Carbide Containing Patents (Class 419/14)
  • Patent number: 10247864
    Abstract: In the present invention, a multi-film structure being coated on the surface of a workpiece is disclosed. The multi-film structure is formed by making a high-entropy material film of at least two layers and a non-high-entropy material film of at least one layer be stacked on each other. In addition, the multi-film structure can also be formed by making a first high-entropy material film of at least one layer and a second non-high-entropy material film of at least one layer be stacked on each other. This multi-film structure particularly contains interlaminar interfaces to inhibit crack extension and reduce plastic deformation, so that the hardness and toughness of the workpiece coated with this inventive multi-film structure would be obviously enhanced. Moreover, the appearance color of the workpiece can also be changed by the multi-film structure, wherein the color type is dependent on the optical interferences occurring in the multi-film structure.
    Type: Grant
    Filed: April 8, 2017
    Date of Patent: April 2, 2019
    Assignee: National Tsing Hua University
    Inventor: Jien-Wei Yeh
  • Patent number: 9879333
    Abstract: A process for producing a component includes providing a composition comprising hard material particles and a binder metal, and sintering the composition at a sintering temperature of from 1250° C. to 1400° C. for a period of from 3 to 15 minutes. The hard material particles comprise an inner core comprising fused tungsten carbide and an outer shell comprising tungsten carbide. The binder metal is selected from the group consisting of Co, Ni, Fe and alloys comprising at least one metal selected from Co, Ni and Fe.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: January 30, 2018
    Assignee: H. C. STARCK GMBH
    Inventors: Christian Gerk, Markus Zumdick
  • Patent number: 9687963
    Abstract: Methods of forming at least a portion of an earth-boring tool include providing particulate matter including a hard material in a mold cavity, melting a metal and the hard material to form a molten composition comprising a eutectic or near-eutectic composition of the metal and the hard material, casting the molten composition to form the at least a portion of an earth-boring tool within the mold cavity, and providing an inoculant within the mold cavity. Methods of forming a roller cone of an earth-boring rotary drill bit include forming a molten composition, casting the molten composition within a mold cavity, solidifying the molten composition to form the roller cone, and controlling grain growth using an inoculant as the molten composition solidifies. Articles including components of earth-boring tools are fabricated using such methods.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: June 27, 2017
    Assignee: Baker Hughes Incorporated
    Inventor: John H. Stevens
  • Patent number: 9604885
    Abstract: A super-hard material is a late transition metal doped B4C ceramic. The lightweight ceramics can display Vickers Hardness in excess of 45 GPa. Transition metals, such as Ni, Co, Rh, and Pd can be doped into the boron carbide at levels up to about 2.5%. A spark plasma sintering (SPS) of an evacuated powder of B4C and the transition metal at temperatures up to 2000° C., and pressures of up to about 100 GPa forms a super-hard material as a body. The late transition metal doped B4C ceramic can be used for armor, grinding materials, thermoelectric materials, and catalysts.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: March 28, 2017
    Assignees: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC., UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Ghatu Subhash, Richard Blair
  • Patent number: 9259784
    Abstract: A method for manufacturing a titanium acetabular cup shell includes obtaining a titanium powder. A three part mold having a first part with a part-spherical inner surface, a second ram part with a part-spherical outer impact surface and a third ram part with an annular impact surface are provided to compact the titanium powder. The second and third parts are aligned along an axis within the first part. The second part is aligned along a center axis within the annular impact surface of the third part. The first mold part is filled with the titanium powder. The second mold part-spherical outer surface and the third part annular surface are moved towards the part-spherical inner surface of the first part into contact with the powder. The powder is compacted with the second part part-spherical outer impact surface and the third part annular impact surface to about 50% of its initial volume.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: February 16, 2016
    Assignee: Howmedica Osteonics Corp.
    Inventors: John Lapszynski, Lionel Fuentes, Jr.
  • Publication number: 20150098855
    Abstract: The present invention relates to a method of surface hardening a plurality of sintered bodies having a hard phase and a binder phase. The method includes the steps of placing the bodies in a container, and forming a system including the container and the bodies therein, and causing the bodies to move and collide with each other and with inside walls of the container. The container is vibrating utilizing a mechanical resonance frequency of the system.
