钛及钛合金的表面处理技术新进展

钛及钛合金具有高比强度、优良的耐蚀性、良好的高温性能，在现代航空航天、军事工业、民用工业中占据越来越重要的位置。但是，钛及钛合金自身硬度低、耐磨性能差的缺点限制了它的进一步应用。介绍了几种能改善表面性能的表面处理技术在钛及钛合金上的应用以及这些处理技术的特点和最新进展。包括：激光熔覆表面处理、CVD、PVD、热扩散法和表面纳米化，以及多组元和多层涂层技术。

RECENT PROGRESS ON SURFACE TREATMENT TECHNOLOGIES OF TITANIUM AND TITANIUM ALLOYS

Titanium and titanium alloys possessed many advantages, including high strength and low density, good corrosion-resistance and good high temperature properties. Titanium and titanium alloys were widely used in the space flight and aeronautic industries, the martial industry and domestic industry. But the low hardness and wear-resistance confined the further application of these materials. It was possible to improve the surface properties of these materials by proper surface treatment. The application and newly progress of several surface treatment technologies were summarized, including laser remelting, CVD, PVD, thermo-diffusion and nanostructured surface. The multi-composition and multi-layer were also mentioned.