The invention discloses a
titanium alloy surface
laser cladding wear-resistant and self-lubricating
coating suitable for a high-load environment and a preparation method thereof. The method comprises the following steps: 1,
grinding,
polishing, cleaning and preheating the surface of a
titanium alloy substrate; secondly,
titanium powder,
titanium carbide powder and silver
powder are subjected to ball-milling mixing and then dried, and composite powder is obtained; thirdly, the composite powder is conveyed to a
titanium alloy base material cladding area,
laser cladding is conducted, and a cladding piece is obtained; and fourthly, the cladding part is subjected to
slow cooling treatment, and the wear-resistant and self-lubricating
coating is obtained. By controlling the content of each component and adopting the high-energy ball milling and
laser cladding processes, a fine Ag lubricating phase is uniformly introduced into a high-
hardness Ti-TiC
coating system, dispersed distribution of Ag elements is realized, microscopic segregation is remarkably inhibited, and the
composite coating which is uniform and compact in structure, high in
hardness and low in
friction coefficient is prepared on the surface of the
titanium alloy. And the service reliability and the service life of the
titanium alloy key component under the high-load working condition are remarkably improved.