Preparation and Research Status of Mo₂NiB₂-Based Cermet and Coating forMaintenance and Remanufacture of Ships

In the severe marine environment of high salts, high humidity, wear and impact of cyclic loads, the key parts of ships are prone to corrosion, wear and fatigue failure. Therefore, the surface of the parts needs to be repaired and remanufactured, such as welding or laser cladding corrosion-resistant and wear-resistant layers on the surface. Mo₂NiB₂-based cermets have become coating materials for maintenance and remanufacturing due to their high hardness, excellent wear resistance and corrosion resistance, and high temperature oxidation resistance. The application of numerical simulation in research of Mo₂NiB₂-based cermets is summarized. The preparation processes of Mo₂NiB₂-based cermets or coatings, as well as the effects of different process parameters on the microstructure and performance of the materials are described in details. It is pointed out that the laser cladding in-situ synthesis technique combined with numerical simulation is the main research direction of Mo₂NiB₂-based cermets in the future.