Welding of glassy metallic materials

Details Welding of glassy metallic materials Welding of glassy metallic materials

1976-11-24

1978-09-19

Truhe, J. V.

Electric heating

Metal heating

For bonding with pressure

219 912, 219120, 75123B, B23K 1116

Patent

active

041156820

ABSTRACT:
A process is provided for welding metal bodies together, at least one of the metal bodies comprising a metallic material that is at least 50% glassy. The process comprises (a) clamping overlapped portions of the bodies between electrodes and applying a clamping force to the overlapped portions; (b) passing an electrical current having a rapid decay such that at least about 90% of the energy is delivered in less than about 4 .times. 10.sup.-3 sec through the bodies to melt at least a portion of one of the bodies, and (c) extracting heat from the bodies through the electrodes at a rate of at least about 10.sup.5 .degree. C/sec by employing high conductivity electrodes having a thermal conductivity of at least about 0.30 cal/sec/cm.sup.2 /.degree. C to form a weld nugget joining the bodies. The weld nugget so formed has a shear strength which is at least 25% of the tensile strength of the body having the lowest tensile strength.

REFERENCES:
patent: 3394240 (1968-07-01), Broomhall
patent: 3592993 (1971-07-01), Bennett
patent: 3689731 (1972-09-01), Miller
patent: 3856513 (1974-12-01), Chen et al.
patent: 3941971 (1976-03-01), James, Jr.

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