    Type: Application
    Filed: March 7, 2013
    Publication date: April 9, 2015
    Inventors: Michael Carpenter, Sarah Geoghegan, Eugene Keown, Jane Smith
  • Publication number: 20150053037
    Abstract: The present invention provides a sintered body and a production method therefor in which effects of pores remaining at a surface of the sintered body can be avoided without removing the pores by machining and plastic working, thereby obtaining strength equivalent to that of ingot materials. The sintered member comprises: a hardness distribution in which hardness contiguously varies from a surface to an inner portion; a Vickers hardness value of 730 or less at the surface; the maximum hardness of which portion exists in a region of 150 to 300 ?m from the surface; wherein the maximum hardness is a Vickers hardness value of 600 or more.
    Type: Application
    Filed: March 11, 2013
    Publication date: February 26, 2015
    Inventors: Go Hagimoto, Tomoyuki Kohida, Katsuhiko Ueda, Kenzo Morita, Shuichi Aoki
  • Patent number: 8945466
    Abstract: There is provided a composite material for a heat dissipating plate which achieves both a high thermal conductivity and a low coefficient of thermal expansion and has a performance satisfactory as a heat dissipating plate and a method of production of a composite material which can produce the composite material at a low cost. For this reason, powder metallurgy is used to produce the composite material for a heat dissipating plate. The composite material for a heat dissipating plate which is fabricated by this method of production contains an aluminum alloy and silicon carbide. The particles of silicon carbide are in contact with each other.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: February 3, 2015
    Assignee: Nippon Light Metal Company, Ltd.
    Inventors: Kaoru Ishido, Hideki Ishii, Shigehisa Watanabe, Hisashi Hori
  • Patent number: 8936751
    Abstract: A multiphase composite system is made by binding hard particles, such as TiC particles, of various sizes with a mixture of titanium powder and aluminum, nickel, and titanium in a master alloy or as elemental materials to produce a composite system that has advantageous energy absorbing characteristics. The multiple phases of this composite system include an aggregate phase of hard particles bound with a matrix phase. The matrix phase has at least two phases with varying amounts of aluminum, nickel, and titanium. The matrix phase forms a bond with the hard particles and has varying degrees of hard and ductile phases. The composite system may be used alone or bonded to other materials such as bodies of titanium or ceramic in the manufacture of ballistic armor tiles.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: January 20, 2015
    Inventor: Robert G. Lee
  • Publication number: 20150010423
    Abstract: The present disclosure relates to a method of making a sintered cutting body having a side with binder metal capping and another side without binder metal capping. The disclosure also relates to a sintered cutting body produced according to the method.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: Sven ENGLUND, Jose GARCIA
  • Patent number: 8927111
    Abstract: There are provided a surface coating material for a molten zinc bath member with improved zinc corrosion resistance, a production method thereof, and a molten zinc bath member. The surface coating material comprises WC powder particles and a binder metal. The binder metal comprises Co and a metal element electrochemically nobler than Co and constitutes an alloy structure having a single phase.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: January 6, 2015
    Assignee: Sanyo Special Steel Co., Ltd.
    Inventors: Hiroki Ikeda, Katsu Yanagimoto
  • Publication number: 20150004043
    Abstract: An alloy and method of forming the alloy are provided. The alloy includes a matrix phase, and a population of particulate phases dispersed within the matrix. The matrix includes iron and chromium; and the population includes a first subpopulation of particulate phases and a second subpopulation of particulate phases. The first subpopulation of particulate phases include a complex oxide, having a median size less than about 20 nm, and present in the alloy in a concentration from about 0.1 volume percent to about 5 volume percent. The second subpopulation of particulate phases have a median size in a range from about 30 nm to about 10 microns, and present in the alloy in a concentration from about 1 volume percent to about 15 volume percent.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 1, 2015
    Inventors: Richard DiDomizio, Matthew Joseph Alinger, Laura Cerully Dial
  • Publication number: 20140341772
    Abstract: In one aspect, methods of milling carbide are described herein. A method of milling carbide comprises placing a particulate composition comprising carbide in a vessel containing milling media and placing an additive in the vessel, the additive undergoing evaporation or sublimation to provide a non-oxidative atmosphere in the vessel. The carbide particles are comminuted with the milling media in the non-oxidative atmosphere.
