Invention Grant
- Patent Title: Gold-colored steel sheet and manufacturing method thereof
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Application No.: US16473030Application Date: 2017-05-15
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Publication No.: US11339459B2Publication Date: 2022-05-24
- Inventor: Jung-Hyun Kong , Sang Seok Kim , Mi Nam Park
- Applicant: POSCO
- Applicant Address: KR Pohang-si
- Assignee: POSCO
- Current Assignee: POSCO
- Current Assignee Address: KR Pohang-si
- Agency: Morgan, Lewis & Bockius LLP
- Priority: KR10-2016-0178323 20161223
- International Application: PCT/KR2017/004993 WO 20170515
- International Announcement: WO2018/117346 WO 20180628
- Main IPC: C22C38/00
- IPC: C22C38/00 ; C21D8/02 ; C21D9/46 ; C22C38/02 ; C22C38/04 ; C22C38/48 ; C22C38/50

Abstract:
The present invention discloses a gold-colored steel sheet capable of expressing color without peeling of a modified layer and the gold-colored steel sheet capable of forming a color-modified layer through a conventional annealing process without expensive facilities.
A method of manufacturing the gold-colored steel sheet according to an embodiment of the present invention can form a TiN modified layer on a surface of a steel sheet comprising 0.3 to 1.5 wt % of titanium (Ti) by an annealing treatment in a nitrogen (N2) atmosphere at 900 to 1,200° C. for 30 to 300 seconds.
A method of manufacturing the gold-colored steel sheet according to an embodiment of the present invention can form a TiN modified layer on a surface of a steel sheet comprising 0.3 to 1.5 wt % of titanium (Ti) by an annealing treatment in a nitrogen (N2) atmosphere at 900 to 1,200° C. for 30 to 300 seconds.
Public/Granted literature
- US20200095656A1 GOLD-COLORED STEEL SHEET AND MANUFACTURING METHOD THEREOF Public/Granted day:2020-03-26
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