With Noncarburizing Or Non-nitriding Reactive Coating (e.g., Oxidizing, Siliconizing, Boronizing, Etc.) Patents (Class 148/217)
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Patent number: 11396692Abstract: The invention describes a method of heat-treating an article, which includes a first step of heating the article to a temperature of 400° C. to 500° C. at a pressure of 1 to 3 millibar in an atmosphere comprising hydrogen for a period of 0.1 to 50 hours to produce a hot article, a second step of heating the hot article at a temperature of 400° C. to 500° C. at a pressure of 1 to 3 millibar in an atmosphere comprising at least one of hydrogen, argon, and nitrogen, for 0.1 to 50 hours to produce a preliminary heat treated article, and a third step of heating the preliminary heat treated article at a temperature of 400° C. to 500° C. at a pressure of 1 to 3 millibar in an atmosphere comprising at least one of hydrogen, nitrogen, and a hydrocarbon gas, for 0.1 to 50 hours; to produce a heat-treated article.Type: GrantFiled: April 10, 2019Date of Patent: July 26, 2022Assignee: FLUID CONTROLS PRIVATE LIMITEDInventors: Tansen Dhananjay Chaudhari, Rahul Manikrao Patil
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Patent number: 11371414Abstract: Provided is an exhaust system for an engine in which a fastening force of a fastener hardly decreases. An exhaust system for an engine includes: an exhaust passage component of ferrous metal; and a fastener that fastens the exhaust passage component to other parts, the exhaust passage component including a pressure receiving surface that receives a fastening force of the fastener. The oxide film of triiron tetraoxide is formed on the pressure receiving surface of the exhaust passage component. It is preferable that the oxide film of triiron tetraoxide be also formed on an outer surface other than the pressure receiving surface of the exhaust passage component. It is preferable that the oxide film of triiron tetraoxide be also formed on an inner surface of the exhaust passage component.Type: GrantFiled: April 24, 2020Date of Patent: June 28, 2022Assignee: KUBOTA CORPORATIONInventors: Hiroki Oso, Nobuyoshi Okada, Hideyuki Koyama, Yoshinori Tanaka, Kenji Okamoto
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Patent number: 10883153Abstract: In a manufacturing method for a sliding member, a nitrogen diffusion layer, a nitrogen compound layer, and an oxidation layer are formed by executing a first step of cooling a workpiece formed of a steel material after heating the workpiece in an atmosphere containing ammonia at 570 to 660° C., a second step of performing, subsequently to the first step, tempering while pressurizing a front surface side of the workpiece, and a third step of performing, subsequently to the second step, steam treatment of heating the workpiece in a steam atmosphere.Type: GrantFiled: May 26, 2016Date of Patent: January 5, 2021Assignee: JTEKT CORPORATIONInventors: Kazutaka Matsukawa, Hiroyuki Ando, Yasunari Saito, Hideyuki Saito, Kazuhiro Fukushima, Tomoyuki Nanba
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Patent number: 10870910Abstract: A number of variations may include a ferritic nitrocarburized part comprising steel, wherein the ferritic nitrocarburized steel has a tensile strength exceeding the parent steel material and sufficient ductility, bendability, and flangeability to support subsequent flanging and press-fitting of bushings. Exact strength increases and bendability will be dependent on exact process and alloy combinations.Type: GrantFiled: January 10, 2018Date of Patent: December 22, 2020Assignees: GM Global Technology Operations LLC, Woodworth Inc.Inventors: Michael L. Holly, Dennis Deciechi, James J. Gentile, David M. Cummings, Charles M. Enloe
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Patent number: 10847289Abstract: An article for magnetic heat exchange includes a functionally-graded monolithic sintered working component including La1-aRa(Fe1-x-yTyMx)13HzCb with a NaZn13-type structure. M is one or more of the elements from the group consisting of Si and Al, T is one or more of the elements from the group consisting of Mn, Co, Ni, Ti, V and Cr and R is one or more of the elements from the group consisting of Ce, Nd, Y and Pr. A content of the one or more elements T and R, if present, a C content, if present, and a content of M varies in a working direction of the working component and provides a functionally-graded Curie temperature. The functionally-graded Curie temperature monotonically decreases or monotonically increases in the working direction of the working component.Type: GrantFiled: April 24, 2018Date of Patent: November 24, 2020Assignee: VACUUMSCHMELZE GMBH & CO. KGInventors: Matthias Katter, Alexander Barcza, Volker Zellmann
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Patent number: 10538835Abstract: Provided herein are variably flexible (i.e., variably stiff) metal alloys and methods of making the variably flexible (i.e., variably stiff) metal alloys. A variably flexible (i.e., variably stiff) metal alloy is a metal alloy that has areas of differing flexibility (i.e., stiffness, rigidity or elasticity) along a length of the metal alloy when the metal alloy is subjected to a load in use. Also provided herein are methods of making variably flexible (i.e., variably stiff) metal alloys and products including casting a metal alloy and selectively heat treating portions of the metal alloy to achieve predetermined stiffnesses in those portions.Type: GrantFiled: June 5, 2018Date of Patent: January 21, 2020Assignee: Adallo LLCInventors: Ji Ma, Ibrahim Karaman, Eric Flickinger
