Introduction of GTAW
GTAW, also known as tungsten inert gas (TIG) welding, is a type of arc welding which produces the weld using a non-consumable tungsten electrode. Inert gases such as argon or helium are used to protect the area being welded from contamination and most, although not all, welding applications will require filler metal. A column of plasma, made up of highly ionized gas and metal vapors, conducts energy across the arc and is produced by a constant-current welding power supply.
Unlike simpler welding methods which produce slag, or chips of metal that tend to chip off of the welds, GTAW is a much “cleaner” method of welding useful in situations requiring no welding slag, such as applications where a neat and attractive appearance is critical.
We could check the advantages and disadvantages for GTAW below:
|Clean, high-quality welds||Lower deposition rates|
|Welds a wide range of metals||Requires high level of operator skill|
|No spatter or slag, sparks, or smoke||Higher level of UV rays|
|Allows for welding in all positions||Requires good eye and hand coordination to achieve quality weld|
Among the numerous different types of welding processes available today, gas tungsten arc welding, or GTAW, is generally considered the most challenging welding method to master. With GTAW, the welder must maintain a very short arc length while preventing contact between the electrode and the work itself, requiring a great deal of training, skill and care. Two hands are usually required with GTAW, as one hand will be operating the welding torch while the other hand feeds the filler metal into the weld being created. Autogenous or fusion welds do not require filler metals and can be completed in cases such as edge, corner and butt joints combining thin materials.
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