Iron(fe) Or Iron Base Alloy Present Patents (Class 148/529)
  • Publication number: 20130000795
    Abstract: There is provided an amorphous core annealing method in which the annealing temperature distribution within an iron core is regulated so that deterioration in the magnetic properties, which is caused by unevenness of the annealing temperature within the core, can be suppressed, and the annealing time can be shortened. In order to regulate the annealing temperature distribution within the amorphous core at the annealing time, a heater functioning as a heat source is held between laminated thin-film amorphous materials of an iron core, and annealing is performed. By uniformly regulating the annealing conditions within the core, deterioration in the magnetic properties, which is caused by unevenness of annealing, can be suppressed to a minimum. Also, an iron core of a special specification, for example, a core having a low core loss, or a core having a high magnetroresistance, can be manufactured by using different annealing conditions within the iron core.
    Type: Application
    Filed: January 18, 2011
    Publication date: January 3, 2013
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventor: Kenji Nakanoue
  • Publication number: 20120280485
    Abstract: Methods for welding a first metal part to a second metal part by a solid state process to form a welded article having at least a welded region are provided herein. The welded region of the weld is post-weld aged by heating it to a set temperature for a set time and compressing the weld.
    Type: Application
    Filed: May 3, 2012
    Publication date: November 8, 2012
    Inventors: Israel Stol, Stephen Makosey, John Cobes, Daniel Bergstrom
  • Patent number: 8303739
    Abstract: Exemplary embodiments of the present invention can provide a method for producing hot dip galvannealed steel sheet which exhibits high strength, high ductility, and a significant degree of alloying. Such exemplary method can be applied to, e.g., a pickled hot rolled steel sheet or an annealed and pickled cold rolled steel sheet containing between about 0.02% and about 0.2% C and between about 0.15% and about 2.5% Mn, and may include one or more procedures for rinsing the sheet, preplating the sheet with Ni, rapidly heating the sheet in a nonoxidizing atmosphere to a sheet temperature of about 430° C. to 500° C., then hot dip plating the sheet in a galvanizing bath containing between about 0.05% and about 0.2% Al, and then immediately heating the sheet rapidly for an alloying treatment. Such exemplary method can provide an improved alloying speed, improved plating appearance and better plating adhesion.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: November 6, 2012
    Assignee: Nippon Steel Corporation
    Inventors: Kiyokazu Ishizuka, Kazumi Nishimura, Ikuo Kikuchi, Kaoru Kawasaki, Junji Haji
  • Publication number: 20120241053
    Abstract: 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: Application
    Filed: June 6, 2012
    Publication date: September 27, 2012
    Applicants: VAE GmbH, VAE Eisenbahnsysteme GmbH
    Inventor: Johannes BLUMAUER
  • Publication number: 20120211129
    Abstract: On at least one surface of a base metal plate (1) of an ?-? transforming Fe or Fe alloy, a metal layer (2) containing ferrite former is formed. Next, the base metal plate (1) and the metal layer (2) are heated to an A3 point of the Fe or the Fe alloy, whereby the ferrite former are diffused into the base metal plate (1) to form an alloy region (1b) in a ferrite phase in which an accumulation degree of {200} planes is 25% or more and an accumulation degree of {222} planes is 40% or less. Next, the base metal plate (1) is heated to a temperature higher than the A3 point of the Fe or the Fe alloy, whereby the accumulation degree of the {200} planes is increased and the accumulation degree of the {222} planes is decreased while the alloy region (11b) is maintained in the ferrite phase.
    Type: Application
    Filed: October 27, 2010
    Publication date: August 23, 2012
    Inventors: Tooru Inaguma, Miho Tomita, Youji Mizuhara, Hiroaki Sakamoto
  • Patent number: 8133332
    Abstract: A method includes: constructing a multilayer structure including a first layer of Pt, a first layer of A1 phase FePt on the first layer of Pt, and a second layer of Pt on the layer of FePt, and annealing the multilayer structure to convert the A1 phase FePt to L1o phase FePt.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: March 13, 2012
    Assignee: Seagate Technology LLC
    Inventors: Jiaoming Qiu, Yonghua Chen, Ganping Ju
  • Patent number: 8118989
    Abstract: Methods are provided for bonding pure rhenium to a substrate comprising a material. Non-lubricated components configured to have friction contact with another component are also provided. In an embodiment, by way of example only, a method includes disposing a eutectic alloy over the substrate to form an inter layer, the eutectic alloy comprised essentially of a base alloy and one or more melting point depressants and having a melting temperature that is lower than a melting temperature of the substrate material and a melting temperature of rhenium, placing pure rhenium over the inter layer, and heating the inter layer to a temperature that is substantially equal to or greater than the melting temperature of the eutectic alloy, but that is below the melting temperature of the substrate material and the melting temperature of the pure rhenium to bond the pure rhenium to the substrate.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: February 21, 2012
    Assignee: Honeywell International Inc.
