Abstract: A steel sheet containing C: 0.0005% or more and 0.0035% or less, Si: 0.05% or less, Mn: 0.1% or more and 0.6% or less, P: 0.02% or less, S: less than 0.02%, Al: 0.01% or more and less than 0.10%, N: 0.0030% or less, B: 0.0010% or more, in which the relationship B/N?3.0 is satisfied and the balance being Fe and inevitable impurities, and a microstructure in which the average integrated intensity f in the (111)[1-10] to (111)[-1-12] orientations on a plane parallel to a sheet surface at a position located at ¼ of the thickness of the steel sheet is 7.0 or more, in which an average ferrite grain size is 6.0 ?m or more and 10.0 ?m or less, and the relationships EAVE?215 GPa, E0?210 GPa, E45?210 GPa, E90?210 GPa, and ?0.4??r?0.4 are satisfied.

Abstract: A steel sheet containing C: 0.02% or more and 0.10% or less, Si: 0.01% or more and 0.5% or less, P: 0.001% or more and 0.100% or less, S: 0.001% or more and 0.020% or less, N: 0.007% or more and 0.025% or less, Al: 0.01% or more and {?4.2×N (%)+0.11} % or less, Mnf: 0.10% or more and less than 0.30% where Mnf is defined by equation Mnf=Mn?1.71×S, and the balance being Fe and inevitable impurities, in which the steel sheet has a thickness of 0.35 (mm) or less, the product of the lower yield point (N/mm2) of the steel sheet and the thickness (mm) is 160 (N/mm) or less, and the product of the upper yield point (N/mm2) of the steel sheet is 52.0 (N) or more.

Abstract: An object of the present invention is to provide a method for designing a metal material having mechanical properties with which a specified spring back angle can be achieved after any one of metal materials having a wide variety of mechanical properties and thicknesses has been formed by performing cylinder forming and a product formed by using the method.

Abstract: A steel sheet is provided containing C: 0.070% or more and less than 0.080%, Si: 0.003% or more and 0.10% or less, Mn: 0.51% or more and 0.60% or less, wherein the average grain size is 5 ?m or more, the grain elongation rate is 2.0 or less, the difference in hardness is 10 points or more and/or 20 points or more depending on how it is determined, the tensile strength is 500 MPa or more, and the elongation after fracture is 10% or more.

Abstract: A high-strength, high-workability steel sheet for cans contains 0.070% to less than 0.080% C, 0.003% to 0.10% Si, 0.51% to 0.60% Mn, and the like on a mass basis and has a tensile strength of 500 MPa or more and a yield elongation of 10% or more. The average size and elongation rate of crystal grains are 5 ?m or more and 2.0 or less, respectively, in cross section in the rolling direction thereof. The hardness difference obtained by subtracting the average Vickers hardness of a cross section ranging from a surface to a depth equal to one-eighth of the thickness of the sheet from the average Vickers hardness of a cross section ranging from a depth equal to three-eighths of the sheet thickness to a depth equal to four-eighths of the sheet thickness is 10 points or more and/or the maximum Vickers hardness difference is 20 points or more.

Abstract: A high-strength, high-workability tin mill black plate contains 0.070% to less than 0.080% C, 0.003% to 0.10% Si, 0.51% to 0.60% Mn, and the like on a mass basis and has a tensile strength of 500 MPa or more and a yield elongation of 10% or more. The average size and elongation rate of crystal grains are 5 ?m or more and 2.0 or less, respectively, in cross section in the rolling direction thereof. The hardness difference obtained by subtracting the average Vickers hardness of a cross section ranging from a surface to a depth equal to one-eighth of the thickness of the plate from the average Vickers hardness of a cross section ranging from a depth equal to three-eighths of the plate thickness to a depth equal to four-eighths of the plate thickness is 10 points or more and/or the maximum Vickers hardness difference is 20 points or more.

Abstract: A method provides a slab by continuous casting of a steel having a component composition of, in mass %, C: 0.005% or less, Mn: 0.05 to 0.5%, Al: 0.01 to 0.10%, N: 0.0010 to 0.0070%, B: 0.15×N to 0.75×N (0.15 to 0.75 in terms of B/N), and one or both of Nb: 4×C to 20×C (4 to 20 in terms of Nb/C) and Ti: 2×C to l0×C (2 to 10 in terms of Ti/C), and the balance of Fe and inevitable impurity elements; rough rolling the slab; finish rolling the rough-rolled slab wherein 5% or more and less than 50% of the total amount of rolling reduction in the finish rolling is hot-rolled at a temperature lower than the Ar3 transformation point; winding the hot-rolled steel sheet at a winding temperature of 640 to 750 ° C.; pickling the coiled steel sheet; cold rolling the pickled steel sheet at a rolling reduction rate of 88 to 96%; and annealing the cold-rolled steel sheet in a temperature range of higher than 400 ° C. to a temperature that is 20 ° C. lower than the recrystallization temperature.

