Steel Member Patents (Class 228/262.41)
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Patent number: 11499271Abstract: A switch device including a switch rail (12), the switch device having at least one stock rail (14), a junction rail (32) and a switch rail support (16), and the switch rail and the connecting rail being interconnected by a weld joint (34). The switch rail support (16) includes a through-opening (36) or a recess beneath the weld joint, the width of the through-opening or the recess being wider than the width of the switch rail (12). Furthermore, the length of the through-opening or the recess allows the junction rail (32) to connect to switch rails of the same or different lengths.Type: GrantFiled: August 27, 2018Date of Patent: November 15, 2022Assignees: VOESTALPINE BWG GMBH, VOESTALPINE VAE GMBHInventors: Thomas Bergk, Thomas Christ, Jürgen Hellbach, Torsten Nolte
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Patent number: 9981346Abstract: Provided are a welded joint of extremely low-temperature steel and flux cored, submerged, and gas metal arc welding materials which can be used to prepare the welded joint, wherein the welded joint of extremely low-temperature steel has outstanding impact toughness in extremely low-temperature conditions and excellent yield strength at room temperature.Type: GrantFiled: November 22, 2013Date of Patent: May 29, 2018Assignee: POSCO Gyeongsangbuk-DoInventors: Il-Wook Han, Jeong-Kil Kim, Bong-Keun Lee, Hong-Kil Lee
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Publication number: 20150147111Abstract: The invention provides a hot stamped structural component (20) for an automotive vehicle, such as a B-pillar, including a first part (22) formed of a high strength steel material joined to a second part (24) formed of a high ductility steel material. The structural component (20) also includes a locally tempered transition zone (26) along the joint (28) to reduce the potential for failure along the joint (28). The transition zone (26) has strength and ductility levels between the strength and ductility levels of the remaining portions of the first and second parts (22, 24). The tempering step can be incorporated into a laser trimming cell or assembly cell, and thus the transition zone (26) can be created without adding an additional process step or increasing cycle time.Type: ApplicationFiled: November 17, 2014Publication date: May 28, 2015Inventor: RICHARD ALLEN TEAGUE
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Publication number: 20150090772Abstract: A method for joining materials such as metal alloys that includes a first component, wherein the first component includes a first alloy having a known austenization temperature below which martensite forms when the component is heated and then cooled at a predetermined rate of cooling; a second component, wherein the second component includes a second alloy; and a welding apparatus operative to create a weld between the first and second components without crossing the austenization temperature of the first alloy.Type: ApplicationFiled: December 9, 2014Publication date: April 2, 2015Inventor: David P. WORKMAN
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Patent number: 8820615Abstract: The invention concerns a method for manufacturing a steel component (6, 11) comprising a first steel part (7) and a second steel part (8), the first (7) and second (8) steel part having a carbon content up to 1.5 weight percent, The method is comprising: Heating (1), at least partly, the first steel part (7), and at least partly, the second steel part (8), to above the alpha/gamma transformation temperature, and joining (2) the first steel part (7) and the second steel part (8) by welding, the welding taking place at a temperature above the alpha/gamma transformation temperature, and cooling (3) such that hardening effects are avoided. The invention further concerns weld seams (9), welded steel components (6, 11), and bearing components (11, 15, 20, 22, 26, 27, 31).Type: GrantFiled: July 10, 2009Date of Patent: September 2, 2014Assignee: Aktiebolaget SKFInventors: Patrik Dahlman, John Van De Sanden
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Patent number: 8622094Abstract: A method for protecting a welded pipe assembly from metal dusting and a welded pipe assembly suitable for performing the method. The welded pipe assembly comprises two pipes, weld material joining the two pipes and insulating material. The pipes are protected from metal dusting by a protective coating. The present invention is useful for conveying gases comprising carbon monoxide at temperatures greater than 425° C. while preventing metal dusting of the welded piping assembly.Type: GrantFiled: August 5, 2011Date of Patent: January 7, 2014Assignee: Air Products and Chemicals, Inc.Inventors: Larry Thomas Dorsch, William Robert Licht, David R. Kerstetter
