Thermal degreasing in reactive atmospheres and subsequent brazin

Details Thermal degreasing in reactive atmospheres and subsequent brazin Thermal degreasing in reactive atmospheres and subsequent brazin

1989-09-05

1991-05-21

Ramsey, Kenneth J.

Metal fusion bonding

Process

With pretreating other than heating or cooling of work part...

22826317, 134 2, 134 3, B23K 120

Patent

active

050168096

ABSTRACT:
Aluminum-based sheets or parts, such as formed aluminum assemblies contaminated with forming die lubricants, are cleaned by a solventless, thermal degreasing process at controlled temperature (about 300.degree.-400.degree. F.), and in specified atmospheres (reactive gas which is at least at atmospheric pressure) prior to brazing. The organic contaminates on the aluminum-based sheet or part are reacted with the reactive gas (air or oxygen) and removed from the surface of the sheet or part without disruption of the underlying protective oxide layer. Subsequent brazing is thereby facilitated.

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Hetherington, "VLVAC Aluminum Brazing Furnaces" Supp. to VLVAC Sale Brochure E2009.

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