With Another Nonmetal Patents (Class 75/237)
  • Patent number: 9970086
    Abstract: Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900° C., to bond iron structures to each other with copper and tin.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: May 15, 2018
    Inventors: Toshihiko Mouri, Hiroharu Nagata
  • Patent number: 9074270
    Abstract: A sintered cermet and a cutting tool are provided which have high toughness and high anti-chipping. The sintered cermet comprises a hard phase composed of one or more kinds selected from carbides, nitrides, and carbonitrides of one or more metals selected from metals belonging to Groups 4, 5, and 6 of the periodic table, each of which is composed mainly of Ti; and a binder phase composed mainly of Ni and Co. When the crystal lattice constant of the binder phase is measured by Pawley method, two kinds of binder phases having two kinds of crystal lattice constants B1 and B2 exist in the interior of the sintered cermet.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: July 7, 2015
    Inventors: Takashi Tokunaga, Hideyoshi Kinoshita
  • Patent number: 8992657
    Abstract: A lightweight material for decorative parts having a silver metallic color tone is provided. The material includes a sintered body including a main hard phase composed of a solid solution formed of titanium carbonitride and titanium carbide; a main binder phase composed of nickel; a first additive material composed of at least one selected from the group consisting of molybdenum carbide, niobium carbide, tungsten carbide, and tantalum carbide; a second additive material composed of at least one of chromium and chromium carbide; and the balance being incidental impurities. The N content in the sintered body is 2.0% to 6.0% by mass. The color tone of the sintered body satisfies L*=9 to 14, a*=?2 to 3, and b*=?6 to 0, which are values of the L*a*b* color system measured with a spectrophotometric colorimeter.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: March 31, 2015
    Assignees: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Yoshimitsu Sawazono, Katsuya Uchino, Yoshihiro Minato
  • Patent number: 8864869
    Abstract: The hearth roll for a continuous annealing furnace is able to suppress the occurrence of buildup on the hearth roll surface and able to be stably used for a long period under the high temperature environment. The hearth roll has a cermet coating comprised 50 to 90 vol % of ceramic and the balance of a heat resistant alloy on its surface, the ceramic containing Cr3C2: over 50 to 90 vol %, Al2O3: 1 to 40 vol %, Y2O3: 0 to 3 vol %, and ZrB2: 0 to 40 vol % and having a balance of unavoidable impurities and pores, the heat resistant alloy containing Cr: 5 to 20 mass %, Al: 5 to 20 mass %, and one or both of Y and Si: 0.1 to 6 mass % and has a balance of one or both of Co and Ni and unavoidable impurities.
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: October 21, 2014
    Assignees: Nippon Steel & Sumitomo Metal Corporation, Tocalo Co., Ltd.
    Inventors: Yasushi Kurisu, Tatsuo Suidzu
  • Patent number: 8617288
    Abstract: A sintered material for valve guides consists of, by mass %, 0.01 to 0.3% of P, 1.3 to 3% of C, 1 to 4% of Cu, and the balance of Fe and inevitable impurities. The sintered material exhibits a metallic structure made of pores and a matrix. The matrix is a mixed structure of a pearlite phase, a ferrite phase, an iron-phosphorus-carbon compound phase, and a copper phase, and a part of the pores including graphite that is dispersed therein. The iron-phosphorus-carbon compound phase is dispersed at 3 to 25% by area ratio, and the copper phase is dispersed at 0.5 to 3.5% by area ratio, with respect to a cross section of the metallic structure, respectively.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: December 31, 2013
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventors: Hiroki Fujitsuka, Hideaki Kawata
  • Publication number: 20120103135
    Abstract: A powder metal composite is disclosed. The powder metal composite includes a substantially-continuous, cellular nanomatrix comprising a nanomatrix material. The compact also includes a plurality of dispersed particles comprising a particle core material that comprises Mg, Al, Zn or Mn, or a combination thereof, dispersed in the nanomatrix, the core material of the dispersed particles comprising a plurality a plurality of distributed carbon nanoparticles, and a bond layer extending throughout the nanomatrix between the dispersed particles. The nanomatrix powder metal composites are uniquely lightweight, high-strength materials that also provide uniquely selectable and controllable corrosion properties, including very rapid corrosion rates, useful for making a wide variety of degradable or disposable articles, including various downhole tools and components.
