Abstract: An uncoated titanium-based carbonitride cutting tool insert with superior plastic deformation resistance and wear resistance is provided. This is accomplished by heat treating the material in nitrogen atmosphere under conditions to obtain a nitrogen rich surface zone, also containing substantial amounts of binder phase.

Abstract: There is now provided a cemented carbide grade for rock excavation purposes with 88-96 weight % WC, preferably 91-95% weight % WC, with a binder phase consisting of only cobalt or cobalt and nickel, with a maximum of 25% of the binder being Ni, possibly with small additions of rare earth metals, such as Ce and Y, up to a maximum of 2% of the total cemented carbide. The WC grains are rounded because of the process of coating the WC with cobalt, and not recrystallized or showing grain growth or very sharp cornered grains like conventionally milled WC, thus giving the bodies surprisingly high thermal conductivity. The average grain size should be from 8-30 .mu.m, preferably from 12-20 .mu.m. The maximum grain size does not exceed 2 times the average value and no more than 2% of the grains found in the structure are less than half of the average grain size.

Abstract: The invention concerns composites substantially consisting of: a cermet material having a binder metal phase of between 5 and 30 mass % and the remainder comprising at least one carbon nitride phase; or a hard metal with a hard material phase of between 70 and 100 %, the remainder being a binder metal phase, with the exception of a WC-Co hard metal, with up to 25 mass % cobalt as binder metal; or a powder-metallurgically produced steel. The invention further concerns a process for producing this composite. In order to improve bending strength and hardness, sintering is carried out in a microwave field.

Abstract: A cemented carbide drill/endmill blank and method of manufacture thereof wherein the drill/endmill includes a core and a surrounding tube with improved technological properties. The difference in Co-content between the core and tube is 1-10 wt-% units and the cubic carbide content is 8-20 wt-% in the tube and 0.5-2 wt-% in the core.

Abstract: The present invention relates to a cemented carbide with excellent properties for oil and gas applications including resistance to the combined erosion and corrosion synergistic effects at temperatures between -50 and 300.degree. C., preferably 0-100.degree. C. The cemented carbide contains, in wt %, 2.5-4.5 (Co+Ni) with a weight ratio Co/Ni of about 3, 0.25-0.6 Cr and 0.1 Mo wherein essentially all of the WC grains have a size <1 .mu.m and wherein the total carbon content is in the interval of 6.13-(0.061.+-.0.008).times.binder phase (Co+Ni) content (wt-%).

Abstract: Orthopaedic wires, cables, and methods of making them are based on the discovery that, in clinical orthopaedic applications, material toughness and fatigue strength are as important or more important than ultimate tensile strength. The wires and cables of the invention have a tensile strength lower than 280 ksi, but higher than 175 ksi. The presently preferred wires and cables have a tensile strength of 210-240 ksi. The fatigue strength of the wires and cables of the invention is between six and ten times that of other high strength cables used in orthopaedic applications. One method of making the wires and cables includes annealing high tensile strength wire or cable to reduce its tensile strength and thereby increase its fatigue strength. Another method is to cold work fully annealed wire or cable to the extent of decreasing its cross section by approximately 18%.

Abstract: A wear resistant coating for journals, journal sleeves and bushings on submerged rolls in a molten metal coating bath, comprising a laser-melted tungsten carbide containing overlay.

Abstract: A sintered hard material according to the invention comprises 0.02 to 0.10 wt % of one or more metals selected from the group consisting of Fe, Co and Ni, 0.3 to 3.0 wt % of one or more compounds selected from the group consisting of carbides, nitrides and carbonitrides of transition metals of the IVa, Va and VIa groups of the periodic table and a residue of tungsten carbide component having an average particle size of 0.5 .mu.m or less, the tungsten carbide component containing WC and W.sub.2 C in a proportion W.sub.2 C/(WC+W.sub.2 C) of between 0.01 and 0.15, the W.sub.2 C in the tungsten carbide component having a lattice constant reduced by 0.3 to 1.5 %.

