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:
Jul. 09, 1996
Filed:
Apr. 26, 1994
Applicant:
Inventors:
Fred P Cone, Jupiter, FL (US);
Stephen V Prece, Palm Beach Gardens, FL (US);
Donn A Best, Alta Loma, CA (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; C22C / ; C21D / ;
U.S. Cl.
CPC ...
148336 ; 148328 ; 148419 ; 148707 ; 148649 ;
Abstract
A method of treating low-expansion Fe--Ni--Co superalloys is disclosed in which the alloys are forged at a temperature below the recrystallization temperature and then recrystallized without the use of intervening annealing steps. It is necessary that the warm forging step introduce sufficient strain throughout the Fe--Ni--Co superalloy such that after recrystallizing, the superalloy has a substantially uniform microstructure. Alloys produced by this method exhibit good hydrogen charging embrittlement resistance, good strength and/or rupture ductility in moist air.