Fluxless brazing method and compositions of layered material...

B - Operations – Transporting – 23 – K

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B23K 35/00 (2006.01) B23K 35/02 (2006.01) C25D 3/12 (2006.01) C25D 5/44 (2006.01) F28F 21/08 (2006.01)

Patent

CA 2467583

A brazing product for fluxless brazing comprises an aluminum or aluminum alloy substrate; a layer of an aluminum eutectic-forming layer applied to the substrate, and a braze-promoting layer comprising one or more metals from the group comprising nickel, cobalt and iron is applied on the eutectic-forming layer. The eutectic-forming layer is preferably Si deposited by physical vapor deposition. The brazing product may be brazed to another aluminum shape or to a shape comprised of a dissimilar metal.

L'invention concerne un produit de brasage conçu pour le brasage sans flux, comprenant un substrat d'aluminium ou d'alliage d'aluminium ; une couche de formation eutectique d'aluminium appliquée sur ledit substrat ; ainsi qu'une couche favorisant le brasage comprenant un ou plusieurs métaux issus du groupe comprenant du nickel, du cobalt et du fer, et appliquée sur la couche de formation eutectique. Cette couche de formation eutectique est de préférence du Si déposé par dépôt physique en phase vapeur. Ledit produit de brasage peut être brasé sur une autre forme d'aluminium ou sur une forme constituée d'un métal de nature différente.

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