| 摘要 |
Bearing materials used for rolling bearings, such as roller bearings and ball bearings, and in particular, a bearing material having an extended rolling contact fatigue life. A bearing material having an extended rolling contact fatigu life comprises: 0.95 to 1.10 mass% of C, 0.15 to 0.70 mass% of Si, 1.15 mass% or less of Mn, 0.90 to 1.60 mass% of Cr and 0.025 mass% or less of P, and further 0.025 mass% or less of S and 0.0012 mass% or less of O as elements forming nonmetal inclusions, and the balance being Fe and incidental impurities, and the bearing material further contains 0.020 mass% or less of AlN, or the number of nonmetal sulfide inclusions each having a thickness of 1 mu m or more is 1,200 or less in an observation area of 320 mm<2> for further extending the rolling contact fatigue life. <IMAGE> |
