Molybdenum Sulfide Or Functional Constituent (e.g., Lubricant, Abrasive, Etc.) Patents (Class 75/231)
  • Patent number: 8992659
    Abstract: A metal powder composition including: an iron or iron-based powder composition, and a lubricating combination including a substance A, a substance B, and a substance C; wherein: substance A is a polyolefin, substance B is chosen from a group of saturated and unsaturated fatty acid amides, saturated and unsaturated fatty acid bisamides, saturated fatty alcohols and fatty acid glycerols, and substance C is an amide oligomer having a molecular weight between 500 g/mol and 30 000 g/mol; and wherein the amounts of respective substances A, B and C in weight percent of the iron or iron-based powder composition are: 0.05?A+B<0.4 wt %, C?0.3 wt %, A+B+C?2.0 wt %, and the relation between substances A and B is: B/A>0.5. Also, a method of producing a metal powder composition and a method for producing a green component.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: March 31, 2015
    Assignee: Hoganas AB (Publ)
    Inventors: Mats Larsson, Karin Olsson, Hilmar Vidarsson
  • Publication number: 20140352495
    Abstract: A sintered bearing has a structure in which Ni—P alloy particles having an average diameter of 10 to 100 ?m are dispersed in an amount of 1 to 20% by mass in a Cu-based sintered alloy base, a Fe—Cu-based sintered alloy base or a Cu—Ni-based sintered alloy base. The Ni—P alloy particles are derived from a raw material powder comprising 1 to 12% by mass of P; and a remainder composed of Ni and inevitable impurities. The Cu-based sintered alloy base contains no less than 40% by mass of Cu. The Fe—Cu-based sintered alloy base contains no more than 50% by mass of Fe. The Cu—Ni-based sintered alloy base contains 20 to 40% by mass of Ni and 0.1 to 1.0% by mass of P; or contains 10 to 25% by mass of Ni, 10 to 25% by mass of Zn and 0.1 to 1.0% by mass of P.
    Type: Application
    Filed: February 21, 2013
    Publication date: December 4, 2014
    Applicant: DIAMET CORPORATION
    Inventor: Yoshinari Ishii
  • Patent number: 8876935
    Abstract: A sintered material for valve guides consists of, by mass %, 1.3 to 3% of C, 1 to 4% of Cu, 0.01 to 0.08% of P, 0.05 to 0.5% of Sn, and the balance of Fe and inevitable impurities. The sintered material exhibits a metallic structure made of pores and a matrix. The matrix is a mixed structure of a pearlite phase, a ferrite phase, an iron-phosphorus-carbon compound phase, and at least one of a copper-tin alloy phase and a combination of a copper phase and a copper-tin alloy phase. A part of the pores includes graphite that is dispersed therein. The iron-phosphorus-carbon compound phase is dispersed at 3 to 25% by area ratio, and the copper-tin alloy phase and the combination of the copper phase and the copper-tin alloy phase are dispersed at 0.5 to 3.5% by area ratio, with respect to a cross section of the metallic structure, respectively.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 4, 2014
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventors: Hiroki Fujitsuka, Hideaki Kawata
  • Patent number: 8858675
    Abstract: A powder metallurgical combination is provided comprising an iron-based powder A comprising core particles of iron to which core particles nickel is diffusion alloyed and wherein said nickel diffusion alloyed to said core particles comprises 4-7% (preferably 4.5-6%) by weight of said iron-based powder A, and a powder B substantially consisting of particles of pure iron. Further a method is provided for preparing a powder metallurgical combination.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: October 14, 2014
    Assignee: Hoganas AB (Publ)
    Inventor: Mats Larsson
  • Patent number: 8845776
    Abstract: The present invention relates to sliding material provided by sintering a lead-free copper or copper alloy and contains at least one mineral selected from the group consisting of talc, mica, kaolinite mineral and montmorillonite mineral. Pb has conventionally been included in sliding materials for the purpose of obtaining conformability and seizure resistance. Despite the absence of Pb, the Pb-free copper-based sliding material and sliding parts according to the present invention have improved sliding properties.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: September 30, 2014
    Assignee: Taiho Kogyo Co., Ltd.
