Invention Grant
- Patent Title: Steel sheet having a hot-dip Zn—Al—Mg-based coating film excellent in terms of surface appearance and method of manufacturing the same
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Application No.: US16627456Application Date: 2018-06-06
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Publication No.: US11618938B2Publication Date: 2023-04-04
- Inventor: Hiroki Harada , Kazuhisa Okai , Hiroshi Kajiyama
- Applicant: JFE Steel Corporation
- Applicant Address: JP Tokyo
- Assignee: JFE Steel Corporation
- Current Assignee: JFE Steel Corporation
- Current Assignee Address: JP Tokyo
- Agency: DLA Piper LLP (US)
- Priority: JPJP2017-131676 20170705,JPJP2017-131677 20170705
- International Application: PCT/JP2018/021673 WO 20180606
- International Announcement: WO2019/009003 WO 20190110
- Main IPC: C23C16/00
- IPC: C23C16/00 ; C23C2/06 ; C22C18/04 ; C23C2/28 ; C23C2/40 ; C23C22/78 ; C23C28/00 ; C23C2/26 ; C23C22/42 ; C23C2/14
Abstract:
A steel sheet has a hot-dip Zn—Al—Mg-based coating film, the coating film containing 1 mass % to 22 mass % of Al and 0.1 mass % to 10 mass % of Mg on a surface of the steel sheet, in which an X-ray diffraction peak intensity ratio of a Mg—Zn compound phase in the coating film, that is, MgZn2/Mg2Zn11, is 0.2 or less.
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