A crash energy absorption part for an automobile is provided in a front portion or a rear portion of an automotive body and absorbing crash energy when a crash load is input from a front or a rear of the automotive body, and includes: a top portion; a tubular member including a side wall portion continuous with the top portion via a shoulder part of a punch; and a resin applied or patched to at least an inner surface of the shoulder part of a punch of the tubular member. The resin has a thickness gradually changing in an axial direction from one end side toward other end side, a thickest portion of the thickness is 8 mm or less, and the resin is bonded to the inner surface with an adhesive strength of 10 MPa or more and is axially crushed when the crash load is input.
B62D 21/15 - Châssis, c. à d. armature sur laquelle une carrosserie peut être montée comportant des moyens amortisseurs de chocs, p.ex. châssis conçus pour changer de forme ou de dimensions d'une façon définitive ou temporaire à la suite d'une collision avec un autre corps
B60R 19/34 - Aménagements concernant le montage des pare-chocs sur les véhicules comprenant des moyens de montage susceptibles de céder conçus pour être détruits à l'impact, p.ex. du type pare-chocs global
2.
METHOD FOR PRODUCING MOLTEN IRON USING ELECTRIC FURNACE PROVIDED WITH VIDEO DEVICE
To reduce production costs by increasing molten iron heating efficiency, a production method using an electric furnace is provided with a preheating chamber, a melting chamber, a cold iron source supporter operable to partition the preheating chamber into a first and a second preheating chamber, an extruder, and a video device operable to observe the second preheating chamber is used, the method including a melting process, a heating process, a preheating process, and a tapping process are performed. In the heating process, heating of the molten iron is started after the cold iron source supporter is closed, and based on the visual information obtained via the video device of the second preheating chamber.
The present invention provides a carbonaceous material which is used for the production of a sintered ore, and is capable of preventing troubles in the exhaust gas system caused by exhaust gas processing, the troubles including, for example, the generation of tar in pipes and the occurrence of white smoke in an electric dust collector. This carbonaceous material is a solid fuel for the production of a sintered ore, and has an electrical conductivity of 1.0 × 10-9S/m or more and a volatile content (VM) of 15% or less. In cases where this carbonaceous material is composed of a plurality of kinds of carbonaceous materials, 80% or more of the plurality of kinds of carbonaceous materials have an electrical conductivity of 1.0 × 10-9 S/m or more at 80°C to 200°C, and the weighted average of the volatile contents (VM) is 15% or less.
When a steel slab containing, in mass%, 0.0050% or less of C, 2.0-5.0% of Si, 0.2-1.8% of Mn, 0.5-2.5% of Al, 0.001-0.100% of Mo, and 0.02-0.10% in total of Sn and Sb, the contents of Si, Al and Mn satisfying a predetermined relationship, is hot-rolled, hot roll-annealed, cold-rolled, and finish annealed to manufacture a non-oriented electromagnetic steel plate, the soaking temperature in the finish annealing is set to 500°C or higher and below a temperature T determined from the contents of Si, Al and Mn, the time to maintain the soaking temperature is set to 60 seconds or less, and the residence time at 500°C or higher is set to 100 seconds or less to yield a tensile strength of 700-950 MPa and a dislocation density at the center of the plate thickness of at least 1.2×1014m-2, thereby providing a non-oriented electromagnetic steel plate having high strength after finish annealing and having low core loss after strain relief annealing.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
Provided is a method for recovering nickel, cobalt, and manganese from a compound including metal oxides of nickel, cobalt, and manganese in which the concentration of manganese in recovered materials is kept low while increasing the concentrations of nickel and cobalt. The method for recovering nickel, cobalt, and manganese includes: a mixing step in which a reducing agent and a compound containing metal oxides of nickel, metal oxides of cobalt, and metal oxides of manganese are mixed and a mixture is produced; and a heating step in which the mixture is heated to obtain a first product and a second product having a higher concentration of manganese than the first product. In the mixing step, one or more substances selected from among carbon reducing agents containing carbon as a component thereof, silicon reducing agents containing silicon as a component thereof, and aluminum reducing agents containing aluminum as a component thereof are used as the reducing agent, and the reducing agent is used in an amount satisfying a predetermined range.
C22B 3/06 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés par lixiviation dans des solutions inorganiques acides
C22B 3/26 - Traitement ou purification de solutions, p.ex. de solutions obtenues par lixiviation par extraction liquide-liquide utilisant des composés organiques
H01M 10/54 - Récupération des parties utiles des accumulateurs usagés
8.
COLD ROLLING MILL ROLLING CONDITION CALCULATION METHOD, COLD ROLLING MILL ROLLING CONDITION CALCULATION DEVICE, COLD ROLLING METHOD, COLD ROLLING MILL, AND STEEL SHEET MANUFACTURING METHOD
A cold rolling mill rolling condition calculation method includes: an estimation step of estimating a rolling constraint condition with respect to a target steady rolling condition of a roll target material, by inputting second multi-dimensional data to a prediction model, the prediction model having been trained with explanatory variable and response variable, the explanatory variable being first multi-dimensional data generated based on non-steady rolling performance data, among past rolling performance in rolling a roll material by a cold rolling mill, and the response variable being steady rolling performance data and rolling constraint condition data during steady rolling, and the second multi-dimensional data having been generated based on non-steady rolling performance data of the roll target material; and a change step of changing the target steady rolling condition so that the estimated rolling constraint condition satisfies a predetermined condition.
A meandering amount arithmetically operating device of a meandering amount measurement device calculates the meandering amount of a steel sheet using a drive side edge site zds(N) and a work side edge sites zws(N) at a current time when a measurement reliability determination unit determines that both the drive side edge site zds(N) and the work side edge sites zws(N) at the current time have high reliability. When only one of the drive side edge site zds(N) and the work side edge site zws(N) at the current time is determined to have high reliability, the other edge site is calculated by interpolation using the number of pixels W from a sheet width updating unit with the drive side edge sites zds(N) or the work side edge site zws(N) at the current time having high reliability as a reference.
B21B 38/04 - Procédés ou dispositifs de mesure spécialement adaptés aux laminoirs, p.ex. détection de la position, inspection du produit pour mesurer l'épaisseur, la largeur, le diamètre ou d'autres dimensions transversales du produit
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
Provided is a method for producing an iron ore pellet, whereby it is possible to obtain a high-strength green pellet in which bursting can be suppressed. This method for producing an iron ore pellet is characterized by having a step for mixing a binder and iron ore having a total Fe content of 63% by mass to obtain a mixture, a step for granulating the mixture to obtain a green pellet, and a step for firing the green pellet to obtain an iron ore pellet, the iron ore having a core ore 10 having a grain size of more than 1 mm, and a fine ore 12 having a grain size of 1 mm or less.
Provided are: a steel sheet and a member that have tensile strength of at least 780 MPa, excellent press-moldability, ductility, and expansion flange moldability, and excellent material stability in a sheet width direction; and a method of manufacturing the steel sheet and the member. The present invention has a component composition and a steel structure with prescribed ranges. The combined surface modulus of quenched martensite and residual austenite with an aspect ratio of 3 or less and a circle-equivalent diameter of at least 2.0 μm, with respect to the total surface modulus of quenched martensite and residual austenite, is 20% or less. The surface modulus of a carbon-concentrated region where the carbon concentration is at least 0.5% by mass is 20% or less with respect to the entire structure.
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
12.
ENERGY OPERATION ASSISTANCE SYSTEM, INFORMATION PROCESSING DEVICE, DISPLAY TERMINAL DEVICE, ENERGY OPERATION ASSISTANCE METHOD, AND STEEL MILL OPERATION METHOD
2222222 optimization unit. Further, a display terminal device is provided with an information acquisition unit, an information display unit, and an output unit.
To ensure stable supply of a cold iron source to a melting chamber, a method of producing molten iron uses an electric furnace that includes: a preheating chamber; a melting chamber; an extruder located in the preheating chamber; and a video device configured to observe an inside of the melting chamber, and comprises: an extrusion process of supplying a cold iron source preheated in the preheating chamber to the melting chamber by the extruder; and a melting process of melting the cold iron source supplied to the melting chamber by arc heat to obtain molten iron, wherein in the extrusion process, a moving amount of the extruder and/or a time interval for moving the extruder is controlled based on visual information obtained from the video device.
F27B 3/28 - Aménagement des dispositifs de commande, de surveillance, d'alarme ou des dispositifs similaires
C21B 11/10 - Fabrication de la fonte brute autrement que dans les hauts fourneaux dans des fours électriques
F27B 3/18 - Aménagement des dispositifs de chargement
F27D 21/02 - Dispositifs d'observation ou d'éclairage
14.
STEEL SHEET, COATED STEEL SHEET, METHOD FOR PRODUCING HOT-ROLLED STEEL SHEET, METHOD FOR PRODUCING COLD-ROLLED FULL HARD STEEL SHEET, METHOD FOR PRODUCING HEAT-TREATED STEEL SHEET, METHOD FOR PRODUCING STEEL SHEET, AND METHOD FOR PRODUCING COATED STEEL SHEET
Disclosed herein are a method for producing a hot-rolled steel sheet, a method for producing a cold-rolled full hard steel sheet, and methods for producing a heat-treated steel sheet that serve as the methods for producing intermediate products for obtaining a steel sheet having a tensile strength of 590 MPa or more, a particular composition and a particular steel structure.
