Dip Brazing Aluminum
Dip Brazing Aluminum
(OP)
Hello All,
I have an aluminum (6061) disk with slots cut into it. Aluminum fins (also 6061) will be inserted into the slots and joined using dip brazing. As far as I know, dip brazing process involves a bath of sodium, potassium, lithium and aluminum. Has anyone ever heard of using silver in the brazing process of aluminum? If so, how common is that? I know silver is used in brazing of copper and copper alloys but I don't think it's used with aluminum.
I have an aluminum (6061) disk with slots cut into it. Aluminum fins (also 6061) will be inserted into the slots and joined using dip brazing. As far as I know, dip brazing process involves a bath of sodium, potassium, lithium and aluminum. Has anyone ever heard of using silver in the brazing process of aluminum? If so, how common is that? I know silver is used in brazing of copper and copper alloys but I don't think it's used with aluminum.





RE: Dip Brazing Aluminum
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessor.com
RE: Dip Brazing Aluminum
As an example 6061 is reported with melting range of 1100 to 1200 F (593 to 649 C).
The lowest solidus point of common Silver brazing alloys is reported as 1125 F (605 C).
For dip brazing one common filler product is a brazing sheet, consisting in a layer of aluminum silicon alloy foil roll bonded to sheets of structural aluminum alloy.
Fluxes are generally of proprietary compositions but they should be periodically maintained with additions of fluorides and chlorides, and controlled for water and heavy metal content. Periodic additions have to be performed for compensating drag-out.
http://www.welding-advisers.com/
RE: Dip Brazing Aluminum
RE: Dip Brazing Aluminum