发明公开
- 专利标题: HIGH-STRENGTH COLD-ROLLED STEEL SHEET, AND PROCESS FOR PRODUCTION THEREOF
- 专利标题(中): 高强度冷轧钢板及其生产方法
-
申请号: EP11737032.0申请日: 2011-01-26
-
公开(公告)号: EP2530179A1公开(公告)日: 2012-12-05
- 发明人: SANO, Kohichi , WAKABAYASHI, Chisato , KAWATA, Hiroyuki , OKAMOTO, Riki , YOSHINAGA, Naoki , KAWASAKI, Kaoru , SUGIURA, Natsuko , FUJITA, Nobuhiro
- 申请人: Nippon Steel Corporation
- 申请人地址: 6-1, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8071 JP
- 专利权人: Nippon Steel Corporation
- 当前专利权人: Nippon Steel Corporation
- 当前专利权人地址: 6-1, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8071 JP
- 代理机构: Vossius & Partner
- 优先权: JP2010135351 20100614; JP2010088737 20100407; JP2010014363 20100126
- 国际公布: WO2011093319 20110804
- 主分类号: C22C38/00
- IPC分类号: C22C38/00 ; B21B3/00 ; C21D9/46 ; C22C38/38 ; C22C38/58 ; C23C2/06 ; C23C2/28 ; C23C2/40
摘要:
A high-strength cold-rolled steel sheet includes, by mass%, C: 0.10% to 0.40%, Mn: 0.5% to 4.0%, Si: 0.005% to 2.5%, Al: 0.005% to 2.5%, Cr: 0% to 1.0%, and a balance of iron and inevitable impurities, in which an amount of P is limited to 0.05% or less, an amount of S is limited to 0.02% or less, an amount ofN is limited to 0.006% or less, the microstructure includes 2% to 30% of retained austenite by area percentage, martensite is limited to 20% or less by area percentage in the microstructure, an average particle size of cementite is 0.01 µm to 1 µm, and 30% to 100% of the cementite has an aspect ratio of 1 to 3.
公开/授权文献
信息查询