钛合金及其表面处理的现状与展望

Status and Prospect of Surface Treatment for Titanium Alloys

钛合金具有抗腐蚀能力强、比强度高、中温性能稳定等一系列优点 ,另一方面 ,它也有对粘着磨损和微动磨损非常敏感 ,耐磨性差 ,易氧化 ,对聚合物、金属及陶瓷涂层附着力差等缺点 ,这些缺点的存在限制了它的进一步应用 ,为克服钛合金这些缺点采取了一些相应的表面处理对策与手段 ,如表面微弧氧化、表面合金化、离子注入表面改性等。研究表明在钛合金表面形成TiC、TiN、TiO、(TiAl)N等纳米级 ,复合 ,渗、镀、注入层今后仍然是钛合金表面处理的发展方向。

Titanium alloys with superior corrosion resistance, high specific stre ngth, stable performance at moderate temperatures etc advantage. on the other ha nd. are restricted in application owing to its inherent shortcomings such as sen sitive to adhesive wear, fretting wear, poorly grind resistant, tend oxidation a nd poorly adhesive to polymer, metals and ceramic coatings. The strategies and w ays to be used overcome above shortcomings by surface treatment for titanium al loys. For example: surface microarc oxidation, surface alloying and ion implanta tion and so on. Form TiC?TiN?TiO and (TiAl)N etc nanomeasure ,complex, infiltr ate, plating and implantation layer on titanium alloys surface is developing di rection for the future surface treatment.