Matches 151 - 200 out of 293 < 1 2 3 4 5 6 >
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4588552 Process for the manufacture of a workpiece from a creep-resistant alloy  
Manufacture of a workpiece from a creep-resistant nickel superalloy which is hardened by means of an oxide dispersion, by a powder-metallurgical process in which the mechanically alloyed powder is...
4587096 Canless method for hot working gas atomized powders  
A canless method for hot working a nickel-base gas atomized alloy powder. The powder is blended with nickel powder, consolidated and sintered to a sufficient green strength. The surface of the...
4585619 Method of producing high speed steel products metallurgically  
The invention relates to a powder metallurgical method for producing high speed steel products, the shape of which is close to the desired final shape of the product, i.e. according to the so...
4584169 Process, apparatus and installation for the continuous production of a filler wire  
In the installation, a strip is shaped from a split tube which is welded or seamed to give a closed tube in a welding or seaming station. Associated with the welding or seaming station is a suction...
4582679 Titanium nitride dispersion strengthened alloys  
To increase the creep strength of a titanium-containing alloy which also contains chromium, the alloy powder is heated in the presence of ammonia at a temperature of the order of 700° C. so as to...
4582680 Multiphase backing materials for piezoelectric broadband transducers  
An acoustical transducer is provided with an acoustically absorbant backing material having an acoustical impedance precisely matching the impedance of the piezoelectric element in the transducer....
4568384 Method for making Ag/Pd electroding powder  
Pure silver and palladium powders are thoroughly mixed and dispersed by ball milling in a solution of a surfactant in a liquid vehicle. After drying and granulating, the resulting powder was heated...
4560621 Porous metallic bodies  
Porous metallic bodies having a substantially uniform pore size of less than about 200 microns and a density of less than about 25 percent theoretical, as well as the method for making them, are...
4547336 Method for the manufacture of piston ring inserts by a powder metallurgy technique  
A method for the manufacture of piston ring inserts by a powder metallurgy technique from austenitic ferrous alloys with an equivalent carbon content of more than 2%, said method comprising the...
4519839 Sintered high vanadium high speed steel and method of making same  
A sintered high vanadium high speed steel with an excellent hardness and ductility of composition C 1.4-6.2%, W+2 Mo (W-equivalent) 10.0-24.0%, Cr 3.0-6.0%, V 8.5-28%, Co less than 17%, the...
4515864 Solid metal articles from built up splat particles  
Apparatus for the production of a metal article comprises means for maintaining a reservoir of molten metal with a free surface, means for rotating the free surface of the reservoir about an axis...
4495148 Process and apparatus for removing combustible lubricants from sinterable workpieces  
Workpieces pressed from metallic particles, impregnated with an organic lubricant, are sintered in a muffle furnace after traversing a preheating chamber serving for the removal of the lubricant. A...
4483819 Production of highly capacitive agglomerated valve metal powder and valve metal electrodes for the production of electrolytic capacitors  
A process for the production of agglomerated valve metal powder which comprises heating an admixture of a valve metal powder and a reducing agent in the presence of an inert gas or under high...
4462845 Oxygen-free dispersion-strengthened copper and process for making same  
Substantially completely deoxidized, consolidated dispersion-strengthened copper stock of sizable cross section and particulates capable of being thus consolidated into such stock are shown. The...
4450135 Method of making electrical contacts  
A method of preparing electrical contacts and electrical contact materials comprises the steps of blending a conductive metallic component, such as silver, with nickel and zirconium diboride which...
4448606 Molybdenum-tungsten based alloys containing hafnium carbide  
A powder metallurgical alloy which comprises a solid solution of molybdenum and from about 10 to about 98 percent by weight tungsten has a dispersed phase of hafnium carbide. The alloy is prepared...
4435213 Method for producing aluminum powder alloy products having improved strength properties  
Aluminum alloy atomized or other powder is compacted and shaped into a useful article including heating the compact rapidly by induction heating techniques. Such rapid induction heating results in...
4423004 Treatment of tantalum powder  
Tantalum powder for electrolytic capacitors is treated with a non-aqueous solution of ammonium thiocyanate in N,N'-dimethylformamide or N-methylpyrrolidinone after the powder has been subjected to...
4415527 Desulfurization process for ferrous powder  
A method for producing a low carbon ferrous powder melt stock with a sulfur content of less than 5 parts per million is disclosed comprising the steps of atomizing molten steel into a powder,...
4414028 Method of and apparatus for sintering a mass of particles with a powdery mold  
A particulate mass to be sintered is imbedded in a mold which comprises a porous mass of particulate refractory material enclosed within a flexible membrane. Six press units are provided for...
4402737 Method of producing tungsten and tungsten carbide powder  
A uniform, large size tungsten powder having properties which make it suitable for producing large size tungsten carbide powder is produced by doping a tungsten oxide starting powder with a lithium...
4402905 Production of a polycrystalline silicon aluminum alloy by a hot pressing technique  
The present invention is directed to a process for preparing a body of polycrystalline silicon doped with aluminum comprising melting a mixture of silicon powder and aluminum powder, rapidly...
4379003 Magnetic devices by selective reduction of oxides  
Magnetic material is made by reducing an oxide powder compact having at least one nonreducible oxide species. A typical mixture of nickel, iron, and aluminum oxides selectively reduces to form a...
4344905 Gas lasers  
A cathode electrode for a gas discharge laser comprises a block of platinum black compressed into a solid mass.
4310354 Process for producing a shape memory effect alloy having a desired transition temperature  
A process for producing a shape memory effect alloy having a desired transition temperature. The process includes the steps of: providing at least one prealloyed powder of a shape memory effect...