Abstract: A method for manufacturing a can body by forming a circular laminated steel sheet having a radius of R0 includes producing a form at least one time with a laminated steel sheet coated with a polyester resin, which has a plane orientation coefficient of 0.06 or less such that that the height h, the maximum radius r, and the minimum radius d of the form satisfy d?r, 0.2?d/R?0.5, and 1.5?h/(R?r)?2.5, where R represents the radius of the laminated steel sheet having a weight equivalent to the weight of a final form; heating the resulting form at least one time at a temperature of 150° C. or higher, and lower than or equal to the melting point of the polyester resin; and working the heat-treated form into a form satisfying d?r, 0.1?d/R?0.25, and 1.5?h/(R?r)?4.

Abstract: In a method for producing a two-piece can, a circular disk of a laminated steel sheet having a thermoplastic resin coating layer is subjected to multistage forming to produce a final formed body having a height h, a maximum radius r, and a minimum radius d (the case where r is equal to d is also included). Forming is performed so that the height h, maximum radius r, and minimum radius d of the final formed body satisfy the relationships 0.1?d/R?0.25 and 1.5?h/(R?r)?4 with respect to a radius R of a circular disk before forming whose weight is equal to that the final formed body. At an intermediate stage of forming, a formed body is subjected to heat treatment at a temperature of not less than a melting point of a thermoplastic resin but not more than a temperature 30° C. higher than the melting point.

Abstract: Provided is a steel sheet having excellent surface roughening resistance and a manufacturing method thereof. The steel sheet for cans contains 0.0040 to 0.01% C and 0.02 to 0.12% Nb. An average ferrite grain size in a cross section in the rolling direction in a region ranging from a surface layer of the steel sheet to a position ¼ of a sheet thickness away from the surface layer of the steel sheet is set to 7 ?m or more and 10 ?m or less, and the average ferrite grain size in a cross section in the rolling direction in a region ranging from the position ¼ of a sheet thickness away from the surface layer of the steel sheet to a sheet thickness center portion of the steel sheet is set to 15 ?m or less.

Abstract: A laminated steel sheet including a polyester resin layer arranged on at least one face of the steel sheet, polyester resin forming the polyester resin layer is obtained by polycondensation of dicarboxylic acid and diol components, the dicarboxylic component contains terephthalic acid as the main ingredient and a copolymerizing ingredient, the diol component comprises ethylene and/or butylene glycol as a main ingredient and a copolymerizing ingredient, the sum of the copolymerizing ingredient in the dicarboxylic acid and the copolymerizing ingredient in the diol component is 8 to 16% by mole in the polyester resin, and the polyester resin layer has 0.06 or less of plane orientation factor.

Abstract: A component composition contains, by % by mass, 0.0016 to 0.01% of C, 0.05 to 0.60% of Mn, and 0.020 to 0.080% of Nb so that the C and Nb contents satisfy the expression, 0.4?(Nb/C)×(12/93)?2.5. In addition, the amount of Nb-based precipitates is 20 to 500 ppm by mass, the average grain diameter of the Nb-based precipitates is 10 to 100 nm, and the average crystal grain diameter of ferrite is 6 to 10 ?m. Nb is added to ultra-low-carbon steel used as a base, and the amount and grain diameter of the Nb-based precipitates are controlled to optimize the pinning effect. Grain refinement of ferrite is achieved by specifying the Mn amount, thereby achieving softening and excellent resistance to surface roughness of steel.

Abstract: A method of manufacturing an easy open end includes the steps of using a laminated steel sheet with resin films formed on both surfaces of the laminated steel sheet, and forming a panel structure and a score. A score die used for forming the score includes a scoring edge having a cross section in which a tip is a curve and two sides with the tip interposed therebetween are tangent to the curve. The tip is the curve having a curvature radius ranging from 0.2 to 0.4 mm, and the two sides have elevation angles ? in a range of 0.3?tan ??1.0 to an end surface. The panel structure is formed by a motion that is synchronous with a motion in which the score die is pressed to a surface of the laminated steel sheet during the formation of the score.

Abstract: We manufacture a two-piece can by the method using a laminated steel sheet as the base material, having the steps of: drawing a cylindrical blank for several times to form a can body in a shape of cylinder integrated with bottom; forming a tapered part extending outward from the can body in the radial direction thereof at the tip of the opening of the can body; applying diametral reduction to the tapered part to the diameter of the can body; and applying diametral reduction to the opening side of the can body to a diameter smaller than the diameter of the can body, while satisfying the formulae (1) and (2), 1.5?h/(R?R)??(1) d/R?0.25??(2) where h is the height from the can bottom to the tip of the opening, R is the circular blank positional radius, r is the radius of the can bottom, and d is the radius of the tip of the opening.

