| 摘要 |
PROBLEM TO BE SOLVED: To provide a carburized bearing component having excellent wear resistance and seizure resistance and having a rolling fatigue life even under the condition where contact fatigue accompanied by slipping lies or in a environment where lubricating oil is dilute. SOLUTION: The bearing steel component is obtained by forming a steel having an alloy composition comprising, by weight, 0.1 to <0.3% C, 0.4 to 2% Si,≤1.5% Mn,≤0.03% P,≤0.03% S, 0.3 to 2.5% Cr and 0.005 to 0.050% Al, and comprising≤0.003% Ti,≤0.0015% O and≤0.025% N, and the balance substantially Fe into a component shape. Its surface hardness after carburizing quenching and tempering or carbonitriding quenching and tempering treatment is≥58 HRC, and 300°C tempering softening resistance defined as (the surface hardness after carburizing quenching and tempering or carbonitriding quenching and tempering treatment)-(the surface hardness after tempering treatment at 300°C) is≤130 Hv. COPYRIGHT: (C)2006,JPO&NCIPI
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