Treating Consolidated Metal Powder, Per Se (i.e., No Sintering Or Compacting Step Present) Patents (Class 148/514)
  • Patent number: 9528558
    Abstract: A synchronizer hub for vehicles and a method for manufacturing the same forms an inner spline and an outer spline of a transmission synchronizer hub for vehicles by using different materials. The synchronizer hub may be manufactured by filling inner powders for forming the inner spline, molding the inner spline, filling outer powders for forming the outer spline, molding the outer spline, separating the double molded object obtained by integrally forming the inner spline and the outer spline from a mold, and performing sintering, post-processing, and high-frequency heating processes.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: December 27, 2016
    Assignee: Hyundai Motor Company
    Inventor: Na Ra Sin
  • Patent number: 9245660
    Abstract: The present invention is an electroconductive particle for forming an electrode including a precious metal particle including Pt or a Pt alloy and having an average particle diameter of 50 to 150 nm, a first ceramic particle including Al2O3 or ZrO2 dispersed in the precious metal particle and having an average particle diameter of 5 to 50 nm, and a second ceramic particle including Al2O3 or ZrO2 bonded to an outer periphery of the precious metal particle and having an average particle diameter of 5 to 50 nm. The sum of the volume of the first ceramic particle and the volume of the second ceramic particle is preferably 2 to 40 vol % based on the whole electroconductive particle. A metal paste containing the electroconductive particle according to the invention is one from which an electrode film of low resistance and excellent durability can be manufactured and further excellent in adherence and conformability to a substrate.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: January 26, 2016
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Takuya Hosoi, Nobuhisa Okamoto, Koichi Sakairi
  • Patent number: 9236212
    Abstract: One embodiment provides a tungsten wire containing 1 to 10% by mass of rhenium, the wire having a point indicating a 2% elongation within a quadrangle formed by joining points with straight lines, where the values of x and y are point (20, 75), point (20, 87), point (90, 75), and point (90, 58), in this order; wherein the wire diameter of the tungsten wire is represented by x ?m, and the elongation of the tungsten wire is 2% after electrically heating with an electrical current which is a ratio of y % to the fusion current (FC) at the wire diameter x ?m, and wherein a semi-logarithmic system of coordinates is expressed by a horizontal axis using a logarithmic scale of the wire diameter x and a vertical axis using a normal scale of ratio y to the fusion current.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: January 12, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takashi Tanaka, Motohisa Sakai, Yasuhiko Nakano, Kan Suganomata, Motoaki Esaki, Kayo Nakano
  • Patent number: 8852317
    Abstract: The present invention provides a technology for recovering high-content tantalum from tantalum-containing waste with reducing various impurities such as antimony (Sb) and phosphorus (P) which hinder reuse of the tantalum in tantalum capacitors. The method for recovering tantalum from tantalum-containing waste according to the present invention is characterized in that tantalum-containing waste is subjected to an acid treatment and then to an alkali treatment, thereby recovering tantalum. The acid treatment is preferably performed with use of an acid containing hydrochloric acid and the alkali treatment is preferably performed with use of sodium hydroxide or potassium hydroxide. The tantalum-containing waste in the present invention is preferably a tantalum sintered compact collected from a tantalum capacitor.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: October 7, 2014
    Assignee: Mitsui Mining & Smelting Co., Ltd.
    Inventors: Mami Yoshida, Kenji Matsuzaki, Tatsuya Aoki, Rintaro Ishii
  • Patent number: 8668066
    Abstract: A sintered coupling ring (1) is described, comprising a ring of coupling teeth (2) which comprise relieved flanks (4) extending from wedge-shaped end faces (3) and, on the side opposite the wedge-shaped end faces (3), a stop (5) that protrudes radially beyond the tooth tip (6). In order to provide advantageous constructional conditions it is proposed that the stops (5) have a greater density than the remaining tooth tip (6).
