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7572344 |
Method for the production of wear-resistant sides for a keystone ring for internal combustion engine
A method for the production of wear-resistant edges for a keystone ring for internal combustion engines, involves forming a rectangular ring from a steel strip with a rectangular cross-section,...
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7524791 |
Method for producing substrate having carbon-doped titanium oxide layer
A method for producing a substrate having a carbon-doped titanium oxide layer, which is excellent in durability (high hardness, scratch resistance, wear resistance, chemical resistance, heat...
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7326306 |
Method for producing nitriding steel
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...
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7264682 |
Titanium boride coatings on titanium surfaces and associated methods
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...
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7132129 |
Method of forming a diamond coating on an iron-based substrate and use of an iron-based substrate for hosting a CVD diamond coating
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...
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7115174 |
Method for producing and oxide layer on metallic elements
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...
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6982120 |
Hardened steel components and process of treating the same
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...
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6846367 |
Heat-treating method for improving wear-resistance and corrosion-resistance of chromium-plated steel substrate
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...
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6808680 |
Method of preventing or stopping sulfuric corrosion of metals
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...
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6807897 |
Hydraulic piston and process for its surface treatment
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....
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6774059 |
High crack resistance nitride process
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...
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6645315 |
Surface treatment process for mechanical parts subject to wear and corrosion
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...
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6524366 |
Method of forming nanograin tungsten carbide and recycling tungsten carbide
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...
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6503340 |
Method for producing chromium carbide coatings
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...
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6503344 |
Boronizing agent in paste form
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...
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6482272 |
Method of preventing nitridation or carburization of metals
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...
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6428849 |
Method for the co-deposition of silicon and nitrogen on stainless steel surface
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,...
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6328819 |
Method and use of an apparatus for the thermal treatment, in particular nitriding treatment, of metal workpieces
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...
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6309474 |
Process for producing maraging steel
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...
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6294029 |
Method of treating and smoothing sliding surface
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...
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6284388 |
Steel with electrically insulating hematite layer
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...
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6245162 |
Boriding agent
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...
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6179932 |
Motor rotary shaft and manufacturing method thereof
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...
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6117249 |
Treating metallic machine parts
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...
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6093259 |
Color development method of metallic titanium and black and colored titanium manufactured by this method
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...
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6090223 |
Chromium nitride film and method for forming the same
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...
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6017401 |
Conductivity improvement in thin films of refractory metal
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),...
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5948177 |
Collet metal treating process
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...
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5935722 |
Laminated composite of magnetic alloy powder and ceramic powder and process for making same
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...
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5912399 |
Chemical synthesis of refractory metal based composite powders
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...
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5840132 |
Lubricated boride surfaces
Ultralow friction properties available through the annealation and subsequent cooling of various boron-containing substrates, articles and/or components.
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5753052 |
Method of treating ferrous surfaces subjected to high friction strains
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...
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5735971 |
Method for the Pre-treatment of steel parts prior to salt bath nitriding
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...
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5704994 |
Method of case-hardening shaped object
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...
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5662745 |
Integral engine valves made from titanium alloy bars of specified microstructure
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...
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5653822 |
Coating method of gas carburizing highly alloyed steels
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...
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5593571 |
Treating oxidized steels in low-sulfur reforming processes
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...
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5582655 |
Case nitrided aluminum product, process for case nitriding the same, and nitriding agent for the same
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...
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5573604 |
Process for manufacturing a turbine blade made of an (alpha/beta)-titanium base alloy
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...
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5505791 |
Process of producing nitrided and hardened nickel alloy products
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...
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5447599 |
Self-aligned process for capping copper lines
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...
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5421914 |
Surface modification of high temperature iron alloys
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...
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5419787 |
Stress reduced insulator
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...
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5405525 |
Treating and desulfiding sulfided steels in low-sulfur reforming processes
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...
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5383979 |
Process for producing a surface-hardened workpiece from sintered iron
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...
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5372629 |
Method of making environmentally stable reactive alloy powders
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...
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5372654 |
Steel sheet for press working that exhibits excellent stiffness and satisfactory press workability
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...
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5346560 |
Process for the treatment of ferrous metal parts to improve their corrosion resistance and friction properties simultaneously
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...
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5342455 |
In-situ generation of heat treating atmospheres using a mixture of non-cryogenically produced nitrogen and a hydrocarbon gas
A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals, sealing glass to metals, and sintering...
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5334263 |
Substrate stabilization of diffusion aluminide coated nickel-based superalloys
A superalloy article has a nickel-based superalloy substrate containing TCP-phase forming elements such as rhenium, chromium, tantalum and tungsten. A carbide precipitate-containing region is...
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