Method for producing a nickel-base superalloy

Details Method for producing a nickel-base superalloy Method for producing a nickel-base superalloy

1989-09-27

1992-07-21

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

420448, 148410, 148428, 148556, C22F 110

Patent

active

051319616

ABSTRACT:
A method of forming a Ni-base superalloy suitable for use as the material for gas turbine disks or the like has a composition containing, by weight, 0.01 to 0.15% of C, 15 to 22% of Cr, 3 to 6% of Mo, 3 to 6% of W, 5 to 15% of Co, 1.0 to 1.9% of Al, 1.5 to 3.0% of Ti, 3.0 to 6.0% of Ta, 0.001 to 0.020% of B and the balance substantially Ni except inevitable impurities. This alloy is produced using the conventional ingot making and a hot working process including working at a reducing ratio greater than or equal to 10%, first above the .gamma. solvus temperature, and then during cooling to the recrystallization temperature and then subjected to direct aging without solid-solution treatment. As a result, the alloy exhibits excellent strength properties well comparable to those of expensive alloys produced by powder metallurgy process.

REFERENCES:
patent: 4039330 (1977-08-01), Shaw
patent: 4769087 (1988-09-01), Genereux et al.

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