| abstract |
An object of the present invention is to provide a bearing component that is inexpensive and has improved yield strength and life, and a rolling bearing including the bearing component. Bearing parts (outer ring 11, inner ring 12 and ball 13) are made of bearing steel, and outer layer rolling surface 11A and inner ring rolling surface 12A or surface layer portions 11B, 12B and 13B including rolling surface 13A are nitrided. Has been. The nitrogen concentration in the surface layer portions 11B, 12B, and 13B is 0.4% by mass or more. The area ratio of precipitates in the non-nitrided interiors 11C, 12C, and 13C is 11% or more. [Selection] Figure 2 |