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Patent number: 8562759Abstract: Disclosed herein are iron-based alloys having a structure comprising fine-grained ferritic matrix and having a 60+ Rockwell C surface, wherein the ferritic matrix comprises <10 ?m Nb and W carbide precipitates. Also disclosed are methods of welding comprising forming a crack free hardbanding weld overlay coating with such an iron-based alloy. Also disclosed are methods of designing an alloy capable of forming a crack free hardbanding weld overlay, the methods comprising the step determining an amorphous forming epicenter composition, determining a variant composition having a predetermined change in constituent elements from the amorphous forming epicenter composition, and forming and analyzing an alloy having the variant composition.Type: GrantFiled: September 17, 2010Date of Patent: October 22, 2013Assignee: Scoperta, Inc.Inventors: Justin Lee Cheney, John Hamilton Madok
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Patent number: 8361254Abstract: Maraging steel compositions, methods of forming the same, and articles formed therefrom comprising, by weight, 15.0 to 20.0% Ni, 2.0 to 6.0% Mo, 3.0 to 8.0% Ti, up to 0.5% Al, the balance Fe and residual impurities. The composition may be a first layer of a composite plate, and may have a second layer deposited on the first layer, the second layer having a composition comprising, by weight, 15.0 to 20.0% Ni, 2.0 to 6.0% Mo, 1.0 to 3.0 Ti, up to 0.5% Al, the balance Fe and residual impurities. The first layer may have a hardness value ranging from 58 to 64 RC, and the second layer may have a hardness value ranging from 48 to 54 RC. The first layer may be formed employing powdered metallurgical techniques. Articles formed from the compositions include armored plate.Type: GrantFiled: June 8, 2011Date of Patent: January 29, 2013Assignee: ATI Properties, Inc.Inventors: Ronald E. Bailey, Thomas R. Parayil, Timothy M. Hackett, Tong C. Lee
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Patent number: 8337998Abstract: A joined body of dissimilar metals which is produced by joining a steel material and an aluminum alloy material, wherein the steel material to be joined has a specific composition and is specified in the compositions of outer surface oxide layer and inner oxide layer and the aluminum alloy material to be joined is an Al—Mg-base or Al—Zn—Mg-base aluminum alloy having a specific composition. In the joined body of dissimilar metals, a content of Fe at a joint interface on the aluminum alloy material side is regulated, and a reaction layer of Fe and Al is formed at the joint interface of the joined body of dissimilar metals. The joined body of dissimilar metals exhibits high joint strength.Type: GrantFiled: January 26, 2012Date of Patent: December 25, 2012Assignee: Kobe Steel, Ltd.Inventors: Mikako Takeda, Mamoru Nagao, Masao Kinefuchi
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Patent number: 8322592Abstract: Disclosed is an austenitic welding material which contains C: 0.01 wt % or less, Si: 0.5 wt % or less, Mn: 0.5 wt % or less, P: 0.005 wt % or less, S: 0.005 wt % or less, Ni: 15 to 40 wt %, Cr: 20 to 30 wt %, N: 0.01 wt % or less, O: 0.01 wt % or less, and the balance of Fe and inevitable impurities, wherein the content of B contained as one of the inevitable impurities in the welding material is 3 wt ppm or less, and the total content of C, P, S, N and O in the welding material is 0.02 wt % or less.Type: GrantFiled: December 16, 2009Date of Patent: December 4, 2012Assignees: Japan Atomic Energy Agency, Kobelco Research Institute, Inc., Kabushiki Kaisha Kobe Seiko ShoInventors: Kiyoshi Kiuchi, Ikuo Ioka, Chiaki Kato, Nobutoshi Maruyama, Ichiro Tsukatani, Makoto Tanabe, Jumpei Nakayama
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Patent number: 8317081Abstract: A reflow bonding method easily bonds first and second wiring members together by reflowing solder arranged on at least one of first and second bonding parts that are defined on the first and second wiring members, respectively. The method includes positioning the first and second wiring members so that the first and second bonding parts face each other with the solder interposed between them and heating and pressing one of the first and second bonding parts from behind with a pressing face of a heater chip so that the first and second bonding parts lie one on another and so that the solder is heated and reflows to bond the first and second wiring members together.Type: GrantFiled: October 19, 2010Date of Patent: November 27, 2012Assignee: NHK Spring Co., Ltd.Inventors: Shogo Ogaki, Takashi Ando, Masaru Inoue
