穿孔等离子弧焊接热效率的选取及应用  

Selection and application of thermal efficiency during keyhole plasma arc welding

作　　者：胡庆贤[1] 王晓丽[1] 王艳辉[1] 

机构地区：[1]江苏科技大学先进焊接技术省级重点实验室,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2011年第6期549-552,共4页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学青年基金资助项目(51005106);江苏科技大学博士启动基金资助项目(35060902)

摘　　要：对穿孔等离子弧焊接过程中的热量传递进行了分析,利用电弧物理法计算了焊接热源传递到工件上的有效热量,计算的焊接热效率与实验结果基本一致.应用选取的焊接热效率,分别对板厚为6 mm和8 mm的SUS304不锈钢的穿孔等离子弧焊接进行了焊接温度场的数值模拟,模拟结果与实验结果吻合良好.因此在进行焊接热过程模拟时,利用电弧物理法选取焊接热效率有助于加快模拟进程,获得更为精确的数值计算结果.After analyzing the heat transfer during keyhole plasma arc welding process, effective heat transfer from welding heat source to workpiece is calculated by the arc physical method, and the welding thermal efficien- cy calculated is basically consistent with the experimental one. Based on the computed thermal efficiency, the temperature fields in keyhole plasma arc welding of SUS304 stainless steel with 6 mm and 8 mm thickness are simulated respectively, which are in good agreement with the experimental data. The results show that it is help- ful for accelerating the calculation process and improving the simulation accuracy to select the welding thermal ef- ficiency using arc physical method in the simulation of welding thermal process.

关 键 词：穿孔等离子弧焊接 焊接热效率 电弧物理法 

分 类 号：TG445[金属学及工艺—焊接]