Invention Grant
- Patent Title: Steel wire rod and method of producing same
- Patent Title (中): 钢丝杆及其制造方法
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Application No.: US14004287Application Date: 2012-03-13
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Publication No.: US09255306B2Publication Date: 2016-02-09
- Inventor: Shingo Yamasaki , Toshiyuki Manabe , Naoshi Hikita
- Applicant: Shingo Yamasaki , Toshiyuki Manabe , Naoshi Hikita
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Kenyon & Kenyon LLP
- Priority: JP2011-056006 20110314
- International Application: PCT/JP2012/056377 WO 20120313
- International Announcement: WO2012/124679 WO 20120920
- Main IPC: C21D8/06
- IPC: C21D8/06 ; C21D8/08 ; C21D9/52 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/08 ; C22C38/14 ; C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/52 ; C22C38/54 ; C22C38/10 ; C22C38/12 ; C22C38/16 ; C22C1/02
Abstract:
A steel wire rod which is a material of steel wires includes, as a metallographic structure, by area %, 95% to 100% of a pearlite, wherein an average pearlite block size at a central portion of the steel wire rod is 1 μm to 25 μm, an average pearlite block size at a surface layer portion of the steel wire rod is 1 μm to 20 μm, and, when a minimum lamellar spacing of the pearlite at the central portion of the steel wire rod is S in unit of nm and when a distance from a peripheral surface of the steel wire rod to a center is r in unit of mm, S
Public/Granted literature
- US20140000767A1 STEEL WIRE ROD AND METHOD OF PRODUCING SAME Public/Granted day:2014-01-02
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