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: March 11, 2014
    Assignee: Miba Sinter Austria GmbH
    Inventors: Christian Kronberger, Horst Roessler, Christian Sandner
  • Patent number: 8636948
    Abstract: The present invention provides iron-based infiltration methods for manufacturing powder metallurgy components, compositions prepared from those methods, and methods of designing those infiltration methods. Iron-based infiltration methods table include the steps of providing an iron-based infiltrant composed of a near eutectic liquidus composition of a first iron based alloy system and an iron-based base compact composed of a near eutectic solidus powder composition of a second iron based alloy system. The base compact is placed in contact with the infiltrant and heated to a process temperature above the melting point of the infiltrant to form a liquid component of the infiltrant. Lastly, the base compact is infiltrated with the liquid component of the infiltrant. During infiltration, the liquid component of the infiltrant flows into the pores of the base compact.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: January 28, 2014
    Assignee: Hoeganaes Corporation
    Inventors: Frederick J. Semel, Kalathur S. Narasimhan
  • Patent number: 8088194
    Abstract: Provided is a method for producing hot briquette iron by hot-forming high-temperature reduced iron reduced in a reducing furnace, involving cooling the high-temperature reduced iron and controlling the temperature of the reduced iron to an appropriate hot-forming temperature of over 600° C. and 750° C. or less, producing hot briquette iron by hot-forming the high-temperature reduced iron at an appropriate hot-forming temperature with a briquetting machine.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: January 3, 2012
    Assignee: Kobe Steel, Ltd.
    Inventors: Hirofumi Tsutsumi, Yutaka Miyakawa
  • Publication number: 20110088817
    Abstract: A method of forging a nickel base superalloy comprising providing a nickel base superalloy preform (40) with a first predetermined shape, the nickel base superalloy preform having been produced by powder metallurgy. The nickel base superalloy preform (40) is forged to produce a nickel base superalloy forged component (50) with a second predetermined shape. The first predetermined shape and the second predetermined shape are arranged such that the effective strain at the end of the forging is less than 1. The nickel base superalloy forged component (50) is given a supersolvus heat treatment to produce a large grain size in the nickel base superalloy forged component (50).
    Type: Application
    Filed: September 15, 2010
    Publication date: April 21, 2011
    Applicant: ROLLS-ROYCE PLC
    Inventor: Robert J. MITCHELL
  • Publication number: 20110000586
    Abstract: A rare earth magnet is prepared by disposing a R1-T-B sintered body comprising a R12T14B compound as a major phase in contact with an R2-M alloy powder and effecting heat treatment for causing R2 element to diffuse into the sintered body. The alloy powder is obtained by quenching a melt containing R2 and M. R1 and R2 are rare earth elements, T is Fe and/or Co, M is selected from B, C, P, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, Hf, Ta, W, Pt, Au, Pb, and Bi.
    Type: Application
    Filed: June 29, 2010
    Publication date: January 6, 2011
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tadao Nomura, Hiroaki Nagata, Takehisa Minowa
  • Patent number: 7810625
    Abstract: A sintered clutch ring (1) is described, comprising a rim of clutch teeth (2) which comprise wedge-like face surfaces (3, 4) intersecting in an axial plane and flanks (5) sloping downwardly under an angle of inclination from the tooth back (6) against the tooth root, with the flanks (5) being relieved starting from a re-entrant, axially normal shoulder (7). In order to provide advantageous conditions for press forming the flank reliefs it is proposed that the planes of intersection between the wedge-like face surfaces (3, 4) extend outside of the center of the teeth and that the mutually axially offset shoulders (7) of the two flanks (5) of the clutch teeth (2) separate the relieved flanks (5) from a paraxial flank portion (8) which is substantially triangular and is adjacent to the face surfaces (3, 4).
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: October 12, 2010
    Assignee: Miba Sinter Austria GmbH
    Inventors: Günter Nelböck, Alexander Weiermair, Franz Heitzinger
  • Publication number: 20100116341
    Abstract: A method for fabricating a copper-gallium alloy sputtering target comprises forming a raw target; treating the raw target with at least one thermal treatment between 500° C.˜850° C. being mechanical treatment, thermal annealing treatment for 0.5˜5 hours or a combination thereof to form a treated target; and cooling the treated target to a room temperature to obtain the copper-gallium alloy sputtering target that has 71 atomic % to 78 atomic % of Cu and 22 atomic % to 29 atomic % of Ga and having a compound phase not more than 25% on its metallographic microstructure. Therefore, the copper-gallium alloy sputtering target does not induce micro arcing during sputtering so a sputtering rate is consistent and forms a uniform copper-gallium thin film. Accordingly, the copper-gallium thin film possesses improved quality and properties.
    Type: Application
    Filed: November 12, 2008
    Publication date: May 13, 2010
    Applicant: SOLAR APPLIED MATERIALS TECHNOLOGY CORP.
