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7326306 |
In the present invention, after a nitriding process is performed on a steel, a passivating process in which the steel is heated under an atmosphere containing oxygen is performed. The heating condition of the passivating process is withi...
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7273857 |
Benzimidazolidinone derivative compounds, which increase acetylcholine signaling or effect in the brain, and highly selective muscarinic agonists, particularly for the M 1 and/or M 4 receptor subtypes, pharmaceutical compositions compr...
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7264682 |
A borided titanium article can include a titanium mass having titanium monoboride whiskers infiltrating inward from a surface of the titanium mass to form an integral surface hardened region. The titanium mass can be almost any titanium ...
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7132129 |
A method of forming a diamond coating on an iron-based substrate, comprising: providing an iron based substrate with an outer layer which substantially comprises metal borides; and depositing the diamond coating on the outer layer using ...
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7115174 |
In a known method for producing an oxide layer on metal parts, the metal parts are heat-treated in a treatment chamber during a carburization phase at temperatures below 1100° C. [2012° F.] in an atmosphere containing carbon monoxide a...
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6982120 |
The invention relates to components made of steel, more particularly outer joint parts and inner joint parts of constant velocity joints, and to a process of heat treating such components made of steel. The heat treatment operation inclu...
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6846367 |
Disclosed is a method for improving the wear- and corrosion-resistance of a chromium-plated steel substrate by heat-treating the chromium-plated steel substrate under optimum conditions to inhibit a drop in corrosion-resistance of a stee...
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6808680 |
A method is disclosed for prevention or stoppage of sulfidation or sulfuric corrosion of metal surfaces in contact with fluids including sulfiding compounds, where the method involves the addition of a compound to the fluid, where the ad...
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6807897 |
The present invention relates to a hydraulic piston and a process for its surface treatment in order to improve above all the wear resistance and corrosion resistance at the surface of the piston. As a favorable manufacturing process for...
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6774059 |
A new method of creating a relatively thick layer of PE silicon nitride. A conventional method of creating a layer of silicon nitride applies a one-step process for the creation thereof. Film stress increases as the thickness of the crea...
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6645315 |
In a surface treatment process for mechanical parts, for conferring on the parts a high resistance to wear and corrosion and a roughness propitious to lubrication, nitriding of the part is followed consecutively by oxidation of the part....
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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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6503344 |
A boronizing agent in the form of a paste for the production of boride layers on metallic workpieces. The boronizing agent contains boron-releasing substances, activating substances and the remainder of inert, refractory extenders togeth...
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6503340 |
A method for producing chromium carbide coatings on steel provides a steel component having a surface which is carburized to contain at least about 0.40% by weight carbon and is followed by chromizing the surface to form a chromium carbi...
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6482272 |
A method is disclosed for prevention nitridation or carburization of metal surfaces in contact with a fluid including nitriding agents or carburizing agents where the method involves adding to the fluid an effective amount a sulfur-conta...
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6428849 |
The invention discloses a method for producing a nitrogen-silicon containing stainless steel layer on a metal. The method includes a pack cementation process involving the use of silicon nitride, silica and sodium fluoride as the source ...
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6328819 |
A method is provided for heat treatment of metal workpieces obtain a substantially uniform nitride layer, even in workpieces comprising high alloy iron articles. The following method steps are provided: a) heating the workpieces to a ...
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6309474 |
In a method for producing maraging steel, a thin plate of maraging steel is subjected to an aging treatment, is then subjected to a fluoridation processing in which the thin plate is heated and maintained in a fluoric reacting gas includ...
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6294029 |
A surface treating and smoothing method of surface-treating and smoothing a sliding member including steps of finishing the sliding member by pressurized particle containing fluid blasting to a sliding surface with surface roughness rang...
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6284388 |
The present invention is directed to a method of forming an electrically insulating layer on a steel article such as a stack of electrical steel laminations or an individual, unstacked electrical steel lamination, comprising exposing the...
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6245162 |
A boriding agent for generating boride layers on metallic workpieces, containing boron-releasing substances, activating substances and, in the remainder, refractory, inert extender. The activating substance is a combination of 1 to 5 wt....
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6221501 |
The present invention is directed to a method of forming an electrically insulating layer on a steel article such as a stack of electrical steel laminations or an individual, unstacked electrical steel lamination, comprising exposing the...
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6179932 |
A motor rotary shaft according to the present invention is constructed only at the surface layer of a journal portion with a hard nitride layer, so that the resultant motor rotary shaft is available at a low cost, not so heavy and excell...
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6117249 |
A method of treating a metallic machine part to increase wear life and to change surface appearance comprising the steps of roughening the surface, thereafter changing its color by case hardening and, subsequently, increasing the lubrici...
