| 摘要 |
This bearing steel, which can exert favorable cold working properties during cold working that is conducted after globularizing annealing, and which can also secure favorable rolling fatigue characteristics and abrasion resistance as a bearing member or the like, contains 0.9-1.10% C, 0.05-0.49% Si, 0.1-1.0% Mn, no greater than 0.05% P (but does not contain 0%), no greater than 0.05% S (but does not contain 0%), 0.03-0.40% Cr, no greater than 0.05% Al (but does not contain 0%), 0.002-0.025% N, no greater than 0.0030% Ti (but does not contain 0%), and no greater than 0.0025% O (but does not contain 0%), the remainder comprising iron and unavoidable impurities, the average aspect ratio of cementite is no greater than 2.00, the average circle equivalent diameter of cementite is 0.35-0.6 µm, and the number density of cementite having a circle equivalent diameter of at least 0.13 µm is at least 0.45/µm2. |
