基于串热源的MAG焊接温度场解析计算  

Analytical solution of temperature field during MAG welding process based on a group of elementary point heat sources along coordinate axes

作　　者：王后孝[1] 华鹏[1] 孙俊生[1] 杨致东[2] 

机构地区：[1]山东大学材料科学与工程学院材料液态结构及其遗传性教育部重点实验室,山东济南250061 [2]济南钢铁集团总公司,山东济南250101

出　　处：《山东大学学报（工学版）》2004年第1期25-29,共5页Journal of Shandong University（Engineering Science）

摘　　要：推导了工件上任意一移动点热源作用下温度场的瞬态解 ,将电弧热流和熔滴热焓量两部分构成的MAG焊接热输入近似处理为沿 3个坐标轴的一连串点热源 ,根据实验结果确定了热输入的分布模式 .计算了MAG焊的温度场 ,计算表明该模型能较精确地计算出熔合线的几何形状 ,预测熔深 .A transient temperature distribution solution on the workpiece is deri ved which is heated by a random movable point heat source. In the paper, the hea t input composing of the effective arc heat input and the droplet thermal enthal py is approximately treated as a group of elementary point heat sources along th ree axes during MAG welding process. Better distribution curves of the heat inpu t are attained with comparison of the trial and error. The temperature field dur ing MAG welding process is calculated. The calculated results indicate the model can better predict the geometry shape of the weldpool fusion line and the weld depth. Also, the predicted results have been compared with the experimental meas urements. A better agreement has been achieved between prediction and measuremen t which validates the reliability of the model.

关 键 词：MAG焊接 串热源 瞬态温度场 解析计算 

分 类 号：TG032[金属学及工艺]