    Type: Application
    Filed: May 7, 2014
    Publication date: November 20, 2014
    Applicant: Kennametal lndia Limited
    Inventors: Raghavan Rengarajan, Gopalrao Sivaraman, Ramesh Sathyanarayan Rao, Alam Rukhsar, Jagannath Vaishali
  • Patent number: 8889065
    Abstract: An improved sintered material and product. A nanometer size reinforcement powder is mixed with a micron size titanium or titanium alloy powder. After the reinforcement powder is generally uniformly dispersed, the powder mixture is compacted and sintered, causing the nano reinforcement to react with the titanium or titanium alloy, producing a composite material containing nano and micron size precipitates that are uniformly distributed throughout the material.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: November 18, 2014
    Assignee: IAP Research, Inc.
    Inventors: Bhanumathi Chelluri, Edward Arlen Knoth, Edward John Schumaker, Ryan D. Evans, James. L. Maloney, III
  • Patent number: 8858871
    Abstract: In a process, a thermally stable diamond table body and a substrate are stacked on each other at an interface which includes a layer of a imbibiting material interposed between a bottom surface of the body and an upper surface of the substrate. The stack is subjected to a suitable thermal cycle, constituted by heating, temperature maintenance and cooling, which brings at least some of the imbibiting material into the liquid state for migration into the thermally stable diamond table body and substrate at and about the interface so as to join the thermally stable diamond table body to the substrate. The substrate may be produced as a block of dense material constituted by hard particles dispersed in a binder phase, wherein the dense material has been enriched locally with binder phase by imbibition.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: October 14, 2014
    Assignee: Varel International Ind., L.P.
    Inventors: Alfazazi Dourfaye, William King
  • Patent number: 8858870
    Abstract: A method of making an article of manufacture includes positioning a cemented carbide piece comprising at least 5% of the total volume of the article of manufacture, and, optionally, a non-cemented carbide piece in a void of a mold in predetermined positions to partially fill the void and define an unoccupied space. Inorganic particles are added to the mold to partially fill the unoccupied space and provide a remainder space. The cemented carbide piece, the non-cemented carbide piece if present, and the hard particles are heated and infiltrated with a molten metal or a metal alloy. The melting temperature of the molten metal or the metal alloy is less than the melting temperature of the inorganic particles. The molten metal or metal alloy in the remainder space solidifies and binds the cemented carbide piece, the non-cemented carbide piece if present, and the inorganic particles to form the article of manufacture.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: October 14, 2014
    Assignee: Kennametal Inc.
    Inventors: Prakash K. Mirchandani, Morris E. Chandler, Michale E. Waller, Heath C. Coleman
  • Patent number: 8834786
    Abstract: Carbide pellets including relatively small amounts of metallic binder are produced by steps of pressing, comminuting, shaping and sintering. The carbide pellets may be used as wear resistant hard facing materials that are applied to various types of tools. The carbide pellets provide improved mechanical properties such as hardness and abrasiveness while maintaining required levels of toughness and strength.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: September 16, 2014
    Assignee: Kennametal Inc.
    Inventors: Terry Wayne Kirk, Hongbo Tian, Xin Deng, Debangshu Banerjee, Qingjun Zheng
  • Patent number: 8753755
    Abstract: A body, such as a pick tool for cutting coal, includes a steel substrate and a hard face structure fused to the steel substrate. The hard face structure includes at least 1 weight percent Si, at least 5 weight percent Cr and at least 40 weight percent W. Substantially the balance of the hard face structure includes carbon and an iron group metal M selected from Fe, Co, Ni and alloy combinations of these elements. The hard face structure includes a plurality of elongate or platelike micro-structures having a mean length of at least 1 micron, a plurality of nano-particles having a mean size of less than 200 nanometers, and a binder material.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: June 17, 2014
    Assignee: Element Six GmbH
    Inventors: Igor Yuri Konyashin, Bernd Heinrich Ries, Frank Friedrich Lachmann, Kersten Heinrich Schafer
  • Patent number: 8733313
    Abstract: It is an object of the present invention to provide a valve seat product in which the amount of hard particles added to improve the wear resistance of a valve seat of an internal combustion engine is increased, and is excellent in the mechanical strength and machinability.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: May 27, 2014
    Assignee: Nippon Piston Ring Co., Ltd.
