Carbon(c) Associated With More Than One Metal Patents (Class 75/241)
  • Patent number: 10273838
    Abstract: Provided is a valve seat insert made of an iron-base sintered alloy, in which a base matrix part that includes a base matrix phase and hard particles, has a base matrix part composition containing, in % by mass, 0.5%-2.0% of carbon and 10%-70% in total of one kind or two or more kinds selected from nickel, cobalt, chromium, molybdenum, vanadium, tungsten, manganese, silicon and sulfur, with the balance being iron and unavoidable impurities, and Co-base hard particles having a composition containing, 1.0% or less of C, 25%-50% of Mo, 5%-15% of Cr, Si as an impurity in a content adjusted to be 0.3% or less, with the balance being Co, and having a Vickers hardness of 500 to 1,500 HV, are dispersed as hard particles in the base matrix phase in an amount of 10%-60% by mass with respect to the total amount of the valve seat insert.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: April 30, 2019
    Assignees: NIPPON PISTON RING CO., LTD., HONDA MOTOR CO., LTD., SANYO SPECIAL STEEL CO., LTD.
    Inventors: Satoshi Ikemi, Hiroshi Oshige, Seisuke Takaki, Tomoki Okita, Keisuke Ishii, Toshiyuki Sawada, Hiroyuki Hasegawa
  • Patent number: 9850558
    Abstract: A cermet contains hard phase particles containing Ti and a binding phase containing at least one of Ni and Co, and 70% or more (by number) of the hard phase particles have a cored structure containing a core and a peripheral portion around the core. The core is composed mainly of at least one of Ti carbide, Ti nitride, and Ti carbonitride, and the peripheral portion is composed mainly of a Ti composite compound containing Ti and at least one selected from W, Mo, Ta, Nb, and Cr. The core has an average particle size ?, the peripheral portion has an average particle size ?, and ? and ? satisfy 1.1??/??1.7.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: December 26, 2017
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takato Yamanishi, Masato Michiuchi, Keiichi Tsuda
  • Patent number: 9850557
    Abstract: A cermet contains hard phase particles containing Ti and a binding phase containing at least one of Ni and Co. 70% or more of the hard phase particles have a cored structure containing a core and a peripheral portion around the core. The core is composed mainly of at least one of Ti carbide, Ti nitride, and Ti carbonitride. The peripheral portion is composed mainly of a Ti composite compound containing Ti and at least one selected from W, Mo, Ta, Nb, and Cr. The core has an average particle size ?, the peripheral portion has an average particle size ?, and ? and ? satisfy 1.1??/??1.7. The hard phase particles in the cermet have an average particle size of more than 1.0 ?m.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: December 26, 2017
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takato Yamanishi, Keiichi Tsuda
  • Patent number: 9175584
    Abstract: A sintered alloy for a valve seat may be manufactured using a method including: mixing MnS with an alloy powder for a valve seat including C at 0.8-1.2 wt %, Ni at 2.0-4.5 wt %, Cr at 3.0-5.0 wt %, Mo at 16.0-20.0 wt %, Co at 9.0-13.0 wt %, V at 0.05-0.15 wt %, S at 0.2-0.8 wt %, Fe, and additional inevitable impurities; making a first shape by forming the mixed materials; pre-sintering the first formed shape; making a secondary shape by re-pressing the first pre-sintered shape; main-sintering the secondary shape; and tempering the main-sintered secondary shape.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: November 3, 2015
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Philgi Lee, Gyuhwan Kim, Jae Suk Park, Ki Bum Kim, Chang-Jin Shin
  • Patent number: 8893829
    Abstract: A polycrystalline compact comprises a plurality of grains of hard material and a plurality of nanoparticles disposed in interstitial spaces between the plurality of grains of hard material. The plurality of nanoparticles has a thermal conductivity less than a thermal conductivity of the plurality of grains of hard material. An earth-boring tool comprises such a polycrystalline compact. A method of forming a polycrystalline compact comprises combining a plurality of hard particles and a plurality of nanoparticles to form a mixture and sintering the mixture to form a polycrystalline hard material comprising a plurality of interbonded grains of hard material. A method of forming a cutting element comprises infiltrating interstitial spaces between interbonded grains of hard material in a polycrystalline material with a plurality of nanoparticles. The plurality of nanoparticles have a lower thermal conductivity than the interbonded grains of hard material.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: November 25, 2014
    Assignee: Baker Hughes Incorporated
    Inventor: Anthony A. DiGiovanni
  • Patent number: 8834594
    Abstract: In one aspect, cemented carbide bodies are provided. A cemented carbide body described herein, in some embodiments, comprises a tungsten carbide phase, a binder phase comprising at least one metal of the iron group or an alloy thereof, a solid solution phase of carbides of zirconium and niobium (Zr,Nb)C and cubic carbides in an amount ranging from about 0.5 volume percent to about 6 volume percent.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: September 16, 2014
    Assignee: Kennametal Inc.
