| 摘要 |
In a rolling bearing in which at least one of an inner race, outer race and rolling elements is made of an alloy steel containing 0.2 to 1.0 wt% of carbon, 3.0 to 14.0 wt% of chromium, 0.8 to 3.0 wt% of vanadium, and up to 3.0 wt% molybdenum, the balance being iron, the part being carburized or carbonitrided, followed by hardening and tempering to secure that the surface carbon concentration C% and the concentrations Cr% + V% of chromium and vanadium, respectively, satisfy a relationship of C% </= 0.13 (Cr% + V%) + 1.10 and that carbides have an area coverage of 15 to 50%. The rolling bearing has an extended service life even if it is used under lubrication in the presence of foreign matter and exhibits superior wear resistance to be hard to wear even if an oil film breakage occurs. <IMAGE>
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