Abstract: A matrix powder that includes (a) about 15 weight percent of ?325 Mesh cast tungsten carbide particles; (b) about 2 weight percent ?325 Mesh particles comprising one or more of iron particles and nickel particles; (c) about 2 weight percent +60 Mesh macrocrystalline tungsten carbide particles; (d) about 6 weight percent ?60+80 Mesh macrocrystalline tungsten carbide particles; and (e) about 75 weight percent ?80+325 Mesh hard particles. A portion of component (e) forms between about 10 weight percent and about 20 weight percent of the matrix powder. The portion of component (e) that is crushed cemented tungsten carbide particles containing one or more of cobalt and nickel within one of the following particle size ranges: (i) ?80+120 Mesh hard particles; (ii) ?120+170 Mesh hard particles; (iii) ?170+230 Mesh hard particles; (iv) ?230+325 Mesh hard particles; (v) ?325 Mesh hard particles. The balance of component (e) is macrocrystalline tungsten carbide particles.

Abstract: A matrix powder that includes (a) about 15 weight percent of ?325 Mesh cast tungsten carbide particles; (b) about 2 weight percent ?325 Mesh particles comprising one or more of iron particles and nickel particles; (c) about 2 weight percent +60 Mesh macrocrystalline tungsten carbide particles; (d) about 6 weight percent ?60+80 Mesh macrocrystalline tungsten carbide particles; and (e) about 75 weight percent ?80+325 Mesh hard particles. A portion of component (e) forms between about 10 weight percent and about 20 weight percent of the matrix powder. The portion of component (e) that is crushed cemented tungsten carbide particles containing one or more of cobalt and nickel within one of the following particle size ranges: (i) ?80+120 Mesh hard particles; (ii) ?120+170 Mesh hard particles; (iii) ?170+230 Mesh hard particles; (iv) ?230+325 Mesh hard particles; (v) ?325 Mesh hard particles. The balance of component (e) is macrocrystalline tungsten carbide particles.

Abstract: A matrix powder for formation along with an infiltrant into a matrix for use as a wear element or for use in retaining at least one discrete hard element. The matrix powder includes crushed sintered cemented tungsten carbide particles. The composition of the crushed sintered cemented tungsten carbide comprises between about 6 weight percent and about 13 weight percent binder metal and between about 87 weight percent and about 94 weight percent tungsten carbide.

Abstract: A matrix powder for formation along with an infiltrant into a matrix for use as a wear element or for use in retaining at least one discrete hard element. The matrix powder including macrocrystalline tungsten carbide particles, crushed sintered cemented macrocrystalline tungsten carbide particles, tungsten carbide, and an iron-based component.

Abstract: A matrix powder for formation along with an infiltrant into a matrix for use as a wear element or for use in retaining at least one discrete hard element. The matrix powder including macrocrystalline tungsten carbide particles, crushed sintered cemented macrocrystalline tungsten carbide particles, tungsten carbide, and an iron-based component.

Abstract: A spray powder for thermal spraying onto a substrate to provide a hardfacing, and a part with such hardfacing on the surface thereof, that is corrosion-resistant and abrasion-resistant. The spray powder comprises between about 75 to about 90 weight percent of tungsten carbide. The powder further comprises between about 10 and 25 weight percent of a nickel-based alloy, which includes Mo, and optionally, includes one or more of Fe, C, Cr, Mn, Co, Si and W.

Abstract: A molten blend of an alkali metal halide containing tungsten is treated with solid particulate carbonaceous reactants, such as natural flake graphite. Tungsten monocarbide is produced having a large percentage of relatively coarse crystals. The crystal morphology is blocky or thick bladed with some equant forms and the carbon is present in the correct stoichiometric amount of 6.13% by weight, thus eliminating any need for carbon additions prior to sintering.

Abstract: In the alumino-thermit method of producing tungsten monocarbide powders, metallic iron is added to the reaction charge in quantities to control the calculated reaction temperature within the range of about 4372.degree. to about 4500.degree. F. It has been found that this process can now be controlled to produce macrocrystalline tungsten carbide powders which are very low in Ti, Ta and Nb content and have a very narrow range of total carbon contents.