    Inventors: Wei-Chin Huang, Cheng-Hsin Tu
  • Publication number: 20100084055
    Abstract: A tungsten wire containing 1 to 10% by mass of rhenium has a point which indicates a 2% elongation within a quadrangle formed by joining points with straight lines, where the values of x and y are point (20, 75), point (20, 87), point (90, 75), and point (90, 58), in this order, wherein the wire diameter of the aforementioned tungsten wire is represented by x ?m, and the elongation of the tungsten wire is 2% after electrically heating with an electrical current which is a ratio of y % to the fusion current (FC) at the wire diameter x ?m, and wherein a semi-logarithmic system of coordinates is expressed by a horizontal axis using a logarithmic scale of the aforementioned wire diameter x and a vertical axis using a normal scale of ratio y to the fusion current.
    Type: Application
    Filed: December 7, 2009
    Publication date: April 8, 2010
    Inventors: Takashi Tanaka, Motohisa Sakai, Yasuhiko Nakano, Kan Suganomata, Motoaki Esaki, Kayo Nakano
  • Patent number: 7648596
    Abstract: An apparatus for rolling of a powder metallurgical metallic workpiece is provided having a feeding device, a first induction heating apparatus in operable communication with a first RF generator and at least a first hot rolling mill. A process control device monitors at least one parameter of the first RF generator and outputs a signal. A method for continuous rolling of a metallic workpiece is also provided using the apparatus for rolling. The process control device signal can be used to monitor metallurgical properties of the workpiece and provide in-line evaluation of the workpiece.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: January 19, 2010
    Assignee: Philip Morris USA Inc.
    Inventors: David Sharpe, Firooz Rasouli, John F. Cunningham
  • Patent number: 7615185
    Abstract: After an alloy powder including W, Cr, at least one of Ti, Zr, and Hf, and at least one of V, Nb, and Ta is produced, the alloy powder, a powdery carbon material, and a catalyst are heat-treated in the presence of a nitrogen gas. The alloy powder is carbonitrided into a multicomponent ceramics powder, and sintered into a sintered body. Alternatively, a powder of a first substance including at least two of Ti, Al, V, Nb, Zr, Hf, Mo, Ta, Cr, and W is molded into a molded body. Then, the surface of the molded body is surrounded by a second substance including a metal element which is not contained in the powder of the first substance, and the molded body is heat-treated in an atmosphere in which N is present. A porous sintered body thus produced is crushed into a multicomponent ceramics powder.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: November 10, 2009
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Mitsuo Kuwabara
  • Publication number: 20090220819
    Abstract: A bimetallic doctor blade (1) has a support strip (20) made of conventionally produced steel and a working edge (10) made of a steel produced by a powder metallurgical process. Also disclosed is a method for producing this type of bimetallic doctor blade (1), wherein a flat wire is produced from metal powder by a powder metallurgical process, and the flat wire is then welded to a conventionally produced support strip (20) made of steel in order to form a bimetallic doctor blade with a support strip (20) and a working edge (10).
    Type: Application
    Filed: December 29, 2006
    Publication date: September 3, 2009
    Inventors: Gregor Innitzer, Leander Ahorner
  • Patent number: 7553793
    Abstract: A method for recovering a catalyst for a fuel cell includes a collection step in which a catalyst is collected by attracting, using a magnetic force, a magnetic material contained in at least one of the catalyst and a carrier on which the catalyst is supported. A system for recovering a catalyst for a fuel cell includes a collection device that attracts, using a magnetic force, a magnetic material contained in at least one of a catalyst and a carrier on which the catalyst is supported.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: June 30, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kazuhiro Taniwaki
  • Publication number: 20080156401
    Abstract: Infiltration compositions comprising chromium and at least about 80% copper. The infiltration compositions may further comprise iron, zinc, manganese, antimony and/or lubricants. Also, methods for infiltrating powder metal parts comprising contacting a powder metal part with the infiltration composition comprising chromium and at least about 80% copper and heating the powder metal part and infiltration composition to a temperature sufficient to melt the infiltration composition and allow the infiltration composition to infiltrate through pores in the powder metal part.
    Type: Application
    Filed: January 3, 2008
    Publication date: July 3, 2008
    Inventors: Arun K. Chattopadhyay, Jessu Joys
  • Publication number: 20080096037
    Abstract: The present invention relates to a steel band 1 for the manufacturing of doctor blades, coater blades or creping blades comprising a steel composition comprising in percent per weight 1-3% C, 4-10% Cr, 1-8% Mo, 2.5-10% V and the remainder essentially iron and contaminants in normal amounts, wherein the steel band 1 is produced by using a powder metallurgical process. Further, this invention relates to doctor blades, coater blades or creping blades of this steel band, as well as a method for its manufacture.
