发明授权
- 专利标题： High-strength hot dip galvannealed steel sheet having high powdering resistance and method for producing the same
- 专利标题（中）： 具有高耐粉蚀性的高强度热浸镀锌合金化钢板及其制造方法
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申请号： US12094997申请日： 2006-12-01
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公开(公告)号： US08025982B2公开(公告)日： 2011-09-27
- 发明人: Yuichi Futamura , Michitaka Tsunezawa , Masaaki Miura , Hiroshi Irie , Takatoshi Yoshida , Masafumi Shimizu
- 申请人： Yuichi Futamura , Michitaka Tsunezawa , Masaaki Miura , Hiroshi Irie , Takatoshi Yoshida , Masafumi Shimizu
- 申请人地址： JP Kobe-shi
- 专利权人： Kobe Steel, Ltd.
- 当前专利权人： Kobe Steel, Ltd.
- 当前专利权人地址： JP Kobe-shi
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权： JP2005-352291 20051206
- 国际申请： PCT/JP2006/324114 WO 20061201
- 国际公布： WO2007/066600 WO 20070614
- 主分类号： B32B15/04
- IPC分类号： B32B15/04 ; B32B15/18 ; B32B15/20 ; B05D1/18 ; B05D3/02 ; C21D1/70 ; C21D11/00
摘要：
Disclosed is a high-strength hot dip galvannealed steel sheet having high powdering resistance produced by employing such a constitution that a Fe—Zn alloy plated layer is provided on at least one side of a basis steel sheet and a region in which Al (atomic %)/Zn (atomic %)≧0.10 is present in a thickness of 300 Å or more from the surface of the plated layer along the depth direction of the plated layer. Also disclosed is a hot dip galvannealed steel sheet whose formability is greatly improved by optionally specifying chemical composition and structure of the basis steel sheet.
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