Silicon Containing Patents (Class 420/544)
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Publication number: 20070297936Abstract: The aluminum alloy is an aluminum-magnesium-scandium-zirconium alloy having a long term corrosion resistance combined with high strength as compared to standard AA 5052 alloy, and is suitable for use in marine and salt water environments with a minimum of corrosion. The aluminum alloy contains about 2.2-3.0 wt. % magnesium, about 0.1-0.97 wt. % scandium, and about 0.14-0.9 wt. % zirconium. The alloy may also contain about 0.1-0.4% wt. % iron, 0.001-0.2 wt. % chromium, 0.02-0.94 wt. % titanium, and silicon, copper, zinc and manganese up to about 0.20 wt. %, 0.1 wt. %, 0.1 wt. %, and 0.01 wt. %, respectively, either as additives intentionally added during processing or as impurities, the remainder being aluminum.Type: ApplicationFiled: June 23, 2006Publication date: December 27, 2007Inventors: Zaki Ahmad, Anwar Ul-Hamid, B.J. Abdul-Aleem
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Patent number: 6929706Abstract: An aluminum-magnesium alloy for casting operations consisting of, in weight percent, Mg 2.7-6.0, Mn 0.4-1.4, Zn 0.10-1.5, Zr 0.3 max., V 0.3 max., Sc 0.3 max., Ti 0.2 max., Fe 1.0 max., Si 1.4 max., balance aluminum and inevitable impurities. The casting alloy is particularly suitable for application in die-casting operations. Further the invention relates to the method of use of the casting alloy for die-casting automotive components.Type: GrantFiled: February 12, 2004Date of Patent: August 16, 2005Assignees: Corus Aluminium Voerde GmbH, Corus Aluminium Walzprodukte GmbHInventors: Martinus Godefridus Johannes Spanjers, Desikan Sampath, Alfred Johann Peter Haszler
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Patent number: 6808864Abstract: Disclosed is a support for a lithographic printing plate obtained by subjecting an aluminum plate to a graining treatment and an anodizing treatment, the support comprising at least any one of Mn in a range from 0.1 to 1.5 wt % and Mg in a range from 0.1 to 1.5 wt %; Fe of 0 to 1 wt %; Si of 0 to 0.5 wt %; Cu of 0 to 0.2 wt %; at least one kind of element out of the elements listed in items (a) to (d) below in a range of content affixed thereto, (a) 1 to 100 ppm each of one or more kinds of elements selected from a group consisting of Li, Be, Sc, Mo, Ag, Ge, Ce, Nd, Dy and Au, (b) 0.Type: GrantFiled: September 10, 2002Date of Patent: October 26, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Hirokazu Sawada, Akio Uesugi
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Patent number: 6783869Abstract: The invention relates to an aluminium alloy for an anti-friction element containing respectively, as a % by weight, 4.2% to 4.8% Zn, 3.0% to 7.0% Si, 0.8% to 1.2% Cu, 0.7% to 1.3% Pb, 0.12% to 0.18% Mg, 0% to 0.3% Mn and 0% to 0.2% Ni. Also incorporated, based on % by weight, are 0.05% to 0.1% Zr, 0% to 0.05% Ti, 0% to 0.4% Fe, 0% to 0.2% Sn. The rest is formed by Al with the usual incidental impurities depending on the melt.Type: GrantFiled: November 7, 2002Date of Patent: August 31, 2004Assignee: MIBA Gleitlager AktiengesellschaftInventors: Johannes Humer, Herbert Kirsch, Markus Manner, Robert Mergen
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Patent number: 6773664Abstract: An aluminum-magnesium alloy for casting operations consisting of, in weight percent, Mg 2.7-6.0, Mn 0.4-1.4, Zn 0.10-1.5, Zr 0.3 max., V 0.3 max., Sc 0.3 max., Ti 0.2 max., Fe 1.0 max., Si 1.4 max., balance aluminum and inevitable impurities. The casting alloy is particularly suitable for application in die-casting operations. Further the invention relates to the method of use of the casting alloy for die-casting automotive components.Type: GrantFiled: March 26, 2001Date of Patent: August 10, 2004Assignees: Corus Aluminium Voerde GmbH, Corus Aluminium Walzprodukte GmbHInventors: Martinus Godefridus Johannes Spanjers, Desikan Sampath, Alfred Johann Peter Haszler
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Patent number: 6773666Abstract: An improved Al—Si—Mg—Mn casting alloy that consists essentially of: about 6.0-9.0 wt. % silicon, about 0.2-0.8 wt. % magnesium, about 0.1-1.2 wt. % manganese, less than about 0.15 wt. % iron, less than about 0.3 wt. % titanium and less than about 0.04 wt. % strontium, the balance aluminum. Preferrably, this casting alloy is substantially copper-free, chromium-free and beryllium-free.Type: GrantFiled: February 27, 2003Date of Patent: August 10, 2004Assignee: Alcoa Inc.Inventors: Jen C. Lin, Que-Tsang Fang, Carl E. Garesche, Holger Haddenhorst
