Class 148/212 - Nitriding

Subclass of Class 148 - Metal treatment
Definition: Process which involves exposing a metal substrate or workpiece
No. of patents: 44
Last issue date: 02/07/2012

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Number	Title	Issue Date
8110048	Magnetic powder suitable for low-noise media A method for producing a magnetic powder comprised chiefly of Fe16N2 comprising providing a starting powder comprising an oxy-hydroxide or oxide of iron and an amount of noble metal. The starting powder is reduced into an iron powder by a dry m...	02/07/2012
7655100	Method for preparation of steel material A raw steel is coated with or surrounded by a boron compound (step S1). A coating film of h-BN is formed on the surface of the raw steel. Then, the raw steel is nitrided by a nitriding gas while being heated (step S2). B from the boron compound and N f...	02/02/2010
7438769	Process for diffusing titanium and nitride into a material having a coating thereon A method for diffusing titanium and nitride into a base material having a coating thereon using conventional surface treatments or coatings. The method generally includes the steps of providing a base material having a coating thereon; providing a salt bath which in...	10/21/2008
7438768	Rare earth element sintered magnet and method for producing rare earth element sintered magnet Hydrogen embrittlement is prevented in Sm2Co17-based magnets and R2Fe14B-based magnets by metal plating the magnet, then carrying out heat treatment, or by forming a metal oxide or metal nitride layer on the metal plating ...	10/21/2008
7259351	Heat treating assembly and method The subject invention provides a heat treating assembly. The heat treating assembly comprises a laser, a substrate, and a tool. The laser emits laser energy directed toward the substrate and the tool. The substrate absorbs the laser energy and produces heat energy w...	08/21/2007
7243466	Anti-seismic system The present invention provides a system and method for protecting buildings from damage due to seismic waves. The system comprises a bed of sand contained between two layers of polymer membrane, upon this sand bed a rests a first concrete slab, this first concrete s...	07/17/2007
7241368	Hafnium silicide target for gate oxide film formation and its production method The present invention relates to a hafnium silicide target for forming a gate oxide film composed of HfSi0.05-0.37. Obtained is a hafnium silicide target superior in workability and embrittlement resistance, and suitable for forming a HfSiO film and HfSiO...	07/10/2007
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 steel. The heat treatment operation includes the process stages of nit...	01/03/2006
6933053	Alpha Al2O3 and Ti2O3 protective coatings on aluminide substrates In accordance with one aspect of the present invention, a process for forming a specific reactive element barrier on a titanium and aluminum containing substrate is provided. The process includes creating a dry air atmosphere with a concentration of water vapor belo...	08/23/2005
6830700	Method and device for removing particles from liquid A method and device for removing particulate matter from a liquid medium, especially a molten salt bath. The structure includes a device for capturing and removing particulate matter from a liquid medium. In operation, the device is inserted into the liquid having t...	12/14/2004
6814927	Fabrication method of nanostructured tungsten carbide bulk material A nanostructured tungsten carbide bulk material, sintered from tungsten carbide and metal such as cobalt nano-powders, comprises a tungsten carbide and a metallic binder such as cobalt phases. The tungsten carbide phase has nanostructures comprising a plurality of d...	11/09/2004
6811507	Plate-link chain A continuously variable, conical disk transmission including a torque-transmitting member in the form of a plate-link chain or a thrust link band. The chain includes plate links that are interconnected by pairs of rocker members that extend transversely relative to ...	11/02/2004
6790294	Spring with excellent fatigue endurance property and surface treatment method for producing the spring Hard metal particles having hardness which is lower than the hardness of a nitrided outermost layer of a spring and in the range of Hv 500 to 800 and a diameter of 500 to 900 μm are protected against the nitrided surface of the spring at a velocity of 40 to 90 m/se...	09/14/2004
6723175	Formed member made of steel sheet and method for producing same A method for producing a formed member made of a steel sheet according to the present invention is characterized by preparing a steel sheet material having tensile strength of 500 MPa or less and containing a nitriding element; forming a formed member having a prede...	04/20/2004
6238489	Methods and apparatus for masking a percussive drill member prior to a surface treatment thereof A metallic drilling member is surface hardened except at an end portion, because the end portion is masked. The masking is achieved by placing on the end portion a lid which forms a slight gap around the surface being heat treated. During the heat treatme...	05/29/2001
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 available at a low cost, not so heavy and excellent in durability ...	01/30/2001
6017641	Coil spring resistive to delayed fracture and manufacturing method of the same A coil spring made of an oil-tempered steel wire with internal hardness of more than Hv 550 in cross-section, the surface hardness of the oil-tempered steel wire being determined in an extent between Hv 420 in a minimum value and hardness defined by subtr...	01/25/2000
5849158	Ion nitrided creping doctor blade Creping doctor blades useful for making soft tissues are substantially improved by ion nitriding the surface(s) of the doctor blade to produce a hardened surface while retaining the resilient interior of the non-treated blade. The resulting blades have ap...	12/15/1998
5690756	Method for producing cast iron gear A method for producing cast iron gears includes the steps of heating a blank composed of cast iron and having a teeth forming part to such a temperature that at least the teeth forming part is at least austenitized, and hot rolling the teeth forming part ...	11/25/1997
5669988	Corrugating roll and manufacturing method thereof Object: Prevention of generation of press marks as well as increase of wear resistance at a corrugation tip portion and thereby providing a corrugating roll having a much improved life. Construction: A manufacturing method of a corrugating roll useful for ...	09/23/1997
