Abstract
A NiCrBSi alloy coating was sprayed on H13 hot work mould using a high velocity oxygen fuel. The surface and cross-section morphologies of obtained NiCrBSi coating were observed using a field emission scanning electron microscope (SEM), its phases were analyzed using an X-ray diffractometer (XRD). The friction-wear behaviors of NiCrBSi coating were investigated using a high temperature wear tester, the morphologies and chemical elements of worn tracks were analyzed using a SEM and its configured energy dispersive spectrometer (EDS), respectively. The results show that the average COF of NiCrBSi coating at 500, 600, and 700 °C is 0.4046, 0.4039, and 0.3975, respectively. The wear mechanism of NiCrBSi coating at 500 and 600 °C is abrasive wear, adhesive wear and oxidation wear, while that at 700 °C is abrasive wear and oxidation wear, the wear resistance of NiCrBSi coating is dependent on the compounds of Ni, Si and Cr.
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