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5028386 |
Process for the production of tools
In a process for making tools from medium and high alloy steels or stellites by superplastic precision forming a powder metallurgically produced starting material with an equiaxed structure and...
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5026680 |
Method of manufacturing a powder of bi-based superconductive oxide containing lead and method of manufacturing a sintered body therefrom
A Ca carbonate powder, a Sr carbonate powder, and a Cu oxide powder are mixed in predetermined proportions, and sintered at a first predetermined temperature into a Ca-Sr-Cu--O oxide sintered body....
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5017217 |
Ceramic/metal or ceramic/ceramic composite article
A method for manufacturing ceramic/metal or ceramic/ceramic composite articles is disclosed. The articles can be useful for the production of aluminum in fused salt electrolysis cells, as armor...
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5015440 |
Refractory aluminides
Light weight refractory aluminides, such as Al 3 Nb and related aluminides may be produced from metallic powders by a high temperature exothermic reaction of refractory metals with molten...
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5011655 |
Process of forming a composite structure
The invention provides a method of manufacturing a thin metallic body composite structure. First, an inner layer of a first metal is cleaned to remove oxides and promote metallurgical bonding. The...
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4981512 |
Methods are producing composite materials of metal matrix containing tungsten grain
A composite material comprising a metal matrix containing tungsten grain is roduced from tungsten powders formed by plasma rapid solidification. The powders comprise tungsten and up to 20 weight...
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4971756 |
Method for producing dies for use in compacting permanent magnet alloy powders
Producing a die for use in compacting permanent magnet alloy powder by placing a quantity of a magnetic or nonmagnetic alloy, which may be stainless steel, cobalt- or nickel-base, or a magnetic or...
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4961902 |
Method of manufacturing a ceramic/metal or ceramic/ceramic composite article
A method for manufacturing ceramic/metal or ceramic/ceramic composite articles is disclosed. The articles can be useful for the production of aluminum in fused salt electrolysis cells, as armour...
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4955798 |
Process for pretreating metal in preparation for compacting operations
A pretreating process in powder metallurgy for preparing powders for compacting or densifying operations includes the steps of mixing powder metals with solid lubricants and optionally with liquid...
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4941918 |
Sintered magnesium-based composite material and process for preparing same
A magnesium-based composite material having improved mechanical strength, and in particular an improved modulus of elasticity, and a relatively low density. The material is provided by pressing and...
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4940404 |
Method of making a high velocity armor penetrator
A method of making a tungsten tantalum material comprising generally 80 percent by weight tungsten and 20 percent by weight tantalum and forming the material into a high strength full density round...
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4933140 |
Electrical heating of graphite grain employed in consolidation of objects
A method of consolidating a body in any of initially powdered, sintered, fibrous, sponge, or other form capable of compaction, including the steps: providing a bed of flowable particles within a...
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4931252 |
Process for reducing the disparities in mechanical values of tungsten-nickel-iron alloys
A process for reducing disparities of mechanical properties in tungsten-nickel-iron alloys containing in % by weight 85 to 99% of tunsten, 1 to 10% of iron, the alloys being obtained from tungsten,...
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4909841 |
Method of making dimensionally reproducible compacts
A process of hot pressing of materials to form articles or compacts is characterized by the steps: (A) providing a compactable particulate mixture; (B) uniaxially pressing the particles without...
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4886636 |
Method of controlling the pore morphology of strengthened silver powder compacts
In the manufacture of a porous silver structure made by pressing and sintering silver powder prepared by ion substitution process, porosity of the structure is increased by heat treating the silver...
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4874430 |
Composite silver base electrical contact material
A silver base electrical contact material is described which contains a dispersion of particles consisting of cadmium oxide and nickel. The nickel particles are surrounded by a continuous adherent...
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4857267 |
Aluminum base bearing alloy and method of producing same
The invention provides an aluminum base bearing alloy which is excellent in both lubricating capability and fatigue resistance and is useful, e.g. in automotive engines. The bearing alloy consists...
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4836979 |
Manufacture of composite structures
A method of producing a composite material from a mixture of copper and a low coefficient of thermal expansion nickel-iron alloy (Invar) powder is disclosed wherein advantageously at least part of...
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4824481 |
Sputtering targets for magneto-optic films and a method for making
Sputtering targets are made by melting at least one rare earth and at least one transition metal to produce an amorphous alloy melt, forming a powder of the alloy in an oxygen free atmosphere,...
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4820481 |
Method for the continuous fabrication of hydrogen storage alloy negative electrodes
An improved method for the continuous fabrication of metal-hydride, electrochemical, hydrogen storage alloy, negative electrodes for use in rechargeable nickel metal hydride cells. The improved...
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4799955 |
Soft composite metal powder and method to produce same
Disclosed is a composite metal powder made from a base iron powder milled with an alloying component such as nickel, copper, managnese, chromium, silicon, phosphorus, boron, vanadium, and...
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4762679 |
Billet conditioning technique for manufacturing powder metallurgy preforms
A process for manufacturing powder metallurgy (P/M) preforms which are conditioned for optimum intrinsic workability is described which comprises steps of heating a quantity of P/M material in a...
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4758404 |
Method of producing composite material for sliding member
In a method of producing a composite material for a sliding member having a sliding portion and a backing material which supports the sliding portion, the method comprises the steps of: disposing a...
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4755221 |
Aluminum based composite powders and process for producing same
Composite powder particles which are essentially spherical in shape are disclosed which consist essentially of particles of a matrix phase which consists essentially of a metal selected from the...