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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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6090223 |
By forming a Cr playing layer on the surface of a metal and forming a CrN film by nitriding the surface thereof, it is possible to improve the surface hardness, wear resistance, corrosion resistance, etc., of the metal; wherein the nitri...
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6017401 |
A method of increasing conductivity of a refractory metal film disposed upon a substrate includes exposing the refractory metal film to an atmosphere comprising a silane of the form Si n H (2n+2), where n is a positive integer, while su...
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5948177 |
A method of surface treating a metallic machine tool element includes heating the element prior to insertion of the metal element into a nitrating salt bath for the purpose of both hardening the element and improving the resilience of po...
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5935722 |
A laminated composite structure of alternating metal powder layers, and layers formed of an inorganic bonding media powder, and a method for manufacturing same are discosed. The method includes the steps of assembling in a cavity alterna...
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5912399 |
A new tungsten compound is formed by reacting ammonium metatungstate with guanidine carbonate. Such a compound can be converted to metallic tungsten, tungsten carbide or oxycarbide, and tungsten nitride or oxynitride. One can also make m...
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5840132 |
Ultralow friction properties available through the annealation and subsequent cooling of various boron-containing substrates, articles and/or components.
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5753052 |
In a method of increasing the wear resistance and the corrosion resistance f opposed bearing surfaces of parts subjected to reciprocal friction, in particular when the product of the pressure distributed over the bearing surfaces by the ...
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5735971 |
Flawless nitrating layers are obtained during the nitro-carburizing of components made from steels which form passive layers in salt baths if these components are first pre-treated in an oxidizing salt melt at 300° to 500° C. prior to ...
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5704994 |
A shaped object with a roughened surface is immersed in an aqueous solution of a metal salt and/or a solution of an organic metal. After the shaped object is dried, it is heated to form a metal-diffused layer in the shaped object and a 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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5653822 |
A method of applying a surface coating to promote gas carburization of a highly alloyed steel. The method includes the step of coating the highly alloyed steel with a layer of iron or an iron alloy to form a coated steel before carburizi...
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5593571 |
A method for reforming hydrocarbons comprising coating portions of a reactor system with a material more resistant to carburization, reacting the material with metal oxides existing in the portions of the reactor system prior to coating,...
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5582655 |
A case nitrided aluminum product is produced by contacting an aluminum product with a nitriding agent at a part of a surface thereof at least, and by nitriding the aluminum product at the surface with an ambient gas at a temperature of a...
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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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5505791 |
The present invention relates to nickel alloy products with their surfaces nitrided and hardened which are formed by pressure casting nickel alloy material, and nitrided and hardened layers are formed in surface layers. Since the nitride...
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5480471 |
A permanent magnet alloy and method for production thereof. The permanent magnet alloy has a rare earth element including Nd, B, Fe, C, and oxygen, with additions of Co and at least one of Cu, Ga and Ag. The alloy may be produced by cont...
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5447599 |
The present invention features a process and a resulting article in which copper-based multilevel interconnects are fabricated. The copper-based multilevel interconnect formed by the inventive process first includes the process step of d...
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5421914 |
A method and article of manufacture of a coated iron based alloy. The method includes providing an iron based alloy substrate, depositing a silicon containing layer on the alloy surface while maintaining the alloy at a temperature of abo...
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5419787 |
An insulating film with low thermal expansion characteristics is formed by depositing aluminum alloy materials in thin film form without the use of high temperatures and which can then be oxidized to create an insulating film which has l...
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5413700 |
A method for reforming hydrocarbons comprising coating portions of a reactor system with a material more resistant to carburization, reacting the material with metal oxides existing in the portions of the reactor system prior to coating,...
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5405525 |
A method for reforming hydrocarbons comprising coating portions of a reactor system with a material more resistant to carburization, reacting the material with metal sulfides existing in the portions of the reactor system prior to coatin...
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5383979 |
In a process for producing a workpiece from sintered metal, especially from sintered iron, the latter is subjected, after sintering, to a steam treatment at temperatures below 500° C., especially at 430°-480° C., at a steam partial pr...
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5372654 |
The present invention provides a steel sheet for press working that exhibits excellent stiffness and satisfactory press workability. The steel sheet for press working includes: a composition of C+N+B=0.007 to 1.0 wt % in a region from th...
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5372629 |
Apparatus and method for making powder from a metallic melt by atomizing the melt to form droplets and reacting the droplets downstream of the atomizing location with a reactive gas. The droplets are reacted with the gas at a temperature...
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5346560 |
Precision ferrous metal parts subject to severe friction and corrosion in e are nitrided, preferably in a bath of molten salts based on CNO - cyanate ions, oxidized, preferably in baths of molten oxidizing alkaline salts, and then impre...
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