Preparation method of laser-assisted titanium alloy ion nitriding wear-resistant coating

Through laser-assisted ion nitriding technology, the "hard shell" structure on the surface of titanium alloy workpieces is eliminated, and nitrogen ion diffusion is promoted, which solves the problem of insufficient thickness of titanium alloy coatings in the prior art, and achieves a thicker and higher quality wear-resistant coating, improving the performance of the material under high load conditions.

CN119710536APending Publication Date: 2025-03-28XIAN SURFACE MATERIAL PROTECTION CO LTD
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Patent Information

Application Number
CN202411918203.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The wear-resistant coating prepared by the existing titanium alloy ion nitriding technology is small in thickness and cannot meet the material performance requirements of aerospace and other fields for high load friction conditions.

Method used

Laser-assisted ion nitriding method is used to form a wear-resistant coating on the surface of the titanium alloy workpiece, and the "hard shell" structure on the surface of the seepage layer is eliminated by laser remelting, thereby promoting nitrogen ion diversion and improving the coating thickness and quality.

Benefits of technology

The thickness and quality of the wear-resistant coating are significantly improved, the service time and reliability of titanium alloy workpieces under load friction conditions are improved, and the problem of insufficient coating thickness in the prior art is solved.

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Abstract

The invention discloses a preparation method of a laser-assisted titanium alloy ion nitriding wear-resistant coating. The method comprises the following steps: 1, treating a titanium alloy workpiece; secondly, the treated titanium alloy workpiece is subjected to ion nitriding, and a nitriding layer with a hard shell layer structure is formed; 3, performing laser remelting on the infiltrated layer to destroy a hard shell layer structure; and fourthly, the titanium alloy workpiece subjected to laser remelting is subjected to ion nitriding diffusion permeation, and the wear-resistant coating is formed. The wear-resistant coating is prepared on the surface of the titanium alloy workpiece through the laser-assisted ion nitriding method, the hard shell layer structure on the surface of the nitriding layer is eliminated through laser remelting, the thickness and quality of the wear-resistant coating are improved, phase change and workpiece deformation are avoided, and the preparation process is simple, high in reliability and suitable for application and popularization.
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