L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Air Liquide Welding France

Laurent Biskup

Philippe Lefebvre

Jean-Marie Fortain

Jean-Yves Mouton

Didier Marchand

Jean-Yves Square De l'Echiquier Mounton

Jean-Pierre Planckaert

Michel Saez

Gilles Boudet

Process for the MIG welding of nickel and nickel alloys, with the use of a gas shield for at least part of the welding zone, in which process the gas shield is a gas mixture containing from 0.05% to 0.5% CO , the balance being argon. Advantageously, the gas mixture also contains, by volume, from 15 to 50% helium, preferably from 17% to 30% helium, or from 0.1% to 10% hydrogen by volume and preferably from 1% to 7% hydrogen by volume.

Process for the MIG welding of nickel and nickel alloys with a shielding gas based on argon and CO2

The invention relates to a process and a unit for the MIG welding of aluminum and its alloys, employing gaseous shielding of the welded zone, composed of a central flow of gas consisting of argon and/or oxygen and of a peripheral gas stream consisting of argon or a mixture of argon and helium. The MIG welding process of the invention allows effective welding of workpieces made of aluminum or aluminum alloys by improving the penetration of the weld and the wetting of the weld bead, that is to say the angle of connection of the weld bead to the welded workpieces.

Process and unit for the mig welding of aluminum and its alloys

Growing community of inventors

Gisors, France

Laurent Biskup