Flux-coated metal components

Details Flux-coated metal components Flux-coated metal components

1996-10-04

1998-06-02

Jenkins, Daniel J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428553, 428469, 419 8, 419 9, 419 10, 148528, 2281115, B23K 120, B22K 704

Patent

active

057597073

ABSTRACT:
Metal structures, e.g. coolers or heat exchangers, can be produced by placing together metal components coated with solder, dipping them into a slurry of a flux, and soldering them by heating. Alternatively, components coated with solder can also be coated with flux, then placed together to form the metal structure and soldered by heating. In this case, however, the flux must be applied so as to adhere securely, and to this end in the prior art the flux has been "glued on" to the metal surface by organic or other binders, which when burned out during the soldering process can produce undesirable exhaust gases or emissions. The present invention discloses a metal component which is provided with a sintered flux coating which adheres without binder. The coating can optionally also contain solder metal or other auxiliaries dispersed therein. The coating is applied, for example, by contacting the metal component with a binder-free slurry of the flux or dry coating the metal component electrostatically, and then heating the coated component while avoiding melting of the flux, so that an adherent sintered flux coating is formed on the metal component. The use of these coated metal components for the production of soldered metal structures and metal structures obtained using such components are also described. Potassium fluoroaluminate flux is particularly advantageously used.

REFERENCES:
patent: 4579605 (1986-04-01), Kawase et al.
patent: 4723597 (1988-02-01), Sonoda
patent: 4781320 (1988-11-01), Fujiyoshi
patent: 5100048 (1992-03-01), Timsit
patent: 5171377 (1992-12-01), Shimizu et al.
patent: 5190596 (1993-03-01), Timsit
patent: 5428920 (1995-07-01), Levin

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