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Patent number: 10519532Abstract: A steel material of the disclosure has a chemical composition containing, in mass %: 0.03% to 0.3% C; 0.03% to 1.0% Si; 0.1% to 2.0% Mn; 0.003% to 0.03% P; 0.005% or less S; 0.005% to 0.1% Al; 0.005% to 0.5% Cu; 0.01% to 0.5% Sb; and 0.005% to 0.5% Ni, with a balance being Fe and incidental impurities. Thus, the steel material has excellent alcohol-induced pitting corrosion resistance and alcohol-induced SCC resistance, and can be used for large structures with no need for coating, inhibitor addition, or the like by improving the pitting corrosion resistance and SCC resistance of the steel material itself.Type: GrantFiled: December 5, 2014Date of Patent: December 31, 2019Assignee: JFE STEEL CORPORATIONInventors: Itaru Samusawa, Kazuhiko Shiotani
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Patent number: 10436268Abstract: A method of manufacturing a brake disk made of gray cast iron is disclosed. The method includes casting a disk body using gray cast iron containing 3.1 wt % to 3.7 wt % of C; machining a surface of the cast disk body; nitriding the disk body by exposing the machined surface to a temperature in the range of 540° C. to 580° C. for 50 min to 70 min, and coating the nitrided disk body.Type: GrantFiled: March 13, 2019Date of Patent: October 8, 2019Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Min Gyun Chung, Yoon Cheol Kim, Yoon Joo Rhee, Byung Chan Lee, Jae Young Lee
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Patent number: 10274031Abstract: A method of manufacturing a brake disk made of gray cast iron is disclosed. The method includes casting a disk body using gray cast iron containing 3.1 wt % to 3.7 wt % of C; machining a surface of the cast disk body; nitriding the disk body by exposing the machined surface to a temperature in the range of 540° C. to 580° C. for 50 min to 70 min, and coating the nitrided disk body.Type: GrantFiled: April 26, 2018Date of Patent: April 30, 2019Assignees: HYUNDAI MOTOR COMPANY, KIA Motors CorporationInventors: Min Gyun Chung, Yoon Cheol Kim, Yoon Joo Rhee, Byung Chan Lee, Jae Young Lee
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Patent number: 10167858Abstract: Disclosed herein is a double-headed swash type compressor, and a distance between an outer peripheral surface of a shaft (20) and an inner peripheral surface of a shaft bore (11) is greater than a distance between the outer peripheral surface of the shaft (20) and an inner peripheral surface of a journal bearing (30).Type: GrantFiled: May 22, 2015Date of Patent: January 1, 2019Assignee: HANON SYSTEMSInventors: Min Gyu Kim, Seung Yong Hwang, Sang Ho Kim, Duck Bin Yoon
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Patent number: 10047429Abstract: Provided is a gas nitrocarburizing method forming a nitride layer in a surface layer portion of a workpiece made of steel by heating the workpiece within a heat treatment furnace into which a heat treatment gas is introduced, the heat treatment gas containing ammonia gas and at least one of carbon dioxide gas and hydrogen gas, and having a remainder formed of an impurity.Type: GrantFiled: April 9, 2012Date of Patent: August 14, 2018Assignee: NTN CORPORATIONInventor: Chikara Ohki
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Patent number: 9541144Abstract: A vehicular disc brake rotor is provided with a cast-iron base, a nitrogen diffusion layer formed on the cast-iron base, a nitrogen compound layer formed on the nitrogen diffusion layer, and an iron oxide layer including Fe3O4 and formed on the nitrogen compound layer. In a burnish and a first re-burnish of a “Passenger car-Braking device-Dynamometer test procedures” (which is based on JASO C 406:2000), a change ratio of a frictional coefficient between the burnish and the first re-burnish is 10% or less.Type: GrantFiled: August 29, 2013Date of Patent: January 10, 2017Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.Inventors: Yoshiyuki Sugai, Katsuji Seki, Takuya Takada
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Patent number: 9127342Abstract: Disclosed herein is a high-strength transmission gear, manufactured by gas-nitriding a nitriding steel having a composition including iron (Fe) as a main component, 0.25˜0.40 wt % of carbon (C), 0.50˜1.0 wt % of manganese (Mn), 2.0˜3.0 wt % of chromium (Cr), 0.3˜1.0 wt % of molybdenum (Mo), 0.2˜0.7 wt % of copper (Cu), 0.03˜0.1 wt % of niobium (Nb), 0.03˜0.1 wt % of aluminum (Al), 0.05˜0.15 wt % of vanadium (V), 0.001˜0.005 wt % of boron (B) and other inevitable impurities. More specifically, while gas-nitriding of the nitriding steel, the temperature is increased in steps, and the ratio of nitrogen gas in the nitriding steel is decreased in steps.Type: GrantFiled: March 21, 2013Date of Patent: September 8, 2015Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Jae Hong Park, Bong Lae Jo