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 electric resistance welded pipe having excellent SSC resistance. This electric resistance welded pipe has an absolute value of residual stress in the circumferential direction of the pipe inner surface of 10 MPa or more and an absolute value of residual shear stress of the pipe inner surface of 300 MPa or less. The steel structure of a base material portion of the electric resistance welded pipe at the center in the thickness direction is configured such that the total of ferrite and bainite is at least 90% in terms of volume ratio, and the average crystal grain diameter is 9.0 μm or less. The steel structure at a position 0.1 mm outside of the pipe inner surface of the base material portion in the pipe radial direction is configured such that the total of ferrite and bainite is at least 95% in terms of volume ratio.
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C22C 38/58 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
B21B 1/22 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilés; Séquence des opérations dans les trains de laminoirs; Installation d'une usine de laminage, p.ex. groupement de cages; Succession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies
B21C 37/08 - Fabrication de tubes à joints soudés ou brasés
B21C 37/30 - Finition des tubes, p.ex. calibrage, polissage
A method for manufacturing a press-molded article 1 provided with at least a top plate portion 3 having a concave curved portion in a side view and a longitudinal wall portion 7 connecting from the top plate portion 3 through a punch-shoulder-radiused portion 5, the method comprising: a first molding step for press-molding an intermediate molded article 19 having an intermediate top plate portion 21 that curves in the same direction as the top plate portion 3, a step-shaped portion 17 that comprises a step formed continuous with a ridge portion 23 formed in an area corresponding to the punch-shoulder-radiused portion 5, and an outward surface portion 25 that extends outward continuous from the step-shaped portion 17 and curves in the same direction as the intermediate top plate portion 21; and a second molding step for press-molding the intermediate molded article 19 into a press-molded article 1.
Provided is a steel cast slab that contains from 2.0 mass% to less than 7.5 mass% of Ni and has few surface cracks. The steel cast slab containing Ni is composed of, in mass%, C: 0.03% to 0.10%, Si: 0.01% to 0.50%, Mn: 0.10% to 1.00%, P: 0.001% to 0.010%, S: 0.0001% to 0.0050%, Ni: 2.0% to less than 7.5%, Al: 0.010% to 0.080%, N: 0.0010% to 0.0050%, and O: 0.0005% to 0.0040%, with the remainder comprising Fe and unavoidable impurities. The density of solidified nuclei in the surface of the steel cast slab is 0.35/mm2 or more.
B22D 11/00 - Coulée continue des métaux, c. à d. en longueur indéfinie
B22D 11/108 - Alimentation en additifs, poudres ou similaires
B22D 11/12 - Accessoires pour le traitement ultérieur ou le travail sur place des barres coulées
B22D 11/16 - Commande ou régulation des opérations ou du fonctionnement
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 9/00 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet
Provided is a tundish for continuous casting that enables the purity of molten steel to be increased. This tundish for continuous casting comprises an accommodation section that retains molten steel that has been supplied. The accommodation section comprises: one or more molten steel outflow ports out of which the molten steel is allowed to flow; and a weir that is disposed more to the upstream side of the molten steel than the one or more molten steel outflow ports and that is formed in a hollow cylindrical shape. The weir includes: a base section; a wall section erected from the base section; an eave section disposed so as to cover the peripheral ridge at one end of the wall section and to oppose the base section of the weir; and a gas supply section that supplies an inert gas into an internal space surrounded by the wall section and the base section. The gas supply section includes: a porous section, in the entirety of which a plurality of pores are formed; a support section that supports the porous section and is disposed in the wall section of the weir; and piping that is disposed in the wall section of the weir, between the support section and the base section of the weir, and that discharges the inert gas.
Provided is a tundish for continuous casting that is capable of improving the cleanliness of molten steel. This tundish for continuous casting includes an accommodating portion for storing supplied molten steel. The accommodating portion includes: one or a plurality of molten steel outflow ports allowing the molten steel to flow out; and a gas supply portion which is disposed further upstream, in the direction of flow of the molten steel, than the one or plurality of molten steel outflow ports, and which supplies an inert gas into a space surrounded by the accommodating portion. The gas supply portion comprises: a porous portion which is formed in the shape of a box having a bottom portion and a wall portion, and which has a plurality of pores formed over the entirety thereof; a supporting portion which supports the porous portion and which is provided in the wall portion of the gas supply portion; and piping which is provided in the wall portion of the gas supply portion between the supporting portion and the bottom portion of the gas supply portion, and which ejects the inert gas.
SINTERING PROCESS CONTROL METHOD, OPERATION GUIDANCE METHOD, SINTERED ORE MANUFACTURING METHOD, SINTERING PROCESS CONTROL DEVICE, OPERATION GUIDANCE DEVICE, SINTERING OPERATION GUIDANCE SYSTEM, AND TERMINAL DEVICE
Provided is a sintering process control method which uses a physical model, which can calculate the state of a sintering process including a temperature distribution of a sintering raw material in the longitudinal direction and thickness direction in a sintering machine, to control the sintering process, wherein the sintering process control method comprises: a first prediction step (S2) for using the physical model to obtain first future predicted values of control variables when the current operation variables are maintained; and an operation amount calculation step (S5) for calculating an operation amount of a specific operation variable so as to reduce the difference between target values and overlapping predicted values of the control variables, which are based on the first predicted values and a step response when specific operation variables, which are a portion of the operation variables, are changed by a unit quantity.
Provided is a method that makes it possible to more easily and quantitatively obtain the surface wettability of a solid with respect to a discretionary liquid. The present invention is a method for evaluating the wettability of solid surfaces in which surfaces to be evaluated in two solids are made to face each other with a space therebetween, at least all of the bottom edge sections of the two solids are arranged so as to be present on the same plane and the result is used as a test material, an immersion test is performed in which the test material is immersed in an evaluation liquid so that all of the bottom edge section of the test material is parallel to the surface of the evaluation liquid, a wetting height which is the difference between the height of the surface of the evaluation liquid and the height of the liquid surface of the evaluation liquid entering into a gap between the two solids is measured at a discretionary immersion time, and the measured value is designated as a wettability evaluation value for the solid surfaces with respect to the evaluation liquid.
G01N 13/00 - Recherche des effets de surface ou de couche limite, p.ex. pouvoir mouillant; Recherche des effets de diffusion; Analyse des matériaux en déterminant les effets superficiels, limites ou de diffusion
Provided is a mixed powder for powder metallurgy that uses a fatty acid amide, which is a clean lubricant, and that exhibits excellent compression properties and removability of a molded article, not only at normal temperatures but also after a rise in mold temperature. The mixed powder for powder metallurgy comprises an iron-based powder and a fatty acid amide as a lubricant, wherein: the fatty acid amide includes a saturated fatty acid bisamide, a saturated fatty acid monoamide, and an unsaturated fatty acid amide; the unsaturated fatty acid amide includes an unsaturated fatty acid bisamide and/or an unsaturated fatty acid monoamide; and when the added amounts of the saturated fatty acid bisamide, the saturated fatty acid monoamide, the unsaturated fatty acid bisamide, and the unsaturated fatty acid monoamide in terms of parts by mass with respect to 100 parts by mass of the iron-based powder are represented as b1, b2, b3, and b4, respectively, the following expressions (1) to (3) are satisfied. (1): 0<(b1)+(b2)+(b3)+(b4)≤2.0 (2): 0<(b1)/(b2)<0.45 (3): 0<[(b3)+(b4)]/[(b1)+(b2)+(b3)+(b4)]≤0.35
B22F 1/10 - Poudres métalliques contenant des agents lubrifiants ou liants; Poudres métalliques contenant des matières organiques
B22F 1/00 - Poudres métalliques; Traitement des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre ou d'améliorer leurs propriétés
B22F 1/105 - Poudres métalliques contenant des agents lubrifiants ou liants; Poudres métalliques contenant des matières organiques contenant des agents lubrifiants ou liants inorganiques, p.ex. des sels métalliques
B22F 1/17 - Particules métalliques revêtues de métal
Provided are: a laser welding method to prevent cracks and obtain welded joints having excellent weld metal toughness; and a laser welded joint. This laser welding method comprises: butting steel material members together; coating the surface of the steel material including a weld line with a flux having a predetermined composition; and then performing laser welding to create a welded joint, wherein the steel material has a chemical composition containing, in mass%, 0.04-0.15% of C, 0.05-1.00% of Si, 0.50-2.50% of Mn, 0.030% or less of P, 0.020% or less of S, 0.050% or less of Al, 0.050% or less of Ti, 0.010% or less of O, and 0.008% or less of N, with the remainder comprising Fe and inevitable impurities, and having a carbon equivalent Ceq of 0.30-0.45 as expressed by equation (1). (1): Ceq=[C]+[Mn]/6+[Si]/24+[Cu]/20+[Ni]/40+[Cr]/5+[Mo]/4
Provided is a square steel pipe having excellent buckling resistance. In this square steel pipe, which has a plurality of flat portions and corner portions alternating in the pipe circumference direction, the yield strength of the flat portions in the pipe circumference direction is set to be 0.83-1.20 times the yield strength of the flat portions in the pipe axial direction, and the yield strength of the corner portions in the pipe circumference direction is set to be 0.90-1.30 times the yield strength of the flat portions in the pipe axial direction.
