基于有限元的激光定点钎焊温度场研究  

Simulation of the Temperature Field in Laser Fixed Spot Brazing Using FEM

作　　者：杨志波[1] 徐九华[1] 傅玉灿[1] 徐鸿钧[1] 

机构地区：[1]南京航空航天大学江苏省精密与微细制造技术重点实验室

出　　处：《机械科学与技术》2008年第5期688-691,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：江苏省自然科学基金项目(BK2006723)资助

摘　　要：利用ANSYS软件对激光定点钎焊过程温度场进行了有限元模拟,在分析过程中采用三维单元,并考虑了材料热物性的非线性特征,建立了有限元模型,得出了钎焊过程中,不同工艺参数下试样表面的温度场分布图,并进行了温度测量和实际钎焊实验。结果表明:有限元分析温度曲线与实测温度曲线比较吻合,钎焊后金刚石与基体实现高强度连接。The purpose of this paper is to simulate the temperature field of laser brazing by FEM. In the analysis the 3-D solid elements are used, and the nonlinear factors of temperature-dependent material properties are taken into consideration. The fields of temperature distribution under different brazing technological parameters during the laser brazing process are obtained. Finally, the simulation results are verified by the brazing-temperature measure- ment and the experimental data. All the results show that the simulation results agree well with the experimental results, and the hard joint between diamond and steel substrate is realized. This study is useful for selecting reasonable processing parameters in laser brazing diamond grits.

关 键 词：激光钎焊 温度场 有限元法 

分 类 号：TG74[金属学及工艺—刀具与模具]