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Patent number: 8986465Abstract: A piston ring comprising upper face, a lower face, an inner perimeter wall, and an outer perimeter wall that extends around the piston ring from the upper face to the lower face, where the outer perimeter wall has upper corner region disposed adjacent the upper face, a lower corner region disposed adjacent the lower face, and a band of a nitrided conversion layer extending between the upper corner region and the lower corner region, and where a PVD nitride layer is disposed on the upper corner region and on the lower corner region.Type: GrantFiled: January 15, 2013Date of Patent: March 24, 2015Assignee: Mahle Industries Inc.Inventor: John C. Lahrman
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PISTON RING WITH CHROMIUM SOLID PARTICLE WEAR-PREVENTION LAYER AND CORROSION-RESISTANT FLANK SURFACE
Publication number: 20150054222Abstract: A coated piston ring having a base body of chromium steel with more than 10 wt.-% chromium and having an inner circumferential surface, a first flank surface, a second flank surface and an outer circumferential surface. The first flank surface comprises a nitride diffusion layer with a layer thickness of from 5-300 ?m, a nitride connecting layer with a layer thickness of from 0.5-15 ?m on the nitride diffusion layer, and an oxide layer with a layer thickness of from 0.05-3 ?m on the nitride connecting layer. The second flank surface comprises the nitride diffusion layer, and the outer circumferential surface comprises the nitride diffusion layer and a chromium solid particle layer with 0.1-30 vol.-% solid particles, relative to the total volume of the chromium solid particle layer on the nitride diffusion layer.Type: ApplicationFiled: December 7, 2012Publication date: February 26, 2015Inventors: Christian Herbst-Dederichs, Waldemar Urbatzka, Stefan Dürdoth, Peter-Klaus Esser -
Patent number: 8951402Abstract: A method of ultra-fast boriding of a metal surface. The method includes the step of providing a metal component, providing a molten electrolyte having boron components therein, providing an electrochemical boriding system including an induction furnace, operating the induction furnace to establish a high temperature for the molten electrolyte, and boriding the metal surface to achieve a boride layer on the metal surface.Type: GrantFiled: November 1, 2012Date of Patent: February 10, 2015Assignee: UChicago Argonne, LLCInventors: Servet Timur, Guldem Kartal, Osman L. Eryilmaz, Ali Erdemir
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Patent number: 8900377Abstract: Use of a boron holding grease or fluid or oil for the purpose of increasing acid resistance and/or corrosion resistance in at least one metallic component of a flexible pipe body.Type: GrantFiled: August 14, 2009Date of Patent: December 2, 2014Assignee: GE Oil & Gas UK LimitedInventor: Geoffrey Stephen Graham
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Publication number: 20140338795Abstract: The invention relates to a method for manufacturing a titanium alloy having superelastic properties and/or shape memory for biomedical use, which comprises the steps of: preparing an ingot by melting the various metals that form the desired alloy in a vacuum; optionally homogenizing the ingot in a vacuum by high-temperature annealing (higher than 900° C.); first quenching; mechanical shaping (rolling, drawing, machining or the like); heat treatment for redissolution in beta phase beyond the beta transus temperature (until a second temperature and then maintaining same for a certain time); and second quenching; characterized in that said heat treatment phase is carried out in a gaseous atmosphere and also constitutes a surface treatment suitable for forming on the surface a layer of nitride, carbonitride, oxide, oxynitride or the like.Type: ApplicationFiled: November 7, 2012Publication date: November 20, 2014Applicant: INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE RENNESInventors: Thierry Gloriant, Doina Gordin
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Patent number: 8815023Abstract: Embodiments of the disclosed technology provide methods of boronizing titanium and other metals and metal alloys. The method proceeds, in an embodiment of the disclosed technology, by using a boron source, and placing it in a heated environment, followed by a reduced pressure environment, as is described in the disclosure. In a solid phase embodiment of the disclosure, boronized stainless steel alloys are produced having zero galling at 17,000 psi.Type: GrantFiled: April 19, 2012Date of Patent: August 26, 2014Assignee: Universal Global Products, LLCInventors: Svetoslav Zlatev, Roumiana Petrova
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Patent number: 8771438Abstract: Disclosed is a plasma nitriding surface treatment method for a gray cast iron part. In the plasma nitriding surface treatment method, a nitride layer is formed on a surface of the gray cast iron part by a selective ion nitriding treatment. The plasma nitriding surface treatment method is carried out such that the surface of the gray cast iron part is prevented from being deformed, and a reduction of the frictional coefficient of the part is prevented.Type: GrantFiled: September 13, 2012Date of Patent: July 8, 2014Assignee: Hyundai Motor CompanyInventors: Jae Young Lee, Seong Jin Kim, Jai Min Han, Yoon Cheol Kim, Hyun Dal Park
