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7442225 |
The present invention provides a worked molybdenum-alloy material that can be used at higher temperatures than at least temperatures at which known TZM alloys are used. A worked molybdenum-alloy material having high strength and high to...
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7291229 |
A method of carburizing treatment is proposed in which if carburizing is carried out at a low temperature, carbon will not turn amorphose and deposit on the surface of a titanium metal but reliably penetrate into between metallic atoms. ...
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7118635 |
The invention relates to a method for producing wolfram carbides by gas-phase carburetion of wolfram powders and/or suitable wolfram precursor compounds in powder form at temperatures above 850° C. According to the method a CO 2 /CO mix...
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6833197 |
A method of case hardening an article formed of titanium, zirconium or an alloy of titanium and/or zirconium is disclosed. First, the article is heat-treated in an oxidizing atmosphere at a temperature in the range of 700 to 1000° C. so...
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6749663 |
A process is described for the preparation of tungsten and/or molybdenum metal powder or carbide by reducing and optionally carburizing treatment of tungsten and/or molybdenum oxide powder in the presence of alkali metal compounds, where...
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6623568 |
A Ti alloy poppet valve consists of a valve stem and a valve head, and is employed as intake or exhaust valve in an internal combustion engine of an automobile. O 2 is put into the valve in a furnace at very slight amount and heated to ...
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6605160 |
This invention pertains to the repair of parts comprising metals, and surfaces and coatings of these parts using reactive metals coating processes. Processes such as chemical vapor deposition (CVD), physical vapor deposition (PVD), plasm...
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6589368 |
The present invention provides a refractory-metal-based alloy material having a remarkably enhanced toughness and strength, by internally nitriding a nitride-forming metal element incorporated as a solid solution into an alloy worked pie...
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6524366 |
Tungsten carbide is formed from a tungsten material which is preferably tungsten carbide scrap. If scrap material is used, this is oxidized and acid leached to remove impurities and any binder material. This is then dissolved in a soluti...
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6511551 |
The present invention relates to a method of adding a grain growth inhibitor of WC/Co cemented carbide, which comprises adding a water-soluble salt of V, Ta, or Cr component as a grain growth inhibitor, at the time of mixing water-solubl...
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6461448 |
A method for case hardening a chromium bearing nickel or ferrous based alloy, for example stainless steel, article, the method including the steps of activating the surface of the article; and carburizing the activated surface at a tempe...
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6458218 |
A method is provided for depositing and thermally diffusing a boride or a carbide of a refractory metal on a substrate of a workpiece. A layer of the refractory metal is deposited on the substrate. At least one of the elements boron and ...
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6451129 |
A decorative titanium material according to the present invention eliminates a deterioration of the appearance even after processing, that is, provides a small surface roughness, and has a hardened layer of titanium at the surface of the...
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6293989 |
The present invention relates to a method of producing nanophase WC/TiC/Co composite powder by means of a mechano-chemical process comprising a combination of mechanical and chemical methods. For this purpose, the present invention provi...
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6267825 |
A method for treating metal workpieces, including non-ferrous metal workpieces such as Titanium. The metal workpieces are heat soaked for a predetermined amount of time in a furnace at a predetermined temperature. An interstitial element...
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6238491 |
The present invention is a medical implant or device fabricated, in any manner, from a niobium (Nb)--titanium (Ti)--zirconium (Zr)--Molybdenum (Mo) alloy (NbTiZrMo alloy). The implant or device has components at least partially fabricate...
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6221174 |
The present invention is a method of wafer processing which improves the reliability of an integrated titanium (Ti)/titanium nitride (TiN) CVD film formed from a reaction of titanium tetrachloride (TiCi 4 ) and ammonia (NH 3 ). A Ti film...
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6210494 |
A structure and method of making resistive emitting members which exhibit high resistivity while at the same time providing high temperature operation significantly above that known in the art. Specifically the use of nitrides of Group I...
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6113668 |
The manufacture of powdered feed materials for hard fine grained metal body production includes the reduction of metal oxides into powdered metal and the subsequent carburization into metal carbide. Processes currently used are very cost...
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6093259 |
This invention provides color development methods of metallic titanium used for manufacture of black titanium or titanium tinted in other chromatic colors. In one method, metallic titanium is treated with an alkali solution. It enables c...
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6001227 |
Improved targets for use in DC - - magnetron sputtering of aluminum or like metals are disclosed for forming metallization films having low defect densities. Methods for manufacturing and using such targets are also disclosed. Conductivi...
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5916383 |
A method for shot peening a hard metal product that has a hardened surface. The method includes projecting shot on the hardened surface of the hard metal product. The ratio of the Vickers hardness of the shot to that of the hardened surf...
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5916377 |
Packed bed carburization of a tantalum or tantalum alloy object. A method for producing corrosion-resistant tantalum or tantalum alloy objects is described. The method includes the steps of placing the object in contact with a carburizin...
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5885372 |
Grain growth inhibitors including vanadium carbide, chromium carbide, tantalum carbide, and niobium carbide are incorporated into a cobalt/tungsten carbide matrix during the formation of the cobalt/tungsten carbide matrix. A precursor po...
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5792289 |
A titanium alloy product having good tribological properties without the need to introduce an alloying element into the surface is produced by casting or casting and forging a titanium alloy consisting of 2 to 15% by weight silicon or 5 ...