    Inventors: Don Mittendorf, Scott Sperl
  • Patent number: 8070894
    Abstract: An alloy suitable for coating metal surfaces is provided in which the alloy provides a liquid melt which contains a fraction of dissolved oxide forming additives as deoxidizers. The alloyed combination of elements in the liquid melt resists compound formation thus preserving the chemical activity of the individual elements. In a coating application, the alloy may form a coating that can interact with and remove the oxide or residual oxide coating of the base metal to be coated, i.e., scrub the surface of the metal clean. This results in increased coating bond strength and the ability to bond effectively to normally difficult alloys such as stainless steel, refractory metals (W, Ti, Ta etc.), or aluminum alloys which form protective oxide layers.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: December 6, 2011
    Assignee: The NanoSteel Company, Inc.
    Inventor: Daniel James Branagan
  • Patent number: 8021497
    Abstract: The invention relates to a method for producing a hardened steel part having a cathodic corrosion protection, whereby a) a coating is applied to a sheet made of a hardenable steel alloy in a continuous coating process; b) the coating is essentially comprised of zinc; c) the coating additionally contains one or more oxygen-affine elements in a total amount of 0.1% by weight to 15% by weight with regard to the entire coating; d) the coated steel sheet is then, at least in partial areas and with the admission of atmospheric oxygen, brought to a temperature necessary for hardening and is heated until it undergoes a microstructural change necessary for hardening, whereby; e) a superficial skin is formed on the coating from an oxide of the oxygen-affine element(s), and; f) the sheet is shaped before or after heating, and; g) the sheet is cooled after sufficient heating, whereby the cooling rate is calculated in order to achieve a hardening of the sheet alloy.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: September 20, 2011
    Assignee: voestalpine Stahl GmbH
    Inventors: Martin Fleischanderl, Siegfried Kolnberger, Josef Faderl, Gerald Landl, Anna Elisabeth Raab, Werner Brandstätter
  • Patent number: 8007715
    Abstract: A steel has the following chemical composition (amounts in % by weight): 0.05-0.14 C, 8-13 Cr, 1-2.6 Ni, 0.5-1.9 Mo, 0.5-1.5 Mn, 0.15-0.5 Si, 0.2-0.4 V, 0-0.04 B, 2.1-4.0 Re, 0-0.07 Ta, 0-60 ppm Pd, remainder Fe and unavoidable impurities. The steel can be used effectively as a welding additive material and has outstanding properties at very high temperatures, in particular a good creep rupture strength/resistance and a good oxidation resistance.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: August 30, 2011
    Assignee: ALSTOM Technology Ltd.
    Inventors: Mohamed Nazmy, Paul Claus Gerdes, Andreas Kuenzler
  • Publication number: 20110048585
    Abstract: A heat treated galvannealed steel material having excellent post-painting corrosion resistance and a high strength which is suitable for use as an automotive part and a method for its manufacture are provided. A galvannealed steel material having a galvannealed coating on at least one side thereof is heat treated by heating at least a portion thereof to a temperature range in which hardening is possible. The coating remaining on the surface of at least a part of the portion which underwent heat treatment has a coating weight of at least 20 g/m2 and at most 80 g/m2 per side and an Fe content of at least 15% and at most 35%, an ? phase is present in the coating, and the centerline average roughness Ra of the surface of the coating is at most 1.5 ?m.
    Type: Application
    Filed: July 23, 2010
    Publication date: March 3, 2011
    Inventors: Tamotsu Toki, Atsushi Tomizawa, Nobusato Kojima, Kazuya Ishii, Kazuhito Imai, Toyomitsu Nakamura, Naoaki Shimada
  • Patent number: 7837810
    Abstract: Thermo-mechanical properties of welds in stainless steel is substantially improved by the implementation of a post weld heat treatment that illiminates sigma phase in the heat treated zone and favors niobium carbonitride precipitate formation in a desirable size range. In most cases, post weld heat treated material can be employed in pressurized devices at temperatures exceeding 550° C., which is currently regarded the upper safe temperature limit, and material according to the inventive subject matter was tested at temperature of up to 850° C. without reheat cracking.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: November 23, 2010
    Assignee: Fluor Technologies Corporation
    Inventors: Barry Messer, Terrell T. Phillips, Vasile Oprea
  • Publication number: 20100224288
    Abstract: 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: Application
    Filed: September 22, 2008
    Publication date: September 9, 2010
    Applicants: VAE EISENBAHNSYSTEME GMBH, VAE GMBH
    Inventor: Johannes Blumauer
  • Patent number: 7758925
    Abstract: A method for preparing a protective layer (38) on a surface of the substrate (36) that requires a bonding temperature (BT) above a detrimental phase transformation temperature range (28) of the substrate, and then cooling the layer and substrate without cracking the layer or detrimentally transforming the substrate. The protective layer (38) and the substrate (36) are cooled from the bonding temperature (BT) to a temperature (46) above the detrimental phase transformation range (28) at a first cooling rate (30) slow enough to avoid cracking the protective layer. Next, the protective layer and the substrate are cooled to a temperature below the detrimental phase transformation range of the substrate at a second cooling rate (27) fast enough to pass the detrimental phase transformation range before a substantial transformation of the substrate into the detrimental phase can occur.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: July 20, 2010
    Assignee: Siemens Energy, Inc.
