Patent application number | Description | Published |
20100025283 | Laminated steel sheet for two-piece can body, two-piece can body made of laminated steel sheet, and method of producing the two-piece can body - Provided is a laminated steel sheet for a can body of a two-piece can, containing a copolyethylene terephthalate resin layer containing at least one member selected from the group consisting of isophthalic acid and cyclohexane dimethanol as a copolymer component in a proportion of 5 to 20 mol % and having a crystallization temperature of 120° C. to 140° C. on at least one side of a steel sheet; and satisfying the following relationships: r | 02-04-2010 |
20110076177 | HIGH-STRENGTH STEEL SHEET FOR CANS AND METHOD FOR MANUFACTURING THE SAME - 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. | 03-31-2011 |
20110108168 | HIGH-STRENGTH STEEL SHEET FOR CAN AND METHOD FOR MANUFACTURING SAME - 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. | 05-12-2011 |
20120255656 | STEEL SHEET FOR CAN HAVING EXCELLENT SURFACE ROUGHENING RESISTANCE AND MANUFACTURING METHOD THEREOF - 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 μm or more and 10 μm 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 μm or less. The average ferrite grain size in the cross section in the rolling direction in the region ranging from the surface layer of the steel sheet to the position ¼ of a sheet thickness away from the surface layer of the steel sheet is set smaller than the average ferrite grain size in the cross section in the rolling direction in a region ranging from the position ¼ sheet thickness away from the surface layer of the steel sheet to the sheet thickness center portion of the steel sheet. The steel sheet for cans is obtained by cooling a steel sheet at 50 to 100° C./s within 1 second after final finish rolling, is wound at 500° C. to 600° C., is subsequently subjected to pickling treatment, is subjected to cold rolling at a reduction rate of 90% or more, and is subjected to continuous annealing at a temperature of equal to more than a recrystallization temperature to 800° C. or below. | 10-11-2012 |
20130119057 | TWO-PIECE CAN BODY MADE OF LAMINATED STEEL SHEET, AND METHOD OF PRODUCING THE TWO-PIECE CAN BODY - A can body for a two-piece can made of a laminated steel sheet, the laminated steel sheet containing a steel sheet and a copolyethylene terephthalate resin layer containing at least one member selected from the group consisting of isophthalic acid and cyclohexane dimethanol as a copolymer component in a proportion of 5 to 20 mol %, and having a crystallization temperature of 120° C. to 140° C. on at least one side of the steel sheet; and satisfying the following relationships: r | 05-16-2013 |
20140174609 | METHOD FOR MANUFACTURING A HIGH-STRENGTH STEEL SHEET FOR A CAN - A method for manufacturing a high-strength steel sheet for a can, including (a) hot rolling a steel slab at a slab extraction temperature of 1200° C. or more and a finish rolling temperature of (Ar3 transformation temperature−30)° C. or more, the steel slab containing, on the basis of mass percent, more than 0.02%, but 0.10% or less of C, 0.10% or less of Si, 1.5% or less of Mn, 0.20% or less of P, 0.20% or less of S, 0.10% or less of Al, 0.0120% to 0.0250% of N, and the balance being Fe and incidental impurities; (b) coiling at a temperature of 650° C. or less; (c) pickling; (d) carrying out a first cold rolling; (e) continuously annealing; and (f) carrying out a second cold rolling at a reduction ratio of 10% or more and less than 20%. | 06-26-2014 |
20150136635 | THREE-PIECE CAN AND METHOD OF MANUFACTURING THE SAME - A three-piece can includes a can body obtained by forming a steel sheet such that a roundness of the can is 0.34 mm or less. The steel sheet contains: by mass %, C: 0.020% or more and 0.100% or less; Si: 0.10% or less; Mn: 0.10% or more and 0.80% or less; P: 0.001% or more and 0.100% or less; S: 0.001% or more and 0.020% or less; Al: 0.005% or more and 0.100% or less; and N: 0.0130% or more and 0.0200% or less. The balance is Fe and inevitable impurities. The steel sheet has a yield strength of 440 MPa or more and a total elongation of 12% or more. | 05-21-2015 |
20150299828 | STEEL SHEET FOR THREE-PIECE CAN AND METHOD FOR MANUFACTURING THE SAME - Provided are a steel sheet for a can having high buckling strength for a can body against an external force and excellent formability when being formed into a shape having a design effect by additionally giving elongation strain in the circumferential direction after the steel sheet having been formed into a cylindrical shape and a method for manufacturing the steel sheet. The chemical composition is controlled to contain, by mass %, C: 0.0005% or more and 0.0035% or less, Si: 0.050% or less, Mn: more than 0.60% and 1.00% or less, P: 0.030% or less, S: 0.020% or less, Al: 0.010% or more and 0.100% or less, N: 0.0030% or less, B: 0.0005% or more, and the balance being Fe and inevitable impurities, in which the relationship B/N≧0.50 is satisfied where B/N represents | 10-22-2015 |