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Patent number: 8309178Abstract: Provided are methods and initial structures for fabricating corrosion resistant steels that incorporate an aluminum rich corrosion resistant surface layer. The initial structures utilize layering and/or patterning for reducing the effective diffusion length Deff to a value well below the total thickness of the aluminum alloy protective layer X1 by providing vertical and/or lateral laminated structures that provide ready sources of Fe atoms during subsequent heat treatment processes.Type: GrantFiled: July 23, 2009Date of Patent: November 13, 2012Assignee: Honda Motor Co., Ltd.Inventors: Alan Seid, Masayuki Narita
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Publication number: 20120241053Abstract: In an intermediate piece for connecting molded articles of manganese steel with carbon steel, in particular austenitic manganese steel casting frogs with standard rails, the intermediate piece is comprised of steel from the group of austenitic-ferritic duplex steels having a ferrite portion of <60 wt %. The method for connecting austenitic manganese steel castings with standard rails is characterized in that an austenitic-ferritic intermediate piece made of duplex steel comprising <60% ferrite is welded with the manganese steel casting and the standard rail.Type: ApplicationFiled: June 6, 2012Publication date: September 27, 2012Applicants: VAE GmbH, VAE Eisenbahnsysteme GmbHInventor: Johannes BLUMAUER
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Patent number: 8221899Abstract: A joined body of dissimilar metals which is produced by joining a steel material and an aluminum alloy material, wherein the steel material to be joined has a specific composition and is specified in the compositions of outer surface oxide layer and inner oxide layer and the aluminum alloy material to be joined is an Al—Mg—Si-base aluminum alloy having a specific composition. In the joined body of dissimilar metals, a content of Fe at a joint interface on the aluminum alloy material side is regulated, and a reaction layer of Fe and Al is formed at the joint interface of the joined body of dissimilar metals. The joined body of dissimilar metals exhibits high joint strength.Type: GrantFiled: April 24, 2009Date of Patent: July 17, 2012Assignee: Kobe Steel, Ltd.Inventors: Mikako Takeda, Mamoru Nagao, Masao Kinefuchi
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Patent number: 8100313Abstract: A method for producing a stainless steel three-ply clad sheet for a fuel cell separator comprises heating a source blank and then performing rough rolling, hot rolling and cold rolling thereto, whereby the clad steel sheet for the fuel cell separator or a solid polymer type fuel cell separator thereby is obtained. The source blank for the clad steel sheet is composed of a stainless steel utilizing 0 to 0.3% B as a core component and a stainless steel containing 0.3 to 2.5% B as face component. The source blank is made using face components, a core component, tabs and protectors and performing steps including bonding of the tabs and protectors to the face components, removing portions of the tabs and protectors, piling of the face components to the core component, and further bonding of the face and core components together to form the source blank.Type: GrantFiled: March 14, 2008Date of Patent: January 24, 2012Assignee: Sumitomo Metal Industries, Ltd.Inventors: Motomichi Kanbe, Kunihiko Ushio, Takeo Yazawa, Hideaki Yamamoto, Yoshio Tarutani, Akira Seki
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Patent number: 8028889Abstract: A weld joins a thin overlay of low carbon steel to a base that contains high carbon steel, at least at its surface along which the weld is formed. The weld may be effected by fusion (melting) or by solid-state diffusion. With either it creates a heat affected zone (HAZ) in the base around the weld. The HAZ contains enough austenite, and perhaps bainite as well, to render the HAZ relatively ductile and also crack resistant. Adjacent to the weld the HAZ has a hardness that does not exceed 58 HRC. The weld may be produced with a high energy beam or with resistance welding equipment.Type: GrantFiled: August 12, 2009Date of Patent: October 4, 2011Assignee: The Timken CompanyInventor: David L. Milam
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Patent number: 8020749Abstract: According to a metal joining method of the present invention, first and second dissimilar metals are joined together by interposing between the first and second metal materials a third metal material dissimilar to the first and second metal materials and causing eutectic melting at least either at an interface between the first and third metal materials or at an interface between the second and third metal materials.Type: GrantFiled: November 11, 2010Date of Patent: September 20, 2011Assignees: Nissan Motor Co., Ltd., Kojiro KobayashiInventors: Kojiro Kobayashi, Akio Hirose, Shigeyuki Nakagawa, Kenji Miyamoto, Minoru Kasukawa, Masayuki Inoue, Tetsuji Morita
