Strip casting of immiscible metals

Details Strip casting of immiscible metals Strip casting of immiscible metals

B - Operations, Transporting

22

D

B22D 11/06 (2006.01) B22D 11/10 (2006.01) C22C 21/00 (2006.01)

Patent

CA 2683966

Method of strip casting an aluminum alloy from immiscible liquids that yields a thin strip 50 with highly uniform structure of fine second phase particles 401. One embodiment of the present invention includes a casting speed of about 50 to about 300 feet per minute (fpm) and the thickness of the strip in the range of about 0.08 to about 0.25 inches resulting in droplets of the immiscible liquid phase nucleate in the liquid ahead of the solidification front established in the casting process. The droplets of the immiscible phase are engulfed by the rapidly moving freeze front into the space between the Secondary Dendrite Arms (SDA).

L'invention concerne un procédé de coulage en bande d'un alliage aluminium à partir de liquides non miscibles permettant d'obtenir une fine bande (50) de structure très homogène de fines particules de seconde phase (401). Selon un mode de réalisation de la présente invention, il est prévu une vitesse de coulage d'environ 50 à environ 300 pieds par minute (ft/min)) et une épaisseur de bande de l'ordre d'environ 0,08 à environ 0,25 pouces, ce qui permet d'obtenir des gouttes du produit de nucléation de la phase liquide non miscible dans le liquide avant le front de solidification établi dans le processus de coulage. Les gouttes de la phase non miscible sont avalées par le front de gel à mobilité rapide dans l'espace compris entre les bras de dendrite secondaire (SDA).

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