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用ＳＲＶ摩擦磨损试验机研究了面扫描激光淬火钛合金在线接触条件下的微动磨损性能，并用ＳＥＭ、ＥＤＡＸ及Ｘ射线衍射等分析了其机理．结果表明：激光淬火处理后钛合金的耐磨性提高１２３倍，摩擦系数降至原来的１／３～１／５，微观硬度提高２．８倍；抗蚀能力得到改善．同时，激光淬火处理后钛合金表面晶粒细化为球状微晶结构，由表面向内层形成多层梯度结构，分别为３μｍ陶瓷化层，５～６μｍ无序结构层，由α＋β相组成的１．５～２．０ｍｍ淬火区．淬火区内β相的含量由表向里逐渐降低
The fretting wear behavior of the surface-scan laser-hardened titanium alloy under in-line contact conditions was investigated by using a SRV friction and wear tester. The mechanism was also analyzed by SEM, EDAX and X-ray diffraction. The results show that after laser quenching, the wear resistance of titanium alloy is improved by 123 times, the friction coefficient is reduced to 1/3 ~ 1/5 and the micro hardness is increased by 2.8 times. The corrosion resistance is improved. At the same time, the surface of the titanium alloy is refined into a spherical microcrystalline structure after laser quenching, and a multilayer gradient structure is formed from the surface to the inner layer, which are respectively a 3 μm ceramicized layer and a 5-6 μm disordered structure layer composed of α + β phases 1.5 ~ 2.0mm quenching zone. Quenching zone β-phase content gradually decreased from the table