Microstructure and Wear Properties of In Situ Synthesized VC Carbide Reinforced Fe-based Surface Composite Coating Produced by Laser Cladding

摘要

In situ synthesized VC carbide particles reinforced Fe-based composite coating was fabricated by laser cladding on steel substrate using ferrovanadium (Fe-V) alloy and graphite as the precursor powders. The phase structure and microstructure of the clad layer were investigated by means of X-ray diffraction analysis, scanning electron microscopy, and electron probe microanalysis. Results showed that uniformly distributed VC particles with the radial dendrites shape could be synthesized by the in situ reaction. The hardness and wear properties of the clad coatings were greatly improved due to the presence of VC particles in comparison with the substrate.