STP1419: Development of a New Material for Guide Roll Bearings for Continuous Casting Machine

    Yamamura, K
    Reserch Engineer and General Manager, NSK Ltd. Basic Technology Research & Development Center, Kanagawa,

    Oohori, M
    Reserch Engineer and General Manager, NSK Ltd. Basic Technology Research & Development Center, Kanagawa,

    Pages: 11    Published: Jan 2002


    Abstract

    The guide roll bearings for a continuous casting machine (CCM) are used under extremely low rotation speed, high load, and debris-contaminated and water-infiltrated lubrication. Therefore, raceway surfaces usually wear severely and outer rings are sometimes fractured.

    The purpose of this study is to prolong the CCM bearing life by material and heat-treatment technologies. We investigated the fracture process of CCM bearings and developed a new material, case hardened steel, that shows superior wear resistance to SAE 52100 steel. Optimum control of retained austenite and hardness extends rolling contact fatigue life under contaminated lubrication. In the simulation tests of a CCM guide roll, superior wear resistance was confirmed under water-infiltrated lubrication conditions.

    Keywords:

    wear, spherical roller bearing, rolling contact fatigue life, retained austenite, carbide, carbonitride, hardness


    Paper ID: STP10862S

    Committee/Subcommittee: A01.28

    DOI: 10.1520/STP10862S


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