    Inventors: Ryo Mukai, Atsushi Koyama, Nahomi Hamaguchi, Kao Mouri, Hiromi Yokota
  • Patent number: 8801828
    Abstract: A powder metal material comprises pre-alloyed iron-based powder including carbon present in an amount of 0.25 to 1.50% by weight of the pre-alloyed iron-based powder. Graphite is admixed in an amount of 0.25 to 1.50% by weight of the powder metal material. The admixed graphite includes particles finer than 200 mesh in an amount greater than 90.0% by weight of the admixed graphite. Molybdenum disulfide is admixed in an amount of 0.1 to 4.0% by weight of the powder metal material, copper is admixed in an amount of 1.0 to 5.0% by weight of the powder metal material, and the material is free of phosphorous. The powder metal material is then compacted and sintered at a temperature of 1030 to 1150° C. At least 50% of the admixed graphite of the starting powder metal material remains as free graphite after sintering.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: August 12, 2014
    Assignee: Federal-Mogul Corporation
    Inventors: Denis Boyd Christopherson, Jr., Leslie John Farthing, Jeremy Raymond Koth
  • Patent number: 8795407
    Abstract: An iron-based powder composition is provided comprising, in addition to an iron-based powder, a minor amount of a machinability improving additive comprising at least one silicate from the group of phyllosilicates. The technology further concerns the use of the machinability improving additive and a method for producing an iron-based sintered part having improved machinability.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: August 5, 2014
    Assignee: Hoganas AB (Publ)
    Inventors: Olof Andersson, Bo Hu
  • Patent number: 8753417
    Abstract: A self-lubricating, friction and wear reducing composite useful over a wide temperature range is described herein. The composite includes metal bonded chromium oxide dispersed in a metal binder having a substantial amount of nickel. The composite contains a fluoride of at least one Group I, Group II, or rare earth metal, and optionally a low temperature lubricant metal.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: June 17, 2014
    Assignee: The United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Christopher DellaCorte, Brian J Edmonds
  • Patent number: 8734561
    Abstract: A bonded metallurgical powder composition including: an iron-based powder having a weight average particle size in the range of 20-60 ?m, in an amount of at least 80 percent by weight of the composition, graphite powder in an amount between 0.15-1.0 percent by weight of the composition, a binding agent in an amount between 0.05-2.0 percent by weight of the composition, a flow agent in an amount between 0.001-0.2 percent by weight of the composition; wherein the graphite powder is bound to the iron-based powder particles by means of the binding agent, and wherein the powder composition has an apparent density of at least 3.10 g/cm3 and a hall flow rate of at most 30 s/50 g. Also, a method for producing a sintered component with improved strength from the inventive composition, as well as to a heat treated sintered component produced according to said method.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: May 27, 2014
    Assignee: Hoganas AB (Pub)
    Inventor: Mats Larsson
  • Patent number: 8709124
    Abstract: There is provided a novel sintered sliding member superior in thermal resistance, corrosion resistance and wear resistance. The sintered sliding member of the present invention includes 7.7-30.3% Cu, 2.0-20.0% Sn and 0.3-7.0% boron nitride by mass, with a remainder composed of Ni and unavoidable impurities. The sintered sliding member may further include 0.1-3.0% C or 0.1-0.7% P. A porosity of the sintered sliding member is 5-25%.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: April 29, 2014
    Assignee: Diamet Corporation
    Inventors: Yoshinari Ishii, Tsuneo Maruyama, Yoshiki Tamura
  • Publication number: 20140109723
    Abstract: Provided is a sintered friction material exhibiting high braking power, and being excellent in stability of braking power at a high temperature. The sintered friction material of the present invention includes a chemical composition containing: by mass %, Fe of 7.5% or more, Cu of 50% or more, graphite of 5 to 15%, molybdenum disulfide of 0.3 to 7%, and silica of 0.5 to 10%, wherein Fe/Cu is 0.15 to 0.40.