    Inventors: Guenter Johann Roder, Anders Evert Petersson, Charles Graham McNerny, Pankaj Kumar Mehrotra
  • Publication number: 20140130698
    Abstract: The present invention relates to a composite material for the production of ecological ammunition characterized in that it comprises a) a metal matrix formed by a zinc and bismuth alloy, zinc and aluminum alloy, tin and bismuth alloy or zinc and tin alloy and a metal selected from aluminum, bismuth and the combination thereof and b) reinforcing metal particles distributed therein selected from wolframium, ferro-wolframium, ferro-wolframium carbides, wolframium carbides, wolframium oxides and ferro-wolframium oxides, subjected to oxidation before being added to the metal matrix.
    Type: Application
    Filed: June 8, 2012
    Publication date: May 15, 2014
    Applicant: REAL FEDERACION ESPANOLA DE CAZA
    Inventors: Javier Francisco Perez Trujillo, Pilar Maria Hierro De Bengoa, Isabel Maria Lasanta Carrasco, Marta Tejero Garcia, Aito Rey Bonet, Gabriel Angel Fernandez Diaz-Carralero
  • Patent number: 8283046
    Abstract: A ferrous sintered multilayer roll-formed bushing having a ferrous sintered sliding material layer which is sinter-bonded to a back metal steel, wherein the ferrous sintered sliding material layer is produced in such a manner that a Fe—C—Cu—Sn based sintered sliding material mixed powder containing at least carbon of 0.40 to 15 wt %, Cu of 13 to 40 wt % and Sn of 0.5 to 10 wt % is preliminarily sinter-bonded to said back metal steel and then finally sinter-bonded by a liquid-phase sintering at high temperatures higher than 1000° C. after bending into a roll.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: October 9, 2012
    Assignee: Komatsu Ltd.
    Inventor: Takemori Takayama
  • Patent number: 8277959
    Abstract: The present invention relates to a method of producing a cemented carbide body comprising providing: (1) a grain refiner compound comprising a grain refiner and carbon and/or nitrogen, and, (2) a grain growth promoter, on at least one portion of the surface of a compact of a WC-based starting material comprising one or more hard-phase components and a binder, and then sintering the compact. The invention also relates to a cemented carbide body comprising a WC-based hard phase and a binder phase, wherein at least one part of an intermediate surface zone has a lower average binder content than a part further into the body, and at least one part of an upper surface zone has in average a larger average WC grain size than the intermediate surface zone. The cemented carbide body can be used as a cutting tool insert for metal machining, an insert for a mining tool, or a coldforming tool.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: October 2, 2012
    Assignee: Sandvik Intellectual Property AB
    Inventor: Ioannis Arvanitidis
  • Publication number: 20120063943
    Abstract: Provided are a composite powder of a metal and carbide (carbonitride) for a structural material, a sintered body, and methods of preparing the composite powder and sintered body. The composite powder for a structural member has a composition of M1-x % M2C, M1-x % (M2,M1)C, M1-x % M2(CN), or M1-x % (M2,M1)(CN). A matrix-phase metal M1 is one selected from tungsten (W) and molybdenum (Mo) of the periodic table of the elements, an accessory-phase metal M2 is one selected from the group consisting of Group-IV to Group-VI metals of the periodic table of the elements and forms a carbide or carbonitride having an average particle size of about 1 ?m or less, and the matrix-phase metal M1 and the accessory-phase metal M2 coexist due to a reaction.