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Patent number: 8747573Abstract: The invention relates to a method for producing corrosion-resistant surfaces of nitrated or nitrocarburated steel components, the surfaces having roughness heights (Rz) of Rz?1.5 ?m. The method comprises the following steps: oxidation of the surfaces of the nitrated or nitrocarburated components in a first oxidation step; carrying out at least a second oxidation of the component surfaces in an immediately subsequent oxidation step; polishing the component surface in a final method step, directly after the final oxidation.Type: GrantFiled: October 29, 2008Date of Patent: June 10, 2014Assignee: Durferrit GmbHInventor: Ulrich Baudis
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Patent number: 8734603Abstract: The invention relates to a method for producing a friction element (3) comprising the steps: providing a metal main body (10), hardening the main body (10) on at least part of its surface (11, 12) in a salt bath, wherein the salt bath hardening is the final method step, and no further processing of the hardened surface (11, 12) is performed. Furthermore, the invention relates to a friction element produced according to this method and a friction component comprising the latter.Type: GrantFiled: December 1, 2011Date of Patent: May 27, 2014Assignee: Miba Frictec GmbHInventors: Zisis Tsioptsias, Gerhard Hartner
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Publication number: 20140102592Abstract: To provide a steel product excelling in both corrosion resistance and adhesion. A steel product having a nitride layer and a nitrogen diffused layer formed on the surface of a steel base material is provided. The nitride layer includes a first compound layer formed on a nitrogen diffused layer side and a second compound layer formed on a surface side of the first compound layer. The first compound layer has an ?-structure mainly made of Fe3N, and the second compound layer has a higher nitrogen concentration than the first compound layer and has a concavoconvex formed on the surface thereof. Thus, the nitride layer having excellent adhesion, an extremely small carbon containing amount, and high corrosion resistance can be formed.Type: ApplicationFiled: April 19, 2012Publication date: April 17, 2014Inventors: Koji Nishikawa, Hisao Fujikawa, Takanori Watanabe, Hideaki Iwamura, Morihiro Fujita
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Publication number: 20140060983Abstract: A vehicular disc brake rotor is provided with a cast-iron base, a nitrogen diffusion layer formed on the cast-iron base, a nitrogen compound layer formed on the nitrogen diffusion layer, and an iron oxide layer including Fe3O4 and formed on the nitrogen compound layer. In a burnish and a first re-burnish of a “Passenger car-Braking device-Dynamometer test procedures” (which is based on JASO C 406:2000), a change ratio of a frictional coefficient between the burnish and the first re-burnish is 10% or less.Type: ApplicationFiled: August 29, 2013Publication date: March 6, 2014Applicant: Akebono Brake Industry Co., LtdInventors: Yoshiyuki SUGAI, Katsuji SEKI, Takuya TAKADA
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Publication number: 20140060704Abstract: A cast-iron friction member is manufactured by: performing a nitrocarburizing treatment on a cast workpiece at a treatment temperature of 500° C. to 600° C. to thus form a nitrogen compound layer on a surface of the workpiece; and exposing the workpiece to an atmosphere when a temperature becomes 400° C. to 480° C. after the nitrocarburizing treatment so as to cool the workpiece to a room temperature while keeping a contact state with oxygen to thus form an iron oxide layer including Fe3O4 on a surface of the nitrogen compound layer.Type: ApplicationFiled: August 29, 2013Publication date: March 6, 2014Applicant: AKEBOND BRAKE INDUSTRY CO., LTD.Inventors: Yoshiyuki SUGAI, Katsuji SEKI, Takuya TAKADA
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Publication number: 20140048179Abstract: A method of manufacturing a machine component includes the steps of: preparing a member made of steel; forming a film containing vanadium at a surface by subjecting the member to oxidation; and forming a nitrogen-enriched layer by heating the member having the film formed in a heat treatment gas atmosphere containing nitrogen gas and absent of ammonia gas for carbonitriding.Type: ApplicationFiled: April 25, 2012Publication date: February 20, 2014Applicant: NTN CORPORATIONInventors: Takumi Fujita, Kazuhiro Yagita
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Publication number: 20130284318Abstract: Disclosed is a plasma nitriding surface treatment method for a gray cast iron part. In the plasma nitriding surface treatment method, a nitride layer is formed on a surface of the gray cast iron part by a selective ion nitriding treatment. The plasma nitriding surface treatment method is carried out such that the surface of the gray cast iron part is prevented from being deformed, and a reduction of the frictional coefficient of the part is prevented.Type: ApplicationFiled: September 13, 2012Publication date: October 31, 2013Applicant: HYUNDAI MOTOR COMPANYInventors: Jae Young Lee, Seong Jin Kim, Jai Min Han, Yoon Cheol Kim, Hyun Dal Park