    Type: Application
    Filed: March 28, 2012
    Publication date: April 24, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Fumio Ishimoto, Futoshi Katsuki, Kazutaka Asabe, Osamu Kanda
  • Patent number: 8702835
    Abstract: A water-atomized iron-based steel powder is provided which comprises by weight-%: 0.45-1.50 Ni, 0.30-0.55 Mo, less than 0.3 Mn, less than 0.2 Cu, less than 0.1 C, less than 0.25 O, less than 0.5 of unavoidable impurities, and the balance being iron, and where Ni and Mo have been alloyed by a diffusion alloying process.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: April 22, 2014
    Assignee: Hoganas AB (Publ)
    Inventors: Yang Yu, Norimitsu Hirose
  • Patent number: 8617288
    Abstract: A sintered material for valve guides consists of, by mass %, 0.01 to 0.3% of P, 1.3 to 3% of C, 1 to 4% of Cu, and the balance of Fe and inevitable impurities. The sintered material exhibits a metallic structure made of pores and a matrix. The matrix is a mixed structure of a pearlite phase, a ferrite phase, an iron-phosphorus-carbon compound phase, and a copper phase, and a part of the pores including graphite that is dispersed therein. The iron-phosphorus-carbon compound phase is dispersed at 3 to 25% by area ratio, and the copper phase is dispersed at 0.5 to 3.5% by area ratio, with respect to a cross section of the metallic structure, respectively.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: December 31, 2013
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventors: Hiroki Fujitsuka, Hideaki Kawata
  • Publication number: 20130143059
    Abstract: A coated article system includes a substrate and a surface coating on the substrate. The surface coating is formed by depositing individual particles of a composite metal powder with sufficient energy to cause the composite metal powder to bond with the substrate and form the surface coating. The composite metal powder includes a substantially homogeneous dispersion of molybdenum and molybdenum disulfide sub-particles that are fused together to form the individual particles of the composite metal powder.
    Type: Application
    Filed: January 28, 2013
    Publication date: June 6, 2013
    Applicant: CLIMAX ENGINEERED MATERIALS, LLC
    Inventor: CLIMAX ENGINEERED MATERIALS, LLC
  • 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
  • Patent number: 8398739
    Abstract: A composition comprising water atomised prealloyed iron-based steel powder is provided which steel powder comprises by weight-%: 0.2-1.5 Cr, 0.05-0.4 V, 0.09-0.6 Mn, less than 0.1 Mo, less than 0.1 Ni, less than 0.2 Cu, less than 0.1 C, less than 0.25 O, less than 0.5 of unavoidable impurities, the balance being iron. A method of forming a sintered component, and component additionally are provided.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: March 19, 2013
    Assignee: Hoganas AB (Publ)
    Inventors: Sven Bengtsson, Anna Larsson
  • Publication number: 20130028780
    Abstract: A powder metal material comprises pre-alloyed iron-based powder including carbon present in an amount of 0.25 to 1.50% by weight of the pre-alloyed iron-based powder. Graphite is admixed in an amount of 0.25 to 1.50% by weight of the powder metal material. The admixed graphite includes particles finer than 200 mesh in an amount greater than 90.0% by weight of the admixed graphite. Molybdenum disulfide is admixed in an amount of 0.1 to 4.0% by weight of the powder metal material, copper is admixed in an amount of 1.0 to 5.0% by weight of the powder metal material, and the material is free of phosphorous. The powder metal material is then compacted and sintered at a temperature of 1030 to 1150° C. At least 50% of the admixed graphite of the starting powder metal material remains as free graphite after sintering.
    Type: Application
    Filed: August 3, 2012
    Publication date: January 31, 2013
    Inventors: Denis Boyd Christopherson, JR., Leslie John Farthing, Jeremy Raymond Koth
  • Patent number: 8282701
    Abstract: A small diameter, elongated steel article, comprising fully consolidated, prealloyed metal powder is disclosed. The consolidated metal powder has a microstructure that has a substantially uniform distribution of fine grains having a grain size of not larger than about 9 when determined in accordance with ASTM Standard Specification E 112. The microstructure of the consolidated metal powder is further characterized by having a plurality of substantially spheroidal carbides uniformly distributed throughout the consolidated metal powder that are not greater than about 6 microns in major dimension and a plurality of sulfides uniformly distributed throughout the consolidated metal powder wherein the sulfides are not greater than about 2 microns in major dimension. A process for making the elongated steel article is also disclosed.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: October 9, 2012
    Assignee: CRS Holdings, Inc.
