发明申请
- 专利标题： HIGH-CORROSION-RESISTANCE HOT-DIP GALVANIZED STEEL SHEET HAVING EXCELLENT APPEARANCE UNIFORMITY AND MANUFACTURING METHOD THEREOF
- 专利标题（中）： 高耐腐蚀热镀锌钢板具有优异的外观均匀性及其制造方法
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申请号： US14127780申请日： 2012-06-29
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公开(公告)号： US20140127531A1公开(公告)日： 2014-05-08
- 发明人: Takeshi Yasui , Tooru Oohashi , Nayuta Kamazu , Satoru Tanaka , Akio Saito
- 申请人： Takeshi Yasui , Tooru Oohashi , Nayuta Kamazu , Satoru Tanaka , Akio Saito
- 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
- 优先权： JP2011-146572 20110630
- 国际申请： PCT/JP2012/066655 WO 20120629
- 主分类号： B32B15/01
- IPC分类号： B32B15/01 ; C23C2/02
摘要：
The present invention provides a high-corrosion-resistance hot-dip galvanized steel sheet having excellent appearance uniformity. The steel sheet includes: a coating layer containing Al: 4 to 22 mass %, Mg: 1 to 6 mass %, and Si: 0.001 to 1 mass %, and a balance being composed of Zn and inevitable impurities formed on a surface, in which at an interface between the coating layer and a base steel sheet, Mg2Si phases and Ca phases each mainly composed of Ca or a Ca compound exist, and at least part of the Mg2Si phases precipitate by using the Ca phases as a nucleus.
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