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:
Oct. 22, 1991
Filed:
Jun. 09, 1989
Applicant:
Inventors:
Edward A Wanner, Leesport, PA (US);
Sunil Widge, Dryville, PA (US);
Assignee:
Carpenter Technology Corporation, Reading, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ; C22F / ;
U.S. Cl.
CPC ...
148 123 ; 148 / ; 148 / ; 148142 ; 148158 ; 148162 ; 148326 ; 148328 ; 148409 ; 148410 ; 148419 ;
Abstract
This invention provides a process for improving, to at least a predetermined level, the stress rupture life and/or stress rupture ductility of precipitation hardenable nickel and nickel-iron base alloys containing nickel, niobium, and silicon when said alloys have less than a predetermined level of these stress rupture properties when worked and aged by a primary heat treatment. This improvement in properties is accomplished by controlled precipitation of a sufficient quantity of a (Ni, Nb, Si)-containing intermetallic phase.