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.
Provided is a method for manufacturing a grain-oriented electrical steel sheet to reduce iron loss by controlling the magnetic domain structure, in which the iron loss reduction effect can be maintained even when stress relief annealing is applied, and the magnetic flux density does not decrease after the magnetic domain control treatment. In the manufacturing method, on a surface of the grain oriented electrical steel sheet, a laser beam with a ring-shaped intensity distribution in which the intensity in a periphery is lower than that in a center is irradiated in a linear manner in a direction intersecting a rolling direction 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
C21D 6/00 - Traitement thermique des alliages ferreux
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
C22C 38/12 - Alliages ferreux, p.ex. aciers alliés contenant du tungstène, du tantale, du molybdène, du vanadium ou du niobium
Provide is a steel sheet that is subjected to complex forming for which press forming is difficult, exhibits a low sliding resistance in a portion having a risk of cracking during the press forming, and has excellent press formability and good film-removal properties in a portion where the contact pressure is high and the occurrence of mold galling is expected. The steel sheet includes a steel sheet original sheet and a coating formed on at least one surface of the steel sheet original sheet, wherein: the coating includes an organic resin and wax; the arithmetic mean roughness Ra of the steel sheet original sheet is 0.4 µm or more; the organic resin is at least one of an acrylic resin, an epoxy resin, a urethane resin, a phenol resin, a vinyl acetate resin, and a polyester resin; the wax is a polyolefin wax having a melting point of 120-140°C, inclusive, and an average particle diameter of 3.0 µm or less; the percentage of the wax in the coating is 10 mass% or more; and the standard deviation σ of the adhesion amount distribution of the coating per one side of the coating is less than 0.9 g/m2.
The present invention provides a continuous annealing apparatus which is capable of producing a steel sheet that has excellent hydrogen embrittlement resistance characteristics. A continuous annealing apparatus (100) according to the present invention comprises: a pay-off reel (10) for feeding a cold-rolled steel sheet (S) from a cold-rolled coil (C); an annealing furnace (20) through which the cold-rolled steel sheet (S) is passed to anneal the cold-rolled steel sheet (S) continuously, and in which a heating zone (22), a soaking zone (24) and a cooling zone (26) are positioned in this order from the upstream side as observed in a plate-passing direction so that the cold-rolled steel sheet (S) is annealed in a hydrogen-containing reducing atmosphere in the heating zone (22) and the soaking zone (24) and the cold-rolled steel sheet (S) is cooled in the cooling zone (26); a downstream facility (30) which is configured such that the cold-rolled steel sheet (S) discharged from the annealing furnace (20) is passed through the downstream facility (30) ongoingly; a tension reel (50) for winding up the cold-rolled steel sheet (S) that is passing through the downstream facility (30); and a magnetic field application device (60) for applying a stationary magnetic field to the cold-rolled steel sheet (S), which is passing from the cooling zone (26) to the tension reel (50), in the sheet width direction of the cold-rolled steel sheet (S).
Provided is a steel sheet which is less prone to LME cracking, has a composition containing 1.0 mass% or less of Si, achieves a strength of at least 1470 MPa in TS, and has excellent formability and excellent delayed fracture resistance. The steel sheet has a predetermined composition, and has a composite structure mainly composed of martensite and bainite, wherein the maximum diameter of carbides present inside the martensite is 400 nm or less, the number density of the bainite is at least 120×10-4/μm2, and the number percentage of bainite having an aspect ratio of at least 1.8 is 60% or more.
Provided are a design method, a manufacturing method, a construction method, and a screwing-type steel pipe pile where it is possible to perform construction suitable to the state of the ground, i.e., soft ground or hard ground, without negatively affecting bearing capacity. A screwing-type steel pipe pile 1 according to the present invention is such that arc-shaped rotary blades 3 obtained by splitting a doughnut-shaped disk or a disk larger than the outer diameter of a steel pipe 2 are provided in a series of two or more in the circumferential direction on the leading end of the steel pipe 2, and the attachment angle of a lowermost blade 3a which is the rotary blade 3, from among the rotary blades 3, disposed so as to be the lowest on the pipe 2 is smaller than the attachment angle of the uppermost blade 3b which is the rotary blade 3 disposed so as to be highest.
The method for predicting delayed fracture in a press-formed article pertaining to the present invention includes: a step (S1) for calculating a stress distribution and a strain distribution of a press-formed article; a step (S5) for setting a hydrogen concentration distribution corresponding to the strain distribution calculated for the press-formed article on the basis of an expression relating strain and hydrogen concentration that is acquired in advance for a high-tensile steel plate; a step (S7) for performing a hydrogen diffusion analysis for the press-formed article on the basis of the stress distribution and the hydrogen concentration distribution and calculating a hydrogen concentration distribution after hydrogen diffusion; and a step (S9) for predicting a site of occurrence of delayed fracture in the press-formed article on the basis of a delayed fracture determination condition based on the stress, strain, and hydrogen concentration acquired in advance, and the stress distribution, the strain distribution, and the hydrogen concentration distribution after hydrogen diffusion.
G01N 3/28 - Recherche de la ductilité, p.ex. de l'aptitude des métaux en feuilles à l'emboutissage profond ou au filage
B21D 22/00 - Mise en forme sans coupage, par estampage, repoussage ou emboutissage
G01N 3/08 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique par application d'efforts permanents de traction ou de compression
G01N 17/00 - Recherche de la résistance des matériaux aux intempéries, à la corrosion ou à la lumière
8.
MICROORGANISM-CORROSION-RESISTANT LOW-ALLOY STEEL MATERIAL AND METHOD FOR PRODUCING SAME
The purpose of the present invention is to provide a microorganism-corrosion-resistant low-alloy steel material and a method for producing the microorganism-corrosion-resistant low-alloy steel material. Provided is a microorganism-corrosion-resistant low-alloy steel material characterized by having a component composition comprising, in % by mass, 0.01 to 0.50% of C, 0.01 to 1.00% of Si, 0.10 to 3.00% of Mn, 0.030% or less of P, 0.0100% or less of S, 0.0100% or less of N, 0.001 to 0.30% of Al, 4.00% or less of Cr, 0.10 to 2.50% of Cu and a remainder comprising Fe and unavoidable impurities and also having a ratio of a minimum value to a maximum value (i.e., a (minimum value)/(maximum value) ratio) of the dislocation density of the steel sheet surface of 0.40 or more. Also provided is a method for producing a microorganism-corrosion-resistant low-alloy steel material, in which the final pass reduction ratio in a temperature range from 1000 to 1100°C is managed within a range from 5 to 20% during the hot rolling of a steel material having the above-mentioned component composition.
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 38/38 - Alliages ferreux, p.ex. aciers alliés contenant du chrome 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
9.
HIGH-STRENGTH STEEL SHEET AND MANUFACTURING METHOD THEREFOR
The purpose of the present invention is to provide: a high-strength steel sheet having a TS of 980 MPa or more, an El of 10% or more, and excellent toughness, flatness in the sheet width direction, and resistance to machining embrittlement; and a manufacturing method therefor. This high-strength steel sheet has a prescribed component composition. The amount of martensite is 60% or more in area fraction, and the amount of retained austenite is 3% to 15%, inclusive, in volume fraction at a position at 1/4 of the plate thickness. The sum of the amount of ferrite and the amount of bainitic ferrite is more than 10% in area fraction, and the average value of the occupancy of packets having the maximum occupancy in the prior austenite grains is 70% or less in area fraction.
A method for producing chromium-containing molten steel from a raw material including a chromium-containing raw material includes a first step in which a slag basicity before rough decarburization by oxygen blowing is adjusted to be not less than 1.5 and not more than 3.0, a slag basicity after rough decarburization by oxygen blowing is adjusted to be not less than 2.0 and not more than 3.5, and then tapping is performed while slag containing a chromium oxide generated by the oxygen blowing is made to remain in the furnace, and a second step in which the slag containing a chromium oxide made to remain is reduced by using a carbon source or a metal source newly added into the same furnace so that chromium is recovered into molten steel. The slag basicity is determined by dividing a CaO concentration by an SiO2 concentration on a mass basis in the slag.
Provided are a steel sheet dehydrogenation device, a system for manufacturing a steel sheet, and a method for manufacturing a steel sheet, with which it is possible to manufacture a steel sheet having exceptional hydrogen embrittlement resistance characteristics without changing the mechanical characteristics of the steel sheet. This dehydrogenation device has: a housing part in which a steel sheet coil, obtained by winding a steel strip into a coil shape, is housed; and a magnetic field application device for applying a steady magnetic field along the sheet width direction of the steel sheet coil housed in the housing part.
22; holding the steel sheet after the oxidation step for at least 20 s in a reduction atmosphere having a hydrogen concentration that is greater than 8 vol% and at most 30 vol%, at 700°C or higher; holding the steel sheet for 20-300 s, inclusive, in an isothermal atmosphere having a hydrogen concentration of 0.2-8 vol%, inclusive, at 750°C or higher; cooling the steel sheet; immersing the steel sheet in a molten zinc bath to obtain a hot-dip galvanized steel sheet; performing an alloying process on the hot-dip galvanized steel sheet to obtain a hot-dip galvannealed steel sheet; and, after cooling the hot-dip galvannealed steel sheet to a cooling stop temperature that is at most a Ms point, holding the steel sheet for at least 30 s at a temperature that is at least the cooling stop temperature and is 100-450°C, inclusive, in a reheating atmosphere having a hydrogen concentration of at most 0.2 vol%.
The purpose of the present invention is to provide a resistance spot-welded joint and a method for producing the same. In a resistance spot-welded joint according to the present invention, at least one of two or more steel plates has a tensile strength of 980 MPa or higher, a region within a heat-affected zone of a resistance spot welded portion formed on a steel plate side where a total value of area fractions of tempered martensite, tempered bainite, and residual austenite in a steel plate structure has the highest value Xmax is set to a first region, a heat-affected zone structure in the first region is formed of ferrite having an area fraction of 40% or less and one or two or more residual structures selected from the group consisting of the tempered martensite, the tempered bainite, and the residual austenite, and a width D of the first region satisfies expression (1). (1): D ≥ 2.40 × exp(−0.025×Xmax)
22222 as the balance. In addition, the hydrogen concentration is adjusted such that the hydrogen concentration in the first reduction annealing at the front stage is higher than the hydrogen concentration in the second reduction annealing at the rear stage.
