TIG 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