剪切温度对车削加工GH4169镍基高温合金的影响  

Influence of Shear Temperature on Chip Formation of Turning GH4169

作　　者：郭晓东[1] 李军利[1] 邹斌[1] 陈明[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《上海交通大学学报》2009年第1期79-83,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50675134)

摘　　要：通过一系列GH4169镍基高温合金切削实验并制备其切屑金相,分析比较了理论计算及有限元仿真所得剪切温度值,探讨了剪切温度对其切屑形成的影响.结果表明:利用有限元仿真所得剪切温度值更接近实际值;当切削速度为250 m/min时,剪切温度值为880.8°C,此时材料的屈服强度降幅较大,材料内部组织发生变化而形成锯齿形切屑;当切削速度为30,65 m/min时,则没有形成锯齿形切屑.所研究的内容有利于优化GH4169的加工工艺.A series of cutting experiments were done and the metallographic pictures of chips were taken, the temperature values of theory calculation and simulation were contrasted to find out the influence of shear temperature on the chip formation. The study shows that the temperature values given by the finite element method tend to the real ones; when the cutting speed is 250 m/min the shear temperature is 880.8 ℃, and in this case the materials yield strength decreases a lot, the texture inside the chip changes with the appearance of the saw-tooth, but no saw-tooth when 30 m/min and 65 m/min. The study of this paper can be used to optimize the manufacture processing of GH4169.

关 键 词：镍基高温合金 切削 剪切温度 有限元方法 锯齿形切屑 

分 类 号：TG501[金属学及工艺—金属切削加工及机床]