Abstract: A hard surfacing alloy which has a Rockwell C hardness of greater than about 50 and which includes tungsten carbide, chromium carbide and bi-metallic chromium and tungsten carbide crystals which are precipitated in the alloy. Alloys of the present invention in their nominal composition comprise from about 12% to about 20% tungsten; from about 13% to about 30% chromium; an effective amount of carbon for forming carbides with the tungsten and chromium and include effective amounts of fluxes and melting point depressants and the like. The balance of the composition is nickel. The alloys include precipitated carbide crystals of chromium, tungsten and bi-metallic mixtures thereof which are interspersed through the hard surfacing alloy and are metallurgically bonded in the metal matrix of the alloy. The alloys have extremely low porosities and therefore are suitable for glass plunger and other applications where low porosity is essential.

Abstract: An improved nickel-boron-silicon surfacing alloy containing an effective amount of phosphorous. Alloys of the present invention comprise: from about 0.20% to about 2.0% boron; from about 1.0% to about 5.0% silicon; and from about 0.5% to about 4.5% phosphorous, and contain a dendritic and two interdendritic phases.

Abstract: A novel corrosion inhibiting iron-free filler metal braze composition which has a nominal composition of: from about 5.0% to about 9.0% chromium; from about 3.5% to about 5.5% silicon; from about 2.0% to about 4.0% boron; from about 1.0% to about 6.0% copper; from about 1.0% to about 6.0% molybdenum; from about 1.0% to about 6.0% niobium, tantalum or mixtures thereof and the balance nickel.

Abstract: A hard surfacing alloy which has a Rockwell C hardness of greater than about 50 and which includes tungsten carbide, chromium carbide and bi-metallic chromium and tungsten carbide crystals which are precipitated in the alloy. Alloys of the present invention in their nominal composition comprise from about 12% to about 20% tungsten; from about 13% to about 30% chromium; an effective amount of carbon for forming carbides with the tungsten and chromium and include effective amounts of fluxes and melting point depressants and the like. The balance of the composition is nickel. The alloys include precipitated carbide crystals of chromium, tungsten and bi-metallic mixtures thereof which are interspersed through the hard surfacing alloy and are metallurgically bonded in the metal matrix of the alloy. The alloys have extremely low porosities and therefore are suitable for glass plunger and other applications where low porosity is essential.

Abstract: A composite article comprising a metallic substrate having an improved ductile wear and corrosion resistant surface coating thereon and metallurgically bonded thereto in which the coating comprises a nickel-chromium-tungsten base alloy matrix having uniformly dispersed therethrough a plurality of primary wear resistant particles such as tungsten carbide, for example, and secondary chromium and/or tungsten carbide crystals. The invention further encompasses the method of making the composite article by applying a particulated mixture of the metal alloy and primary wear resistant particles preferably by the Plasma Transferred Arc technique on the surface of a metallic substrate.