发明授权
- 专利标题: Hot dip galvannealed steel sheet and method for producing the same
- 专利标题(中): 热浸镀锌合金钢板及其制造方法
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申请号: US13743790申请日: 2013-01-17
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公开(公告)号: US09334555B2公开(公告)日: 2016-05-10
- 发明人: Kiyokazu Ishizuka , Kazumi Nishimura , Ikuo Kikuchi , Akihiro Miyasaka
- 申请人: NIPPON STEEL & SUMITOMO METAL CORPORATION
- 申请人地址: JP Tokyo
- 专利权人: NIPON STEEL & SUMITOMO METAL CORPORATION
- 当前专利权人: NIPON 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: JP2005-121831 20050420; JP2005-239384 20050822
- 主分类号: C23C2/02
- IPC分类号: C23C2/02 ; C23C2/06 ; C23C2/28
摘要:
Exemplary embodiments of the present invention can provide a hot dip galvannealed steel sheet which has excellent corrosion resistance, workability, coatability and appearance. The exemplary galvannealed sheet can include an ultra-low carbon steel sheet having a plating layer which includes about 8 to 13% Fe, about 0.05 to 1.0% Ni, about 0.15 to 1.5% Al, and a balance of Zn and unavoidable impurities. An exemplary method for producing a hot dip galvannealed steel sheet is also provided which can include cleaning an annealed ultra-low carbon steel sheet, preplating it with Ni, rapidly heating the sheet in a nonoxidizing or reducing atmosphere, plating the sheet in a galvanization bath containing Al, wiping it, then rapidly reheating it and either cooling the sheet without any soaking time or soaking and holding it for less than 15 seconds and then cooling it.
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