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:
Apr. 21, 1998
Filed:
Jan. 30, 1996
Applicant:
Inventors:
Norman Pietruska, Durham, CT (US);
S Michael Kurpaska, Manchester, CT (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
148674 ; 148512 ; 148522 ; 148527 ;
Abstract
An improved method is described for restoring the mechanical properties to carbide-containing Co-based superalloy gas turbine components which have been exposed to high temperatures and pressures for extended periods of time. The method includes solution heat treating to 2250.degree.-2300.degree. F. for one to twelve hours to dissolve complex carbides, and aging at approximately 1965.degree.-1975.degree. F. for two to twenty four hours. The rejuvenated components exhibit excellent high temperature creep properties.