| 摘要 |
A high-carbon and long-life bearing steel which exhibits an excellent rolling fatigue resistance when used as a bearing part, which contains 0.70-1.20 % of C, 0.15-1.70 % of Si, 0.15-1.20 % of Mn, 0.15-2.00 % of Cr, 0.05-1.50 % of Mo, 0.001-0.03 % of S, 0.010-0.05 % of Al, 0.003-0.015 % of N, and 0.0005-0.0300 % of T.Mg, wherein the contents of P, Ti and T.O are limited to, respectively, not more than 0.025 %, 0.0040 % and 0.0015 %, and/or which contains at least one element of V, Nb and Ni in a specified amount, and/or wherein the ratio of the number of magnesium oxide particles to the total number of oxide particles is at least 0.8. |