    Type: Application
    Filed: September 28, 2009
    Publication date: March 15, 2012
    Applicant: SNU R&DB FOUNDATION
    Inventor: Shinhoo Kang
  • Patent number: 8128867
    Abstract: A method for producing a cemented carbide material includes producing an M3C type double carbide (wherein M comprises M1 and M2; M1 represents one or more elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W; and M2 represents one or more elements selected from the group consisting of Fe, Co and Ni) as a main component of the surface portion; reducing heat treating the compact at a vacuum atmosphere; carburizing the resulting WC—Co compact at a temperature of 800 to 1100° C.; subjecting the carburized compact to liquid phase sintering at a temperature of more than 1350° C. to form a sintered body; and coating a surface layer of the sintered body with a compound containing boron and/or silicon and subjecting the coated sintered body to a diffusion heat treatment at a temperature within a range from 1200 to 1350° C.
    Type: Grant
    Filed: January 3, 2011
    Date of Patent: March 6, 2012
    Assignee: Sanalloy Industry Co., Ltd.
    Inventors: Masahiro Iwasaki, Hidefumi Yanagita, Masaaki Ikebe
  • Patent number: 8083831
    Abstract: The present invention relates to a lightweight, anti-scratch and fracture resistant material for use in manufacture of jewelry prepared by sintering a powered mixture consisting essentially of 20% by weight of titanium carbide, 25% by weight of tungsten carbide, 35% by weight of titanium nitride, and balance being a binder consisting essentially of nickel, molybdenum and cobalt.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: December 27, 2011
    Assignee: BTR Limited
    Inventor: Zhijian Xia
  • Patent number: 7998238
    Abstract: A sintered sliding member comprises a back metal (21a) and a ferrous sintered sliding body (20) which is sintering-bonded to the back metal (21a). The ferrous sintered sliding body (20) has martensite phase having a solid soluble carbon concentration of 0.15 to 0.5 wt % and contains carbide in a content of 5 to 50% by volume. The sintered sliding member is excellent in abrasion resistance, seizing resistance and heat crack resistance.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: August 16, 2011
    Assignee: Komatsu Ltd.
    Inventors: Takemori Takayama, Tetsuo Ohnishi, Kazuo Okamura
  • Patent number: 7892315
    Abstract: Disclosed are a solid-solution powder, a method for preparing the solid-solution powder, a cermet powder including the solid-solution powder, a method for preparing the cermet powder, a cermet using the cermet powder and a method to prepare the cermet. According to the present invention, the problem of low toughness due to high hardness that conventional cermets (especially TiC or Ti(CN) based cermet) have is resolved because a complete solid-solution phase without core/rim structure is provided to the cermets as a microstructure thereof, and in which further increased the hardness as well as the toughness, thereby substantially and considerably increasing general mechanical properties of materials using the cermet, and thus substituting WC—Co hard material and allowing manufacturing of cutting tools with high hardness and toughness.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: February 22, 2011
    Assignee: Seoul National University Industry Foundation
    Inventor: Shinhoo Kang
  • Patent number: 7887747
    Abstract: The present invention provides a WC—Co system (the WC—Co system in the present invention means that it comprises not only hard grains composed mainly of WC and iron group metal powder containing Co, but also at least one kind selected from carbide, nitride, carbonitride and boride of elements in Groups IVa, Va and VIa of the Periodic Table, excluding WC, as hard grains) cemented carbide having high strength and high toughness which is excellent in wear resistance, toughness, chipping resistance and thermal crack resistance.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: February 15, 2011
    Assignee: Sanalloy Industry Co., Ltd.
    Inventors: Masahiro Iwasaki, Hidefumi Yanagita, Masaaki Ikebe
  • 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
  • Patent number: 7794830
    Abstract: The present invention relates to a cutting tool insert for turning consisting of a cemented carbide substrate and a coating. The cemented carbide substrate comprises WC, binder phase, and vanadium containing cubic carbide phase with a binder phase enriched surface zone essentially free of cubic carbide phase. The thermal properties of the vanadium-containing cubic phase, has turned out to give excellent resistance to thermal cracking of the insert.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: September 14, 2010
    Assignee: Sandvik Intellectual Property AB
    Inventors: Alexandra Kusoffsky, Susanne Norgren
  • Publication number: 20100074788
    Abstract: The invention is suitable for the manufacture of flat or shaped titanium matrix composite articles having improved mechanical properties such as lightweight plates and sheets for aircraft and automotive applications, etc. The method for manufacturing TMCC is comprised of the following steps: (a) preparing a basic powdered blend containing matrix alloy or titanium powders, dispersing ceramic and/or intermetallic powders, and powders of said complex carbide- and/or silicide particles, (b) preparing the Al—V master alloy containing ?5 wt. % of iron, (c) preparing the Al—V—Fe master alloy fine powder having a particle size of ?20 ?m, (d) mixing the basic powdered blend with the master alloy powder to obtain a chemical composition of TMCC, (e) compacting the powder mixture at room temperature, (f) sintering at the temperature which provides at least partial dissolution of dispersed powders, (g) forging at 1500-2300° F., and (h) cooling.
