Abstract: A workpiece of alloy steel is produced by sintering under a nonoxidizing atmosphere a mass of malleable-iron powder admixed with a comminuted complex ferroalloy. The latter, obtained from a molten mixture of several simple high-carbon ferroalloys saturated with graphite, is a blend of at least three nonferrous metals and iron in carbide form, including a complex carbide of formula M.sub.7 C.sub.3 containing iron and manganese with the possible addition of chromium and another carbide of formula M'.sub.2 C/M'C containing molybdenum with the possible addition of vanadium and/or niobium. The carbidically bound carbon amounts to at least 4%, by weight, of the ferroalloy composition and may constitute between 10% and 60% of the carbon of the sinterable powder mixture to which elemental carbon may be added as graphite. As the mass of iron and ferroalloy particles compacted under high pressure is sintered at temperatures between about 1150.degree. and 1300.degree. C.

Abstract: The present invention concerns a method for producing a metal from crude platinum or one of its alloys, comprising very fine particles, in dispersed phase form, of at least one refractory oxide, in the proportion of 0.1 to 0.5% by weight with respect to the weight of the said metal, wherein the molten host metallic material containing the said oxide is sprayed on a target by means of a device delivering a jet of pressurized gas.

Abstract: A composition for compressing and sintering to produce high-wear resistant articles essentially includes between 2% and 10% by weight, preferably 5% by weight, basalt powder and the remainder being metallurgical powder. The metallurgical powder is preferably comprised of austenite steel powder of high commercial quality and the basalt powder is a commercial quality basalt. The article of manufacture is for an internal combustion engine supplied with lead-free fuel wherein the article is comprised of compressed and sintered metal powder having the entire resulting pore space filled with basalt. The article takes the form of a cylinder liner, a valve seat and/or a valve-seat ring.

Abstract: An alloy steel is provided along with a method of making the same. The alloy is heat, wear, corrosion and oxidation resistant, and is preferably made utilizing powder metallurgy techniques. The method involves the addition of carbon and silicon to an iron base alloy containing chromium to improve the properties of the steel.

Abstract: A chlorine source is provided in a reactor in combination with a ground oxidized ore and a particulate carbonaceous reductant. The amount of chlorine provided is significantly less than the stoichiometric requirements for reaction with the total iron content of the ore; the amount of the reductant is greater than that required to effect the reduction of the total iron content of the ore. The reactor is operative to retain the reaction gases in intimate contact with the feedstock mixture without significant dilution of said gases in order to provide a reducing atmosphere. The mixture is indirectly heated to a temperature below 950.degree. C., preferably in the range 700.degree.-950.degree. C., and the mixture is retained in the reactor for a period of time sufficient to cause the major portion of the iron to be transported out of the ore and to be deposited on or near the solid reductant and form discrete metal particles.

Abstract: An ink composition for deposition upon the surface of a semiconductor device to provide a contact area for connection to external circuitry is disclosed, the composition comprising an ink system containing a metal powder, a binder and vehicle, and a metal frit. The ink is screened onto the semiconductor surface in the desired pattern and is heated to a temperature sufficient to cause the metal frit to become liquid. The metal frit dissolves some of the metal powder and densifies the structure by transporting the dissolved metal powder in a liquid sintering process. The sintering process typically may be carried out in any type of atmosphere. A small amount of dopant or semiconductor material may be added to the ink systems to achieve particular results if desired.

Abstract: A flame spray powder mix is provided for producing coatings on metal substrates, such as substrates of steel, cast iron, non-ferrous metals, among other substrates, the powder mix comprising agglomerates of a metallo-thermic heat generating composition (i.e., a thermit composition, such as an alumino-thermic composition) mixed with at least one coating material, such as metal and/or non-metal coating materials.

Abstract: An article and a method of producing molded electrical magnetic components from amorphous metal segments is provided by compacting the segments.

Abstract: A boron-containing nickel or cobalt spray-and-fuse self-fluxing alloy powder contains hard precipitates of chromium boride and, optionally, chromium carbide which are internally precipitated from a melt of said alloy. Such alloy powder is made by atomizing the melt at about the temperature at which the melt is viscous.