Abstract: Cermets having a Co--Ni--Fe-binder are described. The Co--Ni--Fe-binder is unique in that even when subjected to plastic deformation, the binder substantially maintains its face centered cubic crystal structure and avoids stress and/or strain induced phase transformations. Stated differently, the Co--Ni--Fe-binder exhibits reduced work hardening.

Abstract: The present invention relates to a sintered body of titanium-based carbonitride alloy comprising hard constituents containing at least tungsten in addition to titanium in a binder phase based on cobalt. There are four distinctly different microstructural components, namely: A) cores which are remnants of and have a metal composition determined by the raw material powder; B) tungsten-rich cores formed during the sintering; C) outer rims with intermediate tungsten content formed during the sintering; and D) a binder phase of a solid solution of at least titanium and tungsten in cobalt. Toughness and wear resistance are varied by adding WC, (Ti,W)C, and/or (Ti,W)(C,N) in varying amounts as raw materials.

Abstract: A cutting insert that has a flank face and a rake face and a cutting edge at the juncture thereof. The substrate presents a bulk region that contains a metallic binder, as well as one or more of Group IVB, Group VB, and Group VIB metal carbides and/or carbonitrides. The substrate further includes a flank surface region near the flank face of the substrate that has a solid solution metal carbide and/or carbonitride content greater than that of the bulk region. The substrate includes a rake surface region near the rake face of the substrate with a solid solution metal carbide content that is less than that of the flank surface region.

Abstract: A titanium carbonitride-based alloy which is excellent in chipping resistance and wear resistance is disclosed. A hard phase is a carbide (TiMC), a nitride (TiMN) or a carbonitride (TiMCN) of Ti and at least one metal (M), other than Ti, selected from those belonging to the groups IVa, Va and VIa of the periodic table. A binder phase contains Co and Ni as main components. When the structure of the titanium-based alloy is observed with a scanning electron microscope, particles forming the hard phase in the alloy have black core parts which are located on core portions to appear black and peripheral parts which are located around the black core parts to appear gray. Assuming that A and B represent particles having the black core parts occupying areas of at least 30% of the overall particles A and those having the black core parts occupying areas of not more than 30% of the overall particles B respectively, the area ratio of the particles A to the particles B satisfies a condition of 0.3.ltoreq.A/(A+B).ltoreq.0.

Abstract: A sintered hard alloy for tools for cutting wood. The alloy according to the present invention comprises 30-98 volume % hard constituents in a binder phase based on nickel and/or cobalt. The hard constituents comprise oxides, carbides, nitrides and/or borides of Al, Zr, Si and/or Ti, preferably Al.sub.2 O.sub.3, ZrC, ZrO.sub.2, SiC, Si.sub.3 N.sub.4 and/or TiB.sub.2 with a mean grain size <1.5 .mu.m, preferably <1.0 .mu.m. The binder phase comprises in solution, in weight %, Co max 90, Ni max 90, Cr 5-45.

Abstract: A sintered body having diamond grains dispersed and held in a matrix of cemented carbide or cermet is obtained by direct resistance heating and pressurized sintering. The sintering is performed at a liquid phase generating temperature in a short time, so that the diamond grains are not directly bonded to each other. Thus, a superhard composite member that has excellent hardness and wear resistance can be obtained without employing an ultra high-pressure vessel.

Abstract: Double cemented carbide composites comprise a plurality of first regions and a second ductile phase that separate the first regions from each other. Each first region comprises a composite of grains and a first ductile phase bonding the grains. The grains are selected from the group of carbides consisting of W, Ti, Mo, Nb, V, Hf, Ta, and Cr carbides. The first ductile phase is selected from the group consisting of Co, Ni, Fe, alloys thereof, and alloys with materials selected from the group consisting of C, B, Cr, Si, and Mn. A preferred first region comprises tungsten carbide grains that are cemented with a cobalt first binder phase and which are in the form of substantially spherical pellets. The second ductile phase is selected from the group consisting of Co, Ni, Fe, W, Mo, Ti, Ta, V, Nb, alloys thereof, and alloys with materials selected from the group consisting of C, B, Cr, and Mn. A preferred second ductile phase is cobalt.