    Type: Application
    Filed: November 19, 2009
    Publication date: March 25, 2010
    Applicant: Advance Material Products Inc.(ADMA Products, Inc.)
    Inventors: Vladimir S. Moxson, Volodymyr A. Duz, Alexander E. Shapiro
  • Patent number: 7588620
    Abstract: A cutting tool comprised of a cemented carbide is provided. The cemented carbide is consisted of a composition including: a predetermined amount of at least one selected from specific carbide, nitride, and carbon nitride, except for cobalt and niobium; 0.01 to 0.08 mass % of oxygen; and the rest consisted of tungsten carbide and unavoidable impurities. The cemented carbide is further made up of a structure in which a tungsten carbide phase and a B1-type solid solution phase being expressed by M(CNO) or M(CO) where “M” is at least one selected from the group consisting of metals of the group IV, V, and VI in the periodic table, containing niobium as being essential, and containing oxygen at a rate of 1 to 4 atomic % are bound by a binder phase composed mainly of the cobalt. This achieves the cutting tool having a long tool life in high-speed interrupted cutting.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: September 15, 2009
    Assignee: Kyocera Corporation
    Inventor: Takahito Tanibuchi
  • Patent number: 7572313
    Abstract: A turbomachinery component includes a substrate having a surface, the surface consisting essentially of at least one composite of at least one metal and at least one compound having the chemical formula Mn+1AXn, wherein M is at least one early transition metal selected from groups IIIB, IVB, VB, and VIB, A is at least one element selected from groups IIIA, IVA, VA, VIA, and VIIA, X is one or both of carbon and nitrogen, and n is an integer between 1 and 3. The component is made by compressing a powdered material to form a substrate that consists essentially of the composite and sintering the substrate, or by coating a substrate with the composite.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: August 11, 2009
    Assignee: Drexel University
    Inventors: Thirumalai G. Palanisamy, Surojit Gupta, Michel Barsoum, Chien-Wei Li
  • Patent number: 7479469
    Abstract: Provided is a process for producing electrode catalyst fine particles capable of affording formed catalysts such as membranes excellent in uniformity and strength and also employable as catalyst to exhibit high catalytic activity over long periods because fine metal particles are highly distributed on carriers to make particle growth or the like less likely to occur. Electrode catalyst fine particles comprise fine particles which have an average particle diameter of 10 nm to 10 ?m and in which fine metal particles are supported on carrier particles, wherein a potential difference (absolute value of (II) minus (I)) between a flow potential (I) of a water dispersion of the fine metal particles at 1 wt % concentration and a pH of 3 to 8 and a flow potential (II) of a water dispersion of the carrier particles at 1 wt % concentration and a pH of 4 to 10, is in the range of 10 to 3000 mV.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: January 20, 2009
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Yoichi Ishihara, Toshiharu Hirai, Michio Komatsu
  • Publication number: 20070227298
    Abstract: A cutting tool comprised of a cemented carbide is provided. The cemented carbide is consisted of a composition including: a predetermined amount of at least one selected from specific carbide, nitride, and carbon nitride, except for cobalt and niobium; 0.01 to 0.08 mass % of oxygen; and the rest consisted of tungsten carbide and unavoidable impurities. The cemented carbide is further made up of a structure in which a tungsten carbide phase and a B1-type solid solution phase being expressed by M(CNO) or M(CO) where “M” is at least one selected from the group consisting of metals of the group IV, V, and VI in the periodic table, containing niobium as being essential, and containing oxygen at a rate of 1 to 4 atomic % are bound by a binder phase composed mainly of the cobalt. This achieves the cutting tool having a long tool life in high-speed interrupted cutting.