The present invention provides an electric resistance welded pipe having, in order to increase a fit property of an inner pipe and an outer pipe when the electric resistance welded pipe is used as the outer pipe, a reduced protruding height of cutting marks on an inner surface side of the outer pipe achieved by weld bead cutting on the inner surface side only once and superior toughness of the welded portion. The electric resistance welded pipe has the welded portion along the longitudinal direction of this pipe, the maximum value of a thickness distribution of the welded portion is not more than 1.05 times of an average thickness of the electric resistance welded pipe, the width of the welded metal in the circumferential direction in the welded portion is 1 μm-800 μm inclusive over the entire thickness of the electric resistance welded pipe, and a ratio (maximum value/minimum value) of the maximum value to the minimum value of the width of the welded metal is 1.0-2.5 inclusive.
The purpose of the present invention is to provide: a high-strength steel sheet which has a TS of 1,180 MPa or more, while having excellent bendability, excellent flatness in the sheet width direction and excellent processing embrittlement resistance characteristics; and a method for producing this high-strength steel sheet. The present invention provides a high-strength steel sheet which has a specific component composition, wherein at a position corresponding to 1/4 the sheet thickness: the amount of martensite is 80% or more in area fractions; the amount of residual austenite is 3% to 15% in volume fractions; the total amount of ferrite and bainitic ferrite is 10% or less in area fractions; the average crystal grain size of prior austenite is 20 µm or less; and the average of the occupancies of packets having the maximum occupancy in prior austenite grains is 70% or less in area fractions.
The purpose of the present invention is to provide: a high-strength steel sheet which has a TS of 980 MPa or more, while having excellent press moldability, excellent flatness in the sheet width direction and excellent processing embrittlement resistance characteristics; and a method for producing this high-strength steel sheet. The present invention provides a high-strength steel sheet which has a specific component composition, wherein at a position corresponding to 1/4 the sheet thickness: the amount of tempered martensite is not less than 38% but less than 90% in area fractions; the amount of residual austenite is less than 3% in volume fractions; the total amount of ferrite and bainitic ferrite is 10% to 60% in area fractions; the average crystal grain size of prior austenite is 20 µm or less; and the average of the occupancies of packets having the maximum occupancy in prior austenite grains is 70% or less in area fractions.
The purpose of the present invention is to provide a high strength steel sheet and a method for manufacturing the same, the high strength steel sheet having the TS of more than or equal to 1180 MPa and the YR of more than or equal to 85%, and having excellent width-direction flatness and anti-working embrittlement property. This high strength steel sheet comprises a predetermined component composition, wherein, at a 1/4 plate-thickness position, the amount of tempered martensite is more than or equal to 90% in area fraction, the amount of retained austenite is less than 3% in volume fraction, the total of the amount of ferrite and the amount of bainitic ferrite is less than 10% in area fraction, the average crystal grain size of prior austenite is less than or equal to 20 μm, and the average value of the occupancies of packets having a maximum occupancy in the prior austenite grains is less than or equal to 70% in area fraction.
An object is to closely observe, by means of images of a camera having high performance specifications, changes in a structure due to heating or cooling of the structure to a temperature beyond a service temperature limit of the camera having high performance specifications and returning from that temperature to room temperature. A structure observation device includes: a camera case of a rectangular three-dimensional shape, having a glass window of heat-resistant and/or cold-resistant glass on at least one side of the three-dimensional shape; heat insulating walls covering the camera case except for the glass window; a fluid supply port and a fluid discharge port through which a cooling or warming fluid is circulated into; and a camera that is disposed inside the camera case and captures a still image or a moving image through the glass window and externally outputs or internally stores data of the captured image.
G03B 17/55 - APPAREILS OU DISPOSITIONS POUR PRENDRE DES PHOTOGRAPHIES, POUR LES PROJETER OU LES VISIONNER; APPAREILS OU DISPOSITIONS UTILISANT DES TECHNIQUES ANALOGUES UTILISANT D'AUTRES ONDES QUE DES ONDES OPTIQUES; LEURS ACCESSOIRES - Parties constitutives des appareils ou corps d'appareils; Leurs accessoires avec des dispositions pour chauffer ou réfrigérer, p.ex. avion
Provided is a surface-treated zinc-plated steel sheet which exhibits excellent delayed fracture resistance in a low temperature environment regardless of the composition of a base steel sheet, and which can be produced at low cost. This surface-treated zinc-plated steel sheet has: a steel sheet having a tensile strength of 1180 MPa or more; a zinc plating layer formed on at least one surface of the steel sheet; and a coating film formed on the zinc plating layer. The coating film contains additives at a quantity of 10-50 mass% in terms of solid content. Here, the additives are at least one type selected from the group consisting of: salts of aliphatic dicarboxylic acids having 2-8 carbon atoms and alkylamines having 6-18 carbon atoms; salts of aliphatic dicarboxylic acids having 2-8 carbon atoms and cycloalkylamines having 6-18 carbon atoms; and salts of aromatic monocarboxylic acids having 7-12 carbon atoms and alkylamines having 6-18 carbon atoms.
C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
22.
DESIGN METHOD, DEVICE, AND PROGRAM FOR PRESS FORMING, AND METHOD FOR MANUFACTURING PRESS FORMED ARTICLES
A design method for press forming, according to the present invention, is a method capable of lowering a press forming load, and includes: a forming model creation step S1; a forming model stiffness distribution setting step S3; a press forming load acquisition step S5, a press forming load determination step S7; and a press forming design stiffness determination step S9 in which the forming model stiffness distribution is determined as a press forming design stiffness distribution, when it was determined that the press forming load is within a predetermined press forming load range during the press forming load determination step S7.
G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
B21D 22/00 - Mise en forme sans coupage, par estampage, repoussage ou emboutissage
Provided is a cause inference device for inferring the cause of a phenomenon in a process, the cause inference device comprising: a knowledge model acquisition means that acquires a knowledge model representing a causal relationship between phenomena in a process by a network connecting nodes each being a phenomenon that occurs in the process; an information creation means that creates information including at least a phenomenon abnormality indicator on the basis of data collected from the process; a data association means that associates a node of the knowledge model with corresponding information; and a cause inference means that infers and presents the cause of a phenomenon on the basis of the structure of the knowledge model and the information associated with the node.
Provided is a cause inference device comprising: a knowledge model acquisition means that acquires a knowledge model; an information creation means that creates information including at least a phenomenon abnormality indicator on the basis of data collected from a process; a node extraction means that uses the name of the data collected from the process to search node information of the knowledge model and extract a corresponding node; a data association means that associates the extracted node with corresponding information; and a cause inference means that infers and presents the cause of a phenomenon on the basis of the structure of the knowledge model and the information associated with the node.
According to the present invention, it is possible to obtain a grain-oriented electromagnetic steel sheet containing a predetermined composition and comprising a forsterite coating film having high peel resistance for processing with a smaller bending radius, even in an inhibitor-less component system, by positioning one or both of the peak intensities of Ti and Nb obtained through GDS analysis on the iron side at a thickness greater than 1/2 of the thickness of the forsterite coating film.
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
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. The method includes 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
G01N 3/54 - Exécution de tests à des températures élevées ou basses
A hot-pressed member having a specified chemical composition in which Ti/Sb 2.0≤Ti/Sb≤20.0 is satisfied and a method for producing the hot-pressed member. The hot-pressed member has a microstructure in which a volume fraction of martensite is 95% or more, an average grain size of prior austenite is 7 μm or less, the number of cementite grains with a grain size of 0.10 μm or more is 2 grains/μm2 or more, and the number of Ti-based carbide grains with a grain size of 0.10 μm or less is 0.20 grains/μm2 or more, and a tensile strength of 2100 MPa or higher.
Provided are: a method for circulating an iron-based electroplating solution that can stably produce an iron-based electroplating solution with high electrolysis efficiency, no sludge contamination, and power saving without requiring a large facility; a method for manufacturing an iron-based electroplating solution; and a method for manufacturing an alloyed hot-dip galvanized steel sheet. The method for circulating an iron-based electroplating solution involves circulating and adjusting an iron-based electroplating solution (P) used in an electroplating cell (10) for iron-based electroplating. The iron-based electroplating solution (P) used in the electroplating cell (10) is passed through and treated in at least a reduction tank (30), a vertical centrifugal solid-liquid separator (40), and a final adjustment tank (50) in this order and then introduced into the electroplating cell (10). In the reduction tank (30), an iron source for reduction is added in accordance with the Fe3+ (Fe trivalent ion) concentration in the iron-based electroplating solution (P) transferred to the reduction tank (30).
The present invention provides a hot-pressed member which has excellent corrosion resistance after coating and excellent corrosion resistance in a joined part. This hot-pressed member comprises a steel material, an Al-Fe intermetallic compound layer that is arranged on at least one surface of the steel material and has a thickness of 10-30 µm, and Mg-containing oxide particles that are arranged on the Al-Fe intermetallic compound layer; and the Mg-containing oxide particles have an average particle diameter of 5.0 µm or less and a number density of 1,000 per mm2 or more.
Provided is a double-side friction stir welding method of metal sheets or metal plates to each other, and a double-side friction stir device for performing the double-side friction stir welding. According to the present invention, a pair of rotating tools facing each other is respectively arranged on a top-surface side and a bottom-surface side of a butted portion or an overlapping portion, which comprises a joint portion of two metal sheets or two metal plates, the pair of rotating tools is moved in a welding direction while being rotated at the butted portion or the overlapping portion, and while the metal sheets or the metal plates are softened by frictional heat generated between the rotating tools and the metal sheets or the metal plates, softened parts are stirred by the rotating tools to produce a plastic flow to join the metal sheets or the metal plates to each other.
B23K 20/12 - Soudage non électrique par percussion ou par une autre forme de pression, avec ou sans chauffage, p.ex. revêtement ou placage la chaleur étant produite par friction; Soudage par friction
31.