Abstract: A flame spray powder mix is provided for producing metal coatings on metal substrates, such as ferrous metal substrates, e.g. steel, cast iron, among other metal substrates, the powder mix comprising agglomerates of at least one metal silicide, e.g. titanium disilicide, homogeneously mixed with a coating metal powder, such as nickel powder. The mix may additionally contain agglomerates of silicon powder with the coating metal powder making up the major portion of the powder mix.

Abstract: A flame spray powder mix is provided for producing metal coatings on metal substrates, such as ferrous metal substrates, e.g., steel, cast iron, among other metal substrates, the powder mix comprising agglomerates of silicon and at least one metal disilicide, e.g., titanium disilicide, homogeneously mixed or blended with a coating metal powder, such as nickel powder.

Abstract: A flame spray powder mix or blend is provided for producing metal coatings on metal substrates, such as ferrous metal substrates, e.g., steel, cast iron, among other metal substrates, the powder mix comprising agglomerates of at least one oxidizable metal, e.g., aluminum, homogeneously mixed or blended with a coating metal powder, such as nickel powder. The coating produced is characterized by a strong bond and also being substantially low in dispersed oxides.

Abstract: A flame spray powder mix is provided for producing metal coatings on metal substrates, such as ferrous metal substrates, e.g., steel, case iron, among other metal substrates, the powder mix comprising particles of at least one metal silicide, e.g., titanium disilicide, mixed with a coating metal powder, such as nickel powder. The amount of metal silicide in the powder mix preferably ranging from about 2% to 20% by weight.

Abstract: An iron modifier containing, percent by weight;______________________________________ Silicon 25 to 50 Rare-earth metals 20 to 40 Carbon 10 to 30 Sulphur 0.1 to 0.3 Iron the balance, ______________________________________the components being added into liquid iron in the form of a mixture of alloys and foundry coke in the following proportions, percent by weight: ______________________________________ silico-mishmetal 70 to 90 foundry coke 10 to 30; ______________________________________and this mixture is introduced in an amount of from 0.3 to 0.5% by weight.The modifier according to the present invention makes it possible to produce thin-walled iron castings without the formation of cementite on the surface thereof.

Abstract: A process for producing balls of cobalt containing tungsten carbide, the process comprising forming droplets of a liquid mixture comprising: particles of tungsten carbide; guar gum; a dissolved cobalt salt; and a non-ionic wetting agent; contacting the droplets for not more than 1 hour with a base to precipitate a cobalt species, thereby forming droplets of a gel precipitate, placing the droplets of the gel precipitate in a vessel having a thermal conductivity not exceeding 100 cal/sec/cm.sup.2, and heating the vessel in a reducing atmosphere to remove the guar gum and to sinter the tungsten carbide and cobalt, thereby forming sintered balls of cobalt containing tungsten carbide.

Abstract: A powder metal composition containing 1.0-2.5% Ni, 0.3-0.7% Mo, 0.15-0.30% Mn, 0.5-1.5% Cu, 0.3-0.7% C, 0.50-1.0% zinc stearate, the balance being Fe.

Abstract: An infiltrating powder composition for infiltrating porous iron compacts comprises a copper powder mixture containing a minor amount iron powder, copper-maganese alloy powder, stainless steel powder, refractory metal oxide, and aluminum powder.

Abstract: A powdered metal filter composition and processes for producing the same by water atomization in which the composition exhibits an apparent density, compressibility and particle shape as a function of the composition chemistry and in particular the silicon, carbon and manganese content as well as the angle of intersection of the atomizing water jets; the composition providing an optimization of filtration efficiency, pressure drop across the filter pack, resistance to pressure deformation of the composition particles and the useful life of both the filter pack and the composition and the process producing such a composition with well-known apparatus and optimum yields of useful, particle-size fractions.

Abstract: The production of highly porous sintered bodies useful for the manufacture of electrolytic capacitors by using as a lubricant for the base metal powder, usually tantalum, about 0.01 to about 10% by weight of an inorganic lubricant, particularly a sulfide, selenide or telluride of a metal of subgroup V or VI of the Periodic Table or nitrides of boron or silicon.

