Invention Application
- Patent Title: STEEL SHEET AND METHOD FOR PRODUCING SAME
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Application No.: US17428715Application Date: 2020-01-07
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Publication No.: US20220112569A1Publication Date: 2022-04-14
- Inventor: Masahiro KUBO , Hiroyuki KAWATA , Kenichiro OTSUKA , Masafumi AZUMA
- Applicant: NIPPON STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL CORPORATION
- Current Assignee: NIPPON STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Priority: JP2019-025635 20190215
- International Application: PCT/JP2020/000126 WO 20200107
- Main IPC: C21D8/00
- IPC: C21D8/00 ; C22C38/02 ; C22C38/16 ; C22C38/04

Abstract:
A steel sheet includes, as a chemical composition, by mass %: C: 0.0015% to 0.0400%; Mn: 0.20% to 1.50%; P: 0.010% to 0.100%; Cr: 0.001% to 0.500%; Si: 0.200% or less; S: 0.020% or less; sol. Al: 0.200% or less; N: 0.0150% or less; Mo: 0% to 0.500%; B: 0% to 0.0100%; Nb: 0% to 0.200%; Ti: 0% to 0.200%; Ni: 0% to 0.200%; Cu: 0% to 0.100%; and a remainder including iron and impurities, in which a metallographic structure in a surface layer region includes ferrite having a volume fraction of 90% or more, and in the surface layer region, an average grain size of the ferrite is 1.0 μm to 15.0 μm, and a texture in which an XODF{001}/{111}, S as a ratio of an intensity of {001} orientation to an intensity of {111} orientation in the ferrite is 0.30 or more and less than 3.50 is included.
Public/Granted literature
- US12221661B2 Steel sheet and method for producing same Public/Granted day:2025-02-11
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