    Inventors: Olivier Schiess, Pierre Marechal, Gregory J. Del Corso
  • Patent number: 8277533
    Abstract: A most preferred composition for the mixture, prior to sintering into an article (ideally a valve seat insert), is as follows: 35% hard phase, 65% matrix (excepting incidental impurities), the hard phase component being 2.2% C, 29.1% Cr, 4.9% Co, 5.3% Ni, 20.2% W with the balance being Fe and allowing less than 2% for one or more machinability aids and solid lubricants, and the matrix component being one of a high chrome steel powder (e.g. 18% Cr, 1% Ni, 2.5% Mo, balance Fe), a low alloy steel powder (3% Cu, 1% C, balance Fe; 3% Cr, 0.5% Mo, 1% C, balance Fe; 4% Ni, 1.5% Cu, 0.5% Mo, 1% C, balance Fe; 4% Ni, 2% Cu, 1.4% Mo, 1% C, balance Fe), or a tool steel powder (5% Mo, 6% W, 4% Cr, 2% V, 1% C, balance Fe), or a low-alloy steel powder as above but which issued in conjunction with a copper infiltration process during sintering.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: October 2, 2012
    Assignee: Federal-Mogul Sintered Products Limited
    Inventors: Leslie John Farthing, Paritosh Maulik
  • Patent number: 8257462
    Abstract: A powder metal material comprises pre-alloyed iron-based powder including carbon present in an amount of 0.25 to 1.50% by weight of the pre-alloyed iron-based powder. Graphite is admixed in an amount of 0.25 to 1.50% by weight of the powder metal material. The admixed graphite includes particles finer than 200 mesh in an amount greater than 90.0% by weight of the admixed graphite. Molybdenum disulfide is admixed in an amount of 0.1 to 4.0% by weight of the powder metal material, copper is admixed in an amount of 1.0 to 5.0% by weight of the powder metal material, and the material is free of phosphorous. The powder metal material is then compacted and sintered at a temperature of 1030 to 1150° C. At least 50% of the admixed graphite of the starting powder metal material remains as free graphite after sintering.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: September 4, 2012
    Assignee: Federal-Mogul Corporation
    Inventors: Denis Boyd Christopherson, Jr., Leslie John Farthing, Jeremy Raymond Koth
  • Patent number: 8216338
    Abstract: Disclosed is a composition for a bush-type bearing, a bush-type bearing manufactured using the composition, and a method of manufacturing the bush-type bearing. The bearing has excellent friction characteristics with a shaft made of iron (Fe) based material, and thus is able to increase the lubrication cycle of a lubricant. Further, the bearing has excellent hardness, and thus is able to prevent plastic deformation under high contact pressure.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: July 10, 2012
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: Dong-Seob Shim, Chung-Rea Lee
  • Patent number: 8197885
    Abstract: A method for producing a metal article according to one embodiment may include: Providing a supply of a sodium/molybdenum composite metal powder; compacting the sodium/molybdenum composite metal powder under sufficient pressure to form a preformed article; placing the preformed article in a sealed container; raising the temperature of the sealed container to a temperature that is lower than a sintering temperature of molybdenum; and subjecting the sealed container to an isostatic pressure for a time sufficient to increase the density of the article to at least about 90% of theoretical density.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: June 12, 2012
    Assignee: Climax Engineered Materials, LLC
    Inventors: Dave Honecker, Christopher Michaluk, Carl Cox, James Cole
  • Publication number: 20120096988
    Abstract: The present invention relates to sliding material provided by sintering a lead-free copper or copper alloy and contains at least one mineral selected from the group consisting of talc, mica, kaolinite mineral and montmorillonite mineral. Pb has conventionally been included in sliding materials for the purpose of obtaining conformability and seizure resistance. Despite the absence of Pb, the Pb-free copper-based sliding material and sliding parts according to the present invention have improved sliding properties.
    Type: Application
    Filed: April 27, 2010
    Publication date: April 26, 2012
    Applicant: TAIHO KOGYO CO., LTD.
    Inventors: Ryo Mukai, Atsushi Koyama, Nahomi Hamaguchi, Kao Mouri, Hiromi Yokota
  • Patent number: 8142904
    Abstract: The present invention relates to a copper-based sintered slide member comprising 0.5 to 20% by weight of tin, 0.1 to 35% by weight of manganese, 2 to 25% by weight of a solid lubricant and the balance essentially consisting of copper; and a multilayer copper-based sintered slide member comprising a copper-based alloy sintered layer and a metal backing plate which are formed into an integral multilayer structure, wherein the copper-based alloy sintered layer comprises 0.5 to 20% by weight of tin, 0.1 to 35% by weight of manganese, 2 to 25% by weight of a solid lubricant and the balance essentially consisting of copper. The above slide members are in the form of a lead-free copper-based sintered slide member.