    Type: Application
    Filed: July 7, 2005
    Publication date: April 24, 2008
    Inventors: Manfred Daxelmuller, Helmut Ponemayr
  • Publication number: 20040244879
    Abstract: A tungsten wire containing 1 to 10% by mass of rhenium has a point which indicates a 2% elongation within a quadrangle formed by joining points with straight lines, where the values of x and y are point (20, 75), point (20, 87), point (90, 75), and point (90, 58), in this order, wherein the wire diameter of the aforementioned tungsten wire is represented by x &mgr;m, and the elongation of the tungsten wire is 2% after electrically heating with an electrical current which is a ratio of y % to the fusion current (FC) at the wire diameter x &mgr;m, and wherein a semi-logarithmic system of coordinates is expressed by a horizontal axis using a logarithmic scale of the aforementioned wire diameter x and a vertical axis using a normal scale of ratio y to the fusion current.
    Type: Application
    Filed: April 6, 2004
    Publication date: December 9, 2004
    Inventors: Takashi Tanaka, Motohisa Sakai, Yasuhiko Nakano, Kan Suganomata, Motoaki Esaki, Kayo Nakano
  • Publication number: 20040221927
    Abstract: A superalloy made of a forging nickel-base superalloy such as Rene™ 88DT or ME3 is forged in a forging press having forging dies made of a die nickel-base superalloy. The forging is accomplished by heating to a forging temperature of from about 1700° F. to about 1850° F., and forging at that forging temperature and at a nominal strain rate. The die nickel-base superalloy is selected to have a creep strength of not less than a flow stress of the forging nickel-base superalloy at the forging temperature and strain rate.
    Type: Application
    Filed: July 19, 2002
    Publication date: November 11, 2004
    Inventors: Edward Lee Raymond, Shesh Krishna Srivatsa
  • Publication number: 20040211493
    Abstract: The present invention teaches a method in which a cemented carbide product is prepared such that the ease and quality of brazing is improved. The process involves a controlled heat treatment such that the surface of the carbide is enriched with cobalt from the carbide matrix. This cobalt surface enhances the wettability and flow during brazing and provides for improved bond strength.
    Type: Application
    Filed: April 28, 2003
    Publication date: October 28, 2004
    Inventor: Christopher Robert Comer
  • Patent number: 6787504
    Abstract: The invention is intended to establish means for manufacturing MB2 single crystals and to provide a useful superconductive material (wire rod and so forth) taking advantage of anisotropic superconductive properties thereof. A mixed raw material of Mg and B or a precursor containing MgB2 crystallites, obtained by causing reaction of the mixed raw material of Mg and B, kept in contact with hexagonal boron nitride (hBN), is held at a high temperature in the range of 1300 to 1700° C. and under a high pressure in the range of 3 to 6 GPa to cause reaction for forming an intermediate product, thereby growing the MB2 single crystals having anisotropic superconductive properties via the intermediate product.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: September 7, 2004
    Assignee: International Superconductivity Technology Center, The Juridicial Foundation
    Inventors: Lee Sergey Romonovich, Ayako Yamamoto, Setsuko Tajima
  • Publication number: 20040140021
    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 strop 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 forma a layer containing metallic glass, and converting the glass to a crystalline material having a nanocrystalline grain size.
    Type: Application
    Filed: January 5, 2004
    Publication date: July 22, 2004
    Inventor: Daniel J. Branagan
  • Patent number: 6752881
    Abstract: In a metalliferous storage material for hydrogen a metal oxide is provided in or on the surface of the metalliferous materialas a catalyst for the hydrogenation or dehydrogenation of the metalliferous storage material.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: June 22, 2004
    Assignee: GKSS-Forschungszentrum Geesthacht GmbH
    Inventors: Thomas Klassen, Rüdiger Bormann, Wolfgang Oelerich, Volker Güther, Andreas Otto
  • Publication number: 20040079452
    Abstract: The present invention concerns a method of improving the properties of powder metallurgically produced SMC compacted body consisting of a soft magnetic material of insulated powder particles and a lubricant, to a stress relieving heat treatment in a furnace until the component has reached a temperature of at least 400° C. in an oxygen containing atmosphere having a CO content is less than 0.25% by volume.
