Nickel-base superalloy

Details Nickel-base superalloy Nickel-base superalloy

C - Chemistry, Metallurgy

22

C

75/113

C22C 19/05 (2006.01)

Patent

CA 1093865

NICKEL-BASE SUPERALLOY ABSTRACT New nickel-base superalloys with good overall properties, the alloys being particularly adapted for high temperature applications at about 1800° F. to 2000° F., such as for turbine engine or other high temperature, high stress applications, and possessing a complex, multi-component gamma prime Ni3Al1 matrix (not necessarily in the exact 3:1 proportion) in which both the nickel and aluminum atoms are partially re- placed by, and/or containing, one or more of the following elements: Cr, Ti, Co, Mo and Ta. The nickel and aluminum may also be partially replaced by one or more of the following elements: W, C, Cb, Be, B, Zr and rare earths, such as for example, mischmetal. The gamma prime Ni3Al1 matrix phase pre- cipitates a delta Ni1Al1 phase (not necessarily in the exact 1:1 proportion) at elevated temperatures (termed herein "inverse precipitation") thus providing critical high temperature strengthening of the matrix. Additionally, the alloy structure may contain a quantity of carbides, some borides and some nitrides.

298775

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