    Inventor: Brij B. Seth
  • Patent number: 7695825
    Abstract: A circularly welded joint featuring excellent fatigue strength obtained by welding the ends of two pieces of steel plates perpendicularly together and used for the welded structures such as buildings, ships, bridges, construction machinery and off-shore structures, a method of producing the circularly welded joints and a welded structure using the circularly welded joints are provided. A circularly welded joint is obtained by welding the ends of two pieces of steel plates perpendicularly together. Between the two pieces of the steel plates, at least the steel plate on the side on which the main stress is exerted is one that suppresses the propagation of cracks due to fatigue and, preferably, one having the compressive residual stress in the surface layer of the steel plate.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: April 13, 2010
    Assignee: Nippon Steel Corporation
    Inventors: Kiyotaka Nakashima, Tadashi Ishikawa
  • Patent number: 7615124
    Abstract: A process for manufacturing plated-steel armor wires intended for reinforcement of flexible tubular pipes for transporting hydrocarbons, comprising a plating coating is intimately bonded, by high pressure, to a core made of hardenable steel with moderate mechanical properties, and then the plated wire obtained undergoes a rapid high-temperature hardening step followed by a tempering step.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: November 10, 2009
    Assignee: Technip France
    Inventors: Francois Dupoiron, Philippe Espinasse
  • Publication number: 20090211668
    Abstract: Exemplary embodiments of the present invention can provide a method for producing hot dip galvannealed steel sheet which exhibits high strength, high ductility, and a significant degree of alloying. Such exemplary method can be applied to, e.g., a pickled hot rolled steel sheet or an annealed and pickled cold rolled steel sheet containing between about 0.02% and about 0.2% C and between about 0.15% and about 2.5% Mn, and may include one or more procedures for rinsing the sheet, preplating the sheet with Ni, rapidly heating the sheet in a nonoxidizing atmosphere to a sheet temperature of about 430° C. to 500° C., then hot dip plating the sheet in a galvanizing bath containing between about 0.05% and about 0.2% Al, and then immediately heating the sheet rapidly for an alloying treatment. Such exemplary method can provide an improved alloying speed, improved plating appearance and better plating adhesion.
    Type: Application
    Filed: April 14, 2006
    Publication date: August 27, 2009
    Applicant: Nippon Steel Corporation
    Inventors: Kiyokazu Ishizuka, Kazumi Nishimura, Ikuo Kikuchi, Kaoru Kawasaki, Junji Haji
  • Publication number: 20090205755
    Abstract: Exemplary embodiments of a facility or an arrangement capable of producing a high strength steel sheet or a hot dip zinc coated high strength steel sheet according to the present invention are provided which can make a quenching facility and tempering facility continuous treatment facilities. For example, an improvement in the material quality can be effectuated due to tempering enable improvement of the hole expandability. In addition, an elongation of the sheet can be improved.
    Type: Application
    Filed: November 9, 2005
    Publication date: August 20, 2009
    Applicant: Nippon Steel Corporation
    Inventors: Hirokazu Taniguchi, Toshiki Nonaka, Hiroki Murayama, Koji Yanaba, Satoshi Kato
  • Publication number: 20090120535
    Abstract: The present invention provides a method of bonding steel members by bonding a plurality of steel members made of a Cr-containing steel material to each other. The method includes a united body forming step S10 in which a united body is formed by making the plurality of steel members butted to each other and by heating the plurality of steel members to a first temperature while pressing the plurality of steel members under a predetermined pressure condition; and a bonding strength enhancing step S30 in which the united body is heated to a second temperature equal to or above an A1 transformation point of the steel material and, subsequently, is gradually cooled to a third temperature equal to or below 600° C. under a condition that lowering of temperature to 600° C. from A1 transformation point takes 10 hours or more in this order.
    Type: Application
    Filed: March 16, 2006
    Publication date: May 14, 2009
    Applicant: MOLE'S ACT CO., LTD.