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Patent number: 7984840Abstract: According to a metal joining method of the present invention, first and second dissimilar metals are joined together by interposing between the first and second metal materials a third metal material dissimilar to the first and second metal materials and causing eutectic melting at least either at an interface between the first and third metal materials or at an interface between the second and third metal materials.Type: GrantFiled: November 11, 2010Date of Patent: July 26, 2011Assignees: Nissan Motor Co., Ltd.Inventors: Kojiro Kobayashi, Akio Hirose, Shigeyuki Nakagawa, Kenji Miyamoto, Minoru Kasukawa, Masayuki Inoue, Tetsuji Morita
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Publication number: 20110158572Abstract: The invention concerns a method for manufacturing a steel component (6, 11) comprising a first steel part (7) and a second steel part (8), the first (7) and second (8) steel part having a carbon content up to 1.5 weight percent, The method is comprising: Heating (1), at least partly, the first steel part (7), and at least partly, the second steel part (8), to above the alpha/gamma transformation temperature, and joining (2) the first steel part (7) and the second steel part (8) by welding, the welding taking place at a temperature above the alpha/gamma transformation temperature, and cooling (3) such that hardening effects are avoided. The invention further concerns weld seams (9), welded steel components (6, 11), and bearing components (11, 15, 20, 22, 26, 27, 31).Type: ApplicationFiled: July 10, 2009Publication date: June 30, 2011Inventors: Patrik Dahlman, John Van De Sanden
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Publication number: 20110100720Abstract: A drill pipe and a method of applying hardbanding thereto. A hardbanding alloy comprising iron and manganese present in the range of 67 to 87 weight percent (wt. %), niobium and chromium present in the range of 9 to 29 wt. %, and boron, carbon and silicon present in the range of 3 to 6.5 wt. % may be welded around at least a portion of a tool joint circumference. The hardbanding alloy may exhibit a hardness of 45 Rc to 70 Rc and a wear rate in the range of 0.08 grams to 1.60 grams of mass loss after 6,000 cycles as measured using ASTM G65-04, Procedure A.Type: ApplicationFiled: November 1, 2010Publication date: May 5, 2011Applicant: The NanoSteel Company, Inc.Inventors: Daniel James BRANAGAN, Brian E. MEACHAM, William D. KIILUNEN, James N. MILLOWAY, Brian D. MERKLE
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Patent number: 7896224Abstract: A method for raising a demagnetization temperature of a permanent magnet is disclosed. The method provides a ferromagnetic arrangement around the magnet to increase demagnetization thresholds for the duration of soldering, or any other process requiring high temperatures. Using the method disclosed, it is possible to apply high levels of heat directly to permanent magnets without demagnetization, and more particularly to create permanent magnetic assemblies fit for any environment.Type: GrantFiled: January 19, 2009Date of Patent: March 1, 2011Assignee: Cornell UniversityInventor: Alexander Temnykh
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Patent number: 7850059Abstract: According to a metal joining method of the present invention, first and second dissimilar metals are joined together by interposing between the first and second metal materials a third metal material dissimilar to the first and second metal materials and causing eutectic melting at least either at an interface between the first and third metal materials or at an interface between the second and third metal materials.Type: GrantFiled: December 13, 2005Date of Patent: December 14, 2010Assignees: Nissan Motor Co., Ltd.Inventors: Kojiro Kobayashi, Akio Hirose, Shigeyuki Nakagawa, Kenji Miyamoto, Minoru Kasukawa, Masayuki Inoue, Tetsuji Morita
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Patent number: 7798388Abstract: The present invention relates to a method of diffusion bonding of steel and steel alloys, to fabricate a fluid delivery system of the kind which would be useful in semiconductor processing and in other applications which require high purity fluid handling.Type: GrantFiled: May 31, 2007Date of Patent: September 21, 2010Assignee: Applied Materials, Inc.Inventors: Mark Crockett, John W. Lane, Vincent Kirchhoff, Marcel E. Josephson, Hong P. Gao, Bhaswan Manjunath
