中文摘要：

以钛合金TC4为研究对象,选择表面完整性评价标准数据组（包括表面形貌、表面粗糙度、表面层显微硬度和表面残余应力）作为评价指标,采用单因素试验设计法,利用光学轮廓仪、显微硬度计和盲孔法残余应力测量仪获得低塑性滚压加工表面形貌、微观硬度分布和残余应力状态,对比分析了工艺参数（滚压速度、进给速度、液压油预压力和滚压道次）对低塑性滚压加工表面完整性的影响程度.结果表明：液压油预压力对滚压加工表面形貌、表面粗糙度及加工表面显微硬度和残余应力的影响程度最大,滚压速度的升高会增大加工表面粗糙度值,增加滚压道次会使加工表层硬化程度和残余压应力幅值变大;在设计实验范围内,钛合金TC4低塑性滚压加工采用高的液压油预压力和多道次加工可获得更优的加工表面完整性.

英文摘要：

Through single factor test method, the surface topography, micro-hardness distribution and residual stress of titanium TC4 after a low-plasticity burnishing are obtained by using an optical profiler, a micro-hardness tester and a residual stress test instrument, and the surface integrity of the burnished titanium TC4 is evaluated by using the standard data of the topography, roughness, micro-hardness and residual stress of surface. Then, the effects of low-plasticity burnishing parameters （including burnishing speed, feed speed, hydraulic oil pressure and burnishing passes） on the surface integrity are analyzed comparatively. The results show that （1） the hydraulic oil pressure has the most significant effect on the topography, roughness, micro-hardness and residual stress of the bur-nished surface; （2） the surface roughness increases with the burnishing speed, and both the micro-hardness and the residual stress increase with the burnishing passes; and （ 3 ） higher hydraulic oil pressure and more burnishing passes help achieve a higher surface integrity in the low-plasticity burnishing of titanium TC4.