Consolidation Of Powder Prior To Sintering Patents (Class 419/38)
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Patent number: 8173065Abstract: The present invention provides an apparatus, system and method for handling glass containers that has a takeout jaw assembly with a base with a first side, a second side and a groove. The groove extends from the first side to the second side and is adapted to fit an insert. The groove also has a recess with one or more flexible retaining tabs positioned to secure the insert and a yoke extending substantially perpendicular from the base.Type: GrantFiled: September 30, 2008Date of Patent: May 8, 2012Inventor: Fred Heldoorn
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Publication number: 20120105184Abstract: An anisotropic rare earth sintered magnet has a tetragonal R2Fe14B compound as a major magnetic phase, wherein R is Nd or a mixture of Nd with at least one rare earth element. Grains of the compound phase have two crystallographic axes, c and a-axes aligned. The biaxially aligned magnet exhibits a coercivity Hc of at least 1.6 MA/m.Type: ApplicationFiled: October 24, 2011Publication date: May 3, 2012Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventor: Ken Ohashi
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Patent number: 8163232Abstract: A method for manufacturing functionally graded cemented tungsten carbide with hard and wear-resistant surface and tough core is described. The said functionally graded cemented tungsten carbide (WC—Co) has a surface layer having a reduced amount of cobalt. Such a hard surface and tough core structure is an example of functionally graded materials in which mechanical properties are optimized by the unique combination of wear-resistance and toughness. WC—Co with reduced-cobalt surface layer may be fabricated through a carburization heat treatment process following conventional liquid phase sintering. The graded WC—Co thus obtained contains no brittle ? phase.Type: GrantFiled: October 28, 2008Date of Patent: April 24, 2012Assignee: University of Utah Research FoundationInventors: Zhigang Zak Fang, Peng Fan, Jun Guo
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Patent number: 8153052Abstract: The present invention provides a method for forming a refractory metal-intermetallic composite. The method includes providing a first powder comprising a refractory metal suitable for forming a metal phase; providing a second powder comprising a silicide precursor suitable for forming an intermetallic phase; blending the first powder and the second powder to form a powder blend; consolidating and mechanically deforming the powder blend at a first temperature; and reacting the powder blend at a second temperature to form the metal phase and the intermetallic phase of the refractory metal-intermetallic composite, wherein the second temperature is higher than the first temperature.Type: GrantFiled: September 26, 2003Date of Patent: April 10, 2012Assignee: General Electric CompanyInventors: Melvin Robert Jackson, Bernard Patrick Bewlay, Judson Sloan Marte, Pazhayannur Ramanathan Subramanian, Ji-Cheng Zhao, Ann Melinda Ritter
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Patent number: 8153053Abstract: A method for forming a compact from a powder wherein a forming portion 1A in a mold body 2 is filled with a raw powder and upper and lower punches 3,4 are fitted into the forming portion 1A to form the compact. Prior to filling the forming portion 1A with the raw powder M, a solution L with a lubricant being uniformly dissolved in a solvent is applied to a peripheral portion of the forming portion 1A, and then the solution is evaporated, thus forming a crystallized layer B thereon. Thus, the reduction of a force for ejecting the compact is realized, while improving the density of the compact, realizing the stable and successive production of the compact.Type: GrantFiled: December 22, 2009Date of Patent: April 10, 2012Assignee: Diamet CorporationInventors: Takashi Nakai, Kinya Kawase
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Publication number: 20120082587Abstract: A water-atomised 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: ApplicationFiled: May 21, 2010Publication date: April 5, 2012Applicant: HOGANAS AB (PUBL)Inventors: Yang Yu, Norimitsu Hirose
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Publication number: 20120073303Abstract: A process of producing a metallic component having a desired shape that includes at least one nonuniform section, as well as metallic components produced by such a process. The process uses a composition containing a mixture of a polymeric binder and a metal powder that includes particles of an alloy having a reactive element that renders the alloy uncastable. The composition is metal injection molded to yield a green compact having a shape corresponding to the shape of the metallic component, including its at least one nonuniform section. A majority of the binder is then removed from the green compact, and then the green compact is sintered to remove a remainder of the binder and fuse particles of the metal powder together to form the metallic component and the nonuniform section thereof.Type: ApplicationFiled: May 6, 2011Publication date: March 29, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Michael John McCarren, Michael William Peretti, Stephen William Freund
