Metal fusion bonding – Process – With protecting of work or filler or applying flux
Reexamination Certificate
2008-05-27
2008-05-27
Kerns, Kevin P. (Department: 1793)
Metal fusion bonding
Process
With protecting of work or filler or applying flux
C029S890054, C428S550000
Reexamination Certificate
active
11017544
ABSTRACT:
A method of fabricating a heat exchanger includes brush electroplating plated layers for a brazing alloy onto a stainless steel tube in thin layers, over a nickel strike having a 1.3 μm thickness. The resultant Au-18 In composition may be applied as a first layer of indium, 1.47 μm thick, and a second layer of gold, 2.54 μm thick. The order of plating helps control brazing erosion. Excessive amounts of brazing material are avoided by controlling the electroplating process. The reticulated copper foam rings are interference fit to the stainless steel tube, and in contact with the plated layers. The copper foam rings, the plated layers for brazing alloy, and the stainless steel tube are heated and cooled in a vacuum furnace at controlled rates, forming a bond of the copper foam rings to the stainless steel tube that improves heat transfer between the tube and the copper foam.
REFERENCES:
patent: 2813790 (1957-11-01), Hack
patent: 3412458 (1968-11-01), Delnero
patent: 3683488 (1972-08-01), Cook et al.
patent: 3769101 (1973-10-01), Woodward
patent: 3778254 (1973-12-01), Cole et al.
patent: 4270986 (1981-06-01), Smith
patent: 4706256 (1987-11-01), Sheng et al.
patent: 4926647 (1990-05-01), Dorri et al.
patent: 5419156 (1995-05-01), Sywulka
patent: 5814880 (1998-09-01), Costello et al.
patent: 5943543 (1999-08-01), Uchida et al.
Howard Stanley R.
Korinko Paul S.
Aboagye Michael
Gottlieb Paul A.
Kerns Kevin P.
Roberts Esther L.
The United States of America as represented by the United States
LandOfFree
Brazing open cell reticulated copper foam to stainless steel... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brazing open cell reticulated copper foam to stainless steel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brazing open cell reticulated copper foam to stainless steel... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3943713