UNSM technology increases surface hardness, induces a large amount of compressive residual stress in the subsurface, refines the grain size into 50∼200 nm, and modifies the surface into micro dimple structure which reduces the friction coefficient about 50% simultaneously. In order to show the possibility of weight and friction reduction at Hub bearing application, hardness, roughness, residual stress, surface topology, friction coefficient and wear rate are compared before and after UNSM treatment of test specimens. Two type of rolling contact fatigue test and pin-on-disc test are carried out for test specimens. Finally dynamo test of hub bearing assembly is being carried out. Test results show that UNSM technology can reduce the weight and friction loss of hub bearing and is very effective technology for fuel consumption and CO2 emissions of vehicle.


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    Titel :

    Nano Surface Modification of Hub Bearing Race Ways for Increasing the Dynamic Load Rating and Decreasing the Friction Loss


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Kim, C. S. (Autor:in) / Jeong, D. H (Autor:in) / Cho, Inho (Autor:in) / Moon, J. G. (Autor:in) / Lee, K. B. (Autor:in) / Jin, S. G. (Autor:in) / Pyoun, Y. S. (Autor:in)

    Kongress:

    Asia Pacific Automotive Engineering Conference ; 2007



    Erscheinungsdatum :

    05.08.2007




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Nano Surface Modification of Hub Bearing Race Ways for Increasing the Dynamic Load Rating and Decreasing the Friction Loss

    Cho, I. / Kim, C. S. / Jin, S. G. et al. | British Library Conference Proceedings | 2007



    Measurement of bearing friction loss under dynamic load

    Ogita,Y. / Niwa,K. / Tanaka,T. et al. | Kraftfahrwesen | 1988


    Measurement of Bearing Friction Loss Under Dynamic Load

    Niwa, Kosaburo / Tanaka, Tadashi / Ogita, Yukio | SAE Technical Papers | 1988


    Bearing Race Load Distribution Optimization

    Frayer, Robert W. / Bailey, Ted E. | SAE Technical Papers | 1997