Invention Grant
- Patent Title: Excellent workability steel wire rod and method for production of same
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Application No.: US15127142Application Date: 2015-03-20
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Publication No.: US10221464B2Publication Date: 2019-03-05
- Inventor: Hiroshi Ooba , Yukihiro Takahashi , Yoshitaka Nishikawa
- 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: JP2014-058420 20140320
- International Application: PCT/JP2015/058566 WO 20150320
- International Announcement: WO2015/141840 WO 20150924
- Main IPC: C22C38/02
- IPC: C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/40 ; C22C38/44 ; C22C38/46 ; C22C38/50 ; C22C38/54 ; C21D9/52 ; C21D8/06 ; C22C38/00 ; C22C38/18 ; C21D1/46

Abstract:
The present invention provides a steel wire rod with stable workability. The steel wire rod has steel components containing, by mass %, C: 0.20 to 0.60%, Si: 0.15 to 0.30%, Mn: 0.25 to 0.60%, P: ≤0.020%, S: ≤0.010%, and a balance of Fe and unavoidable impurities, and an internal microstructure including cementite, in which by number ratio, 80% or more of the cementite in a cross-section vertical to a longitudinal direction of the wire rod has a short axis of 0.1 μm or less and a ratio of a long axis to the short axis, defined as an aspect ratio, of 2.0 or less.
Public/Granted literature
- US20170101696A1 EXCELLENT WORKABILITY STEEL WIRE ROD AND METHOD FOR PRODUCTION OF SAME Public/Granted day:2017-04-13
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