Effects of TiC Addition Amount on Microstructure and Properties of TA15 Laser Cladding Composite Coating

In order to solve the problems of poor wear resistance and easy adhesion of TA15 titanium alloy, laser cladding technology was used to prepare TA15-TiC titanium alloy-ceramic laser cladding composite coating on TA15 substrate. The results show that, the phase of the cladding layer is mainly composed of α'-Ti, β-Ti and TiC. As the cladding amount of TiC ceramic particles increases, the morphology of the precipitated TiC changes from feather-like and chain-like to dendritic and petal-like. When the TiC cladding amount reaches 20%, a spherical TiC structure is precipitated. Effective TiC phase precipitation and the existence of stable spherical TiC can effectively improve the performance of the cladding layer. When 20 wt% TiC is added, the cladding layer has the best wear resistance, with a hardness up to 600.4 HV0.5, which is 1.5 times that of the base material; the wear rate is 0.89×10^-8 mm³/(N·m), and the wear resistance is 9.3 times that of the base material.