BEARING COMPONENT FOR ELECTRICAL EQUIPMENT AND AUXILIARY MACHINERY, ROLLING BEARING FOR ELECTRICAL EQUIPMENT AND AUXILIARY MACHINERY AND ELECTRICAL EQUIPMENT AND AUXILIARY MACHINERY

摘要

PPROBLEM TO BE SOLVED: To provide a rolling bearing for electrical equipment and auxiliary machinery which suppresses the occurrence of hydrogen embrittlement separation, and has improved dimensional stability, to provide a bearing component for electrical equipment and auxiliary machinery, and to provide electrical equipment and auxiliary machinery having excellent durability. PSOLUTION: An outer ring 11, an inner ring 12 and balls 13 composing a bearing for an alternator is composed of a steel containing 0.7 to 1.2% carbon, 0.1 to 1.1% silicon and 0.25 to 1.5% manganese, and the balance iron with impurities. Then, an outer ring nitrogen-enriched layer 11B, an inner ring nitrogen-enriched layer 12B and a ball nitrogen-enriched layer 13B are respectively formed at regions including an outer ring load rolling surface 11A, an inner ring load rolling surface 12A and a ball load rolling surface 13A. Further, the outer ring nitrogen-enriched layer 11B, the inner ring nitrogen-enriched layer 12B and the ball nitrogen-enriched layer 13B contains a bainite structure, and the amount of retained austenite is suppressed to 5 vol.%. PCOPYRIGHT: (C)2010,JPO&INPIT