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电极因素（材料、直径及端部形状）是ＴＩＧ焊的一个重要工艺因素，对电弧的导电特征，电磁压缩效果及等离子流的形态具有决定性的作用。采用不同的电极因素，电弧形态、电弧电压以及电弧能量场和压力场的分布表现出明显的差异，因而电极因素对于ＴＩＧ弧的焊接工艺性（如电弧的稳定性、焊缝的形状特征、对工件的净化作用、交流弧的直流分量以及电极的损耗量等）具有重要的影响。本文采用多种测试手段，在不同电极因素条件下，对ＴＩＧ弧的物理特性及焊接工艺性进行了系统的试验研究，对各种电极因素的影响规律进行了探讨，并作了初步评定。此外，还对电极因素与其它工艺参数的合理匹配提出了建议。
Electrode factors (material, diameter and end shape) are an important process factor for TIG welding and have a decisive effect on the electrical characteristics of the arc, the electromagnetic compression effect and the morphology of the plasma flow. Different electrode factors, arc shape, arc voltage and the distribution of arc energy field and pressure field show obvious differences. Therefore, the welding process of TIG arc (such as the stability of arc, shape feature of weld, The purification of the workpiece, AC arc DC component and electrode wear, etc.) have a significant impact. In this paper, a variety of test methods, under different electrode conditions, TIG arc physical properties and welding process of a systematic experimental study of the impact of various electrode factors were discussed and made a preliminary assessment. In addition, the electrode factors and other process parameters reasonable recommendations made.