Abstract: A polycrystalline diamond construction has a body of polycrystalline diamond (PCD) material; and a cemented carbide substrate bonded to the body of polycrystalline material along an interface. The cemented carbide substrate has tungsten carbide particles bonded together by a binder material, the binder material comprising Co; and the tungsten carbide particles form at least around 70 weight percent and at most around 95 weight percent of the substrate. The cemented carbide substrate has a bulk volume, the bulk volume of the cemented carbide substrate having at least around 0.1 vol. % of inclusions of free carbon having a largest average size in any one or more dimensions of less than around 40 microns.

Abstract: A polycrystalline diamond construction has a body of polycrystalline diamond (PCD) material; and a cemented carbide substrate bonded to the body of polycrystalline material along an interface. The cemented carbide substrate includes tungsten carbide particles bonded together by a binder material, the binder material comprising an alloy of Co, Ni and Cr; and the tungsten carbide particles form at least around 70 weight percent and at most around 95 weight percent of the substrate. The cemented carbide substrate has a bulk volume, the bulk volume of the cemented carbide substrate has at least around 0.1 vol. % of inclusions of free carbon having a largest average size in any one or more dimensions of less than around 40 microns.

Abstract: Polycrystalline material comprising a plurality of nano-grains of a crystalline phase of an iron group element and a plurality of crystalline grains of material including carbon (C) or nitrogen (N); each nano-grain having a mean size less than 10 nanometres.

Abstract: This disclosure relates to a method of producing a tool comprising a substrate and a hard-face coating metallurgically bonded to the substrate. The method comprises the steps of: providing a steel substrate; providing a composition of fully sintered granulate grains; and then applying the fully sintered granulate grains onto the substrate. The resultant cemented carbide material on the steel substrate comprises a specific composition and includes a metastable phase having a nanohardness of at least 12 GPa and a Palmqvist fracture toughness of below 7 MPa m½. The method includes heat-treating the hard-face coating to at least partially decompose the metastable phase, to increase the Palmqvist fracture toughness.

Abstract: A cemented carbide material comprises WC, between around 3 to around 10 wt. % Co and between around 0.5 to around 8 wt. % Re. The equivalent total carbon (ETC) content of the cemented carbide material with respect to WC is between around 6.3 wt. % to around 6.9 wt. % and the cemented carbide material is substantially free of eta-phase and free carbon. There is also disclosed a method of producing such a material and use of such a material.

Abstract: A cemented carbide body is provided with improved resistance to mechanical fatigue. The cemented carbide body comprises tantalum in the binder matrix material. The tantalum content is between 1.5 weight per cent and 3.5 weight per cent of the binder content.

Abstract: A method of fabricating a cemented carbide article by additive manufacturing, and a granular material are disclosed. A precursor material is provided that comprises granules, the granules comprising carbide grains and a binder comprising any of cobalt, nickel and iron. Each granule has a density of at least 99.5% of the theoretical density and the granules of the precursor material have a mean compressive strength of at least 40 megapascals (MPa). An additive manufacturing process is used to manufacture the article by building up successive layers of material derived from the precursor material.

Abstract: A method for coating a body includes providing a plurality of granules in which each granule includes silicon (Si), carbon (C), chromium (Cr) and an iron group metal. The relative quantities of the Si, C and Cr are such that a molten phase will form at a melting temperature of less than 1,300 degrees Celsius when a threshold quantity of the iron group metal is accessible to the Si, C and Cr. A second source of the iron group metal is also provided. A combination of the granules and the second source is formed such that the threshold quantity of the iron group metal will be accessible to the Si, C and Cr. The granules and the second source are heated to the melting temperature to form the molten phase in contact with the body. The heat is then removed to allow the molten phase to solidify.

Abstract: A cemented carbide material comprises WC, between around 3 to around 10 wt. % Co and between around 0.5 to around 8 wt. % Re. The equivalent total carbon (ETC) content of the cemented carbide material with respect to WC is between around 6.3 wt. % to around 6.9 wt. % and the cemented carbide material is substantially free of eta-phase and free carbon. There is also disclosed a method of producing such a material and use of such a material.

Abstract: A cemented carbide body is provided with improved resistance to mechanical fatigue. The cemented carbide body comprises tantalum in the binder matrix material. The tantalum content is between 1.5 weight per cent and 3.5 weight per cent of the binder content.

Abstract: A cemented carbide material comprising tungsten carbide grains, the content of tungsten carbide in the cemented carbide material being at least 75 weight percent and at most 95 weight percent. The cemented carbide material comprises a binder phase comprising any of cobalt, iron, or nickel, and nanoparticles. The nanoparticles include material according to the formula CoxWyCz, where x is a value in the range from 1 to 7, y is a value in the range from 1 to 10 and z is a value in the range from 0 to 4. The nanoparticles have a mean grain size of no more than 10 nm and at least 10 percent of the nanoparticles have a size of at most 5 nm. The volume percent of the tungsten carbide grains having a grain size of no more than 1 ?m is less than 4 percent. A method for producing the cemented carbide material is also disclosed.

Abstract: A method of fabricating a cemented carbide article by additive manufacturing, and a granular material are disclosed. A precursor material is provided that comprises granules, the granules comprising carbide grains and a binder comprising any of cobalt, nickel and iron. Each granule has a density of at least 99.5% of the theoretical density and the granules of the precursor material have a mean compressive strength of at least 40 megapascals (MPa). An additive manufacturing process is used to manufacture the article by building up successive layers of material derived from the precursor material.

