Optimization of Corrosion Wear Resistance of the NiCrBSi Laser-Clad Coatings Fabricated on Ti6Al4V

Ni-based alloy powder (NiCrBSi) was applied to prepare coatings on Ti6Al4V by laser cladding improve the wear resistance of latter under corrosion. The scanning speed found be an essential parameter that could adjust microstructure coatings. Changes in microstructures with were highlighted, and relationships between microhardness, fracture toughness, corrosion, corrosion established. Results indicated matrix changes from Ti2Ni + TiNi primary ?(Ni) eutectics (?(Ni) Ni3Ti) increasing speed. Moreover, reinforcement phases changed TiB2 TiC (5 mm?s?1) Cr7C3 (11 CrB (17 mm?s?1). average microhardness first increased then decreased, corresponding toughness showed opposite trend. optimum combination these properties observed coating prepared at 11 mm?s?1. This demonstrated excellent 3.5 wt.% NaCl solution, as well a high potential, low current density, density when electrode initially entered comparatively stable state. compared other speeds, this revealed higher critical potential for oxidation film destruction. results research collectively show regulating laser-clad applying different speeds is feasible strategy optimize