Heat treatment of superalloy components

Details Heat treatment of superalloy components Heat treatment of superalloy components

2011-03-01

2011-03-01

King, Roy (Department: 1733)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S562000, C228S119000, C029S889700

Reexamination Certificate

active

07896986

ABSTRACT:
An improved method of heat treating superalloys prior to welding includes subjecting only the portion of the component to be repaired to a localized heat treatment, leaving the remainder of the component untreated. The localized heat treatment permits the use of higher hold temperatures that are near, at, or above the Ni3(Al,Ti) solution temperature of the alloy. Such heat treatment prevents strain age cracking and also prevents recrystallization in areas that are not heat treated. Such localized heat treatment can be applied before and/or after welding, for material rejuvenation, pre-brazing, and post-brazing.

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David A Deantonio et al., “Heat Treating of Superalloys” ASM Handbook, vol. 4, pp. 793-814, 1995.

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