发明授权
- 专利标题: Free-cutting structural steel for machines
- 专利标题(中): 机械自由切割结构钢
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申请号: US761954申请日: 1977-01-24
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公开(公告)号: US4115111A公开(公告)日: 1978-09-19
- 发明人: Tetsuro Itoh , Tetsuo Takahashi , Atsuyoshi Kimura , Seiichi Yamano
- 申请人: Tetsuro Itoh , Tetsuo Takahashi , Atsuyoshi Kimura , Seiichi Yamano
- 申请人地址: JPX Nagoya
- 专利权人: Daido Tokushuko Kabushiki Kaisha
- 当前专利权人: Daido Tokushuko Kabushiki Kaisha
- 当前专利权人地址: JPX Nagoya
- 优先权: JPX48/127478 19731113
- 主分类号: C22C38/60
- IPC分类号: C22C38/60
摘要:
The present invention relates to a free-cutting structural steel for machines characterized by containing a range of 30-100 g/steel ton of oxide inclusions mainly composed of SiO.sub.2 40-60%, CaO 13-30% and Al.sub.2 O.sub.3 25-40%, the balance being less than 20% of other oxides and calcium 0.0002-0.0010%, and at least one of the following elements; lead 0.03-0.30% and sulfur 0.035-0.10%.
公开/授权文献
- US4621476A Grounding electrode 公开/授权日:1986-11-11
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