Research on the Preparation Process and Performance of a Wear-Resistant and Corrosion-Resistant Coating

In order to study the wear resistance and corrosion of a composite material with Fe316L substrate Co-Cr-WC coating, Co-Cr alloy coatings different mass fractions WC (hard tungsten carbide) were prepared on by laser cladding technology. The phase composition, microstructure element distribution analyzed X-ray diffraction (XRD), scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS). hardness samples was tested Vickers microhardness tester, friction coefficient amount an electrochemical workstation. results showed that macroscopic appearance coating surface good without obvious cracks, microstructures mostly equiaxed crystals, cellular crystals dendrites. With addition WC, structures near particles became more refined extended from particles. When content 40%, defects such as fine cracks appeared in coating. average 30%WC-Co-Cr 732.6 HV, which 2.29 times matrix; 0.16, 14.64 × 10−6 mm3 N−1 m−1, 42.1% 44.47% matrix, respectively; self-corrosion voltage layer 120 mV, current 7.263 10−4 A/cm2, 30.3% 7.62% substrate, respectively. experimental could significantly improve matrix under optimal process parameters.