Invention Application
- Patent Title: COATED STEEL PRODUCT
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Application No.: US17619268Application Date: 2020-04-16
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Publication No.: US20220356547A1Publication Date: 2022-11-10
- Inventor: Kohei TOKUDA , Mamoru SAITO , Jun MAKI , Takuya MITSUNOBU , Yasuto GOTO
- Applicant: NIPPON STEEL CORPORATION
- Applicant Address: JP Chiyoda-ku, Tokyo
- Assignee: NIPPON STEEL CORPORATION
- Current Assignee: NIPPON STEEL CORPORATION
- Current Assignee Address: JP Chiyoda-ku, Tokyo
- Priority: JP2019-119451 20190627
- International Application: PCT/JP2020/016794 WO 20200416
- Main IPC: C22C18/04
- IPC: C22C18/04 ; B32B15/01 ; C23C2/06 ; C23C2/40

Abstract:
A hot-dip coated steel product including: a steel product; and a coating layer including a Zn—Al—Mg alloy layer disposed on a surface of the steel product, in which the Zn—Al—Mg alloy layer includes a Zn phase, an Al phase, and a MgZn2 phase, and contains a Mg—Sn intermetallic compound phase in the Zn phase, and the coating layer has a chemical composition satisfying a predetermined average composition, a total area proportion of the Al phase and the MgZn2 phase is 70% or more, an area proportion of the Zn phase is 30% or less, an average value of cumulative circumferential lengths of the Al phase is less than 88 mm/mm2, and a total frequency in number of the Al phase having a circumferential length of 50 μm or more is less than 100.
Public/Granted literature
- US11634791B2 Coated steel product Public/Granted day:2023-04-25
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