| 摘要 |
PROBLEM TO BE SOLVED: To provide rolling bearing parts for high temp. use having an excellent rolling fatigue life even in foreign matter-intruded environments and high temp. environments and more inexpensive compared to the conventional example. SOLUTION: This rolling bearing parts for high temp. use having an inner ring, an outer ring and a rolling element are composed of steel contg. alloy elements of 0.6 to 1.3% C, 0.3 to 3.0% Si, 0.2 to 1.5% Mn, <=0.03% P, <=0.03% S, 0.5 to 3.0% Cr, 0.05 to <0.25% Mo, <=0.050% Al, <=0.003% Ti, <=0.0015% O, <=0.015% N, and the balance Fe with inevitable impurities, also have composition of being subjected to tempering treatment after quenching treatment or carbo-nitriding treatment, in which temper hardness is controlled to >=58 HRC, and also, the maximum carbide dimensions are controlled to <=8 μm. |
