ROLLING BEARING, ROLLING BEARING FOR AUTOMOBILE ELECTRICAL AUXILIARY EQUIPMENT, AND ROLLING BEARING FOR SPEED INCREASING/DECREASING MACHINE

摘要

To provide a rolling bearing that can suppress the occurrence of hydrogen embrittlement associated with penetration of hydrogen from the surface.SOLUTION: A rolling bearing pertaining to one embodiment has an inner ring, an outer ring, and a rolling element disposed between the inner ring and outer ring. The inner ring, outer ring and rolling element are made from steel. The raceway surfaces of the inner ring and outer ring and/or the raceway surface of the rolling element is provided with a quench hardened layer. A hydrogen diffusion coefficient in the quench hardened layer is less than 2.6×10m/s.SELECTED DRAWING: Figure 5