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Patent number: 8545642Abstract: Providing an iron and steel material having quenched surface part, avoiding oxidation of a compound layer formed on the surface of the iron and steel material due to quenching, its production method, and an induction-quenched component. A quenched iron and steel material 10 comprises an iron and steel material 11, a compound layer 12 formed on the iron and steel material 11, and an antioxidant cover layer 13 formed on the compound layer 12. The iron and steel material 11 has a hardened layer having a given depth, and the surface of the iron and steel material 11 has enhanced hardness.Type: GrantFiled: May 19, 2009Date of Patent: October 1, 2013Assignees: Neturen Co., Ltd., Nihon Parkerizing Co., Ltd.Inventors: Kengo Fukazawa, Yoshitaka Misaka, Kazuhiro Kawasaki, Yoshihiro Ikeda, Masaaki Beppu, Arata Suda
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Patent number: 8512483Abstract: The present invention relates to a method for manufacturing an implant, in particular an intraluminal endoprosthesis, having a body containing metallic material, preferably iron. For controlling the degradation of the implant the method includes the following steps: (a) providing a first part of the implant body; and (b) performing heat treatment which alters the carbon content and/or the boron content and/or the nitrogen content in the structure of a near-surface boundary layer in the first part of the implant body in such a way that strain on the lattice or a lattice transformation, optionally following a subsequent mechanical load, is achieved in the near-surface boundary layer. Such an implant is also described.Type: GrantFiled: July 14, 2010Date of Patent: August 20, 2013Assignee: BIOTRONIK VI Patent AGInventors: Ullrich Bayer, Bodo Gerold
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Publication number: 20130206284Abstract: A method for producing a steel component with a metallic anti-corrosion coating from a sheet steel product comprising at least 0.4% by weight Mn is disclosed. The sheet steel product is annealed in a continuous furnace under an annealing atmosphere containing up to 25% by volume H2, 0.1% to 10% by volume NH3, H2O, N2, and process-related impurities as the remainder, at a dew point between ?50° C. and ?5° C. at a temperature of 400 to 1100° C. for 5 to 600 s. The annealed sheet steel product has a 5 to 200 ?m thick nitration layer with a particle size finer than the particle size of the inner core layer. Once coated with a metallic protective layer, a blank is separated from the annealed sheet steel product, heated to an austenitising temperature of 780 to 950° C., hot-formed, and cooled so that a hardened structure forms.Type: ApplicationFiled: June 14, 2011Publication date: August 15, 2013Applicant: THYSSENKRUPP STEEL EUROPE AGInventors: Martin Norden, Jens Kondrattuk, Manfred Meurer, Patrik Kuhn, Volker Marx, Horst Berndsen, Frank Friedel
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Publication number: 20120312425Abstract: The present invention provides a steel product for gas carburizing used for manufacturing a carburized steel part. In the above steel product for gas carburizing, a composition of a base metal contains, in mass %, C: 0.1 to 0.4%, Si: exceeding 1.2 to 4.0%, Mn: 0.2 to 3.0%, Cr: 0.5 to 5.0%, Al: 0.005 to 0.1%, S: 0.001 to 0.3%, N: 0.003 to 0.03%, and O: limited to 0.0050% or less, and P: limited to 0.025% or less, and when the contents of Si, Mn, and Cr (mass %) are set to [Si %], [Mn %], and [Cr %], Expression (1) below is satisfied, and an alloy shortage layer satisfying Expression (2) below exists in a range from its surface to 2 to 50 ?m in depth. 32?3.5[Si %]+[Mn %]+3[Cr %]>9??(1) 3.Type: ApplicationFiled: December 7, 2011Publication date: December 13, 2012Inventors: Tatsuya Koyama, Manabu Kubota
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Patent number: 8287667Abstract: Ferritic nitrocarburized surface treatment of cast iron brake rotors providing oxidation resistance, good braking performance and absence of distortion. Machined brake rotors are pre-heated, then immersed into a high temperature molten nitrocarburizing salt bath for a first predetermined dwell time. After removing the brake rotors from the nitrocarburizing salt bath, the brake rotors are directly immersed into an oxidizing salt bath at a lower temperature than the nitrocarburizing salt bath so that the brake rotors are thermally quenched. After a predetermined second dwell time in the oxidizing salt bath, the brake rotors are removed therefrom and further cooled to room temperature, either by water application thermal quenching or slow cooling in air. A fixture provides stable holding the brake rotors with a minimum of contact during placement in the salt baths.Type: GrantFiled: June 29, 2006Date of Patent: October 16, 2012Assignees: GM Global Technology Operations LLC, Kolene CorporationInventors: Michael L. Holly, Douglas N. Reed, James R. Easterday
