| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bearing material capable of suppressing the shortening of a rolling fatigue life caused by the internal starting point type peeling and surface starting point type peeling of a rolling bearing, and to provide a rolling bearing capable of reducing bearing torque and a dust generation phenomenon. <P>SOLUTION: The rolling bearing 1 is constructed in such a manner that hardness at the depth position of 50 μm from the rolling surface of a rolling body is higher than that at the depth position of 50 μm from the track surface of a track ring, its difference is 50 to 150 at Vickers hardness (HV), the compression residual stress of the rolling surface of the rolling body is largest at the uppermost surface and continuously reduced in a depth direction, the maximum value of the compression residual stress is 600 MPa or higher, an inner ring and an outer ring are made of SUJ 2 steel, and a parameter A is 52 to 58%, wherein D is a bearing outer diameter, d is a bearing inner diameter, Da is a ball diameter of the rolling body, Z is the number of rolling bodies, an average bearing diameter dm is represented by (D+d)/2 and the parameter A is represented by Da×Z/(π×dm). <P>COPYRIGHT: (C)2012,JPO&INPIT |