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Publication number: 20120060797Abstract: A method of forming a fuel injector clamp utilizing powder metal techniques is provided. A powder metal charge comprising in percent by weight, 0.6-0.9 carbon, 1.5-3.9 copper, 93.2-97.9 iron with the balance other elements, is die compacted to a density of 7.0-7.1 grams per cubic centimeter pre-sintered at 1500-1600 degrees Fahrenheit to form a powder metal blank. The powder metal blank is then lubricated and re-compacted to at least 7.3 grams per cubic centimeter and sintered at 2050 degrees Fahrenheit to form a final powder metal blank. The fuel injector clamp itself is comprised of a unitary structure of powder metal having a generally cylindrical center portion, with a first wing portion extending laterally there from and a second wing portion extending laterally there from at a 180 degree angle from the first wing portion.Type: ApplicationFiled: September 10, 2010Publication date: March 15, 2012Applicant: Burgess-Norton Mfg. Co., Inc.Inventors: John R. Engquist, Richard S. Hennen
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Patent number: 8133329Abstract: One embodiment includes compacting a powder material using at least a first magnetic field to form a compact and selectively sintering a first portion of the compact and leaving a second portion of the compact unsintered to form a component.Type: GrantFiled: June 24, 2008Date of Patent: March 13, 2012Assignee: GM Global Technology Operations LLCInventor: Shekhar G. Wakade
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Patent number: 8128757Abstract: There is provided a method of manufacturing a permanent magnet having extremely high orientation by arranging such that the crystal fractures of alloy raw meal powder having more equal crystal orientational relationship are combined in magnetic field. In this invention, alloy raw meal powder is filled into a cavity and, while agitating the alloy raw meal powder inside the cavity, is oriented in the magnetic field. This oriented body is then compression molded in the magnetic field into a predetermined shape.Type: GrantFiled: November 19, 2007Date of Patent: March 6, 2012Assignee: Ulvac, Inc.Inventors: Hiroshi Nagata, Yoshinori Shingaki
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Patent number: 8119062Abstract: 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: GrantFiled: April 28, 2010Date of Patent: February 21, 2012Assignee: Iscar, Ltd.Inventors: Carol Smilovici, Osama Atar, Assaf Ballas, Basem Dakwar
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Patent number: 8114186Abstract: A method for manufacturing of iron—respectively micro-alloyed steel powders, starting from fluffy spray roasted iron oxides exhibiting a specific surface area in excess of 2.0 m2/g and residual chloride contents over 440 ppm Cl?, decrease the chloride content in two steps to less than 100 ppm, the specific surface area (BET) of to a pre-selected value of less than 10.0 m2/g, preferably between 0.1 and 2.0 m2/g and reduce the pre-sintered granules exhibiting a bulk density in excess of 1.200 g/dm3.Type: GrantFiled: December 3, 2007Date of Patent: February 14, 2012Inventor: Michael J. Ruthner
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Patent number: 8110049Abstract: An RE-containing alloy, which is represented by a compositional formula of RrTtAa (wherein R represents at least one rare earth element selected from among La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Tm, Yb, Gd, and Lu; T collectively represents transition metal elements containing at least Fe atoms, a portion of the Fe atoms being optionally substituted by at least one species selected from among Co, Ni, Mn, Pt, and Pd; A represents at least one element selected from among Al, As, Si, Ga, Ge, Mn, Sn, and Sb; and r, t, and a have the following relationships: 5.0 at. %?r?6.8 at. %, 73.8 at. %?t?88.7 at. %, and 4.6 at. %?a?19.4 at. %) and having an alloy microstructure containing an NaZn13-type crystal structure in an amount of at least 85 mass % and ?-Fe in an amount of 5-15 mass % inclusive.Type: GrantFiled: February 17, 2010Date of Patent: February 7, 2012Assignee: Showa Denko K.K.Inventor: Kenichiro Nakajima
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Publication number: 20120009080Abstract: 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: ApplicationFiled: July 11, 2011Publication date: January 12, 2012Applicant: Climax Engineered Materials, LLCInventors: Matthew C. Shaw, Carl V. Cox, Yakov Epshteyn
