Free Metal Is Iron(fe), Cobalt(co), Or Nickel(ni) Only Patents (Class 75/242)
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Patent number: 12121972Abstract: A cemented carbide comprising a plurality of tungsten carbide particles and a binder phase, wherein in a first region of a first graph showing results obtained by carrying out line analysis along a first direction going from position X1 provided in the tungsten carbide particles to position X2 provided in the binder phase adjacent to the tungsten carbide particles, a distance PW at a maximum intensity IW of tungsten, a maximum distance PW70 showing an intensity IW70 of 70% of the maximum intensity IW, a distance PV at a maximum intensity IV of vanadium, a distance PCr at a maximum intensity ICr of chromium, a minimum distance PCo70 showing an intensity ICo70 of 70% of a maximum intensity ICo of cobalt, and a distance PCo at the maximum intensity ICo show a relationship PW<PW70<PV<PCr<PCo70<PCo.Type: GrantFiled: June 21, 2023Date of Patent: October 22, 2024Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yasuki Kido, Yoshihiro Kimura, Anongsack Paseuth
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Patent number: 11655525Abstract: Provided is a corrosion, erosion and wear resistant cemented carbide for high demand applications including, for example, use as a component within oil and gas production. The cemented carbide includes a hard phase and a binder phase. The cemented carbide may include, for example. Ni, Cr and Mo. The binder phase content of the cemented carbide is between 7 to 11 wt %. The WC of the cemented carbide may have an average grain size of from 0.1 to 2 ?m.Type: GrantFiled: November 28, 2019Date of Patent: May 23, 2023Assignee: HYPERION MATERIALS & TECHNOLOGIES (SWEDEN) ABInventors: Olivier Ther, Olivier Lavigne
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Patent number: 10597758Abstract: A cemented carbide comprises particles including a tungsten carbide (WC) as a main component; a binder phase including cobalt (Co) as a main component; and particles including a carbide or a carbonitride of at least one selected from the group consisting of Group 4a, 5a, and 6a elements, or a solid solution thereof, wherein a cubic phase free layer (CFL), in which the carbide or the carbonitride is not formed, is formed from a surface of the cemented carbide to a depth of 5 ?m to 50 ?m.Type: GrantFiled: November 10, 2015Date of Patent: March 24, 2020Assignee: KORLOY INC.Inventors: Jung-wook Kim, Sung-Gu Lee, Yong-hyun Kim, Sun-yong Ahn
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Patent number: 9764523Abstract: An anvil including a hard phase and a metal matrix in which the hard phase is dispersed, a concentration of the metal matrix phase varying according to a concentration gradient, is disclosed. The anvil may be used in a high pressure press. Methods of making an anvil including forming a hard phase dispersed in a metal matrix phase, a concentration of the metal matrix phase varying according to a concentration gradient, are also disclosed.Type: GrantFiled: November 26, 2012Date of Patent: September 19, 2017Assignee: SMITH INTERNATIONAL, INC.Inventors: J. Daniel Belnap, Lan Carter
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Patent number: 8992657Abstract: 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: GrantFiled: February 23, 2012Date of Patent: March 31, 2015Assignees: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.Inventors: Yoshimitsu Sawazono, Katsuya Uchino, Yoshihiro Minato
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Patent number: 8956438Abstract: A cutting element for engaging earthern formations having a wear surface formed from a low coefficient of thermal expansion (CTE) composition including a polycrystalline diamond or polycrystalline cubic boron nitride hard phase material and a ductile phase low CTE material formed from an alloy made of Co, Ni, Fe, C, and Mn. The hard phase material is bonded to one another by the ductile phase material to form the low CTE composition.Type: GrantFiled: December 4, 2012Date of Patent: February 17, 2015Assignee: Smith International, Inc.Inventors: Zhigang Fang, Anthony Griffo, Gregory T. Lockwood, Dah-Ben Liang
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Patent number: 8834594Abstract: 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: GrantFiled: December 21, 2011Date of Patent: September 16, 2014Assignee: Kennametal Inc.Inventors: Guenter Johann Roder, Anders Evert Petersson, Charles Graham McNerny, Pankaj Kumar Mehrotra