Provided is a resin-coated metal sheet that achieves slipperiness, scrape resistance, and ink adhesiveness with respect to a resin coating layer. This resin-coated metal sheet 1 comprises a resin coating layer 3 that is formed on at least one surface of a metal sheet 2, and that contains at least 75% by mass of a polyester resin in relation to the total resin content. The resin coating layer 3 has at least a three-layer structure including a topmost layer 3a, a middle layer 3b, and a bottommost layer 3c. The melting point of the resin coating layer 3 is 230°C to 254°C, inclusive. The topmost layer 3a contains a polyolefin. The melting point of the polyolefin is 80°C to 140°C, inclusive. When measured by Raman spectroscopy, the dispersed particle size of the polyolefin on the topmost surface and the interior in the thickness direction of the resin coating layer 3 is 0.018 µm to 5.0 µm, inclusive.
B32B 15/09 - Produits stratifiés composés essentiellement de métal comprenant un métal comme seul composant ou comme composant principal d'une couche adjacente à une autre couche d'une substance spécifique de résine synthétique comprenant des polyesters
B32B 27/36 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyesters
B65D 25/36 - Habillage ou revêtements externes formés par application d'un matériau en feuille
B65D 65/40 - Emploi de stratifiés pour des buts particuliers d'emballage
B65D 65/42 - Emploi de substances enduites ou imprégnées
26.
RESIN-COATED METAL PLATE FOR CONTAINER, AND METHOD FOR MANUFACTURING SAME
Provided is a resin-coated metal plate for a container, in which breakage of a resin coating layer in can making, and planing of the resin coating layer due to insufficient ability to slide during can making can be suppressed, and the plate has excellent adhesion to printing paint after can making. A resin-coated metal plate 1 for a container comprises a polyester resin coating layer 3 on at least one surface of a metal plate 2, the polyester resin coating layer 3 containing 0.010-1.0 mass% of an organic lubricant in which the half-value width of a peak due to C=O stretching vibration in the vicinity of 1730 cm-1is 24 cm-1to 28 cm -1, determined by laser Raman spectroscopy analysis from measurement with linearly polarized laser light having a wavelength of 532 nm incident on the surface of the polyester resin coating layer 3 with the plane of polarization of the laser light parallel to the rolling direction of the metal plate, and the contact angle of diiodomethane on the surface of the polyester resin coating layer after heat treatment for two minutes from room temperature to 240°C being 23-40°.
B32B 15/09 - Produits stratifiés composés essentiellement de métal comprenant un métal comme seul composant ou comme composant principal d'une couche adjacente à une autre couche d'une substance spécifique de résine synthétique comprenant des polyesters
B65D 25/36 - Habillage ou revêtements externes formés par application d'un matériau en feuille
27.
STEEL SHEET FOR HOT PRESSING, HOT-PRESSED MEMBER AND METHOD FOR PRODUCING HOT-PRESSED MEMBER
Provided is a steel sheet for hot pressing that has excellent rapid heating compatibility, that can prevent liquid metal embrittlement cracking, and that has excellent post-hot-pressing coating adhesion. The steel sheet for hot pressing comprises: a base steel sheet; and a coating layer which is provided on both surfaces of the base steel sheet and which has a thickness of 0.5 to 6.0 µm. The coating layer is formed of Ni or an Ni-based alloy, and the Zn content in the coating layer is 0-30 mass%.
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 14/14 - Matériau métallique, bore ou silicium
C23C 14/16 - Matériau métallique, bore ou silicium sur des substrats métalliques, en bore ou en silicium
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 5/48 - Post-traitement des surfaces revêtues de métaux par voie électrolytique
28.
HIGH-STRENGTH HOT-DIP-GALVANIZED STEEL SHEET AND PRODUCTION METHOD FOR SAME
According to the present invention, a method for producing a high-strength hot-dip-galvanized steel sheet that has at least 20 g/m2but no more than 120 g/m222 and 0.5–10.0 vol ppm of HCl, the remainder being nitrogen and unavoidable impurities. (1): Dew point X≥(-50+[Si mass%]×(T-600)/30+[Mn mass%]×(T-600)/25)
C23C 2/16 - 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 Élimination de l'excès des revêtements fondus; Commande ou régulation de l'épaisseur du revêtement en utilisant des fluides sous pression, p.ex. par des lames d'air
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 method for producing a grain-oriented electromagnetic steel sheet, the method comprising hot-rolling a steel material having a given composition, cold-rolling the hot-rolled sheet to obtain a cold-rolled sheet having a final sheet thickness, and subjecting the cold-rolled sheet to decarburization annealing serving also as primary recrystallization annealing and then to finish annealing, wherein the cold-rolling includes final cold rolling conducted by at least one pass at a steel sheet temperature in the range of 150-350°C. The decarburization annealing is conducted such that in the course of temperature rising, the cold-rolled sheet is rapidly heated from 400°C to a temperature T (°C) between 700°C and 900°C at an average heating rate of 250 °C/s or higher and that a time period of 0.10 s or longer but shorter than 1.00 s is set during which the heating rate for any temperatures between 500°C and 700°C is not higher than 2/3 the average heating rate. Thus, a grain-oriented electromagnetic steel sheet having excellent magnetic properties is produced. The rapid heating in the decarburization annealing is conducted using a transverse-type induction heater.
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 method for producing a grain-oriented electromagnetic steel sheet, the method comprising: hot-rolling a steel material to obtain a hot-rolled sheet; subjecting the hot-rolled sheet to cold rolling once or subjecting the hot-rolled sheet to cold rolling two or more times and to process annealing interposed therebetween, thereby obtaining a cold-rolled sheet having a final sheet thickness; and subjecting the cold-rolled sheet to decarburization annealing serving also as primary recrystallization annealing and then to finish annealing. The decarburization annealing is conducted such that in the course of temperature rising, the cold-rolled sheet is rapidly heated from 400°C to a temperature T (°C) between 700°C and 900°C at an average heating rate of 250 °C/s or higher and that a time period of 0.10 s or longer but shorter than 1.00 s is set during which the heating rate for any temperatures between 500°C and 700°C is not higher than 2/3 the average heating rate. Thus, a grain-oriented electromagnetic steel sheet having excellent magnetic properties is produced. The rapid heating in the decarburization annealing is conducted using a transverse-type induction heater.
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 molten iron refining method having, an auxiliary material, and an oxidizing gas supplied through a top-blowing lance, to a cold iron source and molten pig iron that are contained/fed in a converter-type vessel, and molten iron is subjected to a refining process. A pre-charged cold iron source is charged into the converter-type vessel at an amount not larger than 0.15 times. A furnace-top-added cold iron source that's part or all of the cold iron source and added from a furnace top is fed during the refining process. A burner at a leading end of the top-blowing lance that spray holes through which a fuel and a combustion-supporting gas are ejected. During the refining process, a powdery auxiliary material processed into powder that's part of the auxiliary material is blown in, to pass through a flame formed by the burner.
A method that, regarding a process of refining molten iron, can increase the thermal margin and the amount of cold iron source to be used. A burner having jetting holes for jetting a fuel and a combustion supporting gas is provided at a leading end part of one lance that top-blows an oxidizing gas to molten iron contained in a converter-type vessel, or at a leading end part of another separate lance. A powdery auxiliary raw material or an auxiliary raw material processed into a powder form that is blown into the molten iron from the one lance or the other lance passes through a flame formed by the burner. This top-blowing lance for a converter is configured to secure a predetermined heating time and powder-fuel ratio. Also, a method for adding an auxiliary raw material and a method for refining of molten iron that use this top-blowing lance.
This press-formed product manufacturing method includes: a reference press-formed product shape acquisition step for acquiring a reference press-formed product shape 5; a corrugated blank press-formed product shape acquisition step for acquiring a corrugated blank press-formed product shape 9; a first deviation amount acquisition step for obtaining a deviation amount between the reference press-formed product shape 5 and the corrugated blank press-formed product shape 9; a period-shifted corrugated blank press-formed product shape acquisition step for acquiring a period-shifted corrugated blank press-formed product shape 13; a second deviation amount acquisition step for obtaining a deviation amount between the reference press-formed product shape 5 and the period-shifted corrugated blank press-formed product shape 13; a countermeasure-requiring site identification step for identifying a countermeasure-requiring site; a convex pattern imparting step for imparting a convex pattern 23, 27 to an actual mold; and an actual press-forming step for performing press-forming using the actual mold to which the convex pattern 23, 27 has been imparted.
