MPa or more.
Provided is an electric resistance welded steel pipe in which, despite a carbon content of 0.40% or more, quenching cracks do not occur and which also has excellent fatigue strength. The electric resistance welded steel pipe has a component composition consisting of, in mass%, C: 0.40-0.55%, Si: 0.10-1.0%, Mn: 0.10-2.0%, P: 0.10% or less, S: 0.010% or less, Al: 0.010-0.100%, Cr: 0.05-0.30%, Ti: 0.010-0.050%, B: 0.0005-0.0030%, Ca: 0.0001-0.0050%, and N: 0.0005-0.0050%, the balance being Fe and unavoidable impurities, and the outer surface and the inner surface have ferrite decarburized layers of 20-50 µm depth from the surface.
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
C21D 9/08 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour corps tubulaires ou tuyaux
C21D 9/50 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour joints de soudure
C22C 38/38 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et plus de 1,5% en poids de manganèse
C22C 38/58 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
79.
FERRITIC STAINLESS STEEL SHEET AND METHOD FOR PRODUCING SAME
Provided are: a thick ferritic stainless steel sheet having excellent die-cut properties and excellent corrosion resistance; and a method for manufacturing the ferritic stainless steel sheet advantageously. The ferritic stainless steel sheet has a specified component composition, and the area ratio of crystal grains each having a grain diameter of 45 µm or more is 20% or less in the ferritic stainless steel sheet.
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
Disclosed is a grain-oriented electrical steel sheet with extremely low iron loss by means of a magnetic domain refining technique. In a grain- oriented electrical steel sheet having a plurality of magnetic domains refined via a local strain introduction portion, when a direct-current external magnetic field is applied to the steel sheet in a rolling direction, for a magnetic flux leaked from the local strain introduction portion at a position 1.0 mm away from a surface of the steel sheet at a side of the local strain introduction portion, a value obtained by dividing an intensity level of a total leakage magnetic flux by an intensity level of a magnetic flux leaked due to causes other than strain is more than 1.2.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
B23K 26/00 - Travail par rayon laser, p.ex. soudage, découpage ou perçage
H01F 1/16 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriés; Emploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques doux métaux ou alliages sous forme de feuilles
H01F 27/245 - Noyaux magnétiques fabriqués à partir de tôles, p.ex. à grains orientés
81.
DUPLEX STAINLESS STEEL SEAMLESS PIPE AND METHOD FOR MANUFACTURING SAME
The present invention addresses the problem of providing: a duplex stainless seamless steel pipe which has excellent corrosion resistance, high tensile yield strength in the pipe axis direction, and a small difference between the tensile yield strength and the compressive yield strength both in the pipe axis direction; and a method for manufacturing the duplex stainless seamless steel pipe. A duplex stainless seamless steel pipe having a component composition containing, in % by mass, 0.005 to 0.08% of C, 0.01 to 1.0% of Si, 0.01 to 10.0% of Mn, 20 to 35% of Cr, 1 to 15% of Ni, 0.5 to 6.0% of Mo, 0.150% or more and less than 0.400% of N, further containing at least one component selected from Ti in an amount of 0.0001 to 0.3%, Al in an amount of 0.0001 to 0.3%, V in an amount of 0.005 to 1.5% and Nb in an amount of 0.005% or more and less than 1.5%, with the remainder made up by Fe and unavoidable impurities, wherein N, Ti, Al, V and Nb are contained in such a manner that the requirement represented by formula (1) can be satisfied, the tensile yield strength in the pipe axis direction is 757 MPa or more, and the (compressive yield strength in the pipe axis direction)/(tensile yield strength in the pipe axis direction) ratio is 0.85 to 1.15. 0.150 > N-(1.58Ti+2.70Al+1.58V+1.44Nb) (1) In the formula, "N", "Ti", "Al", "V" and "Nb" respectively represent the contents (% by mass) of these elements. (When each of the elements are not contained, the value is 0 (zero) %.)