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Publication number: 20040151615Abstract: There is disclosed a cast-forged product of an aluminum alloy consisting essentially of: 0.6 to 1.8 wt % of silicon; 0.6 to 1.8 wt % of magnesium; 0.8 wt % or less of copper; 0.2 to 1.0 wt % of manganese; 0.25 wt % or less of chromium; 0.0 to 0.15 wt % of titanium; and unavoidably contained impurities. When the product is used as various parts for automobiles formed of aluminum, such as suspension parts, frames, and parts for engines, the product is more superior in mechanical properties such as a tensile strength, proof stress, and elongation, and can be manufactured with a low cost.Type: ApplicationFiled: October 1, 2003Publication date: August 5, 2004Applicants: Asahi Tec Corporation, Hoei Industries Co., Ltd.Inventors: Kohji Kotani, Masatoshi Watanabe, Daisuke Machino
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Publication number: 20040118492Abstract: The invention refers to an aluminium alloy, a clad or unclad material for brazed products containing said alloy as a core, as well as a method of producing materials to be used in brazed products from said alloy. The material is suitable for controlled atmosphere brazing (CAB) using fluxes that manage higher Mg levels in the materials. The alloy is intended as a fin-stock material for brazed products, such as heat exchangers.Type: ApplicationFiled: October 14, 2003Publication date: June 24, 2004Inventor: Torkel Stenqvist
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Patent number: 6695935Abstract: Aluminum-magnesium alloy product for welded mechanical construction, having the following composition, in weight percent: Mg 3.5-6.0, Mn 0.4-1.2, Zn 0.4-1.5, Zr 0.25 max., Cr 0.3 max., Ti 0.2 max., Fe 0.5 max., Si 0.5 max., Cu 0.4 max.; one or more selected from the group: Bi 0.005-0.1, Pb 0.005-0.1, Sn 0.01-0.1, Ag 0.01-0.5, Sc 0.01-0.5, Li 0.01-0.5, V 0.01-0.3, Ce 0.01-0.3, Y 0.01-0.3, and Ni 0.01-0.3; others (each) 0.05 max., (total) 0.15 max.; and balance aluminum.Type: GrantFiled: February 15, 2002Date of Patent: February 24, 2004Assignee: Corus Aluminium Walzprodukte GmbHInventors: Alfred Johann Peter Haszler, Desikan Sampath
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Patent number: 6682609Abstract: A hydrogen-absorbing alloy which is excellent in stability in an aqueous solution and in mechanical pulverizability is disclosed. This hydrogen-absorbing alloy contains an alloy represented by the following general formula (I): Mg2M1y (I) wherein M1 is at least one element selected (excluding Mg, elements which are capable of causing an exothermic reaction with hydrogen, Al and B) from elements which are incapable of causing an exothermic reaction with hydrogen; and y is defined as 1<y≦1.5.Type: GrantFiled: March 17, 1999Date of Patent: January 27, 2004Assignee: Kabushiki Kaisha ToshibaInventors: Shinji Tsuruta, Tatsuoki Kohno, Motoya Kanda
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Patent number: 6676899Abstract: A chemical composition of alloys, in particular naturally hard semifinished-material alloys, which are intended to be used in this form as material for semifinished materials. A naturally hard aluminum alloy for semifinished materials which, in addition to magnesium, titanium, beryllium, zirconium, scandium, and cerium, is also made of manganese, copper, zinc, and an element group containing iron and silicon, the ratio of iron to silicon being in the range of 1 to 5.Type: GrantFiled: November 12, 2002Date of Patent: January 13, 2004Assignee: Eads Deutschland GmbHInventors: Valentin Georgijevich Davydov, Yuri Filatov, Blanka Lenczowski, Viktor Yelagin, Valeri Zakarov