4306901 Process for forming steel product from iron while avoiding the liquid state  
Steel is made from iron ore by comminuting the ore and recovering a particle fraction which has a size less than 50 microns. The iron rich particles then are reduced to form iron or magnetite and...
4284431 Method for the production of sintered powder ferrous metal preform  
A method for the production of sintered powder metal preform employing a novel reduction step. As-water-atomized ferrous metal particles are coated by phenol resins by adding said phenol resins to...
4260418 Method for producing molybdenum bearing ferrochromium  
An improved method for producing a low carbon, low nitrogen ferrochromium containing molybdenum. The method comprises the steps of blending particles of high carbon ferrochromium and particles of...
4252577 Method and apparatus for treating metal scrap cuttings  
Metal scrap cuttings are prepared for use in making sintered pieces. The cuttings are physically and chemically cleaned, ground in an inert atmosphere, heat treated in a reducing atmosphere, and...
4238221 Process for preparing iron based powder for powder metallurgical manufacturing of precision components  
A process for manufacturing iron-based powder to be used for powder metallurgical manufacturing of precision components having good accuracy to size and high strength. In accordance with the...
4222798 Method of manufacturing ferromagnetic metal powder  
A method of manufacturing a ferromagnetic metal powder by continuously drying and subsequently heat treating a slurry of ferromagnetic metal powder formed by wet reduction, characterized in that a...
4221614 Method of manufacturing ferromagnetic magnetic metal powder  
A method of manufacturing a ferromagnetic metal powder characterized by continuously drying a slurry of ferromagnetic metal powder formed by wet reduction, in a non-oxidizing gas atmosphere, and...
4216009 Method of making alloy and carbide powders of molybdenum and tungsten  
The present invention relates to a process for the production of an alloy powder (Mo, W) for powder metallurgy, which comprises chemically or mechanically mixing molybdenum and tungsten in the form...
4205986 Process for fabricating steel from ferrous metal particles  
A process for conditioning ferruous particles with heat and a reducing atmosphere to reduce the oxygen content of the particles in a non-agglomerative manner and to make the conditioned particles...
4174983 Fe-Cr-Co magnetic alloy processing  
A method is disclosed for making a metallic body having desirable magnetic properties. The metallic body is made from an alloy which contains Fe, Cr, and Co and which may also contain one or...
4141719 Tantalum metal powder  
Improved, high-purity agglomerated tantalum powders having an exceptional combination of a relatively low oxygen content, high green strength when pressed into compacts without using any binders,...
4141727 Electrical contact material and method of making the same  
An electrical contact material comprising silver, bismuth oxide and tin oxide with or without tin metal, wherein the amounts of the bismuth and the tin on the basis of the sum weight of the metals...
4115623 Porous material for making tool-electrode and method of producing same  
The porous material adapted for making a tool-electrode therefrom features the porosity up to 15 - 25 percent of its volume, pore size within 10 to 40 microns and oxygen content up to 0.1 wt.%. The...
4104061 Powder metallurgy  
The invention relates to an improved method of removing gaseous or volatile contaminants from metal powders or porous compacts thereof wherein the powder or compact is subjected to a procedure...
4101348 Process for preparing hot-pressed sintered alloys  
Aluminum-silicon-iron alloys exhibiting an excellent combination of properties are disclosed. The process for preparing these alloys is also disclosed. In this process an aluminum-silicon-iron...
4062679 Embrittlement-resistant tantalum wire  
Tantalum and tantalum-rich alloys, particularly in wire form, are stabilized against embrittlement by the addition of 50 to 700 parts per million of silicon and optionally with the further addition...
4017302 Tantalum metal powder  
Improved, high-purity agglomerated tantalum powders characterized by exceptionally high green strength when pressed without using a carbonaceous binder into low density anodes and high electrical...
4008104 Method for dephosphorization and denitrification of an alloy containing easily oxidizable components  
Cr alloy, Mn alloy or Mo alloy can be dephosphorized and denitrified simultaneously with a flux newly prepared. The flux comprises metallic Ca, Mg, Ba or Sr and halides thereof. There is no loss of...
3976482 Method of making prealloyed thermoplastic powder and consolidated article  
The invention is directed to a process for improving workability of prealloyed powders, particularly those of the superalloy type, in which powder is cold reduced by subjecting it to the...
3975193 Powder metallurgy process for producing stainless steel stock  
A powder metallurgy process for producing stainless steel stock. The process utilizes readily available, inexpensive, oxygen- and carbon-bearing raw materials and yields stainless steel stock of...
3954461 Process for the production of low apparent density water atomized steel powders  
The apparent density of molding-grade, water atomized steel powder can be significantly decreased by employing the following prescribed treatment. Coarse particles are removed in order that at...
3954458 Degassing powder metallurgical products  
This invention relates to a method of degassing prealloyed aluminum powder or compacts formed therefrom wherein the metal products are degassed by being subjected to a temperature between 450° and...
3923496 Nickel powder and a process for producing it  
1. The method of producing nickel powder which comprises reacting oxalic acid with aqueous nickel nitrate to produce nickel oxalate, heating the nickel oxalate in an atmosphere of carbon dioxide at...
3907546 Molybdenum flame spray powder and process  
The bulk density of a flame spray powder of agglomerates of finely divided molybdenum or molybdenum alloy particles is increased by adding from 0.1 to 0.5 weight percent of finely divided nickel...
3900309 Process for the production of high apparent density water atomized steel powders  
The apparent density of molding-grade, water atomized steel powder can be significantly increased by employing the following prescribed treatment. Coarse particles are removed in order that at...
Matches 151 - 200 out of 293 < 1 2 3 4 5 6 >