    Inventors: Toshiaki Kitazawa, Takayuki Fujimori
  • Publication number: 20090020191
    Abstract: Thermo-mechanical properties of welds in stainless steel is substantially improved by the implementation of a post weld heat treatment that iliminates sigma phase in the heat treated zone and favors niobium carbonitride precipitate formation in a desirable size range. In most cases, post weld heat treated material can be employed in pressurized devices at temperatures exceeding 550° C., which is currently regarded the upper safe temperature limit, and material according to the inventive subject matter was tested at temperature of up to 850° C. without reheat cracking.
    Type: Application
    Filed: June 16, 2004
    Publication date: January 22, 2009
    Inventors: Barry Messer, Terrell T. Phillips, Vasile Oprea
  • Publication number: 20080230155
    Abstract: A method of preparing a mechanical component with an Fe—Cr—C hardfacing weld overlay alloy for improving the resistance of the mechanical component to abrasion, erosion or erosion/corrosion for use in very abrasive, erosion or erosive/corrosive environments by significantly increasing the hardness of the weld overlay is disclosed. To improve the resistance to abrasion, erosion or corrosion, a weld overlay of a Fe—Cr—C hardfacing alloy is applied onto the surface of a metallic component, such as tubes, pipes, or vessels. Welding and cladding methods including gas-metal-arc welding (GMAW), gas-tungsten-arc welding (GTAW), and laser cladding may be utilized. Then, the component is heat-treated at elevated temperatures for a sufficient time, resulting in additional hardening and thus further increasing the weld overlay's resistance to abrasion, erosion, or erosion/corrosion.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 25, 2008
    Applicant: WELDING SERVICES INC.
    Inventor: George Ying-Dean Lai
  • Patent number: 7422241
    Abstract: A girder is described for a vehicle chassis made of at least two sheet metal profiles (4, 5) composed along their longitudinal edges into a circumferentially enclosed hollow profile (1), which hollow profile comprises at least two longitudinal sections (2, 3) which are both materially joined by way of a joining seam (10).
    Type: Grant
    Filed: June 22, 2004
    Date of Patent: September 9, 2008
    Assignee: voestalpine STAHL GmbH
    Inventors: Christian Schmaranzer, Alois Leitner
  • Patent number: 7371296
    Abstract: In a method and system for an improved annealing furnace cooling and purging, atmosphere injection jets are provided in close proximity to a bottom of a tray carrying a lamination product in a cooling section. Atmospheric extraction tubes are also provided extracting atmosphere which is delivered to a high temperature variable speed fan which then outputs at a pressure side atmosphere to tubes having the injection jets. The system may be retrofit into an existing annealing furnace already having water cooled finned tubes and a recirculation fan in the cooling section. Cooling water tubes and a recirculating fan may also be provided in a purge vestibule located after an output from the cooling section for additional cooling.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: May 13, 2008
    Assignee: Tempel Steel Company
    Inventors: Gwynne Johnston, Michael E. Kubis
  • Publication number: 20070269678
    Abstract: There is provided a high-tensile steel sheet containing 0.15 to 0.25 mass % of C, 0.1 to 2.0 mass % of Si, 0.10 to 1.0 mass % of Mn, 0.5 to 3.5 mass % of Cr, 0.02 mass % or less of P, 0.01 mass % or less of S and the balance being Fe and unavoidable impurities based on the total mass of the steel sheet and satisfying a content ratio of Mn/(Mn+Cr)<0.50.
    Type: Application
    Filed: May 16, 2007
    Publication date: November 22, 2007
    Inventors: Masamoto Ono, Hideyuki Sasaoka, Eizaburou Nakanishi, Yoshio Okada, Yoshiharu Michiura, Masaaki Takagi
  • Patent number: 7267732
    Abstract: There is provided a method for manufacturing steel parts for an automotive automatic transmission in which a desired joint portion of each steel part is copper-brazed at a high temperature while chromium in an alloy steel for machine structural use forming the steel part for an automotive automatic transmission is kept in a reducing atmosphere and without removal of carbon, and the part is successively reheated continuously with the copper brazing by utilizing residual heat at the time of copper brazing, by which the temperature of the part is increased to perform quench hardening. In the above-described manufacturing method, the heating treatment for copper brazing of the part and the heating treatment for quenching thereof are connected to each other via an intermediate cooling treatment in which the temperature of the part is decreased to a temperature below the Ar1 point, and these heating treatments are performed in an atmosphere of a neutral gas such as nitrogen gas supplied into a graphite muffle.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: September 11, 2007
    Assignees: NSK-Warner K.K., Kanto Yakin Kabushiki Kaisha
    Inventors: Hideharu Tsukamoto, Katsutoshi Yoshizawa, Hiroaki Yamashita
  • Patent number: 7241350
    Abstract: Diffusion metallic anticorrosive zinc-iron-aluminum coatings of iron and iron-based item surfaces, realized by heating of products at temperatures of 370–450° C. in a saturating powder mixture environment in a closed container. The coating compositions are multiphase-polymetallic, and comprise zinc, iron and aluminum. Other elements may be added to attain specific coating properties. This coating exhibits a high corrosion resistance (at least a 700-hour corrosion resistance level in a standard salt spray test), a relatively high hardness level and good adhesion to secondary coatings.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: July 10, 2007
    Assignee: Greenkote (Israel) Ltd.
