High-strength alloy for heat exchangers

Details High-strength alloy for heat exchangers High-strength alloy for heat exchangers

C - Chemistry, Metallurgy

22

C

C22C 1/02 (2006.01) C22F 1/05 (2006.01)

Patent

CA 2533428

The invention relates to a cold-hardened aluminium alloy for heat exchangers, a method for production of a cold-hardened aluminium strip or sheet and an aluminium strip or sheet. According to the invention, a cold-hardened aluminium alloy for heat exchangers may be provided which permits an economic application of inert gas shielded welding for the production of heat exchangers and with high resistance after a natural hardening after the welding, whereby the aluminium alloy has the following alloy components in wt. %: Si <= 0.7%, 0.1% <= Mg <= 1, Fe <= 0.3%, 0.08% <= Cu <= 0.2%, Ti <= 0.2%, Mn <= 0.1%, Cr <= 0.1%, Zn <= 0.1%, unavoidable impurities individually max. 0.1%, in total max. 0.15% and remainder aluminium.

L'invention concerne un alliage d'aluminium durcissant à froid pour un échangeur thermique, un procédé pour réaliser une bande d'aluminium durcissant à froid ainsi qu'une bande d'aluminium ou une tôle d'aluminium. L'invention vise à réaliser un alliage d'aluminium durcissant à froid pour un échangeur thermique, cet alliage permettant une utilisation rentable du brasage sous gaz naturel lors de la fabrication d'échangeurs thermiques et présentant simultanément des valeurs de résistance élevée après vieillissement naturel suite au brasage. A cet effet, l'alliage d'aluminium comprend les proportions suivantes en pourcentages en poids: Si = 0,7 %, 0,1 % = Mg = 1, Fe = 0,3 %, 0,08 % = Cu = 0,2 %, Ti = 0,2 %, Mn = 0,1 %, Cr = 0,1 %, Zn = 0,1 %, des éléments indésirables représentant chacun au maximum 0,1 % et au maximum 0,15 % en tout, le reste étant de l'aluminium.

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