    Type: Application
    Filed: February 14, 2003
    Publication date: April 29, 2004
    Inventors: Ye Zhou, Per-Olof Larsson, Henrik Andersson, Lars Hultman
  • 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: 6675460
    Abstract: A method of making a composite powder metal disk for a rotor assembly in a synchronous reluctance machine. The method includes filling discrete regions of a disk-shaped die with ferromagnetic and non-ferromagnetic powder metals, compacting to powders, and sintering the compacted powders. By this method, a disk is formed that includes alternating regions of magnetically conducting powder metal and magnetically non-conducting powder metal compacted and sintered to a high density. The method may also include forming a rotor assembly by stacking a plurality of the composite powder metal disks axially along a shaft with their magnetic configurations aligned.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: January 13, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: Frederick B. Reiter, Jr., Tom L. Stuart, Scott M. Clase, Bradley D. Beard
  • 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
  • Patent number: 6576355
    Abstract: Nanostructured non-stoichiometric materials are provided and electronic materials and their applications are discussed. More specifically, the uses of nanotechnology and nanostructured materials for electronic products.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: June 10, 2003
    Assignee: NanoProducts Corporation
    Inventors: Tapesh Yadav, John Freim, Yuval Avniel
  • Patent number: 6569518
    Abstract: Novel non-ionics and energy device materials made from non-stoichiometric nanomaterials and their applications are discussed. More specifically, the specifications teach the use of nanotechnology and nanostructured materials for developing novel energy related products.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: May 27, 2003
    Assignee: NanoProducts Corporation
    Inventors: Tapesh Yadav, Ming Au
  • Patent number: 6562495
    Abstract: Nanostructured non-stoichiometric materials are disclosed. Novel catalysts and their applications are discussed. More specifically, the specifications teach the use of nanotechnology and nanostructured materials for developing novel catalysts for petrochemical, polymers, plastics, specialty chemicals, environmental and pharmaceutical applications.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: May 13, 2003
    Assignee: NanoProducts Corporation
    Inventors: Tapesh Yadav, Bijan Miremadi
  • Publication number: 20030042647
    Abstract: A boron containing ceramic-aluminum metal composite is formed by mixing a boron containing ceramic with a metal powder comprised of aluminum or alloy thereof, shaping the mixture into a porous preform, contacting the preform with an infiltrating metal comprised of aluminum or alloy thereof that melts at a lower temperature than the metal powder and heating to a temperature sufficient to melt the infiltrating metal, but insufficient to melt the metal powder, such that the infiltrating metal infiltrates the porous preform to form the composite. The composite that is formed may be used for vehicular parts.
    Type: Application
    Filed: August 22, 2002
    Publication date: March 6, 2003
    Inventors: Aleksander J. Pyzik, Uday V. Deshmukh, Nicholas M. Shinkel, Tim L. Allen
  • Patent number: 6485584
    Abstract: This invention relates to a method of manufacturing an improved ferritic or martensitic alloy based on iron and chromium strengthened by a dispersion of oxides, commonly called an Oxide Dispersion Strengthened or ODS alloy, and, more particularly to a method of manufacturing a ferritic or martensitic ODS alloy with large grains based on iron and chromium which has a single phase ferritic or martensitic matrix having an isotropic microstructure and a grain size that is sufficient to guarantee mechanical strength compatible with a use of this alloy at high temperature and/or under neutron irradiation. According to the invention, the method comprises slow cooling of an austenite at a cooling rate less than or equal to the critical cooling rate for transformation of this austenite into ferrite.
