High strength aluminium alloy brazing sheet

Details High strength aluminium alloy brazing sheet High strength aluminium alloy brazing sheet

B - Operations, Transporting

32

B

B32B 15/01 (2006.01) B23K 35/02 (2006.01) B23K 35/28 (2006.01) C22C 21/06 (2006.01)

Patent

CA 2531313

The present invention concerns a high strength aluminium alloy brazing sheet, comprising an Al-Cu core layer and at least one clad layer, said core layer comprising essentially the following composition (in weight percent): Cu: 1.2 - 4.0, Mn: 0.06 - 1.5, Mg: 0.06 - 1.5, Si: up to 0.5, Zn: :<= 0.4, Zr: :<= 0.25, Fe: :<= 0.5, Ti: :<= 0.25, Cr: :<= 0.25; V:<= 0.25; the balance essentially aluminium and impurities, said clad layer comprising an Al-Si based filler alloy and being applied on at least one side of the core layer. The invention further relates to a brazed assembly comprising said brazing sheet and to) the use of said brazing sheet for a brazing application such as a heat exchanger.

L'invention concerne une tôle pour brasage, constituée d'alliage d'aluminium, à haute résistance mécanique, comprenant une couche centrale Al-Cu et au moins une couche de placage, ladite couche centrale présentant sensiblement la composition suivante (en % en poids): Cu: 1,2 4,0, Mn: 0,06 1,5, Mg: 0,06 1,5, Si: jusqu'à 0,5, Zn: = 0,4, Zr: = 0,25, Fe: = 0,5, Ti: = 0,25, Cr: = 0,25; V: = 0,25; le reste étant constitué essentiellement d'aluminium et d'impuretés, ladite couche de placage comprenant un alliage d'apport à base de Al-Si et étant appliquée sur au moins un côté de la couche centrale. L'invention concerne également un ensemble brasé, comprenant ladite tôle, ainsi que l'utilisation de cette dernière pour une application de brasage, par exemple un échangeur de chaleur.

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