    Type: Application
    Filed: October 27, 2010
    Publication date: May 3, 2012
    Inventors: Zhiyue Xu, Soma Chakraborty, Gaurav Agrawal
  • Publication number: 20120082585
    Abstract: A sintered material for valve guides consists of, by mass %, 1.3 to 3% of C, 1 to 4% of Cu, 0.01 to 0.08% of P, 0.05 to 0.5% of Sn, and the balance of Fe and inevitable impurities. The sintered material exhibits a metallic structure made of pores and a matrix. The matrix is a mixed structure of a pearlite phase, a ferrite phase, an iron-phosphorus-carbon compound phase, and at least one of a copper-tin alloy phase and a combination of a copper phase and a copper-tin alloy phase. A part of the pores includes graphite that is dispersed therein. The iron-phosphorus-carbon compound phase is dispersed at 3 to 25% by area ratio, and the copper-tin alloy phase and the combination of the copper phase and the copper-tin alloy phase are dispersed at 0.5 to 3.5% by area ratio, with respect to a cross section of the metallic structure, respectively.
    Type: Application
    Filed: September 23, 2011
    Publication date: April 5, 2012
    Inventors: Hiroki FUJITSUKA, Hideaki KAWATA
  • Patent number: 7988758
    Abstract: Discontinuous diamond particulate containing metal matrix composites of high thermal conductivity and methods for producing these composites are provided. The manufacturing method includes producing a thin reaction formed and diffusion bonded functionally graded interactive SiC surface layer on diamond particles. The interactive surface converted SiC coated diamond particles are then disposed into a mold and between the particles and permitted to rapidly solidify under pressure. The surface conversion interactive SiC coating on the diamond particles achieves minimal interface thermal resistance with the metal matrix which translates into good mechanical strength and stiffness of the composites and facilitates near theoretical thermal conductivity levels to be attained in the composite. Secondary working of the diamond metal composite can be performed for producing thin sheet product.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: August 2, 2011
    Assignee: Nano Materials International Corporation
    Inventors: Sion M. Pickard, James C. Withers, Raouf O. Loutfy
  • Publication number: 20110146448
    Abstract: A sintered valve guide exhibits a metallic structure having a mixed structure and a hard phase in which hard particles are dispersed in an alloy matrix. The mixed structure consists of pearlite, an Fe—P—C ternary eutectic phase, a ferrite phase, a copper phase, and pores, and the mixed structure consists of, by mass %, 0.075 to 0.525% of P, 3.0 to 10.0% of Cu, 1.0 to 3.0% of C, and the balance of Fe and inevitable impurities. The hard phase is dispersed at 2 to 15 mass % in the mixed structure.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 23, 2011
    Inventors: Hiroki FUJITSUKA, Hideaki KAWATA
  • Patent number: 7799111
    Abstract: The invention relates to a thermal spray feedstock composition that employs free flowing agglomerates formed from (a) a ceramic component that sublimes,(b) a metallic or semi-conductor material that does not sublime and (c) a binder. The invention also relates to a method for preparing the agglomerates and a method for preparing ceramic containing composite structures from the agglomerates.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: September 21, 2010
    Assignee: Sulzer Metco Venture LLC
    Inventors: David S. Gollob, Thomas H. Piquette, James Derby, Omar Basil Al-Sabouni, Richard Karl Schmid, Jacobus Cornelis Doesburg
  • Publication number: 20090257903
    Abstract: The present invention relates to a high speed steel with a chemical composition that comprises, in % by weight: 0.6-2.1 C 3-5 Cr 4-14 Mo max 5 W max 15 Co 0.5-4 V, balance Fe and impurities from the manufacturing of the material, which steel is powder metallurgically manufactured and has a content of Si in the range of 0.7<Si?2.
    Type: Application
    Filed: September 7, 2006
    Publication date: October 15, 2009
    Inventor: Stefan Sundin
  • Patent number: 7413591
    Abstract: The throw-away tip has a shape of substantially flat plate, comprising from 1 to 30% by weight of binder phase comprising at least one kind of Co and Ni, and 70 to 99% by weight of carbonitride phase comprising composite metal carbonitride of Ti and one or more kind other than Ti among metals of groups 4a, 5a and 6a of the Periodic Table, wherein the mean grain size of the carbonitride phase is 1.5 ?m or less, while flexural strength test pieces which are cut out of ten throw-away tips including the side face thereof show flexural strength with a Weibull coefficient of 5 or higher. Throw-away tips having fine carbonitride phase structure and high cutting performance can be made with less variance among individual throw-away tips.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: August 19, 2008
    Assignee: Kyocera Corporation
    Inventor: Takashi Tokunaga
  • Publication number: 20040237713
    Abstract: An improved ceramic/metal composite material is disclosed which is fully reacted with aluminum. The composite is made from a ceramic preform, such as silicon carbide, having a binding agent, such as silica, that is contacted with a metal mixture or alloy, such as aluminum/silicon, that reacts with the binding agent to form a ceramic/metal composite material. Also disclosed is a method of making the improved composite material and articles made incorporating the material.
