ELMER EIFFLER
Engineers in Glenshaw, PA
License number
Pennsylvania PE001331K
Category
Engineers
Type
Professional Engineer
Address
Address
Glenshaw, PA 15116
Professional information
Method Of Treating A Coating On A Reactor Coolant Pump Sealing Surface
US Patent:
4978487, Dec 18, 1990
Filed:
Jan 13, 1989
Appl. No.:
7/296654
Inventors:
Elmer E. Eiffler - Glenshaw PA
Natraj C. Iyer - Monroeville PA
Alan T. Male - Murrysville PA
David J. Boes - Monroeville PA
Natraj C. Iyer - Monroeville PA
Alan T. Male - Murrysville PA
David J. Boes - Monroeville PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
B05D 312
US Classification:
264 60
Abstract:
An annular chromium carbide coating on an annular sealing surface of a stainless steel sealing assembly component for use in a nuclear reactor coolant pump, is treated by encasing at least the chromium carbide coating on the stainless steel sealing surface by applying a metallic cover thereover, evacuating the atmosphere between the cover and the coating on the sealing surface, hot isostatic pressing the stainless steel sealing assembly component and the chromium carbide coating thereon encased by the cover, cooling the sealing assembly component and the coating thereon encased by the cover, and after cooling thereof removing the cover from the coating. The result is a chromium carbide coating on the sealing component substrate densified substantially to its full theoretical density (greater than 99%) and metallurgically bonded by the hot isostatic pressing to the substrate exterior surface.