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SELECTIVE CASE DEPTH THERMO-MAGNETIC PROCESSING AND APPARATUS

United States Patent Application

20120091122
A1
View the Complete Application at the US Patent & Trademark Office
A method of altering characteristics of a workpiece comprising electrically conductive material includes exposing the workpiece to a magnetic field and exposing the workpiece to an induction field configured to cause heating current to flow through only a selected portion of the workpiece while the workpiece is exposed to the magnetic field. The induction field has a frequency such that the selected portion is less than the entire body of the workpiece or substantially only the outer surface of the workpiece. The method of altering characteristics of a workpiece may further include heating the entire body of the workpiece to a first temperature while the workpiece is exposed to the magnetic field and before exposing the workpiece to the induction field. The method of altering characteristics of a workpiece may further include quenching and tempering the workpiece in the magnetic field.
Ahmad, Aquil (W. Bloomfield, MI), Bogicevic, Alex (Wolverine Lake, MI)
Eaton Corporation (Cleveland OH)
12/ 904,698
October 14, 2010
FEDERAL FUNDING NOTICE [0001] Portions of the present disclosure were developed with federal funding supplied under Cooperative Research and Development Agreement (CRADA) No. NFE-08-01224 between Eaton Corporation and UT-Battelle, LLC. UT-Battelle, LLC operates and manages Oak Ridge National Laboratory for the United States Department of Energy. The Government has certain rights in this invention.