    Type: Grant
    Filed: April 6, 1999
    Date of Patent: November 26, 2002
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Véronique Lambard, Ana Alamo, Jean-Louis Seran
  • Patent number: 6409965
    Abstract: An ingot is made from a used target of 30 weight % or more, and new metals of the same components, and recycled alloy powder is made by a gas atomizing process. Magnetic permeability is controlled not to exceed 2 by adjusting the content of rare earth metals in rare earth alloy powder to be at least 35 weight %. By blending the recycled alloy powder with other powder to produce alloy powder containing at least 50 weight % of rare earth alloy powder having a magnetic permeability not higher than 2 and containing at least 65 weight % of rare earth alloy powder. By sintering the alloy powder under pressure and thereafter cutting top, bottom and side surfaces of the sintered material, a target having a magnetic permeability not higher than 2 and having a thickness not less than 8 mm is fabricated.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: June 25, 2002
    Assignee: Sony Corporation
    Inventors: Takahiro Nagata, Manabu Sasaki, Hitoshi Kimura, Norio Yokoyama
  • Publication number: 20020064475
    Abstract: A valve seat made of an Fe-based sintered alloy excellent in wear resistance and having a reduced counterpart valve attack property is disclosed, which comprises a base comprising 15-40% by weight of Cu, 0.3-12% by weight of Ni and 0.0005-3.0% by weight of C, and further comprising 0.1-10% by weight of Co and 0.1-10% by weight of Cr when necessary, with the balance being Fe and inevitable impurities, the base having a structure which comprises an Fe-based alloy phase 1 composed of Fe as a main component combined by a Cu-based alloy phase 2 composed of Cu as a main component, wherein hard particles phase 3 having MHV of 500-1700 is dispersed in the base. The Fe-based alloy phase 1 is an Fe alloy phase which comprises Ni, Cu and C with Fe having more than 50% by weight, while the Cu-based alloy phase 2 is a Cu alloy phase which comprises Ni, Fe and C with Cu having more than 50% by weight.
    Type: Application
    Filed: November 15, 2001
    Publication date: May 30, 2002
    Applicant: Mitsubishi Materials Corporation
    Inventors: Kinya Kawase, Koichiro Morimoto
  • Patent number: 6387196
    Abstract: A process for producing a particle-reinforced titanium alloy includes the steps of: heating a titanium alloy in which ceramic particles having a thermodynamically stable property are dispersed in a temperature range of not less than &bgr;-transus temperature; and cooling the titanium alloy to pass through the &bgr;-transus temperature at a cooling rate of 0.1-30° C./second. The process can further include, before the heating step, the step of compressing the titanium alloy in a two phase temperature range of &agr;+&bgr; thereof or in a temperature range of not less than &bgr;-transus temperature.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: May 14, 2002
    Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Chuo Kenkyusho, Aisan Kogyo Kabushiki Kaisha
    Inventors: Toshiya Yamaguchi, Tadahiko Furuta, Takashi Saito, Kouji Sakurai
  • Patent number: 6332936
    Abstract: A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as ≦1% Cr, ≧0.05% Zr ≦2% Ti, ≦2% Mo, ≦1% Ni, ≦0.75% C, ≦0.1% B, ≦1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, and/or ≦3% Cu.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: December 25, 2001
    Assignee: Chrysalis Technologies Incorporated
    Inventors: Mohammad R. Hajaligol, Clive Scorey, Vinod K. Sikka, Seetharama C. Deevi, Grier Fleischhauer, A. Clifton Lilly, Jr., Randall M. German
  • Patent number: 6331271
    Abstract: A method of treating parts (34) in a treatment chamber (33) by hot-isostatic pressing with an inert gas as pressure medium and in the presence of a purifying agent (25a) for the inert gas comprises the steps of reducing the pressure in the treatment chamber (33), increasing the pressure again by introducing the inert gas, increasing the temperature in the treatment chamber (33) by activating heating elements (9a), and, after a certain holding time, reducing the pressure and the temperature again. Especially if the purifying agent (25a) is of the same material as the parts (34) being treated, the purifying effect of the purifying agent becomes insufficient. The effect of the purifying agent (25a) is improved according to the invention by bringing the inert gas, at least when being introduced, to circulate such that it is heated, passes through the purifying agent and is thereafter cooled before contacting the parts. The invention also relates to a device for carrying out the method.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: December 18, 2001
    Assignee: Flow Holdings GmbH, (SAGL) LLC
    Inventor: Carl Bergman
  • Patent number: 6315838
    Abstract: A method for creep cavity shrinkage and/or porosity reduction without applied stress. The thermal treatment is found to increase the rate of densification relative to isothermal annealing, allowing for more rapid recovery of desired theoretical density in a shorter time.