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Patent number: 8679220Abstract: This invention relates to a ceramic and a cermet each having a second phase for improving toughness via phase separation from a complete solid-solution phase and to a method of preparing them. The ceramic and the cermet may have the second phase phase-separated from the complete solid-solution phase, thereby easily achieving a great improvement in toughness and exhibiting other good properties including high strength, consequently enabling the manufacture of high-strength and high-toughness cutting tools, instead of conventional WC—Co hard materials.Type: GrantFiled: June 20, 2007Date of Patent: March 25, 2014Assignee: SNU R&DB FoundationInventor: Shin Hoo Kang
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Patent number: 8535407Abstract: The invention relates to a hard-metal comprising at least 13 volume % of a metal carbide selected from the group consisting of TiC, VC, ZrC, NbC, MoC, HfC, TaCl WC or a combination thereof, a binder phase comprising one or more of iron-group metals or alloy thereof and 0.1 to 10 weight % Si and 0.1 to 10 weight % Cr and having a liquidus temperature at 1280 degrees C. or lower and 3 to 39 volume % of diamond or cBN grains coated with a protective coating or a mixture thereof and a process for making the hard-metal.Type: GrantFiled: September 15, 2009Date of Patent: September 17, 2013Assignee: Element Six GmbHInventors: Igor Yuri Konyashin, Bernd Heinrich Ries, Frank Friedrich Lachmann
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Patent number: 8394169Abstract: A sintered cemented carbide body (e.g., a cutting tool) and a method of making the same. The sintered cemented carbide body includes tungsten carbide, a binder phase of at least one metal of the iron group or an alloy thereof, and one or more solid solution phases. Each one of the solid solution phases has at least one of the carbides and carbonitrides of a combination of zirconium, niobium, and tungsten. The method includes the steps of providing a powder mixture that contains tungsten carbide, a binder metal powder comprising at least one metal of the iron group or an alloy thereof, and at least one of the carbides and carbonitrides of both zirconium and niobium including a powder of the carbides or carbonitrides of zirconium and niobium, forming a green compact of said powder mixture, and vacuum sintering or sinter-HIP said green compact at a temperature of from 1400 to 1560° C.Type: GrantFiled: March 31, 2006Date of Patent: March 12, 2013Assignee: Kennametal Inc.Inventors: Hans-Wilm Heinrich, Manfred Wolf, Dieter Schmidt
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Patent number: 8303681Abstract: A mixed powder and a sintered body obtained by sintering the mixed powder. The mixed powder includes a solid-solution powder with complete solid-solution phase. The solid-solution powder includes a carbide or a carbonitride of at least two metals selected, including Ti, from metals of Groups IVa, Va and VIa of the periodic table, or a mixture thereof. A mixed cermet powder and a cermet obtained by sintering the mixed cermet powder are also disclosed. The mixed cermet powder includes at least a cermet powder with complete solid-solution phase. The cermet powder includes a carbide or a carbonitride of at least two metals selected, including Ti, from metals of Groups IVa, Va and VIa of the periodic table, or a mixture thereof, and at least one metal selected from the group consisting of Ni, Co and Fe. Also disclosed are a sintered body and a fabrication method of a cermet.Type: GrantFiled: August 8, 2007Date of Patent: November 6, 2012Assignee: Seoul National University Industry FoundationInventors: Shin-Hoo Kang, Jin-Kwan Jung, Han-Jung Kwon
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Patent number: 8202344Abstract: A hard alloy material comprising tungsten carbide in an amount of less than 50 weight percent of the material, titanium carbide in an amount of at least about 30 weight percent, and a binder material of cobalt and nickel. In other aspects of the invention, molybdenum and/or chromium are included to further lower the thermal conductivity of the material. The thermal conductivity of the material of the invention is about 12 Watt/m° K. or less.Type: GrantFiled: May 21, 2007Date of Patent: June 19, 2012Assignee: Kennametal Inc.Inventor: Debangshu Banerjee