    Type: Application
    Filed: March 26, 2007
    Publication date: October 4, 2007
    Applicant: KYOCERA CORPORATION
    Inventor: Takahito Tanibuchi
  • Patent number: 7244519
    Abstract: The present invention relates to the PVD coated tungsten carbide (WC) based cemented cutting inserts with ruthenium (Ru) as a key chemical element, or a key feature, in the cobalt (Co)-based binder phase, particularly useful for machining today's mold & die materials. In the Ru—Co mixed binder phase in the tungsten carbide substrate, the ratio of Ru/Co is at least 3%, by weight. The Ru-featured carbide cutting insert provided in this invention is PVD coated with one or more layers by a modern PVD coating technology. The development of the PVD coated Ru-featured carbide cutting inserts provided in this invention is based on a discovery that the unique combination of PVD coating techniques and Ru-featured carbide cutting inserts demonstrates superior machining performance in today's mold & die machining applications.
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: July 17, 2007
    Assignee: TDy Industries, Inc.
    Inventors: Gilles Festeau, X. Daniel Fang, David J. Wills
  • Patent number: 7179319
    Abstract: The invention proposes a fine grained sintered cemented carbide containing chromium and based on WC and a binder based on Co or CoNiFe, and having at least one additional phase comprising at least one carbide or mixed carbide of tantalum. For improving the high-temperature properties while simultaneously maintaining a good trade-off between hardness and bending strength, it is proposed that the sintered cemented carbide contains approximately 0.3 to 4% Ta, as related to the total mass of the sintered cemented carbide, that the WC has a grain size of between 0.1 and 1.3 ?m, that the binder phase contains the metals W, Cr and Ta, dissolved in solid solution, and that the at least one additional phase comprises a TaC phase visible by optical microscopy. The invention further relates to a powder-metallurgical process for manufacturing the sintered cemented carbide and to the use of the sintered cemented carbide for manufacturing cutting tools having improved high-temperature properties.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: February 20, 2007
    Assignee: Kennametal Inc.
    Inventors: Hans-Wilm Heinrich, Dieter Schmidt, Manfred Wolf
  • Patent number: 6878181
    Abstract: A cemented carbide with excellent properties for oil and gas applications regarding resistance to the combined erosion and corrosion synergistic effects at temperatures between ?50 and 300° C. and toughness. This object has been achieved with a cemented carbide containing, in weight %, 8-12 Co+Ni with a weight ratio Co/Ni of 0.25-4, 1-2 Cr and 0.1-0.3 Mo wherein essentially all of the WC grains have a size <1 ?m and with a magnetic cobalt content between 80 and 90% of that chemically determined.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: April 12, 2005
    Assignee: Sandvik AB
    Inventor: Michael John Carpenter
  • Patent number: 6875716
    Abstract: A carbonaceous refractory material is produced by adding an organic binder to a mixture containing a carbonaceous material comprising a carbonaceous raw material comprising calcined anthracite, calcined coke, artificial graphite or natural graphite or a mixture thereof at 50 to 85% as the principal raw material, alumina particle at 5 to 15%, metal silicon particle at 5 to 15%, and one or two or more of titanium carbide powder, titanium nitride powder and titanium carbonitride powder at 5 to 20% in total, kneading and molding the resulting mixture and baking the molded article under non-oxidizing atmosphere. By using the carbonaceous refractory material as the inner lining material for the side wall and bottom of blast furnace hearth, the consumption of the inner lining material due to the dissolution thereof in melted pig iron can be decreased, and simultaneously, the abrasion due to the flow of melted pig iron can be decreased, which works to prolong the life of the blast furnace.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: April 5, 2005
    Assignees: Nippon Steel Corporation, Nippon Electrode Company, Ltd.
    Inventors: Akio Ishii, Hitoshi Nakamura, Michio Nitta, Tsutomu Wakasa, Hirofumi Mikami, Yoshiyuki Yamagami
  • Patent number: 6872234
    Abstract: The cutting member comprises WC, two or more solid solutions of WC and compounds selected from carbides, nitrides and carbonitrides of metals of the groups 4a, 5a and 6a in the Periodic Table, and at least one metal of the iron group; and at least one of the two or more solid solutions being a solid solution having a high Nb or Zr content, whereby the wear resistance and plastic deformation resistance are improved in case of cutting hardly machinable materials such as stainless steel, thereby making it possible to prolong the service life of the cutting member.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: March 29, 2005
    Assignee: Kyocera Corporation
    Inventor: Daisuke Shibata
  • Patent number: 6844281
    Abstract: A preform for use in a metal matrix composite, particularly for a magnesium metal composite. In the preform the reinforcing material typically is silicon carbide, boron nitride, titanium nitride, carbon or graphite. The binder used in the preform is sintered magnesium fluoride, which avoids the known problems which result from the high reactivity of molten magnesium metal with other binders, such as silica and alumina, which results in the formation of magnesium oxide in the reinforced composite. The presence of magnesium oxide crystals in the metal matrix adversely affects the properties of the composite. The preform generally has a void volume of from about 50% to about 95%.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: January 18, 2005
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of Natural Resources
    Inventors: Jason S. H. Lo, Areekattuthazhayil K. Kuriakose, Raul Santos
  • Publication number: 20040241032
    Abstract: The present invention develops a manufacture method, via conventional liquid metallurgy, of finished and semi-finished metallic parts as casting, ingot, blooms and slabs in alloys base Fe, base Ni and base Co, microstructurally reinforced with complex molybdenum and titanium carbide particles, by means of their previous elaboration and latter addition to the molten alloy in the melting furnace. Then, when the alloy solidifies, they are inserted and distributed within the grains of the base metallic matrix, enhancing their mechanical properties and behavior at room as well as at high temperatures.