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Publication number: 20120006676Abstract: A method for producing a composite metal powder according to one embodiment of the invention may comprise: Providing a supply of molybdenum metal powder; providing a supply of a potassium compound; combining the molybdenum metal powder and the potassium compound with a liquid to form a slurry; feeding the slurry into a stream of hot gas; and recovering the composite metal powder.Type: ApplicationFiled: July 8, 2011Publication date: January 12, 2012Applicant: Climax Engineered Materials, LLCInventors: David Honecker, Michael Carducci, Carl Cox, Christopher Michaluk
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Publication number: 20110318213Abstract: A sintered structure and method for forming it are disclosed. The method includes obtaining core-shell particles having a core material and a shell material, forming the particles into a powder compact, and annealing the powder compact at an annealing temperature. The shell material is a metal that diffuses faster than the core material at the annealing temperature and diffuses to the contacts between the core-shell particles during annealing to form sintered interfaces between the core-shell particles. The sintered structure can have discontinuous regions of shell material between the sintered interfaces. The core material can be a metal, semiconductor or ceramic. The core material can be copper and the shell material can be silver. The sintered interfaces can be almost purely shell material. The annealing temperature can be significantly lower than the temperature needed to form interfaces between particles of the core material without the shell material.Type: ApplicationFiled: September 8, 2010Publication date: December 29, 2011Inventors: Carol Anne Handwerker, Suk Jun Kim, Eric A. Stach
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Publication number: 20110318214Abstract: A water atomised prealloyed chromium-free, iron-based steel powder is provided which comprises by weight-%: 0.05-0.4 V, 0.09-0.3 Mn, less than 0.1 Cr, 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, and less than 0.5 of unavoidable impurities, with the balance being iron.Type: ApplicationFiled: March 15, 2010Publication date: December 29, 2011Applicant: HOGANAS AB (PUBL)Inventor: Sven Bengtsson
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Patent number: 8075838Abstract: A compression molding which is high in both dimensional accuracy and mechanical strength is difficult to manufacture by a powder molding process. Especially, a molding including a soft magnetic material with high soft magnetic properties is difficult to manufacture. A composite metal molding according to the present invention includes metal particles and the carbide of a resin intervening among the particles. It is manufactured by coating metal particles with a resin, molding the prepared molding material under pressure into a predetermined shape, and heating the prepared pressurized preform to calcine the resin and weld mutually the particles. The carbide of the resin has a weight ratio of 0.001 to 2% to the metal particles when the particles have their proportion expressed as 100. The particles have a weld ratio of 10 to 80%. The particles preferably contain a soft magnetic material and the resin is preferably a furan resin.Type: GrantFiled: July 16, 2010Date of Patent: December 13, 2011Assignee: Canon Denshi Kabushiki KaishaInventors: Junji Hamana, Isamu Kawada, Naoaki Maruyama
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Patent number: 8075661Abstract: 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: GrantFiled: April 25, 2008Date of Patent: December 13, 2011Assignee: Industrial Technology Research InstituteInventors: Chi-San Chen, Chih-Chao Yang, Jien-Wei Yeh, Chin-Te Huang
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Patent number: 8071016Abstract: A method is disclosed of forming a powder metal compact. Powder metal is placed in an annular space of a compaction die tool set in which the annular space has inner and outer cylindrical surfaces that form inner and outer cylindrical surfaces of the powder metal compact. An elastomeric tool has a first cylindrical surface adjacent to a fixed cylindrical surface of the compaction die tool set that is radially fixed and further has a second cylindrical surface, opposite to the first cylindrical surface, that touches the powder metal. The powder metal is compressed to form the powder metal compact by applying an external axial force on the elastomeric tool while maintaining the diameter of the fixed cylindrical surface so as to cause the elastomeric tool to compress the second cylindrical surface of the elastomeric tool against the powder metal.Type: GrantFiled: September 21, 2007Date of Patent: December 6, 2011Assignee: GKN Sinter Metals LLCInventors: Timothy M. Campbell, Joel H. Mandel, Donald J. Phillips, Donald D. Cooper, Henry J. Knott
