METHOD OF PRODUCING AN ALUMINIUM ALLOY BRAZING SHEET AND LIGHT BRAZED HEAT EXCHANGER ASSEMBLIES

摘要

The production of an aluminium alloy brazing strip comprises : (A) the casting of the aluminium alloy of a given composition; (B) homogenisation and/or preheating of the base metal; (C) unilateral or bilateral plating of the aluminium alloy with an aluminium-silicon (Al-Si) brazing alloy and reheating this assembly; (D) hot or cold rolling of the assembly to a first thickness; (E) recrystallisation annealing of the rolled assembly; (F) hardening of the rolled assembly under pressure to a second thickness with a deformation of 10 t0 40%; and (G) annealing the end of the brazing sheet at this second thickness. An independent claim is also included for an alternative method of producing an aluminium alloy brazing strip.