    Inventor: Itzhak Rosenthul
  • Patent number: 7163754
    Abstract: A sprocket has a base steel member including an outer toothed profile surface, at least a portion of the outer toothed profile surface having a wear and corrosion resistant coating disposed thereon; the coating comprising an alloy, the alloy comprising at least 60 weight % iron, cobalt, nickel, or alloys thereof. A method of producing a wear and corrosion resistant sprocket includes: (i) machining a base steel member to form an outer toothed profile surface thereon; (ii) applying a coating to at least a portion of the surface; and (iii) fusing the coating to the base steel member.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: January 16, 2007
    Assignee: Deere & Company
    Inventors: Gopal S. Revankar, Timothy D. Wodrich, Todd B. Niemann
  • Patent number: 7067022
    Abstract: The invention includes a method of producing a hard metallic material by forming a mixture containing at least 55% iron and at least one of B, C, Si and P. The mixture is formed into an alloy and cooled to form a metallic material having a hardness of greater than about 9.2 GPa. The invention includes a method of forming a wire by combining a metal strip and a powder. The strip and the powder are rolled to form a wire containing at least 55% iron and from 2–7 additional elements including at lease one of C, Si and B. The invention also includes a method of forming a hardened surface on a substrate by processing a solid mass to form a power, applying the powder to a surface to form a layer containing metallic glass, and converting the glass to a crystalline material having a nanocrystalline grain size.
    Type: Grant
    Filed: January 5, 2004
    Date of Patent: June 27, 2006
    Assignee: Battelle Energy Alliance, LLC
    Inventor: Daniel J. Branagan
  • Patent number: 7001499
    Abstract: A process for electroplating and annealing thin-films of nickel-iron alloys having from 63% to 81% iron content by weight to produce pole pieces having saturation flux density (BS) in the range from 1.9 to 2.3 T (19 to 23 kG) with acceptable magnetic anisotropy and magnetostriction and a coercivity (HC) no higher than 160 A/m (2 Oe). The desired alloy layer properties, including small crystal size and minimal impurity inclusions, can be produced by including higher relative levels of Fe++ ions in the electroplating bath while holding the bath at a lower temperature while plating from a suitable seed layer. The resulting alloy layer adopts a small crystal size (BCC) without significant inclusion of impurities, which advantageously permits annealing to an acceptable HC while retaining the high BS desired.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: February 21, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Mike Ming Yu Chen, Thomas Edward Dinan, April Hixson-Goldsmith, Murali Ramasubramanian, Neil Leslie Robertson
  • Patent number: 6953627
    Abstract: A process for the production of thin walled parts of steel, wherein there are layers that are at least partly differently treatable relating to their strength and hardness qualities. This process can include creating a composite material from a plurality of different layers by connecting at least one core layer and at least one surface layer together. At least one layer of the core or surface layer is cast adjacent to another layer to form a composite material having an alloy gradient that is flat at each interface between any of the core layer or the surface layer. Next, the process can include deforming the composite material along a length of these layers. Finally the process can include heat treating the layers to transform the strength and hardness qualities of at least one of these layers.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: October 11, 2005
    Assignee: C.D. Walzholz-Brockhaus GmbH
    Inventor: Hans-Toni Junius
  • Patent number: 6905783
    Abstract: Steel sheet for porcelain enameling having excellent workability yet capable of providing an enamel layer having excellent adhesion with the steel sheet on direct-on enameling once and still free of black specks defects, a method for producing the same, as well as a porcelain enamel product and the method for producing the same are provided, in which low carbon Al-killed steel sheet, high oxygen steel sheet, Ti-added steel sheet, Nb-added steel sheet, Ti—Nb-added steel sheet or B-added steel sheet is used. A steel sheet for porcelain enameling is produced by applying Ni—Mo alloy plating to the low carbon Al-killed steel sheet, high oxygen steel sheet, Ti-added steel sheet, Nb-added steel sheet, Ti—Nb-added steel sheet or B-added steel sheet having specified components and composition ratio, and after performing heat treatment thereto to control the content of Ni, Mo, and Fe that are present on the surface of the steel sheet in a predetermined range, porcelain enamel is applied and fired.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: June 14, 2005
    Assignees: Ferro Enamels (Japan) Limited, Toyo Kohan Co., Ltd.