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Publication number: 20110286873Abstract: The composition includes the iron as the main particulate metallic material; at least one particulate alloy element, with the function of hardening the ferrous structural matrix; and a precursor non-metallic particulate compound, generally a carbide or a carbonate, which is capable of generating, upon its dissociation during the sintering, graphite nodules, whose formation is facilitated: by the precursor compound itself when it includes a chemical element which stabilizes the iron alpha phase of the ferrous structural matrix; or by an additional alloy element included in the composition and which is defined by a chemical element that stabilizes the iron alpha phase during the sintering. The composition can be conformed by compaction or by powder injection molding. The process of the invention leads to obtaining products in self-lubricating sintered steel from said composition.Type: ApplicationFiled: December 9, 2009Publication date: November 24, 2011Inventors: Roberto Binder, Aloisio Nelmo Klein, Cristiano Binder, Waldyr Ristow Junior
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Publication number: 20110265757Abstract: A powder metal mixture is disclosed that provides improved mechanical properties for parts made from powder metal, such as cam caps. The powder metal mixture, upon sintering, forms an S phase intermetallic in the Al—Cu—Mg alloy system. The S phase is present in a concentration that results in an enhanced response to cold work strengthening of the powder metal part. Further, by minor adjustments to certain alloy elements, such as tin, the tensile properties of the resultant part may be adjusted.Type: ApplicationFiled: October 6, 2009Publication date: November 3, 2011Inventors: Donald Paul Bishop, Christopher D. Boland, Ian W. Donaldson, Richard L. Hexemer Jr.
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Patent number: 8043404Abstract: Disclosed herein are extruded titanium metal matrix composites with enhanced ductility. Also disclosed is the extrusion at high extrusion ratio of titanium metal matrix composites produced by powder metal processes. The ductility and machinability of these titanium metal matrix composites extruded at high extrusion ratios combined with their wear resistance and excellent imaging characteristics makes these high extrusion ratio extruded titanium metal matrix composites useful as biological implants, including prosthetic devices. Also disclosed are articles such as orthopedic implants for knee, hip, spine or other biomedical devices, with enhanced properties, made from the disclosed extruded material.Type: GrantFiled: February 17, 2006Date of Patent: October 25, 2011Assignee: Dynamet Technology, Inc.Inventors: Stanley Abkowitz, Susan M. Abkowitz, Harvey Fisher, Patricia J. Schwartz
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Publication number: 20110256016Abstract: A metal injection molding process for manufacturing a MIM article with a final main body and a final threaded hole defined in the final main body, is provided. The metal injection molding process includes forming a green MIM article including a green body, the green body having the same shape as, but larger than the final main body; tapping the green body to define a green threaded hole in the green body, the green threaded hole having the same shape, but larger than the final threaded hole; debinding the green MIM article to remove the plastic binders from between the metal powders; and sintering the green MIM article to form the MIM article by shrinking the green body to form the final main body and shrinking the green threaded hole to form the final threaded hole.Type: ApplicationFiled: December 16, 2010Publication date: October 20, 2011Applicants: FIH (HONG KONG) LIMITED, SHENZHEN FUTAIHONG PRECISION INDUSTRY CO., LTD.Inventors: LING-BIN ZENG, GUO-BIN HONG
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Publication number: 20110239823Abstract: The present invention is directed to electrically conductive compacted metal parts fabricated using powder metallurgy methods. The iron-based powders of the invention are coated with magnetic or pre-magnetic materials.Type: ApplicationFiled: March 29, 2011Publication date: October 6, 2011Applicant: HOEGANAES CORPORATIONInventors: Kalathur S. Narasimhan, Francis G. Hanejko
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Publication number: 20110244419Abstract: To reduce the production costs for medical instruments (preferably endodontic root canal files) and increase their attractiveness to dentists/doctors, a medical instrument assembly is provided, which is made by metal injection molding and comprises at least two medical instruments (1-6) and a runner (7a, 7b) that interconnects said at least two medical instruments (1-6) and is formed integrally therewith. Each of the at least two medical instruments (1-6) have a grip portion (13-15; 23-25) at a distal end that offers a grip for a hand or a tool such as a dental hand-piece, and each of the medical instruments (1-6) is removable from the runner (7a, 7b) by breaking it away from the runner (7a, 7b), irrespective of an adjacent medical instrument. The medical instruments may be of the same or of different size, may be disposable, and the assembly preferably is sterile and contained in a closed sterile package.Type: ApplicationFiled: June 16, 2011Publication date: October 6, 2011Applicant: TOFFT PROMOTION AKTIEBOLAGInventor: Klas Tofft