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
C21D 9/08 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour corps tubulaires ou tuyaux
Provided are a laminated iron core elastic matrix determination method and vibration analysis method with which it is possible to optimally determine a modulus of transverse elasticity in two planes including the lamination direction of a laminated iron core, said modulus of transverse elasticity being included in the elastic matrix in a constitutive equation that is used for vibration analysis and that represents a relationship between stress and strain. When a constitutive equation representing a relationship between stress and strain in a matrix representation is used to perform vibration analysis on a laminated iron core (21) obtained by laminating steel plates (22) together, a modulus of transverse elasticity in two planes including the lamination direction of the laminated iron core (21) is determined in accordance with the average clamping pressure in the lamination direction of the laminated iron core (21), said modulus of transverse elasticity being included in the elastic matrix in the constitutive equation.
G01N 3/32 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique en appliquant des efforts répétés ou pulsatoires
H01F 27/26 - Fixation des parties du noyau entre elles; Fixation ou montage du noyau dans l'enveloppe ou sur un support
83.
METHOD FOR PRODUCING NON-ORIENTED ELECTRICAL STEEL SHEET
When a non-oriented electrical steel sheet is produced by subjecting a steel slab containing, in mass%, C: :s; 0.0050%, Si: 1.0 to 6.5%, Mn: 0.05 to 2.0%, S: :s; 0.0050%, Al: :s; 0.01 %, N: :s; 0.0050%, Ti: :s; 0.0030%, Nb: :s; 0.0030% and 0: :s; 0.0050% to a hot rolling, a cold rolling and a finish annealing, the finish annealing is conducted under conditions that a soaking temperature T (° C) satisfies the following equation (1): ... (1), and an atmosphere in the finish annealing is a mixed gas composed of one or more selected from nitrogen, hydrogen and noble gas and having a nitrogen content of not more than 50 vol% and has a dew point of not higher than -20° C, whereby a non-oriented electrical steel sheet achieving a high magnetic flux density and a low iron loss is produced.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
A non-oriented electrical steel sheet having an average magnetostriction kp-p at 400 Hz and 1.0 T of not more than 4.5 X 10-6 is described, with an area ratio of recrystallized grains at a section in rolling direction of steel sheet of 40 to 95%. An average grain size of 10 to 40 pm is obtained by subjecting a steel slab containing, in mass%, C: not more than 0.005%, Si: 2.8 to 6.5%, Mn: 0.05 to 2.0%, Al: not more than 3.0%, P: not more than 0.20%, S: not more than 0.005%, N: not more than 0.005%, Ti: not more than 0.003%, V: not more than 0.005% and Nb: not more than 0.005% and satisfying Si ¨ 2A1 ¨ Mn > 0 to hot rolling, hot- band annealing, cold rolling and finish annealing under adequate cold rolling conditions and finish annealing conditions. A motor core is manufactured using such a steel sheet.
B21B 1/22 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilés; Séquence des opérations dans les trains de laminoirs; Installation d'une usine de laminage, p.ex. groupement de cages; Succession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies
B21B 3/02 - Laminage des alliages ferreux particuliers
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/00 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
C22C 38/14 - Alliages ferreux, p.ex. aciers alliés contenant du titane ou du zirconium
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
H01F 1/147 - Alliages caractérisés par leur composition
85.
FILM FOR COATING METAL SHEET AND RESIN COATED METAL SHEET
This film for coating a metal plate is characterized in that: the ratio of the Young's modulus EMD in the machine direction to the the Young's modulus ETD in the transverse direction, namely (EMD/ETD) is within the range of from 1.1 to 4.0 (inclusive); and the thermal shrinkage at 200°C as measured by a thermomechanical analyzer is 20% or less in both the machine direction and the transverse direction. It is preferable that the sum of the Young's modulus EMD in the machine direction and the the Young's modulus ETD in the transverse direction, namely (EMD + ETD) is within the range of from 3,000 MPa to 12,000 MPa (inclusive). It is also preferable that the lowest melting peak temperature Tm1 is within the range of from 210°C to 280°C (inclusive).
