Invention Grant
- Patent Title: Steel sheet having excellent image clarity after painting
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Application No.: US16642630Application Date: 2018-09-13
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Publication No.: US11584973B2Publication Date: 2023-02-21
- Inventor: Doo-Jin Paik , Seul-Ki Park , Chung-Won Kim , Jung-Ki Kim , Sung-Il Kim , Hyeon-Seok Hwang , Je-Woong Lee , Jeong-Eun Kim , Cho-Rong Hong
- Applicant: POSCO
- Applicant Address: KR Pohang-si
- Assignee: POSCO
- Current Assignee: POSCO
- Current Assignee Address: KR Pohang-si
- Agency: Cantor Colburn LLP
- Priority: KR10-2017-0117329 20170913,KR10-2017-0117343 20170913,KR10-2017-0178933 20171224
- International Application: PCT/KR2018/010750 WO 20180913
- International Announcement: WO2019/054769 WO 20190321
- Main IPC: C23C2/02
- IPC: C23C2/02 ; C23C2/06 ; C23C2/12 ; C23C2/40 ; C23C16/06 ; B32B15/01 ; C22C38/14 ; C22C38/12 ; C22C38/06 ; C22C38/04 ; C22C38/02 ; C22C38/00 ; C21D6/00 ; C21D8/02 ; C21D9/46 ; C21D1/26 ; C25D3/22 ; C25D3/44 ; C25D5/36 ; C25D7/06 ; C23C30/00 ; B32B15/18 ; B32B15/04

Abstract:
Provided is a steel sheet having excellent image clarity after painting, including: carbon (C): 0.001% to 0.03%, silicon (Si): 0.001% to 0.35%, manganese (Mn): 0.05% to 2.2%, phosphorus (P): 0.003% to 0.1%, sulfur (S): 0.001% or 0.025%, aluminum (Al): 0.01% to 0.1%, nitrogen (N): 0.001% to 0.007%, and a remainder of iron (Fe) and inevitable impurities. The microstructure of the steel sheet mainly is ferrite phases. An R-cube texture of a surface layer of the steel sheet is 5% or less by area %.
Public/Granted literature
- US20200347474A1 STEEL SHEET HAVING EXCELLENT IMAGE CLARITY AFTER PAINTING AND METHOD FOR MANUFACTURING SAME Public/Granted day:2020-11-05
Information query
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