Research on Microstructure and Properties of Coating Produced by High Velocity Electric Wire Arc Spraying of TiB_2/AI_2O_3 Cored Wire

摘要

In the paper, a newly composite TiB_2/AI_2O_3 coating prepared by High Velocity Electric Wire Arc Spraying" and cored wire with ceramic powders composed of refractory Al_2O_3 and TiB_2 filling inside was introduced. The microstructure and composition of the TiB_2/AI_2O_3 coating were investigated by metallgraphic microscope, scanning electron microscope and X-rayed diffraction, Bonding strength and hardness and mechanics properties were tested. The experimental results show the TiB_2/AI_2O_3 composite coating possessed high hardness and higher bonding strength with substrate and excellent comprehensive mechanical properties. It can be used for improving shoot-proof properties in the surface of arms.