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5776264 |
Amorphous tungsten, cobalt, nickel, molybdenum, iron and alloys thereof can be formed by reducing metal-containing compositions to form the elemental metal wherein the particle size of the elemental metal is less than about 80 microns. T...
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5746803 |
A transition metal carbide-Group VIII metal powder comprising discrete particles of a transition metal carbide and Group VIII metal wherein: substantially all of the particles have a size of at most 0.4 micrometer; the transition metal c...
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5662745 |
Bars of titanium alloys suited for the manufacture of at least the stems (2), (3) of engine valves are mass-producible while maintaining good configurational and dimensional accuracies throughout the valve fabricating process and the wea...
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5658395 |
According to the present invention there is now provided a method for preparing a powder containing W and Co and/or Ni characterized in reacting APT and a soluble salt of Co (Ni) in water at temperatures from room temperature to the boil...
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5632824 |
There is disclosed a method for preparing a powder containing ammonium salts of W+Co(Ni) complex ions, through chemical reactions, in a water solution at temperatures from 70° C. to the boiling point and at pH around neutral, between tu...
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5593511 |
Titanium films are nitrided at temperatures less than 650° C., and preferably between 400° C. and 500° C., by treating the titanium film with a plasma formed from a nitriding gas at elevated temperatures. The plasma is created by subj...
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5584907 |
There is now provided a method for preparing a powder containing W and Co and/or Ni from APT and a soluble salt of Co(Ni) by a chemical reaction in a water suspension at temperatures from room temperature to the boiling point of the solu...
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5573604 |
The process serves for the manufacture of an erosion-resistant turbine blade which is preferably used in the low-pressure stage of a steam turbine and is made of a vanadium-containing (α/β)-titanium base alloy. This involves the format...
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5525165 |
A cyaniding process, operating in a molten cyanide salt, and a nitriding process, operating in a Tufftride salt bath, can be utilized to modify the near-surface microstructure of Ti-6Al-4V alloy. The surface-hardened layers have been cha...
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5466305 |
The surface of titanium is treated to reduce the friction coefficient and wear loss without sacrificing its corrosion resistance. Pure titanium or titanium alloy is subjected to plasma-carburizing in an atmosphere containing hydrocarbon ...
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5405456 |
Disclosed is a process of surface hardening for titanium alloys comprising α phase by carburization in a molten salt which consists of carbonate as the carbon-yielding agent with electrolysis within 790° C. to 930° C. The hardness wit...
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5383981 |
A reusable, non-wetting, corrosion-resistant material suitable for containment of corrosive liquids is formed of a tantalum or tantalum alloy substrate that is permeated with carbon atoms. The substrate is carburized to form surface laye...
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5372655 |
Method for the treatment of alloy steels and refractory metals such as Ti, Zr and Nb, especially for depassivation and subsequent thermochemical surface treatment in a process chamber (1, 2) under the action of pressure and temperature, ...
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5366563 |
The surfaces of a metal or alloy component are scrubbed by a high-velocity stream of inert gas at temperatures which facilitate removal of contaminants. Simultaneous with scrubbing, the impurities are captured in a separated loop of one ...
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5338374 |
A process for forming a copper alloy which is strengthened while maintaining good electrical and thermal conductivity by the addition of TiN or ZrN consists of external nitridation of a mechanically alloyed powder mixture followed by fur...
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5320686 |
Objects of titanium or titanium alloys having the surface converted to a hard and wear-resistant nitride layer with good adhesion, which is distributed uniformly and also provides internal capillaries. The objects are produced by being t...
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5298091 |
A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of nitrogen into...
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5265137 |
Methods and apparatus for improving fretting resistance of zirconium alloy components formed into a shape for use in a nuclear reactor are disclosed in which at least a portion of the outer surface of a component is reacted with material...
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5254183 |
Elements for use as protecting fuel contacting surfaces of a gas turbine engine are protected from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of ni...
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5252147 |
The surface properties of copper-refractory metal (CU-RF) alloy bodies are modified by heat treatments which cause the refractory metal to form a coating on the exterior surfaces of the alloy body. The alloys have a copper matrix with pa...
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5252145 |
A method of nitriding nickel alloy comprising steps of holding nickel alloy in an atmosphere of fluorine- or fluoride-containing gas in a heated condition and holding the fluorinated nickel alloy in a nitriding atmosphere in a heated con...
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5232522 |
A process is disclosed for forming a coating on a substrate. A metal layer is placed onto the substrate either by plasma spray deposition or by applying a metal foil and then subjecting it to rapid omnidirectional compaction. The metal i...
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5207839 |
Substantially all residual oxidizing gas in a treating atmosphere which is inert or reducing, is eliminated by injecting into the atmosphere a gaseous silicon hydride at a temperature between 50 and 1,600° C. and in amount such that the...
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5188979 |
A process for forming a titanium nitride barrier layer in semiconductor devices using preheated ammonia reduces susceptibility to junction spiking. In one form of the invention, a substrate having an overlying layer of titanium is heated...
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5141574 |
A wear-resistant titanium alloy containing titanium carbides which are crystallized and/or precipitated and are dispersed in the β-phase matrix is disclosed. The alloy may further comprise α-phase and/or additional hard particles dispe...
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