Al-cu-li alloy product suitable for aerospace application

C - Chemistry – Metallurgy – 22 – C

Patent

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Details

C22C 21/12 (2006.01) C22C 21/16 (2006.01) C22C 21/18 (2006.01) C22F 1/057 (2006.01)

Patent

CA 2700250

The present invention relates to an aluminium alloy product for structural members having a chemical composition comprising, in wt.%: Cu 3.4 to 5.0, Li 0.9 to 1.7, Mg about 0.2 to 0.8, Ag about 0.1 to 0.8, Mn about 0.1 to 0.9, Zn up to 1.5, and one or more elements selected from the group consisting of: (Zr about 0.05 to 0.3, Cr about 0.05 to 0.3, Ti about 0.03 to 0.3, Sc about 0.05 to 0.4, Hf about 0.05 to 0.4), Fe < 0.15, Si < 0.5, normal and unavoidable impurities and balance aluminium.

La présente invention porte sur un produit en alliage d'aluminium pour des éléments structuraux ayant une composition chimique comprenant : du Cu jusqu'à 5 % en poids, du Li jusqu'à 1,7 % en poids, du Mg entre 0,2 et 0,8 % en poids, de l'Ag entre 0,1 et 0,8 % en poids, du Mn entre 0,1 et 0,9 % en poids, du Zn jusqu'à 1,5 % en poids et un ou plusieurs éléments sélectionnés parmi le groupe se composant du Zr entre 0.05 et 0.3 % en poids, du Cr entre 0.05 et 0.3 % en poids, du Ti entre 0.03 et 0.3 % en poids, du Sc entre 0.05 et 0.4 % en poids, du Hf entre 0.05 et 0.4 % en poids, du F < 0.15, du Si < 0.5, des impuretés normales et inévitables et le restant étant de l'aluminium.

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