Process for manufacturing hard-soldered aluminum heat exchangers

Details Process for manufacturing hard-soldered aluminum heat exchangers Process for manufacturing hard-soldered aluminum heat exchangers

1996-12-23

1998-11-24

Bradley, P. Austin

Metal fusion bonding

Process

Plural joints

22826251, B23K 119, B23K 3102, B23K10114

Patent

active

058396462

ABSTRACT:
A process for manufacturing hard-soldered aluminum heat exchangers is provided. For heat exchangers which are provided with flat tubes of a narrow interior with, known soldering processing operating with a fluxing agent cannot be used or can only be used with extreme difficulty. For such flat tubes, and optionally for turbulence inserts which can be slid into such flat tubes, certain materials and coatings are provided which result in a soldered connection in the tube interior where, according to the new process, no fluxing agent is used.

REFERENCES:
patent: 3853547 (1974-12-01), Singleton, Jr.
patent: 5295302 (1994-03-01), Takai et al.
Japanese Abstract No. 07032133, Feb. 3, 1995.
Japanese Abstract No. 1-249261, M-913 Dec. 26, 1989 vol. 13/No. 591.

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