发明授权
- 专利标题： High-strength galvanized steel sheet excellent in bendability and manufacturing method thereof
- 专利标题（中）： 弯曲性优异的高强度镀锌钢板及其制造方法
-
申请号： US14234826申请日： 2012-07-27
-
公开(公告)号： US09234268B2公开(公告)日： 2016-01-12
- 发明人: Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Takuya Kuwayama , Shigeru Yonemura
- 申请人： Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Takuya Kuwayama , Shigeru Yonemura
- 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： JP2011-167436 20110729
- 国际申请： PCT/JP2012/069260 WO 20120727
- 国际公布： WO2013/018739 WO 20130207
- 主分类号： B32B15/00
- IPC分类号： B32B15/00 ; C23C2/02 ; C23C2/28 ; B32B15/01 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C21D8/04 ; C21D9/48 ; C21D8/02 ; C23C2/06 ; C23C2/26 ; C22C38/12 ; C22C38/14 ; C22C38/16 ; C22C38/34 ; C22C38/38 ; C22C18/00
摘要：
The present invention provides a high-strength galvanized steel sheet with maximum tensile strength of 900 MPa or more. The high-strength galvanized steel sheet has an alloyed galvanized layer formed on a surface of a base steel sheet containing predetermined amounts of C, Si, Mn, P, S, Al, N, O with a balance being constituted of iron and inevitable impurities, in which in a structure of the base steel sheet, retained austenite is limited to 8% or less in volume fraction, kurtosis K* of the hardness distribution between 2% hardness and 98% hardness is −0.30 or less, a ratio between Vickers hardness of surface layer of the base steel sheet and Vickers hardness of ¼ thickness of the base steel sheet is 0.35 to 0.70, and a content of iron in the alloyed galvanized layer is 8 to 12% in mass %.
公开/授权文献
信息查询
