Light-weight, high strength beryllium-aluminium alloy

C - Chemistry – Metallurgy – 22 – C

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C22C 25/00 (2006.01)

Patent

CA 2148259

A light weight, high strength temary or higher-order cast beryllium-aluminum alloy, including approximately 60 to 70 weight % beryllium, one or both of from approximately 0.5 to 4 weight % silicon and from 0.2 to 4.25 weight % silver, with the balance aluminum. Beryllium strengthening elements selected from the group consisting of copper, nickel, or cobalt may be present at from 0.1 to 0.75 weight % of the alloy to increase the alloy strength.

La présente invention a pour objet un alliage coulé de béryllium-aluminium tertiaire ou d'ordre plus élevé, de faible poids et de résistance élevée, composé d'environ 60 % à 70 % en poids de béryllium, d'environ 0,5 % à 4 % en poids de silicium ou d'environ 0,2 % à 4,25 % en poids d'argent ou les deux, le restant de l'alliage étant composé d'aluminium. Des éléments de renforcement du béryllium sélectionnés parmi le groupe formé par le cuivre, le nickel et le cobalt peuvent être présents dans une proportion de 0,1 % à 0,75 % en poids de l'alliage pour en accroître la résistance.

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