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Job knowledge for welders 6: Tungsten inert gas (TIG or GTA) welding (1076 words) |
 | TIG has played a major role in the acceptance of aluminium for high quality welding and structural applications. |
| In the TIG process the arc is formed between a pointed tungsten electrode and the workpiece in an inert atmosphere of argon or helium. |
| TIG is applied in all industrial sectors but is especially suitable for high quality welding. |
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TIG welders, gas tungsten, heliarc tig welding machines, welder information (612 words) |
| TIG welding is a manual welding process that uses a non-consumable electrode made of tungsten, an inert or semi-inert gas mixture, and a separate filler material. |
| TIG may be used without the addition of a filler metal or a separate wire filler metal can be added into the puddle when additional material is required, much like the process in oxy-acetylene welding. |
| TIG also produces a welding heat is that is confined between the weld and base metal at the point of fusion and produces a narrow heat affected zone. |
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