B29C 55/04 - Façonnage par étirage, p.ex. étirage à travers une matrice; Appareils à cet effet de plaques ou de feuilles suivant un seul axe, p.ex. étirage oblique
B29C 55/14 - Etirage suivant plusieurs axes suivant deux axes successivement
B32B 15/08 - Produits stratifiés composés essentiellement de métal comprenant un métal comme seul composant ou comme composant principal d'une couche adjacente à une autre couche d'une substance spécifique de résine synthétique
86.
HOT-ROLLED AND ANNEALED FERRITIC STAINLESS STEEL SHEET AND METHOD FOR PRODUCING THE SAME
The present invention provides: a ferrite stainless hot-rolled-and-annealed steel sheet that is excellent for punching, has substantial corrosion resistance, and makes it possible to achieve a prescribed dimensional precision without cracking when punched into a thick flange; and a production method for the ferrite stainless hot-rolled-and-annealed steel sheet. A ferrite stainless hot-rolled-and-annealed steel sheet that has a ferrite single phase structure that has a component composition that contains, by mass%, 0.001%0.020% of C, 0.05%1.00% of Si, 0.05%1.00% of Mn, no more than 0.04% of P, no more than 0.01% of S, 0.01%0.10% of Al, 10.0%20.0% of Cr, 0.50%2.00% of Ni, 0.10%0.40% of Ti, and 0.001%0.020% of N, the remainder being Fe and unavoidable impurities, the average crystal grain size of the metal structure of the ferrite single phase structure being 520 µm.
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C22C 38/50 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/54 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et du bore
Provided is a method for manufacturing water-atomized metal powder via low-cost, high-productivity water atomization, the method being capable of increasing amorphization and apparent density even for metal powders having a high Fe concentration. In the method for manufacturing water-atomized metal powder: in a region in which the average temperature of a molten metal stream, which has an Fe concentration of at least 76.0 at% and less than 82.9 at%, is at least 100°C higher than the melting point, primary cooling water is sprayed from a plurality of directions; a convergence angle, constituted by the angle between an impact direction of the primary cooling water, with respect to the molten metal stream, from one of the plurality of directions and an impact direction of the primary cooling water, with respect to the molten metal stream, from another one of the directions is 1025°; and secondary cooling water is sprayed so that the impact pressure thereof with respect the metal powder in a region in which at least 0.0004 seconds has elapsed from the impact of the primary cooling water and the average temperature of the metal powder is at least the melting point and no more than the melting point + 100°C is 10 MPa or greater.
B22F 9/08 - Fabrication des poudres métalliques ou de leurs suspensions; Appareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau liquide par coulée, p.ex. à travers de petits orifices ou dans l'eau, par atomisation ou pulvérisation
C22C 45/02 - Alliages amorphes avec le fer comme constituant majeur
Provided is a non-oriented electromagnetic steel sheet that has a low Al content, supports an excellent iron scrap recyclability, and exhibits a low iron loss at high magnetic flux densities. The non-oriented electromagnetic steel sheet according to the present invention has a component composition that contains not more than 0.0050 mass% of C; 1.5 to 5.0 mass% of Si; 0.2 to 3.0 mass% of Mn; not more than 0.0030 mass% of sol. Al; not more than 0.2 mass% of P; not more than 0.0050 mass% of S; not more than 0.0040 mass% of N; 0.0010 to 0.0080 mass% of T. Ca; not more than 0.0100 mass% of T. O; and 0.0001 to 0.0050 mass% of REM, wherein the balance includes Fe and unavoidable impurities. The mass ratio of the four components T. Ca, REM, T. O, and S ((T. Ca+REM)/(T. O+S)) is at least 0.4.
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
H01F 1/147 - Alliages caractérisés par leur composition
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
89.