    Type: Application
    Filed: May 13, 2004
    Publication date: December 2, 2004
    Inventors: Ignacio Erauskin Lopetegui, Manuel Gutierrez Stampa, Inigo Agote Beloki, Manuel Orbegozo Ibarguren
  • Publication number: 20040231459
    Abstract: Cermets are provided in which a substantially stoichiometric metal carbide ceramic phase along with a reprecipitated metal carbide phase, represented by the formula MxCy, is dispersed in a metal binder phase. In MxCy M is Cr, Fe, Ni, Co, Si, Ti, Zr, Hf, V, Nb, Ta, Mo or mixtures thereof, x and y are whole or fractional numerical values with x ranging from 1 to 30 and y from 1 to 6. These cermets are particularly useful in protecting surfaces from erosion and corrosion at high temperatures.
    Type: Application
    Filed: April 22, 2004
    Publication date: November 25, 2004
    Inventors: ChangMin Chun, Narasimha-Rao Venkata Bangaru, Hyun-Woo Jin, Jayoung Koo, John Roger Peterson, Robert Lee Antram, Christopher John Fowler
  • Patent number: 6797369
    Abstract: There is provided a cemented carbide comprising a hard phase component which comprises a tungsten carbide (WC) and at least one selected from carbides, nitrides and carbonitrides of metals of the groups 4a, 5a and 6a in the periodic table; and a binder phase component comprising at least one of iron-group metals, wherein the surface region of the cemented carbide has 90-98% of the minimum hardness as compared with internal hardness, thereby having high hardness and toughness which is suitable to using as a cutting tool.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: September 28, 2004
    Assignee: Kyocera Corporation
    Inventors: Keiji Usami, Daisuke Shibata, Hiroshi Ohata
  • Publication number: 20040134309
    Abstract: Hardmetal compositions each including hard particles having a first material and a binder matrix having a second, different material comprising rhenium or a Ni-based superalloy. A two-step sintering process may be used to fabricate such hardmetals at relatively low sintering temperatures in the solid-state phase to produce substantially fully-densified hardmetals.
    Type: Application
    Filed: June 2, 2003
    Publication date: July 15, 2004
    Inventor: Shaiw-Rong Scott Liu
  • Patent number: 6761750
    Abstract: A cutting tool insert has a cemented carbide substrate and a coating. The cemented carbide substrate includes 73-93 wt % WC, 4-12 wt % binder phase, and cubic carbide phase with a binder phase enriched surface zone essentially free of cubic carbide phase. The cubic carbide phase includes elements from the groups IVB and VB, with the Ta content on a level corresponding to a technical impurity. Inserts according to the invention exhibit favorable edge strength and thermal shock resistance.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: July 13, 2004
    Assignee: SECO Tools AB
    Inventors: Jenni Zackrisson, Jan Qvick
  • Publication number: 20040035246
    Abstract: A compact is obtained from a mixed powder of a multi-component system ceramics composed of constitutive elements of at least two metal elements selected from the group consisting of Ti, Al, V, Nb, Zr, Hf, Mo, Ta, Cr, and W, N, and optionally C; and Fe, Ni, Co, or an alloy composed of a constitutive element of at least one metal element of Fe, Ni, and Co. A composite material is prepared by sintering the compact.
