Process for the MIG welding of aluminum and its alloys with a shielding gas of the Ar/He/O2 type
AssigneeL'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsJean-Marie Fortain, Philippe Lefebvre, Jean-Yves Mouton, Gerard Plottier
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Abstract
For MIG welding, either in a spray mode without current modulation or in a pulsed mode, of aluminum and aluminum alloys, with the use of a gas shield for at least part of the welding zone, the gas shield is a gas mixture consisting, by volume, of from 0.01% to 1.80% oxygen and from 15% to 98.2% helium, and any balance being argon.
Claims20
In a pulsed mode process for MIG welding of aluminum and aluminum alloys, which comprises passing a current through a meltable electrode to melt the electrode and form a welding zone, the improvement comprising the step of shielding at least part of the welding zone with a gas mixture consisting of, by volume, from 0.8% to 1.80% oxygen and from 15% to 98.20% helium, any balance being argon.
In a spray mode process without current modulation for MIG welding of aluminum and aluminum alloys, which comprises passing a current through a meltable electrode to melt the electrode and form a welding zone, the improvement comprising the step of shielding at least part of the welding zone with a gas mixture consisting of, by volume, from 0.8% to 1.80% oxygen and from 15% to 98.20% helium, any balance being argon.
Dependencies are inferred from the claim text.