ABSTRACT
In this study, the SiC/ZL114A composite was fabricated by laser deposition manufacturing, and the microstructure, microhardness and tensile property were deeply studied by the optical microscope, microhardness tester and electronic universal testing machine. The results show that the deposited microstructure consists of ZL114A matrix structure and SiC particles. For single pass deposited sample, the SiC content in the middle of deposited layer increases with the laser power, but decreases in the layer surface. After multi-passes and layers deposition, SiC particles are redistributed and more evenly distributed in the deposited layer with the laser power increasing. The microhardness of deposited layer is higher in the layer surface and fluctuates greatly in the middle of deposition layer. Along with the increasing of laser power and SiC content, and the decreasing of scanning speed, the average microhardness of deposited layer increases with a higher fluctuation degree and a wider fluctuation range. When the SiC content is 10%, the strength of SiC/ZL114A composite is highest, and with the increasing of SiC content, the strength and plasticity decreases continuously.
