激光对TIG电弧温度分布影响的数值模拟  

Numerical Simulation on Influence of Laser on Temperature Distribution of TIG Arc

作　　者：张文朝[1] 李志勇[1] 张强[1] 邢磊[1] 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051

出　　处：《热加工工艺》2013年第7期180-182,共3页Hot Working Technology

基　　金：山西省自然科学基金资助项目(2010011031-3);山西省回国留学人员科研基金资助项目(2012-6974)

摘　　要：在激光-TIG复合焊接过程中,根据激光与电弧等离子体相互作用原理及控制方程,利用有限元数值模拟方法研究激光对TIG焊接电弧等离子体温度分布的影响。在电弧稳定状态下,分别计算了不同焊接电流和激光强度的电弧等离子体温度分布情况,并由此分析激光对电弧等离子体温度分布的影响。结果表明:随着焊接电流的下降,激光对电弧温度的影响作用越来越明显,并且激光光强越大,影响越明显;决定电弧温度分布的主要因素也由焊接电流转变为由激光光强和焊接电流共同作用。本研究为进一步研究焊接质量奠定理论基础。In the process of laser -TIG （Tungsten Inert Gas welding） arc hybrid welding, according to the interaction principle of laser to arc plasma and the governing equation, the influences of laser to the TIG arc temperature distribution were simulated by finite element method. Under the condition of the arc in steady, the arc plasma temperature distribution in different welding current and laser intensity was calculated and then the influences of laser on the arc temperature distribution were analyzed. The results show that with the welding current decreasing and the laser intensity increasing, the influence of laser on the arc temperature distribution gets more obviously. The main factors to decide the are temperature distribution fi＇om weldin.g current change into welding current and laser intensity. It can provide theoretical basis for the further research of welding quality.

关 键 词：焊接电弧 等离子体 电弧温度 激光复合焊 数值模拟 

分 类 号：TG456[金属学及工艺—焊接]