发明公开
- 专利标题： COLD-ROLLED STEEL PLATE, GALVANIZED COLD-ROLLED STEEL PLATE, AND METHOD FOR MANUFACTURING SAID PLATES
- 专利标题（中）： 冷轧钢板，镀锌冷轧钢板及其制造方法，所述板
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申请号： EP14819768.4申请日： 2014-07-01
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公开(公告)号： EP3018230A1公开(公告)日： 2016-05-11
- 发明人: KAWASAKI, Kaoru , KAMEDA , Masaharu , SANO, Kohichi , OKAMOTO, Riki
- 申请人： Nippon Steel & Sumitomo Metal Corporation
- 申请人地址： 6-1, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8071 JP
- 专利权人： Nippon Steel & Sumitomo Metal Corporation
- 当前专利权人： Nippon Steel & Sumitomo Metal 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 Patentanwälte Rechtsanwälte mbB
- 优先权： JP2013138313 20130701; JP2014070351 20140328
- 国际公布： WO2015002190 20150108
- 主分类号： C22C38/00
- IPC分类号： C22C38/00 ; C21D9/46 ; C22C38/22 ; C22C38/54 ; C23C2/06 ; C23C2/28 ; C23C2/40
摘要：
A cold-rolled steel sheet includes a predetermined chemical composition, and includes a structure expressed by: an area fraction of ferrite: 95% or more; an area fraction of retained austenite and an area fraction of martensite: 1% to 3% in total; a product of the area fraction of retained austenite and a carbon concentration in retained austenite: 1 or more; a value of I(111)/{I(100) + I(110)} at a region where a depth from a surface is 1/4 of a thickness of the cold-rolled steel sheet when intensity of a (hkl) plane is expressed by I(hkl): 2 or less.
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