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Monocrystalline superalloy with nickel-base matrix, process for improving articles made from this alloy and articles obtained by this process

Assignee: Office National d'Études et de Recherches Aérospatiales
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Filing: 1982-03-31
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Granted: —
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Expires: 2002-03-31
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Abstract

Abstract Translated from French Superalliage monocristallin à matrice à base de nickel destiné notamment à la fabrication d'aubes de turbines, de composition pondérale suivante : Al 5,4 à 6,2% - Co 4 à 7% - Cr 6 à 9% - Mo 0 à 2,5% - Ta 5,5 à 8% - Ti 0 à 1% - W 7 à 9% - Ni complément à 100. L'invention fournit également un procédé pour améliorer la résistance au fluage d'une pièce en un tel superalliage monocristallin selon lequel, après chauffage de la pièce à la température de mise en solution complète de la phase γ' de type Ni3Al, on effectue la precipitation de la phase γ' dans la solution solide γ à une température supérieure à 1000°C. Un tel traitement confère au superalliage un accroissement important de sa résistance au fluage dans un large domaine de températures. Monocrystalline superalloy with a nickel-based matrix intended in particular for the manufacture of turbine blades, of the following weight composition: Al 5.4 to 6.2% - Co 4 to 7% - Cr 6 to 9% - Mo 0 to 2 , 5% - Ta 5.5 to 8% - Ti 0 to 1% - W 7 to 9% - Nor complement to 100. The invention also provides a method for improving the creep resistance of a part made of such a superalloy monocrystalline according to which, after heating the part to the temperature of complete dissolution of the phase γ 'of Ni3Al type, the precipitation of the phase γ' is carried out in the solid solution γ at a temperature above 1000 ° C. Such a treatment gives the superalloy a significant increase in its creep resistance over a wide range of temperatures.

Inventors

  • 👤 Tasadduq Khan
  • 👤 Pierre Caron

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 04:33
CPC Classifications
C; C30; C30B; C30B11/00; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/057; C30B29/00; C30B29/10; C30B29/52; C30B33/00

Claims Analysis

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References Cited (Backward Citations)

GB1011785A Cited
GB1260982A Cited
FR2392129A1 Cited

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