Abstract: A method for producing an atomized powder of chromium carbide particles dispersed in a nickel chromium matrix in which chromium in the powder is from 55 to 92 weight percent of the powder.

Abstract: There is now provided a cemented carbide button for rock drilling comprising a core and a surface zone surrounding the core whereby both the surface zone and the core contains WC (.alpha.-phase) and a binder phase based on at least one of cobalt, nickel or iron and that the core in addition contains .eta.-phase. In addition, in the inner part of the surface zone situated close to the core, the cobalt content is higher than the nominal content of cobalt and the cobalt content in the outermost part of the surface zone is lower than the nominal and increases in the direction towards the core, up to a maximum usually at the .eta.-phase core. The grain size distribution of the hard constituent in the zone with high cobalt content and in the .eta.-phase core is narrow in contrast to a button of the prior art in which the grain size distribution of the hard constituent in the zone with high cobalt content and the .eta.-phase core is wide.

Abstract: A cermet including a cermet core zone in which the content of a binder amounts to at most 90% by mass in relationship to a cermet hard phase is formed with a 0.01 to 3 um deep surface layer having an increased resistance to wear compare to the cermet core zone.

Abstract: A low melting point alloy is used to sinter metal carbide particles. The alloy is a eutectic-like alloy formed from a binding metal such as iron, cobalt or nickel, in combination with vanadium and chromium. The alloy is preferably formed by forming two separate alloys and blending these together. The first alloy is formed by spray drying together a solution of a binding metal salt such as a cobalt salt with a solution of a chromium salt. The formed particles are then carburized to form a cobalt-chromium-carbon alloy. A separate vanadium alloy is formed in the same manner. The two are combined to establish the amount of chromium and vanadium desired, and this, in turn, is used to sinter metal carbide parts. This permits sintering of the metal carbide parts at temperatures less than 1250.degree. C. and in turn significantly inhibits grain grown without a significant decrease in toughness. It is particularly adapted to form carbide products wherein the carbide grain size is as low as 120 nanometers.

Abstract: A coarse grained cemented carbide is produced by sintering a mixture of coarse grain carbide particles having an average particle size of at least 10 microns and a nickel binder in particulate form. The cemented carbide has particular use in the manufacture of a cutting element for a soft rock mining tool or road planing tool.

Abstract: The working surfaces of dental and surgical instruments are coated with a ceramic material formed by plasma spraying of a composition including a cemented carbide matrix and a ceramic dispersion to form a hardened surface with improved gripping ability. The cemented carbide matrix preferably contains tungsten and/or chromium carbide and/or cobalt. The ceramic dispersion preferably consists of alumina or other oxides.

Abstract: Methods for making, methods for using and articles comprising cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two regions exhibiting at least one property that differs are discussed. Preferably, the cermets further exhibit a portion that is binder rich and which gradually or smoothly transitions to at least a second region. The multiple-region cermets are particularly useful in compressively loaded application wherein a tensile stress or fatigue limit might otherwise be excessive for monolithic articles. The cermets are manufactured by juxtaposing and densifying at least two powder blends having different properties (e.g., differential carbide grain size, differential carbide chemistry, differential binder content, differential binder chemistry, or any combination of the preceding).

Abstract: A cemented tungsten carbide body having a transition metal binder phase selected from the group consisting of iron, nickel and cobalt is formed, wherein the WC grains have an average WC grain size of at most about 0.5 micrometer in diameter and a maximum WC grain size of at most about 0.8 micrometer in diameter. Also, about 50 percent by volume of the WC grains in the body are angular grains and the body (1) contains an amount of the transition metal ranging from about 3 percent to about 18 percent by weight of the body, (2) is essentially free of grain growth inhibitors and (3) is essentially pore free.

