Shielding gas for arc welding of aluminum
AssigneeMesser Griesheim GmbH
InventorAlfward Farwer
Life of this patent
Estimating the term…
Abstract
A shielding gas for the arc welding of aluminum consists of argon or mixtures of argon and helium. The shielding gas also includes an admixture of 80 ppm to 250 ppm of nitrogen.
Claims6
In a shielding gas for the arc welding of aluminum, consisting of argon, the improvement being in an admixture of 80 ppm to 250 ppm of nitrogen to the gas whereby said shielding gas consists solely of argon and nitrogen.
In a process for tungsten-inert gas welding and metal-inert gas welding of aluminum, the improvement being in that 180 ppm to 250 ppm of nitrogen are added to the inert gas consisting or argon or of mixtures of argon and helium.
In a shielding gas for the arc welding of aluminum, consisting of a mixture of argon and helium, the improvement being in an admixture of 80 ppm to 250 ppm of nitrogen to the gas whereby said shielding gas consists solely of argon, helium and nitrogen.
Dependencies are inferred from the claim text.