Invention Grant
- Patent Title: High-strength hot-dip galvanized steel sheet and method for producing the same
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Application No.: US15106606Application Date: 2014-12-01
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Publication No.: US10227672B2Publication Date: 2019-03-12
- Inventor: Hiroshi Hasegawa , Shinjiro Kaneko , Yoichi Makimizu , Yoshitsugu Suzuki
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2013-260986 20131218
- International Application: PCT/JP2014/005982 WO 20141201
- International Announcement: WO2015/092987 WO 20150625
- Main IPC: C22C38/38
- IPC: C22C38/38 ; C22C38/26 ; C22C38/28 ; C21D9/46 ; C21D8/02 ; C23C2/06 ; C23C2/02 ; C23C2/28 ; C22C38/00 ; C22C38/58 ; B32B15/01 ; C22C38/02 ; C22C38/06 ; C22C38/20 ; C22C38/22 ; C22C38/24 ; C22C38/32 ; C22C38/48 ; C22C38/50 ; C22C38/54 ; C21D1/22 ; C21D6/00

Abstract:
A high-strength hot-dip galvanized steel sheet having a surface coated with a hot-dip galvanized coating, the steel sheet having a chemical composition comprising C: more than 0.10% and less than 0.18%, Si: 0.01 to 1.00%, Mn: 1.5 to 4.0%, P: 0.100% or less, S: 0.020% or less, Al: 0.010 to 0.500%, Cr: 0.010 to 2.000%, Nb: 0.005 to 0.100%, Ti: 0.005 to 0.100%, B: more than 0.0005% and 0.0030% or less, and Fe and incidental impurities, and a method for producing the same. The steel sheet has a microstructure including ferrite having an area fraction in the range of 0 to 10%, martensite having an area fraction in the range of 15 to 60%, tempered martensite having an area fraction in the range of 20 to 50%, and bainitic ferrite having an area fraction in the range of 20 to 50%.
Public/Granted literature
- US20170037488A1 HIGH-STRENGTH HOT-DIP GALVANIZED STEEL SHEET AND METHOD FOR PRODUCING THE SAME Public/Granted day:2017-02-09
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