Provided is an iron ore pellet production method with which both suppression of bursting and strength of an iron ore pellet are achieved. This iron ore pellet production method involves a crystalline water removal treatment step for eliminating crystalline water from iron ore having an iron content ratio of 63% by mass or less to obtain dewatered ore, wherein iron ore in a state of being heated to 100°C-800°C is kept for 5-200 minutes in the crystalline water removal treatment step.
Provided are a method for producing an iron-based soft magnetic composite powder and an iron-based soft magnetic composite powder. The method for producing an iron-based soft magnetic composite powder includes a first mixing step that adds an aluminum dihydrogen tripolyphosphate dihydrate powder to an iron-based soft magnetic powder and stirs and mixes to obtain a first composite powder in which a coating layer of aluminum dihydrogen tripolyphosphate dihydrate has been formed on the surface of the iron-based soft magnetic particles. In the spectrum of the aluminum dihydrogen tripolyphosphate dihydrate powder analyzed by x-ray diffraction, the peak intensity of the (112) plane of the aluminum dihydrogen tripolyphosphate dihydrate is 1.5 times or more the peak intensity of the (102) plane of aluminum orthophosphate.
This method of controlling hot finish rolling is for hot finish rolling coordinated control that controls a rolling state by finding a control gain that will minimize an evaluation function, by using the evaluation function that has a weight gain set for each of a plurality of state variables and a plurality of operation amount variables. The method comprises: a step in which a normalizing means normalizes the weight gains; a step in which a comparative evaluation means comparatively evaluates the normalized weight gains of the state variables and also comparatively evaluates the normalized weight gains of the operation amount variables; and a step in which a gain adjusting means adjusts the weight gain of a state variable and/or the weight gain of an operation amount variable on the basis of the results of the comparative evaluations.
Provided is a high-strength galvanized steel sheet having a yield strength of 1000 MPa or higher and having exceptional workability, impact resistance, and crack arrestability. The amount of diffusible hydrogen in the steel sheet is 0.60 mass ppm or less. The steel sheet has a component composition containing, in terms of mass, 0.150-0.450% of C, 0.50-3.00% of Si, 1.50-4.00% of Mn, 0.100% or less of P, 0.0200% or less of S, 0.100% or less of Al, 0.0100% or less of O, and 0.0100% or less of N, the balance being Fe and unavoidable impurities. The steel sheet has a microstructure in which the total area ratio of tempered martensite and bainite is 55-95%, the area ratio of retained austenite is 5-30%, and the abundance ratio X/Y between structures X having a nanohardness of 7.0 GPa or higher and structures Y having a nanohardness of 6.5 GPa or lower is 0.5-2.5.
Provided is a high strength steel sheet which has a yield strength of 800 MPa or more and exhibits excellent workability, collision yield strength, and crack-stopping properties. The diffusible hydrogen amount in the steel is 0.50 ppm by mass or less. The constituent composition of the steel contains, in terms of mass%, 0.150-0.500% of C, 0.01-3.00% of Si, 1.50-4.00% of Mn, 0.100% or less of P, 0.0200% or less of S, 0.100% or less of Al, 0.0100% or less of N and 0.0100% or less of O, with the remainder comprising Fe and unavoidable impurities. The total areal ratio of tempered martensite and bainite is 55-95%. The existence ratio (A/B) of a structure A having a nanohardness of 7 GPa or more and a structure B having a nanohardness of 6 GPa or less is 0.8-2.5. The solid solution carbon concentration in retained austenite is 0.50-0.90 mass%.
Provided is a process control method, a blast furnace operation method, a molten pig iron production method, and a process control apparatus, which are for achieving suppression of variability in molten pig iron temperature while reducing a reduction material ratio in a blast furnace. This process control method comprises: a response prediction step for determining a predictive value of a future molten pig iron temperature by using a physical model with which it is possible to calculate the internal state of a blast furnace; and a manipulation degree determination step for determining the deviation between a target value and the predictive value of the molten pig iron temperature determined in the response prediction step, and determining the degrees by which a fine powdered coal ratio and a blown air moisture are to be manipulated, so as to minimize or maximize an evaluation function having a term corresponding to the deviation and a term for reducing a reduction material ratio or the blown air moisture.
Disclosed is a method for producing an annealed and pickled steel sheet in a continuous manner by continuously performing: subjecting a cold-rolled steel sheet to annealing to obtain an annealed steel sheet; subjecting the annealed steel sheet to pickling with a mixed acid solution containing a first acid that is oxidizing and a second acid that is non-oxidizing, by feeding the annealed steel sheet into a mixed acid tank holding the mixed acid solution; and subjecting the annealed steel sheet discharged from the mixed acid tank to repickling with an acid solution containing a third acid that is non-oxidizing. Fe concentration in the mixed acid solution in the mixed acid tank is measured, and a lower limit of ferrite fraction in a surface layer of the annealed steel sheet to be subjected to the pickling is set according to the Fe concentration measured.
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
A TIG welding filler metal is provided that has a composition including, by mass %, C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Cr: 6.0 to 15.0%, and N: 0.120% or less, the balance being Fe and incidental impurities. Where necessary, the filler metal may contain one or two selected from Ni and Mo, may further contain one, or two or more selected from V, Ti, and Nb, and may additionally contain one, or two or more selected from Cu, Al, Ca, and REM. This configuration reduces the occurrence of welding cracks during TIG welding, that is, realizes excellent hot crack resistance, and allows for easy production of a weld joint having high strength and excellent cryogenic impact toughness.
B23K 35/30 - Emploi de matériaux spécifiés pour le soudage ou le brasage dont le principal constituant fond à moins de 1550 C
B23K 35/22 - Baguettes, électrodes, matériaux ou environnements utilisés pour le brasage, le soudage ou le découpage caractérisés par la composition ou la nature du matériau
Proposed is a method for efficiently desulfurizing molten metal in a short time without passing an excessive current when applying a potential difference between slag and metal. Using a direct-current power source, this method for desulfurizing molten metal applies a potential difference between molten slag and molten metal through electrodes, of which one electrode contacting the molten metal serves as a negative electrode and the other electrode contacting only the molten slag serves as a positive electrode. An applied current density Ja is determined according to an equilibrated S concentration [S]e0 before application of a potential difference such that an equilibrated S concentration [S]ea when a potential difference is applied becomes equal to or lower than a target S concentration [S]ft.
HOT-PRESSED MEMBER, COATED MEMBER, STEEL SHEET FOR HOT PRESSING, METHOD FOR MANUFACTURING HOT-PRESSED MEMBER, AND METHOD FOR MANUFACTURING COATED MEMBER
C21D 1/18 - Durcissement; Trempe avec ou sans revenu ultérieur
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
Disclosed is a component for solid oxide fuel cells that is excellent in both electrical conductivity and chromium poisoning resistance. As a substrate, a ferritic stainless steel having a chemical composition containing, in mass%, Cr: 14.0 % to 32.0 % and Al: 2.50 % to 7.00 % is used. Precious metal particles are coated on a surface of the substrate. The precious metal particles have: an average particle size of 1 μm or more and 10 μm or less; a coating thickness of 0.5 μm or more and 10 μm or less; and a surface coverage of 1.0 % or more.
Provided is a method for producing a pellet, the method being capable of suppressing green pellet bursting. This method for producing an iron ore pellet comprises: a crushing step for obtaining ore powder by crushing iron ore having an iron content of 63 mass% or less. The volatile content of the iron ore is 3.3 mass% or greater. The iron ore powder has a cumulative 90% diameter in the grain size distribution by volume of 150 μm or less and a grain size distribution index based on the harmonic mean diameter of 14,700 to 510,000.
This method for manufacturing a press-molded article 1 is a method for manufacturing a press-molded article 1 having a main body part 11, which has a top plate part 5 and vertical wall parts 7 formed with ridgeline parts 9 interposed therebetween, and an outer flange part 3 formed on an end of the main body part 11 so as to be continuous from the top plate part 5, the ridgeline parts 9, and the vertical wall parts 7, the method including: an intermediate molding step for molding an intermediate molded article 24 that has the top plate part 5 and the vertical wall parts 7 formed with the ridgeline parts 9 interposed therebetween and that has a step formation part 27 at a root section of an outward-flange-equivalent part 25 so that the outward-flange-equivalent part 25 bulges outwards; and a target shape molding step for folding the outward-flange-equivalent part 25 of the intermediate molded article 24 outwards, forming an outward flange part 3, and molding a target shape.
Provided are a method for controlling a process, a method for operating a blast furnace, a method for manufacturing molten metal, and a device for controlling a process that make it possible to highly accurately predict, and control, the state of a blast furnace. In this method for controlling a process: the pig iron production speed, the gas permeability, and the hot metal temperature of a blast furnace are acquired by means of observed values or calculated values; and the pig iron production speed, the gas permeability, and the hot metal temperature are simultaneously controlled on the basis of the acquired observed values or calculated values, as well as a target value for the hot metal temperature (target hot metal temperature), a target value for the pig iron production speed (target pig iron production speed), and a management value for the gas permeability (furnace interior pressure loss upper limit).
