Weld/brazing of light metal alloys

Details Weld/brazing of light metal alloys Weld/brazing of light metal alloys

1995-04-24

1999-10-05

Walberg, Teresa

Electric heating

Metal heating

For bonding with pressure

219 94, 219 912, B23K 1111, B23K 1118

Patent

active

059618531

ABSTRACT:
Method of resistance brazing of light metal alloys to form a corrosion resistant structural assembly, comprising: positioning a patch (thickness of about 0.05-0.25 mm and an aspect ratio of about one) of brazing filler metal between and in contact with superimposed light metal (i.e., aluminum, titanium) alloy structural workpieces to define a joining spot, said filler metal consisting of 7-13% silicon, substantial absence of magnesium and copper for aluminum workpieces, and the balance said light metal; while applying high pressure to force the workpieces together at the joining spot to achieve a structural joint, resistively heating the patch to melting without softening the workpieces, except at interfaces with the filler metal, by flowing an electrical current through the patch and aligned portions of the workpieces under ambient conditions and in the absence of flux, the heating and pressure being sufficient to mechanically break up and eliminate any oxides in the workpieces at the joining spot.

REFERENCES:
patent: 434468 (1890-08-01), Robb
patent: 1367522 (1921-02-01), Kicklighter
patent: 3121785 (1964-02-01), Terrill et al.
patent: 3214564 (1965-10-01), Katzer et al.
patent: 3592993 (1971-07-01), Bennett

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