Abstract: A cemented carbide material comprising tungsten carbide grains, the content of tungsten carbide in the cemented carbide material being at least 75 weight percent and at most 95 weight percent. The cemented carbide material comprises a binder phase comprising any of cobalt, iron, or nickel, and nanoparticles. Te nanoparticles include material according to the formula CoxWyCz, where x is a value in the range from 1 to 7, y is a value in the range from 1 to 10 and z is a value in the range from 0 to 4. The nanoparticles have a mean grain size of no more than 10 nm and at least 10 percent of the nanoparticles have a size of at most 5 nm. The volume percent of the tungsten carbide grains having a grain size of no more than 1 ?m is less than 4 percent. A method for producing the cemented carbide material is also disclosed.

Abstract: A polycrystalline diamond composite compact element comprises a body of polycrystalline diamond material and a cemented carbide substrate bonded to the body of polycrystalline material. The cemented carbide substrate has tungsten carbide particles bonded together by a binder material comprising an alloy of Co, Ni and Cr. The tungsten carbide particles form between 70 weight percent and 95 weight percent of the substrate. The binder material comprises between about 10 to 50 wt. % Ni, between about 0.1 to 10 wt. % Cr, and the remainder weight percent comprising Co. The size distribution of the tungsten carbide particles in the substrate has fewer than 17 percent of the carbide particles with a grain size of equal to or less than about 0.3 microns, between about 20 to 28 percent of the tungsten carbide particles having a grain size of between about 0.3 to 0.5 microns; between about 42 to 56 percent of the tungsten carbide particles having a grain size of between about 0.

Abstract: A method and granules for coating a body. Each granule comprises silicon (Si), carbon (C), chromium (Cr) and iron group metal selected from iron (Fe), cobalt (Co) and nickel (Ni). The relative quantities of the Si, C and Cr are such that a molten phase comprising the Si, C, Cr and the iron group metal will form at a melting temperature of less than 1,300 degrees Celsius when at least a threshold quantity of the iron group metal is accessible to the Si, C and Cr; but each granule comprising substantially less than the threshold quantity of the iron group metal. A second source of the iron group metal is provided. A combination of the granules and the second source is formed such that at least the threshold quantity of the iron group metal will be accessible to the Si, C and Cr. The granules and the second source are heated to at least the melting temperature to form the molten phase in contact with the body. The heat is then removed to allow the molten phase to solidify and to provide the coated body.

Abstract: Cemented carbide material comprising tungsten carbide (WC) material in particulate form having a mean grain size D in terms of equivalent circle diameter of at least 0.5 microns and at most 10 microns, and a binder phase comprising cobalt (Co) of at least 5 weight per cent and at most 12 weight per cent, W being present in the binder at a content of at least 10 weight per cent of the binder material; the content of the WC material being at least 75 weight per cent and at most 95 weight per cent; and nanoparticles dispersed in the binder material, the nanoparticles comprising material according to the formula CoxWyCz, where X is a value in the range from 1 to 7, Y is a value in the range from 1 to 10 and Z is a value in the range from 0 to 4; the nanoparticles having a mean particle size at most 10 nm, at least 10 per cent of the nanoparticles having size of at most 5 nm; the cemented carbide material having a magnetic coercive force in the units kA/m of at least ?2.1XD+14.

Abstract: The present invention relates to a cemented carbide article comprising a core of metal carbide grains and a binder selected from cobalt, nickel, iron and alloys containing one or more of these metals and a surface layer defining an outer surface for the article, the surface layer comprising 5 to 25 weight percent of tungsten and 0.1 to 5 weight percent carbon, the balance of the surface layer comprising a metal or alloy selected from the binder metals and alloys and the surface layer being substantially free of carbide grains as determined by optical microscopy or SEM. A method for the production of a cemented carbide article is also provided.

Abstract: A cemented carbide material comprises WC, between around 3 to around 10 wt. % Co and between around 0.5 to around 8 wt. % Re. The equivalent total carbon (ETC) content of the cemented carbide material with respect to WC is between around 6.3 wt. % to around 6.9 wt. % and the cemented carbide material is substantially free of eta-phase and free carbon. There is also disclosed a method of producing such a material and use of such a material.

Abstract: Cemented carbide material comprising tungsten carbide (WC) material in particulate form having a mean grain size D in terms of equivalent circle diameter of at least 0.5 microns and at most 10 microns, and a binder phase comprising cobalt (Co) of at least 5 weight per cent and at most 12 weight per cent, W being present in the binder at a content of at least 10 weight per cent of the binder material; the content of the WC material being at least 75 weight per cent and at most 95 weight per cent; and nanoparticles dispersed in the binder material, the nanoparticles comprising material according to the formula CoxWyCz, where X is a value in the range from 1 to 7, Y is a value in the range from 1 to 10 and Z is a value in the range from 0 to 4; the nanoparticles having a mean particle size at most 10 nm, at least 10 per cent of the nanoparticles having size of at most 5 nm; the cemented carbide material having a magnetic coercive force in the units kA/m of at least ?2.1×D+14.

Abstract: Polycrystalline material comprising a plurality of nano-grains of a crystalline phase of an iron group element and a plurality of crystalline grains of material including carbon (C) or nitrogen (N); each nano-grain having a mean size less than 10 nanometres.