Method for making a composite grained cast article

Details Method for making a composite grained cast article Method for making a composite grained cast article

1980-04-21

1982-08-24

Dean, R.

Metal treatment

Compositions

Heat treating

148 115N, 148 32, 148 39, C22F 110

Patent

active

043459501

ABSTRACT:
A composite grained cast article is provided from a superalloy casting in the single grained condition, in one form, by mechanically working a portion of the article intended to operate at a lower temperature of up to about 1300.degree. F. The mechanically worked portion is then recrystallized by heating to provide a multi-grained portion. In another form, the multi-grained portion is provided by selective use of grain nucleation material during solidification.

REFERENCES:
patent: 3008855 (1961-11-01), Swenson
patent: 3413204 (1968-11-01), Rexer et al.
patent: 3494709 (1970-02-01), Piearcey
patent: 3572419 (1971-03-01), Barrow etal.
patent: 3967355 (1976-07-01), Giamei et al.
patent: 4184900 (1980-01-01), Erickson et al.

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