Abstract: The present invention provides a vane material having an excellent scuffing resistance in a compressor employing an alternative Freon gas as a cooling medium and a process for the preparation thereof. In accordance with the present invention, a vane material is provided having a structure comprising a base material consisting essentially of 1.0 to 4.5% by weight of carbon, not more than 1.5% by weight of silicon, not more than 1.0% by weight of manganese, 3 to 6% by weight of chromium, not more than 30% of tungsten and/or not more than 20% by weight of molybdenum provided that (W+2Mo) is not more than 45% by weight, 2 to 10% by weight of vanadium and/or niobium, not more than 20% by weight of cobalt, and a balance of iron and inavoidable impurities with additive particles of a carbide and additive particles of a nitride and/or a carbonitride, sintered thereto in an amount of more than 0% to not more than 25% by weight and 2 to 25% by weight based on the total weight of the vane material, respectively.

Abstract: A resilient and corrosion and wear resistant component of tooling preferably used in the deep-drawing of aluminum and steel cans is disclosed. The tooling is comprised of a distinctive nickel-bonded cemented carbide having a density less than 13 grams per cubic centimeter, a hardness of at least 88 R.sub.a, a minimum transverse rupture strength of 250,000 p.s.i. and exhibiting essentially non-magnetic behavior. Preferred compositions for the material of the tooling are also given.

Abstract: The present invention relates to a cemented carbide insert, comprising a cemented carbide substrate and a coating. The substrate contains WC and cubic carbonitride phase in a binder phase based of Co and/or Ni and has a binder phase enriched surface zone essentially free of cubic phase. The binder phase enriched surface zone prevails over the edge. As a result, an insert according to the invention has improved edge toughness and resistance against plastic deformation and is particularly useful for machining of sticky work piece materials such as stainless steel.

Abstract: According to the present invention there is provided a wear resistant vane for alternate flow that is appropriate for a rotary compressor that employs HFC flow as an alternate refrigerant, and which vane possesses: a reciprocal or opposed characteristic in that it does not cause to wear a piston to which it contacts and nevertheless causes little wear to itself; a preferable corrosion resistance; and an ensured reliability, in that when employed for an operation that continues for an extended period of time there is no possibility of a surface layer suddenly peeling off.

Abstract: The object of the present invention is to provide a non-magnetic or feebly magnetic diamond sintered compact available for a magnetic article or magnetic material. This object can be achieved by a non-magnetic or feebly magnetic diamond sintered compact whose magnetic susceptibility is at most 3% of Fe, consisting of a high hardness sintered compact comprising at least 50 volume % of diamond with a grain size of 0.1 to 100 .mu.m and a binder phase containing a metallic component selected from the group consisting of ferromagnetic iron group metals such as Ni, Co, Fe, etc. and mixtures thereof, in which at least one of feebly magnetic metal components each having a magnetic susceptibility of at most 5.times.10.sup.-8 (emu/g), for example, Cr, V, Cu, Si, Zn, Al Mo, W, etc.

Abstract: A method of making a coated member comprising the steps of: providing a sintered substrate that includes hard grains bonded together by metallic binder; removing material from the sintered substrate to form an as-ground substrate; reducing the residual stresses in the substrate; resintering the substrate to form a resintered substrate; and adherently depositing a coating on the resintered substrate.

