The main purpose of this paper was to investigate the effect of the multiple ultrasonic surface rolling process (USRP) on the surface mechanical properties and wear mechanism of Ti-6Al-4V. Firstly, X-ray diffraction (XRD) microscopic analysis, work hardening and residual stress were used to measure and characterize the surface performance by USRP. The friction coefficient and wear morphology were obtained by the scanning electron microscope (SEM), three-dimension (3D) white light interferometer and energy dispersive spectrometer (EDS). The results showed that the material surface mechanical properties was effectively improved by the USRP, and the surface grains were refined to form nanoscale. It also can be found that the wear resistance of the material surface was effected by the surface mechanical properties. With the increase of processing, the main wear mechanism changed from delamination-based oxidation wear to adhesive wear with the increase of processing.

本文的主要目的是研究多重超声表面轧制工艺（USRP）对Ti-6Al-4V的表面力学性能和磨损机理的影响。首先，使用X射线衍射（XRD）显微镜分析，加工硬化和残余应力通过USRP测量和表征表面性能。摩擦系数和磨损形态是通过扫描电子显微镜（SEM），三维（3D）白光干涉仪和能量色散光谱仪（EDS）获得的。结果表明，USRP有效改善了材料的表面力学性能，并且细化了表面晶粒以形成纳米级。还可以发现，材料表面的耐磨性受表面机械性能的影响。随着加工的增加，