发明授权
- 专利标题: Bearing steel and rolling bearing made thereof
- 专利标题(中): 轴承钢和滚动轴承制成
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申请号: US594369申请日: 1990-10-09
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公开(公告)号: US5298323A公开(公告)日: 1994-03-29
- 发明人: Hiroshi Narai , Tsutomu Abe , Shigeru Okita
- 申请人: Hiroshi Narai , Tsutomu Abe , Shigeru Okita
- 申请人地址: JPX Tokyo
- 专利权人: Nippon Seiko Kabushiki Kaisha
- 当前专利权人: Nippon Seiko Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX1-264792 19891011; JPX2-73117 19900322; JPX2-202836 19900731
- 主分类号: C22C32/00
- IPC分类号: C22C32/00 ; F16C33/30 ; F16C33/62 ; B32B18/00
摘要:
A long-life bearing steel and a long-life rolling bearing made of the steel are disclosed. In the steel, the number of oxide or oxide-based inclusion particles in a given unit area A of 160 mm.sup.3 with an average particle size of 3 to 30 .mu.m is 80 or less and an abundance of oxide or oxide-base inclusion particles with 10 .mu.m or more average particle size to oxide or oxide-based inclusion particles having an average particle size of 3 to 30 .mu.m is below 2%. An electron beam melting extraction evaluation method irradiating electron beam under the following condition guarantees the cleanness of the steel: 350 V+100.ltoreq.J.ltoreq.700 V+200, wherein J represents electric charge power in W provided by electron beam and V represents a sample volume in cm.sup.3.
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