    Type: Application
    Filed: July 23, 2003
    Publication date: December 2, 2004
    Inventors: Michael C. Breslin, Andrew C. Strange, Michael E. Fuller
  • Patent number: 6506226
    Abstract: The invention relates to a hard metal or cermet body with a hard material phase consisting of WC and/or at least one carbide, nitride, carbonitride and/or oxicarbonitride of at least one of the elements from group IVa, Va, or VIa of the periodic table and a binding metal phase consisting of Fe, Co and/or Ni, said binding metal phase making up 3 to 25 mass %. In particular, WC crystallites should protrude beyond the hard metal or cermet surface of the by 2 to 20 &mgr;m in order to improve the adhesion of surface layers that are applied.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: January 14, 2003
    Assignee: Widia GmbH
    Inventors: Limin Chen, Walter Lengauer, Hans Werner Daub, Klaus Dreyer, Dieter Kassel, José Garcia, Georg Korb
  • Patent number: 6334914
    Abstract: Disclosed is a copper alloy sliding material comprising 0.5 to 15 mass % Sn and 0.1 to 10 vol % of hard particles consisting of one or more selected from WC, W2C and Mo2C. The hard particles have preferably an average particle size of 0.1 to 10 &mgr;m, whereby they are dispersed in the copper alloy matrix so as to make the sliding-contact surface uneven, from which the hard particles protrude partially. The sliding material comprises an amount or a total amount of not more than 40 mass % of one or more selected from Ni, Ag, Fe, Al, Zn, Mn, Co, Si and P, an amount or a total amount of not more than 10 mass % of Bi and/or Pb, and/or an amount or a total amount of not more than 10 vol % of a solid lubricant comprising BN, graphite, MoS2 and/or WS2.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: January 1, 2002
    Assignee: Daido Metal Company Ltd.
    Inventors: Kenji Sakai, Naohisa Kawakami, Satoru Kurimoto, Takashi Inaba, Koichi Yamamoto, Takayuki Shibayama
  • Patent number: 6322902
    Abstract: There are disclosed copper-base and/or iron-base contact materials which contain a Pb intermetallic compound dispersedly precipitated therein and which have highly improved sliding properties. Double layered contact elements improved in oil impregnation and lubricity are formed by sinter bonding the above contact materials to an iron-base metal backing, respectively. Economical producing methods for such double layered contact materials are also disclosed. In the copper-base and/or iron-base contact materials, one or more kinds of Pb intermetallic compounds are dispersedly precipitated.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: November 27, 2001
    Assignee: Komatsu Ltd.
    Inventors: Takemori Takayama, Yoshikiyo Tanaka
  • Patent number: 6299658
    Abstract: In a cemented carbide, at least one compound 3 including a carbide, a nitride or carbo-nitride of at least one component selected from IVa, Va and VIa group elements or a solid solution thereof exists in at least some WC crystal grains 1. Preferably the compound 3 is in the form of compound grains 3 comprising a carbide, a nitride or a carbo-nitride of Ti, Zr, Hf or W or a solid solution thereof, having an average grain diameter smaller than 0.3 &mgr;m. The compound grains make up at most 10% of the cross-sectional area of the WC crystal grains that contain the compound grains, while at least 10% of the total cross-sectional area of the cemented carbide is made up of such WC crystal grains that contain the compound grains.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: October 9, 2001
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hideki Moriguchi, Akihiko Ikegaya
  • Patent number: 6261329
    Abstract: A diamond sintered body having high wear resistance, chipping resistance, shock resistance and thermal conductivity is provided. The diamond sintered body includes sintered diamond particles and a sintering aid as the remainder. The content of the sintered diamond particles is at least 80% by volume and less than 99% by volume. The sintered diamond particles have a particle size in the range from at least 0.1 &mgr;m to at most 70 &mgr;m. The sintered diamond particles next to each other are directly bonded. The sintering aid includes at least one kind selected from tungsten, iron, cobalt and nickel. The percentage of the tungsten in the sintered body is in the range from at least 0.01% by weight to at most 8% by weight.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: July 17, 2001
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yasunobu Ogata, Satoru Kukino, Yasuyuki Kanada, Junichi Shiraishi, Tetsuo Nakai
  • Patent number: 6251157
    Abstract: A sintered alloy having superb wear resistance comprising: composite phases dispersed in a matrix of the sintered alloy; the composite phase consisting of; a particle group in which Cr carbide particles and Cr sulfide particles exist in a mixed condition; and a ferrite phase or a mixture phase of ferrite and austenite surrounding the particle group as a core.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: June 26, 2001
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventors: Yoshimasa Aoki, Koichiro Hayashi, Koichi Aonuma, Toru Tsuboi
  • Patent number: 6086980
    Abstract: A cemented carbide drill/endmill blank and method of manufacture thereof wherein the drill/endmill includes a core and a surrounding tube with improved technological properties. The difference in Co-content between the core and tube is 1-10 wt-% units and the cubic carbide content is 8-20 wt-% in the tube and 0.5-2 wt-% in the core.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: July 11, 2000
    Assignee: Sandvik AB
    Inventors: Stephen Foster, Gary McCarthy, Alistair Grearson, Helene Ouchterlony
  • Patent number: 6074454
    Abstract: The invention relates to bullets having increased frangibility (or which can be easily fragmented) and to materials and processes for the manufacture of such bullets. The bullets of the present invention are typically made from copper or copper alloy powders (including brass, bronze and dispersion strengthened copper) which are pressed and then sintered under conditions so as to obtain bullets with the desired level of frangibility. In preferred embodiments of the invention, the bullets also contain several additives that increase or decrease their frangibility.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: June 13, 2000
    Assignee: Delta Frangible Ammunition, LLC
    Inventors: John T. Abrams, Anil V. Nadkarni, Roy Kelly
  • Patent number: 6068913
    Abstract: A new PCD/PCBN tool and method for making the same involve the use of an intermediate layer of polycrystalline material between a substrate and an outer working layer. The intermediate layer is formulated to limit or prevent the amount of cobalt or other binders which may infiltrate the outer working layer and accelerate deterioration under high throughput conditions. In accordance with one aspect of the invention, the substrate is corrugate or rounded projections to both reduce stress and to decrease infiltration of cobalt through the polycrystalline structures. In accordance with another aspect of the invention, the bonding medium and/or binder agents in the intermediate layer may be selected to decrease mobility of cobalt and the like.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: May 30, 2000
    Assignee: Sid Co., Ltd.