    Type: Application
    Filed: June 18, 2003
    Publication date: February 26, 2004
    Inventors: Mitsuo Kuwabara, Masanori Ohtsuka
  • Publication number: 20030177863
    Abstract: A sintered alloy for valve seats is comprised of carbon at 1 to 2 percent by weight, chromium at 3.5 to 4.7 percent by weight, molybdenum at 4.5 to 6.5 percent by weight, tungsten at 5.2 to 7.0 percent by weight, vanadium at 1.5 to 3.2 percent by weight, and the remainder of iron and unavoidable impurities. Enstatite particles at 1 to 3 percent by weight, hard alloy particles (A) with a Vickers hardness of 500 to 900 at 15 to 25 percent by weight, and hard alloy particles (B) with a Vickers hardness of 1000 or more at 5 to 15 percent by weight (A+B=35 percent by weight or less) are dispersed in the matrix of the sintered alloy skeleton distributed with carbide. Copper or copper alloy at 15 to 20 percent by weight is infiltrated into pores of the skeleton.
    Type: Application
    Filed: February 24, 2003
    Publication date: September 25, 2003
    Applicant: TEIKOKU PISTON RING CO., LTD.
    Inventor: Yoshio Koyama
  • Publication number: 20030115984
    Abstract: A cutting tool insert has a cemented carbide substrate and a coating. The cemented carbide substrate includes 73-93 wt % WC, 4-12 wt % binder phase, and cubic carbide phase with a binder phase enriched surface zone essentially free of cubic carbide phase. The cubic carbide phase includes elements from the groups IVB and VB, with the Ta content on a level corresponding to a technical impurity. Inserts according to the invention exhibit favorable edge strength and thermal shock resistance.
    Type: Application
    Filed: November 26, 2002
    Publication date: June 26, 2003
    Inventors: Jenni Zackrisson, Jan Qvick
  • Patent number: 6413293
    Abstract: The present invention relates to a method of making ultrafine WC—Co alloys from a well dispersed mixture of fine and non-agglomerated WC and Co powders, wherein the Co powders have a narrow grain size distribution wherein at least 80% of the grains have sizes in the interval x+0.2x with the interval of variation of 0.4x is not smaller than 0.1 um, and a carbon content of approximately the amount necessary to provide eta phase formation.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: July 2, 2002
    Assignee: Sandvik AB
    Inventors: Alistair Grearson, John Aucote, Michael John Carpenter
  • Patent number: 6387552
    Abstract: A TiCN-based cermet comprises 5-25 weight % of a binder phase mainly composed of Co and/or Ni, the balance being substantially a hard phase and inevitable impurities, the hard phase being mainly composed of carbide, nitride and/or carbonitride and containing at least Ti and W, the cermet having a cross-section microstructure in which the number of Ti-rich particles having an area of 0.02 &mgr;m2 or more is 1000 or less per a unit area of 1000 &mgr;m2.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: May 14, 2002
    Assignee: Hitachi Tool Engineering, Ltd.
    Inventors: Yusuke Iyori, Yuichi Nakahara, Yoshio Kimura
  • Publication number: 20020051885
    Abstract: There is proposed a tool with a tool body and a wear resistant layer system, which layer system comprises at least one layer of MeX. Me comprises titanium and aluminum and X is nitrogen or S carbon. The tool has a tool body of high speed steel (HSS) or of cemented carbide, but it is not a solid carbide end mill and not a solid carbide ball nose mill. in the MeX layer the quotient QI as defined by the ratio of the diffraction intensity I(200) to 1(111) assigned respectively to the (200) and (111) plains in the X ray cdffraction of the material using &thgr;-2&thgr; method is selected to be ≧1. Further, the I(200) is at least twenty times larger than the intensity average noise value, both measured with a well-defined equipment and setting thereof.
    Type: Application
    Filed: September 28, 2001
    Publication date: May 2, 2002
    Applicant: Balzers Aktiengelsellschaft
    Inventors: Hans Braendle, Nobuhiko Shima
  • Patent number: 6375707
    Abstract: There is disclosed a cemented carbide containing tungsten carbide, titanium carbide, nickel, molybdenum and chromium. The composition of the materials provides a good resistance to corrosion as well as high hardness and wear resistance. These properties are particularly interesting for the manufacture of pen balls. Ball-point pen balls made with these materials will have steady writing characteristics over a long period of time. This material is particularly suitable when water-based inks are used, because these inks are far more common than oil-based inks.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: April 23, 2002
    Assignee: Sandvik A.B.