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Patent number: 8268094Abstract: A gas injector including in which a gas is passed through high-voltage/low-current electrical discharges before being discharged into the chamber of a thermal treatment furnace. The electrical activation of the gas accelerates desirable reactions between the gas, gases in the furnace chamber, and the chamber workload. Preferably, a hot electrode is electrically charged and the other parts of the gas injector and the furnace are grounded. Also provided is a method for activating an atmosphere within the reaction chamber of a controlled-atmosphere reactor.Type: GrantFiled: May 1, 2008Date of Patent: September 18, 2012Assignee: Air Products and Chemicals, Inc.Inventors: Zbigniew Zurecki, Robert Ellsworth Knorr, Jr., John Lewis Green
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Patent number: 8231741Abstract: An internal combustion piston comprises a modified layer produced by a surface treatment including injecting injection powders having a diameter of 20 ?m to 400 ?m and containing a reinforcing element to be collided with a surface of the internal combustion piston obtained by casting and forging by injecting at an injection speed of 80 m/s or more or at an injection pressure of 0.3 MPa or more, the reinforcing element improving a strength of an alloy comprising the piston when being diffused and penetrated in the alloy, wherein by the surface treatment, oxides generated on the surface of the piston by the casting and forging are removed, and surface flaws generated on the surface are repaired, whereby the modified layer is formed to have a uniformly fine-grained metal microstructure which contains the reinforcing element in the injection powders diffused and penetrated in the vicinity of the surface of the piston and an alloy element of the alloy comprising the piston.Type: GrantFiled: May 10, 2010Date of Patent: July 31, 2012Assignees: Art Metal Mfg Co., Ltd., Fuji Kihan Co., Ltd.Inventors: Nobuyuki Fujiwara, Yoshio Miyasaka
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Patent number: 8187393Abstract: Embodiments of the disclosed technology provide methods of boronizing titanium and other metals and metal alloys. The method proceeds, in an embodiment of the disclosed technology, by using a boron source, and placing it in a heated environment, followed by a reduced pressure environment, as is described in the disclosure. In a solid phase embodiment of the disclosure, boronized stainless steel alloys are produced having zero galling at 17,000 psi.Type: GrantFiled: May 27, 2009Date of Patent: May 29, 2012Assignee: Universal Global Products, LLCInventors: Svetoslav Zlatev, Roumiana Petrova
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Patent number: 8172958Abstract: The present disclosure provides methods of making an improved composition and medical implant made therefrom. The methods generally comprise forming a ceramic layer, diffusion hardening, and optionally, forming another ceramic layer. The present disclosure provides methods of making an improved composition having a thick diffusion hardened zone and orthopedic implants comprising the improved composition.Type: GrantFiled: May 27, 2008Date of Patent: May 8, 2012Assignee: Smith & Nephew, Inc.Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
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Patent number: 8097357Abstract: A battery can of the present invention ensures a stable and favorable contact with an electrode and thus makes it possible to obtain a highly reliable battery excellent in high rate discharge characteristics. The battery can having an opening, including a cylindrical side portion and a bottom portion, of the present invention is formed from a steel plate. The steel plate has an Ni—Fe alloy layer on the inner face side of the battery can. The Ni—Fe alloy layer has an oxide layer containing iron and having a thickness of 10 to 50 nm on the inner face side of the battery can.Type: GrantFiled: June 20, 2006Date of Patent: January 17, 2012Assignees: Panasonic Corporation, Toyo Kohan Co., Ltd.Inventors: Katsuhiko Mori, Kouhei Kitagawa, Masatoshi Hano, Toru Morimoto, Hideo Omura, Tatsuo Tomomori, Masao Suda, Hitoshi Omura
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Publication number: 20110315275Abstract: A method for processing parts for kitchen tools in order to protect the parts from scratches, includes sequentially: a nitridation step, optionally including a nitrocarburizing step, between 592 and 750° C. in order to promote the formation of a nitrogen austenite layer; and a processing step for promoting the conversion of at least a portion of the nitrogen austenite into a phase with reinforced hardness.Type: ApplicationFiled: February 18, 2010Publication date: December 29, 2011Applicant: H.E.F.Inventors: Herve Chavanne, Philippe Maurin-Perrier