Abstract: Plasma spray powders of molybdenum particles containing at least 0.5 weight percent oxygen and obtained by reacting molybdenum particles with oxygen or oxides in a plasma, form plasma spray coatings exhibiting hardnesses comparable to flame sprayed coatings formed from molybdenum wire and plasma coatings of molybdenum powder containing hardening alloy powders. Such oxygen rich molybdenum powders may be used to form wear resistant coatings, such as for piston rings.

Abstract: Discrete pressure-rupturable microcapsules for lubrication in powder metallurgy are disclosed comprising a core and a solid shell surrounding said core; the core comprises an organic liquid lubricant able to wet powdered metals, the shell comprises a thin non-atmospherically degradable polymeric material; the microcapsules may be used as the sole lubricant in the manufacture of sintered metal parts or may be used in admixture with unencapsulated solid lubricants to produce synergistic free-flowing compositions; there are also provided novel compositions of matter for forming sintered metal components comprising a mixture of sinterable, powdered metal and the microcapsules.

Abstract: Plasma deposition welding powder for the production of a wear-resistant coating on machine parts subject to friction consists essentially of a mixture of two components A and B, of which component A is present at 70 to 99.5 weight percent of the total of A and B. Component A comprises at least one metal selected from the group consisting of molybdenum and tungsten. Component B is present at 0.5 to 30 weight percent of the total of A and B and consists essentially of at least one alloy or compound of at least one of the metals selected from the group consisting of cobalt, chromium, iron, nickel, copper and manganese, with at least one of the elements selected from the group consisting of phosphorus, boron and silicon.

Abstract: A phosphorus steel powder for manufacturing sintered details having an extremely small tendency to brittleness ruptures consists of iron or steel powder substantially free from phosphorus, mixed with a phosphorus powder characterized by a maximum particle size of 20 .mu.m, preferably a maximum particle size of 10 .mu.m. The phosphorus content of the ferrophosphorus powder shall exceed 2.8% and in order to reduce the wearing of the tools the phosphorus content shall be less than 17%. If the ferrophosphorus powder is manufactured by grinding piece goods the phosphorus content shall exceed 12% and shall preferably be between 14 and 16%. The phosphorus content of the preferred mixture is between 0.2 and 1.5%. The iron-ferrophosphorus mixture is heated with or without the addition of oil in reducing atmosphere to a temperature of between 650.degree. and 900.degree. C for a period of 15 minutes to 2 hours to improve the protection against segregation.

Abstract: A phosphorus steel powder for manufacturing sintered details having an extremely small tendency to brittleness ruptures consists of iron or steel powder substantially free from phosphorus, mixed with a phosphorus powder containing in all less than 4% impurities which are at the sintering temperature more easily oxidized than the main components iron and phosphorus. The iron-ferrophosphorus mixture is heated with or without the addition of oil in reducing atmosphere to a temperature of between 65.degree. and 900.degree. C for a period of 15 minutes to 2 hours to improve the protection against segregation.

Abstract: Columbium powder capable of producing anodes of improved electrical capacitance is prepared by the addition of phosphorus-containing materials in amounts from about 5 to about 600 ppm based on elemental phosphorus.

Abstract: Tungsten carbide-cobalt agglomerated flame spray powder is produced by spray drying a slurry of particles in an aqueous cobalt nitrate solution. The agglomerates are classified according to size and the out-of-size agglomerates are recycled. The classified agglomerates are heated in flowing hydrogen, to reduce the nitrate to cobalt metal, and then sintered to strengthen the agglomerates for subsequent flame spraying.

Abstract: An improved abradable coating particularly useful to control clearances between relatively moving members in a sealing relationship includes a base portion and an abradable coating portion which is the fusion and interaction product of a mechanical mixture of a plurality of powdered materials comprising a nickel-graphite powder and an aluminum-copper base alloy powder.

Abstract: A flame spray material in the form of a composite comprising (1) as a first component an alloy containing at least about 40% of its weight of at least one of nickel and cobalt, and about 1 to 6% by weight of boron, and (2) aluminum powder as a second component, the first component being present in about 66 to 99% by weight of the composite. The material, desirably blended with about 10% of an aluminum-molybdenum-coated nickel core powder, produces self-bonded wear resistant coatings which can be ground without cracking.