    Inventors: Hyun Sam Cho, Kyung-Yul Han
  • Patent number: 5984996
    Abstract: Methods for the manufacture of nanostructured metals, metal carbides, and metal alloys are presented, such metals including nanostructured aluminum, chromium, iron, molybdenum, vanadium, and steel. Preferably, the nanostructured steel is of the M50 type, and comprises iron, molybdenum, chromium, vanadium and carbon. Synthesis of M50 steel further comprising nanostructured aluminum, aluminum oxide, or aluminum nitride is also described. In accordance with an important feature of this invention, the grain size of the metals and metal alloys is in the nanometer range. In accordance with the method of the present invention, the nanostructured metals, metal carbides, and metal alloys are prepared via chemical synthesis from aluminum, iron, molybdenum, chromium and vanadium starting materials. Decomposition of metal precursors or co-precipitation or precipitation of metal precursors is followed by consolidation of the resulting nanostructured powders.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: November 16, 1999
    Assignee: The University of Connecticut
    Inventors: Kenneth E. Gonsalves, Sri Prakash Rangarajan
  • Patent number: 5976213
    Abstract: A titanium-based carbonitride cutting tool insert with superior thermal shock resistance is disclosed. This is accomplished by sintering the material under conditions where the melting process is reversed. The melt forms in the center of the material first and the melting front propagates outwards towards the surface. This leads to minimal porosity and a macroscopic cobalt depletion towards the surface. The cobalt depletion, in turn, leads to a favorable compressive residual stress in the surface zone.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: November 2, 1999
    Assignee: Sandvik AB
    Inventors: Ulf Rolander, Gerold Weinl, Camilla Oden, Per Lindahl
  • 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: 5925404
    Abstract: The quantity of impurities in a magnetic material is decreased to produce a magnetic material with good quality, and a decrease in the cost of the magnetic material is realized by desulfurization. A magnetic raw material for metallic thin film magnetic recording media which contains sulfur more than 20 ppm is desulfurized to obtain the magnetic material for metallic thin film magnetic recording media with the sulfur content adjusted to 20 ppm or below, and a metallic thin film magnetic recording medium having a magnetic layer vaporized thereon with the magnetic material is fabricated.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: July 20, 1999
    Assignee: Sony Corporation
    Inventors: Kazunobu Chiba, Tustomu Takeda, Hiroyuki Yamada, Hideo Katagiri, Hiroshi Osumi
  • Patent number: 5918103
    Abstract: Disclosed are a plate-crystalline tungsten carbide-containing hard alloy which comprises 4 to 40% by volume of a binder phase containing at least one of iron group metals selected from Co, Ni and Fe as a main component; and the balance of a hard phase comprising tungsten carbide alone, or tungsten carbide and 50% by volume or less of a compound with a cubic structure selected from at least one of carbide and nitride of the 4a (Ti, Zr and Hf), 5a (V, Nb and Ta) or 6a (Cr, Mo and W) group element of the periodic table and mutual solid solutions thereof, and inevitable impurities,wherein when peak intensities at a (001) face and a (101) face in X-ray diffraction using K.alpha. rays with Cu being a target are represented by h(001) and h(101), respectively, the tungsten carbide satisfies h(001)/h(101).gtoreq.0.50, a composition for forming a plate-crystalline tungsten carbide, and a process for preparing the plate-crystalline tungsten carbide-containing hard alloy.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: June 29, 1999
    Assignee: Toshiba Tungaloy Co., Ltd.