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: November 13, 2001
    Assignee: Northwestern University
    Inventors: David C. Dunand, Christopher Schuh
  • Patent number: 6294130
    Abstract: A metallic alloy composition is manufactured into products such as press formed or stamped products or rolled products such as sheet, strip, rod, wire or band by one or more cold working steps with intermediate or final flash annealing. The method can include cold rolling an iron, nickel or titanium aluminide alloy and annealing the cold worked product in a furnace by infrared heating. The flash annealing is preferably carried out by rapidly heating the cold worked product to an elevated temperature for less than one minute. The flash annealing is effective to reduce surface hardness of the cold worked product sufficiently to allow further cold working. The product to be cold worked can be prepared by casting the alloy or by a powder metallurgical technique such as tape casting a mixture of metal powder and a binder, roll compacting a mixture of the powder and a binder or plasma spraying the powder onto a substrate.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: September 25, 2001
    Assignee: Chrysalis Technologies Incorporated
    Inventors: Mohammad R. Hajaligol, Vinod K. Sikka
  • Patent number: 6210547
    Abstract: A process for altering surface properties of a mass of metal alloy solder comprising a first metal and a second metal. The process comprises exposing the mass to energized ions to preferentially sputter atoms of the first metal to form a surface layer ratio of first metal to second metal atoms that is less than the bulk ratio. The solder may be located on the surface of a substrate, wherein the process may further comprise masking the substrate to shield all but a selected area from the ion beam. The sputtering gas may comprises a reactive gas such as oxygen and the substrate may be an organic substrate. The process may further comprise simultaneously exposing the organic substrate to energized ions of the reactive gas to roughen the organic substrate surface.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: April 3, 2001
    Assignee: International Business Machines Corporation
    Inventors: Frank D. Egitto, Edmond O. Fey, Luis J. Matienzo, David L. Questad, Rajinder S. Rai, Daniel C. Van Hart
  • Patent number: 6156093
    Abstract: A method of imparting high strength, high ductility, and high fracture toughness to a refractory metal alloy workpiece includes: (i) subjecting the workpiece to at least one pass that reduces the initial cross-sectional area of said workpiece, (ii) annealing the workpiece subsequent to the at least one pass, and (iii) subjecting the workpiece to a final working step comprising at least one pass conducted at a temperature between ambient and 300.degree. C., the final working step further reducing the cross-sectional area of the workpiece such that the total reduction in the initial cross-sectional area of the workpiece is approximately 40%-75% and the final cold working is 0.30 to 0.75 of the total reduction in cross-sectional area. The resulting article has a tensile yield strength of approximately 170-200 Ksi, a tensile elongation of approximately 12%-17%, and a Charpy 10 mm Smooth Bar impact toughness of approximately 100 ft.-lb. to 240 ft.-lb.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: December 5, 2000
    Assignee: Lockheed Martin Corporation
    Inventor: William R. Spencer
  • Patent number: 6143241
    Abstract: A metallic alloy composition is manufactured into products such as press formed or stamped products or rolled products such as sheet, strip, rod, wire or band by one or more cold working steps with intermediate or final flash annealing. The method can include cold rolling an iron, nickel or titanium aluminide alloy and annealing the cold worked product in a furnace by infrared heating. The flash annealing is preferably carried out by rapidly heating the cold worked product to an elevated temperature for less than one minute. The flash annealing is effective to reduce surface hardness of the cold worked product sufficiently to allow further cold working. The product to be cold worked can be prepared by casting the alloy or by a powder metallurgical technique such as tape casting a mixture of metal powder and a binder, roll compacting a mixture of the powder and a binder or plasma spraying the powder onto a substrate.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: November 7, 2000
    Assignee: Chrysalis Technologies, Incorporated
    Inventors: Mohammad R. Hajaligol, Vinod K. Sikka
  • Patent number: 6136105
    Abstract: A method of imparting high strength, high ductility, and high fracture toughness to a refractory metal alloy workpiece includes: (i) subjecting the workpiece to at least one pass that reduces the initial cross-sectional area of said workpiece, (ii) annealing the workpiece subsequent to the at least one pass, and (iii) subjecting the workpiece to a final working step comprising at least one pass conducted at a temperature between ambient and 300.degree. C., the final working step further reducing the cross-sectional area of the workpiece such that the total reduction in the initial cross-sectional area of the workpiece is approximately 40%-75% and the final cold working is 0.30 to 0.75 of the total reduction in cross-sectional area. The resulting article has a tensile yield strength of approximately 170-200 Ksi, a tensile elongation of approximately 12%-17%, and a Charpy 10 mm Smooth Bar impact toughness of approximately 100 ft.-lb. to 240 ft.-lb.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: October 24, 2000
