Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1989-01-13
1990-12-18
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264102, 264325, 427370, B05D 312
Patent
active
049784870
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.
REFERENCES:
patent: 4142888 (1979-03-01), Rozmus
patent: 4871297 (1989-10-01), Boes et al.
Boes David J.
Eiffler Elmer E.
Iyer Natraj C.
Male Alan T.
Fiorilla Christopher A.
Silbaugh Jan H.
Westinghouse Electric Corp.
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