    Inventors: Masaki Kobayashi, Kozo Kitamura, Satoshi Kinoshita
  • Patent number: 5865912
    Abstract: Described herein is an SiC-reinforced aluminum alloy composite material of the type having silicon carbide uniformly dispersed in an aluminum alloy matrix containing magnesium as a strengthening element, characterized in that the composite material contains Al4C3 in an amount smaller than 0.5 wt % and residual oxygen in an amount smaller than 0.4 wt %, and has a modulus of elasticity higher than 9000 kgf/mm.sup.2.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: February 2, 1999
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Hiroyuki Morimoto, Kenichiro Ouchi, Hiroshi Iwamura
  • Patent number: 5789686
    Abstract: Methods for making, methods for using and articles comprising cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two regions exhibiting at least one property that differs are discussed. Preferably, the cermets further exhibit a portion that is binder rich and which gradually or smoothly transitions to at least a second region. The multiple-region cermets are particularly useful in compressively loaded application wherein a tensile stress or fatigue limit might otherwise be excessive for monolithic articles. The cermets are manufactured by juxtaposing and densifying at least two powder blends having different properties (e.g., differential carbide grain size, differential carbide chemistry, differential binder content, differential binder chemistry, or any combination of the preceding).
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: August 4, 1998
    Assignee: Kennametal Inc.
    Inventors: Ted R. Massa, John S. Van Kirk, Robert R. McNaughton, Jr.
  • Patent number: 5758253
    Abstract: A process for producing sintered titanium-graphite having improved wear resistance and low frictional characteristics is described. The said process which produces titanium-graphite composites having a triphasic structure with controlled porosity and a graphite lubricating film, comprises sintering a mixture of titanium and graphite powders in which the percentage of graphite may vary from 4 to 8 percent at temperatures from about 800.degree. C. to 1600.degree. C., for about 1/2 to 2 hours, under a compaction pressure of 0.17 to 0.62 MPa. The composites have applications in biomedical engineering and other fields of engineering due to their biocompatibility, strength and improved wear resistance.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: May 26, 1998
    Assignee: National University of Singapore
    Inventors: Swee Hin Teoh, Rajendran Thampuran, James Cho Hong Goh, Winston Kar Heng Seah
  • Patent number: 5733664
    Abstract: A matrix powder for formation along with an infiltrant into a matrix for use as a wear element or for use in retaining at least one discrete hard element. The matrix powder includes crushed sintered cemented tungsten carbide particles. The composition of the crushed sintered cemented tungsten carbide comprises between about 6 weight percent and about 13 weight percent binder metal and between about 87 weight percent and about 94 weight percent tungsten carbide.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: March 31, 1998
    Assignee: Kennametal Inc.
    Inventors: Harold E. Kelley, William E. Silvis, Charles J. Terry, Gary R. Peterson
  • Patent number: 5670726
    Abstract: In order to improve the toughness characteristics of a cermet alloy, while retaining high resistance to wear, a composition is disclosed which contains 30 to 60% by weight of Ti, 5 to 20% by weight of W, 5 to 15% by weight of Ta, in which up to 70% of the Ta can be replaced by Nb, and 5 to 25% by weight of Ni and/or Co binder with more than 80 mole %, relative to the above transition elements of carbon and nitrogen. The composition is prepared by grinding, compressing and sintering a solid, powder-form mixture containing (Ti,W,Ta,Nb)C powder, Ti(C,N) powder, and WC powder, each powder having a particle size <1.5 .mu.m, plus Ni powder and/or Co powder. The mixture includes the following ingredients: (a) (Ti,W,Ta,Nb)C with a mean particle size <1.5 .mu.m, this mixed carbide containing 20 to 50% by weight of TiC, 20 to 40% by weight of WC, and 20 to 40% by weight of (Ta, Nb)C; (b) Ti(C,N), with a mean particle size <1.5 .mu.m and an N/(C+N) ratio <0.7; WC with a mean particle size <1.5 .mu.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: September 23, 1997
    Assignee: Widia GmbH
    Inventors: Hans Kolaska, Klaus Dreyer
  • Patent number: 5610347