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: March 27, 2012
    Assignee: Oiles Corporation
    Inventors: Shoichiro Iwahashi, Kazuo Kato, Takehiro Shirosaki, Takashi Kikkawa
  • Patent number: 8110020
    Abstract: An annealed pre-alloyed water atomised iron-based powder suitable for the production of pressed and sintered components having high wear resistance is provided. The iron-based powder comprises 10-below 18% by weight of Cr, 0.5-5% by weight of each of at least one of Mo, W, V and Nb, and 0.5-2%, preferably 0.7-2% and most preferably 1-2% by weight of C. The powder has a matrix comprising less than 10% by weight of Cr, and comprises large M23C6-type carbides in combination with M7C3-type carbides. A method for production of the iron-based powder, a method for producing a pressed and sintered component having high wear resistance, and a component having high wear resistance are provided.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: February 7, 2012
    Assignee: Höganäs AB (PUBL)
    Inventors: Ola Bergman, Paul Dudfield Nurthen
  • Patent number: 8038760
    Abstract: A method for producing a metal article according to one embodiment may involve the steps of: Providing a composite metal powder including a substantially homogeneous dispersion of molybdenum and molybdenum disulfide sub-particles that are fused together to form individual particles of the composite metal powder; and compressing the molybdenum/molybdenum disulfide composite metal powder under sufficient pressure to cause the mixture to behave as a nearly solid mass.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: October 18, 2011
    Assignee: Climax Engineered Materials, LLC
    Inventors: Matthew C. Shaw, Carl V. Cox, Yakov Epshteyn
  • Patent number: 7892481
    Abstract: A manufacturing method for wear resistant sintered member is provided. The method includes: compacting a raw powder containing a matrix forming powder and a hard phase forming powder into a green compact, the matrix forming powder containing 90 mass % or more of a powder having the maximum particle diameter of 46 ?m, and the hard phase forming powder being 40 to 70 mass % with respect to the raw powder; and sintering the green compact.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: February 22, 2011
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventors: Tatsuaki Yoshihiro, Hideaki Kawata, Hiroki Fujitsuka, Kunio Maki, Toru Tsuboi
  • Patent number: 7691172
    Abstract: Provided is iron-based metal powder for powder metallurgy including a metallic soap containing at least one or more types selected from a group of Ag, Au, Bi, Co, Cu, Mo, Ni, Pd, Pt, Sn, Te and W having a higher standard oxidization potential than iron, and an iron sintered body having a rust prevention function, wherein at least one or more types of metallic soap selected from a group of Ag, Au, Bi, Co, Cu, Mo, Ni, Pd, Pt, Sn, Te and W having a higher standard oxidization potential than iron is added to iron-based metal powder for powder metallurgy, and sintering is performed thereto. As a result, obtained is mixed powder for powder metallurgy capable of improving the rust prevention effect easily without having to hardly change the conventional processes.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: April 6, 2010
    Assignee: Nippon Mining & Metals Co., Ltd.
    Inventors: Toru Imori, Atsushi Nakamura, Yasushi Narusawa, Masataka Yahagi
  • Patent number: 7604678
    Abstract: The present invention relates to improved metallurgical powder compositions, methods for the preparation of those compositions, and methods for using those compositions to make compacted parts. The metallurgical powder compositions comprise a base metal powder, such as an iron-based or nickel-based powder, to which is added or blended an organometallic lubricant. Organometallic lubricants are monomers or polymers having a metal-carbon bond or metalloid-carbon bond on the polymer backbone, which degrade into physical property enhancing compounds upon heating. The metallurgical powder compositions can also comprise small amounts of other commonly used alloying powders, binding agents, and lubricants.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: October 20, 2009
    Assignee: Hoeganaes Corporation
    Inventor: George Poszmik
  • Patent number: 7572312
    Abstract: A sintered valve seat includes: a matrix; 5 to 40 mass % of a hard phase dispersed in the matrix, the hard phase containing 48 to 60 mass % of Mo; 3 to 12 mass % of Cr; 1 to 5 mass % of Si; and the balance of Co and inevitable impurities; and a structure in which a Cr sulfide is dispersed around the hard phase. The hard phase is formed with a Co base alloy matrix and compounds which are mainly composed of Mo silicides and are integrally precipitated in the Co base alloy matrix.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: August 11, 2009
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventors: Hideaki Kawata, Hiroki Fujitsuka
  • Patent number: 7524352
    Abstract: Certain preferred embodiments of the present invention relate to compositions for the production of sintered molded parts, components/parts produced therefrom, and methods for preparing such compositions. In accordance with certain embodiments, compositions for production of sintered molded parts comprise a metal-based, a ceramic-based, and/or a polymer-based powder, and a compaction aid, having 25 to 60 weight percent of a polyglycol, based on the total weight of the compaction aid, and 40 to 75 weight percent of a montan wax, based on the total weight of the compaction aid. The compaction aid may be present in an amount from about 0.1 to 5 weight percent, preferably 0.5 to 1.5 weight percent, based on the total weight of the composition. The composition may also include a lubricant such as, for example, MoS2, WS2, BN, MnS, and/or carbon.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: April 28, 2009