It is provided a surface-treated steel sheet that can be produced without using hexavalent chromium and has excellent sulfide staining resistance and coating secondary adhesion. It is a surface-treated steel sheet having: a Sn plating layer; a metallic Cr layer disposed on the Sn plating layer; and a Cr oxide layer disposed on the metallic Cr layer, on at least one surface of a steel sheet, and the surface-treated steel sheet has a water contact angle of 50° or less and a total atomic ratio of K, Na, Mg, and Ca adsorbed on the surface to Cr of 5% or less.
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
C21D 9/46 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet pour tôles
Provided are a steel sheet having high strength and high delayed fracture resistance and a method for manufacturing the steel sheet. The steel sheet has a specific chemical composition and a microstructure in which the area fraction of martensite is 95% to 100%, with the balance being one or more of bainite, ferrite, and retained austenite. In the steel sheet, prior-austenite grains have an average grain size of 18 μm or less, 90 mass % or more of the total content of Nb and Ti contained is present as a carbonitride having an equivalent circular diameter of 100 nm or more, and a Nb carbonitride and a Ti carbonitride, having an equivalent circular diameter of 1.0 μm or more, are present at a rate of 800 pieces/mm2 or less in total. The steel sheet has a tensile strength of 1310 MPa or more.
C21D 6/00 - Traitement thermique des alliages ferreux
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
A press forming method for suppressing wall camber of a side wall portion due to springback of a press-formed product including a top portion, the side wall portion and a flange portion includes: a first forming step of press-forming a preformed part including a flange portion having height continuously changed in an axial direction to have a concave shape, a convex shape or a concavo-convex shape more largely than a target shape of the press-formed product in a height direction to provide a height difference; and a second forming step of press-forming the preformed part into the press-formed product having the target shape to reduce the height difference of the flange portion of the preformed part.
A converter steelmaking method has molten pig iron subjected to dephosphorization process for dephosphorized molten iron, dephosphorized molten iron is subjected to decarburization process for molten steel. For dephosphorization process, a first cold iron source in amount meeting Formula (1) is charged into first converter-type vessel, then undephosphorized molten pig iron is charged and subjected to dephosphorization process. Dephosphorized molten iron is discharged and held in molten metal receiving vessel. After second cold iron source is charged into first converter-type vessel in which dephosphorization process has been performed, the dephosphorized molten iron held in molten metal receiving vessel is charged and subjected to decarburization process. % Ws0≤0.1186T−134 (% Ws0≥0) . . . (1), where % Ws0: a ratio (%) of first cold iron source to sum of first cold iron source and charge amount of undephosphorized molten pig iron, and T: a temperature (° C.) of undephosphorized molten pig iron.
Disclosed is a component for solid oxide fuel cells that is excellent in both electrical conductivity and chromium poisoning resistance. As a substrate, a ferritic stainless steel having a chemical composition containing, in mass %, Cr: 14.0% to 32.0% and Al: 2.50% to 7.00% is used. Precious metal particles are coated on a surface of the substrate. The precious metal particles have: an average particle size of 1 μm or more and 10 μm or less; a coating thickness of 0.5 μm or more and 10 μm or less; and a surface coverage of 1.0% or more.
H01M 8/0217 - Oxydes complexes, éventuellement dopés, de type AMO3, A étant un métal alcalino-terreux ou un métal de terres rares et M étant un métal, p.ex pérovskites
H01M 8/0245 - Composites sous forme de produits en couches ou enrobés
Provided is an electromagnetic steel strip friction stir welding method that can, under high processing efficiency, suppress fracturing of a coil weld section on a manufacturing line, said fracturing being due to degradation in the shape or degradation in the mechanical properties of the coil weld section. Later-cooling-style double-sided friction stir welding is performed according to conditions such that the respective steel compositions of a weld section and a thermal process-affected section that are formed due to the welding will be ferrite phase-based compositions and simultaneously satisfy expressions (1)-(4).
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
B21B 15/00 - Systèmes permettant d'effectuer des opérations auxiliaires pour le travail des métaux, spécialement combinés, disposés ou adaptés pour être associés aux laminoirs
Provided is a friction stir joining method which is for an electromagnetic steel strip and which, while having a high working efficiency, is capable of preventing a coil joining section in a manufacturing line from breaking due to the deterioration of mechanical characteristics and the deterioration of the shape of the coil section. Post-cooling-type two-surface friction stir joining is performed under a condition satisfying both the relationships of formulas (1) and (2).
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
B21B 15/00 - Systèmes permettant d'effectuer des opérations auxiliaires pour le travail des métaux, spécialement combinés, disposés ou adaptés pour être associés aux laminoirs
Provided are manufacturing equipment, a manufacturing method, and an acceptability determination method for a metal band by which it is possible to reliably perform quality assurance regarding the warpage of a metal band. The manufacturing equipment for a metal band comprises: a heating unit (6) that continuously heats a metal band being conveyed; a cooling unit (8) that cools the metal band heated by the heating unit; a shape correction unit (13) that corrects the shape of the metal band cooled by the cooling unit; a first warpage measurement unit (14) that is disposed downstream of the shape correction unit, and that measures the warpage of the metal band; and a warpage determination unit (41) that determines the position information of the metal band in relation to the front end, and determines the correlation between the warpage of the metal band measured by the first warpage measurement unit and the position information of the metal band in relation to the front end.
Provided is an annealing facility which more actively controls carbon in steel, thereby contributing to further improvement of magnetic properties. This annealing facility has a heating zone, a soaking zone, and a cooling zone on a steel strip conveyance line, wherein: the conveyance line can pass a steel strip having a thickness of 2.8 mm or greater; the soaking zone has a means for maintaining the ambient temperature at 900°C or greater; the cooling zone has a means for supplying a refrigerant to the steel strip to set the average cooling rate in a temperature range of 750°C to 120°C to at least 50°C/s; and a means for removing the refrigerant is provided on the outlet side of the cooling zone.
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 9/56 - Fours continus pour bandes ou fils métalliques
A method for producing a grain-oriented electromagnetic steel sheet, the method preventing a break during cold rolling when a grain-oriented electromagnetic steel sheet is produced by subjecting a steel slab, which contains, in mass%, 0.03% to 0.08% of C, 2.0% to 5.0% of Si, 0.005% to 1.0% of Mn, less than 0.010% of Al, 0.006% or less of N and 0.0060% or less of O, while containing S and Se within the range where (S + 0.405 × Se) is 0.0015% to 0.0060%, to hot rolling, hot rolled sheet annealing, cold rolling, decarburization annealing that doubles as primary recrystallization annealing, and subsequent finish annealing, by performing at least two consecutive passes of rolling within the temperature range of 1050°C to 1150°C during the hot rolling, and setting the inter-pass time between the two passes to 60 s or less, the draft of each pass to 20% or more, and the strain rate to 15 s-1 or more; and a hot rolled sheet which is used for this production method.
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 molten iron refining method capable of securing an in-flame staying time period of a heat transfer medium without being influenced by height adjustments of a blowing-purpose oxygen-blowing lance. As far as to a position lower than an upper end inside a converter-type vessel 1, a blowing-purpose oxygen-blowing lance 3 that supplies oxidizing gas and is capable of ascending and descending and at least one burner lance 4 capable of ascending and descending independently of the blowing-purpose oxygen-blowing lance are inserted. From the blowing-purpose oxygen-blowing lance, either oxidizing gas or oxidizing gas and CaO-containing refining agent are blown onto the molten iron. Also, a flame is formed by causing the burner lance to discharge fuel gas and combustion supporting gas. Powder particles discharged from the burner lance are caused to pass through the flame and to be blown onto the molten iron in a heat-transferred state, so that the molten iron is thermally compensated.
Provided is a stainless steel sheet which is for a fuel cell separator and has excellent press workability and Fe ion elution resistance. The stainless steel sheet has a composition containing, in mass%, 18.0-24.0% of Cr and 3.00% or less of Ni, has a steel microstructure containing an austenitic phase and a ferritic phase, the fraction of the austenitic phase being at least 30% and the total fraction of the austenitic phase and the ferritic phase being at least 95%, and has a total elongation of at least 40%.
C22C 38/40 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel
C22C 38/58 - Alliages ferreux, p.ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
H01M 8/0228 - Composites sous forme de produits en couches ou enrobés
H01M 8/10 - PROCÉDÉS OU MOYENS POUR LA CONVERSION DIRECTE DE L'ÉNERGIE CHIMIQUE EN ÉNERGIE ÉLECTRIQUE, p.ex. BATTERIES Éléments à combustible; Leur fabrication Éléments à combustible avec électrolytes solides
A granular metal production device with which it is possible to make molten metal into granular metal of a predetermined grain size or less even if the height is restricted. The molten metal in a first flow path (9) collides with a step (11) at the inlet of a second flow path (10) created by a difference in opening area, causing rapid speed fluctuations to occur, when molten metal flows from the upper first flow path (9) into the lower second flow path (10) in a discharge port (4) provided in the bottom (3a) of a container (3). As a result, a speed distribution of the flow speed occurs within the cross-section of the molten metal flowing down from the second flow path (10), and this speed distribution allows the molten metal that collides with the collision structure (5) and scatters to be reliably granulated.