    Abstract: The invention relates to a material for electric contacts taking silver tin-oxide as basis, consisting of silver or mainly silver-containing alloy, tin oxide and other oxides or carbides of tungsten, molybdenum, vanadium, bismuth, titanium, and/or copper.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: March 11, 1997
    Assignee: Doduco GmbH & Co. Dr. Eugen Durrwachter
    Inventors: Volker Behrens, Thomas Honig, Andreas Kraus, Karl E. Saeger, Rainer Schmidberger, Theodor Staneff
  • Patent number: 5561829
    Abstract: A method of preparing a metal alloy product from a powder blend. The method comprising: (a) cold pressing a blend to form a compact, the metal blend comprising a metal powder phase and at least one reinforcement phase having a hardness greater than the metal phase; (b) heating the compact to form a preheated compact; and (c) hot working the heated compact. In a preferred method, the powder metal blend comprises 50 to 90 vol. % of an aluminum alloy powder and 10 to 50 vol. % of silicon carbide; the heating of the compact perforated in a nitrogen atmosphere to form a preheated compact; and the extruded hot compact is hot worked. Hot working may take the form of forging, rolling, upset forging, exuding, compacting or other processes known in the art.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: October 1, 1996
    Assignee: Aluminum Company of America
    Inventors: Ralph R. Sawtell, Warren H. Hunt, Jr., Thomas J. Rodjom, Erik J. Hilinski, John H. Milsom
  • Patent number: 5520716
    Abstract: An Al.sub.2 O.sub.3 -TiC sintered product comprising Al.sub.2 O.sub.3 as a main component and containing TiC in an amount of from 20 to 40% by weight, wherein the average particle diameter of Al.sub.2 O.sub.3 particles in the sintered product is larger by 5 to 50% than the average particle diameter of TiC particles, the average particle diameter of the sintered product as a whole is not larger than 1 .mu.m, the average particle diameter of TiC particles is not larger than 0.9 .mu.m, and the total amount of the grain boundary phases other than Al.sub.2 O.sub.3 and TiC is not larger than 1.0% by weight. The Al.sub.2 O.sub.3 -TiC sintered product can be used as a substrate 1 for a magnetic head, and has portions such as grooves 4 and stepped portions formed in the surface of the air bearing surface 2 of the slider by being irradiated with ions. The sintered product exhibits excellent surface quality after machined by being irradiated with ions and can be machined at an increased rate.
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: May 28, 1996
    Assignee: Kyocera Corporation
    Inventors: Nobuoki Takagi, Hiroki Tokunaga, Shinichiro Masuyama
  • Patent number: 5500289
    Abstract: A sinterable powder mix for the production of a tungsten-based cemented carbide material, said powder mix comprising at least 70% by weight of WC, from about 2 to about 15% by weight of an iron group metal binder, and optionally up to about 15% by weight of one or more carbides, nitrides and carbonitrides of metals of the groups IVb, Vb and VIb of the periodic table; characterized in thatsaid powder mix comprises from about 1 to about 8% by weight of Ta(Nb) oxide and powdered elemental carbon in about the stoichiometric amount required for the reaction:Ta(Nb).sub.2 O.sub.5 +7C.fwdarw.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: March 19, 1996
    Assignee: ISCAR Ltd.
    Inventor: Ilan Gavish
  • Patent number: 5460640
    Abstract: A fully dense ceramic-metal body including 40-88 v/o of an oxide hard phase of, in v/o of the body, 4-88 v/o M-aluminum binary oxides, where the binary oxide has a C-type rare earth, garnet, .beta.-MAl.sub.11 O.sub.18, or perovskite crystal structure, and M is a lanthanide or indium, and 0-79 v/o .alpha.-alumina; about 10-50 v/o of a hard refractory carbide, nitride, or boride as a reinforcing phase; and about 2-10 v/o of a dispersed metal phase combining Ni and Al mostly segregated at triple points of the microstructure. The preferred metal phase contains a substantial amount of the Ni.sub.3 Al ordered crystal structure. In the preferred body, the reinforcing phase is silicon carbide partially incorporated into the oxide grains, and bridges the grain boundaries. The body including a segregated metal phase is produced by densifying a mixture of the hard phase components and the metal component, with the metal component being present in the starting formulation as Ni powder and Al powder.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: October 24, 1995
    Assignee: Valenite Inc.