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Publication number: 20110094627Abstract: The present invention is directed to a method for protecting metal surfaces in oil & gas exploration and production, refinery and petrochemical process applications subject to solid particulate erosion at temperatures of up to 1000° C. The method includes the step of providing the metal surfaces in such applications with a hot erosion resistant cermet lining or insert, wherein the cermet lining or insert includes a) about 30 to about 95 vol % of a ceramic phase, and b) a metal binder phase, wherein the cermet lining or insert has a HEAT erosion resistance index of at least 5.0 and a K1C fracture toughness of at least 7.0 MPa-m1/2. The metal surfaces may also be provided with a hot erosion resistant cermet coating having a HEAT erosion resistance index of at least 5.0.Type: ApplicationFiled: October 26, 2010Publication date: April 28, 2011Applicant: ExxonMobil Research and Engineering CompanyInventors: John R. Peterson, Narasimha-Rao V. Bangaru, Robert Lee Antram, Christopher John Fowler, Neeraj S. Thirumalai, ChangMin Chun, Emery B. Lendvai-Lintner
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Publication number: 20110077732Abstract: The present invention relates to a method for manufacturing an implant, in particular an intraluminal endoprosthesis, having a body containing metallic material, preferably iron. For controlling the degradation of the implant the method includes the following steps: (a) providing a first part of the implant body; and (b) performing heat treatment which alters the carbon content and/or the boron content and/or the nitrogen content in the structure of a near-surface boundary layer in the first part of the implant body in such a way that strain on the lattice or a lattice transformation, optionally following a subsequent mechanical load, is achieved in the near-surface boundary layer. Such an implant is also described.Type: ApplicationFiled: July 14, 2010Publication date: March 31, 2011Applicant: BIOTRONIK VI PATENT AGInventors: Ullrich Bayer, Bodo Gerold
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Patent number: 7811390Abstract: A method for producing a carburized part by carburizing a steel member under a vacuum in a decompression furnace while feeding carburizing gas comprises a step for forming an oxide film on at least a part of a surface of the steel member, a step for generating carbon by reducing the oxide film with the carburizing gas, and a step for carburizing the surface of the steel member under a vacuum by diffusing the carbon.Type: GrantFiled: March 21, 2008Date of Patent: October 12, 2010Assignee: Honda Motor Co., Ltd.Inventors: Kazuo Ishii, Tatsumi Tanaka
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Patent number: 7806311Abstract: A method of manufacturing a ceramic/metal composite structure includes the steps of: performing a multi-stage pre-oxidizing process on the copper sheet; placing the copper sheet on a ceramic substrate; and heating the copper sheet and the ceramic substrate to a joining temperature to join the copper sheet and the ceramic substrate together to enhance interface strength between the copper sheet and the ceramic substrate according to the multi-stage pre-oxidizing process. The multi-stage pre-oxidizing process includes a first stage of pre-oxidizing process and a second stage of pre-oxidizing process, and the first and second stages of pre-oxidizing processes are performed in atmospheres with different oxygen partial pressures and at different temperatures.Type: GrantFiled: February 11, 2008Date of Patent: October 5, 2010Assignee: National Taiwan UniversityInventor: Wei-Hsing Tuan
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Patent number: 7767033Abstract: A method for surface treatment capable of easily improving a mechanical strength of an internal combustion piston at a reasonable cost is provided. A modified surface layer is formed by injecting injection powders containing a reinforcing element to be collided with an Al—Si alloy-based piston obtained by casting and forging by injecting under predetermined conditions, the reinforcing element being diffused and penetrated in the piston to improve the strength thereof. When a function, such as fuel modification, is imparted to the modified surface layer, an element exhibiting a photocatalytic function by oxidation, such as Ti, Sn, Zn, Zr, or W, is selected as the reinforcing element.Type: GrantFiled: July 18, 2007Date of Patent: August 3, 2010Assignees: Art Metal Mfg Co., Ltd., Fuji Kihan Co., Ltd.Inventors: Nobuyuki Fujiwara, Yoshio Miyasaka
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Publication number: 20090304500Abstract: A turbocharger includes a center housing having a bearing surface configured to contact an inner surface of a unison ring. A conversion coating is impregnated onto at least the bearing surface of the center housing.Type: ApplicationFiled: December 2, 2008Publication date: December 10, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Thomas A. Perry, Carnell E. Williams, Julian Velosa, Anil K. Sachdev
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Method for the production of wear-resistant sides for a keystone ring for internal combustion engine
