单晶镍基高温合金微铣削温度场仿真与试验研究  

Simulation and Experimental Study on Temperature Field in Micro-milling of Single Crystal Nickel-based Superalloy

作　　者：高奇[1] 李文博 郭光岩 GAO Qi;LI Wenbo;GUO Guangyan(School of Mechanical Engineering and Automation,Liaoning University of Technology,Jinzhou Liaoning 121001,China)

机构地区：[1]辽宁工业大学机械工程与自动化学院,辽宁锦州121001

出　　处：《机床与液压》2022年第2期65-69,共5页Machine Tool & Hydraulics

基　　金：辽宁省博士启动基金项目(2019-BS-123)。

摘　　要：单晶镍基高温合金材料微构件在高温环境中应用广泛,但它在微铣削过程中的温度分布测试较为困难。采用有限元法对单晶材料微铣削过程的温度分布及传递进行仿真,定义温度分布区。根据热电偶工作原理,标定温度-电势曲线,搭建微铣削温度测试平台,完成单晶镍基高温合金DD98微铣削温度测试。结果表明:单晶材料微铣削温度区分为第Ⅰ剪切热源温度分布区,第Ⅱ、Ⅲ摩擦热源温度分布区;仿真温度区最高温度为284℃、最低温度为148℃;微铣削温度随着主轴转速、进给速度和铣削深度的增加而升高;试验测量温度最高不超过200℃,与有限元仿真对应位置的温度极为接近,解释了微铣削温度分布机制,为控制零件切削表面质量和刀具磨损提供参考。The micro-structures with single crystal nickel base superalloy materials are widely used in high temperature environment, but it is difficult to measure the temperature distribution in the process of micro-milling. The temperature distribution and transfer during micromilling of single crystal materials were simulated by using finite element method, and the temperature distribution region was defined. According to the working principle of thermocouple, the temperature-potential curve was calibrated, and the micro-milling temperature test platform was set up to test the micro-milling temperature of single crystal nickel-based superalloy DD98. The results show that the micro-milling temperature region of single crystal materials can be divided into three temperature distribution regions including the first shear heat source temperature distribution region, and the second and the third friction heat source temperature distribution region, the simulated maximum temperature is 284 ℃ and the lowest temperature is 148 ℃;the micro-milling temperature increases with the increase of spindle speed, feed speed and milling depth;the measured maximum temperature does not exceed 200 ℃, which is very close to the temperature of the corresponding position in finite element simulation;the micro-milling temperature distribution mechanism is explained, which provides reference for controlling the cutting surface quality and tool wear of parts.

关 键 词：单晶镍基高温合金 微铣削 温度分布 有限元仿真 

分 类 号：TG71[金属学及工艺—刀具与模具]