Abstract: In order to improve the toughness characteristics of a cermet alloy, while retaining high resistance to wear, a composition is disclosed which contains 30 to 60% by weight of Ti, 5 to 20% by weight of W, 5 to 15% by weight of Ta, in which up to 70% of the Ta can be replaced by Nb, and 5 to 25% by weight of Ni and/or Co binder with more than 80 mole %, relative to the above transition elements of carbon and nitrogen. The composition is prepared by grinding, compressing and sintering a solid, powder-form mixture containing (Ti,W,Ta,Nb)C powder, Ti(C,N) powder, and WC powder, each powder having a particle size <1.5 .mu.m, plus Ni powder and/or Co powder. The mixture includes the following ingredients: (a) (Ti,W,Ta,Nb)C with a mean particle size <1.5 .mu.m, this mixed carbide containing 20 to 50% by weight of TiC, 20 to 40% by weight of WC, and 20 to 40% by weight of (Ta, Nb)C; (b) Ti(C,N), with a mean particle size <1.5 .mu.m and an N/(C+N) ratio <0.7; WC with a mean particle size <1.5 .mu.

Abstract: A hardfacing composition comprises at least 60% by weight of hard metal granules including a quantity of sintered carbide pellets and a quantity of cast carbide pellets. The cast and sintered carbides are selected from the group of carbides consisting of chromium, molybdenum, niobium, tantalum, titanium, tungsten, and vanadium carbides and alloys and mixtures thereof. The balance of the hardfacing composition is matrix metal with traces of flux or deoxidizer, and alloying elements. All percentages given are pre-application ratios.

Abstract: The present invention relates to a method of producing a sintered body comprising one or more hard constituents and a binder phase based on cobalt, nickel and/or iron by powder metallurgical methods milling, pressing and sintering of powders. At least part of the binderphase powder consists of non-agglomerated particles of spheroidal morphology having dimensions of 0.1 to 20 .mu.m.

Abstract: The present invention relates to a sintered titanium-based carbonitride alloy for milling and turning where the hard constituents are based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W 3-25% binder phase based on Co and/or Ni. the alloy is characterized in that the bottom of the crater caused by the crater wear on an insert used in milling and turning contain grooves with a mutual distance between their peaks of 40-100 .mu.m, preferably 50-80 .mu.m, and where the main part, preferably >75% of the grooves have a depth of >12 .mu.m, preferably >15 .mu.m.

Abstract: This invention consists of two parts: "Cemented Carbide with Minimal Amount of Binder Metal", and "Nonmagnetic cemented Carbide".The "Cemented Carbide with Minimal Amount of Binder Metal" is for cemented carbide bodies which are made from less than 2% binder metal powder and more than two kinds of metal carbide powder. Neither kind of carbide powder exceeds 98% of all the carbide powder used as raw material. The raw powder is to be prepared following a conventional powder metallurgy method--especially the conventional method of making cemented carbide--milling, cold pressing and non-high-pressure sintering. During the sintering process, metal carbide powder forms complicated solid solution carbides, and the small amount of binder which initially helped sintering is lost for the most part, if not entirely, during sintering.The "Non-magnetic Cemented Carbide" is cemented carbides which have nickel-tungsten alloy as a binder metal. The process of manufacturing uses said conventional powder metallurgy.

Abstract: This invention relates to submicron carbonitride powders of titanium and, optionally, other transition metals of the fifth (Me.sup.(5)) and sixth (Me.sup.(6)) secondary group of the periodic system of elements which have the following general molar composition: (Ti.sub.L Me.sub.M.sup.(5) Me.sup.(6).sub.1-L-M) (C.sub.1-y N.sub.y).sub.z with 0.50.ltoreq.L.ltoreq.1; 0.ltoreq.m.ltoreq.0.15; 0.ltoreq.(1-L-M).ltoreq.0.50; 0.10.ltoreq.y.ltoreq.0.95 and z.gtoreq.0.90, to a process for the production of these powders and to their use.

Abstract: There is now provided a sintered titanium-based carbonitride alloy for metal cutting containing hard constituents based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and 3-30% binder phase based on Co and/or Ni. The structure contains well-dispersed and/or as agglomerates, 10-50% by volume hard constituent grains essentially without core-rim structure with a mean grain size of 0.8-5 .mu.m in a more fine-grained matrix with a mean grain size of the hard constituents of <1 .mu.m. The matrix is made from a powder being prepared from an intermetallic pre-alloy disintegrated to <50 .mu.m particle size and then carbonitrided in situ to extremely fine-grained hard constituents having a diameter .ltoreq.0.1 .mu.m within the binder phase metals.

