Claims
- 1. In a rolling bearing comprising an inner race, an outer race and a plurality of rolling elements,
- the improvement wherein at least one member of the inner race, the outer race and the rolling elements is made of an alloy steel comprising:
- 0.2 to 1.0 wt % of C;
- 3.0 to 14.0 wt % of Cr;
- 0. 8 to 3.0 wt % of V;
- at most 3.0 wt % of Mo; and
- the balance being Fe,
- the member satisfying a relationship of:
- C%.ltoreq.0.13 (Cr%+V%)+1.10
- and having carbides existing on a surface of the member have an area fraction of 15 to 50% after a surface layer thereof is carburized or carbonitrided and then hardened or tempered,
- where C% is a surface carbon concentration and Cr% and V% are concentrations of Cr and V respectively.
- 2. In a rolling bearing comprising an inner race, an outer race and a plurality of rolling elements,
- the improvement wherein at least one member of the inner race, the outer race and the rolling elements is made of an alloy steel comprising:
- 0.2 to 1.0 wt % of C;
- 3.0 to 14.0 wt % of Cr;
- 0.8 to 3.0 wt % of V;
- at most 3.0 wt % of Mo; and
- the balance being Fe;
- the member satisfying a relationship of:
- C%.ltoreq.0.13 (Cr%+V%)+1.10
- where C% is a surface carbon concentration and Cr% and V% are concentrations of Cr and V, respectively.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-166735 |
Jul 1994 |
JPX |
|
Parent Case Info
This is a Continuation of application Ser. No. 08/504,781 filed Jul. 19, 1995, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2235212 |
Feb 1991 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
504781 |
Jul 1995 |
|