PROCESS FOR MIG WELDING OF NICKEL AND NICKEL ALLOYS WITH ARGON AND CO2-BASED PROTECTION GAS

摘要

P MIG welding process for nickel and nickel alloys, using gas protection of at least part of the welding zone, in which the gas protection is a gas mixture containing 0.05 % to 0. 5% CO2, and the rest being argon. Advantageously, the gas mixture also contains from 15 to 50% by volume of helium, preferably from 17% to 30% of helium, or from 0.1% to 10% by volume of hydrogen, preferably from 1% at 7% by volume of hydrogen. Gas mixtures intended for such a process. /P