Aa6000 aluminium sheet method

C - Chemistry – Metallurgy – 22 – F

Patent

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C22F 1/047 (2006.01) C22C 21/02 (2006.01) C22C 21/08 (2006.01)

Patent

CA 2362978

A method of converting an ingot of a 6000 series aluminium alloy to self- annealing sheet, comprises subjecting the ingot to a two-stage homogenisation treatment, first at at least 560 ~C and then at 450 ~C to 480 ~C, then hot rolling the homogenised ingot at a starting hot roll temperature of 450 ~C to 480 ~C and a finishing hot roll temperature of 320 ~C to 360 ~C. The resulting hot rolled sheet has an unusually low Cube recrystallisation component.

L'invention concerne un procédé permettant de convertir un lingot d'un alliage d'aluminium de série 6000 en une feuille à recuisson automatique. Ce procédé consiste à soumettre le lingot à un traitement d'homogénéisation en deux étapes, premièrement à une température d'au moins 560 ·C, puis à une température comprise entre 450 ·C et 480 ·C. Ce procédé consiste ensuite à laminer à chaud le lingot homogénéisé à une température de départ comprise entre 450 ·C et 480 ·C, puis à une température d'arrivée comprise entre 320 ·C et 360 ·C. On obtient ainsi une feuille laminée à chaud comprenant un composant de recristallisation Cube exceptionnellement bas.

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