- 专利标题： High strength steel sheet and high strength galvanized steel sheet excellent in shapeability and methods of production of same
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申请号： US14235550申请日： 2012-07-27
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公开(公告)号： US09896751B2公开(公告)日： 2018-02-20
- 发明人: Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Yuji Yamaguchi , Natsuko Sugiura
- 申请人： Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Yuji Yamaguchi , Natsuko Sugiura
- 申请人地址： JP Tokyo
- 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： JP Tokyo
- 代理机构： Birch, Stewart, Kolasch & Birch, LLP
- 优先权： JP2011-167722 20110729
- 国际申请： PCT/JP2012/069223 WO 20120727
- 国际公布： WO2013/018722 WO 20130207
- 主分类号： C22C38/38
- IPC分类号： C22C38/38 ; C23C2/06 ; C23C2/28 ; B32B15/01 ; C21D8/02 ; C21D9/46 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/08 ; C22C38/12 ; C22C38/14 ; C22C38/16 ; C22C38/22 ; C22C38/26 ; C22C38/28 ; C22C38/32 ; C22C38/34 ; C23C2/02
摘要：
High strength steel sheet and high strength galvanized steel sheet which are excellent in shapeability which secure a tensile maximum strength 900 MPa or more high strength while obtaining excellent ductility and stretch flangeability, which sheets have predetermined compositions of ingredients, have steel sheet structures which contain volume fraction 1 to 20% of residual austenite phases, and which have martensite transformation points of the residual austenite phases of −60° C. or less.
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