Claims
- 1. A rolling bearing having a plurality of rolling members comprising an outer race and an inner race or a shaft element, and a plurality of rolling elements disposed between the outer race and the inner race or the shaft element, wherein at least one of the rolling elements is formed of a secondary hardenable steel having a hardness of 57 or more in HRC, secondary hardenability and a nitride layer of 2% or less of a diameter Da of the rolling element on a surface layer of a finished article, said nitride layer being formed by nitriding at a temperature 480° C. or less.
- 2. The rolling bearing of claim 1, wherein at least one of the rolling elements is formed of a secondary hardenable steel having a hardness of 57 or more in HRC, secondary hardenability and a nitride layer of 2% or less of a diameter Da of the rolling element on a surface layer of a finished article and containing 0.45% by weight or less of C, 12.0% to 13.5% by weight of Cr, 0.1% to 0.8% by weight of Mn, 0.1% to 1.0% by weight of Si, 0.05% to 0.5% by weight of N and 3.0% by weight or less of Mo, wherein C+N is 0.5% by weight or more, and a fine carbide having a particle size of 2.0 μm or less is dispersed the nitride layer.
Priority Claims (2)
Number |
Date |
Country |
Kind |
9-99436 |
Apr 1997 |
JP |
|
10-40847 |
Feb 1998 |
JP |
|
Parent Case Info
This is a divisional of Application Ser. No. 09/060,810 filed Apr. 16, 1998, the disclosure of which is incorporated herein by reference.
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