Method and apparatus for controlled atmosphere brazing of unweld

Details Method and apparatus for controlled atmosphere brazing of unweld Method and apparatus for controlled atmosphere brazing of unweld

1997-03-21

1999-09-28

Leo, Leonard

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

29 89054, 165153, 165173, 165178, 165905, F28D 1053, F28F 916

Patent

active

059568461

ABSTRACT:
A heat exchanger assembly with a first header, a second header, a plurality of seamed or folded type heat exchanger tubes extending between the two headers, and a plurality of heat exchanger fins. Each of the plurality of fins has between 0.01% and 0.9% magnesium to improve the braze between the header and tube joint and the tube seam to inner surface joint. Additionally, the headers have a cladded inner surface with between about 0% to about 12.6% silicon to improve the braze at the tube-to-header joint.

REFERENCES:
patent: 4574878 (1986-03-01), Sugiyama et al.
patent: 4636356 (1987-01-01), Iwasaki et al.
patent: 4716959 (1988-01-01), Aoki
patent: 4825941 (1989-05-01), Hoshino et al.
patent: 4949543 (1990-08-01), Cottone et al.
patent: 4991647 (1991-02-01), Kawabe et al.
patent: 5054549 (1991-10-01), Nakaguro
patent: 5579837 (1996-12-01), Yu et al.

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