B22D 5/00 - Machines ou installations pour la coulée de gueuses ou produits similaires
B22D 23/00 - Procédés de coulée non prévus dans les groupes
B22D 25/02 - Coulée particulière caractérisée par la nature du produit d'œuvres d'art
B22F 9/08 - Fabrication des poudres métalliques ou de leurs suspensions; Appareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau liquide par coulée, p.ex. à travers de petits orifices ou dans l'eau, par atomisation ou pulvérisation
This cold-rolling method includes a calculation step for calculating the levelling amount of a rolling machine using the out-of-plane deformation amount of a steel sheet measured on the upstream side of the rolling machine, a control step for controlling the levelling of the rolling machine on the basis of the levelling amount calculated in the calculation step, and a cold rolling step for cold-rolling the steel sheet using the rolling machine controlled in the control step.
B21B 37/58 - Commande de la force de laminage; Commande de l'écartement des cylindres
B21B 1/22 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilés; Séquence des opérations dans les trains de laminoirs; Installation d'une usine de laminage, p.ex. groupement de cages; Succession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies
B21B 37/28 - Commande de la planéité ou du profil pendant le laminage de bandes, de feuilles ou de tôles
B21B 37/68 - Commande de la cambrure ou de la direction des bandes, des feuilles ou des tôles, p.ex. prévention des méandres
B21B 38/02 - Procédés ou dispositifs de mesure spécialement adaptés aux laminoirs, p.ex. détection de la position, inspection du produit pour mesurer la planéité ou le profil des bandes
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
65.
PRESS FORMING ANALYSIS METHOD, PRESS FORMING FRACTURE DETERMINING METHOD FOR PRESS-FORMED ARTICLE, PRESS-FORMED ARTICLE MANUFACTURING METHOD, PRESS FORMING ANALYSIS DEVICE, AND PRESS FORMING ANALYSIS PROGRAM
A press forming analysis method according to the present invention includes a blank model creating step (S1) for creating a blank model, and a press forming analysis step (S2) for performing press forming analysis using the created blank model, wherein the blank model creating step (S1) includes: a blank mesh creating step (S1-1) for creating a finite element mesh for configuring the blank model; a grouping step (S1-2) for grouping finite elements constituting the finite element mesh into a plurality of groups; and a deformation condition setting step (S1-3) for setting conditions relating to deformation for the finite elements of each grouped group, the set conditions being different for each group.
B21D 22/00 - Mise en forme sans coupage, par estampage, repoussage ou emboutissage
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]
This material discharge control device 10 controls the discharge amount of a material 203 which is discharged from a material hopper 20. The material discharge control device 10 comprises a material property measuring device 12 for measuring the properties of the material 203 to be charged in the material hopper 20; and a control device 11 for controlling the discharge amount of the material 203 on the basis of the properties of the material 203.
A stress-strain relationship inference method according to the present invention involves: defining a converted parameter obtained by converting a parameter of the Yoshida-Uemori model; setting, as objective functions, the weighted residual sums of squares obtained by multiplying, by individual weighting coefficients, the residuals between experimental values and calculated values of a stress-strain curve under uniaxial tensile stress, the residuals between experimental values and calculated values of a stress-strain curve under repeated tension-compression stress, and the residuals between experimental values and calculated values of a mechanical characteristic value of a metal material; and determining the converted parameter and another parameter so as to minimize the objective functions under a restriction condition relating to possible ranges of the converted parameter and the other parameter.
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
B21D 22/00 - Mise en forme sans coupage, par estampage, repoussage ou emboutissage
G01N 3/32 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique en appliquant des efforts répétés ou pulsatoires
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 119/14 - Analyse des forces ou optimisation des forces, p.ex. forces statiques ou dynamiques
68.
CHEMICAL AGENT FOR FORMING SOLID LUBRICATION COATING, CHEMICAL AGENT PRODUCTION METHOD, CHEMICAL AGENT APPLICATION METHOD, OIL WELL PIPE, AND OIL WELL PIPE SCREW JOINT
The present invention provides a chemical agent which is environmentally friendly and a solid lubrication coating. Provided is a chemical agent for forming a solid lubrication coating on a metal surface. The main components are a solid lubricant, a binder resin, and a solvent. The solvent has water as the main component thereof, and a lower alcohol with a carbon number of three or less is added as an additive to the water. The volume of the additive is 0.5-45 with respect to a volume of 100 of the water in the solvent. Not less than 95% of the volume of the solvent is constituted by water and the additive. At least a metal soap is contained as the solid lubricant. The metal soap component is not less than 95% of the total combined weight of the metal soap and an alkali soap component. The particle size of the metal soap does not exceed the film thickness of the solid lubrication coating. The binder resin is constituted by a water-soluble or water-dispersible polymer and a copolymer. The binder resin contains a copolymer and a polymer having an acrylate or methacrylate structure in an amount of not less than 90% of the total weight of the binder resin.
C09D 133/00 - Compositions de revêtement à base d'homopolymères ou de copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un seul ra; Compositions de revêtement à base de dérivés de tels polymères
C10M 129/40 - Acides carboxyliques; Leurs sels comportant des groupes carboxyle liés à des atomes de carbone acycliques ou cycloaliphatiques comportant au moins 8 atomes de carbone monocarboxyliques
C10M 129/44 - Acides carboxyliques; Leurs sels comportant des groupes carboxyle liés à des atomes de carbone acycliques ou cycloaliphatiques comportant au moins 8 atomes de carbone contenant des groupes hydroxyle
F16L 15/04 - Raccords avec filetage; Formes des filetages pour ces raccords avec des joints d'étanchéité supplémentaires
C10N 20/06 - Particules de forme ou de dimensions particulières
C10N 30/06 - Onctuosité; Résistance du film; Anti-usure; Résistance aux pressions extrêmes
C10N 40/00 - Utilisation ou application particulière de la composition lubrifiante
C10N 50/02 - Forme sous laquelle est appliqué le lubrifiant au matériau à lubrifier en solution ou en suspension dans un liquide porteur qui s'évapore ultérieurement pour laisser un revêtement lubrifiant
69.
COATING DRUG FOR FORMING SOLID LUBRICATING FILM, PRODUCTION METHOD FOR SAID COATING DRUG, OIL WELL PIPE REPAIRING METHOD, LUBRICATION IMPROVING METHOD FOR OIL WELL PIPE, AND OIL WELL PIPE
Provided is a drug which is environmentally friendly and durable for actual use in a well. The drug is for forming a solid lubricating film by being applied to a metal surface. The drug contains a solid lubricant, a binder resin, and a solvent as main components, wherein: the solvent contains water as a main component and is obtained by adding, as an additive, a lower alcohol having at most 3 carbon atoms to water; the volume of the additive is 0.5-10 with respect to 100 of the volume of the water; at least 95% of the volume of the solvent is composed of the water and the additive; the solid lubricant contains at least 95% of graphite and metallic soap and at most 1% of alkali soap, with respect to the total weight of solid lubricating components; the amount of the graphite is 0.5-5% with respect to the entire amount of the solid lubricant, in terms of weight ratio; the binder resin is a water-soluble or water-dispersible polymer; and the polymer is a polymer or copolymer containing at least 90% of monomers belonging to acrylate or methacrylate with respect to the total weight of the binder resin.
C09D 133/00 - Compositions de revêtement à base d'homopolymères ou de copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un seul ra; Compositions de revêtement à base de dérivés de tels polymères
C10M 129/40 - Acides carboxyliques; Leurs sels comportant des groupes carboxyle liés à des atomes de carbone acycliques ou cycloaliphatiques comportant au moins 8 atomes de carbone monocarboxyliques
C10M 129/44 - Acides carboxyliques; Leurs sels comportant des groupes carboxyle liés à des atomes de carbone acycliques ou cycloaliphatiques comportant au moins 8 atomes de carbone contenant des groupes hydroxyle
F16L 15/04 - Raccords avec filetage; Formes des filetages pour ces raccords avec des joints d'étanchéité supplémentaires
C10N 20/06 - Particules de forme ou de dimensions particulières
C10N 40/00 - Utilisation ou application particulière de la composition lubrifiante
C10N 50/02 - Forme sous laquelle est appliqué le lubrifiant au matériau à lubrifier en solution ou en suspension dans un liquide porteur qui s'évapore ultérieurement pour laisser un revêtement lubrifiant
70.
OIL WELL PIPE, OIL WELL PIPE SCREW JOINT, AND COATING MATERIAL
Provided is an oil well pipe screw joint having a solid lubrication coat having excellent lubrication and anti-rust properties. This oil well pipe constitutes a box (2) having a female screw or a pin (1) having a male screw that is used in the oil well pipe screw joint formed by linking the box (2) to the pin (1). The outermost layer of a screw section has a resin coat constituted of a binder resin containing an alkaline soap as a solid lubricant. The resin coat has an alkaline soap layer on the surface thereof.