ELECTRICAL STEEL SHEET WITH INSULATING FILM AND METHOD FOR MANUFACTURING THE SAME
The purpose of the present invention is to provide: an electromagnetic steel sheet having an insulation coating film attached thereto, which can have excellent chromium elution resistance even when the baking of the insulation coating film is carried out by rapid heating that is advantageous for the improvement in productivity; and a method for producing the electromagnetic steel sheet. An electromagnetic steel sheet having an insulation coating film attached thereto, which is provided with an electromagnetic steel sheet and an insulation coating film formed on at least one surface of the electromagnetic steel sheet and containing Fe, Cr, an organic resin and an organic reducing agent, wherein the molar ratio of the content of Fe to the content of Cr (i.e., (Fe/Cr)) in the insulation coating film is 0.010 to 0.6.
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p.ex. revêtement par conversion, passivation des métaux
C23C 22/30 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p.ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses acides d'un pH < 6 contenant des composés du chrome hexavalent contenant aussi du chrome trivalent
90.
STEEL SHEET FOR CAN MAKING AND METHOD FOR MANUFACTURING THE SAME
The purpose of the present invention is to provide: a steel sheet for cans, which has excellent weldability and post-processing corrosion resistance; and a method for producing the steel sheet for cans. A steel sheet for cans, comprising a steel sheet, and an iron/nickel-diffused layer, a metal chromium layer and a chromium oxide layer which are arranged on at least one surface of the steel sheet as observed from the steel sheet side, wherein the iron/nickel-diffused layer has a nickel attachment amount per one surface of the steel sheet of 50 to 500 mg/m2 inclusive and also has a thickness on one surface of the steel sheet of 0.060 to 0.500 µm inclusive, the metal chromium layer includes a flat-plate-like metal chromium layer and a granular metal chromium layer formed on the surface of the flat-plate-like metal chromium layer, the total chromium attachment amount in both of the flat-plate-like metal chromium layer and the granular metal chromium layer per one surface of the steel sheet is 60 to 200 mg/m2 inclusive, the granular metal chromium layer has granular protrusions having a number-based density of 5 granules/µm2 or more per unit area and a largest granule diameter of 150 nm or less, and the chromium oxide layer has a chromium attachment amount per one surface of the steel sheet of 3 to 10 mg/m2 inclusive in terms of metal chromium content.
The purpose of the present invention is to provide: a duplex stainless steel seamless pipe which has a small difference between the tensile yield strength and the compressive yield strength in the pipe axial direction, while exhibiting excellent corrosion resistance; and a method for producing this duplex stainless steel seamless pipe. A duplex stainless steel seamless pipe which has a component composition containing, in mass%, from 0.005% to 0.08% of C, from 0.01% to 1.0% of Si, from 0.01% to 10.0% of Mn, from 20% to 35% of Cr, from 1% to 15% of Ni, from 0.5% to 6.0% of Mo and 0.005% or more but less than 0.150% of N, with the balance being made up of Fe and unavoidable impurities, and which is configured such that: the tensile yield strength in the pipe axial direction is 689 MPa or more; and the value of (compressive yield strength in pipe axial direction)/(tensile yield strength in pipe axial direction) is from 0.85 to 1.15.
C22C 38/44 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
C22C 30/00 - Alliages contenant moins de 50% en poids de chaque constituant
Provided is a soft magnetic powder which makes it possible to manufacture a dust core having excellent magnetic properties (a low core loss, a high saturation magnetic flux density). A soft magnetic powder having a chemical composition represented by the compositional formula: FeaSibBcPdCueMf excluding unavoidable impurities, wherein, in the compositional formula, M represents at least one element selected from the group consisting of Nb, Mo, Zr, Ta, W, Hf, Ti, V, Cr, Mn, C, Al, S, O and N, the requirements represented by the formulae: 79 at% ? a ? 84.5 at%, 0 at% ? b < 6 at%, 0 at% < c ? 10 at%, 4 at% < d ? 11 at%, 0.2 at% ? e ? 0.53 at%, 0 at% ? f ? 4 at%, and a + b + c + d + e + f = 100 at% are satisfied, the particle diameters are 1 mm or smaller, and the median of the degrees of circularity of particles constituting the soft magnetic powder is 0.4 to 1.0 inclusive.
