Microstructure and Wear Resistance of Ni–WC–TiC Alloy Coating Fabricated by Laser

In this study, a Ni–WC–TiC alloy coating was fabricated by laser to improve the wear resistance and service life of Cr12MoV die steel. The microstructures phases were analyzed scanning electron microscope (SEM), an energy dispersive spectrometer (EDS), X-ray diffraction (XRD). properties tested hardness friction tester. results show that has good metallurgical bond with substrate. from top bottom are mainly equiaxed crystal, columnar dendrite, cellular dendrite. Combined physical phase analysis elemental distribution coating, there some phases, such as γ~(Fe, Ni), Cr23C6, WC, TiC, Fe3W3C, Cr2Ti. Compared steel substrate, resistance. background region grains is Ni). From EDS results, it can be seen rod-like particles, which uniformly distributed on coating. Some W Ti carbides form in grains. addition TiC particles improves WC refinement. highest 770.7 HV0.5, approximately 3.3 times higher than volume 0.26 mm3, or 8.6% contributed reinforced finer microstructure volumes substrate 1.8 4.5 mm3 at 20 60 min, respectively. While 0.2 0.7 increased amplitude coating’s smaller helpful for improving