Al-cu alloy with high toughness

Details Al-cu alloy with high toughness Al-cu alloy with high toughness

C - Chemistry, Metallurgy

22

C

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

Patent

CA 2493399

Disclosed is an AI-Cu alloy of the AA2000-series alloys with high toughness and an improved strength, including the following composition (in weight percent) Cu 4.5 - 5.5, Mg 0.5 - 1.6, Mn <= 0.80, Zr <= 0.18, Cr <= 0.18, Si <= 0.15, Fe <= 0.15, the balance essentially aluminum and incidental elements and impurities, and wherein the amount (in weight %) of magnesium is either: (a) in a range of 1.0 to 1.6%, or alternatively (b) in a range of 0.50 to 1.2% when the amount of dispersoid forming elements such as Cr, Zr or Mn is controlled and (in weight %) in a range of 0.10 to 0.70%.

L'invention concerne un alliage AI-Cu des alliages de série AA2000 de grande dureté et de résistance améliorée. Cet alliage a la composition suivante (en pourcentages en poids) : Cu 4.5 - 5.5, Mg 0.5 - 1.6, Mn = 0.80, Zr = 0.18, Cr = 0.18, Si < 0.15, Fe = 0.15, le reste étant principalement de l'aluminium ainsi que des éléments incidents et des impuretés. La quantité ( % en poids) de magnésium est soit (a) dans une fourchette de 1.0 à 1.6 %, soit (b) dans une fourchette de 0.50 à 1.2 % lorsque la quantité d'éléments formant le dispersoïde est telle que Cr, Zr ou Mn est limité, dans une fourchette de 0.10 à 0.70 % ( % en poids).

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