Ti-6Al-4V titanium alloy has been widely used in aerospace, automotive, chemical, energy and medical fields due to its high specific strength, good fatigue and corrosion resistance and excellent heat and cold resistance.However,Ti-6Al-4V titanium alloy surface hardness is low, high friction coefficient, poor wear resistance, adhesion wear and fretting wear is very sensitive and other shortcomings have seriously restricted its application as a key wear-resistant component, such as Ti-6Al-4V titanium alloy as valve and guide rod, piston rod, piston pin and connecting rod shaft material, easy to wear and grinding parts. Therefore, improving the surface wear resistance of Ti-6Al-4V titanium alloy has very important engineering value.
Ni-based WC composite coating can organically combine the strength and toughness of metal, good process property and excellent wear resistance, corrosion resistance, high temperature resistance and oxidation resistance of ceramic materials, and can obtain various excellent surface properties. It is a research and development hotspot in the field of laser cladding technology.
