Nickel base superalloy turbine disk

Details Nickel base superalloy turbine disk Nickel base superalloy turbine disk

2005-12-13

2005-12-13

Sheehan, John P (Department: 1742)

Metal treatment

Stock

Nickel base

C420S447000, C420S448000, C420S449000, C420S450000, C415S200000, C416S22300B, C416S24100B

Reexamination Certificate

active

06974508

ABSTRACT:
A low solvus, high refractory alloy having unusually versatile processing mechanical property capabilities for advanced disks and rotors in gas turbine engines. The nickel base superalloy has a composition consisting essentially of, in weight percent, 3.0–4.0 Al, 0.02–0.04 B, 0.02–0.05 C, 12.0–14.0 Cr, 19.0–22.0 Co, 2.0–3.5 Mo, greater than 1.0 to 2.1 Nb, 1.3 to 2.1 Ta, 3.0–4.0 Ti, 4.1 to 5.0 W, 0.03–0.06 Zr, and balance essentially Ni aid incidental impurities. The superalloy combines ease of processing with high temperature capabilities to be suitable for use in various turbine engine disk, impeller, and shaft applications. The Co and Cr levels of the superalloy can provide low solvus temperature for high processing versatility. The W, Mo, Ta, and Nb refractory element levels of the superalloy can provide sustained strength, creep, and dwell crack growth resistance at high temperatures.

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“High Temperature Turbine Disk Program,” Phase 5 Final Report, May 15, 2001, pp. 1-19.

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