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Patent number: 7770779Abstract: A guide wire includes a wire member having a first wire disposed on the distal side of the guide wire, and a second wire disposed on the proximal side from the first wire. The second wire is made from a material having an elastic modulus larger than that of the first wire. For example, the first wire is made from a superelastic alloy, and the second wire is made from a stainless steel. The first wire is joined to the second wire at a welded portion by welding. A coil is disposed on the distal side from the first wire. A cover layer is formed on the outer peripheral surface of the wire member in such a manner as to cover at least the welded portion. The cover layer is made from a material capable of reducing the friction of the cover layer, for example, a fluorocarbon resin or a hydrophilic material, to thereby improve the sliding performance of the guide wire. Such a guide wire is excellent in operationality and kink resistance.Type: GrantFiled: June 26, 2009Date of Patent: August 10, 2010Assignee: Terumo Kabushiki KaishaInventors: Hiraku Murayama, Akihiko Umeno, Jun Iwami, Yutaka Itou, Youki Aimi
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Publication number: 20100098969Abstract: The invention provides a structural member of different materials having no different-material-bonded part between aluminum alloy material and steel material to be assembled. The structural member of different materials comprised of steel and aluminum alloy includes a first structural member including steel, and a second structural member having a part including steel and a part including aluminum alloy, the part including steel and the part including aluminum alloy being bonded by different-material bonding. The first structural member and the second structural member are bonded together only by bonding of steels between the part including steel of the second structural member and the first structural member.Type: ApplicationFiled: March 26, 2008Publication date: April 22, 2010Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.Inventors: Toru Hashimura, Koji Fukumoto, Naoto Takahashi
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Patent number: 7591407Abstract: An anchor for use interior of a carbon steel vessel, the anchor comprising a carbon steel anchor element and a carbon steel base, the anchor allowing welding of the base to the wall of the vessel without release of hexavalent chromium during installation. A method for installing a stainless steel anchor element to the interior wall of a carbon steel vessel, comprising welding the stainless steel anchor element to a carbon steel base in a ventilated environment exterior of the vessel interior and subsequently welding the carbon steel base to the vessel wall interior of the vessel.Type: GrantFiled: July 16, 2007Date of Patent: September 22, 2009Assignee: ASI Industrial Services, LLCInventor: Michael G. Williams
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Patent number: 7591410Abstract: In one embodiment, the present invention provides a method for welding together two metal pieces, comprising buttering a surface of a first metal piece with a first nickel-based filler metal at a thickness sufficient to isolate a heat-affected zone in the first metal piece from subsequent welding; heat-treating at least the heat-affected zone in the first metal piece; buttering a surface of a second metal piece with a second nickel-based filler metal having the same composition as the first nickel-based filler metal and at a thickness sufficient to isolate a heat-affected zone in the second metal piece from subsequent welding; heat-treating at least the heat-affected zone in the second metal piece; and welding the heat-treated first buttered surface to the heat-treated second buttered surface with a third nickel-based filler metal having the same composition as the first and second nickel-based filler metals.Type: GrantFiled: February 5, 2008Date of Patent: September 22, 2009Assignee: Electric Power Research Institute, Inc.Inventors: Kent K. Coleman, David Wayne Gandy, Ramaswamy Viswanathan
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Patent number: 7562807Abstract: Accordingly, the present invention provides a weld filler composition for joining different alloy steel pieces with substantially different chromium content, such as joining low alloy ferritic steel to high alloy ferritic steel, low alloy ferritic steel to austenitic stainless steel, or high alloy ferritic steel to austenitic stainless steel, and a method using the same. In one embodiment, the present invention provides a composition for a weld filler comprising nickel, iron, and chromium, which collectively comprise at least 50% by weight of the weld filler; niobium, carbon, manganese, molybdenum, and silicon, which collectively comprise no more than 50% by weight of the weld filler, and a niobium to carbon ratio of approximately 20 or less.Type: GrantFiled: May 5, 2004Date of Patent: July 21, 2009Assignee: Electric Power Research InstituteInventors: Kent K. Coleman, David Wayne Gandy, Ramaswamy Viswanathan, William F. Newell, Jr.