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Publication number: 20030185701Abstract: The present invention relates to an improved process for the production of high strength and high wear resistant Al—Fe—V—Si alloys. The present invention comprises modifying/blocking primary intermetallic phases as well as interdendritic silicide phases by treating the melt with elemental magnesium or magnesium bearing master alloys to get a structure containing uniform distribution of intermetallic phases. The uniform distribution of primary and interdendritic phases are obtained with addition of magnesium or magnesium bearing master alloys because morphology of the interface changes resulting in the creation of more nuclei. It also breaks dendrite of the primary particles leading to structural change and fine particles. The present invention is useful for the industries engaged in production of high strength wear resistant aluminium alloys which are widely used in aerospace, transport and other engineering sectors.Type: ApplicationFiled: April 1, 2002Publication date: October 2, 2003Inventors: Kanai L. Sahoo, Sivaramakrishnan S. Chittur
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Patent number: 6623693Abstract: An aluminum alloy composition consists essentially of controlled amounts of iron, silicon, copper, manganese, magnesium, titanium, zinc, zirconium, and free machining elements with the balance being aluminum and incidental impurities. The alloy provides improvements in combined strength, corrosion resistance, machinability, and brazeability. A component or article made from the aluminum alloy can be machined to the right configuration and can be brazed to another component to form a high quality brazed joint. In addition, the article can withstand corrosive environments and has the necessary mechanical properties to interface with other components. The alloy is adapted for particular use as a component in a heat exchanger assembly, such as a connector block having one or more machined surfaces or passageways.Type: GrantFiled: November 17, 2000Date of Patent: September 23, 2003Assignee: Reynolds Metals CompanyInventor: Subhahish Sircar
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Patent number: 6623570Abstract: A casting alloy of the AlMgSi type comprises Magnesium 3.0 to 7.0 wt. % Silicon 1.7 to 3.0 wt. % Manganese 0.2 to 0.48 wt. % Iron 0.15 to 0.35 wt. % Titanium as desired max. 0.2 wt. % Ni 0.1 to 0.4 wt % and aluminum as the rest along with production related impurities, individually at most 0.02 wt. %, in total at most 0.2 wt. %, with the further provision that the magnesium and silicon are present in the alloy in a Mg:Si weight ratio of 1.7:1, corresponding to the composition of the quasi binary eutectic made up of the solid state phases Al and Mg2Si, whereby the deviation from the exact composition of the quasi-binary eutectic amounts to at most −0.5 to +0.3 wt. % for magnesium and −0.3 to +0.5 wt. % for silicon the finely dispersed precipitates of the intermetallic phase Mg2Si results in high ductility.Type: GrantFiled: February 8, 2002Date of Patent: September 23, 2003Assignee: Alcan Technology & Management Ltd.Inventors: Reinhard Winkler, Gunter Höllrigl, Jürgen Wuest, Klaus Währisch
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Publication number: 20030164208Abstract: In the production of an aluminum alloy plate for an automobile body, a molten alloy having an aluminum alloy composition of 3.00% by weight≦Mg≦3.50% by weight, 0.20% by weight≦Fe≦0.60% by weight, 0.10% by weight≦Si≦0.15% by weight, 0.01% by weight≦Ti≦0.05% by weight, Mn≦0.05% by weight and the balance of aluminum containing inevitable impurities is subjected to a liquid metal rolling to provide a plate material; the plate material is subjected to a cold rolling to provide a cold-rolled plate; and the cold-rolled plate is subjected to an annealing treatment at a temperature T set in a range of 340° C.≦T≦400° C. and for a period of time t set in a range of 9 hours≦t≦11 hours.Type: ApplicationFiled: January 30, 2003Publication date: September 4, 2003Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Kunihiro Yasunaga, Hitoshi Kazama
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Patent number: 6607616Abstract: The invention relates to an aluminum casting alloy and to cast products made thereof consisting of, in weight percent: Mg 1.0-2.6, Si 0.5-2.0, Mn 0.9-1.4, Fe<0.50, Cu<1.0, Zn<0.30, Ti<0.20, Be<0.003, balance aluminum and inevitable impurities.Type: GrantFiled: June 15, 2001Date of Patent: August 19, 2003Assignee: Corus Aluminium Voerde GmbHInventors: Martinus Godefridus Johannes Spanjers, Timothy John Hurd
