Gas-tungsten arc welding of aluminum alloys

Details Gas-tungsten arc welding of aluminum alloys Gas-tungsten arc welding of aluminum alloys

1982-03-25

1984-11-20

Albritton, C. L.

Electric heating

Metal heating

By arc

219118, B23K 900

Patent

active

044840608

ABSTRACT:
A gas-tungsten arc welding method for joining together structures formed of aluminum alloy with these structures disposed contiguously to a heat-damagable substrate of a metal dissimilar to the aluminum alloy. The method of the present invention is practiced by diamond machining the fay surfaces of the aluminum alloy structures to provide a mirror finish thereon having a surface roughness in the order of about one microinch. The fay surfaces are aligned and heated sufficiently by the tungsten electrode to fuse the aluminum alloy contiguous to the fay surfaces to effect the weld joint. The heat input used to provide an oxide-free weld is significantly less than that required if the fay surfaces were prepared by using conventional chemical and mechanical practices.

REFERENCES:
patent: 3597832 (1971-08-01), Colton et al.
patent: 4163516 (1979-08-01), Burkhart et al.
NASA Technical Brief B73-10481, "Welding of High Strength Aluminum Alloys" (1973).
Cary, Howard B., Modern Welding Technology (1979), pp. 482-483.

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