TIG-MIG间接电弧焊工艺

TIG-MIG indirect arc welding process

经过对传统的TIG焊接系统进行改造,使电弧在钨极和焊丝之间产生并稳定燃烧,建立了TIG-MIG间接电弧焊系统.以30CrMnSi为母材,CuSi3为焊丝,进行了TIG-MIG间接电弧堆焊试验.通过改变焊接工艺参数,分析了焊接电流和送丝速度对焊接稳定性的影响,分析了钎剂、焊接电流、焊接速度、焊枪距工件表面高度对接头成形的影响.结果表明,TIG-MIG间接电弧焊工艺可以在明显提高焊丝熔覆率的同时降低工件的热输入,减小熔覆合金与工件的互溶,抑制有害的泛铁现象,拓展了电弧焊的应用.

A TIG-MIG indirect arc welding system was set up by reforming the traditional TIG welding system in which the arc was ignited and burnt steadily between the tungsten and the welding wire.This new process was used to deposit CuSi3 welding wire onto the 30CrMnSi steel plate.The effect of welding current and feeding wire speed on the consistency of the welding process and the effect of the flux,welding current,welding speed and distance between the tungsten and the welding wire were analyzed by changing the welding process parameters.The result shows that by choosing the proper process parameters,low heat input and high deposition ratio joint can be obtained in TIG-MIG indirect arc welding process,at the some time,the deleterious iron picking up can be also retrained for the decreasing of the mutual solution between the deposited metal and the work piece.