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Patent number: 7972409Abstract: Disclosed is a cemented carbide comprising 5 to 10 mass % of cobalt and/or nickel, and 0 to 10 mass % of at least one selected from a carbide (except for tungsten carbide), a nitride and a carbonitride of at least one selected from the group consisting of metals of groups 4, 5 and 6 of the Periodic Table, the balanced amount of tungsten carbide, a hard phase comprising mainly tungsten carbide particles, and containing ? particles of at least one selected from the carbide, the nitride and the carbonitride, and the hard phase being bonded through a binder phase comprising mainly cobalt and/or nickel, wherein a mean particle size of the tungsten carbide particles is 1 ?m or less, and the cemented carbide having a sea-island structure in which plural binder-phase-aggregated portions composed mainly of cobalt and/or nickel are scattered in the proportion of 10 to 70 area % based on the total area on the surface of the cemented carbide. The cemented carbide is excellent in wear resistance and fracture resistance.Type: GrantFiled: March 23, 2006Date of Patent: July 5, 2011Assignee: Kyocera CorporationInventors: Asako Fujino, Takashi Tokunaga
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Patent number: 7879129Abstract: A wear part is formed of a diamond-containing composite material with 40 to 90% by volume of diamond grains, 0.001 to 12% by volume of carbidic phase, formed from one or more elements from the group Si, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, B, Sc, Y and lanthanides and 7 to 49% by volume of a metallic or intermetallic alloy with a liquidus temperature<1400° C., the metallic or intermetallic alloy containing the carbide-forming element or elements in dissolved or precipitated form and having a hardness at room temperature>250 HV.Type: GrantFiled: December 1, 2006Date of Patent: February 1, 2011Assignee: Ceratizit Austria Gesellschaft mbHInventors: Rolf Kösters, Arndt Lüdtke
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Patent number: 7799111Abstract: 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: GrantFiled: March 28, 2005Date of Patent: September 21, 2010Assignee: Sulzer Metco Venture LLCInventors: David S. Gollob, Thomas H. Piquette, James Derby, Omar Basil Al-Sabouni, Richard Karl Schmid, Jacobus Cornelis Doesburg
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Patent number: 7713468Abstract: Method of producing a sintered body comprising the steps of mixing one or more powders forming hard constituents with powders forming a binder phase comprising cobalt powder where the cobalt powder comprises cobalt having mainly a fcc-structure defined as the peak height ratio between the Co-fcc(200)/Co-hcp(101) being greater than or equal to about 3/2, as measured between the baseline and maximum peak height, measured by XRD with a 2?/? focusing geometry and Cu-K? radiation. The present invention also relates to a ready-to-press powder comprising cobalt having mainly a fcc-structure and where the cobalt powder has a grain size (FSSS) of from about 0.2 to about 2.9 ?m. The present invention also relates to sintered bodies made according to the method. The sintered bodied according to the present invention have reduced porosity and less crack formation.Type: GrantFiled: November 19, 2007Date of Patent: May 11, 2010Assignee: Sandvik Intellectual Property ABInventors: Jeanette Persson, Leif Dahl, Gerold Weinl, Ulf Rolander
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Patent number: 7700186Abstract: According to the present invention there is now provided a body cemented carbide provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC—Co cemented carbides.Type: GrantFiled: March 27, 2008Date of Patent: April 20, 2010Assignee: Sandvik Intellectual Property AktiebolagInventor: Marian Mikus
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Patent number: 7635448Abstract: 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: GrantFiled: September 10, 2004Date of Patent: December 22, 2009Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Mitsuo Kuwabara, Masanori Ohtsuka
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Patent number: 7578867Abstract: A ceramic sintered product which comprises a first hard phase containing a nitride of titanium, a second hard phase containing at least one of alumina and zirconia, and a binding phase containing nickel; and a method for producing the ceramic sintered product. The ceramic sintered product is lightweight and exhibits good abrasion resistance in a wet atmosphere, and further can be produced at a low cost.Type: GrantFiled: September 28, 2006Date of Patent: August 25, 2009Assignee: Kyocera CorporationInventors: Kenichi Hamamura, Saburou Nagano
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High-strength and highly-wear-resistant sintered diamond object and manufacturing method of the same
