Method of brazing a heat exchanger using a reaction flux

Details Method of brazing a heat exchanger using a reaction flux Method of brazing a heat exchanger using a reaction flux

1987-04-06

1989-06-27

Ramsey, Kenneth J.

Metal fusion bonding

Process

Plural joints

228198, 228219, 228224, 22826317, B23K 112

Patent

active

048421855

ABSTRACT:
A method of producing a heat exchanger comprising abutting a tube made of an aluminum material and fins made of an aluminum material, applying to the resulting abutments a flux containing zinc halide, and thereafter conducting a reaction soldering in an inert gas atmosphere. The assembled tube and fins applied with the flux may be moved into a position to enhance the formation if zinc deposited by the reaction soldering during the drying step of the flux. The heat exchanger produced by this method has a thick and uniform Zn coating at the joints with good mechanical strength and surface conditions.

REFERENCES:
patent: 2508501 (1950-05-01), Di Giulio
patent: 2867037 (1959-01-01), Lawton
patent: 4560625 (1985-12-01), Kaifu et al.
patent: 4645119 (1987-02-01), Haramaki et al.

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