C - Chemistry – Metallurgy – 22 – F
Patent
C - Chemistry, Metallurgy
22
F
C22F 1/04 (2006.01) C22C 21/00 (2006.01) C22C 21/02 (2006.01) C22F 1/043 (2006.01)
Patent
CA 2308391
A process for the production of a base foil of an aluminum alloy is provided which comprises a first heating step in which a cold-rolled plate derived from a continuously cast-rolled plate is maintained at a temperature between higher than 350 ~C and lower than 450 ~C for longer than 0.5 hour, the cast-rolled plate being comprised of a Al-Fe-Si type aluminum alloy, the aluminum alloy containing Fe in a content between more than 0.3 % by weight and less than 1.2 % by weight and Si in a content between more than 0.20 % by weight and less than 1 % by weight and having a Si/Fe ratio between above 0.4 and below 1.2, and a second heating step in which the resultant plate is maintained at a temperature between higher than 200 ~C and lower than 330 ~C for longer than 0.5 hour. The base foil is substantially free of macroscopic and microscopic rib patterns on its rolled and mat surfaces.
Cette invention concerne un procédé de production d'une feuille de base métallique faite d'un alliage d'aluminium. Ce procédé comprend une première étape de chauffage au cours de laquelle une plaque laminée à froid, et provenant d'une plaque laminée et coulée de manière continue, est maintenue à une température de plus de 350· C mais de moins de 450· C pendant plus d'une demi-heure. La plaque laminée et coulée se compose d'un alliage d'aluminium de type Al-Fe-Si dont le contenu en Fe varie de plus de 0,3 à moins de 1,2 % en poids et dont le contenu en Si varie de plus de 0,20 à moins de 1 % en poids, le rapport Si/Fe variant de plus de 0,4 à moins de 1,2. Au cours d'une seconde étape de chauffage, la plaque ainsi obtenue est maintenue à une température supérieure à 200· C mais inférieure à 300· C pendant plus d'une demi-heure. Les surfaces laminée et mate de la feuille de base métallique ne comportent pratiquement pas de motifs de type nervures microscopiques ou macroscopiques.
Ishii Hidehiko
Jin Iljoon
Katano Masahiko
Alcan International Limited
Rogers Law Office
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