Invention Grant
- Patent Title: Hot-rolled steel sheet and method for producing same
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Application No.: US15460024Application Date: 2017-03-15
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Publication No.: US10167539B2Publication Date: 2019-01-01
- Inventor: Kohichi Sano , Kunio Hayashi , Kazuaki Nakano , Riki Okamoto , Nobuhiro Fujita
- Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2011-117432 20110525
- Main IPC: C22C38/02
- IPC: C22C38/02 ; C22C38/38 ; C21D8/02 ; C21D9/46 ; C22C38/00 ; C22C38/04 ; C22C38/06 ; C22C38/08 ; C22C38/10 ; C22C38/12 ; C22C38/14 ; C22C38/16 ; C22C38/18 ; C22C38/60 ; C22C38/22 ; C22C38/28 ; C22C38/32 ; C21D8/00

Abstract:
A hot-rolled steel sheet wherein an average pole density of orientation group of {100} to {223} is 1.0 to 5.0 and pole density of crystal orientation {332} is 1.0 to 4.0. The hot-rolled steel sheet includes, as a metallographic structure, by area %, 30% to 99% ferrite and bainite in total, and 1% to 70% martensite. The hot-rolled steel sheet satisfies Expression 1: dia≤13 μm, and also satisfies Expression 2: TS/fM×dis/dia≥500, wherein an area fraction of the martensite is defined as fM in unit of area %, an average size of the martensite is defined as dia in unit of μm, an average distance between the martensite is defined as dis in unit of μm, and tensile strength of the steel sheet is defined as TS in unit of MPa.
Public/Granted literature
- US20170191140A1 HOT-ROLLED STEEL SHEET AND METHOD FOR PRODUCING SAME Public/Granted day:2017-07-06
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