发明授权
- 专利标题: Cold-rolled steel sheet, method of producing the same, battery, and method of producing the same
- 专利标题(中): 冷轧钢板,其制造方法,电池及其制造方法
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申请号: US12282538申请日: 2007-03-13
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公开(公告)号: US08388770B2公开(公告)日: 2013-03-05
- 发明人: Nobuko Mineji , Eiko Yasuhara , Reiko Sugihara , Tadashi Inoue
- 申请人: Nobuko Mineji , Eiko Yasuhara , Reiko Sugihara , Tadashi Inoue
- 申请人地址: JP
- 专利权人: JFE Steel Corporation
- 当前专利权人: JFE Steel Corporation
- 当前专利权人地址: JP
- 代理机构: DLA Piper LLP (US)
- 优先权: JP2006-072603 20060316; JP2006-349293 20061226
- 国际申请: PCT/JP2007/055582 WO 20070313
- 国际公布: WO2007/111188 WO 20071004
- 主分类号: C22C38/00
- IPC分类号: C22C38/00 ; C22C38/14
摘要:
A cold-rolled steel sheet has a composition containing, by mass percent, 0.0040% or less of C, 0.02% or less of Si, 0.14% to 0.25% of Mn, 0.020% or less of P, 0.015% or less of S, 0.0040% or less of N, 0.020% to 0.070% of Al, 0.005% to 0.030% of Nb, 0.005% to 0.030% of Ti, (0.0003% to 0.0010% of the equivalent amount of solid solution B (from which the amount of B forming BN has been subtracted)), and the balance composed of Fe and inevitable impurities, wherein even when the rolling reduction of cold rolling is 85% or less, the average grain size of a ferrite structure is reliably 12.0 μm or less, and the relationship −0.20≦Δr≦0.20 can be reliably satisfied and which has an excellent earing property.