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Patent number: 8025710Abstract: Provided are an ancillary material, used for shape processing, which is capable of shortening a processing time, avoiding a reduction in quality of a shape provided to a workpiece material, and allowing a relatively low manufacturing cost; a processing method using the ancillary material; and a method of manufacturing the ancillary material. The tungsten alloy grains (1) comprise: tungsten of greater than or equal to 80% by mass and less than or equal to 98% by mass; nickel; at least one kind of metal selected from the group consisting of iron, copper, and cobalt; and an inevitable impurity, a maximum diameter thereof is greater than or equal to 0.1 mm and less than or equal to 5.00 mm, and a specific surface area thereof is less than or equal to 0.02 m2/g. The tungsten alloy grains (1, 10), the workpiece material (30), an abrasive (20) are blended in a container (100) and the container is rotated, thereby processing the shape of the workpiece material (30).Type: GrantFiled: November 20, 2006Date of Patent: September 27, 2011Assignee: A.L.M.T. Corp.Inventors: Shinji Kikuhara, Hitoshi Inoue, Noboru Uenishi, Satoshi Umemoto
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Publication number: 20110224718Abstract: A surgical needle driver including a pair of jaws. The pair of jaws includes an upper jaw and a lower jaw, where the lower jaw has an outer surface facing an outer surface of the upper jaw. The outer surface of each jaw each has a plurality of polygonal pyramidal teeth configured to engage a surgical needle. Each of the plurality of polygonal pyramidal teeth has more than four exposed faces. A method of manufacturing the needle driver or components of the needle driver includes a powder injection molding process.Type: ApplicationFiled: March 10, 2010Publication date: September 15, 2011Inventor: Clinton D. Torgerson
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Patent number: 8017070Abstract: A method of sintering a 17-4PH alloy powder and a sintered 17-4PH sintered part are disclosed. The part is formed by selective laser sintering a 17-4PH alloy powder and binder mixture to form a green part that is sintered to form a part having a substantially pure martensitic structure. The metal powder includes boron. The sintered part may be further processed by shot peening to improve crack resistance.Type: GrantFiled: May 17, 2007Date of Patent: September 13, 2011Assignee: The Boeing CompanyInventors: Steven C. Low, Jerry G. Clark, Neal W Muylaert, Richard J. Nord, Blair E. Thompson, Bryan E. Ake, Reid W. Williams
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Patent number: 8007713Abstract: Disclosed are a sintered composite machine part as a cylinder block for piston pumps or piston motors, and a manufacturing method thereof. The machine part has an air-tight main body of sintered porous iron alloy and having an iron oxide layer on the surface; and a sliding part of sintered porous copper alloy being bonded direct to the main body. The sliding part is to be slid in tight contact with a fluid supply/return device. The manufacturing is made by preparing a main body of sintered porous iron alloy and a green compact for sliding part from a raw material metal powder having a composition corresponding to the copper alloy; sintering the green compact for sliding part in contact with the main body to bond the sliding part to the main body by diffused junction; and subjecting the main body to steam treatment to provide an iron oxide layer.Type: GrantFiled: November 13, 2007Date of Patent: August 30, 2011Assignee: Hitachi Powdered Metals Co., Ltd.Inventor: Michiharu Mogami
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Publication number: 20110206944Abstract: The present invention relates to a process for producing shaped articles composed of refractory metals.Type: ApplicationFiled: June 18, 2007Publication date: August 25, 2011Applicant: H.C. Starck GmbHInventors: Henning Uhlenhut, Uwe Blümling, Klaus Andersson, Bernd Döbling, Michael Svec, Karl-Hermann Buchner
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Patent number: 7993576Abstract: A method for producing a sintered body includes: a) molding a composition containing a powder primarily made of an inorganic material and a binder including an aliphatic carbonic acid ester based resin in a predetermined shape so as to obtain a compact; b) exposing the compact to a first atmosphere containing an alkaline gas and thus decomposing and removing the aliphatic carbonic acid ester based resin from the compact so as to obtain a degreased body; and c) sintering the degreased body so as to obtain a sintered body.Type: GrantFiled: March 14, 2008Date of Patent: August 9, 2011Assignee: Seiko Epson CorporationInventors: Masaaki Sakata, Nobuyuki Hamakura
