BEARING STEEL HAVING SUPERIOR ROLLING CONTACT FATIGUE LIFE

摘要

A bearing steel excellent in rolling fatigue life which can provide a bearing member used for a rolling bearing (roller bearing and ball bearing) element member and particularly excellent in rolling fatigue life, characterized by containing 0.95 to 1.10 mass% of C, over 1.60 to 3.50 mass% of Cr, up to 0.0015 mass% of O, up to 0.0010 mass% of Sb and the remaining components of Fe and unavoidable impurities, one or at least two components selected from a group consisting of up to 2.5 mass% of Si, up to 2.5 mass% of Mn, up to 2.5 mass% of Mo, up to 3.0 mass% of Ni, up to 1.5 mass% of Nb, up to 1.5 mass% of V, up to 2.0 mass% of Cu and up to 0.08 mass% of Al being permitted to be contained.