Tandem welding shielding gases

Details Tandem welding shielding gases Tandem welding shielding gases

2005-11-29

2005-11-29

Kerns, Kevin P. (Department: 1725)

Electric heating

Metal heating

Nonatmospheric environment at hot spot

C219S129000

Reexamination Certificate

active

06969818

ABSTRACT:
A shielding gas for gas shielded metal-arc welding or brazing with multiple (in particular 2) wire electrodes, one common melting bath, and multiple power sources. Such shielding gases contain, for example, a small percentage of carbon dioxide or doping gas and possibly hydrogen, 10%–75% helium, with the remainder argon. The process is applicable to aluminum materials and low alloy or high alloy steels, for example.

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