    Assignee: GKNM Sinter Metals GmbH
    Inventors: Rene Lindenau, Klaus Dollmeier, Volker Arnhold
  • Patent number: 7491256
    Abstract: The invention concerns an iron-based powder composition comprising, in addition to the iron-based powder, 0.02% and 1.0%, weight of a machinability improving additive, comprising calcium fluoride and hexagonal boron nitride. The invention also concerns the additive per se.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: February 17, 2009
    Assignee: Höganäs AB
    Inventor: Olof Andersson
  • Patent number: 7473295
    Abstract: The invention concerns a stainless steel powder comprising at least 10% chromium by weight. The powder further comprises vanadium in an amount of at least 4 times the amount of carbon and nitrogen. Preferably the steel powder comprises 10-30% chromium, 0.1-1% vanadium, 0.5-1.5% silicon, at least 0.1% carbon and at least 0.07% nitrogen. The invention also concerns a powder metallurgical composition containing said steel powder, a process for preparing and a compacted and sintered part made of said composition.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: January 6, 2009
    Assignee: Höganäs AB
    Inventors: Owe Mårs, Ricardo Canto Leyton, Ola Bergman
  • Patent number: 7473296
    Abstract: A wear-resistant iron-based sintered contact material is provided which is sintered by powder sintering so as to have high density, high seizure resistance and wear resistance. A wear-resistant iron-based sintered composite contact component composed of the wear-resistant iron-based sintered contact material sinter-bonded to a backing metal and its producing method are also provided. To this end, at least Cr7C3-type carbide and/or M6C-type carbide which have an average particle diameter of 5 ?m or more are precipitately dispersed in an amount of 20 to 50% by volume within an iron-based martensite parent phase which has a hardness of HRC 50 or more even when tempered at up to 600° C.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: January 6, 2009
    Assignee: Komatsu, Ltd.
    Inventors: Takemori Takayama, Kazuo Okamura, Yoshikiyo Tanaka, Tetsuo Ohnishi
  • Patent number: 7387658
    Abstract: A method of making cemented carbide at which powders forming hard constituents and powders forming binder phase are wet milled together with a pressing agent is disclosed. The slurry is dried, preferably by spray drying, compacted into bodies of desired shape and sintered. A cemented carbide powder with a reduced compacting pressure at a predetermined weighing in of 18% shrinkage can be obtained by using from about 1 to about 3 wt-% pressing agent with the following composition: less than about 90 wt-% PEG and greater than about 10 wt-% of long chain C?20 fatty acids, their esters and salts, in particular, erucic acid and/or behenic acid. The invention also relates to a cemented carbide powder with low compaction pressure.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: June 17, 2008
    Assignee: Sandvik Intellectual Property AB
    Inventors: Alistair Grearson, Jonathan Fair, Rickard Sandberg
  • Patent number: 7294166
    Abstract: A brush body 4 of a metal-graphite brush 2 is composed of a commutator side portion 6 which contains graphite, copper and a metal sulfide solid lubricant, and a lead side portion 8 which contains graphite and copper but does not contain any metal sulfide solid lubricant. A lead wire 10 is attached to the lead side portion 8 containing no metal sulfide solid lubricant.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: November 13, 2007
    Assignees: Tris Inc., Denso Corporation
    Inventors: Takayoshi Otani, Mitsuo Ikeda, Yoichi Sakaura, Naoki Morita, Kyoji Inukai, Youichi Murakami, Yasuyuki Wakahara, Masami Niimi
  • Patent number: 7250070
    Abstract: A method of forming a powder metal fractured bearing component, such as a connecting rod, includes the step of forming a component blank having a bearing aperture for separation of the component blank into a main body and a bearing cap, wherein the component has a hardness in the range of about HRC 22 to about HRC 34. The method also includes the steps of forming a stress riser in the blank where the fracture is to occur, and fracturing the component blank of the connecting rod into a main body and a bearing cap by applying tensile force thereto, in order to form a surface area ratio of >113% on the mating surfaces of the main body and the bearing cap.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: July 31, 2007
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masaki Amano, Hideaki Ushio
  • Patent number: 7217310
    Abstract: Provided is metallic powder for powder metallurgy having iron as its principal component and containing indium soap, or metallic powder for powder metallurgy further comprising at least one type selected among bismuth soap, nickel soap, cobalt soap, copper soap, manganese soap and aluminum soap in such indium soap. Thereby obtained is metallic powder for powder metallurgy capable of easily improving the rustproof effect without having to hardly change the conventional process.