    Inventors: Fumiaki Sato, Toshihira Hamada, Shuzo Oda, Yoshihiro Jono, Takahiro Hayashida, Junichi Fujimoto, Masao Komai
  • Patent number: 6887322
    Abstract: High pressure cylinders comprising backing steel cylinders and tool steel liners are disclosed. An annealed tool steel liner is inserted into the backing steel cylinder, followed by heat treating to harden the tool steel liner. The tool steel liner may be provided as a single continuous tube, thereby avoiding problems associated with segmented liners. The high-pressure cylinders are suitable for use as plastic and rubber extruders injection molding cylinders and the like.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: May 3, 2005
    Assignee: Wexco Corporation
    Inventors: Donald W. Smith, Calvin D. Lundeen
  • Publication number: 20040238078
    Abstract: A method for heat treatment of a cold rolled strip with a surface coating of Ni and/or Co and incorporated non-metallic elements C and/or S, if need be with the addition of Fe, In, Pd, Au and/or Bi, whereby the cold rolled strip has a low carbon content. Since the compounds of C, S, N and P deposited on the grain boundaries bring about the most micro-cracks with the surface coating metal if no recrystallization takes place, the temperature of the heat treatment should be selected lower than the recrystallization temperature and higher than the precipitation temperature. With a recrystallization, the grain sizes would easily attain the thickness of the coating so that the embrittled compounds would migrate with the grain boundaries out of the coating. Due to the choice of temperature of the heat treatment of the surface coating of the invention, in contrast, an optimal embrittlement of the grain boundaries is guaranteed, which is especially advantageous in the manufacture of battery cans.
    Type: Application
    Filed: July 2, 2004
    Publication date: December 2, 2004
    Inventors: Werner Olberding, Beate Monscheuer, Claudia Dahmen, Karlfried Pfeifenbring
  • Publication number: 20040211494
    Abstract: The invention relates to a partition (1) or a method for producing a partition (1) for a multilayer pressed packet (3), wherein the partition (1) can be placed as a pressing sheet in the composite of a multilayer pressed packet (3) to be produced, especially between two multilayers (2).
    Type: Application
    Filed: December 31, 2003
    Publication date: October 28, 2004
    Inventor: Dieter Backhaus
  • Patent number: 6797406
    Abstract: The present invention relates to a color cathode ray tube provided with a pressed-type shadow mask. As material for constituting the shadow mask 6, a single plate body made of a composite gradient alloy plate consisting of three layers 6A, 6B, 6C or more in which an alloy element has the concentration gradient which is continuously changed from one surface to the other surface is used. The present invention can realize a pressed mask having a large radius of curvature by self-correcting the thermal deformation such as a doming or the like.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: September 28, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Noriharu Matsudate, Nobuhiko Hosotani
  • Patent number: 6777106
    Abstract: The present invention is directed to a metal block suitable for machining, the metal block comprising at least two superimposed metal plates, each having a thickness of at least 12.5 mm, wherein the yield strength of the block is at least 75% of the yield strength of the initial metal plate(s). The present invention is further directed to methods for manufacturing such blocks from two or more thick metal plates by explosive welding and other methods. Blocks according to the present invention are useful, for example, for manufacturing aircraft structural components or injection molds for plastics or rubber.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: August 17, 2004
    Assignee: Pechiney Rhenalu
    Inventors: Frédéric Catteau, David Godard
  • Patent number: 6767419
    Abstract: The invention encompasses a method of forming a metallic coating. A metallic glass coating is formed over a metallic substrate. After formation of the coating, at least a portion of the metallic glass can be converted into a crystalline material having a nanocrystalline grain size. The invention also encompasses metallic coatings comprising metallic glass. Additionally, the invention encompasses metallic coatings comprising crystalline metallic material, with at least some of the crystalline metallic material having a nanocrystalline grain size.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: July 27, 2004
    Assignee: Bechtel BWXT Idaho, LLC
    Inventor: Daniel J. Branagan
  • Patent number: 6749894
