PCD刀具高速干式切削铜合金的磨损研究  

Research on tool wear of PCD in high speed dry cutting bronze alloy

作　　者：杨海军[1] 董海[1] 王磊[1] 朱袁琦 YANG Haijun;DONG Hai;WANG Lei;ZHU Yuanqi(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024

出　　处：《金刚石与磨料磨具工程》2018年第3期53-57,共5页Diamond & Abrasives Engineering

摘　　要：使用PCD刀具对锡青铜合金材料进行高速干式切削试验,分别采用扫描电镜(SEM)、X射线能谱仪(EDS)对刀具的磨损形貌进行观察和磨损区域化学成分进行分析,并以此研究了PCD刀具的磨损机理。结果表明:在高速干式切削条件下,PCD刀具主要表现为前刀面的片状剥落和后刀面的轻微破损;同时还伴随着机械应力和热应力冲击下的脆性破损,出现崩刃、切削刃整体断裂以及前后刀面的大面积剥落。刀具磨损的主要原因是高温作用下的氧化磨损和扩散磨损。The dry cutting experiment of tin bronze alloy at high speed with PCD tools is carried out.The tool wear morphology was observed by the Scanning Electron Microscopy（SEM）and the chemical composition of wear area was detected with the aid of X-ray Energy Dispersive Spectrometer（EDS）,and the mechanisms of tool wear were studied.The results show that the wear morphology of PCD tools is characterized by the flaking on the rake face and the slight breakage on the flank surface.At the same time,it is also accompanied by brittle failure under the impact of mechanical stress and thermal stress,resulting the breakage of the cutting edge,overall fracture of cutting edge and large-scale flaking of the rake and flank face.The oxidation wear and diffusion wear under high temperatures are the main reasons of tool wear.

关 键 词：PCD刀具 干式切削 青铜合金 磨损形态 磨损机理 

分 类 号：TG58[金属学及工艺—金属切削加工及机床] TG71