H01F 1/22 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriés; Emploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques doux métaux ou alliages sous forme de particules, p.ex. de poudre comprimées, frittées ou agglomérées
B82Y 25/00 - Nanomagnétisme, p.ex. magnéto-impédance, magnétorésistance anisotropique, magnétorésistance géante ou magnétorésistance à effet tunnel
B22F 1/05 - Poudres métalliques caractérisées par la dimension ou la surface spécifique des particules
B22F 1/06 - Poudres métalliques caractérisées par la forme des particules
An Fe-based nanocrystalline alloy powder comprising a chemical composition represented by formula: FeaSibBcPdaleMf, wherein M is at least one element selected from the group consisting of Nb, Mo, Zr, Ta, W, Hf, Ti, V, Cr, Mn, C, Al, S, 0 and N, 79 at% a 84.5 at%, 0 at% b < 6 at%, 0 at% < c 10 at%, 4 at% < d 11 at%, 0.2 at% e 0.53 at%, 0 at% f 4 at%, and a +b+c+d+e+f= 100 at%; and comprising particles having a particle size is 1 mm or less, a median of circularity of the particles of 0.4 or more to 1.0 or less, a degree of crystallinity which is more than 10 % by volume, and an Fe crystallite diameter is 50 nm or less.
H01F 1/22 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriés; Emploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques doux métaux ou alliages sous forme de particules, p.ex. de poudre comprimées, frittées ou agglomérées
ELECTRICAL STEEL SHEET HAVING INSULATING COATING, METHOD FOR PRODUCING THE SAME, TRANSFORMER CORE AND TRANSFORMER USING THE ELECTRICAL STEEL SHEET, AND METHOD FOR REDUCING DIELECTRIC LOSS IN TRANSFORMER
Provided is an insulation film-equipped electromagnetic steel sheet in which, when being used for an iron core of a transformer, dielectric loss of the transformer can be reduced. This insulation film-equipped electromagnetic steel sheet has, on at least one of the surfaces of the electromagnetic steel sheet, an insulation film having a dielectric constant at 1000Hz of 15.0 or less and a dielectric loss tangent of 20.0 or less.
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p.ex. revêtement par conversion, passivation des métaux
Provided is a non-oriented electromagnetic steel sheet having essentially no Al added thereto, and having a large added amount of Si and Mn and low iron loss. The present invention has a component composition containing 0.0050% or less of C, 2.0% to 6.0% Si, 1.0% to 3.0% Mn, 0.20% or less of P, 0.0050% or less of S, 0.0050% or less of N, and 0.0050% or less of Al, as well as one or more contents selected from 0.0001% to 0.0050% B, 0.0001% to 0.0050% Nb, and 0.0005% to 0.0500% V, the remainder being Fe and unavoidable impurities, and has a number density of Si-Mn nitrides having an average diameter of 50 nm to 500 nm of 1/µm3 or less.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 38/12 - Alliages ferreux, p.ex. aciers alliés contenant du tungstène, du tantale, du molybdène, du vanadium ou du niobium
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
H01F 1/147 - Alliages caractérisés par leur composition
The motor according to the present invention is capable of performing motor drive control to lower the magnetic flux density of an iron core while driving at a rotation speed lower than a maximum rotation speed, the motor being characterized in that a steel sheet used as a core material in the motor comprises, by mass%, at most 0.010% of C, 2.0-7.0% of Si, at most 2.0% of Al, 0.05-1.0% of Mn, at most 0.005% of S, and at most 0.005% of N, with the remainder being Fe and unavoidable impurities, has a magnetic flux density change region where a change ?B in magnetic flux density with respect to a magnetic field change ?H=50 A/m is at least 0.50 T, has a sheet thickness that falls within a range of 0.05-0.20 mm, and also has an eddy current loss of at most 0.55 with respect to a total iron loss at 1000 Hz - 1.0 T.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
