Refining nickel base superalloys

Details Refining nickel base superalloys Refining nickel base superalloys

1976-04-29

1977-09-20

Dean, R.

Metal treatment

Compositions

Heat treating

75 10V, 75 82, 75170, 75171, C22F 110

Patent

active

040494705

ABSTRACT:
A process for producing a low iron nickel base superalloy having a very low selenium content. The process includes the steps of: preparing a superalloy melt containing, by weight, at least 60% nickel, no more than 1% iron, and more than 0.0004% selenium; maintaining the melt in contact with a calcium and/or magnesium bearing substance for a period of time sufficient to allow for reaction between selenium and calcium and/or magnesium, and a lowering of said melt's selenium content to a level below 0.0003%, said selenium removal being carried out in a substantially oxygen free atmosphere; casting the melt; and heat treating the cast metal.

REFERENCES:
patent: 3853540 (1974-12-01), Schlatter et al.
patent: 3891425 (1975-06-01), McCarty

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