TIG welding characteristics

Because the arc burns in argon, this welding method offers the following advantages and disadvantages:
1) Argon provides excellent protection, effectively isolating the surrounding air. Argon itself neither reacts chemically with nor dissolves in metals, making the metallurgical reactions during welding simple and easy to control, thus providing excellent conditions for obtaining high-quality welds.
2) The tungsten arc is extremely stable, burning stably even at very low currents (<10A), making it particularly suitable for welding thin sheet materials.
3) The heat source and filler wire can be controlled separately, making heat input easily adjustable. This method allows for all-around welding and is ideal for achieving single-sided welding with double-sided finishes.
4) Since no current passes through the filler wire, spatter is eliminated, resulting in a beautiful weld.
5) AC argon arc welding automatically removes oxide films from the weld surface during welding, making it suitable for successfully welding chemically active non-ferrous metals such as aluminum, magnesium, and alloys. 6) The tungsten electrode has a poor current-carrying capacity. Excessive current can cause the tungsten electrode to melt and evaporate, potentially entering the weld pool and causing tungsten inclusions. Consequently, the deposition rate is slow, the weld depth is shallow, and productivity is low.
7) Using argon gas is expensive, resulting in a low deposition rate. Furthermore, argon arc welding machines are complex, resulting in higher production costs compared to other welding methods (such as metal arc welding, submerged arc welding, and CO2 gas shielded welding).
8) The argon arc is significantly affected by airflow, making it difficult to operate outdoors.