Influence of processing parameters on microstructure and wear resistance of Ti+TiC laser clad layer on titanium alloy
(1.黑龙江省哈尔滨市黑龙江科技学院材料科学与工程学院
2.College of Materials Science and Engineering, Heilongjiang Institute of Science and Technology, Harbin 150027, China)
2.College of Materials Science and Engineering, Heilongjiang Institute of Science and Technology, Harbin 150027, China)
Abstract: Laser cladding experiments were carried out on Ti-6Al-4V alloy with Ti+33%TiC(volume fraction) powders. Laser processing parameters were studied systematically to investigate the influences on the surface quality. Microstructure, microhardness and wear resistance of the clad layer were evaluated. The results show that the laser parameter has considerable influence on microstructure and wear resistance of laser clad layer. With the optimized technical parameters, a clad layer with good surface quality and uniform microstructure was obtained. The microhardness of the clad layer HV0.2 is 1 080, and the wear rate is reduced by 57 times.
Key words: titanium alloys; TiC; laser cladding; processing parameters; wear resistance