    Inventors: Kenichi Sato, Hiroshi Oshige, Takeshi Haniu
  • Publication number: 20140115974
    Abstract: The invention relates to hard-metal body comprising a hard-metal, the hard-metal comprising tungsten carbide grains and metal binder comprising cobalt having a concentration of tungsten dissolved therein, the body comprising a surface region adjacent a surface and a core region remote from the surface, the surface region and the core region being contiguous with each other; the mean binder fraction of the core region being greater than that of the surface region; the mean carbon concentration within the binder being higher in the surface region than in the core region; to tools comprising same and methods of making same.
    Type: Application
    Filed: January 3, 2014
    Publication date: May 1, 2014
    Inventors: Igor Yuri Konyashin, Sebastian Ralf Hlawatschek, Bernd Heinrich Ries, Frank Friedrich Lachmann
  • Publication number: 20140086782
    Abstract: A method for producing a composite material includes providing a composition comprising at least one hardness carrier and a base binder alloy, and sintering the composition. The base binder alloy comprises from 66 to 93 wt.-% of nickel, from 7 to 34 wt.-% of iron, and from 0 to 9 wt.-% of cobalt, wherein the wt.-% proportions of the base binder alloy add up to 100 wt.-%.
    Type: Application
    Filed: May 24, 2012
    Publication date: March 27, 2014
    Applicant: H.C. STARCK GMBH
    Inventor: Benno Gries
  • Publication number: 20140079583
    Abstract: Disclosed herein are titanium-tungsten alloys and composites wherein the tungsten comprises 0.5% to 40% by weight of the alloy. Also disclosed is a method of making such alloys and composites using powders of tungsten less then 3 ?m in size, such as 1 ?m or less. Also disclosed is a method of making the titanium alloy by powder metallurgy, and products made from such alloys or billets that may be cast, forged, or extruded. These methods of production can be used to make titanium alloys comprising other slow-diffusing beta stabilizers, such as but not limited to V, Nb, Mo, and Ta.
    Type: Application
    Filed: March 26, 2013
    Publication date: March 20, 2014
    Applicant: Dynamet Technology, Inc.
    Inventors: Stanley Abkowitz, Susan M. Abkowitz, Harvey Fisher, Patricia J. Schwartz
  • Patent number: 8663359
    Abstract: Methods of forming larger sintered compacts of PCD and other sintered ultrahard materials are disclosed. Improved solvent metal compositions and layering of the un-sintered construct allow for sintering of thicker and larger high quality sintered compacts. Jewelry may also be made from sintered ultrahard materials including diamond, carbides, and boron nitrides. Increased biocompatibility is achieved through use of a sintering metal containing tin. Methods of sintering perform shapes are provided.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: March 4, 2014
    Assignee: Dimicron, Inc.
    Inventors: David P. Harding, Mark E. Richards, Richard H. Dixon, Victoriano Carvajal, Bao-Khang Ngoc Nguyen, German A. Loesener, A. Ben Curnow, Troy J. Medford, Trenton T. Walker, Jeffery K. Taylor, Bill J. Pope
  • Patent number: 8647561
    Abstract: Embodiments of the present invention include methods of producing a composite article. A method comprises introducing a first powdered metal grade from a feed shoe into a first portion of a cavity in a die and a second powdered metal grade from the feed shoe into a second portion of the cavity, wherein the first powder metal grade differs from the second powdered metal grade in chemical composition or particle size. Further methods are also provided. Embodiments of the present invention also comprise composite inserts for material removal operations. The composite inserts may comprise a first region and a second region, wherein the first region comprises a first composite material and the second region comprises a second composite material.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: February 11, 2014
    Assignee: Kennametal Inc.
    Inventors: X. Daniel Fang, David J. Wills, Prakash K. Mirchandani
  • Patent number: 8647562
    Abstract: A process is presented which produces at least one block of dense material constituted by hard particles dispersed in a binder phase, it being possible for the dense material to be enriched locally with binder phase by imbibition. The process includes bringing at least one imbibition area of a surface of the block, preferably coated with a coating material, into contact with an imbibiting material which locally enriches the block with binder phase. The block in contact with the imbibiting material is then subjected to a suitable thermal cycle constituted by heating, temperature maintenance and cooling. This serves to bring some or all of the imbibiting material and the binder phase of the block into the liquid state in such a manner that the enrichment with binder phase takes place solely through the imbibition area. The block is used in connection with the building of a drill bit or tool.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: February 11, 2014
    Assignee: Varel International Ind., L.P.
