Tungsten Carbide Rod Hard Facing

Tungsten Carbide Rod Hard Facing

A hard facing tungsten carbide rod is made by mixing particles of tungsten carbide, particles of a metal binder, and a temporary organic binder. Tungsten carbide rod hard facing relates to a rod of wear-resistant hard facing for application to wear or cutting surfaces such as teeth on bits for drilling oil wells or the like. The hard facing is applied by melting an end of the rod on the surface to be hard faced. The mixture is pressed, preferably by extrusion, into the form of a rod. The organic binder is removed and the rod is heated to a sufficient temperature to sinter the metal particles together without melting so that the rod has a residual porosity in the range of from 5 to 20%. Such a rod is used for hard facing a metal surface in lieu of conventional tube-rods. The technique permits a high proportion of tungsten carbide relative to the metal matrix and provides uniform distribution of carbide particles in the hard facing.


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