    Abstract: A method of providing a protective, corrosion-resistant thin coating of a MCrX alloy on a carbon or low-alloy steel pipe or tube where M is one of nickel, cobalt or iron or combination thereof and X is one of molybdenum, silicon, tungsten or combination thereof, and heat treating the coating to metallurgically bond the coating onto a steel substrate of the pipe or tube. The coating may be deposited in one or two layers by plasma transferred arc deposition or may be deposited as a slurry coating or thermal spray coating with sintering of the coating. The steel substrate is prepared for coating by at least one of boring, honing, bright finishing, grit blasting, grinding, chemical pickling or electro-polishing of the substrate.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: June 15, 2004
    Assignee: Surface Engineered Products Corporation
    Inventors: Chinnia Gounder Subramanian, David Aaron Easton, Konstantin K. Tzatzov, Alexander S. Gorodetsky, Andrew George Wysiekierski
  • Patent number: 6749954
    Abstract: A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition containing, on the basis of mass percent: about 0.03% to about 0.2% C, about 2.0% or less of Si, not less than about 1.0% to about 1.5% Mn, about 0.1% or less of P, about 0.01% or less of S, about 1.0% or less of Cr, about 0.1% or less of Al, about 0.1% or less of Nb, about 0.1% or less of Ti, about 0.1% or less of V, and about 0.01% or less of N; and by reduction-rolling the treated steel pipe at a cumulative reduction rate of at least about 35% and a final rolling temperature of about 500° C. to about 900° C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of at least about 590 MPa and an n×r product of at least about 0.22. The treated steel pipe is preferably reduction-rolled at a cumulative reduction rate of at least about 20% below the Ar3 transformation point.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: June 15, 2004
    Assignee: JFE Steel Corporation
    Inventors: Takaaki Toyooka, Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, Akira Yorifuji, Takatoshi Okabe, Takuya Nagahama, Mitsuo Kimura
  • Patent number: 6740178
    Abstract: A method for producing a metallic honeycomb configuration is described. The method includes forming a honeycomb body by stacking and/or winding layers of steel sheet containing chromium and aluminum resulting in the honeycomb body having channels through which a fluid can flow. The honeycomb body is introduced into a tubular jacket. Connections are formed between neighboring layers of steel sheet by thermal treatment. The honeycomb body is then cooled down. It is preferred for the layers of steel sheet to be provided with a rolling oil having a high carbon content before the forming of the honeycomb body, with the effect that a layer of carbon enhancing the sintering process is formed in the thermal treatment. The number of connections produced in individual regions can be further influenced by selective introduction of stresses or by stress relief.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: May 25, 2004
    Assignee: EMITEC Gesellschaft fuer Emissionstechnologie mbH
    Inventors: Ferdi Kurth, Andree Bergmann, Helge Schlotmann, Günther Faust, Ludwig Wieres
  • Patent number: 6723453
    Abstract: A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition containing, on the basis of mass percent: about 0.05% to about 0.2% C; about 0.2% or less of Si; about 1.5% or less of Mn; about 0.1% or less of P; about 0.01% or less of S; about 0.1% or less of Al; and about 0.01% or less of N; and by reduction-rolling the treated steel pipe at a cumulative reduction rate of at least about 35% and a final rolling temperature of about 500° C. to about 900° C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of at least about 400 MPa and an n×r product of at least about 0.22. The treated steel pipe is preferably reduction-rolled at a cumulative reduction rate of at least about 20% below the Ar3 transformation point. The welded steel pipe is suitable for forming structural components.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: April 20, 2004
    Assignee: JFE Steel Corporation
    Inventors: Takaaki Toyooka, Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, Akira Yorifuji, Takatoshi Okabe, Takuya Nagahama, Mitsuo Kimura
  • Patent number: 6712912
    Abstract: A weld filler metal alloy composition and a method for welding stainless steel components into a final assembly includes the steps of: austenitizing the stainless steel components to be welded at a temperature of 1800° F.-2000° F.; applying, using conventional arc welding techniques a solid wire of the filler metal alloy comprising in % by weight: up to 0.02% carbon; up to 0.8% manganese; up to 0.02% phosphorus; up to 0.015% sulfur; up to 0.6% silicon; 4.5-5.5% nickel; 0.4-0.7% molybdenum; 10-12.5% chromium; up to 0.1% copper; balance essentially iron and incidental impurities; and tempering the welded assembly welded at a temperature of 930° F.-1300° F. A second tempering step conducted at a temperature of 1095° F.-1145° F. may follow. The welding method can be used to make compressor impellers (6). The compressor impeller components comprise 13Cr-4Ni stainless steel.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: March 30, 2004
    Assignee: Elliott Turbomachinery Co., Inc.
