TC17钛合金叶片制造过程的表面完整性研究  

Surface Integrity Research of TC17 Titanium Alloy Blade in Manufacturing Process

作　　者：王欣 杨清 宋颖刚 赵振业 汤智慧 

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]中国航发沈阳黎明发动机有限责任公司,辽宁沈阳110043

出　　处：《钛工业进展》2017年第6期42-46,共5页Titanium Industry Progress

基　　金：中航工业集团技术创新基金资助项目(2013E62137R);航空基金资助项目(2015ZF21017)

摘　　要：采用多种最终加工工序组合,在TC17钛合金叶片表面引入不同表面完整性状态,研究最终加工工序对叶片表面形貌、平均粗糙度、残余应力的影响。结果表明:仅振动光饰处理后,表面平均粗糙度在0.2μm以下,表面残留有磨料运动痕迹,残余应力影响层深度约为30~40μm,表面残余应力仅-200 MPa左右;不进行振动光饰处理时,陶瓷丸喷丸比玻璃丸喷丸后叶片表面粗糙度更佳,喷丸后叶片表面Kurtosis值接近3,本研究中残余应力影响层深度约为100μm,表面残余应力在-750^-850 MPa之间;喷丸后进行振动光饰可消除叶片表面的喷丸弹坑,平均粗糙度减小到0.2μm以下,残余应力影响层深度与未经振动光饰处理的相当,表面残余应力变化小。当加工痕迹被喷丸消除时,叶片表面Kurtosis值接近3,这说明弹坑底部圆滑,因此认为Kurtosis值可作为表征喷丸表面的特征粗糙度参数。The surface integrity statues were induced to TC17 titanium alloy blades using multiple manufacturing processes,and the effects of manufacturing process were investigated on surface profile,average roughness and residual stress profile.The results show that vibrating finishing leads to average roughness 0.2 μm and surface trace produced by the abrasive materials movement on the titanium blade,and its residual stress layer depth and surface residual stress value are about 30 - 40 μm and-200 MPa respectively.On the other hand,ceramic shot peening produces better average roughness than glass shot peening when unusing vibrating finishing,and after peening,Kurtosis value is close to 3.In our research,the effect layer and the surface residual stress numerical range of ceramic and glass shot peening are about 100 μm and-750 --850 MPa respectively.Moreover,vibrating finishing after shot peening also leads to average roughness 0.2 μm and the elimination of shot crater,and the residual stress changes little.The Kurtosis value reach about 3 when the machining masks are removed by shot peening process,indicating that the shot crater has a smooth bottom,so it is believed that the Kurtosis value could be the characteristic parameter of shot peening surface.

关 键 词：TC17钛合金 振动光饰 喷丸 表面完整性 制造过程 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]