The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 1978
Filed:
Nov. 24, 1976
Sheldon Kavesh, Whippany, NJ (US);
Gerald R Bretts, Livingston, NJ (US);
Allied Chemical Corporation, Morris Township, Morris County, NJ (US);
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.