发明申请
US20110017363A1 HIGH STRENGTH THIN STEEL SHEET EXCELLING IN WELDABILITY AND PROCESS FOR PRODUCING THE SAME
审中-公开
高强度钢板在焊接性能及其制造方法中的应用
- 专利标题： HIGH STRENGTH THIN STEEL SHEET EXCELLING IN WELDABILITY AND PROCESS FOR PRODUCING THE SAME
- 专利标题（中）： 高强度钢板在焊接性能及其制造方法中的应用
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申请号： US12810852申请日： 2008-08-08
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公开(公告)号： US20110017363A1公开(公告)日： 2011-01-27
- 发明人: Hee Jae Kang , Jin Keun Oh , Kwang Geun Chin , Jong Sang Kim
- 申请人： Hee Jae Kang , Jin Keun Oh , Kwang Geun Chin , Jong Sang Kim
- 申请人地址： KR Pohang
- 专利权人： POSCO
- 当前专利权人： POSCO
- 当前专利权人地址： KR Pohang
- 优先权： KR10-2007-0140446 20071228
- 国际申请： PCT/KR2008/004627 WO 20080808
- 主分类号： C21D8/02
- IPC分类号： C21D8/02 ; C22C38/12 ; C22C38/14
摘要：
Provided are a high strength thin steel sheet having tensile strength of about 800 MPa or more, and a manufacturing method thereof. The thin steel sheet is mainly used for construction materials, home appliances, and automobiles. The thin steel sheet has excellent plating characteristic, welding characteristic, bending workability, and hole expansion ratio. The thin steel sheet includes, in weight %, C: 0.02-0.20%, Si: 1.5% or less, Mn: 1.5-3.0%, P: 0.001-0.10%, S: 0.010% or less, SoLAl: 0.01-0.40%, N: 0.020% or less, Cr: 0.3-1.5%, B: 0.0010-0.0060%, Sb: 0.001-0.10%, and including at least one material selected from the group consisting of Ti: 0.003-0.08%, Nb: 0.003-0.08%, and Mo: 0.003-0.08%, and includes Fe and other inevitable impurities as a remainder. Here, Si, Mn, B, Sb, P, and S meet conditions of 5
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