STP771

    Materials Evaluation by Flat Washer Testing

    Published: Jan 1982


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    Abstract

    A flat washer test for assessing the rolling contact fatigue performance of bearing materials is described in detail. Measurements of the life of commercial bearing quality SAE 52100 steel has established the baseline against which the relative performance of different steels or developments in heat treatment and bearing manufacturing can be judged. The life of carburized SAE 8720 steel has been shown to be inferior to that of SAE 52100 because of the lower level of cleanness of carburizing steels. Electroslag remelting of SAE 52100 produces an improvement in life. Heat treatment to produce lower bainite in SAE 52100 is advantageous, particularly under conditions of water-contaminated lubrication or where the use of fire-resistant fluids is required. Sinter forging is a viable production route for SAE 52100 bearings when the powder oxygen content is controlled.

    Keywords:

    bearings, fatigue, martensite, bainite, hydrogen embrittlement, fire-resistant fluids, SAE 52100 steel, SAE 8720 steel, electroslag remelting, sinter forging, bearing steels


    Author Information:

    Hampshire, JM
    Materials research manager, project metallurgist, and former group chief metallurgist, Bearing Research Centre, RHP Bearings Limited, Newark, Notts

    Nash, JV
    Materials research manager, project metallurgist, and former group chief metallurgist, Bearing Research Centre, RHP Bearings Limited, Newark, Notts

    Hollox, GE
    Materials research manager, project metallurgist, and former group chief metallurgist, Bearing Research Centre, RHP Bearings Limited, Newark, Notts


    Paper ID: STP36132S

    Committee/Subcommittee: A01.28

    DOI: 10.1520/STP36132S


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