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Publication number: 20030143101Abstract: An aluminum alloy for die casting, contains, in terms of mass percentage: Si in the range of 1.0˜3.5 %; Mg in the range of 2.5˜4.5 %; Mn in the range of 0.3˜1.5%; Fe in the range equal to or less than 0.15%; Ti in the range of equal to or less than 0.20%; and the balance of aluminum and inevitable impurities. A die cast product having good strength and elongation in a high strain rate region is produced from the aluminum alloy without the need for solution heat treatment.Type: ApplicationFiled: March 17, 2003Publication date: July 31, 2003Applicant: NISSAN MOTOR CO., LTDInventors: Sanji Kitaoka, Yukio Kuramasu, Syuichi Asakuno, Kenji Tsushima, Masahiko Shioda, Hiroshi Kambe, Shinichiro Sumi, Takaaki Ikari
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Patent number: 6592687Abstract: A cast article from an aluminum alloy, which has improved mechanical properties at elevated temperatures, has the following composition in weight percent: Silicon 14-25.0, Copper 5.5-8.0, Iron 0.05-1.2, Magnesium 0.5-1.5, Nickel 0.05-0.9, Manganese 0.05-1.0, Titanium 0.05-1.2, Zirconium 0.05-1.2, Vanadium 0.05-1.2, Zinc 0.05-0.9, Phosphorus 0.001-0.1, and the balance is Aluminum, wherein the silicon-to-magnesium ratio is 10-25, and the copper-to-magnesium ratio is 4-15. The aluminum alloy contains a simultaneous dispersion of three types of Al3X compound particles (X═Ti, V, Zr) having a L12 crystal structure, and their lattice parameters are coherent to the aluminum matrix lattice. A process for producing this cast article is also disclosed, as well as a metal matrix composite, which includes the aluminum alloy serving as a matrix and containing up to about 60% by volume of a secondary filler material.Type: GrantFiled: July 11, 2002Date of Patent: July 15, 2003Assignee: The United States of America as represented by the National Aeronautics and Space AdministrationInventors: Jonathan A. Lee, Po-Shou Chen
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Patent number: 6544358Abstract: An aluminium alloy in the AA5XXX series has the composition: Si 0.10-0.25 %; Fe 0.18-0.30 %; Cu up to 0.5 %; Mn 0.4-0.7 %; Mg 3.0-3.5%; Cr up to 0.2%; and Ti up to 0.1%. Rolled and annealed sheet of the alloy is readily formed into shaped components for use in vehicles which components have good strength and resistance to stress corrosion cracking.Type: GrantFiled: July 8, 1999Date of Patent: April 8, 2003Assignee: Alcan International LimitedInventors: Alan Robert Carr, Kevin Michael Gatenby, Michael Bull
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Patent number: 6494137Abstract: A support for a lithographic printing plate obtained by performing surface graining and anodizing of an aluminum alloy plate, wherein the foregoing aluminum alloy plate contains specific contents of Fe, Si, Cu, Ti, Zn and Mg, with the balance being Al and incidental impurities. The presensitized plate obtained from this support for a lithographic printing plate is excellent in press life and in resistance to dot ink stain when processed into a lithographic printing plate. Preferably, the support for a lithographic printing plate, with regard to the surface of the support, has a center line average roughness Ra in the range of 0.2-0.6 &mgr;m, a maximum height Rmax in the range of 3.0-6.0 &mgr;m, a ten-point mean roughness Rz in the range of 2.0-5.5 &mgr;m, a center line peak height Rp in the range of 1.0-3.0 &mgr;m, a center line valley depth Rv in the range of 2.0-3.5 &mgr;m, a mean spacing Sm in the range of 40-70 &mgr;m, an average inclination &Dgr;a in the range of 6.0-12.Type: GrantFiled: July 3, 2001Date of Patent: December 17, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Hirokazu Sawada, Akio Uesugi
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Publication number: 20020155022Abstract: A casting alloy of the AlMgSi type comprises 1 Magnesium 3.0 to 7.0 wt. % Silicon 1.7 to 3.0 wt. % Manganese 0.2 to 0.48 wt. % Iron 0.15 to 0.35 wt. % Titanium as desired max. 0.2 wt. % Ni 0.1 to 0.Type: ApplicationFiled: February 8, 2002Publication date: October 24, 2002Inventors: Reinhard Winkler, Gunter Hollrigl, Jurgen Wuest, Klaus Wahrisch