    Assignee: Lockheed Martin Corporation
    Inventor: William R. Spencer
  • Patent number: 5993508
    Abstract: Silicon-containing residues, as they accumulate especially during the synthesis of organosilanes out of metallic silicon, and especially methyl chloride, are processed according to the invention to briquettes, being additives for the quality adjustment of cast iron being produced in a cupola furnace in order to avoid either costly regeneration for the recovering of the valuable components or the total dumping of said silicon-containing residues. Besides the silicon-containing residue the briquettes contain 1-10 percent by weight of cardboard fiber, 5-40 percent by weight of hydraulic cement and 0-20 percent by weight of additional additives having influence on the quality of the cast iron. The cement- and cardboard fiber-containing briquettes are mechanically and thermally sufficiently stable with respect to the operation of the melting furnace. The yielding rate of the inserted small-sized silicon in the cast iron is about 85% and reaches thereby the same range of lumpy ferrosilicon.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: November 30, 1999
    Assignee: Elkem ASA
    Inventor: Lutz Stephan
  • Patent number: 5993513
    Abstract: A method for controlling oxygen in valve metal materials. The method includes deoxidizing a valve metal material, typically tantalum, niobium, or alloys thereof, and leaching the material in an acid leach solution at a temperature lower than room temperature. In one embodiment of the present invention, the acid leach solution is prepared and cooled to a temperature lower than room temperature prior to leaching the deoxidized valve metal material. The method of the present invention has been found to lower both the oxygen and fluoride concentrations in valve metal materials, as the use of reduced acid leach temperatures provide lower oxygen for a given quantity of a leach acid, such as hydrofluoric acid.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: November 30, 1999
    Assignee: Cabot Corporation
    Inventor: James A. Fife
  • Patent number: 5972132
    Abstract: Inner or outer cylindrical worked surfaces of powder metal components are bearingized by orbiting tapered rollers against them using a tapered mandrel having points for impacting the rollers against the worked surface.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: October 26, 1999
    Assignee: Zenith Sintered Products, Inc.
    Inventor: Terry M. Cadle
  • Patent number: 5964967
    Abstract: A treatment process for a composite comprising a matrix of a precipitation hardenable aluminum alloy and a particulate or short fiber ceramic reinforcement. The process includes hot and/or cold working the composite, subjecting the composite to a controlled heating step in which the composite is raised from ambient temperature to a temperature of from 250 to 450.degree. C. at a rate of temperature increase less than 1000.degree. C. per hour, and subjecting the resulting heat treated composite to a solution treating step.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: October 12, 1999
    Assignees: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland, Defence Research Agency
    Inventors: Timothy Frederick Bryant, Simon Brian Dodd, Stephen Mark Flitcroft, William Sinclair Miller, Roger Moreton, Christopher John Peel
  • Patent number: 5908486
    Abstract: Austenitic stainless steels and nickel-base alloys containing, by wt. %, 0.1 to 3.0% V, 0.01 to 0.08% C, 0.01 to 0.5% N, 0.05% max. each of Al and Ti, and 0.005 to 0.10% O, are strengthened and ductility retained by atomization of a metal melt under cover of an inert gas with added oxygen to form approximately 8 nanometer-size hollow oxides within the alloy grains and, when the alloy is aged, strengthened by precipitation of carbides and nitrides nucleated by the hollow oxides. Added strengthening is achieved by nitrogen solid solution strengthening and by the effect of solid oxides precipitated along and pinning grain boundaries to provide temperature-stabilization and refinement of the alloy grains.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: June 1, 1999
    Assignee: Lockheed Martin Idaho Technologies Company
    Inventors: John E. Flinn, Thomas F. Kelly
  • Patent number: 5885379
    Abstract: A method of tempering powdered metallurgical constructs, that includes first deoxygenating and dehydrating powdered metal compacts before tempering. During the process, the sintered compacts are first preheated to a temperature that desorbs water vapor and oxygen from interstitial spaces of the compact, while not accelerating the rate of oxidation of any metal component. Once deoxygenation and dehydration has been achieved, the compact is heated to a tempering temperature in a substantially oxygen and water vapor-free environment and is maintained at that temperature until tempering is complete. Substantially oxygen and water-vapor free environmental conditions are maintained while the tempered compacts are cooled, to avoid post-oxidation. The resultant tempered powdered metal devices have increased strength, ductility and better machinability than conventionally tempered constructs.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: March 23, 1999
    Assignee: The Landover Company
    Inventor: Lyle K. Snyder