Titanium alloy surface repairing and strengthening functional coating integrated coating material and preparation method and application thereof

Abstract

The invention belongs to the technical field of surface modification, and discloses a titanium alloy surface repairing and strengthening functional coating integrated coating material and a preparation method and application thereof. The coating material sequentially comprises a high-hardness and self-lubricating functional surface layer, a wear-resistant, high-temperature-resistant and oxidation-resistant strengthening layer, a transition layer (moderate in hardness) and a size repair layer with strong film-substrate combination, the size repair layer is located on the surface of a substrate and is composed of Ti, the transition layer is composed of TiAl, the strengthening layer is composed of TiAlN, and the thickness of the size repair layer is larger than that of the substrate. And the functional surface layer is made of DLC (Diamond Like Carbon). The coating material has the advantages of being high in hardness, good in abrasion resistance, high temperature resistance and oxidation resistance and capable of achieving repairing and strengthening integration and multiple functions. A vacuum arc deposition and magnetron sputtering composite physical vapor deposition method is adopted for preparation, the coating material can be used for surface protection of a titanium alloy transmission part, and the coating material plays an important role in improving the reliability and stability of manufacturing equipment in China.

Description

technical field [0001] The invention relates to a method for modifying the surface of a titanium alloy, which belongs to the technical field of surface modification, and in particular to a coating material integrating titanium alloy surface repair and strengthening functional coating, as well as its preparation method and application. Background technique [0002] Titanium alloy has excellent properties such as low density, high specific strength and corrosion resistance, so it is more and more widely used in modern defense and military fields such as aviation, aerospace, and ships. However, its wear resistance is very poor, and the surface is prone to scratches, seizures and adhesive wear. For transmission shaft titanium alloy parts, surface wear often occurs, resulting in the problem of excessive size, which greatly affects the use of titanium alloy as a wear-resistant material. The use and life of the grinding transmission parts. Therefore, surface treatment of titanium ...

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Problems solved by technology

[0006] Another object of the present invention is to provide a method for preparing a coating material integrated with the above-mentioned titanium alloy surface repair and strengthening functional coating; the method is prepared by vacuum arc deposition and magnetron sputtering composite physical vapor deposition method and the The coating material is applied to the titanium alloy drive shaft parts of aviation and aerospace, which solves the shortcomings of the traditional parts such as low hardness, poor wear resistance and high temperature resistance, and poor bonding force, and realizes the function of repairing and strengthening the surface size of the part Coating integration requirements

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