    Inventors: Alfazazi Dourfaye, Christophe Colin, Elodie Sorlier, Hedi Sellami
  • Publication number: 20140037395
    Abstract: A sintered cemented carbide body comprises tungsten carbide as hard material and a metallic binder which contains cobalt (Co), chromium (Cr) and copper (Cu). The cobalt is present in a proportion of 7.0 to 14.0% by weight in the sintered cemented carbide. The copper proportion is from 0.05 to 3.8% by weight and the chromium proportion is from 0.2 to 1.9% by weight, in each case based on the overall weight of the sintered cemented carbide body. The cemented carbide body is advantageously used for cutting titanium and titanium alloys, cast iron and steel.
    Type: Application
    Filed: August 2, 2013
    Publication date: February 6, 2014
    Applicant: Kennametal, Inc.
    Inventors: Manfed Wolf, Guenter Roder, Armin Helldorfer, Dieter Schmidt
  • Publication number: 20130343944
    Abstract: Material and method for the production of material with isotropic, mechanical properties and improved wear resistance and high hardness potential. Method includes producing in a powder metallurgical (PM) method a slug or ingot from a material of ledeburite tool steel alloy, and subjecting one of the slug or ingot or a semi-finished product produced from the slug or ingot to full annealing at a temperature of over 1100° C., but at least 10° C. below the fusing temperature of the lowest melting structure phase with a duration of over 12 hrs. In this manner, an average carbide phase size of the material is increased by at least 65%, a surface shape of the material is rounded and a matrix is homogenized. Method further includes subsequently processing the material into thermally tempered tools with high wear resistance occurs or into parts to which abrasive stress is applied.
    Type: Application
    Filed: May 7, 2013
    Publication date: December 26, 2013
    Inventor: Boehler Edelstahl GMBH & CO. KG
  • Publication number: 20130315772
    Abstract: A powder metal composition for high wear and temperature applications is made by atomizing a melted iron based alloy including 3.0 to 7.0 wt. % carbon; 10.0 to 25.0 wt. % chromium; 1.0 to 5.0 wt. % tungsten; 3.5 to 7.0 wt. % vanadium; 1.0 to 5.0 wt. % molybdenum; not greater than 0.5 wt. % oxygen; and at least 40.0 wt. % iron. The high carbon content reduces the solubility of oxygen in the melt and thus lowers the oxygen content to a level below which would cause the carbide-forming elements to oxidize during atomization. The powder metal composition includes metal carbides in an amount of at least 15 vol. %. The microhardness of the powder metal composition increases with increasing amounts of carbon and is typically about 800 to 1,500 Hv50.
    Type: Application
    Filed: March 15, 2013
    Publication date: November 28, 2013
    Applicant: Federal-Mogul Corporation
    Inventor: Federal-Mogul Corporation
  • Patent number: 8535407
    Abstract: 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: Grant
    Filed: September 15, 2009
    Date of Patent: September 17, 2013
    Assignee: Element Six GmbH
    Inventors: Igor Yuri Konyashin, Bernd Heinrich Ries, Frank Friedrich Lachmann
  • Patent number: 8523976
    Abstract: The present invention relates to a metal powder mixture that is suitable for producing sintered bodies. The powder mixture is suitable as a binder for hard metals and contains: a) at least one prealloyed powder selected from the group of iron/nickel, iron/cobalt, iron/nickel/cobalt and nickel/cobalt; b) at least one element powder selected from the group of iron, nickel and cobalt or a prealloyed powder selected from the group consisting of iron/nickel, iron/cobalt, iron/nickel/cobalt and nickel/cobalt which is different from component a). The invention also relates to a cemented hard material which uses the inventive powder mixture and a hard material powder, wherein the overall composition of the components a) and b) together contains not more than 90% by weight of cobalt and not more than 70% by weight of nickel and the iron content.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: September 3, 2013
    Assignee: H.C. Starck GmbH
    Inventors: Benno Gries, Leo Prakash
  • Patent number: 8475710
    Abstract: A method of producing a cemented carbide body provides: (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 sinters 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: May 8, 2012
    Date of Patent: July 2, 2013
    Assignee: Sandvik Intellectual Property AB
    Inventor: Ioannis Arvanitidis
  • Publication number: 20130145878
    Abstract: Disclosed is a scissors gear structure and a method of manufacturing the same, wherein the scissors gear can efficiently remove backlash and prevent noise and vibrations, and wherein the scissors gear has improved mechanical properties including strength and wear resistance. The present invention provides a scissors gear without requiring separate manufacturing of expensive scissors pins which must be forcibly inserted, and without requiring expensive processing such as fine wire cutting to form grooves at both ends of the scissors spring.
