Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2006-10-18
2010-06-22
King, Roy (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
C148S410000, C420S448000
Reexamination Certificate
active
07740724
ABSTRACT:
A method for preventing the formation of cellular gamma prime in nickel-based superalloys comprises the steps of: casting a nickel-based superalloy into a desired article; subjecting the cast article to hot isostatic pressing at a temperature in excess of 2000° F. at a pressure greater than 15,000 psi to close internal pores in the cast article; and avoiding any formation of the cellular gamma prime in the cast article.
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I. Koizumi and M. Nishihara, Isostatic pressing, technology and applications, Elsevier Science Publishers Ltd., 1992, pp. 152-161, XP002469451, ISBN 1-85166-596-X.
Bachman & LaPointe P.C.
King Roy
Roe Jessee R.
United Technologies Corporation
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