C10M 129/28 - Acides carboxyliques; Leurs sels comportant des groupes carboxyle liés à des atomes de carbone acycliques ou cycloaliphatiques
C10N 30/06 - Onctuosité; Résistance du film; Anti-usure; Résistance aux pressions extrêmes
C10N 30/12 - Inhibition de la corrosion, p.ex. agents antirouille, agents anticorrosifs
C10N 40/00 - Utilisation ou application particulière de la composition lubrifiante
C10N 50/02 - Forme sous laquelle est appliqué le lubrifiant au matériau à lubrifier en solution ou en suspension dans un liquide porteur qui s'évapore ultérieurement pour laisser un revêtement lubrifiant
A molten iron refining method that prevents a cold iron source from remaining unmelted even under the condition of a high ratio of the cold iron source. An auxiliary material is added, and an oxidizing gas is supplied, to cold iron source and molten pig iron that are contained or fed in converter-type vessel, and molten iron is subjected to refining process. Prior to refining process, a pre-charged cold iron source that is charged all at once into the converter-type vessel before the molten pig iron is charged into the converter-type vessel is charged in an amount not larger than 0.15 times the sum of an amount of the pre-charged cold iron source and a charge amount of the molten pig iron, or is not charged. A furnace-top-added cold iron source that is added from a furnace top of the converter-type vessel is fed into converter-type vessel during refining process.
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 proposes a method for producing a sintered ore with high productivity without requiring both an expensive anionic polymer dispersant and a step for grinding an iron ore into a fine powder. The present invention provides a method for producing a sintered ore, wherein a blended sintering starting material including iron ores of a plurality of brands is granulated together with additive water in a granulator, and the resultant granulated starting material for sintering is fired in a sintering machine so as to obtain a sintered ore. With respect to this method for producing a sintered ore, some or all of the additive water during the granulation is replaced with a dust slurry solution that is obtained by suspending solid dust in water at a concentration of 20-55 mass%.
00 of 70 J or more at 0°C and an Mn concentration distribution wherein: the area fraction of average Mn concentration regions, which are defined as the regions having an Mn concentration that is 0.9 to 1.1 times the average Mn content (% by mass), is less than 90%; the area fraction of Mn-enriched regions, which are defined as the regions having an Mn concentration that is not less than 1.15 times the average Mn content (% by mass), is 1.0% or more; and the average circle-equivalent diameter of the Mn-enriched regions is 7.0 µm or less.
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 rolling mill according to the present invention is provided with a pair of upper and lower rolls arranged in a housing and with a roll chock that holds each of the upper and lower rolls, and a liner having a vibration-reducing function is provided on at least one of a housing-facing surface of the roll chock or a housing surface corresponding to a housing-facing surface.
B21B 31/02 - Châssis de laminoir; Supports de cylindres
B21B 33/00 - Dispositifs de sécurité non prévus ailleurs; Disjoncteurs; Dispositifs pour libérer les cylindres coincés
F16F 7/00 - Amortisseurs de vibrations; Amortisseurs de chocs
F16F 15/02 - Suppression des vibrations dans les systèmes non rotatifs, p.ex. dans des systèmes alternatifs; Suppression des vibrations dans les systèmes rotatifs par l'utilisation d'organes ne se déplaçant pas avec le système rotatif
F16F 15/04 - Suppression des vibrations dans les systèmes non rotatifs, p.ex. dans des systèmes alternatifs; Suppression des vibrations dans les systèmes rotatifs par l'utilisation d'organes ne se déplaçant pas avec le système rotatif utilisant des moyens élastiques
Provided is a method for manufacturing a press-molded article whereby the effect of shape variation of a blank is reduced. This method for manufacturing a press-molded article comprises: a reference press-molded article shape acquisition step for acquiring a reference press-molded article shape (5); a first actual blank press-molded article shape acquisition step for acquiring a first actual blank press-molded article shape (13); a first actual deviation amount acquisition step for obtaining a first actual deviation amount between the reference press-molded article shape (5) and the first actual blank press-molded article shape (13); a second actual blank press-molded article shape acquisition step for acquiring a second actual blank press-molded article shape (23); a second actual deviation amount acquisition step for obtaining a second actual deviation amount between the reference press-molded article shape (5) and the second actual blank press-molded article shape (23); a countermeasure-requiring site identification step for identifying a countermeasure-requiring site; a bead imparting step for imparting a bead to an actual mold; and an actual press-molding step for performing press-molding using the actual mold imparted with the bead.
Provided is a chromium-containing steel sheet for a current collector of a nonaqueous electrolyte secondary battery. The chromium-containing steel sheet for a current collector of a nonaqueous electrolyte secondary battery has a chemical composition containing Cr in an amount of 10% by mass or more. A parameter Sa defined in ISO 25178 is from 0.15 μm to 0.50 μm inclusive, and a parameter Ssk defined in ISO 25178 is more than 0.
In an automotive body vibration characteristic testing method according to the present invention, vibration is input into an automotive body 100 and vibration characteristics of the automotive body are found. Said testing method includes an excitation step S1 for exciting the automotive body 100 by setting a plurality of vibration input locations 111 on the automotive body 100, which is supported by an air cushion 211, and inputting vibration into each of the plurality of vibration input locations 111 which have been set, and a vibration measurement step S3 for measuring data regarding the vibration characteristics of the automotive body 100 which has been excited. In the excitation step S1, vibration input waves input into some of the vibration input locations 111 on the automotive body 100 are more delayed than vibration input waves input into other vibration input locations 111.
Provided is a polyimide which exhibits excellent solubility in a solvent. This polyimide is obtained by polymerizing an acid component which contains 3,3',4,4'-biphenyltetracarboxylic dianhydride and a diamine component which contains 20.0-80.0 mol% of a specific compound A and 20.0-80.0 mol% of 2,2-bis-[4-(4-aminophenoxy)phenyl]propane.
Provided is a grain-oriented electrical steel sheet that can benefit from the iron loss improving effect by groove formation while effectively suppressing a decrease in magnetic flux density. A grain-oriented electrical steel sheet comprises predetermined linear grooves, wherein in each linear groove, a proportion of predetermined flat portions to an entire length of the linear groove is 30% or more and 90% or less, the number of flat portions each of which is continuous for a predetermined length is 10 or more per 100 cm2 surface area, and a ratio of ten-point average roughness Rzjis to average depth D is 0.1 or more and 1 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
82.
METHOD OF MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND ROLLING APPARATUS FOR MANUFACTURING ELECTRICAL STEEL SHEET
Provided is a method of manufacturing a grain-oriented electrical steel sheet, with which a grain-oriented electrical steel sheet with low iron loss and little variation in iron loss can be stably manufactured by a tandem mill. The method includes subjecting a steel material to hot rolling to obtain a hot-rolled sheet, subjecting the hot-rolled sheet to cold rolling once or twice or more with intermediate annealing performed therebetween to obtain a cold-rolled sheet with a final sheet thickness, and then subjecting the cold-rolled sheet to decarburization annealing and then to secondary recrystallization annealing, wherein final cold rolling is performed by a tandem mill, and in the final cold rolling, the hot-rolled sheet is heated to a temperature range of 70° C. or higher and 200° C. or lower, then cooled to 60° C. or lower, and then introduced into a first pass of the tandem mill.
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 submerged arc welded joint in a high-Mn content steel material that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the welded joint, the high-Mn content steel material has a chemical composition including, by mass %, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and O: 0.0050% or less, the balance being Fe and incidental impurities, and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.
A method for charging raw materials into a blast furnace is as follows. The blast furnace includes a bell-less charging device that includes a plurality of main hoppers and an auxiliary hopper. The auxiliary hopper has a smaller capacity than the main hoppers. The method includes discharging ore charged in at least one of the plurality of main hoppers, and then sequentially charging the ore from a furnace wall side toward a furnace center side by using a rotating chute. The discharging of low-reactivity ore charged in the auxiliary hopper is started simultaneously with a start of charging of the ore or at a point in time after the start of the charging; and then, the low-reactivity ore is charged together with the ore from the rotating chute. The charging of the low-reactivity ore is stopped at least before a point in time at which charging of 56 mass % of the ore is completed.
Provided is a method for producing a high-strength carbonaceous lump using, as a raw material, a gas containing C in a constituent element. The method for producing a carbonaceous lump according to the present invention has: a carbon precipitation step in which a raw material gas containing a gas containing C in a constituent element is brought into contact with a solid containing Fe in a constituent element to generate a carbon-containing precipitate on a surface of the solid; a step for recovering the carbon-containing precipitate by separating the solid and the carbon-containing precipitate; and then, a lump forming step for obtaining a carbon lump by pressurizing and heating the carbon-containing precipitate.
