Abstract: A composition of material is disclosed which comprises sintered carbide-binder metal alloys. The carbide is a solid solution of hexagonal tungsten monocarbide and molybdenum monocarbide of stoichiometric composition containing between 10 and 100 mole percent molybdenum monocarbide. The binder is selected from the metals of the iron group, and comprises between 3 and 50 weight percent of the composition. A method for making the hexagonal carbide is also disclosed.

Abstract: A composite structure is disclosed which comprises a combination of heat treatable cemented carbides and alloy steel. The carbide phase in the cemented carbide is predominantly tungsten monocarbide, or solid solutions of tungsten monocarbide and molybdenum monocarbide, of stoichiometric composition. The binder in the cemented carbide is based on heat treatable low to medium alloy steel and contains less than 1.5 percent by weight vanadium and less than 8 percent by weight chromium. A method for making the cemented carbide is also disclosed. The composite structure is formed by integral casting in steel of the preformed cemented carbide. The composite structure can be heat treated to the desired hardness and toughness properties. The primary area of application of the composites of the invention are in digger teeth for earthmoving, in mining and ore-comminution tools, and in cutter heads for deep-well drilling.

Abstract: Refractory, hard carbide alloys, intended primarily as replacement for the cast eutectic WC + W.sub.2 C tungsten carbides currently used as hard components in wear-resistant facings, consist of fine-grained and hard two-phase mixtures of subcarbide, (Mo,W).sub.2 C, and hexagonal monocarbide (Mo,W)C, solid solutions, and are formed by solid state decomposition of the pseudocubic, .eta.-(Mo,W).sub.3 C.sub.2, or cubic .alpha.-(Mo,W)C.sub.1-x solid solutions. The carbide alloys of the invention can be combined with low-melting metal binders to form cemented carbide alloys of at least equivalent wear-resistance to alloys using the eutectic tungsten carbides.

Abstract: A composition of material is disclosed which comprises sintered carbide-binder metal alloys. The carbide is a solid solution of hexagonal tungsten monocarbide and molybdenum monocarbide of stoichiometric composition containing between 10 and 100 mole percent molybdenum monocarbide. The binder is selected from the metals of the iron group, and comprises between 3 and 50 weight percent of the composition. A method for making the hexagonal carbide is also disclosed.

Abstract: A composition of material comprising aluminum oxide and refractory transition metal diborides, with additions of magnesium oxide and, optionally, transition metal carbides, nitrides, carbonitrides and iron group metals for sintering and grain morphology control, is disclosed, which is particularly useful as a cutting tool for steels, cast iron, and hard to machine materials, such as superalloys. In contrast to the TiC-Al.sub.2 O.sub.3 cermets of the prior art which have to be hot pressed for optimum properties, a large portion of the cermets of the invention can also be fabricated, without detriment to performance, by sintering the cold pressed powder compacts in an inert furnace atmosphere at temperatures between 1650.degree. and 1820.degree. C.

Abstract: A composition of material is disclosed which comprises sintered carbonitride-binder metal alloys. The carbonitride has a gross composition falling within the area ABCD of FIG. 1, and within the additional concentration limits also specified in FIG. 1. The binder is selected from metals of the iron group and comprises between 3 and 20 weight percent of the composition.

Abstract: A composition of material is disclosed which is an alloy of a sintered carbonitride and a binder metal. The carbonitride alloys are based on selected compositions located within the spinodal range of the systems and having titanium and group VI metals M as its base metals and has a gross composition falling within the area ABDE of Figure 1. The binder is selected from metals of the iron group and metals of the group VI refractory transition metals and comprises between 5 and 45 weight percent of the composition.