| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rolling bearing for suppressing white tissue separation while reducing its cost, even when used under conditions that current flows between an outer ring 3 and an inner ring 5.SOLUTION: The outer ring 3 as part of a ball bearing 1 is formed of steel containing 0.2-0.6 mass% C, 0.1-0.6 mass% Si, 0.6-1.5 mass% Mn, 0.6-1.8 Cr, and Fe and inevitable impurities for the rest, and subjected to either carburizing or nitrocarburizing treatment and tempering treatment. A residual austenite amount on the top surface of an outer ring raceway 2 is 20-45 vol.%, a C+N amount at a position of a depth X being 1% of the diameter of each of balls 6 and 6 is 0.80-2.00 mass%, and compressive residual stress at the position of the depth X with respect to the peripheral direction of the outer ring 3 and that with respect to the axial direction thereof are 100-500 MPa and 50-500 MPa, respectively.</p> |
