Aluminium-based alloy and method of fabrication of...

C - Chemistry – Metallurgy – 22 – C

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C22C 21/12 (2006.01) C22C 21/14 (2006.01) C22C 21/16 (2006.01) C22C 21/18 (2006.01) C22F 1/057 (2006.01)

Patent

CA 2417567

This invention relates to the field of metallurgy, in particular to high strength weldable alloy with low density, of aluminium-copper-lithium system. Said invention can be used in air- and spacecraft engineering. The suggested alloy comprises copper, lithium, zirconium, scandium, silicon, iron, beryllium, and at least one element from the group including magnesium, zinc, manganese, germanium, cerium, yttrium, titanium. Also there is suggested the method for fabrication of semiproducts' which method comprising heating the as- cast billet prior to rolling, hot rolling, solid solution treatment and water quenching, stretching and three-stage artificial ageing.

L'invention concerne le domaine de la métallurgie et, en particulier, un alliage soudable à haute résistance et basse densité, du système aluminium-cuivre-lithium, utilisé en ingénierie aérospatiale. L'alliage selon l'invention comprend les éléments suivants : cuivre, lithium, zirconium, scandium, silice, fer, béryllium, et au moins un élément choisi dans le groupe comprenant le magnésium, zinc, manganèse, germanium, cérium, yttrium, titane. L'invention concerne en outre un procédé de fabrication de semi-produits comprenant les opérations suivantes, chauffage de billettes brutes de coulée avant laminage à chaud, laminage à chaud, traitement de la solution solide et trempe à l'eau, étirage et vieillissement artificiel en trois étapes.

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