Recycling superalloy scrap by vapor phase zinc embrittlement

Details Recycling superalloy scrap by vapor phase zinc embrittlement Recycling superalloy scrap by vapor phase zinc embrittlement

1986-12-24

1988-01-12

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 82, 75 63, 241 23, C22B 700, B02C 2318

Patent

active

047189398

ABSTRACT:
A method of making superalloy scrap friable in order to allow greater recovery of metal values therein is disclosed whereby the scrap is treated with zinc vapor. After exposure to the zinc vapor, the metal scrap becomes friable so that it can be easily crushed. Thereafter, the metal values, particular of cobalt and nickel, can be easily recovered. The process can be made continuous by recovering and reusing the excess zinc vapor used in the treatment.

REFERENCES:
patent: 2354727 (1944-08-01), Wulff
patent: 3643873 (1972-02-01), George
patent: 3666437 (1972-05-01), Mehl et al.
patent: 3847594 (1974-11-01), Von Der Meulen et al.
patent: 4272463 (1981-06-01), Clark et al.
patent: 4273294 (1981-06-01), Hollely et al.

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