Nickel-based superalloys with high temperature stability

US5815792A · kind A · utility

Assignee

• Societe Nationale d'Etude et de Construction de Moteurs d'Aviation - S.N.E.C.M.A · FR

Inventors

• Catherine Dominique Béatrice Duquenne · Héricy, FR
• Jean Charles Henri Lautridou · Bondoufle, FR
• Michel Marty · Buc, FR
• Michele Soucail · Fontenay-aux-Roses, FR
• Andre Walder · L'Haÿ-les-Roses, FR

Key dates

• Filing date: Jul 30, 1996
• Grant date: Sep 29, 1998
• Expiry date: Jul 30, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C19/056
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A nickel-based superalloy possessing good mechanical properties when hot regarding traction, creep and cracking resistance has a chemical composition which comprises, in percentages by weight: Co 14.5 to 15.5 ; Cr 12 to 15 ; Mo 2 to 4.5 : Al 2.5 to 4; Ti 4 to 6; Hf not more than 0.5 ; C 100 to 300 ppm; B 100 to 500 ppm; Zr 200 to 700 ppm; possibly W up to 4.5; and nickel as the remainder. Components made from these alloys have an excellent microstructural stability when operating at temperatures up to 800.degree. C.