High Temperature 3-body Abrasive Wear of HVOF and HVAF Sprayed Cr3C2-NiCr Coatings

Leo Janka, Manel Rodriguez Ripoll, Ville Matikainen, Petri Vuoristo

    Tutkimustuotos: KonferenssiartikkeliScientificvertaisarvioitu


    Wear protection is used in the industry to increase the lifetime of tribologically loaded components. One of the most widely applied wear protection is hard coating technology to protect the surface of a component from harsh wear conditions. Among them, thermal spraying is commonly adopted technique to deposit wear-resistant surface layers.

    For wear protection at high service temperatures, chromium carbide based coatings deposited with high velocity oxy-fuel (HVOF) and high velocity air-fuel HVAF techniques are most suitable.

    In this study, various Cr3C2-NiCr powders were sprayed with both HVOF and HVAF processes. The microstructure, porosity level and hardness values of the deposited coatings were measured. In addition, three-body abrasive wear resistance of these coatings was tested at 300°C, 500°C and 700°C. The wear tracks and cross sections of tested coatings were studied with scanning electron microscopy (SEM), in order to characterize the wear mechanisms at high

    The results show that at lower testing temperatures, powder selection and spraying process defines the wear rate of the coating. However, at maximum testing temperature, the differences in wear rates between tested coatings decreases. This is due to microstructural changes in coating at high temperatures.
    OtsikkoSurface Modification Technologies XXVIII
    AlaotsikkoProceedings of the Twenty Eighth International Conference on Surface Modification Technologies
    ToimittajatT.S. Sudarshan, Petri Vuoristo, Heli Koivuluoto
    TilaJulkaistu - tammik. 2015
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
    TapahtumaInternational Conference on Surface Modification Technologies - , Suomi
    Kesto: 1 tammik. 2000 → …


    ConferenceInternational Conference on Surface Modification Technologies
    Ajanjakso1/01/00 → …


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