Heat-resistant aluminium alloy for heat exchangers

Details Heat-resistant aluminium alloy for heat exchangers Heat-resistant aluminium alloy for heat exchangers

C - Chemistry, Metallurgy

22

C

C22C 21/00 (2006.01) C22F 1/04 (2006.01)

Patent

CA 2558108

The invention relates to a heat-resistant aluminium alloy for heat exchangers, a method for producing an aluminium strip or sheet for heat exchangers, and a corresponding aluminium strip or sheet. The aim of the invention is to provide an aluminium alloy and an aluminium strip or sheet which has a good recycling capacity, a Solidus temperature of at least 620 ~C, and an improved heat- resistance after welding. To this end, the inventive aluminium alloy comprises the following parts of alloy constituents in wt. %: 0.3 % <= Si <= 1 %, Fe <= 0.5 %, 0.3 % <= Cu <= 0.7 %, 1.1 % <= Mn <= 1.8 %, 0.15 % <= Mg <= 0.6 %, 0.01 % <= Cr <= 0.3 %, Zn <= 0.10 %, Ti <= 0.3 %, unavoidable impurities separately representing a maximum of 0.1 %, and together a maximum of 0.15 %, the remainder being aluminium.

L'invention concerne un alliage d'aluminium thermorésistant destiné à un échangeur de chaleur, un procédé de production d'une bande ou d'une tôle d'aluminium destinée à un échangeur de chaleur ainsi qu'une bande ou une tôle d'aluminium correspondante. L'invention vise à fournir un alliage d'aluminium et une bande ou une tôle d'aluminium ayant une bonne aptitude au recyclage, une température de solidus de 620 ·C minimum et une meilleure thermorésistante après le brasage. A cet effet, l'alliage d'aluminium selon l'invention présente les fractions suivantes comme constituants de l'alliage exprimées en % en poids: 0,3 % = Si = 1 %, Fe = 0,5 %, 0,3 % = Cu = 0,7 %, 1,1 % = Mn = 1,8 %, 0,15 % = Mg = 0,6 %, 0,01 % = Cr = 0,3 %, Zn = 0,10 %, Ti = 0,3 %, les impuretés inévitables individuellement 0,1 % maximum, en totalité 0,15 % maximum, le reste étant constitué d'aluminium.

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