Patent number: 7553350Abstract: A high-strength and highly-wear-resistant sintered diamond object according to the present invention includes sintered diamond particle having an average particle size of not larger than 2 ?m and a binder phase as a remaining portion. The content of the sintered diamond particle in the sintered diamond object is not smaller than 80 volume % and not larger than 98 volume %. The binder phase contains at least one element selected from the group consisting of titanium and the like, of which content is not smaller than 0.5 mass % and less than 50 mass %, and contains cobalt, of which content is not smaller than 50 mass % and less than 99.5 mass %. A part of the element or the element as a whole is present as carbide particle having an average particle size of not larger than 0.8 ?m. A texture of the carbide particle is discontinuous, and adjacent diamond particles are bound to each other.Type: GrantFiled: July 26, 2005Date of Patent: June 30, 2009Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yoshihiro Kuroda, Satoru Kukino, Tomohiro Fukaya -
Patent number: 7510034Abstract: An earth-boring drill bit having a bit body with a cutting component formed from a tungsten carbide composite material is disclosed. The composite material includes a binder and tungsten carbide crystals comprising sintered pellets. The composite material may be used as a hardfacing on the body and/or cutting elements, or be used to form portions or all of the body and cutting elements. The pellets may be formed with a single mode or multi-modal size distribution of the crystals.Type: GrantFiled: October 11, 2006Date of Patent: March 31, 2009Assignee: Baker Hughes IncorporatedInventors: David A. Curry, James L. Overstreet, Jimmy W. Eason
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Publication number: 20080314200Abstract: The present invention relates to a fine grained WC-Co cemented carbide. By adding an extremely small amount of Ti, V, Zr, Ta or Nb alone or in combinations, a grain refined cemented carbide structure with less abnormal WC-grains has been obtained.Type: ApplicationFiled: May 30, 2008Publication date: December 25, 2008Applicant: SANDVIK INTELLECTUAL PROPERTY ABInventors: Susanne NORGREN, Alexandra KUSOFFSKY, Alistair GREARSON
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Patent number: 7407525Abstract: Fracture and wear resistant cutting elements are provided. Examples include a cutting element formed of a wear resistant material having a binder composition and a coarse grain size such that the portion of the cutting element formed of the wear resistant material has a fracture toughness of at least about 18 ksi(in)0.5 and a wear number of at least about 1.8. In a particular example, the wear resistant material has a fracture toughness of at least about 20 ksi(in)0.5. A down hole cutting tool incorporating such cutting elements is also provided.Type: GrantFiled: November 4, 2003Date of Patent: August 5, 2008Assignee: Smith International, Inc.Inventor: Dah-Ben Liang
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Patent number: 7384689Abstract: According to the present invention there is now provided a body cemented carbide provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC—Co cemented carbides.Type: GrantFiled: September 27, 2006Date of Patent: June 10, 2008Assignee: Sandvik Intellectual Property ABInventor: Marian Mikus
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Patent number: 7326273Abstract: 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: GrantFiled: June 27, 2002Date of Patent: February 5, 2008Assignee: Honda Giken Kogyo Kabushiki KaishaInventor: Mitsuo Kuwabara
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Patent number: 7179319Abstract: 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: GrantFiled: January 16, 2004Date of Patent: February 20, 2007Assignee: Kennametal Inc.Inventors: Hans-Wilm Heinrich, Dieter Schmidt, Manfred Wolf
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Patent number: 7070643Abstract: There is disclosed a compositionally graded sintered alloy which comprises: 1 to 40% by weight of a iron group metal; 0.1 to 10% by weight of at least one type of a specific metal element selected from the group consisting of Cr, Au, Ge, Cu; Sn, Al, Ga, Ag, In, Mn and Pb; a hard phase containing, as a main component, at least one compound selected from the group consisting of a carbide, a nitride and a mutual solid solution of a metal(s) which belongs to Group 4 (Ti, Zr, Hf), 5 (V, Nb, Ta) or 6 (Cr, Mo, W) of the Periodic Table; and inevitable impurities, wherein the content of the specific metal element gradually increases from a surface of the sintered alloy toward an inner portion thereof, and a ratio of the average concentration of the specific metal element in a region which is at least 1 mm inside from the surface of the sintered alloy, to the average concentration of the specific metal element in a region between the surface and the position which is 0.Type: GrantFiled: March 26, 2004Date of Patent: July 4, 2006Assignee: Toshiba Tungaloy Co., Ltd.Inventor: Masaki Kobayashi
