GTAW WELDING

GTAW Welding
Gas Tungsten Arc Welding (GTAW) is
frequently referred to as TIG welding. TIG
welding is a commonly used high quality
welding process. TIG welding has become a
popular choice of welding processes when high
quality, precision welding is required.
In TIG welding an arc is formed between a
nonconsumable tungsten electrode and the
metal being welded. Gas is fed through the
torch to shield the electrode and molten weld
pool. If filler wire is used, it is added to the
weld pool separately.
TIG Welding Benefits
Superior quality welds
Welds can be made with or without filler
metal
Precise control of welding variables (heat)
Free of spatter
Low distortion
Shielding Gases
Argon
Argon + Hydrogen
Argon/Helium
Helium is generally added to increase heat input
(increase welding speed or weld penetration).
Hydrogen will result in cleaner looking welds and
also increase heat input, however, Hydrogen may
promote porosity or hydrogen cracking.
GTAW Welding Limitations
Requires greater welder dexterity than MIG or
stick welding
Lower deposition rates
More costly for welding thick sections
Common GTAW Welding Concerns
We can help optimize your welding process variables. Evaluate
your current welding parameters and techniques. Help eliminate
common welding problems and discontinuities such as those
listed below:
Weld Discontinuities
Undercutting
Tungsten inclusions
Porosity
Weld metal cracks
Heat affected zone cracks
TIG Welding Problems
Erratic arc
Excessive electrode consumption
Oxidized weld deposit
Arc wandering
Porosity
Difficult arc starting
If your company is experiencing these or other welding problems
you can retain AMC to improve your weld processing. Hire AMC
to act as your welding specialist.