Titanium alloy wear-resistant and ablation-resistant composite strengthening layer and preparation method thereof

The invention relates to the technical field of titanium alloy surface treatment, in particular to a titanium alloy wear-resistant anti-ablation composite strengthened layer and a preparation method thereof. Carrying out surface plastic deformation pretreatment on the cleaned titanium alloy by adopting a mechanical shot blasting method to form a diffusion channel; plasma nitriding is conducted on the titanium alloy with the surface subjected to plastic deformation, and the titanium alloy with the surface layer subjected to composite strengthening is obtained; based on poor wear resistance and ablation resistance of traditional titanium alloy, a wear-resistant nanocrystalline structure compound layer, an ablation-resistant aluminum-rich layer and an anti-fatigue diffusion layer are prepared on the surface of the titanium alloy through a spray-infiltration composite technology combining mechanical shot blasting and plasma nitriding, and the composite strengthening layer has good wear resistance and ablation res