Abstract: This invention provides a cermet alloy having a structure comprising a hard phase and a bonding phase, wherein the hard phase comprising carbide particles rich An TiC, those rich in WC and (Ti, W, MO)C or (Ti, W, Mo)(C, N) and the bonding phase comprising at least one of Co and Ni. Mo contents in the bonding phase satisfies the conditions: 1.0.ltoreq.Mo (wt %)/Ti (wt %) and 6 (wt %).ltoreq.Ti+Mo. The cermet alloy has superior hardness and toughness as well as improved heat resistance and is applicable as a material for a wet machining tool.

Abstract: There is provided a sintered titanium-based carbonitride alloy for metal cutting containing hard constituents based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and 3-30% binder phase based on Co and/or Ni. The structure contains 10-50% by weight well-dispersed Ti-rich hard constituent grains essentially without core-rim structure with a mean grain size of 0.8-5 .mu.m in a conventional carbonitride alloy matrix with a mean grain size of the hard constituents of 1-2 .mu.m. The Ti-rich hard constituent grains are essentially rounded, non-angular grains with an approximately logarithmic normal grain size distribution with a standard deviation of <0.23 logarithmic .mu.m.

Abstract: A cermet sintered body excellent in wear resistance, oxidation resistance and toughness, which is suitable for cutting tools. The cermet sintered body includes: a hard dispersion phase in an amount of from 70 to 95 wt. %, which contains TiC and/or Ti(C, N) and carbides (excluding TiC) and/or nitrides of one or more kinds selected from a group consisting of elements in IVa, Va, and VIa groups of the periodic system, and a binder phase in an amount of from 5 to 30 wt. %, which contains one kind or two or more kinds of iron family elements. Moreover, the average particle size of a raw powder of TiC and/or Ti(C, N) is in the range of 1.0 .mu.m or less, and TiC and/or Ti(C, N) are directly dissolved in a solid state in the carbides (excluding TiC) and/or nitrides during sintering, to form a hard dispersion phase. The hard dispersion phase thus obtained mainly contains solid-solutions without any structure having a core, and which has a uniform distribution of composition.

Abstract: A method for forming a sintered hard metal composite is provided in which unsintered nodules of a pre-blended hard metal powder of a first grade are uniformly dispersed into unsintered nodules of a pre-blended hard metal composite of a second grade. The pre-blended hard metal powders form a composite powder blend which is subsequently pressed and sintered to form the dispersion alloyed hard metal composite. A sufficient amount of pressing lubricant is provided to one of the pre-blended hard metal powders so that each of the hard metal powders shrinks at approximately the same rate relative to the application of pressure during the compacting process. The pressing lubricant is added to that hard metal powder which shrinks more during sintering.

Abstract: The present invention relates to a sintered titanium-based carbonitride alloy for milling and turning where the hard constituents are based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and the binder phase based on Co and/or Ni. The structure comprises 10-50% by volume hard constituent grains with core-rim-structure with a mean grain size for the cores of 2-8 .mu.m in a more fine-grained matrix with a mean grain size of the hard constituents of <1 .mu.m and where said mean grain size of the coarse hard constituents grains is >1.5 .mu.m, preferably >2 .mu.m, larger than the mean grain size for the grains in the matrix. The coarse grains can be Ti(C,N), (Ti,Ta)C, (Ti,Ta)(C,N) and/or (Ti,Ta,V)(C,N).

