BEARING COMPONENT AND ROLLING BEARING

摘要

According to the present invention, outer layer parts (11B, 12B, 13B) of bearing components (outer ring (11), inner ring (12), and ball (13)) are nitrided, the outer layer parts comprising bearing steel and including an outer ring rolling surface (11A), an inner ring rolling surface (12A), and a rolling contact surface (13A). The nitrogen concentration of the outer layer parts (11B, 12B, 13B) is not less than 0.4% by mass. The surface area ratio of precipitates in internal parts (11C, 12C, 13C) which are not nitrided is not less than 11%.