L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Henri Diot

Richard Soula

Didier Marchand

Philippe Rouault

Shielding gas mixture and process for arc welding of stainless steel

The arc welding, with a refractory electrode, using alternating current, is performed with a gaseous protective mixture including at the location of the weld, at least 50%, typically between 60 and 80% of helium and at least 300 vpm, typically between 400 and 800 vpm, of nitrogen, the remainder being argon. Application to manual or automatic welding of aluminium components.

Process and gaseous mixture for arc welding of aluminium components

The arc welding, with a refractory electrode, using alternating current, is performed with a gaseous protective mixture employing, at the location of the weld, at least 60%, typically between 70 and 80% of helium and more than 1000 vpm, typically between 1100 and 1200 vpm, of carbon dioxide, the remainder being argon. Application to manual or automatic welding of aluminium components.

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Saint-Ouen-L'Aumone, France

Henri Diot