HIGH-STRENGTH ELECTROGALVANNEALED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME
Provided are a high-strength electrogalvannealed steel sheet that has a TS of 780 MPa or higher and a method for manufacturing the high-strength electrogalvannealed steel sheet. The high-strength electrogalvannealed steel sheet has a composition including, in terms of % by mass, C: 0.030% or more and 0.250% or less, Si: 0.01% or more and 3.00% or less, Mn: 1.00% or more and 10.00% or less, P: 0.001% or more and 0.100% or less, and S: 0.0001% or more and 0.0200% or less, with the balance being Fe and unavoidable impurities. The steel sheet has an electrogalvannealed coating layer on a surface thereof. The electrogalvannealed coating layer has an Fe content of 8.0% to 15.0%. The steel sheet has a tensile strength of 780 MPa or higher. The steel sheet has a diffusible hydrogen content of 0.2 wt. ppm or less.
Provided is an iron-based powder for dust core with which a dust core with low iron loss and high insulation properties can be obtained. In the iron-based powder for dust core of the present disclosure, a median particle size calculated based on cumulative volume frequency of particles of the iron-based powder for dust core is 150 μm or less, and cumulative volume frequency of the particles with an aspect ratio of 0.70 or less is 70% or less, and a median aspect ratio calculated based on cumulative volume frequency is 0.60 or more.
H01F 1/20 - 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
H01F 27/255 - Noyaux magnétiques fabriqués à partir de particules
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
33.
METHOD FOR PRODUCING ULTRA-LOW CARBON STEEL PRODUCT
A method for producing an ultra-low carbon steel product having a carbon concentration of 0.005% by mass or less includes, at least, a step of adjusting a carbon concentration of molten iron to obtain molten steel, a step of casting the molten steel into a slab, and a step of hot rolling the slab to obtain a hot-rolled steel sheet, in which the method further includes a width reduction step of performing width reduction on the slab with a reduction amount which is predetermined in accordance with the slab width in a direction orthogonal to the rolling direction of the slab.
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
34.
CARBONACEOUS SUBSTANCE-COATED GRAPHITE PARTICLES, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY
Provided are carbonaceous substance-coated graphite particles that include: graphite particles; and carbonaceous coatings covering at least part of surfaces of the graphite particles, the carbonaceous substance-coated graphite particles have a maximum particle diameter of 30.0 to 90.0 μm, a pore volume Vs of pores with a pore size of 7.8 to 36.0 nm is 0.009 to 0.164 cm3/g, and in a pore size distribution graph with the pore size being plotted on a horizontal axis and a dV/dP value obtained by differentiating the pore volume with the pore size being plotted on a vertical axis, a pore size Pmax with which the dV/dP value is maximized is 2.5 to 5.5 nm.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p.ex. batteries à insertion ou intercalation de lithium dans les deux électrodes; Batteries à l'ion lithium
H01M 4/133 - PROCÉDÉS OU MOYENS POUR LA CONVERSION DIRECTE DE L'ÉNERGIE CHIMIQUE EN ÉNERGIE ÉLECTRIQUE, p.ex. BATTERIES Électrodes Électrodes composées d'un ou comprenant un matériau actif Électrodes pour accumulateurs à électrolyte non aqueux, p.ex. pour accumulateurs au lithium; Leurs procédés de fabrication Électrodes à base de matériau carboné, p.ex. composés d'intercalation du graphite ou CFx
H01M 4/587 - Matériau carboné, p.ex. composés au graphite d'intercalation ou CFx pour insérer ou intercaler des métaux légers
One purpose of the present invention is to provide an organic resin-coated steel sheet on which molding that is complicated and difficult to be conducted through press molding is to be performed, and which has a small sliding resistance in a portion that has a risk of cracking during a press molding process, while having excellent press moldability in a portion that is to be subjected to a high surface pressure and is expected to experience the occurrence of mold galling. In cases where this organic resin-coated steel sheet is used as a steel sheet for automobiles, it is necessary for this organic resin-coated steel sheet to have film removability that is adequate for an alkaline degreasing process in a coating process, and it is also necessary to have excellent weldability. Another purpose of the present invention for such cases is to provide this organic resin-coated steel sheet which additionally has adequate film removability and excellent weldability. The present invention provides an organic resin-coated steel sheet which has an organic resin coating film on at least one surface with an average coating amount per one surface of 0.2 g/m2to 2.0 g/m2after drying, while having a thin film part, in which the coating amount of the organic resin coating film is 0.14 g/m2 or less, in an area ratio of 25.0% or less.
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 15/18 - Produits stratifiés composés essentiellement de métal comportant du fer ou de l'acier
C23C 26/00 - Revêtements non prévus par les groupes
36.
SOLIDIFICATION POSITION MEASUREMENT DEVICE, SOLIDIFICATION POSITION MEASUREMENT METHOD, METAL MATERIAL QUALITY MANAGEMENT METHOD, CASTING EQUIPMENT, METAL MATERIAL MANUFACTURING EQUIPMENT, AND METAL MATERIAL MANUFACTURING METHOD
The purpose of the present invention is to prevent breakage and burning of an electromagnetic ultrasonic sensor due to a lift-off decrease caused by fluctuation of cast slab thickness and to prevent sensitivity deterioration of the electromagnetic ultrasonic sensor due to a lift-off increase, thereby making it possible to measure a cast slab solidification position continuously and automatically. The present invention is provided with: electromagnetic ultrasonic sensors 7, 8 installed outside a cast slab 1; a sensor lifting and lowering means for adjusting a gap between the cast slab 1 and the electromagnetic ultrasonic sensor 7; a gap measurement means for measuring the gap between the cast slab 1 and the electromagnetic ultrasonic sensor 7; a measurement means for estimating the solidification position in the cast slab 1 from an output of the electromagnetic ultrasonic sensor 7; and a driving control means for controlling driving of the sensor lifting and lowering means and the gap measurement means. The driving control means controls, on the basis of the gap measured by the gap measurement means, the position of the electromagnetic ultrasonic sensor 7 by means of the sensor lifting and lowering means.
Provided is a coating material that is for use in direct-reduction iron production, and that does not inhibit carburizing of obtained reduced iron. The coating material has a material containing iron oxide, and a coating layer containing particles adhering to the surface of the material. The particles contain at least one selected from the group consisting of calcium compounds and cements, and have a particle size of at least 0.010 mm. The particle size of the particles is preferably at least 0.050 mm. The adhered amount of the particles is preferably 0.10-3.00 mass% with respect to the material. The calcium compounds preferably include at least one selected from the group consisting of calcium oxide and calcium hydroxide.
C21B 13/00 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs
39.
METHOD FOR PREDICTING MOLTEN IRON TEMPERATURE IN BLAST FURNACE, METHOD FOR TRAINING MOLTEN IRON TEMPERATURE PREDICTION MODEL FOR BLAST FURNACE, METHOD FOR OPERATING BLAST FURNACE, MOLTEN IRON TEMPERATURE PREDICTION DEVICE FOR BLAST FURNACE, MOLTEN IRON TEMPERATURE PREDICTION SYSTEM, AND TERMINAL DEVICE
This method for predicting a molten iron temperature in a blast furnace is executed by a device constituted of a computer, and comprises: an image conversion process step in which an image conversion process unit provided in the computer converts temperature data of a furnace body into a two-dimensional image; and a molten iron temperature prediction process step in which a molten iron temperature prediction process unit provided in the computer inputs, to a molten iron temperature prediction model that has been trained with the image data output in the image conversion process step as input data and the molten iron temperature as output data, image data that is output in the image conversion process step with respect to the current temperature data of the furnace body, to thereby output a future molten iron temperature.
A galvanized steel sheet including a steel sheet having a chemical composition with an equivalent carbon content Ceq of 0.60% or more and less than 0.85%, and a specified steel microstructure; and a galvanized layer on a surface of the steel sheet. The retained austenite has a solute C content of 0.6% or more by mass, and retained austenite grains with an aspect ratio of less than 2.0 constitute 50% or more of all retained austenite grains. In 90-degree bending at a curvature radius/thickness ratio of 4.2 in a rolling (L) direction with respect to an axis extending in a width (C) direction, an L cross section in a 0- to 50-µm region from a surface of the steel sheet on a compression side has a number density of voids of 1500 /mm2 or less, and the galvanized steel sheet has a tensile strength of 980 MPa or more.
Provided is spherically-shaped coated graphite exhibiting excellent cycle capacity-maintaining property when used as a negative electrode material for a lithium ion secondary battery. The spherically-shaped coated graphite includes: spherically-shaped graphite in which primary particles with an equivalent spherical diameter of not more than 0.8 μm have a volume ratio of more than 40.0% and not more than 70.0%, and primary particles with an equivalent spherical diameter of not less than 1.5 μm and not more than 3.0 μm have a volume ratio of not less than 3.0% and not more than 17.0%, in a particle size distribution of primary particles obtained using X-ray computed tomography; and a carbonaceous substance covering the spherically-shaped graphite, and a pore volume of pores with a pore size of 7.8 nm to 36.0 nm is not more than 0.017 cm3/g, and a mass of infiltrated dibutyl phthalate is less than 0.70 g/cm3.
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p.ex. batteries à insertion ou intercalation de lithium dans les deux électrodes; Batteries à l'ion lithium
H01M 4/583 - Matériau carboné, p.ex. composés au graphite d'intercalation ou CFx
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
42.
