Modulated spray MIG welding process and device

Details Modulated spray MIG welding process and device Modulated spray MIG welding process and device

1998-10-06

2000-08-29

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913051, 219137WM, B23K 909

Patent

active

061112186

ABSTRACT:
A process and a device for the gas-shielded MIG welding in modulated-spray mode, of aluminum, particularly aluminum alloys, or stainless steels, in which the current is modulated at a modulation frequency of less than 60 Hz. The shielding gas contains at least 90% helium, argon or a mixture thereof and at most 1.95% of at least one minor gaseous component chosen from oxygen and carbon dioxide. This process allows effective degassing of most of the diffusible hydrogen liable to be found in the pool of molten metal and improves the appearance and quality of the weld beads thus produced on workpieces or equipment intended for the rail, sea, air, road or space transport industry or for the chemical, petrochemical, electronic, nuclear or agrochemical industries.

REFERENCES:
patent: 3528100 (1970-09-01), Budy
patent: 3956610 (1976-05-01), Kanbe et al.
patent: 4366362 (1982-12-01), Ohta et al.
patent: 4912299 (1990-03-01), Oros et al.
patent: 5192851 (1993-03-01), James et al.
patent: 5432317 (1995-07-01), Church
patent: 5672286 (1997-09-01), Seeds

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