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Publication number: 20090045669Abstract: A compactor tip assembly for a landfill or soil compactor comprises a base and a tip that are formed from dissimilar materials. The tip may be formed from high carbon steel for wear resistance, while the base may be formed from low carbon steel for easy welding. The compactor tip assembly is attached to the compactor wheel by welding the base to the wheel. The tip and the base each have ground engaging surfaces which may be complementary to one another. A hollow pocket may be formed through the base and in the tip.Type: ApplicationFiled: August 24, 2007Publication date: February 19, 2009Inventors: James D. McPhail, Michael H. Hinrichsen
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Patent number: 7232053Abstract: The present invention provides seam-welded, air hardenable steel tubes, methods of manufacturing seam-welded air hardenable steel tubes, tube mills for practicing such methods and applications for using seam-welded, air hardenable steel tubing of the present invention.Type: GrantFiled: June 1, 2005Date of Patent: June 19, 2007Assignee: KVA, Inc.Inventor: Edward J. McCrink
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Patent number: 6872466Abstract: A method of plugging an area of damaged mesh in a sifting screen. The method is applicable to screens in which woven wire mesh is stretched, tensioned and secured over a supporting frame containing a plurality of windows and in which local damage to the mesh is in an area of the mesh which overlies one of the windows. The method has the steps of inserting into the window a device which is a close fit therein, and securing the device in the window so as to completely cover the area of damaged mesh. The device may be a former having stretched thereacross and secured thereto mesh similar to that stretched across the window in question, or simply a plate or block. The device may be secured in place by a force or interference fit, mechanical means, or adhesive, or the device may be resiliently deformable to allow it to be pushed past a projection in the window, so as to snap fit the device in place.Type: GrantFiled: July 8, 2002Date of Patent: March 29, 2005Assignee: United Wire LimitedInventors: Graham Robertson, Caspar Hassall
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Patent number: 6848609Abstract: In a method of making finned tubes as components of air-cooled systems or condensers, a sheet metal strip of aluminum is first shaped into a waved finned structure with plural fins in parallel relationship and arched ends for connecting the fins, thereby defining crests on opposite ends of the finned structure. A fluxing agent of cesium-aluminum tetrafluoride is applied in lines onto the crests on at least one of the ends of the finned structure. The finned structure is then placed upon a broad side of a flat steel tube coated with a zinc/aluminum alloy. The finned structure and the flat tube are subsequently joined in a brazing furnace in the presence of an inert gas at a temperature between 370° C. and 470° C. to produce a unitary structure which is then allowed to cool down at room temperature.Type: GrantFiled: December 16, 2003Date of Patent: February 1, 2005Assignee: GEA Energietechnik GmbHInventors: Benedict Korischem, Horia Dinulescu, Raimund Witte, Eckard Volkmer
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Patent number: 6793119Abstract: Process for welding duplex steel in the presence of a shielding gas without use being made of welding aids and with nitrogen being added to the shielding gas and with an austenitic-ferritic duplex steel with a chromium content of between 28 and 35 wt. % and a nickel content of between 3 and 10 wt. % being used.Type: GrantFiled: August 27, 2002Date of Patent: September 21, 2004Assignee: DSM IP Assets B.V.Inventors: Joseph Maria Gerardus Eijkenboom, Jozef Hubert Meessen, Hendrikus Catharina Guillaume Maria Schrijen
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Patent number: 6749002Abstract: The present invention relates to a method of providing a spray formed composite article. The method comprises providing a first article. The first article is a spray formed article. A second article is located adjacent the first article. Metallic particles are sprayed onto the articles and allowed to form a metal deposit that extends between and connects the first and second articles.Type: GrantFiled: October 21, 2002Date of Patent: June 15, 2004Assignee: Ford Motor CompanyInventors: Grigoriy Grinberg, Matthew M. Shade, David Robert Collins
