超硬磨料砂轮干式磨削Ti6Al4V合金的表面完整性研究  

Investigation of surface integrity on dry grinding Ti6Al4V alloy with super-abrasive wheels

作　　者：霍文国[1] 徐九华[2] 傅玉灿[2] 戚厚军[1] 邵娟[1] 

机构地区：[1]天津市高速切削与精密加工重点实验室(天津职业技术师范大学),天津300222 [2]南京航空航天大学机电学院,江苏南京210016

出　　处：《山东大学学报（工学版）》2012年第3期100-104,共5页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(51075298);天津职业技术师范大学博士启动基金资助项目(KYQD11004);天津职业技术师范大学校级项目(KJY11-03)

摘　　要：针对钛合金干式磨削特点,制备了金刚石和立方氮化硼(cubic boron nitride,CBN)超硬磨料砂轮,进行了与碳化硅陶瓷砂轮干式磨削Ti6Al4V合金的对比试验研究。用扫描电子显微镜、三维体视显微镜、粗糙度仪和显微硬度计对磨削工况和试样表面进行了测定。分析了磨削用量对表面粗糙度的影响,比较了3种砂轮磨削工件的表面粗糙度、表面形貌、微观组织及显微硬度。研究表明:工件表面粗糙度随着磨削深度增大而增大,随着砂轮速度的增大而减小。与绿色碳化硅陶瓷结合剂砂轮相比,CBN和金刚石超硬磨料砂轮磨削工件的表面粗糙度和变质层深度较小,表面无明显烧伤,在一定用量条件下更适合Ti6Al4V合金干式磨削加工。Diamond and cubic boron nitride（CBN） grinding wheels were prepared according to dry grinding the titanium alloy.Comparative experiments of grinding were conducted between the vitrified bond SiC and brazed bond super-abrasive grinding wheels on dry grinding Ti6Al4V.Surface status and morphology of the work-piece were measured by means of scanning electron microscopy,three-dimensional digital microscope,profilograph and microhardness tester.The influences of three types of grinding wheels parameters on surface roughness,microstructures and properties of grinding the hardened layer of Ti6Al4V were studied.The results showed an increase of grinding surface roughness with the increase of grinding depth and depress of belt speed under the dry grinding conditions.The surface roughness and deform layer of ground work-piece with super-abrasive wheels were smaller than SiC wheels,which showed that the surperabrasive wheels were suitable for the dry grinding processes of the Ti6Al4V alloy.

关 键 词：超硬磨料砂轮 干式磨削 TI6AL4V合金 表面完整性 

分 类 号：TG58[金属学及工艺—金属切削加工及机床]