CARBONACEOUS SUBSTANCE-COATED GRAPHITE PARTICLES, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY
Provided is carbonaceous substance-coated graphite particles that exhibit excellent battery properties when used as a negative electrode material for a lithium ion secondary battery. The carbonaceous substance-coated graphite particles includes: graphite particles; and carbonaceous coatings covering at least part of surfaces of the graphite particles, and the carbonaceous substance-coated graphite particles have a specific surface area SBET determined by BET method of 4.0 to 15.0 m2/g, and a pore volume Vs of pores with a pore size of 7.8 to 36.0 nm is 0.001 to 0.026 cm3/g, and in a pore size distribution graph with the pore size being plotted on a horizontal axis and a dV/dP value obtained by differentiating the pore volume with the pore size being plotted on a vertical axis, a pore size Pmax with which the dV/dP value is maximized is 2.5 to 5.5 nm.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p.ex. batteries à insertion ou intercalation de lithium dans les deux électrodes; Batteries à l'ion lithium
H01M 4/133 - PROCÉDÉS OU MOYENS POUR LA CONVERSION DIRECTE DE L'ÉNERGIE CHIMIQUE EN ÉNERGIE ÉLECTRIQUE, p.ex. BATTERIES Électrodes Électrodes composées d'un ou comprenant un matériau actif Électrodes pour accumulateurs à électrolyte non aqueux, p.ex. pour accumulateurs au lithium; Leurs procédés de fabrication Électrodes à base de matériau carboné, p.ex. composés d'intercalation du graphite ou CFx
H01M 4/587 - Matériau carboné, p.ex. composés au graphite d'intercalation ou CFx pour insérer ou intercaler des métaux légers
METHOD FOR DESIGNING COLLISION PERFORMANCE EVALUATION TEST DEVICE FOR VEHICLE BODY COMPONENT, COLLISION PERFORMANCE EVALUATION TEST DEVICE FOR VEHICLE BODY COMPONENT, AND COLLISION PERFORMANCE EVALUATION TEST METHOD FOR VEHICLE BODY COMPONENT
The present invention provides a collision performance evaluation test device for achieving a component collision test that appropriately reproduces a state of an actual vehicle body collision. Provided is a method for designing a collision performance evaluation test device for a vehicle body component, the method comprising: an actual-vehicle physical quantity analyzing step for using actual-vehicle collision analysis to obtain a physical quantity at a boundary portion of vehicle body component and thereby obtaining an actual-vehicle boundary-portion physical quantity database; a resistance-generating material modeling step for using a machine test and computer simulation to generate an analytical model of a resistance-generating material for reproducing a motion control condition of the boundary portion; and a partial-structure-test designing step for designing a partial-structure-test structure that includes a structure of the resistance-generating material so that the physical quantity at the boundary portion in a partial structure test gradually approaches the physical quantity at the boundary portion in the actual-vehicle collision analysis.
The present invention achieves further improvement in frequency of edge chipping and thereby increases yield in steel sheet production. In the present invention, lubricant oil is directly applied on a steel sheet (1) prior to trimming. As a result, the frequency of edge chipping of a trimmer is reduced, by eliminating shortage of supply of oil and reducing friction. Specifically, this method is for producing a steel sheet (1) and comprises a process for cutting edges of the steel sheet (1) by means of rotary blades (2). In the process for cutting the steel sheet (1) with the rotary blades (2), lubricant oil is adhered to, in the surfaces (1a, 1b) of the steel sheet (1) before being cut, locations to be cut by the rotary blades (2).
B23D 19/06 - Machines à cisailler ou dispositifs de cisaillage taillant au moyen de disques rotatifs ayant des disques de cisaillage rotatifs disposés par paires travaillant conjointement avec plusieurs paires de disques de cisaillage espacées travaillant simultanément, p.ex. pour rogner ou fabriquer des bandes
B23Q 11/10 - Dispositions pour le refroidissement ou la lubrification des outils ou des pièces travaillées
45.
STEEL SHEET, PLATED STEEL SHEET, PRESS-MOLDED ARTICLE, PROCESSED MEMBER, PRODUCTION METHOD FOR PRESS-MOLDED ARTICLE, AND PRODUCTION METHOD FOR PROCESSED MEMBER
The purpose of the present invention is to effectively inhibit the occurrence of delayed fracture at a shear end surface of a member in which there is a concern regarding occurrence of delayed fracture in a press-molded article obtained by using a high-strength steel sheet or a plated steel sheet including the high-strength steel sheet as a base sheet. This steel sheet has, on a surface thereof, a coating containing an organic resin and an inorganic material. In the coating, the concentration of the inorganic material in a 20%-coating region on the steel sheet side in the thickness direction is higher than the concentration of the inorganic material in a 20%-coating region on the surface layer side. The steel sheet has a tensile strength of at least 1180 MPa.
C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
C25D 5/26 - Dépôt sur des surfaces métalliques auxquelles un revêtement ne peut être facilement appliqué sur des surfaces de fer ou d'acier
C25D 7/00 - Dépôt électrochimique caractérisé par l'objet à revêtir
C09D 5/00 - Compositions de revêtement, p.ex. peintures, vernis ou vernis-laques, caractérisées par leur nature physique ou par les effets produits; Apprêts en pâte
46.
HALBACH ARRAY MAGNET, ELECTROMAGNETIC ULTRASONIC SENSOR, DEFECT MEASURING DEVICE, DEFECT MEASURING METHOD, METAL MATERIAL MANUFACTURING METHOD, METAL MATERIAL QUALITY MANAGING METHOD, METAL MATERIAL MANUFACTURING FACILITY, SOLIDIFICATION POSITION MEASURING DEVICE, SOLIDIFICATION POSITION MEASURING METHOD, AND CASTING FACILITY
The purpose of the present invention is to provide a Halbach array magnet, an electromagnetic ultrasonic sensor, a defect measuring device, a defect measuring method, a metal material manufacturing method, a metal material quality managing method, a metal material manufacturing facility, a solidification position measuring device, a solidification position measuring method, and a casting facility that make it possible, even when subjected to repeated thermal load or under a water-cooled environment, to fix in place each of arrayed magnets and to ensure reliability and sensor life. This Halbach array magnet comprises: a magnet portion in which a plurality of magnets are arranged in a Halbach array; a fixing jig which is one or a plurality of non-magnetic bodies that fix each of the magnets of the magnet portion; and a yoke 4 which is a magnetic body and is provided on a surface side different from a side on which a magnetic field created by the magnet portion is deviated.
The present invention provides a method for producing a hot metal, the method being capable of producing a hot metal by charging a recovered C source, as a carbonaceous material-containing agglomerated ore, through the throat of a shaft furnace, while circulating a C source in a process. The present invention provides a method for producing a hot metal, the method comprising: a first step in which a carbonaceous material-containing agglomerated ore is produced from an iron-containing starting material and a carbon-containing starting material; a second step in which a hot metal is produced by reducing and melting the carbonaceous material-containing agglomerated ore by blowing an oxygen-containing gas thereinto; and a third step in which carbon is recovered by bringing a carbon-containing gas, which is generated as a by-product by the reduction and contains carbon monoxide and carbon dioxide, into contact with a porous material. With respect to this method for producing a hot metal, the carbon recovered in the third step is used as a part or the entirety of the carbon-containing starting material in the first step. Instead of the second step, this method for producing a hot metal may have: a reduction step in which reduced iron is obtained by heating the carbonaceous material-containing agglomerated ore to 1160-1450°C for reducing and melting the carbonaceous material-containing agglomerated ore, and subsequently cooling the carbonaceous material-containing agglomerated ore; and a melting step in which a hot metal is produced by melting the reduced iron.
Proposed are a method for manufacturing a carbonaceous material-containing agglomerate ore and a method for manufacturing molten pig iron, with which a highly reducible source material can be obtained and the quantity of reducing material that is used in the manufacture of molten pig iron in a countercurrent moving bed can be reduced. A method for manufacturing a carbonaceous material-containing agglomerate ore according to the present invention includes a step in which carbon-including gas that includes carbon monoxide is brought into contact with a porous material to recover carbon, and an agglomeration step in which a carbon-including source material that includes said carbon is mixed with an iron-including source material and the result is agglomerated.
The present invention easily and accurately determines the conveyance state of an object being conveyed by a belt. A belt conveyance state detection device (9) for detecting the conveyance state of a belt (3) of a belt conveyor (1) that conveys an object to be conveyed comprises: an end position detector (10) that detects the width direction positions of both ends of the belt (3) in the width direction in a top view; an apparent width calculator (12) that calculates an apparent width (WX), which is the width of the belt (3) in the top view, from the width direction positions detected by the end position detector (10); and a state detector (13) that determines the conveyance state of the object being conveyed by the belt (3) from the calculated apparent width (WX).
B65G 43/08 - Dispositifs de commande actionnés par l'alimentation, le déplacement ou le déchargement des objets ou matériaux
B65G 15/08 - Transporteurs comportant des surfaces porteuses de charges sans fin, c. à d. des tapis roulants ou autres systèmes équivalents, auxquelles l'effort de traction est transmis par des moyens différents des éléments d'entraînement sans fin de même config la surface portant la charge étant formée par une courroie concave ou tubulaire, p.ex. une courroie formant auget
B65G 43/02 - Dispositifs de commande, p.ex. de sécurité, d'alarme ou de correction des erreurs détectant une condition physique dangereuse des porte-charges, p.ex. pour stopper l'entraînement en cas d'échauffement
50.
CONVEYANCE STATE DETECTION DEVICE AND CONVEYANCE STATE DETECTION METHOD
The present invention makes it possible to automatically detect the conveyance state of a conveyed object on a belt. Provided is a conveyance state detection device (21) which detects the conveyance state of a raw material (2) on a belt (3) conveyed by a belt conveyor (1), said conveyance state detection device (21) comprising: an imaging device that images, from above, the belt (3) which conveys a conveyed object; and a conveyance state detection unit (10) that detects the conveyance state of the raw material (2) on the belt (3) by performing image processing on an image captured by the imaging device.
B65G 43/08 - Dispositifs de commande actionnés par l'alimentation, le déplacement ou le déchargement des objets ou matériaux
B65G 15/08 - Transporteurs comportant des surfaces porteuses de charges sans fin, c. à d. des tapis roulants ou autres systèmes équivalents, auxquelles l'effort de traction est transmis par des moyens différents des éléments d'entraînement sans fin de même config la surface portant la charge étant formée par une courroie concave ou tubulaire, p.ex. une courroie formant auget
Provided is a coal grinding method for a coal grinding apparatus 1 that grinds coal conveyed by a plurality of conveyors installed. The coal grinding apparatus 1 comprises, for each of the plurality of conveyors, at least one blending tank 10, a grinding mill 20, and a sensor 30 disposed along the conveyor. The coal grinding method includes a step for cutting out a predetermined amount of coal with the at least one blending tank 10, a step for crushing the cut out coal with the grinding mill 20, a step for detecting the grain size of crushed coal with the sensor 30, and a step for adjusting the grinding strength of each grinding mill 20 of a plurality of grinding mills 20 on the basis of the grain size of coal detected by the sensor 30 such that the grain size of coal converged after being crushed by the plurality of grinding mills 20 is a target grain size.
