The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1977
Filed:
Apr. 29, 1976
Applicant:
Inventor:
Claudia J Burton, Clinton, NY (US);
Assignee:
Special Metals Corporation, New Hartford, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C22F / ;
U.S. Cl.
CPC ...
148-3 ; 75 1 / ; 75 82 ; 75170 ; 75171 ;
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.