Brazing sheet and method

B - Operations – Transporting – 23 – K

Patent

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Details

B23K 35/14 (2006.01) B23K 35/02 (2006.01) B23K 35/28 (2006.01) B32B 15/01 (2006.01) C22C 21/00 (2006.01) F28F 21/08 (2006.01)

Patent

CA 2434826

The present invention is directed to a brazing sheet comprising an aluminum 3xxx series core alloy, wherein at least one side thereof is provided with an aluminum clad material comprising by weight 0.7-0 % Mn and 0.7-3.0 % Zn, wherein the clad is capable of being used as an inner-liner of a heat exchanger product. In one embodiment, one side of the core alloy is provided with a materiel that comprises 0.7-2.0 % Mn and 0.7-3.0 % Zn and the other side of the core is provided with an aluminum alloy comprising at least 5.5 % Si. There are further provided methods for preparing brazing sheets as described herein as well as methods for use of brazing sheet materials including as tube stock and as heat exchangers, as well as other applications.

La présente invention concerne une feuille de brasage qui comprend un alliage de noyau en aluminium série 3xxx dont au moins un côté est pourvu d'un matériau de revêtement en aluminium qui comprend, en poids, 0,7-2,0 % de Mn et 0,7-3,0 % de Zn, le revêtement pouvant être utilisé comme doublure d'un produit pour échangeur de chaleur. Dans un mode de réalisation, un côté de l'alliage de noyau est pourvu d'un matériau qui comprend 0,7-2,0 % de Mn et 0,7-3,0 % de Zn, l'autre côté comprenant de l'alliage d'aluminium comprenant au moins 5,5 % de Si. L'invention concerne aussi des procédés pour préparer des feuilles de brasage ainsi que des procédés pour utiliser les matériaux de brasage, y compris dans des tubes laminés ou dans des échangeurs de chaleur ainsi que dans d'autres applications.

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