Provided is a hot-dip Al-Zn plated steel sheet that has excellent corrosion resistance in a stable manner with certainty. The hot-dip Al-Zn plated steel sheet according to the present invention comprises a plating film and is characterized in that the plating film has a compositional makeup containing 45-65 mass% of Al and 1.0-4.0 mass% of Si, the remaining portion being Zn and unavoidable impurities, and the Ni content in the unavoidable impurities is 0.010 mass% or less with respect to the total mass of the plating film.
C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
53.
METHOD, DEVICE, AND PROGRAM FOR PERFORMING ANALYZING OPTIMIZATION OF LOAD-TRANSMITTING STRUCTURE IN VEHICLE BODY SKELETON COMPONENT OF AUTOMOTIVE VEHICLE, AS WELL AS METHOD FOR MANUFACTURING LOAD-TRANSMITTING MEMBER IN VEHICLE BODY SKELETON COMPONENT OF AUTOMOTIVE VEHICLE
A device for analyzing optimization of a load-transmitting member in a vehicle body skeleton component of an automotive vehicle according to the present invention, the device performing the following processes when setting analysis conditions for analyzing optimization (21): setting of an impact load input site 121 and a plurality of load transmission sites 123 in a vehicle body skeleton component of an optimization analysis model 120 (21a); distribution of the impact load to a plurality of withstand-load components at or below a withstand load and determination of a transmission load at each of the load transmission sites (21b); setting of a load condition for setting the determined transmission loads as impact load counterforces acting on the load transmission sites 123, and a constraint condition for constraining displacement of the impact load input site 121 (21c); and setting of a prescribed target function and a limitation condition under which displacements of the plurality of load transmission sites 123 are equal as optimization analysis conditions (21d).
G06F 30/20 - Optimisation, vérification ou simulation de l’objet conçu
B62D 65/00 - Tracé, fabrication, p.ex. assemblage, mesures pour faciliter le désassemblage, ou modification de la structure des véhicules à moteurs ou des remorques, non prévus ailleurs
G06F 30/15 - Conception de véhicules, d’aéronefs ou d’embarcations
54.
STEEL SHEET AND METHOD FOR MANUFACTURING STEEL SHEET
The present invention provides a steel sheet which exhibits excellent ammonia stress corrosion cracking properties, low-temperature toughness of a base material, toughness of HAZ, strength characteristics, and in which reductions in flatness are suppressed, and a method for manufacturing the same. This steel sheet has a predetermined component composition, and in particular, is configured such that: Ti/N is 2.00-4.00, and the equation 169 ≤ 5158 × Ti +25563 × N ≤ 360 is satisfied; the carbon equivalent (Ceq) of the component composition is 0.340-0.390; the volume fraction of the sum of ferrite and pearlite of a microstructure at a position at 1/4 of the sheet thickness is 90% or more; the average particle diameter of the ferrite is 5-20 μm; the yield strength of the steel sheet is 440 MPa or less, and the tensile strength is 490 MPa or more; the maximum value of the gap between the steel sheet surface and a 2 m long ruler is 14 mm or less when the long ruler is applied to the steel sheet surface along the rolling direction; and the sheet thickness is less than 13 mm.
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 38/14 - Alliages ferreux, p.ex. aciers alliés contenant du titane ou du zirconium
C22C 38/58 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
55.
THREE-PHASED THREE-LEGGED WOUND CORE AND METHOD FOR MANUFACTURING SAME
Provided is a three-phased three-legged wound core that has a reduced transformer core loss and exhibits excellent magnetic properties without using two or more kinds of materials having different magnetic properties. The three-phased three-legged wound core comprises two adjacent inner cores that are each composed of a grain-oriented electrical steel sheet as the raw material, and one outer core that surrounds the two inner cores, wherein: each of the two inner cores and the one outer core has a flat surface portion and a corner portion adjacent to the flat surface portion, the flat surface portion having a lap portion and the corner portion having a bend portion, the corner portions of the two inner cores and the one outer core each having bend portions at two locations, the bend portions at the two locations forming an angle of more than or equal to 30°; and the grain-oriented electrical steel sheet has a magnetic flux density B8 of 1.84T to 1.92T, inclusive, when the strength H of the magnetic field is 800 A/m.
H01F 27/245 - Noyaux magnétiques fabriqués à partir de tôles, p.ex. à grains orientés
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
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
56.
THREE-PHASE TRIPOD IRON CORE AND MANUFACTURING METHOD THEREFOR
Provided is a three-phase tripod iron core which has excellent magnetic characteristics and has a low transformer iron loss without using two or more kinds of materials having different magnetic characteristics. This three-phase tripod iron core comprises: two inner core parts which are formed from a grain‐oriented electrical steel sheet, as a material, and are adjoining each other; and one outer core part which surrounds the two inner core parts. The two inner core parts and the one outer core part each have a planar section and a corner section adjoining the planar section, the planar section has a lap portion, and the corner section has bending portions. The corner sections of the two inner core parts and the one outer core part each have two bending portions, and the angle formed between the two bending portions is 55° or less. The grain‐oriented electrical steel sheet has a magnetic flux density B8 of 1.92-1.98 T when the magnetic field strength H is 800 A/m.
H01F 27/245 - Noyaux magnétiques fabriqués à partir de tôles, p.ex. à grains orientés
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
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
57.
RAIL HAVING EXCELLENT FATIGUE CRACK PROPAGATION RESISTANCE CHARACTERISTICS, AND METHOD OF PRODUCING SAME
A rail has excellent fatigue crack propagation resistance characteristics, wherein the rail has a component composition including C: 0.80 to 1.30 mass %, Si: 0.10 to 1.20 mass %, Mn: 0.20 to 1.80 mass %, P: not more than 0.035 mass %, S: 0.0005 to 0.012 mass %, Cr: 0.20 to 2.50 mass % and the remainder being Fe and inevitable impurities and satisfying CP represented by equation (1) being not more than 2500:
A rail has excellent fatigue crack propagation resistance characteristics, wherein the rail has a component composition including C: 0.80 to 1.30 mass %, Si: 0.10 to 1.20 mass %, Mn: 0.20 to 1.80 mass %, P: not more than 0.035 mass %, S: 0.0005 to 0.012 mass %, Cr: 0.20 to 2.50 mass % and the remainder being Fe and inevitable impurities and satisfying CP represented by equation (1) being not more than 2500:
CP=X/RA (1) and
A rail has excellent fatigue crack propagation resistance characteristics, wherein the rail has a component composition including C: 0.80 to 1.30 mass %, Si: 0.10 to 1.20 mass %, Mn: 0.20 to 1.80 mass %, P: not more than 0.035 mass %, S: 0.0005 to 0.012 mass %, Cr: 0.20 to 2.50 mass % and the remainder being Fe and inevitable impurities and satisfying CP represented by equation (1) being not more than 2500:
CP=X/RA (1) and
X={(10×[% C])+([% Si]/12)+([% Mn]/24)+([% Cr]/21)}5 (2),
A rail has excellent fatigue crack propagation resistance characteristics, wherein the rail has a component composition including C: 0.80 to 1.30 mass %, Si: 0.10 to 1.20 mass %, Mn: 0.20 to 1.80 mass %, P: not more than 0.035 mass %, S: 0.0005 to 0.012 mass %, Cr: 0.20 to 2.50 mass % and the remainder being Fe and inevitable impurities and satisfying CP represented by equation (1) being not more than 2500:
CP=X/RA (1) and
X={(10×[% C])+([% Si]/12)+([% Mn]/24)+([% Cr]/21)}5 (2),
where [% Y] is content of an element Y (mass %), and RA is a prior austenite grain size (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 38/38 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et plus de 1,5% en poids de manganèse
An optimization analysis method includes: a joining candidate setting process of setting a joining candidate at a position that is a candidate for joining the parts assembly; a fixed joining selection process of selecting four or more fixed joining points or fixed joining areas to be necessarily joined for each parts assembly from among the joining candidates set for each parts assembly; and a joining optimization analysis process of setting, in the automotive body model, the fixed joining point or the fixed joining area selected for each parts assembly without being a target of the optimization analysis and an optimal joining candidate to be a target of the optimization analysis, and performing an optimization analysis of obtaining an optimized joining point or joining area that joins the parts assembly in the automotive body model excluding the fixed joining point or the fixed joining area selected for each parts assembly.
G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
G06F 30/15 - Conception de véhicules, d’aéronefs ou d’embarcations
59.
REMOTE OPERATING SYSTEM AND REMOTE OPERATING METHOD
This remote operating system 1 comprises: an operating unit 12 that accepts an operation from an operator; a manipulator 22 on which a grinding member 4 for grinding a workpiece 7 is mounted; and a control device 30 that moves the manipulator 22 in response to a movement input by the operator on the operating unit 12, and provides, to the operating unit 12, feedback of a reaction received by the manipulator 22.
B24B 27/00 - Autres machines ou dispositifs à meuler
B24B 27/033 - Autres machines ou dispositifs à meuler pour le meulage d'une surface à des fins de nettoyage, p.ex. pour décalaminer ou corriger par meulage des défauts de la surface
B24B 49/16 - Appareillage de mesure ou de calibrage pour la commande du mouvement d'avance de l'outil de meulage ou de la pièce à meuler; Agencements de l'appareillage d'indication ou de mesure, p.ex. pour indiquer le début de l'opération de meulage tenant compte de la pression de travail
B25J 3/00 - Manipulateurs de type à commande asservie, c. à d. manipulateurs dans lesquels l'unité de commande et l'unité commandée exécutent des mouvements correspondants dans l'espace
B25J 9/06 - Manipulateurs à commande programmée caractérisés par des bras à articulations multiples
B25J 9/12 - Manipulateurs à commande programmée caractérisés par des moyens pour régler la position des éléments manipulateurs électriques
B25J 13/08 - Commandes pour manipulateurs au moyens de dispositifs sensibles, p.ex. à la vue ou au toucher
60.