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Patent number: 7985371Abstract: A method for forming a remateable cracked titanium powder base alloy connecting rod using a titanium alloy powder processed to produce a connecting rod.Type: GrantFiled: June 24, 2008Date of Patent: July 26, 2011Inventor: Gerald Martino
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Publication number: 20110176950Abstract: A high-strength sintered compact is produced at low cost using an alloy steel powder for powder metallurgy containing no nickel or copper by compacting the alloy steel powder for powder metallurgy or a mixed powder containing the alloy steel powder at a pressure of 700 MPa or more and sintering the compact at a temperature of 1,150° C. to 1,300° C. The alloy steel powder used contains 0.3% to 0.7% by mass of chromium, 0.1% to 0.5% by mass of manganese, 0.1% to 0.5% by mass of molybdenum, and 0.25% to 0.5% by mass of oxygen, the balance being iron and incidental impurities.Type: ApplicationFiled: September 18, 2009Publication date: July 21, 2011Applicant: JFE STEEL CORPORATIONInventors: Shigeru Unami, Yukiko Ozaki, Tadayuki Tsutsui, Yuji Yamanishi
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Patent number: 7981192Abstract: The invention relates to a process for producing binderless briquettes from metal chips and metal dusts in which the metal chips are pressed into a cup-shaped form and the upwardly open cavity produced as a result is filled with metal dust, after which the opening is closed with a cover consisting of pressed metal chips.Type: GrantFiled: April 17, 2008Date of Patent: July 19, 2011Assignee: Egon Evertz KG(GmbH & Co)Inventors: Egon Evertz, Ralf Evertz, Stefan Evertz
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Publication number: 20110171056Abstract: A powder consists essentially by weight, of 28.00?R?32.00%, where R is at least one rare earth element including Y and the sum of Dy+Tb>0.5, 0.50?B?2.00%, 0.50?Co?3.50%, 0.050?M?0.5%, where M is one or more of the elements Ga, Cu and Al, 0.25 wt %<O?0.5%, 0.15% or less of C, balance Fe.Type: ApplicationFiled: March 24, 2011Publication date: July 14, 2011Applicant: Vacuumschmelze GmbH & Co. KGInventors: Rolf Blank, Matthias Katter, Werner Rodewald, Boris Wall
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Publication number: 20110170238Abstract: At least one of a valve metal sintered capacitor anode body and a suboxide valve metal sintered capacitor anode body with a particle density of >88% of a theoretical density.Type: ApplicationFiled: August 25, 2009Publication date: July 14, 2011Applicant: H.C. STARCK GMBHInventors: Christoph Schnitter, Holger Brumm
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Patent number: 7972545Abstract: A device and a method for manufacturing an end mill in which the amount of grinding of a blank end mill is small. The device for manufacturing an end mill includes: upper and lower punches; a die; a feed box for supplying a powder of material for the end mill; and a cleaner for eliminating the powder from a top surface of the die. The upper and lower punches are movable up and down relative to each other and have a lengthwise molding cavity formed thereon. The die has a penetrating slit sized to be approximated to the width of the upper and lower punches. The penetrating slit allows the up-and-down movements of the upper and lower punches. The feed box supplies the powder into a space formed by the wall of the penetrating slit and the lower punch.Type: GrantFiled: June 11, 2007Date of Patent: July 5, 2011Assignee: TaeguTec, Ltd.Inventor: Byung Gyun Bae
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Patent number: 7959706Abstract: A sintering compound containing a sinterable powder and a binder removable in a debinding step is injected into a metal mold set provided with a sintering compound injecting mold, in a sintering compound molding step (S104). An add-on forming compound which becomes removable or separable from the sintering compound injection molded body in the debinding step or the sintering step is injected into the metal mold set provided with an add-on mold in an add-on forming step (S102). The sintering compound injection molded body and the add-on are formed integrally with each other in the metal mold set. The integral formation of the add-on and the sintering compound injection molded body enables to prevent damage during release from the mold and make easy to handle the injection molded body.Type: GrantFiled: December 29, 2009Date of Patent: June 14, 2011Assignee: Taisei Kogyo, Ltd.Inventor: Shigeo Tanaka
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METHOD AND DEVICE FOR PRODUCING A WORKPIECE, PARTICULARLY A SHAPING TOOL OR A PART OF A SHAPING TOOL