    Type: Application
    Filed: June 21, 2012
    Publication date: June 13, 2013
    Applicants: KIA MOTORS CORPORATION, HYUNDAI MOTOR COMPANY
    Inventors: Shin Gyu Kim, Ki Bum Kim, Jae Kyu Lee, Tae Hoon Roh, Ki Jung Kim
  • Publication number: 20130126588
    Abstract: Tools for friction stir welding can be made with fewer process steps, lower cost techniques, and/or lower cost ingredients than other state-of-the-art processes by utilizing improved compositions and processes of fabrication. Furthermore, the tools resulting from the improved compositions and processes of fabrication can exhibit better distribution and homogeneity of chemical constituents, greater strength, and/or increased durability. In one example, a friction stir weld tool includes tungsten and rhenium and is characterized by carbide and oxide dispersoids, by carbide particulates, and by grains that comprise a solid solution of the tungsten and rhenium. The grains do not exceed 10 micrometers in diameter.
    Type: Application
    Filed: January 22, 2013
    Publication date: May 23, 2013
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventor: BATTELLE MEMORIAL INSTITUTE
  • Patent number: 8425652
    Abstract: There is disclosed a method of making a ready to press cemented carbide powder with low compaction pressure suitable for the production of submicron cemented carbide by means of powder metallurgical techniques milling, pressing and sintering. The method comprises using from about 1 to about 3 wt-% pressing agent with the following composition, less than about 90 wt-% PEG and from about 10 to about 75 wt-% of blends of high molecular (C12-<C20) saturated or unsaturated fatty acids, or salts thereof containing at least one element of Al, Ba, Ca, Co, Cr, Mg, N, Na, V, Zn. Preferably the grain size of the cemented carbide powder is submicron. In a preferred embodiment the method includes a dry pre-milling of the hard constituents mainly WC-powder for about 2-45 hours in ball mills with cemented carbide milling bodies or using other suitable dry milling techniques prior to a wet milling step. The invention also relates to the powder obtained by the method.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: April 23, 2013
    Assignee: Sandvik Intellectual Property AB
    Inventors: Ove Alm, Alistair Grearson, Susanne Norgren
  • Publication number: 20130078133
    Abstract: An elevated refractory alloy with ambient-temperature and low-temperature ductility and the method thereof is disclosed, that is, at least four high-melting point metal elements are composed with at least four carbides of the high-melting point metal elements through a high-temperature alloy process, the carbides is dissolved in the high-melting point metal elements, therefore the high-melting point metal elements are wet and composed with the carbides, consequently the crystallographic structure composed by the high-melting point metal elements and the carbides is changed from a body-centered cubic structure to a face-centered cubic structure. Therefore, at least four high-melting point metal elements are composed with corresponding carbides of the four high-melting point metal elements and an alloy material is made through high-temperature, wherein the crystallographic structure of the alloy material is a face-centered cubic structure so as to let that the alloy material is convenient machined.
    Type: Application
    Filed: September 26, 2011
    Publication date: March 28, 2013
    Inventor: Swe-Kai CHEN
  • Publication number: 20130015939
    Abstract: The present invention provides a powder magnetic core which has a low iron loss and an excellent constancy of magnetic permeability and is suitably used as a core for a reactor mounted on a vehicle. The powder magnetic core is a compact of a mixed powder containing an iron-based soft magnetic powder having an electrical insulating coating formed on its surface and a powder of a low magnetic permeability material having a heat-resistant temperature of 700° C. or higher than 700° C. and a relative magnetic permeability of not more than 1.0000004. The density of the compact is 6.7 Mg/m3 or more, and the low magnetic permeability material exists in the gap among the soft magnetic powder particles in the green compact.
    Type: Application
    Filed: March 25, 2011
    Publication date: January 17, 2013
    Applicant: HITACHI POWDERED METALS CO. LTD.