SURFACE INSPECTION METHOD FOR METAL MATERIAL, SURFACE INSPECTION APPARATUS FOR METAL MATERIAL, AND METAL MATERIAL
A surface inspection method for a metal material according to the present invention is a surface inspection method for a metal material of optically detecting a surface defect of the metal material, the surface inspection method including: an irradiation step for irradiating a surface of a metal material with light; an image-capturing step for capturing images of reflected light from the surface of the metal material by the light irradiated in the irradiation step in two or more different wavelength bands to acquire a plurality of images; and a detection step for detecting a surface defect existing on the surface of the metal material from information of relative signal strength between the plurality of images obtained at the same position on the surface of the metal material in the image-capturing step.
G01N 21/892 - Recherche de la présence de criques, de défauts ou de souillures dans un matériau mobile, p.ex. du papier, des textiles caractérisée par la crique, le défaut ou la caractéristique de l'objet examiné
The present invention provides a steel sheet which exibits excellent ammonia stress corrosion cracking properties, low-temperature toughness and strength characteristics, and in which reductions in flatness are suppressed, and a method for manufacturing the same. This steel sheet has a predetermined component composition, and is configured such that: the carbon equivalent (Ceq) of the component composition is 0.340-0.390; the volume fraction of the sum of ferrite and pearlite of the microstructure at a position at 1/4 of the sheet thickness is 90% or more; the average particle diameter of the ferrite is 5-20 μm; the yield strength of the steel sheet is 440 MPa or less and the tensile strength is 490 MPa or more; the maximum value of the gap between the steel sheet surface and a 2 m long ruler is 14 mm or less when the long ruler is applied to the steel sheet surface along the rolling direction; and the sheet thickness is less than 13 mm.
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 provides a means for suppressing propagation of edge cracking. The present invention provides a method for producing a grain-oriented electromagnetic steel sheet, the method comprising a step in which after hot rolling a silicon-containing steel slab, cold rolling is performed on the hot-rolled silicon-containing steel slab once, or two or more times with process annealing carried out therebetween, the cold-rolled silicon-containing steel slab is subjected to decarburization annealing, and after being applied with an annealing separator, the silicon-containing steel slab is wound into a coil and is subjected to finish annealing, and subsequently to flattening annealing. With respect to this method for producing a grain-oriented electromagnetic steel sheet, when the coil is introduced into a finish annealing furnace, a local strain having an indentation amount of 5 µm to 30 µm from the steel sheet surface is applied to a linear region which continuously or discontinuously extends in a direction that intersects the axial direction of the coil and is apart from an end of the coil in the axial direction, the end being in contact with a coil stage of the finish annealing furnace, by 5 mm to 20 mm in the axial direction, and the finish annealing is subsequently performed, thereby growing crystal grains that have a misorientation angle of 15 degrees or more from a Goss-oriented grain in 50% or more of the entire length of the linear region.
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
A method of producing a ferritic stainless steel sheet comprises subjecting an Al vapor deposited layer-equipped stainless steel sheet to a heat treatment at 600° C. to 1300° C. for 1 minute or more. The Al vapor deposited layer-equipped stainless steel sheet comprises a ferritic stainless steel and an Al vapor deposited layer thereon. The ferritic stainless steel sheet has a thickness of 100 μm or less and a chemical composition containing, in mass %, C: ≤0.030%, Si: ≤1.0%, Mn: ≤1.0%, P: ≤0.040%, S: ≤0.010%, Cr: 11.0-30.0%, Al: 4.0-6.5%, Ni: 0.05-0.50%, Mo: 0.01-6.0%, N: ≤0.020% s, and Zr: 0.01-0.20% and/or Hf: 0.01-0.20%, with a balance consisting of Fe and inevitable impurities. A thickness of the Al vapor deposited layer per one side is 0.5-10.0 μm.
C22C 38/42 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/44 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/46 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/48 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
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
C23C 14/16 - Matériau métallique, bore ou silicium sur des substrats métalliques, en bore ou en silicium
64.
STEEL SHEET, MEMBER, METHODS FOR MANUFACTURING SAME, METHOD FOR MANUFACTURING HOT-ROLLED STEEL SHEET FOR COLD-ROLLED STEEL SHEET, AND METHOD FOR MANUFACTURING COLD-ROLLED STEEL SHEET
voidvoid/NF) of ferrite grains having voids at interfaces with respect to all ferrite grains is 15% or less in an L cross-section in a 0-50 μm range from the steel sheet surface on the compression-tensile deformed side. The steel sheet has a tensile strength of 780 MPa or more.
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
Provided is a method for operating a blast furnace, whereby it becomes possible to further reduce the amount of carbon dioxide discharged from the blast furnace under stable operation of the blast furnace. A regenerated organic substance is added to a reducing agent to be blown into the blast furnace, and the regenerated organic substance is produced using hydrogen and at least one of carbon monoxide and carbon dioxide in the blast furnace gas which is discharged from the blast furnace and has a heat generation amount Q of 4000 kJ/kg or more.
C21B 5/00 - Fabrication de la fonte brute dans les hauts fourneaux
C07C 29/151 - Préparation de composés comportant des groupes hydroxyle ou O-métal liés à un atome de carbone ne faisant pas partie d'un cycle aromatique à six chaînons par réduction exclusivement des oxydes de carbone avec de l'hydrogène ou des gaz contenant de l'hydrogène
C21B 5/06 - Utilisation des gaz de sortie des hauts fourneaux
F27D 17/00 - Dispositions pour l'utilisation des chaleurs perdues; Dispositions pour l'utilisation ou pour l'élimination des gaz usés
66.
STEEL SHEET, MEMBER, METHODS FOR PRODUCING THESE, METHOD FOR PRODUCING HOT-ROLLED STEEL SHEET FOR COLD-ROLLED STEEL SHEET, AND METHOD FOR PRODUCING COLD-ROLLED STEEL SHEET
voidvoid/NF) of ferrite grains having a void at the interface to all ferrite grains is 5% or less in an L cross-section within a region that is 0-50 µm apart from the compressive/tensile deformation-side steel sheet surface; and the tensile strength is not less than 440 MPa but less than 780 MPa.
A transport vehicle includes at least one antenna, at least one satellite positioning receiver configured to receive positional information via the antenna, at least one antenna support member including an antenna attachment portion with the antenna attached thereto and a vehicle body connector connected to the vehicle body, and a vehicle position estimator configured to estimate a vehicle position of the transport vehicle using the positional information received by the satellite positioning receiver. The antenna support member is configured to move between at least one use state, in which the antenna is disposed at at least one use position at a predetermined distance above a loading surface of the cargo bed, and a stored state in which the antenna is disposed below the use position.
An element, a friction element welding method, and a method for producing a friction element welded joint. The element is for performing friction element welding on a sheet stack of two or more stacked metal sheets by pressing the element into the sheet stack while the element is rotated. The element includes a circular columnar mandrel that is to enter the sheet stack, a circular collar disposed at an upper end portion of the mandrel, a first conical body extending from a lower end surface of the mandrel, and a second conical body disposed on the lower side of the first conical body. The vertical angle β of the second conical body and the vertical angle α of the first conical body satisfy the relation β<α.
B23K 20/12 - Soudage non électrique par percussion ou par une autre forme de pression, avec ou sans chauffage, p.ex. revêtement ou placage la chaleur étant produite par friction; Soudage par friction
69.
STEEL SHEET, MEMBER AND METHODS FOR PRODUCING THESE
The present invention provides: a steel sheet which has excellent material uniformity and high strength; a member; a method for producing this steel sheet; and a method for producing this member. The present invention provides a steel sheet which has a component composition that contains, in mass%, 0.10% to 0.30% of C, 0.01% to 3.0% of Si, 1.0% to 3.5% of Mn, 0.002% to 0.100% of P, 0.0002% to 0.0200% of S, 0.20% or less (excluding 0%) of sol. Al, 0.010% or less of N and 0.008% to 0.10% of Ti, with the balance being made up of Fe and unavoidable impurities, while having a steel sheet structure that comprises, in area ratios, 5% to 50% of ferrite and 50% to 95% of martensite and bainite in total. With respect to this steel sheet, the area ratio of non-recrystallized ferrite among the ferrite is 0% to 10% relative to the whole structure; and the difference between the maximum value and the minimum value of the area ratio of non-recrystallized ferrite in the sheet width direction of the steel sheet is 5% or less.
Provided is a submerged arc welding method that makes it possible to achieve excellent mechanical characteristics and high productivity when thick steel sheets for shipbuilding, construction, or the like are to undergo high-heat-input welding. Also provided are a welded joint produced using the welding method and a production method for the welded joint. According to the present invention, a one-sided submerged arc welding method for welding two abutting steel sheets (1a, 1b) involves forming grooves on the front surface side and the back surface side of the steel sheets, forming root surfaces (3a, 3b) between the groove on the front surface side and the groove on the back surface side, and welding from the front surface side. The root surface height (r) is preferably 2–5 mm, and the groove depth (k) on the back surface side is preferably 2–5 mm.
Provided is a galvanized steel sheet which has excellent press moldability and a good external surface appearance after coating, and in which die galling leading to breakage of a molded article during press molding is suitably inhibited without having to form a lubricating film such as a zinc phosphate-based film on the surface. The surface of the galvanized steel sheet is configured such that: the arithmetic mean roughness Ra is 0.5-2.5 μm; the surface has recess and projection portions; the projection portions have flat portions; for every 25 mm in a straight line, there are, between the projection portions, 50 to less than 100 valley portions in which the width of the valley is at least 0.1 mm and the maximum depth of the valley is at least 2.0 μm; and for every 2.5 mm in a straight line, there are less than 20 recesses and projections having a height of at least 0.3 μm on the flat portions of the projection portions.