Abstract: A method provides a slab by continuous casting of a steel having a component composition of, in mass %, C: 0.005% or less, Mn: 0.05 to 0.5%, Al: 0.01 to 0.10%, N: 0.0010 to 0.0070%, B: 0.15×N to 0.75×N (0.15 to 0.75 in terms of B/N), and one or both of Nb: 4×C to 20×C (4 to 20 in terms of Nb/C) and Ti: 2×C to 10×C (2 to 10 in terms of Ti/C), and the balance of Fe and inevitable impurity elements; rough rolling the slab; finish rolling the rough-rolled slab wherein 5% or more and less than 50% of the total amount of rolling reduction in the finish rolling is hot-rolled at a temperature lower than the Ar3 transformation point; winding the hot-rolled steel sheet at a winding temperature of 640 to 750° C.; pickling the coiled steel sheet; cold rolling the pickled steel sheet at a rolling reduction rate of 88 to 96%; and annealing the cold-rolled steel sheet in a temperature range of higher than 400° C. to a temperature that is 20° C. lower than the recrystallization temperature.

Abstract: A steel sheet for containers that has a hardness of 500 MPa or more and superior workability and a method for producing the steel sheet are provided. A steel containing, in percent by mass, 0.01% to 0.05% carbon, 0.04% or less silicon, 0.1% to 1.2% manganese, 0.10% or less sulfur, 0.001% to 0.100% aluminum, 0.10% or less nitrogen, and 0.0020% to 0.100% phosphorus, the balance being iron and incidental impurities, is subjected to hot rolling at a finishing temperature of (Ar3 transformation temperatute?30)° C. or more and a coiling temperature of 400° C. to 750° C., is subjected to pickling and cold rolling, is subjected to continuous annealing including overaging treatment, and is subjected to second cold rolling at a reduction rate of 20% to 50%, thus providing a high-strength steel sheet for containers that has a tensile strength of 500 MPa or more and a proof stress difference between width and rolling directions of 20 MPa or less.

Abstract: An ironing apparatus includes an ironing die and an ironing punch, an injection port for injecting gas or liquid to the metal plate at a high pressure to remove substance adhered to the metal plate therefrom, a suction port for sucking the adhered substance removed from the metal plate, and a protrusion mount portion with a protrusion for preventing dispersion of the gas or the liquid. An ironing method for ironing the metal plate having the single surface or both surfaces coated with the organic resin film includes the steps of injecting the gas or the liquid from the injection port to the metal plate at the high pressure to remove the adhered substance from the metal plate, and sucking and collecting the adhered substance removed from the metal plate from the suction port. The adhered substance such as the hair may be removed by the aforementioned invention.

Abstract: A steel sheet for a can has a yield strength of 450 MPa or more, and the occurrence of cracking at a slab corner being prevented in a continuous casting process. The steel sheet contains 0.03%-0.10% C, 0.01%-0.5% Si, 0.001%-0.100% P, 0.001%-0.020% S, 0.01%-0.10% Al, 0.005%-0.012% N, and the balance being Fe and incidental impurities, in which when Mnf=Mn [% by mass]?1.71×S [% by mass], Mnf is in the range of 0.3 to 0.6. The steel sheet has microstructures that do not contain a pearlite microstructure.

Abstract: A steel sheet for cans that has a yield stress of at least 500 Mpa after coating and baking and a method for manufacturing the steel sheet for cans are provided. The steel sheet for cans contains, on the basis of mass percent, C: more than 0.02% but 0.10% or less, Si: 0.10% or less, Mn: 1.5% or less, P: 0.20% or less, S: 0.20% or less, Al: 0.10% or less, N: 0.0120% to 0.0250%, dissolved N being 0.0100% or more, and a remainder of Fe and incidental impurities. A high-strength material can be obtained by maintaining the absolute quantity of dissolved N at a certain value or more and performing hardening by quench aging and strain aging, for example, in a printing process, a film lamination process, or a drying and baking process performed before can manufacturing. In the manufacture, hot rolling is performed at a slab extraction temperature of 1200° C. or more and a finish rolling temperature of (Ar3 transformation temperature—30)° C. or more, and coiling is performed at 650° C. or less.

Abstract: A DI forming water-based coolant of a laminated metal sheet includes at least one kind of base (a) selected from alkanolamines and alkali metal hydroxides, a fatty acid (b), and water (c), wherein the total content of the base (a) and the fatty acid (b) is 0.02 to 4% by mass and the ratio of a straight-chain fatty acid having a carbon number of 6 to 12 in the fatty acid (b) is 80 to 100% by mass.