发明授权
- 专利标题： High carbon steel and production method thereof
- 专利标题（中）： 高碳钢及其生产方法
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申请号： US10665865申请日： 2003-09-19
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公开(公告)号： US07147730B2公开(公告)日： 2006-12-12
- 发明人: Nobuyuki Nakamura , Takeshi Fujita , Katsutoshi Ito , Yasuyuki Takada
- 申请人： Nobuyuki Nakamura , Takeshi Fujita , Katsutoshi Ito , Yasuyuki Takada
- 申请人地址： JP Tokyo
- 专利权人： JFE Steel Corporation
- 当前专利权人： JFE Steel Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Frishauf, Holtz, Goodman & Chick, P.C.
- 优先权： JP2000-018280 20000127
- 主分类号： C21D8/02
- IPC分类号： C21D8/02
摘要：
To provide a high carbon steel sheet having excellent hardenability and toughness, and low planar anisotropy of tensile properties affecting workability, and a method of producing the same.A high car steel sheet having chemical composition specified by JIS G 4051 (Carbon steels for machine structural use), JIS G 4401 (Carbon tool steels) or JIS G 4802 (Cold-rolled steel strips for springs), wherein more than 50 carbides having a diameter of 1.5 μm or larger exist in 2500 μm2, the ratio of number of carbides having a diameter of 0.6 μm or less with respect to all the carbides is 80% or more, and the Δr is more than −0.15 to less than 0.15, herein Δr=(r0+r90−2×r45)/4, and r0, r45, and r90 shows a r-value of the directions of 0° (L), 45° (S) and 90° (C) with respect to the rolling direction respectively.
公开/授权文献
- US20040123924A1 High carbon steel sheet and production method thereof 公开/授权日：2004-07-01
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