发明申请
- 专利标题: Soft magnetic low-carbon steel excellent in machinability and magnetic characteristic, method of manufacturing the same and method of manufacturing soft magnetic low-carbon part
- 专利标题(中): 软磁性低碳钢的机械加工性和磁特性优良,制造方法和制造软磁性低碳部件的方法
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申请号: US10737764申请日: 2003-12-18
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公开(公告)号: US20050139289A1公开(公告)日: 2005-06-30
- 发明人: Masamichi Chiba , Masato Kaiso
- 申请人: Masamichi Chiba , Masato Kaiso
- 申请人地址: JP Kobe-shi J
- 专利权人: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- 当前专利权人: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- 当前专利权人地址: JP Kobe-shi J
- 主分类号: H01F1/147
- IPC分类号: H01F1/147
摘要:
A soft magnetic low-carbon steel has a chemical composition having a C content of 0.05% by mass or below, Si content of 0.1% or below, a Mn content in the range of 0.10 to 0.50% by mass, a P content of 0.030% by mass or below, a S content in the range of 0.010 to 0.15% by mass, an Al content of 0.01% by mass or below, a N content of 0.005% by mass or below, and an 0 content of 0.02% by mass or below. In the soft magnetic low-carbon steel, Mn/S mass ratio is 3.0 or above, ferrite grain size is 100 μm or above, ferrite grains contain precipitated MnS grains of grain sizes of 0.2 μm or above in a density in the density range of 0.02 to 0.5 grains/μ2m and the precipitated MnS grains have a mean grain size in the range of 0.05 to 4 μm. The soft magnetic low-carbon steel is excellent in cold-rollability and machinability. Steel parts of the soft magnetic low-carbon steel having complicated shapes can be produced at a high yield.