Author(s)

Fei Zhao, Yanhai Zhu

Corresponding Author

Fei Zhao

ABSTRACT

To improve the wear resistance of titanium alloy surfaces and adapt to a richer service environment. In this paper, a surface antioxidant protective coating is used to clad TC4 titanium alloy, followed by oxygen diffusion treatment at different temperatures and times. The metallographic organization, hardness and friction curves of the specimens after the oxygen diffusion treatment were also characterized. The results show that the clad protective coating can effectively mitigate the high temperature oxidation behavior of TC4 and inhibit the formation of sparse and brittle oxides on the surface. The microhardness of TC4 alloy surface layer was increased from 320 HV0.3 to 737 HV0.3 after oxygen diffusion treatment at 950°C×10 h. The hardening depth reached more than 100 μm, and the wear resistance was improved by 48%.

KEYWORDS

TC4 Titanium Alloy, Surface strengthening, Oxygen diffusion, Wear resistance