    Inventors: Takashi Inagaki, Chio Ishihara
  • Patent number: 8355815
    Abstract: Methods include one or more of robotically positioning a cutting element on an earth-boring tool, using a power-driven device to move a cutting element on an earth-boring tool, and robotically applying a bonding material for attaching a cutting element to an earth-boring tool. Robotic systems are used to robotically position a cutting element on an earth-boring tool. Systems for orienting a cutting element relative to a tool body include a power-driven device for moving a cutting element on or adjacent the tool body. Systems for positioning and orienting a cutting element on an earth-boring tool include such a power-driven device and a robot for carrying a cutting element. Systems for attaching a cutting element to an earth-boring tool include a robot carrying a torch for heating at least one of a cutting element, a tool body, and a bonding material.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: January 15, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: David Keith Luce, Sean W. Wirth, Alan J. Massey, Crystal A. Parrott
  • Patent number: 8329093
    Abstract: A method for preparing metal-matrix composites including cold-process isostatic compaction of previously mixed powders and hot-process uniaxial pressing of the resulting compact is disclosed. The method enables metal-matrix composites with improved properties to be obtained. A device for implementing isostatic compaction comprising a latex sheath into which the mixture of powders is poured, a perforated cylindrical container in which the latex sheath is arranged, and means for sealed insulation of the mixture of powders contained in the sheath is also disclosed.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: December 11, 2012
    Assignee: Forges de Bologne
    Inventor: Jacques Tschofen
  • Patent number: 8309018
    Abstract: Methods of forming bit bodies for earth-boring bits include assembling green components, brown components, or fully sintered components, and sintering the assembled components. Other methods include isostatically pressing a powder to form a green body substantially composed of a particle-matrix composite material, and sintering the green body to provide a bit body having a desired final density. Methods of forming earth-boring bits include providing a bit body substantially formed of a particle-matrix composite material and attaching a shank to the body. The body is provided by pressing a powder to form a green body and sintering the green body. Earth-boring bits include a unitary structure substantially formed of a particle-matrix composite material. The unitary structure includes a first region configured to carry cutters and a second region that includes a threaded pin. Earth-boring bits include a shank attached directly to a body substantially formed of a particle-matrix composite material.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: November 13, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Redd H. Smith, John H. Stevens, James L. Duggan, Nicholas J. Lyons, Jimmy W. Eason, Jared D. Gladney, James A. Oxford, Benjamin J. Chrest
  • Patent number: 8303681
    Abstract: 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: Grant
    Filed: August 8, 2007
    Date of Patent: November 6, 2012
    Assignee: Seoul National University Industry Foundation
    Inventors: Shin-Hoo Kang, Jin-Kwan Jung, Han-Jung Kwon
  • Patent number: 8298479
    Abstract: A process for forming a remateable machined titanium powder base alloy connecting rod using a titanium alloy powder having an average particle size of about 1-20 microns, a mean aspect ratio of about 5 to 300, and a specific surface area of at least about 25 m2/g.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: October 30, 2012
    Inventor: Gerald Martino
  • Publication number: 20120251377
    Abstract: A method for enhancing strength and hardness of powder metallurgy stainless steels comprises steps of fabricating a stainless steel powder into a green compact; placing the green compact in a reducing environment and maintaining the green compact at a sintering temperature to form a sintered body; and placing the sintered body in a carbon-bearing atmosphere and maintaining the sintered body at a carburizing temperature below 600° C. to implant carbon atoms into the sintered body and form carburized regions in the sintered body. Thereby, the strength and hardness of powder metallurgy stainless steels can be improved. As the carburizing temperature is lower than 600° C., chromium would not react with carbon. Therefore, the strength and hardness of powder metallurgy stainless steels can be enhanced and the superior corrosion resistance is still preserved.