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Patent number: 6872234Abstract: 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: GrantFiled: December 11, 2000Date of Patent: March 29, 2005Assignee: Kyocera CorporationInventor: Daisuke Shibata
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Patent number: 6869460Abstract: An eta-phase-free cemented carbide insert with improved surface hardness and wear resistance containing WC, and possibly cubic phases of a carbide and/or carbonitride, in a binder phase of Co, Ni, Fe or a combination thereof, with a binder phase gradient in the surface and near surface regions, is disclosed. The nominal binder phase content in the insert is 3-20 weight %. The surface, and near surface cobalt content is 50-100% of the binder phase content of the inner portion of the insert. The insert is formed by standard sintering practices, followed by the chemical removal of the binder phase from the surface and near surface regions of the insert. The insert is then heat treated at a temperature of 1300-1350° C. in a carburizing atmosphere, for a time of 5-400 minutes to cause diffusion of the binder phase from the interior into the binder depleted surface regions.Type: GrantFiled: September 22, 2003Date of Patent: March 22, 2005Assignee: Valenite, LLCInventors: Stephen L. Bennett, Mark J. Jagner
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Patent number: 6797369Abstract: 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: GrantFiled: September 26, 2002Date of Patent: September 28, 2004Assignee: Kyocera CorporationInventors: Keiji Usami, Daisuke Shibata, Hiroshi Ohata
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Patent number: 6767416Abstract: A corrosion resistant, high strength austenitic stainless steel consisting of 1.0% or less of Si, 2.0% or less of Mn, 0.5% or less of O, 7 to 30% of Ni, 14 to 26% of Cr, 0.3% or less of combination of C and N, at least one element selected from the group consisting of 1.0% or less of Ti, 2.0% or less of Zr and 2.0% or less of Nb, and the balance consisting of Fe and unavoidable impurities, the percentage being given in weight basis; said steel containing carbonitride with a grain size of several to 100 nm dispersed therein; said steel having an average crystal grain size of 1 &mgr;m or less; and said steel containing 90% by volume or more of austenite phase; is excellent in strength and corrosion resistance.Type: GrantFiled: February 27, 2002Date of Patent: July 27, 2004Assignee: Hitachi, Ltd.Inventors: Ryo Ishibashi, Yasuhisa Aono
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Patent number: 6761750Abstract: 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: GrantFiled: November 26, 2002Date of Patent: July 13, 2004Assignee: SECO Tools ABInventors: Jenni Zackrisson, Jan Qvick
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Publication number: 20040079191Abstract: There is disclosed a hard alloy which comprises 5 to 50% by volume of a metallic binder phase comprising at least one element selected from cobalt, nickel and iron as a main component, 0 to 40% by volume of a cubic crystal compound comprising at least one compound selected from a carbide, nitride and mutual solid solution of a metal of Group IVB, VB or VIB of the Periodic Table, and the reminder being hexagonal tungsten carbide and inevitable impurities,Type: ApplicationFiled: October 23, 2003Publication date: April 29, 2004Applicant: TOSHIBA TUNGALOY CO., LTD.Inventor: Masaki Kobayashi
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Patent number: 6682580Abstract: A matrix powder for the production of components for wear-resistant applications by forming the matrix powder, along with an infiltrant, into a matrix, and and a wear-resistant component produced therefrom are presented. In order to improve mechanical properties, in particular resistance to erosion, it is proposed for at least some of the hard material to be in the form of spheroidal hard-material particles with a particle size of less than 500 &mgr;m.Type: GrantFiled: April 16, 2002Date of Patent: January 27, 2004Assignee: WOKA Schweisstechnik GmbHInventors: Eberhard G. Findeisen, Vivek Ranjan Banerjee, Richard F. Moll, Siegmund Kremmer
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Patent number: 6655478Abstract: A fracture and wear resistant rock bit is disclosed, which includes a bit body, and at least one roller cone disposed on the bit body adapted such that at least one row of cutting elements disposed on the at least one roller cone defines a gage row. At least one cutting element disposed on the gage row has a fracture toughness of at least 20 ksi (in)0.5 and a wear number of at least 1.5.Type: GrantFiled: December 14, 2001Date of Patent: December 2, 2003Assignee: Smith International, Inc.Inventors: Dah-Ben Liang, Gary Portwood, Paul E. Cox, John L. Williams
