Research Progress on Properties of Laser Cladding Hard Phase Enhanced Ni-based Alloy Coating

Ni base alloy coating prepared by laser cladding technology can improve the surface hardness and wear resistance of the workpiece. In order to further improve the performance of the Ni-based alloy cladding layer and repair components which require high hardness and high wear resistance, the introduction of a hard phase to form a hard phase-reinforced Ni-based composite cladding layer is one of the research hotspots of researchers in China and abroad. Based on the review of relevant studies, the latest progress on the influence mechanism of the key variables such as the type, size and content of the hard phase, the dissolution behavior of the hard phase and the added elements on the performance of the hard phase reinforced Ni-based composite cladding layer was summarized. At the same time, it was pointed out that the control of defects such as cracks and pores was the main problem in the current research. Finally, the future work was prospected from the aspects of special powder composition design, hard phase gradient distribution and external auxiliary means, hard phase gradient distribution and external auxiliary means.