Experimental research of hybrid welding processes in combination of gas tungsten arc with CO2- or Yb:YAG-laser beam
Experimental research of hybrid welding processes in combination of gas tungsten arc with CO2- or Yb:YAG-laser beam
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DOI：
10.2351/1.4944096
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发表时间：
2016-03
影响因子：
2.1
通讯作者：
U. Reisgen;I. Krivtsun;B. Gerhards;A. Zabirov
中科院分区：
文献类型：
--
作者：
U. Reisgen;I. Krivtsun;B. Gerhards;A. Zabirov
复合焊接是将多个焊接工序组合在一个熔池中进行焊接的焊接技术领域。目前正在尝试将这些进程的积极性质结合起来，以便产生协同效应并加以利用。对复合焊接工艺进行了对比实验分析。采用的复合焊接工艺是钨阴极在氩气保护气氛中与不同波长的激光(CO_2和Yb：YAG激光)相结合。这两种激光器都是在换热模式下使用的，没有小孔。为了进行这些实验，研制了一种特殊的混合焊枪，将弧热源和激光热源结合在一个共同的熔池中。比较了纯钨惰性气体(TIG)激光、TIG+CO2激光和TIG+Yb：YAG激光的熔透深度和焊缝横截面面积。使用具有同步电流和电压记录的高速视频图像(500帧/秒)。实验结果表明，在CO2和Yb：YAG激光复合焊接中，电弧表现出不同的行为。结果表明，在复合焊接情况下，电弧的输入能量效率高于两个单独使用的热源的总和。
Hybrid welding is a field in welding technology in which several welding procedures are combined to operate in one weld bath. An attempt is being made to combine the positive properties of the processes in a way that synergy effects take place and can be taken advantage of. Comparative experimental analysis of hybrid welding processes is carried out. The used hybrid welding process is a combination of tungsten cathode in argon shielding gas atmosphere and laser beam of different wave lengths (CO2- and Yb:YAG laser). Both lasers were used in heat transfer mode, without keyhole. To carry out these experiments, a special hybrid welding torch was developed to combine arc and laser heat sources in one common weld pool. Depth of penetration and the area of welds' cross sections for pure tungsten inert gas (TIG), TIG plus CO2 laser, and TIG plus Yb:YAG laser were compared. High-speed video images (500 frames per second) with synchronized current and voltage recording were used. The experimental results demonstrate a different behavior of the arc in CO2- and Yb:YAG laser hybrid welding. It is shown that in case of hybrid welding the efficiency of input energy from the arc is higher than the sum of two separately used heat sources.