| 摘要 |
<p>The centerline average roughness of the raceway surface of at least the fixed ring of the bearing rings is controlled to be 0.025-0.075 μmRa, thereby suppressing the rotation of the rolling elements so as to prevent flaking that is accompanied by a structural change. This enables prolongation of the life of bearings. Further, at least the fixed ring of the bearing rings contains, as alloy components, 0.50-1.20% by mass of carbon, 0.10-1.50% by mass of silicon, 0.1-2.0% by mass of manganese, 3.0-6.0% by mass of chromium, 2.0% or below by mass of molybdenum, and 1.0% or below by mass of vanadium, whereby the necessary hardness is obtained and the structure is stabilized. This enables prolongation of the life of bearings.</p> |
