Shielding gas and arc-welding method

Details Shielding gas and arc-welding method Shielding gas and arc-welding method

2007-05-01

2007-05-01

Langel, Wayne A. (Department: 1754)

Electric heating

Metal heating

By arc

C219S074000, C219S075000, C252S372000

Reexamination Certificate

active

11154597

ABSTRACT:
The invention relates to a shielding gas for use in the arc welding of metallic work pieces. The invention further relates to a process for the arc welding of metallic work pieces using consumable electrodes, whereby a shielding gas stream is supplied to the work piece adjacent to the electrode. According to the invention, for shielding gases recommended for use in the MSG welding, preferably the MAG welding, of rust-proof steels, especially nickel-based materials, specialty steels, or high-alloy steels,a) if the shielding gas contains no helium, it contains carbon dioxide in a proportion of between 0.001% by volume and 1.9% by volume andb) if the shielding gas does contain helium, it contains carbon dioxide in a proportion of between 0.001% by volume and 0.9% by volume,in addition to argon, nitrogen, and, if applicable, helium.

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