Patent ID: 6200524
Filing Date: 2001-03-13
Classification: B22F,F16J

Abstract:
A method of manufacturing of a mechanical face seal, said seal configured as an iron based alloy substrate provided with an annular groove filled with a wear resistant material comprising at least one refractory metal carbide and a binder, said method comprising the steps:a) filling the annular groove formed in the substrate with a powdered mixture comprising a refractory metal carbide and a metal binder,b) applying a first external pressure to said powdered mixture to produce a compacted bulk portion within the annular groove,c) placing additional metal binder powder onto the upper surface of the compacted bulk portion to form an upper layer of the powdered metal binder,d) applying a second external pressure to said upper layer and said compacted bulk portion to produce an integral green body,e) heating said substrate and said integral green body in neutral or reducing atmosphere at a temperature sufficient to induce infiltration and diffusion of the metal binder from the upper layer into the compacted bulk portion, said heating resulting in consolidation of the integral green body and reliable adhesion thereof to the substrate.