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Publication number: 20030155041Abstract: A method for densification of the surface layer of an optionally sintered powder metal component comprising the steps of: decarburizing the surface layer for softening the surface layer of the component; and densifying the surface layer of the component.Type: ApplicationFiled: January 28, 2003Publication date: August 21, 2003Inventors: Sven Bengtsson, Yang Yu, Martin Svensson
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Patent number: 6602312Abstract: A cemented carbide seal ring has at least one hard phase in a binder phase based on Co, Ni and Fe which results in a content Fe, Ni and Cr of less than 50 &mgr;g/l of each in a leach test with deionized water at 85° C. performed according to the requirements of British Standard BS6920: Section 2.6: 1996.Type: GrantFiled: February 8, 2002Date of Patent: August 5, 2003Assignee: Sandvik ABInventors: Stefan Ederyd, Emmanuel Pauty
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Patent number: 6576036Abstract: A superfine material made by incorporation of an inorganic polymer precursor of a grain growth inhibitor into intermediates useful for the production of superfine materials. The precursor/nanostructured material composite is optionally heat treated at a temperature below the grain growth temperature of the superfine material in order to more effectively disperse the precursor. The composites are then heat treated at a temperature effective to decompose the precursor and to form superfine materials having grain growth inhibitors uniformly distributed at the grain boundaries. Synthesis of the inorganic polymer solution comprises forming an inorganic polymer from a solution of metal salts, filtering the polymer, and drying. Alloying additives as well as grain growth inhibitors may be incorporated into the superfine materials.Type: GrantFiled: May 1, 2001Date of Patent: June 10, 2003Assignee: Inframat CorporationInventors: Danny T. Xiao, Chris W. Strock, Donald M. Wang, Peter R. Strutt
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Publication number: 20020059850Abstract: A cemented carbide insert of a first grade has at least one cutting point consisting of a cemented carbide of a second grade with different composition and/or grain size with an uneven transition zone between the first and second grade.Type: ApplicationFiled: November 9, 2001Publication date: May 23, 2002Inventors: Lars-Ake Engstrom, Helene Ouchterlony
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Patent number: 6387552Abstract: 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: GrantFiled: September 21, 2000Date of Patent: May 14, 2002Assignee: Hitachi Tool Engineering, Ltd.Inventors: Yusuke Iyori, Yuichi Nakahara, Yoshio Kimura
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Publication number: 20020048526Abstract: An sintered iron-based powder metal body with outstandingly lower re-compacting load and having a high density and a method of manufacturing an iron-based sintered component with fewer pores of a sharp shape and having high strength and high density, the method comprising mixing,Type: ApplicationFiled: August 21, 2001Publication date: April 25, 2002Applicant: Kawasaki Steel CorporationInventors: Naomichi Nakamura, Satoshi Uenosono, Shigeru Unami, Masashi Fujinaga, Takashi Yoshimura, Mitsumasa Iijima, Shin Koizumi, Hiroyuki Anma, Yasuo Hatai
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Patent number: 6372012Abstract: A superhard filler hardmetal having a superhard material filler, binder metal or matrix and in some instances at least a first hard component is disclosed. The superhard filler hardmetal has a porosity rating of substantially A06, B00, C00 or better and may be essentially pore free, i.e., A00, B00, C00. The superhard filler hardmetal is formed by mechanically mixing a superhard material, in some instances at least a first hard component and a binder metal or matrix precursor, shaping the mixture into a green body and consolidating the green body at a preselected temperature, superatmospheric pressure and time at temperature and time at superatmospheric pressure sufficient to form the superhard filler hardmetal. The consolidation preferably occurs without the formation of a liquid in the body and at least a portion of the time at superatmospheric pressure is at the preselected temperature. Diamond filler and boron nitride filler are examples of superhard materials usable as filler.Type: GrantFiled: July 13, 2000Date of Patent: April 16, 2002Assignee: Kennametal Inc.Inventors: Shivanand Majagi, Jimmy W. Eason, Robert W. Britzke