    Inventors: Douglas K. Richards, Phillip Dowson
  • Patent number: 6706416
    Abstract: A method of producing a corrosion resistant ferrous product is disclosed. The product is produced by rolling a heated billet which comprises a mass of mild steel swarf in a stainless steel jacket. Two reducing agents are present in the jacket when the billet is heated. The first reducing agent is in the form of powdered aluminum, titanium turnings or other metal having a greater affinity for oxygen than chrome and which promotes the formation of CO rather than CO2 from air or oxygen which enters or evolves in the billet above about 800° C. The second reducing agent is in gaseous or vapour form substantially below that temperature. The second reducing agent may be provided by premixing with the swarf such substances as ammonium chloride or urea, which dissociate to form reducing gases when heated. Alternatively, the billet can be heated in a reducing furnace and the gas in the furnace may act as the second reducing agent.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: March 16, 2004
    Inventor: Antonino Giorgio Cacace
  • Patent number: 6692869
    Abstract: The objective of the present invention is to produce a surface treated steel sheet for a battery container of which electric contact to the positive electrode active material is improved, a method of surface treatment for a battery container, a battery container and a battery, wherein the surface treated steel sheet has a graphite dispersed nickel plating layer or a graphite dispersed nickel-alloy plating layer formed on the one side to be the inner surface of a battery container, in which nickel-cobalt alloy, nickel-cobalt-iron alloy, nickel-manganese alloy, nickel-phosphorus alloy, nickel-bismuth alloy or the like is preferable as an alloy plating layer, the battery container is manufactured from these surface treated steel sheets by DI forming or DTR forming, and the battery uses this battery container.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: February 17, 2004
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Hitoshi Ohmura, Tatsuo Tomomori, Hideo Ohmura, Keiji Yamane
  • Patent number: 6682829
    Abstract: A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition comprising, on the basis of mass percent: about 0.05% to about 0.3% C; about 2.0% or less of Si; more than about 1.5% to about 5.0% Mn; about 0.1% or less of P; about 0.01% or less of S; about 0.1% or less of Cr; about 0.1% or less of Al; about 0.1% or less of Nb; about 0.3% or less of Ti; and about 0.01% or less of N; and by diameter-reduction-rolling the treated steel pipe at a accumulated diameter reduction rate of at least about 35% and a finish rolling temperature of about 500° C. to about 900° C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of about 780 MPa or more and a n×r product of at least about 0.15. The treated steel pipe is preferably diameter-reduction-rolled at a accumulated diameter reduction rate of at least about 20% below the Ar3 transformation point.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: January 27, 2004
    Assignee: JFE Steel Corporation
    Inventors: Takaaki Toyooka, Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, Akira Yorifuji, Takatoshi Okabe, Takuya Nagahama, Mitsuo Kimura
  • Patent number: 6676777
    Abstract: The creep strength of a welded joint portion is improved, and damage of the welded joint portion based on the generation or development of cracks is suppressed. A postweld heat treatment process, wherein a welded joint made of carbon steel and low alloy steel is held within austenite single-phase temperature range for a given time and subsequently the joint is cooled by air-cooling or by slow cooling at a cooling rate lower than that of the air-cooling.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: January 13, 2004
    Assignee: National Institute for Materials Science
    Inventors: Kazuhiro Kimura, Masayoshi Yamazaki, Hiromichi Hongo, Junichi Kinugawa, Takashi Watanabe
  • Patent number: 6676896
    Abstract: The invention relates to a method of a composite material from superposed layers of solid and frothable metallic materials. The structural component consists of at least one layer of a solid metallic material and at least one layer of frothable metallic material. The structural component may be structured as a composite sheet or as a hollow body. The fabrication method of the structural component insures a good bond between the solid metallic layer and the frothable layer and that the frothable layer is securely attached to the solid metallic layer.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: January 13, 2004
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angwandten Forschung e.V.
    Inventor: Joachim Baumeister
  • Publication number: 20040001966
    Abstract: A method of providing a protective, corrosion-resistant thin coating of a MCrX alloy on a carbon or low-alloy steel pipe or tube where M is one of nickel, cobalt or iron or combination thereof and X is one of molybdenum, silicon, tungsten or combination thereof, and heat treating the coating to metallurgically bond the coating onto a steel substrate of the pipe or tube. The coating may be deposited in one or two layers by plasma transferred arc deposition or may be deposited as a slurry coating or thermal spray coating with sintering of the coating. The steel substrate is prepared for coating by at least one of boring, honing, bright finishing, grit blasting, grinding, chemical pickling or electro-polishing of the substrate.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Inventors: Chinnia Gounder Subramanian, David Aaron Easton
  • Patent number: 6627055
    Abstract: A continuously cast copper ingot is made by a procedure in which turbulence is imparted to the metal/solid interface during the casting operation. The ingot is then hot worked to form a billet having a smaller average grain size and a larger diameter than possible in the past. The billet is especially useful for making electroplating anodes used in the damascene process for making copper interconnects in silicon wafers.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: September 30, 2003
    Assignee: Brush Wellman, Inc.
    Inventors: William J. Bishop, David Krus, Jr.
  • Patent number: 6627007
    Abstract: A method has been developed for surface modifications of high temperature resistant alloys, such as FeCrAl alloys, in order to increase their resistance to corrosion at high temperatures. Coating it with a Ca-containing compound before heat-treating builds a continuos uniform and adherent layer on the surface of the alloy, that the aluminum depletion of the FeCrAl alloy is reduced under cyclic thermal stress. By this surface modification the resistance to high temperature corrosion of the FeCrAl alloy and its lifetime are significantly increased.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: September 30, 2003
    Assignee: Sandvik AB
    Inventors: Jan Andersson, Magnus Cedergren