Abstract: Disclosed is a hard alloy with high hardness, high abrasion resistance, high corrosion resistance and high rigidity, which is excellent in performance in use for tools. The hard alloy contains more than 80% by weight of WC with less than 2 .mu.m of average particle size, more than 0.2% by weight and less than 2% by weight of Co and the remaining part of one or more metals, carbides, nitrides and carbonitrides of the metals in the IVa, Va and VIa families in the periodic table, such as 2.0 to 7.0% by weight of one or more of Mo and Mo.sub.2 C, and the alloy contains Co.sub.x W.sub.y C.sub.z in the sintered product. By the addition of Mo or Mo.sub.2 C and VC the growth of particles in the hard phase is inhibited and at the same time the wettability of WC--Co is increased.

Abstract: Disclosed are a hard sintered alloy having fine pores which comprises a sintered alloy comprising 2 to 30% by volume of a dispersed phase of at least one of oxide, carbide and sulfide of Ca, Sr or Ba and mutual solid solutions of these, and the balance of a binder phase comprising at least one metal of Co, Ni and Fe or an alloy containing said metal as a main component and a hard phase of at least one of carbide, nitride and boride of the 4a (Ti, Zr, Hf), 5a (V, Nb, Ta) or 6a (Cr, Mo, W) group metal of the periodic table and mutual solid solutions of these, with a volume ratio of said binder phase to said hard phase being 2:98 to 95:5, wherein fine pores are formed by removing said dispersed phase from a surface portion of said sintered alloy, and a process for preparing the same.

Abstract: Method of making sintered insert for milling and turning formed of a titanium-based carbonitride containing hard constituents and binder phase metal comprising milling at least one hard constituent with binder phase metal, adding a second hard constituent at a later time during milling, pressing and sintering the pressed constituents to form the insert.

Abstract: A hard sintered component of a cemented carbide or a stellite alloy having a complex three-dimensional shape and a small hole or the like and the high strength originally provided by the used material for making the component without any secondary working, is formed by injection molding a compact molding die having an inner mold surface roughness R.sub.max of not more than 3 .mu.m. Where a core pin is used the outer surface of the pin has a surface roughness R.sub.max of not more than 3 .mu.m. The compact is then sintered. The hard sintered component is composed of a cemented carbide or a stellite alloy. In such a hard sintered component, the surface of a complex three-dimensional shape such as a disc portion or a thin portion, or the inner surface of a small hole, is defined by a sintered surface which has a surface roughness R.sub.max of not more than 4 .mu.m.

Abstract: There now exists a sintered titanium-based carbonitride alloy containing hard constituents with core-rim structure based on, besides Ti, W, one or more of the metals Zr, Hf, V, Mo, Nb, Ta or Cr in 5-30 weight % binder phase based on Co and/or Ni with simultaneously increased wear resistance and toughness. The alloy is characterized in that at least 70%, preferably at least 80%, of said hard constituents have four different types of cores with the following contents of Ti and W in weight % of the total metal content: 1-5 W and 90-95 Ti (1A), 15-25 W and 65-85 Ti (1B), 50-75 W and 20-40 Ti (1C), as well as 20-30 W and 30-60 Ti (2A), whereby the amount of each type is at least 5%.

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 article made of an ultra fine grained cemented carbide material and a process for making the same.

Abstract: A hardfacing composition comprises at least 60% by weight of hard metal granules including a quantity of sintered carbide pellets and a quantity of cast carbide pellets. The cast and sintered carbides are selected from the group of carbides consisting of chromium, molybdenum, niobium, tantalum, titanium, tungsten, and vanadium carbides and alloys and mixtures thereof. The balance of the hardfacing composition is matrix metal with traces of flux or deoxidizer, and alloying elements. All percentages given are pre-application ratios.

Abstract: The present invention relates to a sintered body for chip forming machining containing at least one hard constituent comprising a carbide, nitride and/or carbonitride of a metal of group IVB, VB or VIB in the periodical system and a binder metal based upon Co, No and/or Fe, in which the body comprises a core containing eta-phase or an intermediate phase, substantially free of carbon and/or nitrogen surrounded by a hard constituent- and binder phase-containing surface zone, free of said eta-phase or intermediate phase.