| 摘要 |
PROBLEM TO BE SOLVED: To effectively suppress the initial peeling of a rolling bearing for engine auxiliary machinery even if the using environment of the rolling bearing is made severer, and to extend its service life. SOLUTION: At least one selected from an inner ring, an outer ring and rolling elements is formed of a stock composed of steel comprising, by mass, 0.2 to 0.6% C, 2.5 to 7.0% Cr, 0.5 to 2.0% Mn, 0.1 to 1.5% Si, 0.5 to 3.0% Mo,≤2.0% V and≤2.0% Ni, and the balance Fe with inevitable impurities. Then, in the surface layer part forming a rolling face, the total content of C and N is 1.0 to 2.5% by mass ratio, the content of retained austenite is 15 to 45% by volume ratio, hardness is≥60 HRC by Rockwell hardness, and the abundance ratio of precipitates composed of at least one kind selected from carbide and carbonitride in the rolling face is 15 to 35% by area ratio. COPYRIGHT: (C)2006,JPO&NCIPI
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