In the production of an oriented magnetic steel sheet from a steel slab containing, in terms of mass%, C: 0.002-0.15%, Si: 2.5-6.0%, Mn: 0.01-0.80%, Al: 0.010-0.050%, and N: 0.003-0.020%, an oriented magnetic steel sheet having excellent iron loss characteristics and reduced variation in iron loss is produced by satisfying the following: the temperature increase rate during decarburization annealing is 80oC/s or higher at 500-700oC range; the surface roughness Ra of the work roll of the final cold rolling is 0.01-3.0 µm; the total content of alkali earth metal in an annealing separator with respect to MgO is 0-5 mass%; the average length L of through crystal grains in the rolling direction is 25 mm or less; the number ratio of crystal grains having a rolling direction length of 5 mm or less is 40-90%; and the abundance ratio of alkali earth metal sulfide having, on a cross section of a forsterite film, an equivalent circular diameter of 0.5 µm or greater per unit length in the plate width direction is 0.2 pcs/µm or less.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 38/60 - Alliages ferreux, p.ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
H01F 1/147 - Alliages caractérisés par leur composition
The present invention reduces vibration of an iron core and ameliorates the noise of a transformer. An iron core for a transformer, said iron core having a plurality of oriented electromagnetic steel sheets laminated therein, wherein in at least one of the oriented electromagnetic steel sheets, (1) the oriented electromagnetic steel sheet has a region in which a closure domain is formed in a direction intersecting a rolling direction, and a region in which a closure domain is not formed, and when S is the area of the oriented electromagnetic steel sheet, S1 is the area of the region in which a closure domain is formed, S0 is the area of the region in which a closure domain is not formed, and S1a is the area of a region that is within the region in which a closure domain is formed and experiences, when excited in the rolling direction at a maximum magnetic flux density of 1.7T and a frequency of 50Hz, at least 2×10-7 more elongation at a maximum displacement point than the elongation of the region in which the closure domain is not formed, (2) the area ratio R0, which is defined as the ratio of S0 to S, is 0.10-3.0%, and (3) the area ratio R1a, which is defined as the ratio of S1a to S1, is 50% or more.
H01F 27/245 - Noyaux magnétiques fabriqués à partir de tôles, p.ex. à grains orientés
H01F 1/16 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriés; Emploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques doux métaux ou alliages sous forme de feuilles
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
H01F 41/02 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateurs; Appareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants
In order to provide a rail in which wear resistance and fatigue damage resistance are effectively enhanced, a surface section extending to a depth of at least 0.5 mm from the surface of a head part of a rail according to the present invention has a metal structure comprising a pearlite structure and a structure other than a pearlite structure, the pearlite structure having a Vickers hardness of 420 HV to 520 HV, and the structure other than a pearlite structure having a Vickers hardness of 350 HV to 420 HV.
Provided is a rail in which the characteristics of wear resistance and fatigue damage resistance are both enhanced. The present invention has a component composition containing, so as to satisfy formula (1), 0.70% by mass to 0.85% by mass of C, 0.50% by mass to 1.60% by mass of Si, 0.20% by mass to 1.00% by mass of Mn, 0.035% by mass or less of P, 0.012% by mass or less of S, and 0.40% by mass to 1.30% by mass of Cr, the remainder comprising Fe and unavoidable impurities, the Vickers hardness in a region between a depth positions of 0.5 mm and 25 mm from the surface of a rail head part being 370 HV to less than 520 HV, the total area ratio of a pearlite structure and a bainite structure in the region being 98% or greater, and the area ratio of bainite structure in the region being more than 5% and less than 20%. (1): 0.30 = [%Si]/10 + [%Mn]/6 + [%Cr]/3 = 0.55, where [%M] is the content (% by mass) of element M in the component composition.
brevets
