Within JIS-SUJ2 (SAE52100 equivalent) bearing steel, we have succeeded in producing a prior-austenite grain size of approximately 5 μm in diameter (half that of the conventional grain size). It is believed that the packet or block size of the martensite decreases proportionally with that of the prior-austenite grain size. As a result, during RCF (RCF means Rolling Contact Fatigue, that is the most typical fatigue type of bearings) testing, the grain refined SUJ2 material demonstrated a fatigue life that was twice as long as carbonitrided steel sample under both clean and debris-contaminated lubrication conditions. In addition, the grain refined SUJ2 material was superior in fracture strength and aged dimensional stability. Therefore, it can be surmised that the grain refining of conventional bearing steels is a very useful process in greatly extending fatigue life.


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    Title :

    Improving Rolling Contact Fatigue Life of Bearing Steels Through Grain Refinement


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2004 World Congress & Exhibition ; 2004



    Publication date :

    2004-03-08




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Improving Rolling Contact Fatigue life of Bearmg Steels Through Grain Refinement

    Ooki, C. / Society of Automotive Engineers | British Library Conference Proceedings | 2004


    Improvement of Rolling Contact Fatigue Life of Bearing Steels

    Kashimura, H. / Tsushima, N. | SAE Technical Papers | 1984


    Improvement of Rolling Contact Fatique Life of Bearing Steels

    Kashimura,H. / Tsushima,N. / Jap.Soc.of Lubric.Eng.,JP | Automotive engineering | 1984