公开(公告)号：CA2007687A1

公开(公告)日：1990-07-13

申请号：CA2007687

申请日：1990-01-12

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： EIFFLER ELMER E ,  IYER NATRAJ C ,  MALE ALAN T ,  BOES DAVID J

IPC: G21D1/04 ,  B22F3/12 ,  B22F7/04 ,  C23C4/18 ,  C23C24/08 ,  B05D3/12 ,  B05D7/14 ,  F04D29/08

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 it full theoretical density (greater than 99%) and metallurgically bonded by the hot isostatic pressing to the substrate exterior surface.