Invention Publication
- Patent Title: MICROCRACK-REDUCED, HOT PRESS-FORMED ARTICLE, AND METHOD FOR MANUFACTURING SAME
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Application No.: US18385162Application Date: 2023-10-30
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Publication No.: US20240082902A1Publication Date: 2024-03-14
- Inventor: Hyeon-Seok Hwang , Il-Ryoung Sohn , Jong-Sang Kim
- Applicant: POSCO CO., LTD
- Applicant Address: KR Pohang-si
- Assignee: POSCO CO., LTD
- Current Assignee: POSCO CO., LTD
- Current Assignee Address: KR Pohang-si
- Priority: KR 20150186107 2015.12.24
- The original application number of the division: US16064785 2018.06.21
- Main IPC: B21D22/02
- IPC: B21D22/02 ; B21D22/20 ; C21D1/673 ; C21D8/00 ; C23C2/06 ; C23C2/26 ; C23C2/28 ; C23C2/40

Abstract:
Disclosed are a hot press-formed article and a method for manufacturing the same. The article is manufactured by hot press forming a galvanized steel sheet comprising a base steel plate and a zinc-based coat layer formed on a surface of the base steel plate, wherein the zinc-based coat layer contains at least one element selected from the group consisting of Sb, Sn, and Bi in a total amount of 0.05% to 2.0% by weight, and a balanced amount of Zn and inevitable impurities, at least 70% by weight of the at least one element selected from the group consisting of Sb, Sn, Bi being concentrated in a region 3 μm or less distant from the surface of an alloyed zinc-based coat layer, formed by alloying the zinc-based coat layer, of the hot press-formed article.
Public/Granted literature
- US3198211A Multi-way valve unit having particular o-ring valve and seat structure Public/Granted day:1965-08-03
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