    Inventors: Sylvie O'Donnell, Jerome Cheynet, Björn Uhrenius
  • Publication number: 20020005085
    Abstract: A consolidated complex shaped article having a density of at least about 95 percent of theoretical density is prepared by placing a plurality of separate bodies in an arrangement, such that each separate body is in contact with at least one other separate body to form an aggregate body and wherein at least one of the separate bodies is essentially dense. The material of each separate body is comprised of a ceramic, a cermet or a metal. The aggregate body is then consolidated at a consolidating temperature, superatmospheric pressure and time at temperature and time at superatmospheric pressure sufficient to form a consolidated shaped article. In consolidating the aggregate body, the consolidating temperature is a temperature that fails to form a liquid within at least one separate body and the superatmospheric temperature is applied for at least a portion of the time at the consolidating temperature.
    Type: Application
    Filed: August 29, 2001
    Publication date: January 17, 2002
    Inventors: James M. Macki, Eric A. Ness, Robert T. Nilsson, Ellen M. Dubensky, Walter J. Rozmus, Clifford A. Kelto, Edward E. Timm
  • 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: 6214079
    Abstract: A method for fabricating a triphasic composite such as a WC/Co/diamond composite with a high volume fraction of diamond in a WC/Co matrix. The method involves sintering of a WC/Co powder compact to develop a porous preform, which displays some rigidity and strength, infiltrating the porous preform with a controlled distribution of carbon, and high pressure/high temperature treatment of the carbon-containing WC/Co preform to transform the carbon to diamond. The distribution of diamond in the composite can be functionally graded to provide a WC/Co core and a diamond-enriched surface, wherein all three phases form an interconnected structure in three dimensions. Such a tricontinuous structure combines high strength and toughness with superior wear resistance, making it attractive for applications in machine tools and drill bits.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: April 10, 2001
    Assignee: Rutgers, The State University
    Inventors: Bernard H. Kear, Rajendra K. Sadangi, Larry E. McCandlish, Oleg Voronov
  • Patent number: 6124040
    Abstract: The invention concerns composites substantially consisting of: a cermet material having a binder metal phase of between 5 and 30 mass % and the remainder comprising at least one carbon nitride phase; or a hard metal with a hard material phase of between 70 and 100 %, the remainder being a binder metal phase, with the exception of a WC-Co hard metal, with up to 25 mass % cobalt as binder metal; or a powder-metallurgically produced steel. The invention further concerns a process for producing this composite. In order to improve bending strength and hardness, sintering is carried out in a microwave field.
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: September 26, 2000
    Assignee: Widia GmbH
    Inventors: Hans Kolaska, Monika Willert-Porada, Klaus Rodiger, Thorsten Gerdes
  • 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: 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: 5808214
    Abstract: Since a powder-produced material comprises cerium fluoride, it can exhibit good wear-resistance. The cerium fluoride content may be set in the range of from 0.1 to 22% by weight, in particular, in the range of from 0.1 to 10.0% by weight, based on the total weight of the powder-produced material. The powder-produced material may comprise a ferrous matrix including hard particles, and the ferrous matrix includes cerium fluoride.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: September 15, 1998
    Assignees: Toyota Jidosha Kabushiki Kaisha, Japan Powder Metallurgy Co., Ltd.
    Inventors: Tadataka Kaneko, Setsuto Daiza, Takehiko Esumi
  • 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: 5754935
    Abstract: The present invention provides a vane material having an excellent scuffing resistance in a compressor employing an alternative Freon gas as a cooling medium and a process for the preparation thereof. In accordance with the present invention, a vane material is provided having a structure comprising a base material consisting essentially of 1.0 to 4.5% by weight of carbon, not more than 1.5% by weight of silicon, not more than 1.0% by weight of manganese, 3 to 6% by weight of chromium, not more than 30% of tungsten and/or not more than 20% by weight of molybdenum provided that (W+2Mo) is not more than 45% by weight, 2 to 10% by weight of vanadium and/or niobium, not more than 20% by weight of cobalt, and a balance of iron and inavoidable impurities with additive particles of a carbide and additive particles of a nitride and/or a carbonitride, sintered thereto in an amount of more than 0% to not more than 25% by weight and 2 to 25% by weight based on the total weight of the vane material, respectively.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: May 19, 1998
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yutaka Kubo, Hideki Nakamura, Norimasa Uchida, Keiji Yamasaki