5645944	Application of molybdenum alloys The invention relates to the application of molybdenum alloys, which are superficially hardened by means of nitriding, for female dies and comparable construction components for extruding light and nonferrous metals. It is possible through the application...	07/08/1997
5599404	Process for forming nitride protective coatings A substrate material to be coated with either a nitride, carbide, or oxide contains a small percent of a specific reactive element, like titanium, which forms very stable nitrides, carbides, or oxides. The material also contains larger percentages of elem...	02/04/1997
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 (଱/ଲ)-titanium base alloy. This involves the formation, by ...	11/12/1996
5522520	Method for forming an interconnection in a semiconductor device An interconnection in a semiconductor device is made of a conductive laminate including a Ti film, a TiN film and an aluminium alloy film consecutively formed on a SiO2 film grown on a Si substrate. A heat treatment of the conductive layer is p...	06/04/1996
5499936	Monolithic metallic drive shafts which are resistant to corrosion and wear A monolithic metallic drive shaft for a marine propulsion device is disclosed which is resistant to corrosion. The drive shaft comprises proximal and distal end portions, each of which has a predetermined surface hardness. The surface hardness of one of t...	03/19/1996
5376187	Diffusion bonding of aluminum and aluminum alloys The diffusion bonding of aluminum and aluminum alloys presents problems because, when left exposed to the atmosphere even for a short time, they acquire an extremely tenacious surface oxide layer that inhibits or prevents satisfactory diffusion bonding. U...	12/27/1994
5330587	Shaft of laser nitride-hardened surface on titanium A process for producing a crack-free, laser nitride-hardened layer on a titanium substrate, the process including preheating the substrate, melting a small area of substrate with a laser, and shrouding the melted area with a gas mixture having a maximum c...	07/19/1994
5320686	Method of producing integral, hard nitride layer on titanium/titanium alloy 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 treated in a vacuum...	06/14/1994
5292381	Piston ring and process for manufacturing the same The object of the present invention is to provide a piston ring which is free from occurrence of cracks on the nitrided layer and having enhanced abrasion resistance and fatigue strength, and to provide a process for manufacturing the piston ring. In the ...	03/08/1994
5290368	Process for producing crack-free nitride-hardened surface on titanium by laser beams A process for producing a crack-free, laser nitride-hardened layer on a titanium substrate, the process including preheating the substrate, melting a small area of substrate with a laser, and shrouding the melted area with a gas mixture having a maximum c...	03/01/1994
5272015	Wear resistant hyper-eutectic aluminum-silicon alloys having surface implanted wear resistant particles Hyper-eutectic aluminum-silicon alloys are surface treated with nitrogen and carbon by ion implantation means so as to form hard, wear resistant particles of silicon nitride and silicon carbide which are surrounded by a hard matrix of aluminum nitride and...	12/21/1993
5244375	Plasma ion nitrided stainless steel press plates and applications for same A press plate hardened by the use of plasma ion nitriding techniques produces wear resistant decorative laminate containing hard abrasive particles while improving associated press plate useful life. The press plate has exacting final microfinish requirem...	09/14/1993
5211768	Method of nitriding work pieces of steel under pressure Very low-pore, thick nitride cases may be obtained in a short time during a gas nitriding process in accordance with the invention. This process includes nitriding in a gaseous mixture containing about 5 to 95% by volume ammonia and about 95 to 5% by volu...	05/18/1993
5192485	Continuous annealing line having carburizing/nitriding furnace A continuous annealing line for annealing a cold-rolled strip of a ultra-low-carbon steel comprising a heating furnace for heating the strip which is fed continuously, with or without a soaking furnace following the heating furnace, a cooling furnace in w...	03/09/1993
5039357	Method for nitriding and nitrocarburizing rifle barrels in a fluidized bed furnace A method for nitriding and nitrocarburizing the bores of rifle barrels or similar elongated hollow objects in which a funnel is attached to the inlet end of each of rifle barrel prior to treatment. The rifle barrels are then loaded into a fluidized bed fu...	08/13/1991
4969378	Case hardened roller cutter for a rotary drill bit and method of making A roller cutter (28) for a rotary drill bit (10) and method of making, utilizing an ion nitriding hardening process for the external surface (42) and the internal bearing surfaces (33, 34, 38) in the central cavity (30) of the roller cutter (28). The roll...	11/13/1990
4871401	Fluidized bed method of forming a nitride or carbonitride layer A method of forming a nitride or carbonitride layer on the surface of an iron or iron alloy article, which comprises the steps of: (a) disposing in a fluidized bed furnace a treating agent comprising a refractory powder, a metal powder of at least one sel...	10/03/1989
4858294	Method of producing an object, in particular a rolling bearing, consisting of at least two moving parts locked into each other A method of producing an object of at least two parts movable relative to each other, one of which parts is essentially locked inside the other, and wherein a rolling bearing is disposed, between the two parts in races, which includes at least one row of ...	08/22/1989
4719074	Metal-ceramic composite article and a method of producing the same A metal-ceramic composite article produced by fitting a projection formed on a ceramic member into a hole formed in a metallic member having a hardened region and an unhardened region on its surface such that the ceramic member is monolithically bonded to...	01/12/1988
4719075	Metal-ceramic composite article and a process for manufacturing the same Disclosed herein is a metal-ceramic composite article which includes a metallic member made of a precipitation hardenable alloy and a ceramic member, wherein a projection of the ceramic member is fitted into a hole or a through hole formed in the metallic...	01/12/1988

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Class 148/212 - Nitriding