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Publication number: 20020026854Abstract: A ball for a ball-point pen is provided comprising cemented carbide of WC—Cr3C2—Co where VC is contained as a solid solution in the Cr3C2—CO phase which is a binder of WC particles and wherein the mean diameter of the WC particles is in the range of from about 0.3 to about 0.5 &mgr;m. In one embodiment of the invention, a portion of the Cr3C2—VC—CO phase exposed on the surface of the ball comprises a plurality of concave recesses.Type: ApplicationFiled: April 11, 2001Publication date: March 7, 2002Inventors: Kazuyuki Nishikita, Hideji Yoshida
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Patent number: 6338907Abstract: The invention relates to an abrasive tool comprising a support body and at least one abrasive element connected thereto. Said abrasive element has an abrasive grain which is joined by a sintered metal. The sintered metal used for joining is copper-coated iron and is alloyed with metal borides, metal carbides and/or metal silicides and also with tin.Type: GrantFiled: April 3, 2000Date of Patent: January 15, 2002Assignee: Tyrolit Schleifmittelwerke Swarovski K.G.Inventor: Wolfgang Strelsky
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Patent number: 6299658Abstract: 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: GrantFiled: July 23, 1998Date of Patent: October 9, 2001Assignee: Sumitomo Electric Industries, Ltd.Inventors: Hideki Moriguchi, Akihiko Ikegaya
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Patent number: 6299992Abstract: The present invention relates to method of making a cemented carbide insert, comprising a cemented carbide substrate and a coating. The substrate contains WC and cubic carbonitride phase in a binder phase based of Co and/or Ni and has a binder phase enriched surface zone essentially free of cubic phase. The binder phase enriched surface zone prevails over the edge. By sintering in an atmosphere essentially consisting of nitrogen the thickness of the binder phase enriched zone can be controlled.Type: GrantFiled: August 25, 1999Date of Patent: October 9, 2001Assignee: Sandvik ABInventors: Per Lindskog, Per Gustafson
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Patent number: 6277774Abstract: A method comprising incorporation of an inorganic polymer precursor of a grain growth inhibitor into superfine materials or intermediates useful for the production of superfine materials. The precursor/nanostructured material composite is optionally heat treated at a temperature below the grain growth temperature of the superfine material in order to more effectively disperse the precursor. The composites are then heat treated at a temperature effective to decompose the precursor and to form superfine materials having grain growth inhibitors uniformly distributed at the grain boundaries. Synthesis of the inorganic polymer solution comprises forming an inorganic polymer from a solution of metal salts, filtering the polymer, and drying. Alloying additives as well as grain growth inhibitors may be incorporated into the superfine materials.Type: GrantFiled: August 21, 1998Date of Patent: August 21, 2001Assignee: Inframat CorporationInventors: Danny T. Xiao, Chris W. Strock, Donald M. Wang, Peter R. Strutt
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Patent number: 6261329Abstract: 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: GrantFiled: August 10, 1999Date of Patent: July 17, 2001Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yasunobu Ogata, Satoru Kukino, Yasuyuki Kanada, Junichi Shiraishi, Tetsuo Nakai
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Patent number: 6241799Abstract: The present invention discloses a sintered cemented carbide alloy with excellent corrosion and oxidation resistance. The alloy comprises 70-98 weight-% hard material essentially comprising WC in a monophase binder phase. It has been found that by the use of submicron WC the corrosion and oxidation resistance can be improved compared to known corrosion and oxidation resistant cemented carbide alloys.Type: GrantFiled: February 18, 2000Date of Patent: June 5, 2001Assignee: Sandvik ABInventor: Enrico Galli
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Patent number: 6235129Abstract: A hard magnetic material contains Co as a main component, at least one element Q of P, C, Si and B, and Sm, and an amorphous phase and a fine crystalline phase. The texture of the hard magnetic material contains 50% by volume or more of fine crystalline phase having an average crystal grain size of 100 nm or less, and has a mixed phase state containing a soft magnetic phase and a hard magnetic phase. Further, anisotropy is imparted to the crystal axis of the hard magnetic phase.Type: GrantFiled: December 1, 1998Date of Patent: May 22, 2001Assignee: ALPS Electric Co., Ltd.Inventors: Akinori Kojima, Akihiro Makino, Takashi Hatanai, Yutaka Yamamoto, Akihisa Inoue