    Type: Grant
    Filed: September 1, 2003
    Date of Patent: May 15, 2007
    Assignee: Nippon Mining & Metals Co., Ltd.
    Inventors: Masataka Yahagi, Toru Imori, Atsushi Nakamura, Yasushi Narusawa, Seiji Masuda
  • Patent number: 7179318
    Abstract: The present invention aims at preventing abrasion of relatively sliding members under a high pressure or/and high temperature condition. It also aims at preventing seizure of the sliding contact surfaces at high temperatures. The sliding member of the present invention serves as one of a pair of relatively sliding members essentially consisting of stainless steel as base material containing 5% to 10% by weight of cobalt, 1 to 5% by weight of molybdenum disulfide and 2% to 5% by weight of calcium fluoride.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: February 20, 2007
    Assignee: Eagle Industry Co., Ltd.
    Inventor: Yoshihiro Mura
  • Patent number: 7052526
    Abstract: A magnesium base composite material is provided such that compound particles generated by a solid-phase reaction with magnesium are uniformly dispersed in a magnesium alloy body. The compound particles dispersed in the body comprise magnesium silicide (Mg2Si) and magnesium oxide (MgO) so that the magnesium base composite material may have excellent strength, hardness and abrasion resistance and tempered opponent aggression.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: May 30, 2006
    Assignee: Toudai TLO, Ltd.
    Inventor: Katsuyoshi Kondoh
  • Patent number: 7033413
    Abstract: A soft magnetic powder material which includes an iron system powdered particle having an insulating coat with high insulation performance, a polyamide system resin, and a thermoplastic resin having a melting point equal to or higher than 200° C.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: April 25, 2006
    Assignees: Aisin Seiki Kabushiki Kaisha, Hoeganaes AB
    Inventors: Yoshiharu Iyoda, Kota Maruyama, Naoki Kamiya
  • Patent number: 7014677
    Abstract: The object of the invention is to provide an iron based sintered body suitable for being enveloped in light metal alloy such as an aluminum alloy by casting, and a method for producing the same. A mixed powder is prepared by mixing an iron based powder, a copper powder and a graphite powder blended so that the Cu content and the C content are 5 to 40% by mass and 0.5 to 2.5% by mass, respectively, in the mixed powder. A lubricant powder and a fine particle powder for improving machinability may be further added in the mixed powder. Then, the mixed powder is filled into a mold formed to a green compact, and is sintered into a sintered body so that the sintered body has a desired average thermal expansion coefficient. The surface of the sintered body may be adjusted to have a surface roughness Rz of 10 to 100 ?m optionally by applying a shot blast treatment or by a shot blast treatment and an additional steam treatment.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: March 21, 2006
    Assignees: Nippon Piston Ring Co., Ltd., Fuji Jukogyo Kabushiki Kaisha
    Inventors: Hiroshi Takiguchi, Teruyuki Oda
  • Patent number: 6958084
    Abstract: A sintered material and a method for the production thereof is described. The material comprises an alloy selected from one of the groups having a composition comprising in weight %: either Cr 5-30/Mo 0-15/Ni 0-25/W 0-15/C 0-5/Si 0-5/Fe 0-5/Mn 0-5/others 10 max/Co balance, or Cr 10-20/Mo 0-15/Co 0-20/W 0-5/Fe 0-20/Al 0-5/Ti 0-5/others 15 max/Ni balance; said alloy having incorporated therein from 3-15 weight % of Sn; and optionally from 1-6 weight % of a solid lubricant material.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: October 25, 2005
    Assignee: Federal-Mogul Sintered Products Limited
    Inventors: Iain Robert Whitaker, Richard Jameson Pavey
  • Patent number: 6951578
    Abstract: PCD materials of this invention comprise diamond crystals that are bonded together with a catalyst/binder material. The PCD material is prepared by combining diamond grains with a catalyst/binder material either as a premixture or by infiltration during sintering. The PCD material comprises 15 percent by volume or less diamond grains sized 20 micrometers or less. The diamond grains are pressurized under elevated temperature conditions to form the desired PCD material. PCD materials of this invention can constitute the exclusive material phase of a PCD construction, or can form one or more material phase in a multi-phase material microstructure, wherein the multiple material phase can be arranged in an ordered/oriented or random fashion. PCD materials of this invention display improved properties of impact and fatigue resistance, and functional toughness, when used in complex wear environments, when compared to conventional PCs materials comprising intentionally added fine-sized diamond grains.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: October 4, 2005
    Assignee: Smith International, Inc.
