Invention Grant
- Patent Title: High strength galvannealed steel sheet with excellent appearance and method for manufacturing the same
- Patent Title (中): 具有优异外观的高强度合金化热镀锌钢板及其制造方法
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Application No.: US13057331Application Date: 2009-07-28
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Publication No.: US09200352B2Publication Date: 2015-12-01
- Inventor: Hayato Saito , Hiromi Yoshida , Takeshi Yokota , Yasushi Tanaka
- Applicant: Hayato Saito , Hiromi Yoshida , Takeshi Yokota , Yasushi Tanaka
- Applicant Address: JP
- Assignee: JFE Steel Corporation
- Current Assignee: JFE Steel Corporation
- Current Assignee Address: JP
- Agency: DLA Piper LLP (US)
- Priority: JP2008-201736 20080805
- International Application: PCT/JP2009/063715 WO 20090728
- International Announcement: WO2010/016447 WO 20100211
- Main IPC: B32B15/01
- IPC: B32B15/01 ; B32B15/00 ; C23C2/00 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/08 ; C22C38/16 ; C22C38/60 ; C21D8/04 ; C22C38/14 ; C23C2/02 ; C23C2/06 ; C23C2/28

Abstract:
A high strength galvanized steel sheet with excellent appearance that does not have non-uniformity of coating or coating defects or allow linear defects to occur after press forming includes a steel sheet having a ferrite single-phase structure and having a composition containing 0.0005% to 0.0040% by mass of C; 0.1% to 1.0% by mass of Si; 1.0% to 2.5% by mass of Mn; 0.01% to 0.20% by mass of P; 0.015% by mass of less of S; 0.01% to 0.10% by mass of Al; 0.0005% to 0.0070% by mass of N; 0.010% to 0.080% by mass of Ti; 0.0005% to 0.0020% by mass of B; 0.05% to 0.50% by mass of Cu; 0.03% to 0.50% by mass of Ni; and the balance of Fe and incidental impurities.
Public/Granted literature
- US20110139316A1 HIGH STRENGTH GALVANNEALED STEEL SHEET WITH EXCELLENT APPEARANCE AND METHOD FOR MANUFACTURING THE SAME Public/Granted day:2011-06-16
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