(1) Welding the chemically active metals and alloys. Inert gases argon or helium do not chemically react with chemically active aluminum, titanium, magnesium, copper, nickel and their alloys, nor are they soluble in liquid metals, even at elevated temperatures. It is difficult to weld these materials with slag-protected welding methods such as hand or submerged arc welding, or they can not be welded at all.
(2) Physically available welded joints. Weld metal obtained by this welding method has high purity, less gas and gas inclusions, and less welding defects. Low-carbon steel, low-alloy steel, and stainless steel, which require high weld metal quality, are commonly used for this type of welding.
(3) Solderable thin pieces, small pieces.
(4) Single-sided welding and double-sided forming and welding all-position.
(5) Low welding productivity.
The welding current used by
TIG welding is limited by the tungsten current carrying capacity, the arc power is small, the arc penetration is small, the welding depth is shallow and the welding speed is low, and the tungsten electrode needs to be replaced frequently during the welding process.
