BEARING STEEL AND INGOT MATERIAL FOR BEARING HAVING EXCELLENT ROLLING CONTACT FATIGUE LIFE CHARACTERISTICS AND METHOD FOR MANUFACTURING THE SAME

摘要

The present invention provides bearing steel, comprising a chemical composition including by mass %, C: 0.56%>=[% C]@0.70%, Si: 0.15%@[% Si]<0.50%, Mn: 0.60%@[% Mn]@1.50%, Cr: 0.50%@[% Cr]@1.10%, Mo: 0.05%@[% Mo]@0.5%, P: [% P]@0.025%, S: [% S]@0.025%, Al: 0.005%@[% Al]@0.500%, O: [% O]@0.0015%, N: 0.0030%@[% N]@0.015%, and remainder as Fe and incidental impurities.