Invention Grant
- Patent Title: Hot-rolled steel sheet
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Application No.: US15551863Application Date: 2016-02-22
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Publication No.: US10752972B2Publication Date: 2020-08-25
- Inventor: Natsuko Sugiura , Mitsuru Yoshida , Hiroshi Shuto , Tatsuo Yokoi , Masayuki Wakita
- Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL CORPORATION
- Current Assignee: NIPPON STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@d4a388b
- International Application: PCT/JP2016/055074 WO 20160222
- International Announcement: WO2016/136672 WO 20160901
- Main IPC: C21D9/46
- IPC: C21D9/46 ; C21D8/02 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/08 ; C22C38/12 ; C22C38/14 ; C22C38/16 ; C22C38/26 ; C22C38/28

Abstract:
A hot-rolled steel sheet includes a predetermined chemical composition, and a structure which includes, by area ratio, a ferrite in a range of 5% to 60% and a bainite in a range of 30% to 95%, in which in the structure, in a case where a boundary having an orientation difference of equal to or greater than 15° is defined as a grain boundary, and an area which is surrounded by the grain boundary and has an equivalent circle diameter of equal to or greater than 0.3 μm is defined as a grain, the ratio of the grains having an intragranular orientation difference in a range of 5° to 14° is, by area ratio, in a range of 20% to 100%.
Public/Granted literature
- US20180037967A1 HOT-ROLLED STEEL SHEET Public/Granted day:2018-02-08
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