发明授权
- 专利标题: Rolling member
- 专利标题(中): 滚动会员
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申请号: US09576265申请日: 2000-05-24
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公开(公告)号: US06228184B1公开(公告)日: 2001-05-08
- 发明人: Susumu Tanaka , Kenji Yamamura , Manabu Obori
- 申请人: Susumu Tanaka , Kenji Yamamura , Manabu Obori
- 优先权: JP9-99436 19970416; JP10-40847 19980223
- 主分类号: C22C3818
- IPC分类号: C22C3818
摘要:
An inexpensive rolling apparatus improved in resistance to fretting, acoustic performance, resistance to corrosion, life and workability is provided. At least one of an outer member, an inner member and rolling elements of the apparatus is formed of an alloy steel containing 1.5% by weight or less of C, 10% to 20% by weight of Cr, 0.1% to 0.8% by weight of Mn, 0.1% to 1.0% by weight of Si and less than 0.2% by weight of N, particularly, at least one of the outer member, the inner member and the rolling elements is formed of a martensitic stainless steel containing 0.6% by weight or less of C, 10% to 14% by weight of Cr, 0.1% to 0.8% by weight of Mn, 0.1% to 1.0% by weight of Si, less than 0.2% by weight of N, 0.5% by weight or less of Mo, 0.2% by weight or less of V, and Fe and inevitable components as the balance, wherein the relationship between the content of C and that of Cr satisfies C %≦−0.05 Cr %+1.41; the relationship between a specific relational equation eq1 indicating the content of elements accelerating the conversion of the raw material to ferrite, taken as (eq1)=Cr %+Si %+1.5 Mo %+3.5 V %, and a specific relational equation eq2 indicating the content of elements accelerating the conversion of the raw material to austenite, taken as (eq2)=C %+0.83 N %+0.12 Mn %, satisfies (eq2)≧0.04×(eq1)−0.39, (eq1)≦14.0 and (eq2)≦0.8; and the total content of C and N satisfies C+N≧0.45%.
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