Publication number: 20110129380Abstract: A method for producing a workpiece, particularly a shaping tool or a part of a shaping tool, includes the following steps: providing a heat-resistant mold (2) with a first molded part (2a) and at least a second molded part (2b) in a chamber that can be evacuated (1); filling a metal-containing material into the heat-resistant mold (2); producing a vacuum in the chamber that can be evacuated (1); heating the metal-containing material; compressing the heated metal-containing material in the heat-resistant mold (2) by hot pressing under vacuum conditions. The present invention further relates to a device for producing a workpiece, particularly a shaping tool or a part of a shaping tool.Type: ApplicationFiled: May 23, 2009Publication date: June 2, 2011Applicant: ROVALMA, S.A.Inventor: Isaac Valls Angles -
Publication number: 20110129379Abstract: The invention relates to a method for manufacturing a massive component substantially wholly made of intermetallic material, comprising the steps of: a) preparing a mixture of powders of at, least two metallic elements, the powders being present in the mixture in a proportion by weight corresponding to the atomic percentage in which the at least two metallic elements are present in a corresponding intermetallic compound which may be formed from these metallic elements; b) applying a plurality of layers of such a mixture of powders by cold spraying on a substrate so as to obtain, on the substrate, a preform of metallic mixture of predetermined thickness; c) thermally treating at least the preform of metallic mixture so as to cause the reaction between the at least two metallic elements to form the corresponding intermetallic compound; and d) removing the substrate, thus obtaining the massive component made of intermetallic material.Type: ApplicationFiled: November 24, 2010Publication date: June 2, 2011Inventors: Giovanni Paolo Zanon, Simone Vezzu', Silvano Rech, Andrea Trentin, Diego Basset
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Patent number: 7946035Abstract: A method of manufacturing a hollow article (10) comprising the steps of cold pressing two members (30,34) to form at least one depression (32,36) in the members (30,34). Arranging the two members (30,34) in abutting relationship such that the at least one depression (32,36) defines at least one chamber between the two members (30,34). Sealing (41) the edges (40,42) of the two members (30,34) together to form a core structure (44). Positioning the core structure (44) in a mold (46) to define a cavity (48) between the external surface (50) of the core structure (44) and the internal surface (52) of the mold (46), the internal surface (52) of the mold (46) substantially defining the external shape of the hollow article (10). Filling the cavity (48) between the core structure (44) and the mold (46) with a powder material (54), sealing the open edge of the core structure (44) to the mold (46).Type: GrantFiled: March 15, 2007Date of Patent: May 24, 2011Assignee: Rolls-Royce PLCInventor: Ewan F. Thompson
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Patent number: 7947219Abstract: In a process for manufacturing composite sintered machine components, the composite sintered machine component has an approximately cylindrical inner member and an approximately disk-shaped outer member, the inner member has pillars arranged in a circumferential direction at equal intervals and a center shaft hole surrounded by the pillars, and the outer member has holes corresponding to the pillars of the inner member and a center shaft hole corresponding to the center shaft hole of the inner member and connected to the holes. The process comprises compacting the inner member and the outer member individually using an iron-based alloy powder or an iron-based mixed powder so as to obtain compacts of the inner member and the outer member, tightly fitting the pillars of the inner member into the holes of the outer member, and sintering the inner member and the outer member while maintaining the above condition so as to bond them together.Type: GrantFiled: November 1, 2007Date of Patent: May 24, 2011Assignee: Hitachi Powdered Metals Co., Ltd.Inventors: Hiromasa Imazato, Koichiro Yokoyama
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Publication number: 20110097233Abstract: A camshaft journal and method of producing the same. The method uses dynamic magnetic compaction in conjunction with austenitic manganese steel powder metal precursors. Journals formed along the camshaft are configured to cooperate with complementary bearing surfaces, and can be used in cooperation with one or more sensors such that the journal does not magnetically interfere with signals travelling to such sensors. The journals may also be subjected to machining, sintering or both once the dynamic magnetic compaction has been completed.Type: ApplicationFiled: October 22, 2009Publication date: April 28, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventor: Shekhar G. Wakade
