1. Process description

1.1 Principle

The general principle of the TIG process is shown in figure 1 .

The electric arc, produced by the passage of current through the ionized shielding gas, is established between the tip of the electrode and the workpiece. The heat generated by the arc melts the metal. Once the molten pool is established, the torch is moved along the joint to complete the weld.

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Process description

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TIG process variables

Bibliography

(1) - LIU (L.), HAO (X.), SONG (G.) - Anew Laser – arc hybrid welding technique based on energy conservation – - Materials Transaction, Vol 47, N° 6, p 1611-1614 (2006).
(2) - BERTHIER (A.), PAILLARD (P.), CARIN (M.), PELLERIN (S.), VALENSI (F.) - TIG...

Standards and norms

Welding and related techniques – Process nomenclature and numbering. - NF EN ISO 4063 - (février 2011),
Arc welding and cutting – Non-consumable tungsten electrodes – Classification. - NF EN ISO 6848 - (décembre 2015),
Welding and related techniques – Types of joint preparation – Part 1: Manual metal arc welding, gas-shielded metal arc welding, gas welding, TIG welding and beam welding of steels. - NF EN...