Invention Grant
- Patent Title: Alloyed hot-dip galvanized steel sheet and method of manufacturing the same
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Application No.: US14438503Application Date: 2013-11-05
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Publication No.: US10167541B2Publication Date: 2019-01-01
- Inventor: Soshi Fujita , Shintaro Yamanaka
- Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2012-244274 20121106
- International Application: PCT/JP2013/079858 WO 20131105
- International Announcement: WO2014/073520 WO 20140515
- Main IPC: B32B15/00
- IPC: B32B15/00 ; C23C2/28 ; C23C2/06 ; C21D9/46 ; C22C18/00 ; C22C38/00 ; C22C38/06 ; C22C38/58 ; B32B15/01 ; C22C38/02 ; C22C38/04 ; C21D6/00 ; C21D8/02 ; C22C38/08 ; C22C38/12 ; C22C38/14 ; C22C38/16 ; C22C38/26 ; C22C38/28 ; C22C38/32 ; C22C38/34 ; C22C38/38 ; C23C2/02

Abstract:
Provided is an alloyed hot-dip galvanized steel sheet including a base steel sheet, the base steel sheet containing a given amount of C, Si, Mn, and other elements. The alloyed hot-dip galvanized steel sheet is provided with an alloyed hot-dip galvanized layer on a surface of the base steel sheet, the alloyed hot-dip galvanized layer containing, in mass %, Fe: more than or equal to 5% and less than or equal to 15%, and having a thickness of more than or equal to 3 μm and less than or equal to 30 μm. The alloyed hot-dip galvanized steel sheet includes an A layer immediately under the surface of the base steel sheet, the A layer being formed in the base steel sheet and having a thickness of more than or equal to 2 μm and less than or equal to 20 μm from the surface of the base steel sheet, containing more than or equal to 50 vol % of a ferrite structure, and containing more than or equal to 90 mass % of unoxidized Fe, less than or equal to 10 mass % of a total of contents of oxides of Fe, Si, Mn, P, S, and Al, and less than 0.05 mass % of C.
Public/Granted literature
- US20150275345A1 ALLOYED HOT-DIP GALVANIZED STEEL SHEET AND METHOD OF MANUFACTURING THE SAME Public/Granted day:2015-10-01
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