    Type: Application
    Filed: March 29, 2011
    Publication date: October 4, 2012
    Inventors: Kuen-Shyang Hwang, Li-Hui Cheng, Yung-Chung Lu
  • Patent number: 8273290
    Abstract: A method for producing a composite metal material includes preparing a solution containing a surfactant having both hydrophilicity and hydrophobicity, dispersing a nanosized to micro-sized fine carbonaceous substance into a state of being monodispersed in the solution, bringing the solution having the dispersed fine carbonaceous substance into contact with surface of a metal powder particle, drying the metal powder particle to make the fine carbonaceous substance in the monodispersed state adhere to the surface of the metal powder particle via a component of the solution, and thermally decomposing and removing the solution component adhering to the surface of the metal powder particle by heat-treating the metal powder particle either in a hydrogen-containing reducing atmosphere or in a vacuum atmosphere to partially expose the surface of the metal powder particle out of the adhering fine carbonaceous substance, and thus progress diffusion and sintering among the metal powder particles through exposed parts.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: September 25, 2012
    Assignees: National University Corporation Hokkaido University
    Inventors: Katsuyoshi Kondoh, Bunshi Fugetsu
  • Patent number: 8211358
    Abstract: A cemented carbide including WC, a binder phase based on Co, Ni or Fe, and gamma phase, in which said gamma phase has an average grain size <1 ?m. A method of making the cemented carbide is provided in which the powders forming gamma phase are added as mixed cubic carbides of one or more of Ti, Ta, Nb, Zr, Hf and V, and a ratio, fWC, between an amount of WC (in mol fraction of WC) and an equilibrium gamma phase WC content at a sintering temperature (in mol fraction WC) is given by fWC=xWC/xeWC, wherein fWC is 0.6 to 1.0.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: July 3, 2012
    Assignee: Sandvik Intellectual Property AB
    Inventors: Bo Jansson, Susanne Norgren
  • Patent number: 8168117
    Abstract: A powder metallurgy method includes the steps of forming a member, such as a work piece or an aerospace component, from a titanium alloy powder. The average size of a carbide phase in the titanium alloy powder is controlled in order to control an average size of a carbide phase in the member. In one example, an amount of carbon within the titanium alloy and size of the carbide phase are selected to provide a desirable balance of good hot workability, resisting formation of an alpha-titanium phase within the member and a desired level of fatigue performance.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: May 1, 2012
    Assignee: United Technologies Corporation
    Inventor: James O. Hansen
  • 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: 8119062
    Abstract: A method for manufacturing a cutting insert green body having undercuts includes providing a die cavity formed in closed top and bottom dies; closing a bottom of the die cavity by a bottom punch accommodated in a punch tunnel formed in the bottom die; filling the die cavity with a pre-determined amount of sinterable powder; moving a top punch towards the die cavity through a punch tunnel formed in the top die; compacting the powder by urging the top and bottom punches towards each other, thereby forming the green body; and moving the top die and punch away from the bottom die and punch, thereby enabling removal of the formed green body. An apparatus for manufacturing a cutting insert green body having undercuts includes top and bottom dies which abut each other and top and bottom punches which slide in their respective dies.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: February 21, 2012
    Assignee: Iscar, Ltd.
    Inventors: Carol Smilovici, Osama Atar, Assaf Ballas, Basem Dakwar
  • Publication number: 20120003488
    Abstract: Carbide pellets including relatively small amounts of metallic binder are produced by steps of pressing, comminuting, shaping and sintering. The carbide pellets may be used as wear resistant hard facing materials that are applied to various types of tools. The carbide pellets provide improved mechanical properties such as hardness and abrasiveness while maintaining required levels of toughness and strength.
    Type: Application
    Filed: June 30, 2010
    Publication date: January 5, 2012
    Applicant: Kennametal Inc.
    Inventors: Terry Wayne Kirk, Hongbo Tian, Xin Deng, Debangshu Banerjee, Qingjun Zheng
  • Patent number: 8075661
    Abstract: An ultra-hard composite material and a method for manufacturing the same, including mixing a metal carbide powder and a multi-element high-entropy alloy powder to form a mixture, green compacting the mixture, and sintering the mixture to form the ultra-hard composite material. The described multi-element high-entropy alloy consists of five to eleven principal elements, with every principal element occupying a 5 to 35 molar percentage of the alloy.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: December 13, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Chi-San Chen, Chih-Chao Yang, Jien-Wei Yeh, Chin-Te Huang
  • Publication number: 20110262295
    Abstract: A method of making a hard particle-dispersed metal matrix-bonded composite, includes the steps of mixing hard particles and ductile metal particles to yield a mixture, and sintering the mixture under a pressure of less than 2.0 GPa and at a temperature of less than 1200° C. for a sufficient time to yield the composite. A composite material made by the above method is disclosed.
    Type: Application
    Filed: April 21, 2010
    Publication date: October 27, 2011
    Inventors: Oleg A. Voronov, Bernard H. Kear