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Patent number: 7931756Abstract: A method of making a rare-earth alloy granulated powder according to the present invention includes the steps of: preparing a rare-earth alloy powder; generating remnant magnetization in the powder; and granulating the powder by utilizing agglomeration force produced by the remnant magnetization of the powder. Since the agglomeration force produced by the remnant magnetization is utilized, the addition of a granulating agent may be omitted.Type: GrantFiled: October 5, 2009Date of Patent: April 26, 2011Assignee: Hitachi Metals, Ltd.Inventors: Futoshi Kuniyoshi, Tomoiku Otani
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Patent number: 7931856Abstract: A method of forming a crankshaft bushing or similar component is provided. A compaction die is provided having an axial, generally cylindrical internal opening. An upper and a lower punch are provided with exterior surfaces corresponding to the internal opening of the compaction die. An upper core rod passes through an axial opening in the upper punch. A lower core rod passes through an axial opening in the lower punch. The upper core rod and the lower core rod each may have a generally flat external surface section. A metal powder is compacted in the compaction die by the combined action of the upper and lower punches and the upper and lower core rods.Type: GrantFiled: September 4, 2007Date of Patent: April 26, 2011Assignee: Burgess-Norton Mfg. Co., Inc.Inventors: John Engquist, Bret E. Viant, Mark R. Haas, Kurt Kujawski, Matthew D. Bowman, Kevin J. Skibinski
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Publication number: 20110073377Abstract: Earth-boring drill bits include a bit body including a blockage-resistant internal fluid passageway. The blockage-resistant internal fluid passageway includes at least one internal fluid passageway formed in the bit body and a cuttings filtering feature formed in the at least one internal fluid passageway configured to prevent at least some cuttings from flowing through the at least one internal fluid passageway. In one embodiment, the cuttings filtering feature includes at least one lateral member extending transversely across the at least one internal fluid passageway. In another embodiment, the cuttings filtering feature includes forming a central portion of the at least one internal fluid passageway with a width along a lateral axis thereof less than an average width of a fluid path extending through a nozzle disposed at least partially within the at least one internal fluid passageway. Methods of forming the blockage-resistant internal fluid passageway are also disclosed.Type: ApplicationFiled: September 30, 2009Publication date: March 31, 2011Applicant: BAKER HUGHES INCORPORATEDInventors: David L. Rickabaugh, Rudolf Carl Pessier, Mark E. Anderson, William A. Moss, Redd H. Smith
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Publication number: 20110070119Abstract: A method for preparing an article is disclosed. The method comprises compacting a mixture of a first pre-alloyed powder and a lubricant to thereby form a green part having a green strength sufficient to permit mechanical handling; applying a slurry to a surface of the green part to thereby form a slurry coated green part, wherein the slurry comprises a second pre-alloyed powder, a binder, and a solvent; and heating the coated green part to a temperature below a solidus temperature of the first pre-alloyed powder and between a solidus temperature and a liquidus temperature of the second pre-alloyed powder to thereby solid state sinter the first pre-alloyed powder into a sintered core and to liquid state sinter the second pre-alloyed powder into a continuous alloy coating over the sintered core.Type: ApplicationFiled: May 28, 2009Publication date: March 24, 2011Applicant: DELORO STELLITE HOLDINGS CORPORATIONInventors: Abdelhakim Belhadjhamida, Donald Williams, John Davies
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Patent number: 7897102Abstract: A powder metallurgy method for making valve guides for use in internal combustion engines advantageously utilizes uniaxial side pressing to form compacts. Such compacts are subsequently sintered, formed into a cylindrical shape, and then hollowed to form a valve guide. The valve guides exhibit improved uniformity and density and hardness from end to end of the valve guide when contrasted to powder metal valve guides formed with uniaxial end pressing.Type: GrantFiled: August 27, 2004Date of Patent: March 1, 2011Assignee: Helio Precision Products, Inc.Inventors: Howard M. Livingston, C. Bruce Blackwell
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Publication number: 20110044836Abstract: A friction stir tool has an axis of rotation and a welding tip that is made of powdered metal material.Type: ApplicationFiled: November 1, 2010Publication date: February 24, 2011Inventor: Denis Christopherson, JR.