钛合金TC4低塑性滚压表面完整性的实验研究

发布时间：2018-01-17 03:28

本文关键词：钛合金TC4低塑性滚压表面完整性的实验研究　出处：《华南理工大学学报(自然科学版)》2017年01期 　论文类型：期刊论文

【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.
[Abstract]:Taking titanium alloy TC4 as the research object, the standard data set of surface integrity evaluation (including surface morphology, surface roughness, surface microhardness and surface residual stress) was selected as the evaluation index. Single factor test design method, optical profilometer, microhardness tester and blind hole residual stress measuring instrument were used to obtain the surface morphology, microhardness distribution and residual stress state of low plastic rolling machining. The process parameters (rolling speed and feed speed) are compared and analyzed. The influence of hydraulic oil prepressure and rolling pass on the surface integrity of low plastic rolling machining is studied. The results show that the hydraulic oil prepressure affects the surface morphology of rolling machining. The influence of surface roughness, microhardness and residual stress on the machined surface is the greatest, and the increase of rolling speed will increase the roughness value of the machined surface. Increasing the rolling pass will increase the hardening degree and residual compressive stress amplitude of the working surface. In the range of design experiment, the surface integrity of titanium alloy can be obtained by using high hydraulic oil prepressure and multi-pass processing in low plastic rolling processing of titanium alloy TC4.
【作者单位】：山东大学机械工程学院∥高效洁净机械制造教育部重点实验室;中国航发沈阳黎明航空发动机有限责任公司;
【基金】：国家自然科学基金资助项目(51425503,51375272) 国家科技重大专项(2015ZX04005008,2014ZX04012014) 山东省泰山学者建设工程专项资金资助项目(TS20130922)~~
【分类号】：TG146.23;TG306
【正文快照】： Foundation items:Supported by the National Natural Science Foundation of China(51425503,51375272)and the National Scienceand Technology Major Project of China(2015ZX04005008,2014ZX04012014)钛合金TC4(Ti-6Al-4V)具有高比强、耐高温和耐腐蚀等优异性能,已广泛用

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