    Inventor: Sergej-Tomislav Buljan
  • Patent number: 5443615
    Abstract: A method of producing a molded ceramic article comprises the first step mixing powdery raw materials and a liquid additive, thereby obtaining a mixed raw material, the second step press-molding the mixed raw material obtained in the first step in a hydrostatically applied condition of pressure, thereby removing an excess of the liquid additive to obtain a preform, and the third step calcining the preform obtained in the second step to obtain a molded ceramic article. The molded ceramic article comprises, as a principal component, copper and, as essential components, Cr and Ni within composition ranges of 0.1.ltoreq.Cr<2 wt. % and 0.1.ltoreq.Ni<10 wt. % and further at least one additive component selected from the group consisting of the following composition ratios: the following composition ratios: 0<Fe<5 wt. %, 0.ltoreq.Co<5 wt. %, 0.ltoreq.Al<10 wt. % 0.ltoreq.Ti<20 wt. %, 0.ltoreq.Mo<3 wt. %, 0.ltoreq.Si<3 wt. % 0.ltoreq.V<3 wt. % 0.ltoreq.Mg<1 wt. % and 0.ltoreq.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: August 22, 1995
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mitsuo Kuwabara, Kiyoshi Ikegami, Teruaki Yoshida, Koji Takahashi, Tamotsu Harada, Takeshi Komiyama, Fumio Hirai, Masamichi Hayashi
  • Patent number: 5395700
    Abstract: In this invention, a cutting tool comprises two layers of hard sintered compact of cBN. The first sintered compact layer comprises about 75-98% by volume of cBN and a first binder material. The first binder material comprises from about 1 to out 40% by weight of Al. The second sintered compact layer comprises from about 40 to about 65% by volume of cBN and a second binder material. The second binder material comprises about 2 to about 30% by weight of Al. The first sintered compact layer is bonded to the second sintered compact layer. This composite material is bonded directly or indirectly to a tool holder to form a cutting tool. The first sintered compact layer constitutes a rake face of the cutting tool.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: March 7, 1995
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Tetsuo Nakai, Mitsuhiro Goto
  • Patent number: 5370719
    Abstract: A TiCN-based cermet cutting insert superior in toughness with improved wear resistance includes a binding phase and at least two hard dispersion phases. One hard dispersion phases includes a core of TiCN while the other hard dispersion phases includes a core of a carbonitride solid solution of Ti and one of a V,Hf,Cr, Ta,Nb, Zr, W and Mo.
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: December 6, 1994
    Assignee: Mitsubishi Materials Corporation
    Inventors: Kiyohiro Teruuchi, Fumihiro Ueda, Niro Odani
  • Patent number: 5348808
    Abstract: In a hard sintered cutting tool, the tool life can be further increased. In this hard sintered body cutting tool, a rake face of an edge portion is formed by a major surface of a first sintered body layer containing at least 80 percent by volume and less than 98 percent by volume of diamond, while a flank of the edge portion is formed by a second sintered body layer containing at least 30 percent by volume and less than 75 percent by volume of cubic boron nitride (CBN). The first sintered body layer is formed to have a thickness of at least 0.02 mm and less than 0.1 mm, and to be in a thickness ratio of at least 1:5 to the second sintered body layer. Thus, chipping resistance of the rake face is improved by the first sintered body layer, while wear resistance of the flank is improved by the second sintered body layer. As a result, it is possible to suppress progress of local wear and chipping, whereby the life of the cutting tool is increased as compared with the prior art.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: September 20, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Mitsuhiro Goto, Tetsuo Nakai
  • Patent number: 5330553
    Abstract: A sintered titanium-based carbonitride alloy contains hard constituents based on, in addition to Ti, W and/or Mo, one or more of the metals Zr, Hf, V, Nb, Ta or Cr in 5-30% binder phase based on Cobalt and/or nickel. The content of tungsten and/or molybdenum, preferably molybdenum in the binder phase is >1.5 times higher than in the rim and >3.5 times higher than in the core of adjacent hard constituent grains. The alloy is produced by a particular method.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: July 19, 1994
    Assignee: Sandvik AB
    Inventors: Gerold Weinl, Rolf G. Oskarsson, Per Gustafsson
  • Patent number: 5294239
    Abstract: In section bars and shaped bodies made of nickel-base superalloys having a structure consisting of columnar grains, a complete recrystallization cannot be effected unless the heating-up rate is kept below a maximum heating-up rate T.sub.max, which depends on the ratio V of one or more of the metal carbide-forming elements hafnium, niobium, tantalum, titanium and zirconium to one or both of the metal carbide-forming elements tungsten and molybdenum.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: March 15, 1994
    Assignee: PM Hochtemperatur-Metall GmbH
    Inventors: Klaus Zoltzer, Klaus Lempenauer, Hellmut Fischmeister
  • Patent number: 5279638
    Abstract: A Cu-Sn based sintered material, having an improved wear-resistance is obtained by adding from 0.1 to 30% of at least one hard matter(s) selected from the groups consisting of (a), (b), and (c) wherein (a), (b) and (c) are:(a) Fe.sub.2 P, Fe.sub.3 P, FeB, Fe.sub.2 B, Mo, Co, Co-based self-fluxing alloy, and Ni-based self-fluxing alloy;(b) SiC, TiC, WC, B.sub.4 C, TiN, cubic BN, Si.sub.3 N.sub.4, SiO.sub.2, ZrO.sub.2, and Al.sub.2 O.sub.3 ; and(c) Si-Mn, Cu-Si, and FeS.
    Type: Grant
    Filed: February 26, 1991
    Date of Patent: January 18, 1994
    Assignee: Taiho Kogyo Co., Ltd.
