Preparation of single crystal superalloys for post-casting heat

Details Preparation of single crystal superalloys for post-casting heat Preparation of single crystal superalloys for post-casting heat

1983-12-27

1995-05-09

Lovering, Richard D.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

20412946, 117 3, C21D 602, C22F 110

Patent

active

054136482

ABSTRACT:
Unwanted recrystallization during heat treatment of a directionally solidified nickel alloy single crystal casting is prevented by chemical milling the part before heat treatment. Removal of a layer of as little as 0.013-0.050 mm thick, less than two percent of the part thickness, has been found effective.

REFERENCES:
patent: 3057764 (1962-10-01), La Boda et al.
patent: 3494709 (1970-02-01), Piearcey
patent: 3576070 (1971-04-01), Parsons
patent: 3873512 (1975-03-01), Latanision
patent: 4116723 (1978-09-01), Gell et al.
patent: 4209348 (1980-06-01), Duhl et al.
patent: 4345950 (1982-08-01), O'Hara

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