22 emission and enables stable operation regardless of fluctuations in various conditions, in a process for reducing fine iron ore by means of a fluidized-bed reduction furnace and a smelting reduction furnace. Provided is a method for reducing fine iron ore, the method comprising: a fluidized-bed reduction step in which fine iron ore is fluidized and reduced with a first reducing gas in a fluidized-bed reduction furnace to obtain partially-reduced iron; and a smelting reduction step in which the partially-reduced iron is reduced with a second reducing gas in a smelting reduction furnace, wherein the fluidized-bed reduction furnace top gas discharged from the top of the fluidized-bed reduction furnace is used for synthesizing methane and reforming methane-containing gas.
Provided is a high-strength steel sheet having excellent low-temperature toughness and resistance to ammonia SCC, the steel sheet being provided to a storage tank, or similar, that is used to accommodate a liquefied gas in an energy transport vessel. This steel sheet has a specific component composition which contains in particular one or more of Cu: 0.01-05%, Cr: 0.01-1.0%, Sb: 0.01-0.50% and Sn: 0.01-0.50%, the content of Cu, Cr, Sb and Sn satisfying a specific relationship. Said steel sheet has: a hardness property wherein the hardness at a position at a depth of 1.0 mm from the surface of the steel sheet is Hv300 or less; and a metal structure in which, at a position equal to half the sheet thickness of the steel sheet, the volume fraction of bainite structure is 20% or more, and the total volume fraction of ferrite structure and bainite structure is 60% or more.
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 provides a high-strength steel sheet which has exceptional ammonia SCC resistance and low-temperature toughness, and is used for a storage tank in which a liquefied gas is stored in an energy transport ship, or the like. This steel sheet has a specific component composition and hardness characteristics such that the average hardness is Hv 210 or less at a depth of 0.5 mm from the steel sheet surface and the variation of the average hardness is Hv 50 or less, while having a metal structure which has a volume ratio of bainite structure of 90% or more at a depth of 0.5 mm from the steel sheet surface, while having a volume ratio of bainite structure of 20% or more and a total volume ratio of ferrite structure and bainite structure of 60% or more at 1/2 the sheet thickness 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 high-strength steel plate which has excellent ammonia SCC resistance and low-temperature toughness, and is used for storage tanks for storing liquefied gas in energy transport ships. The steel plate: has a predetermined composition; has hardness properties in which the average hardness is 230 HV0.1 or less and the hardness variation is 30 HV0.1 or less at a depth of 0.5 mm from the surface of the steel plate, the maximum hardness in the plate thickness direction is at a position of 1.0 mm or more and 1/4 or less of the plate thickness from the surface of the steel plate, and the hardness variation in the plate thickness direction is 70 HV1 or less; and has a metal structure in which the volume fraction of a bainite structure at a depth of 0.5 mm from the surface of the steel plate is 90% or more.
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 continuous annealing line capable of producing a steel sheet excellent in hydrogen embrittlement resistance. A continuous annealing line 100 comprises: a payoff reel 10 configured to uncoil a cold-rolled coil C to feed a cold-rolled steel sheet S; an annealing furnace 20 configured to continuously anneal the cold-rolled steel sheet S and including a heating zone 22, a soaking zone 24, and a cooling zone 26 that are arranged from an upstream side in a sheet passing direction; a downstream line 30 configured to continuously pass the cold-rolled steel sheet S discharged from the annealing furnace 20 therethrough; a tension reel 50 configured to coil the cold-rolled steel sheet S; and a sound wave irradiator 60 configured to irradiate the cold-rolled steel sheet S being passed from the cooling zone 26 to the tension reel 50 with sound waves.
C21D 1/04 - Procédés ou dispositifs généraux pour le traitement thermique, p.ex. recuit, durcissement, trempe ou revenu avec application simultanée d'ondes supersoniques, de champs magnétiques ou électriques
C21D 6/00 - Traitement thermique des alliages ferreux
A shearing work technology of metal sheets, such as high-strength steel sheets, is excellent in stretch flange crack resistance and delayed fracture resistance of the sheared end surface. A metal sheet shearing work method including: applying double shearing work to an end portion of at least one part of the metal sheet; and forming a first area having a cutting margin of a second shearing work of 5 mm or less in first cutting in the double shearing work. Second cutting in the double shearing work is carried out in a state where the movement on an end portion side of the first area is restrained. For example, by providing projection areas continuous to the first area and restraining the projection areas, the movement on the end portion side of the first area is restrained.
The present invention provides a method for producing a grain-oriented electromagnetic steel sheet, the method preventing the occurrence of a secondary recrystallization defect at the edges of a product sheet in the sheet width direction, while effectively suppressing the occurrence of edge cracking during hot rolling. According to this method for producing a grain-oriented electromagnetic steel sheet, a grain-oriented electromagnetic steel sheet is produced by subjecting a steel slab that contains an inhibitor forming component to heating, hot rolling, hot rolled sheet annealing if necessary, cold rolling, primary recrystallization annealing that doubles as decarburization annealing, and finish annealing after application of an annealing separator. In the heating step of the steel slab in this method, after being heated to a temperature of 900°C to 1300°C, the steel slab is subjected to edging of 50 mm to 200 mm per one side and to horizontal rolling, and is subsequently re-heated, while controlling the temperature of the slab after the horizontal rolling so that if Tc (°C) is the surface temperature of the center part in the width direction, Te (°C) is the surface temperature of the edges in the width direction, and R (°C/s) is the average heating rate in the sheet width direction over the range from 700°C to 900°C in a heating process in which the steel sheet after the hot rolling is subjected to the first annealing, the relational expression R ≥ 5 + (Tc - Te)/20 is satisfied.
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
Proposed is a manufacturing method for obtaining a grain-oriented electrical steel sheet that achieves an improvement in magnetic flux density in materials using an inhibitor. With respect to a steel slab having a predetermined composition, a predetermined relationship between the temperature at the end of rough rolling by hot rolling and the time from the end of rough rolling to the start of finish rolling is satisfied, and the time taken for the temperature to reach 900 °C from 600 °C is set to be at most 50 seconds.
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
The present invention provides a grain-oriented electromagnetic steel sheet having good film adhesion. One or both of S and Se elements among the elements present at the grain boundary between ceramic particles contained in a base film of the grain-oriented electromagnetic steel sheet are in the range of 0.02-2.00 at%.
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
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 seamless steel pipe has a t/Dout of 0.05 to 0.40, where t is a wall thickness (mm) of the seamless steel pipe, and Dout is an outside diameter (mm) of the seamless steel pipe. The seamless steel pipe has a maximum depth dmax (mm)≤0.350 mm for defects in an inner surface of the steel pipe on a cross section perpendicular to a pipe axis. The seamless steel pipe has an average defect depth dave (mm)≤0.200 mm for defects having a depth of 0.050 mm or more in the inner surface of the steel pipe. The seamless steel pipe, per millimeter of an inner circumferential length of the pipe, has at most 30 defects having a depth of 0.050 mm or more in the inner surface of the steel pipe.
Provided is an iron-based mixed powder for powder metallurgy that has excellent compressibility and with which it is possible to produce, even by a common production process in which the molding pressure is below 600 MPa, a sintered body having a tensile strength of 1200 MPa or above and excellent impact resistance. The iron-based mixed powder for powder metallurgy comprises a partially diffused alloyed steel powder in which Mo is diffusely adhered to the particle surface of an iron-based powder, and a metal powder for alloying, the iron-based powder having a prescribed component composition, the Mo content of the partially diffused alloyed steel powder being 0.20-1.5 mass% inclusive, the partially diffused alloyed steel powder having an apparent density of 2.8 g/cm3to 3.6 g/cm3 inclusive, and the metal powder for alloying containing, at a prescribed addition amount, a Cu powder and/or an Ni powder having a prescribed apparent density.
HAHAHA by the length L of boundaries having a misorientation angle of 20° to 50°, of 2.0 or more; and the ceramic particles have a melting point of 2000°C or more.
Provided is a stainless steel powder from which it is possible to manufacture a stainless steel member having excellent high temperature yield strength and oxidation resistance. This stainless steel powder has a component composition that contains, in mass%, 0.20% or less of C, 2.0% or less of Si, 2.0% or less of Mn, 0.040% or less of P, 0.010% or less of S, 18.0-35.0% of Cr, 1.0% or less of Ni, 0.50-4.0% of Cu, 0.7-3.0% of Nb, 6.0% or less of Mo, 6.0% or less of W, 0.030% or less of N, and 0.10% or less of O, and that satisfies formula (1), the remaining portion being Fe and unavoidable impurities. (1): (Mo+W)≥2.0, wherein Mo and W in formula (1) are the contained amounts (mass%) of Mo and W, respectively.
Provided is a method of easily producing a non-oriented electrical steel sheet that contains substantially no Al and contains large amounts of Si and Mn and has low iron loss, comprising hot rolling a slab having a specified chemical composition to obtain a hot-rolled sheet; coiling the hot-rolled sheet; cold rolling the hot-rolled sheet once or twice with intermediate annealing being performed therebetween, to obtain a cold-rolled sheet; and subjecting the cold-rolled sheet to final annealing, wherein the hot-rolled sheet after the hot rolling is cooled at an average cooling rate from 800° C. to 650° C. of 30° C./s or more, and thereafter the coiling is performed at 650° C. 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
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
C21D 9/68 - Fours de bobinage; Appareils bobineurs à chaud
An inspection device includes multiple magnetic sensors, wiring for calibration and a controller. The wiring for calibration is arranged at the same relative position with respect to a magnetically sensitive portion of each of the multiple magnetic sensors. The controller obtains a first output value of each of the multiple magnetic sensors in advance. Before a predetermined portion of an electrical steel sheet passes the position of the magnetic sensors, the controller retracts the multiple magnetic sensors. The controller starts applying a current to the wiring for calibration. The controller obtains a second output value of each of the multiple magnetic sensors. After the predetermined position passes, the controller displaces the multiple magnetic sensors to the detection position. The controller corrects a measurement value measured by each of the multiple magnetic sensors based on the first output value and the second output value.
G01N 27/83 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la présence des criques en étudiant des champs magnétiques de dispersion
Provided is a resistance spot welding method suitable for manufacturing a weld joint exhibiting excellent delayed fracture resistance. The resistance spot welding method includes sandwiching two or more overlapped steel sheets between a pair of welding electrodes, applying current to the steel sheets while pressing the steel sheets, forming a nugget on overlapping surfaces of the steel sheets to join the steel sheets, and after the joining, directly or indirectly irradiating the nugget with sound waves having a frequency of 10 Hz or more and 100000 Hz or less so that a sound pressure level on a surface of the steel sheet is 30 dB or more.
