CONSTITUENT MEMBER OF BEARING, PROCESS FOR PRODUCTION OF SAME, AND BALL-AND-ROLLER BEARING PROVIDED WITH THE CONSTITUENT MEMBER

摘要

There is provided a bearing constituent member capable of achieving a long life of a rolling bearing and securing sufficient static loading capacity and dimensional stability and a production process thereof as well as a rolling bearing having a long life and exhibiting sufficient static loading capacity and dimensional stability. A workpiece obtained from a steel containing 3.2 to 5.0% by mass of Cr and 0.05% by mass or more to less than 0.5% by mass of V is subjected to a heat treatment such as a carbonitriding treatment. Thereby, the following are achieved: the content of C in the surface layer ranging from the surface of the bearing constituent member of the rolling bearing to 10 µm is 1.1 to 1.6% by mass, Vickers hardness at the position of a depth of 50 µm from the surface is 740 to 900 (Rockwell C hardness is 62 to 67), the y amount at the position of a depth of 10 µm from the surface is 20 to 55% by volume, particles composed of vanadium nitride having a particle diameter of 0.2 to 2 µm and/or particles composed of vanadium carbonitride having a particle diameter of 0.2 to 2 µm are present in the surface layer ranging from the surface to 10 µm, and the area ratio of the particles in the surface layer ranging from the surface to 10 µm is 1 to 10%.