Patents by Inventor Stephen V. Prece

Stephen V. Prece has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Low temperature forging process for Fe-Ni-Co low expansion alloys and product thereof
    Patent number: 5534085
    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.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: July 9, 1996
    Assignee: United Technologies Corporation
    Inventors: Fred P. Cone, Stephen V. Prece, Donn A. Best