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  • 1.
    Berglund, Tomas
    et al.
    Sandvik Powder Solutions.
    Hall, Josefine
    Dalarna University, School of Technology and Business Studies, Materials Technology.
    Wear of PM HIP Metal Matrix Composites - Influence of Carbide Type2019In: HOT ISOSTATIC PRESSING, HIP' 17 / [ed] Dayal, P Triani, G, MATERIALS RESEARCH FORUM LLC , 2019, p. 142-148Conference paper (Refereed)
    Abstract [en]

    The type of hard phase in combination with matrix material has a great influence on the wear properties of PM HIP Metal Matrix Composites. The hardness and toughness of the hard phase as well as its reaction with the matrix in combination with wear mechanism can cause significant differences in performance of the material. Three materials with the same matrix alloy but different carbide types have been studied with regards to tribological behavior in low stress and high stress abrasion as well as scratch testing against a quartz stylus. In low stress abrasion testing the materials has only very small differences in the performance between the materials. The materials containing crushed or spherical fused tungsten carbide had a higher initial wear rate compared to the material with macrocrystalline carbide. This can be explained by the higher degree of carbide dissolution in these materials. In the later stages of wear the three materials have similar performance. In the scratch testing a clear difference can be observed between the materials. The material containing the fused tungsten carbide exhibits a higher degree of carbide damage at the exit side of the wear scar sliding over the carbide. This can be attributed to the much higher degree of carbide dissolution in the fused carbide compared to the MC carbide. The results from tribology testing are discussed and compared to wear mechanisms observed in parts that have been in service in a slurry pump and a crusher.

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