发明名称 |
EXCELLENT WORKABILITY STEEL WIRE ROD AND METHOD FOR PRODUCTION OF SAME |
摘要 |
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. |
申请公布号 |
US2017101696(A1) |
申请公布日期 |
2017.04.13 |
申请号 |
US201515127142 |
申请日期 |
2015.03.20 |
申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
OOBA Hiroshi;TAKAHASHI Yukihiro;NISHIKAWA Yoshitaka |
分类号 |
C21D9/52;C22C38/50;C22C38/46;C22C38/44;C21D8/06;C22C38/06;C22C38/04;C22C38/02;C22C38/00;C22C38/54;C22C38/40 |
主分类号 |
C21D9/52 |
代理机构 |
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代理人 |
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主权项 |
1. An excellent workability steel wire rod comprising steel components including, 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 having an inside microstructure including cementite,
wherein 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. |
地址 |
Tokyo JP |