B23K 31/02 - 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 relatifs au brasage ou au soudage
B23K 31/12 - 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 relatifs à la recherche des propriétés, p.ex. de soudabilité, des matériaux
89.
LASER BEAM WELDING METHOD, WELDING MACHINE FOR SAME, AND BUTT WELDED JOINT
The present invention proposes a laser beam welding method, and provides a welding machine employed in the method and a welded joint obtained using the method, with which, when performing laser beam welding to melt and join abutted steel plates by radiating a laser beam while supplying a filler into a gap portion between the abutted steel plates to cause the filler to melt and solidify, thereby forming welded metal, it is possible for a high-quality butt laser welded joint to be obtained in a stable manner even if the width of a gap between the abutting steel plates is large or if the width of the gap varies in a plate width direction, by radiating the laser beam while causing the laser beam to rotate across a gap portion between the steel plates, and controlling a supply quantity per unit time of the filler supplied into the gap portion such that a ratio thereof to a volume of the gap between the steel plates welded per unit time falls within a predetermined range.
The present invention provides a steel sheet for hot pressing, the steel sheet being prevented from the generation of scales due to a coating layer and being reduced in adhesion of a metal to heating facilities, thereby preventing liquid metal embrittlement cracking during hot pressing and achieving excellent corrosion resistance after coating. The present invention provides a steel sheet for hot pressing, the steel sheet comprising a base steel sheet and coating layers which are provided on both surfaces of the base steel sheet and have a thickness of 7 to 20 µm, wherein: the coating layers are formed of Ni or an Ni-based alloy; and the Zn content in the coating layers is 0 to 10% by mass.
C25D 5/26 - Dépôt sur des surfaces métalliques auxquelles un revêtement ne peut être facilement appliqué sur des surfaces de fer ou d'acier
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
C21D 1/18 - Durcissement; Trempe avec ou sans revenu ultérieur
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 19/03 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel
C22C 19/05 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel avec du chrome
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 2/04 - Procédés de trempage à chaud ou d'immersion pour appliquer le matériau de revêtement à l'état fondu sans modifier la forme de l'objet immergé; Appareils à cet effet caractérisé par le matériau de revêtement
C23C 14/00 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement
C25D 3/12 - Dépôt électrochimique; Bains utilisés à partir de solutions de nickel ou de cobalt
C25D 3/56 - Dépôt électrochimique; Bains utilisés à partir de solutions d'alliages
C25D 5/50 - Post-traitement des surfaces revêtues de métaux par voie électrolytique par traitement thermique
91.
AUTOMOTIVE CRASHWORTHINESS ENERGY ABSORPTION PART, AND METHOD FOR MANUFACTURING AUTOMOTIVE CRASHWORTHINESS ENERGY ABSORPTION PART
An automotive crashworthiness energy absorption part includes a tubular member formed by using a hat-shaped section part including a top portion and a side-wall portion; a coating part made of a material having a lower strength than the tubular member, the coating part being arranged on outer surfaces of the top portion and the side-wall portion at a portion including a corner portion configured to connect the top portion and the side-wall portion, with a gap of 0.2 mm or more and 3 mm or less from the outer surface of the top portion, the outer surface of the side-wall portion, and an outer surface of the corner portion; and a coating film of an electrodeposition paint formed in the gap.
This press-molding method and press-molded article manufacturing method are for molding a press-molded article 1 comprising a top plate section 3 that has a convex outer peripheral edge section 3a where an outer peripheral edge or a part thereof is convexly curved outward, a vertical wall section 5 that is continuous with the top plate section 3 via a punch shoulder R section 23, and a flange section 7 that is continuous with the vertical wall section 5 via a die shoulder R section 25, wherein said methods include a first molding step in which a metal plate is molded into an intermediate molded article 17, and a second molding step in which the intermediate molded article 17 molded in the first molding step is molded into a press-molded article 1 of a target shape, and in the first molding step, the molding is performed so that the radius of curvature of the die shoulder R section 25, which is formed so as to correspond to at least the convex outer peripheral edge section of the top plate section 3 of the intermediate molded article 17, is greater than the radius of curvature of the die shoulder R section 25 of the press-molded article 1 of the target shape.
This steel pipe end processing device processes the pipe end of a steel pipe, and comprises: two support rolls that support the steel pipe from below while contacting the outer peripheral surface of the steel pipe end; a single inner surface press roll that applies pressure to the steel pipe end from the inner peripheral surface of the steel pipe end at an intermediate position between the two support rolls; two outer surface press rolls that apply pressure to the steel pipe end from above while contacting the outer peripheral surface of the steel pipe end; and a rotation drive means for rotating the steel pipe.
Provided are a resistance spot-welded joint and a resistance spot welding method. The present invention is a resistance spot-welded joint in which two or more steel sheets, including at least one high-strength steel sheet, are welded together, wherein: the high-strength steel sheet has a specific component composition; in a welded portion, the nugget diameter and the width of a softened section within a heat-affected section satisfy the relationship in formula (2), and the hardness X of the most-softened section within the heat-affected section and the hardness of a parent material in the high-strength steel sheet satisfy the relationship in formula (3); and the total average numeric density of NbC, TiC, and VC having a grain diameter of 100 nm or less within the heat-affected section is 80/μm2 or greater. Formula (2): (width of softened section within heat-affected section (mm)) > (nugget diameter (mm)) × 0.2; Formula (3): (X (HV)) < (hardness of parent material in high-strength steel sheet (HV)) × 0.95
Provided is a method of manufacturing a grain-oriented electrical steel sheet that has a uniform texture all along the longitudinal direction and has small fluctuations in magnetic properties. The method includes subjecting a predetermined hot-rolled and annealed sheet to cold rolling, where at least one time of cold rolling has a total rolling reduction of 80 % or more and is performed by a tandem mill, rolling performed in at least one stand of the tandem mill is performed under conditions of a rolling reduction of 30 % or more and a biting temperature To °C of a work roll of the stand, and a temperature at which either or both of a leading end and a tail end of the hot-rolled and annealed sheet are bitten by the work roll is 70° C. or higher and at least 10° C. higher than the temperature To °C.
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
96.
METHOD FOR CONTROLLING HOT METAL TEMPERATURE, OPERATION GUIDANCE METHOD, METHOD FOR OPERATING BLAST FURNACE, METHOD FOR PRODUCING HOT METAL, DEVICE FOR CONTROLLING HOT METAL TEMPERATURE, AND OPERATION GUIDANCE DEVICE
A method for controlling a hot metal temperature, includes: a first control loop for calculating a target value of pulverized coal ratio such that a hot metal temperature, predicted by a physical model that is able to calculate conditions inside a blast furnace, falls within a preset target range; and a second control loop for calculating pulverized coal flow rate manipulation quantity to compensate for a deviation between the pulverized coal ratio target value and a current pulverized coal ratio actual value.
Provided is a technology which is for straight polarity MAG-welding and by which not only occurrence of sputtering is reduced but also an excellent bead shape is obtained when performing MAG-welding. This welding wire is to be used for straight polarity MAG-welding, has a compositional makeup comprising, in mass%, 0.020-0.080% of C, 0.50-0.97% of Si, 1.50-2.00% of Mn, 0.001-0.050% of P, 0.001-0.025% of S, 0.10-0.30% of Ti, 0.010-0.050% of Al, 0.05-0.20% of Cr, 0.01-0.10% of Ni, 0.05-0.30% of Mo, not more than 0.0016% of Ca, 0.020-0.055% of REM, 0.0005-0.0030% of B, and not more than 0.0100% of N, the remaining portion being Fe and unavoidable impurities, and, as necessary, contains at least one selected from not more than 0.050% of Nb, not more than 0.050% of V, not more than 0.300% of Zr, and not more than 0.0150% of K.
Provided is a non-oriented electromagnetic steel sheet that offers low high-frequency iron loss without the addition of a large amount of an alloy element such as Cr for reducing magnetic flux density and without reducing the sheet thickness and thereby decreasing productivity. The non-oriented electromagnetic steel sheet has a predetermined component composition including 0.0005-0.0050 mass% of Co, the amount of N present as AlN in at least one surface in the range from the surface to a depth of 1/20 of the sheet thickness is 0.003 mass% or less, and the surface includes an oxide layer that contains one or both of Al and Si and has a thickness of 80-200 nm.
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 non-oriented electromagnetic steel sheet having low iron loss at high frequencies without the addition of a large amount of an alloy element such as Cr, which would reduce magnetic flux density, and without a reduction in the sheet thickness, which would reduce productivity. This non-oriented electromagnetic steel sheet has a prescribed component composition including 0.0005-0.0050 mass% of Co, wherein: the amount of N present as AlN in at least one surface, in the range from the surface to a depth of 1/20 of the sheet thickness, is no more than 0.003 mass%; and on the surface, there is an oxide layer that contains one or both of Al and Si and has a thickness of at least 10 nm and less than 80 nm.
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
The purpose of the present invention is to suppress ridging, which presents a problem when handling steel containing a large amount of alloy elements such as Si and Al in a slow hot-rolling process. Provided is a method for manufacturing a hot-rolled steel sheet for a non-oriented electrical steel sheet including: a continuous casting step for producing a steel slab having a predetermined component composition and a thickness of 50-200 mm inclusive by a continuous casting method; a transportation step for transporting the steel slab to hot-rolling equipment while maintaining the surface temperature of the steel slab at 800°C or above; and a hot-rolling step for sequentially performing, in the hot-rolling equipment, rough rolling, a reheating treatment, and finishing rolling on the steel slab to produce a hot-rolled steel sheet, the hot-rolling step being carried out under conditions satisfying the following (1)-(4). (1) Outlet-side speed of the hot rolling: 100 mpm or below. (2) Draft in the final pass of the rough rolling: 45% or above. (3) Average temperate increase speed in the reheating treatment: 9°C/s or above. (4) Temperature increase in the reheating treatment: 30°C or above.
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