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Patent number: 6715667Abstract: In a method for joining a steel tube with an aluminum rib, a zinc-aluminum alloy layer, having an aluminum content of 0.5% by wt. to 20% by wt., is applied to the surface of the steel tube or the aluminum rib, and then a fluxing agent in the form of cesium-aluminum tetrafluoride is applied between the steel tube and the aluminum rib at room temperature before or during the mechanical contact of the aluminum rib with the steel tube. The steel tube provided with the aluminum rib is then heated to a soldering temperature of between 370° C. and 470° C. and subjected to room temperature to cool down.Type: GrantFiled: July 22, 2002Date of Patent: April 6, 2004Assignee: GEA Energietechnik GmbHInventors: Benedict Korischem, Horia Dinulescu, Raimund Witte, Eckard Volkmer
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Patent number: 6713190Abstract: A method is described for making a reinforcing wire frame for embedding in a moulded polymer support frame over which woven wire cloth is to be stretched and secured to form a sifting screen. The method involves locating lengths of cut wire substantially equally spaced apart in a jig to form a first array. A second array of lengths of cut wire is located over the first array with the lengths of wire in the second array being substantially at right angles to those of the first array. The lengths of wire in the first and second arrays are resistance welded at points of mutual intersection so as to form a first substantially rectilinear matrix.Type: GrantFiled: March 13, 2002Date of Patent: March 30, 2004Assignee: United Wire LimitedInventors: Gordon James Cook, Andrew Hughes, Arthur Robert Bailey, George Charles Hartnup, Dugald Stewart
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Patent number: 6686061Abstract: A weldable structural steel product having fine complex precipitates of TiN and CuS is provided which contains, in terms of percent by weight, 0.03 to 0.17%C, 0.01 to 0.05% Si, 0.4 to 2.0% Mn, 0.005 to 0.2% Ti, 0.0005 to 0.1% Al, 0.008 to 0.030% N, 0.0003 to 0.01% B, 0.001 to 0.2% W, 0.1 to 1.5% Cu, at most 0.03% P, 0.003 to 0.05% S, at most 0.005% O, and balance Fe and incidental impurities while satisfying conditions of 1.2≦Ti/N≦2.5, 10≦N/B≦40, 2.5≦Al/N≦7, 6.5≦(Ti+2Al+4B)/N≦14, and 10≦Cu/S≦90, and having a microstructure essentially consisting of a complex structure of ferrite and pearlite having a grain size of 20 &mgr;m or less.Type: GrantFiled: July 16, 2002Date of Patent: February 3, 2004Assignee: PoscoInventors: Hong-Chul Jeong, Hae-Chang Choi
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Patent number: 6589671Abstract: A method for joining a first part to a second part wherein the first part comprises machine cast iron and the second part comprises case-hardened steel comprises abrading a surface on each of the parts which are to be welded together with a groove, fitting the abraded surfaces together to form a welding groove and high-energy beam welding within austenitic welding wire for joining the parts together.Type: GrantFiled: April 24, 2001Date of Patent: July 8, 2003Assignee: Steyr-Daimler-Puch Fahrzeugtechnik AG & Co. KGInventor: Oskar Kehrer
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Patent number: 6565678Abstract: Weld metals suitable for joining high strength, low alloy steels are provided. These weld metals have microstructures of acicular ferrite interspersed in a hard constituent, such as lath martensite, yield strengths of at least about 690 MPa (100 ksi), and DBTTs lower than about −50° C. (−58° F.) as measured by a Charpy energy versus temperature curve. These weld metals include about 0.04 wt % to about 0.08 wt % carbon; about 1.0 wt % to about 2.0 wt % manganese; about 0.2 wt % to about 0.7 wt % silicon; about 0.30 wt % to 0.80 wt % molybdenum; about 2.3 wt % to about 3.5 wt % nickel; about 0.0175 wt % to about 0.0400 wt % oxygen, and at least one additive selected from the group consisting of (i) up to about 0.04 wt % zirconium, and (ii) up to about 0.02 wt % titanium.Type: GrantFiled: August 2, 2001Date of Patent: May 20, 2003Assignee: ExxonMobil Upstream Research CompanyInventors: Douglas P. Fairchild, Jayoung Koo, Narasimha-Rao V. Bangaru, Mario Luis Macia, Danny Lee Beeson, Adnan Ozekcin
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Patent number: 6514631Abstract: A heating furnace tube, a method of using the same and a method of manufacturing the same which have been developed with a view to eliminating inconveniences occurring when a carbon-containing fluid is made to flow in the heating furnace tube. The heating furnace tube which comprises a rare earth oxide particle distributed iron alloy containing 17-26 wt. % of Cr and 2-6 wt. % of Al. The method of manufacturing this heating furnace tube which comprises the steps of forming or inserting an insert metal on or into at least one of a joint end portion of one heating furnace tube element and that of the other heating furnace tube element, bringing these two joint end portions into pressure contact with each other directly or via an intermediate member, and diffusion welding the two heating furnace tube elements to each other by heating the insert metal.Type: GrantFiled: May 1, 2000Date of Patent: February 4, 2003Assignee: JGC CorporationInventors: Katsumi Yamamoto, Takeo Murata, Rin Sasano, Kenji Sato, Toshikazu Nakamura, Muneyasu Ichimura, Kunio Ishii, Keizo Hosoya