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4743185 |
Corrosion resistant mercury-free zinc anode battery
An electrochemical cell comprising a zinc electrode in an electrolyte solution wherein the electrode is formed from a zinc powder compacted to a density of at least about 6.5 g/cc to substantially...
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4743512 |
Method of manufacturing flat forms from metal powder and product formed therefrom
A method of manufacturing a flat form from blended metallic powder including a major constituent by weight having a high melting point and a minor constituent by weiht having a substantially lower...
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4735770 |
Method for producing an amorphous material in powder form by performing a milling process
By the inventive method, an amorphous material in powder form can be produced, whereby at least two starting components in powder form are mechanically alloyed by means of a milling process so that...
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4732622 |
Processing of high temperature alloys
A method of producing products from a mechanically alloyed, dispersion strengthened iron-base powder comprises consolidating the powder and working the consolidated body to the desired product...
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4724121 |
Powder treatment process
(1) A process comprising spray drying a powder-containing slurry, the slurry containing a powder constituent susceptible of oxidizing under the temperature conditions of the spray drying, while...
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4719077 |
Method for the preparation of an alloy of nickel and titanium
An alloy of nickel and titanium in the atomic ratio of 49:51 to 56:44 can be prepared at a temperature much lower than the eutectic point of the corresponding alloy. Thus, a green compact of a...
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4716019 |
Process for producing composite agglomerates of molybdenum and molybdenum carbide
A process is disclosed for producing composite agglomerates of molybdenum and molybdenum carbide (Mo 2 C). The process involves forming a relatively uniform mixture of non-agglomerated molybdenum...
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4707332 |
Sintering process for prealloyed powders
A process for manufacturing structural parts of complicated shape from intermetallic phases capable of sintering by means of special additives which serve at the same time as sintering assist and...
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4704252 |
Isostatic hot forming of powder metal material
A crushed powder metal workpiece preform is enclosed in a shell or envelope of a ceramic liquid die material and is inductively heated through the ceramic material and then transferred to a...
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4699657 |
Manufacture of fine grain metal powder billets and composites
Very fine grain metal billets are produced by loading alloy metal powder of desired composition into a metal extrusion container in successive layers of two or four inches deep. Each layer after...
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4689196 |
Silver-tungsten carbide-graphite electrical contact
An electrical contact comprises 5 to 20 weight percent tungsten carbide, 0.5 to 3 weight percent graphite, balance silver. The contact has low erosion rate, low contact resistance, and anti-welding...
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4676829 |
Cold worked tri-nickel aluminide alloy compositions
Improvements in the positive temperature dependence of yield strength and in the work hardening rate of tri-nickel aluminide base alloys are achieved. The novel alloy composition has seven alloying...
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4676949 |
Method of producing metal sinters
A tetrafluoroethylene-type fluoroplastic powder is added and mixed with a metal powder and the mixture is shaped. The compact is heated in a nonoxidizing atmosphere and the oxides on the surface of...
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4670215 |
Process for forming a wear-resistant layer on a substrate
There is disclosed a process for forming a wear-resistant, sintered layer on a metallic substrate. The process comprises steps of adhesively attaching to a surface of metallic substrate an alloy...
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4668290 |
Dispersion strengthened cobalt-chromium-molybdenum alloy produced by gas atomization
A dispersion strengthened cobalt-chromium-molybdenum alloy produced by gas atomization containing a fine oxide dispersion, and characterized, after fabrication by gas atomization, thermomechanical...
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4647426 |
Production of billet and extruded products from particulate materials
Methods and apparatus are disclosed for consolidating loose or pre-compressed particulate materials, such as metal powder or metal flakes, in press equipment utilizing a reusable canister means...
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4640711 |
Method of object consolidation employing graphite particulate
The method of consolidating a metallic, metallic and ceramic, or ceramic body in any of initially powdered, sintered, fibrous, sponge, or other form capable of compaction, includes the steps: ...
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4639352 |
Hard alloy containing molybdenum
This invention relates to a hard alloy comprising two phases: a hard phase consisting of at least one compound having a crystal structure of simple hexagonal MC type (M: metal; C: carbon) selected...
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4636253 |
Diamond sintered body for tools and method of manufacturing same
A diamond sintered body for tools contains a diamond content in excess of 93 percent and not more than 99 percent by volume and a residue including at least one of a metal or a carbide selected...
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4632702 |
Manufacture and consolidation of alloy metal powder billets
Metal powder of the desired composition having a particle size of -80 mesh is charged into an extrusion container, preferably a piece of carbon steel pipe, in successive layers about two inches...
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4615735 |
Isostatic compression technique for powder metallurgy
Powder metallurgy products of high tensile strength are formed in a pore-free state by a novel process which entirely avoids the use of canisters. An open-pore specimen is purged with depurative...
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4609525 |
Cadmium-free silver and metal oxide composite useful for electrical contacts and a method for its manufacture
The composite according to the invention is prepared by milling an atomized silver, two metal oxide alloy powder dry or wet in a mill in order to reduce its particle size and deform its particle...
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4609526 |
Method for compacting alloy powder
A method for producing high speed, tool and die steel articles from prealloyed powders. The method comprises placing particles of a prealloyed steel composition from which the article is to be made...
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4592780 |
Production of flat products in strip sheet or like form
A process for producing a flat product such as a coin includes the steps of forming a slurry comprising a suspension of particulate material in a film-forming cellulose derivative, depositing a...
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4591480 |
Method for sealing porous metals
A method for sealing porous metals, which comprises applying powder of a eutectic alloy containing an element having a good diffusibility in a porous metal or powder of a mixture of metals capable...
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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...
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