    Inventors: Daniel J. Belnap, Nathan R. Anderson, Zhigang Fang, Anthony Griffo, Brian A. White
  • Patent number: 6951579
    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: Grant
    Filed: February 24, 2003
    Date of Patent: October 4, 2005
    Assignee: Teikoku Piston Ring Co., Ltd.
    Inventor: Yoshio Koyama
  • Patent number: 6905530
    Abstract: In a preliminary molding step 1, a metallic powder mixture 7 obtained by blending an iron-based metal powder 7a with graphite 7b such that the graphite is present in an amount of preferably not less than 0.1% by weight, more preferably not less than 0.3% by weight, is compacted into a preform 8 having a density of not less than 7.3 g/cm3. In a provisional sintering step 2, the preform 8 is provisionally sintered at a predetermined temperature to form a metallic powder-molded body 9 having a structure in which the graphite remains along a grain boundary of the metal powder. In a re-compaction step 3, the metallic powder-molded body 9 is re-compacted into a re-compacted body 10. In a re-sintering step 4, the re-compacted body 10 is re-sintered to obtain a sintered body 11. In a heat treatment step 5, the sintered body 11 is heat-treated to obtain a heat-treated sintered body 11.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: June 14, 2005
    Assignees: Unisia Jecs Corporation, Kawasaki Steel Corporation
    Inventors: Takashi Yoshimura, Hiroyuki Amma, Masashi Fujinaga, Mitsumasa Iijima, Yasuo Hatai, Takayuki Matsumoto, Satoshi Uenosono, Shigeru Unami
  • Patent number: 6890368
    Abstract: The present invention provides: a material, which is dense, with a density of ?90%, bulk dry self-lubricating, with a coefficient of friction of <0.3, constituted by a matrix that endows it with suitable strength, with a Rm of ?400 MPa in a medium to high temperature range of 300° C.???600° C.; said matrix including particles of solid lubricant in its volume; mechanical parts formed from said material; a method of manufacturing said material.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: May 10, 2005
    Assignees: SNECMA Moteurs, SNECMA Services
    Inventors: Frédéric Braillard, Claude Mons, Philippe Perruchaut, Didier Ribot, Joël Vigneau
  • Patent number: 6852174
    Abstract: There is disclosed a powder magnetic core in which a permeability does not easily drop even when an applied magnetic field intensifies, comprising: a bulk body containing a main component of a powder of an Fe-base alloy having a soft magnetic property, and the balance substantially including a heat-treated insulation binder and a void, wherein an aspect ratio of the powder is in a range of 1 to 1.5, and a volume ratio of the powder in the bulk body is in a range of 40 to 60 volume %, and an initial permeability (?0) has a value which satisfies 6??0?20, and a relation of ?/?0?0.5 is established between K and A, when the permeability is ? with an applied magnetic field of 24 kA/m.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: February 8, 2005
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Satoshi Takemoto, Takanobu Saito
  • Patent number: 6843823
    Abstract: A braze preform and a method for making the braze preform are disclosed. The braze preform includes a filler metal that has been sintered to produce a liquid phase of at least a portion of the filler metal.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: January 18, 2005
    Assignee: Caterpillar Inc.
    Inventor: William L. Kovacich
  • Patent number: 6837915
    Abstract: High theoretical density, metal-based materials containing graphite or hexagonal boron nitride have low coefficients of friction and wear rates are useful for bearings, bushings and other articles subject to bearing loads.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: January 4, 2005
    Assignee: SCM Metal Products, Inc.
    Inventors: Stephen D. Dunmead, James M. Marder