Patent number: 7572344Abstract: 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, grinding the ring edges and the outer circumferential faces to give the required profile and brushing the inner circumferential face, grinding the upper and lower ring edge to form the keystone ring, complete nitriding of the piston ring surface by a gas-nitriding process (GNS) to form a nitride layer, profiling the nitrided piston ring by grinding and lapping without machining the nitrided edges of the piston ring, stacking the piston rings on the parallel faces, coating the outer circumferential faces of the piston rings with a wearing layer, and grinding the nitrided layer of the faces in the stacked state such that at most a quarter of the total thickness of the nitrided layer is removed.Type: GrantFiled: June 10, 2005Date of Patent: August 11, 2009Assignee: Mahle GmbHInventors: Kurt Maier, Jose Manoel Martins Leites, Nuno Machado -
Publication number: 20090194202Abstract: Disclosed is a novel process for producing an NaZn13 magnetic alloy which enables to obtain a magnetic alloy having higher characteristics than ever before. Specifically disclosed is a magnetic alloy represented by the following composition formula: (La1-xRx)a(A1-yTMy)bHcNd (wherein R represents at least one or more elements selected from rare earth elements including Y; A represents Si, or Si and at least one or more elements selected from the group consisting of Al, Ga, Ge and Sn; TM represents Fe, or Fe and at least one or more elements selected from the group consisting of Sc, Ti, V, Cr, Mn, Co, Ni, Cu and Zn; and x, y, a, b, c and d respectively satisfy, in atomic percent, the following relations: 0?x?0.2, 0.75?y?0.92, 5.5?a?7.5, 73?b?85, 1.7?c?14 and 0.07?d <5.0; with unavoidable impurities being included).Type: ApplicationFiled: April 4, 2006Publication date: August 6, 2009Applicant: HITACHI METALS, LTD.Inventor: Shigeho Tanigawa
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Patent number: 7524791Abstract: 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 resistance) and functions as a visible light responding photocatalyst, is provided. The surface of a substrate, which has at least a surface layer comprising titanium, a titanium alloy, a titanium alloy oxide, or titanium oxide, is heat-treated in a combustion gas atmosphere of a gas consisting essentially of a hydrocarbon, or in a gas atmosphere consisting essentially of a hydrocarbon, such that the surface temperature of the substrate is 900 to 1,500° C.; or a combustion flame of a gas consisting essentially of a hydrocarbon, is directly struck against the surface of the substrate for heat treatment such that the surface temperature of the substrate is 900 to 1,500° C., thereby forming a carbon-doped titanium oxide layer, whereby the substrate having the carbon-doped titanium oxide layer is obtained.Type: GrantFiled: December 8, 2004Date of Patent: April 28, 2009Assignee: Central Research Institute of Electric Power IndustryInventor: Masahiro Furuya
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Publication number: 20090014334Abstract: This invention involves the technical area of chemical plating in aluminum radiators, referring specifically to the partial chemical plating technique in the inner cavity of aluminum radiator. It undergoes the inner cavity shielding before zinc impregnation and continues chemical oxidization in other parts in the chemical the based on the existing oxidization trough, making the unshielded area unable to sediment a layer of zinc and be plated with nickel and phosphors alloy. Then, it is applied with enclosure technique. The chemical oxidization and enclosure enable the sections other than the inner cavity in the aluminum radiator to be covered with a layer of oxidization film against erosion from acid and alkali, so the sections covered with a oxidization film will not accumulate a layer of zinc nor be plated with nickel and phosphor alloy in the subsequent zinc impregnation and nickel plating. Only the surface of the inner cavity is plated with nickel and phosphor alloy.Type: ApplicationFiled: October 16, 2007Publication date: January 15, 2009Applicant: TWD METAL PRODUCTION CO., LTD.Inventors: Wenzhen Xie, Donglin Li
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Publication number: 20080283153Abstract: A gas injector including in which a gas is passed through high-voltage/low-current electrical discharges before being discharged into the chamber of a thermal treatment furnace. The electrical activation of the gas accelerates desirable reactions between the gas, gases in the furnace chamber, and the chamber workload. Preferably, a hot electrode is electrically charged and the other parts of the gas injector and the furnace are grounded.Type: ApplicationFiled: May 1, 2008Publication date: November 20, 2008Applicant: Air Products and Chemicals, Inc.Inventors: Zbigniew Zurecki, Robert Ellsworth Knorr, JR., John Lewis Green
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Publication number: 20080277030Abstract: Components, such as gears and other power transmission components, are formed by near-net-forging a high strength, high toughness ferrous metal alloy, surface processing metal alloy to form a hardened surface region (28), and coating the surface region with a lubricious coating (84) as shown in FIG. 9.Type: ApplicationFiled: December 13, 2005Publication date: November 13, 2008Applicant: United Technologies CorporationInventors: Clark V. Cooper, Raymond C. Benn, Bruce D. Hansen