    Inventors: Eiji Asada, Hiromi Ogino
  • Patent number: 5271758
    Abstract: A dense cermet article including about 44-93% of a granular first hard phase, about 4-44% of a granular second hard phase, and about 2-20% of a metal phase, all expressed in % by volume. The first hard phase consists essentially of alumina and from 0% to less than 5% of one or more oxides selected from magnesia, zirconia, yttria, hafnia, and silica. The second hard phase consists essentially of a hard refractory carbide, nitride, or boride, or mixture or solid solution thereof. Preferred materials for inclusion in the second hard phase are titanium carbide, hafnium carbide, tantalum carbide, tantalum nitride, tungsten carbide, titanium diboride, and boron carbide. The metal phase consists essentially of a combination of nickel and aluminum having a ratio of nickel to aluminum of from about 85:15 to about 88:12, and 0-5% of an additive selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, cobalt, boron, and/or carbon.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: December 21, 1993
    Assignee: Valenite Inc.
    Inventors: Sergej T. Buljan, Helmut Lingertat, Steven F. Wayne
  • Patent number: 5248352
    Abstract: There can be provided a TiC-base cermet alloy whose hardness is equal to or higher than that of a Ti(C, N)-base cermet alloy and which is excellent in toughness by strengtening the binder phase of the TiC-Base cermet alloy which does not involve the problem of denifrification at the time of sintering. The titanium-carbide-base cermet alloy comprises a hard phase which contains titanium carbide as a main component and a binder phase which contains one or both of Co and Ni as main components, wherein amounts of Ti and Mo in the binder phase satisfy the conditions, by weight T: 0.85.ltoreq.Mo (wt. %)/Ti (wt. %), and 6 wt. %.ltoreq.[Ti +Mo].
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: September 28, 1993
    Assignees: Hitachi Metals, Ltd., Hitachi Tool Engineering, Ltd.
    Inventors: Yuichi Nakahara, Katsuhiko Kojo
  • Patent number: 5209772
    Abstract: A dispersion-strengthened (DS) alloy, more particularly oxide-dispersion-strengthened (ODS) iron-based alloys which manifest resistant to oxidation at temperatures as high as 1300.degree. C. (approx. 2400.degree. F.) whereby the alloys are useful in the production of advanced aircraft gas turbine engine components and in demanding industrial applications.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: May 11, 1993
    Assignee: Inco Alloys International, Inc.
    Inventors: Raymond C. Benn, Gaylord D. Smith, John J. Fischer
  • Patent number: 5181953
    Abstract: A coated cemented carbide alloy, excellent in toughness as well as wear resistance and which is used for cutting tools and wear resistance tools is provided herein. This coated cemented carbide alloy is composed of a cemented carbide substrate consisting of a hard phase of at least one member selected from carbides, nitrides and carbonitrides of Group IVb, Vb and VIb metals of the Periodic Table and a binder phase consisting of at least one member selected from the iron group metals, and a monolayer or multilayer, provided on the substrate consisting of at least one member selected from carbides, nitrides, oxides and borides of Group IVb, Vb and VIb metals of Periodic Table, solid solutions thereof and aluminum oxide, and wherein a binder phase-enriched layer is provided in a space 0.01 mm and 2 mm below the surface of the substrate with A-type and/or B-type pores inside the binder phase-enriched layer.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: January 26, 1993
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Minoru Nakano, Toshio Nomura
  • Patent number: 5173107
    Abstract: The invention relates to a composite hard metal body of hard material, a binder and embedded reinforcing material, as well as to a process for the production of the composite hard metal body by methods of powder metallurgy.In order to create a composite hard metal body with improved toughness under load, improved hardness and a lower fracture susceptibility, the invention proposes to build in monocrystalline, preferably needle-shaped and/or platelet-shaped reinforcing materials, coated with an inert layer with respect to the binder metal phase and consisting of borides and/or carbides, and/or nitrides and/or carbonitrides of the elements of Groups IVa or Va or mixtures thereof and/or coated monocrystalline reinforcing material of SiC, Si.sub.3 N.sub.4, Si.sub.2 N.sub.2 O, Al.sub.2 O.sub.3, ZrO.sub.2, AlN and/or BN.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: December 22, 1992
    Assignee: Krupp Widia GmbH
    Inventors: Klaus Dreyer, Hans Kolaska
  • Patent number: 5162064
    Abstract: A permanent magnet of the neodymium-iron-boron type having improved corrosion resistance imparted by a combination of oxygen, carbon and nitrogen. Oxygen is provided in an amount equal to or greater than 0.6 weight percent in combination with carbon of 0.05-0.15 weight percent and nitrogen 0.15 weight percent maximum. Preferably, oxygen is within the range of 0.6-1.2% with carbon of 0.05-0.1% and nitrogen 0.02-0.15 weight percent or more preferably 0.04-0.08 weight percent. The magnet may be heated in an argon atmosphere and thereafter quenched in an atmosphere of either argon or nitrogen to further improve the corrosion resistance of the magnet.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: November 10, 1992
    Assignee: Crucible Materials Corporation
    Inventors: Andrew S. Kim, Floyd E. Camp, Edward J. Dulis