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Patent number: 6378761Abstract: A process for joining or welding components made from case-hardened steel to one another or to components made from cast iron uses a nickel-containing filler. The components are not prepared for the welding operation, i.e., the components do not undergo at least partial abrasion of surfaces to be joined.Type: GrantFiled: March 19, 2001Date of Patent: April 30, 2002Assignee: DaimlerChrysler AGInventors: Tycho Eulenstein, Markus Kern, Rudolf Paasch, Bernd Schietinger
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Patent number: 6360936Abstract: In a method of manufacturing composite sheet steel of maraging steel, wherein the composite sheet steel comprises an outer layer and an inner layer, wherein the outer layer is harder than the inner layer and the inner layer is more tenacious than the outer layer, the steel of the inner layer is produced with a chemical composition containing in percent by weight: C≦0.01, Si≦0.1, Mn≦0.1, P≦0.005, S≦0.005, Cu≦0.1, Mo 4.80 to 5.20, Ni 17.5 to 18.5 , Cr≦0.1, Ti 0.55 to 0.70, Co 8.0 to 9.0; and the steel of the outer layer is produced with purification in a zone melting process with a chemical composition containing in percent by weight: C≦0.01, Si<0.1, Mn 0.02 to 0.20, P≦0.005, S≦0.005, Cu 0.01 to 0.20, Mo 4.80 to 5.20, Ni 17.5 to 18.5, Cr 0.01 to 0.20, Ti 1.80 to 1.95, Co 14.0 to 15.5, Al 0.05 to 0.15, with the remainder being Fe and contaminants resulting from the manufacturing process, respectively.Type: GrantFiled: September 26, 2000Date of Patent: March 26, 2002Assignee: Aktiengesellschaft der Dillinger HüttenwerkeInventors: Christoph Dilg, Uwe Hofmann, Claus Just, Hans-Jürgen Rögele, Helmut Schönberger, Jürgen Vogt
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Publication number: 20010030221Abstract: On a method of welding a high nitrogen containing stainless steel using, as a base metal, a high nitrogen stainless steel containing nitrogen at or above a solubility equilibrated with N2 at 1 atm when melted, a novel welding method keeping a weld metal composition from supersaturation of N in a molten state, having a sufficient corrosion resistance in an average composition of the weld metal under sea water circumstance and capable of maintaining mechanical characteristics and corrosion resistance comparable with those of a base metal is provided, wherein welding is conducted while setting a composition of a welding material and a dilution rate to be defined latter so as to satisfy the following two relations (A) and (B): 1 % ⁢ N p × D ≦ 0.028 × ( % ⁢ ⁢ Cr p × D + % ⁢ ⁢ Cr ′ × ( 1 - D ) ) + 0.Type: ApplicationFiled: January 8, 2001Publication date: October 18, 2001Inventors: Makoto Ogawa, Kazuo Hiraoka, Yasuyuki Katada, Hideki Uno, Chiaki Shiga
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Patent number: 6209777Abstract: A fusion welding method for binding the surfaces of two metals including the steps of (a) coating a layer of a powdery media capable of forming eutectics with both the two metals for lowering the melting points of the two metals, onto at least one of the binding surfaces of the two metal to be bound; and (b) sintering, in a vacuum furnace, the two metals with said powdery media being coated on their binding surfaces as produced in step (a) until the two metals are fused together by eutectic welding, and the sintering temperature being controlled at a temperature higher than the eutectic points of the two metals and the powdery medium, but lower than the melting points of the two metals.Type: GrantFiled: September 13, 1999Date of Patent: April 3, 2001Assignee: New Century Technology Co., Ltd.Inventors: Chao-nien Tung, Tien-tzu Chuang
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Patent number: 6193145Abstract: An end portion of each of two parts is machined and the machined end portion of the parts are arranged in facing positions to form a welding bevel extending in a longitudinal direction between the parts, whereafter a filler metal is deposited into the welding bevel. The welding bevel is a narrow bevel with side walls at an aperture angle of no more than 5° relative to the longitudinal central plane of the bevel. A nickel alloy comprising 18-32% of chromium is deposited into the welding bevel. The method is particularly suitable for joining a pressurized water nuclear reactor vessel tubing and an austenitic stainless steel primary circuit pipe.Type: GrantFiled: January 8, 1999Date of Patent: February 27, 2001Assignee: FramatomeInventors: Yves Fournier, Alain Peigney, Léon Dunand-Roux