Provided are a steel sheet and a member, having high strength and high delayed fracture resistance, and methods for manufacturing the steel sheet and the member. The steel sheet has a specific chemical composition and a microstructure in which the area fraction of martensite is 95% to 100%, with the balance being one or more of bainite, ferrite, and retained austenite. In the steel sheet, prior-austenite grains have an average grain size of 18 μm or less, 90 mass % or more of the total content of Nb and Ti contained is present as a carbonitride having an equivalent circular diameter of 100 nm or more, and a Nb carbonitride and a Ti carbonitride, having an equivalent circular diameter of 1.0 μm or more, are present at a rate of 800 pieces/mm2 or less in total. The steel sheet has a tensile strength of 1310 MPa or more.
C22C 38/12 - Alliages ferreux, p.ex. aciers alliés contenant du tungstène, du tantale, du molybdène, du vanadium ou du niobium
C22C 38/14 - Alliages ferreux, p.ex. aciers alliés contenant du titane ou du zirconium
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
87.
HIGH STRENGTH STEEL SHEET, IMPACT ABSORBING MEMBER, AND METHOD FOR MANUFACTURING HIGH STRENGTH STEEL SHEET
A high strength steel sheet has a yield-point elongation of 1% or greater and a tensile strength of 980 MPa or greater. The high strength steel sheet has a specific chemical composition and microstructure. A ratio of retained austenite grains adjoining a retained austenite grain having a different crystal orientation to total retained austenite grains is 0.60 or greater, the ferrite has an average grain size of 5.0 μm or less, and the retained austenite has an average grain size of 2.0 μm or less. A value obtained by dividing a volume fraction Vγa by a volume fraction Vγb is 0.40 or greater, where the volume fraction Vγa is a volume fraction of retained austenite in a fractured portion of a tensile test specimen after a warm tensile test at 150° C., and the volume fraction Vγb is a volume fraction of retained austenite before the warm tensile test at 150° C.
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 6/00 - Traitement thermique des alliages ferreux
C21D 1/18 - Durcissement; Trempe avec ou sans revenu ultérieur
C23C 2/02 - Pré-traitement du matériau à revêtir, p.ex. pour le revêtement de parties déterminées de la surface
C25D 5/36 - Prétraitement des surfaces métalliques à revêtir de métaux par voie électrolytique de fer ou d'acier
A high strength steel sheet has a yield-point elongation of 1.0% or greater and a tensile strength of 980 MPa or greater. The high strength steel sheet has a specific chemical composition and microstructure. The ferrite has an average grain size of 5.0 μm or less, the retained austenite has an average grain size of 2.0 μm or less, a value obtained by dividing a Mn content of the retained austenite by a Mn content of steel is 1.50 or greater, 15% or more of all retained austenite grains in the retained austenite have an aspect ratio of 3.0 or greater, and 15% or more of all the retained austenite grains in the retained austenite have an aspect ratio of less than 2.0.
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
89.
POWDER FOR ANNEALING SEPARATOR AND PRODUCTION METHOD FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET USING SAME
An annealing separator, by being applied to a steel sheet, enables retention of a good shape of a coil after annealing obtained by winding the steel sheet with the annealing separator applied thereto into a coil which is then annealed at a high temperature exceeding 1000° C. A powder used as the annealing separator: contains magnesium oxide as a main component and B: 0.020 mass % or more and 0.200 mass % or less, SO3: 0.030 mass % or more and 2.000 mass % or less, and P2O3: 0.050 mass % or more and 1.000 mass % or less; and contains 0.2 mass % or more and 5.0 mass % or less of particles having a particle size of more than 45 μm and 75 μm or less. The particles having this particle size contain (boron) B: 0.002 mass % or more and less than 0.020 mass %, SO3: less than 0.030 mass %, and P2O3: less than 0.050 mass %.
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
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
The present invention proposes a production method for reduced iron that makes it possible to prevent clustering when a shaft furnace or a kiln furnace is used to reduce a reduction starting material by means of a reducing gas to obtain reduced iron. A production method according to the present invention involves using a shaft furnace or a kiln furnace to reduce a reduction starting material by means of a reducing gas to obtain reduced iron. The reduction starting material includes sintered ore. The reduction starting material preferably consists of: no more than 80 mass% of the sintered ore; and at least one of residual lump ore and pellets.
To further enhance the evaluation accuracy of a delayed fracture. Focusing on the fact that a calculated stress value serving as the reference for the occurrence of the delayed fracture changes depending on analysis conditions of a forming analysis, a value obtained by changing a stress value serving as the reference for the occurrence of the delayed fracture according to the analysis conditions for analyzing an intended formed article (article for practical use) is used as the reference for evaluating the delayed fracture. For example, analysis conditions of a forming analysis in an evaluation test of the delayed fracture are matched with analysis conditions of a forming analysis of an article for practical use represented by an actual automobile component.
G01N 3/20 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique en appliquant des efforts permanents de flexion
A method of evaluating central segregation in steel with excellent correlation with HIC susceptibility is provided. A method of evaluating central segregation in steel includes: taking a sample from a steel, the sample having a cross section including a central segregation area; measuring an area ratio of an inclusion containing a segregation metal element in a region to be measured including the central segregation area in the cross section; and evaluating central segregation in the steel based on the area ratio measured.
G01N 23/2251 - Recherche ou analyse des matériaux par l'utilisation de rayonnement [ondes ou particules], p.ex. rayons X ou neutrons, non couvertes par les groupes , ou en mesurant l'émission secondaire de matériaux en utilisant des microsondes électroniques ou ioniques en utilisant des faisceaux d’électrons incidents, p.ex. la microscopie électronique à balayage [SEM]
G01N 23/2252 - Recherche ou analyse des matériaux par l'utilisation de rayonnement [ondes ou particules], p.ex. rayons X ou neutrons, non couvertes par les groupes , ou en mesurant l'émission secondaire de matériaux en utilisant des microsondes électroniques ou ioniques en utilisant des faisceaux d’électrons incidents, p.ex. la microscopie électronique à balayage [SEM] en mesurant les rayons X émis, p.ex. microanalyse à sonde électronique [EPMA]
A shape change prediction method of a press formed part predicts a shape change in which an end side in a longitudinal direction is twisted due to stress relaxation with a lapse of time after springback at a moment of die release from a tool of press forming with respect to the press formed part having a U-shaped cross-sectional shape including a top portion and side wall portions, and includes: acquiring a shape and a residual stress of the press formed part immediately after the springback by a springback analysis of the press formed part; setting a value of stress relaxed and reduced compared to the residual stress immediately after the springback for at least one of the side wall portions; and acquiring a shape with which moment of force is balanced for the press formed part in which the value of the relaxed and reduced stress is set.
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
B21D 22/26 - Emboutissage pour faire des objets de formes particulières, p.ex. de formes irrégulières
A continuous casting method of steel of continuously casting a slab by using a vertical liquid bending type continuous casting machine. The method includes, while performing continuous casting by using an in-mold electromagnetic stirring device, applying an alternating-current moving magnetic field that moves in a width direction of a mold to molten steel inside the mold, inducing a swirling flow in the molten steel, and stirring the molten steel. A travel speed of the alternating-current moving magnetic field calculated by a specified formula is in a range of 0.20 to 1.50 m/s.
WW, the time from removal of the furnace lid 12 to the start of measurement by the laser-type three-dimensional shape measurement device 20 is denoted by t, and the distance from a kiln mouth 11 to the laser-type three-dimensional shape measurement device 20 is denoted by L, the furnace wall shape of the carbonization chamber 10 is measured by determining the time t and the distance L so as to satisfy expression (1) below. (1): (10/t)/{(L + 4)/5.5}2WW 4≤ 4.1 x 1012
To alleviate stress exerted on a thread portion of a threaded steel pipe or tube during use to prevent fatigue fracture, there is provided a threaded steel pipe or tube having a female thread portion on an inner peripheral surface of at least one end, wherein a maximum value of residual compressive stress at a position of 0.4 mm in a depth direction from a thread bottom of the female thread portion is 100 MPa or more and less than or equal to tensile strength of a material of the threaded steel pipe or tube.
F16L 15/00 - Raccords avec filetage; Formes des filetages pour ces raccords
B23G 1/02 - Filetage; Machines automatiques spécialement conçues pour le filetage d'une surface cylindrique ou conique, extérieure ou intérieure, p.ex. d'évidements
100.
COLD ROLLING METHOD AND METHOD FOR PRODUCING COLD-ROLLED STEEL SHEET
Provided is a cold rolling method by which the occurrence of wrinkles during cold rolling can be prevented without having to modify a mill. A cold rolling method of rolling a steel sheet in multiple rolling passes using a cold mill, the method including when the steel sheet unit tension N1 during steady-state rolling exceeds the reference unit tension N0 in a specific rolling pass in which the target sheet thickness t0 on an exit side of the rolling pass is less than or equal to a reference sheet thickness, controlling the steel sheet unit tension N2 in an initial stage of rolling on an entry side of the specific rolling pass to be less than the reference unit tension N0 and less than the steel sheet unit tension N1 during the steady-state rolling, the reference unit tension N0 is calculated by the formula (1): N0=(150/9)t0+27.1.