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Patent number: 6447982Abstract: A litho strip for use as an offset printing plate is described which has a composition of 0.05-0.25% Si, 0.30-0.40% Fe, 0.10-0.30% Mg, max. 0.05% Mn, and max. 0.04% Cu. The strip is produced from a continuous cast ingot of the above composition which is hot rolled to a thickness of up to 2-7 mm. The residual resistance ratio of the hot rolled strip is RR=10-20. The cold rolling is carried out with or without intermediate annealing, wherein the degree of rolling reduction after intermediate annealing is >60%. The further processing up to the EC roughening takes place with the microstructure adjusted in the rolling process at <100° C. The litho strip is characterized by a high thermal stability, a good roughening behavior in the EC processes, and a high reverse bending fatigue strength perpendicular to the rolling direction.Type: GrantFiled: June 30, 2000Date of Patent: September 10, 2002Assignee: VAW Aluminium AGInventors: Wolfgang von Asten, Bernhard Kernig, Barbara Grzemba
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Patent number: 6440583Abstract: Disclosed is an Al alloy for a welded construction having excellent welding characteristics, which Al alloy comprises 1.5 to 5 wt % of Si (hereinafter, wt % is referred to as %), 0.2 to 1.5% of Mg, 0.2 to 1.5% of Zn, 0.2 to 2% of Cu, 0.1 to 1.5% of Fe, and at least one member selected from the group consisting of 0.01 to 1.0% of Mn, 0.01 to 0.2% of Cr, 0.01 to 0.2% of Ti, 0.01 to 0.2% of Zr, and 0.01 to 0.2% of V, with the balance being Al and inevitable impurities. Also disclosed is a welded joint having this Al alloy base metal welded with an Al—Mg- or Al—Si-series filler metal.Type: GrantFiled: October 26, 2000Date of Patent: August 27, 2002Assignees: The Furukawa Electric Co., Ltd., Honda Giken Kogyo Kabushiki KaishaInventors: Seizo Ueno, Yoichiro Bekki, Noboru Hayashi
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Patent number: 6440359Abstract: An alloy of composition in wt. % (see table (I)) and incidental impurities up to 0.05 each 0.15 total, balance A1. The alloy can be extruded at high speed to provide extruded sections which meet T5 or T6 strength requirements.Type: GrantFiled: September 22, 1999Date of Patent: August 27, 2002Assignee: Alcan International LimitedInventors: Nicholas Charles Parson, Jeffrey David Hankin, Kevin Paul Hicklin
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Publication number: 20020088512Abstract: An aluminum alloy for die casting, contains, in terms of mass percentage: Si in the range of 1.0˜3.5%; Mg in the range of 2.5˜4.5%; Mn in the range of 0.3˜1.5%; Fe in the range equal to or less than 0.15%; Ti in the range of equal to or less than 0.20%; and the balance of aluminum and inevitable impurities. A die cast product having good strength and elongation in a high strain rate region is produced from the aluminum alloy without the need for solution heat treatment.Type: ApplicationFiled: October 22, 2001Publication date: July 11, 2002Applicant: Nissan Motor Company, LtdInventors: Sanji Kitaoka, Yukio Kuramasu, Syuichi Asakuno, Kenji Tsushima, Masahiko Shioda, Hiroshi Kambe, Shinichiro Sumi, Takaaki Ikari
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Patent number: 6364970Abstract: The diecasting alloy based on aluminium-silicon contains 9.5 to 11.5 w. % silicon 0.1 to 0.5 w. % magnesium 0.5 to 0.8 w. % manganese max 0.15 w. % iron max 0.03 w. % copper max 0.10 w. % zinc max 0.15 w. % titanium with the remainder aluminium and for permanent refinement 30 to 300 ppm strontium.Type: GrantFiled: November 21, 1994Date of Patent: April 2, 2002Assignee: Aluminium Rheinfelden GmbHInventors: Ulrich Hielscher, Horst Sternau, Hubert Koch
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Patent number: 6364969Abstract: A 6XXX series aluminium alloy containing Mg and Si is disclosed. The 6XXX series aluminium alloy is characterized in that the Mg and Si that is available to form MgSi precipitates is present in amounts such that the ratio of Mg:Si, on an atomic weight basis, is between 0.8:1 and 1.2:1.Type: GrantFiled: October 12, 1999Date of Patent: April 2, 2002Inventor: Malcolm James Couper
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Patent number: 6361741Abstract: This invention relates to an aluminum alloy with B-rated or better machineability, said alloy being suitable for using as brazing in the Nocolock® process. The alloy consists essentially of: about 0.5-0.8 wt. % silicon; about 0.4-0.6 wt. % magnesium; about 0.4-0.72 wt. % tin; up to about 0.5 wt. % iron; up to about 0.3 wt. % copper; up to about 0.35 wt. % manganese; up to about 0.15 wt. % chromium; and up to about 0.2 wt. % zinc; the balance aluminum and incidental elements and impurities. This product is preferentially processed into one or more of the following tempers: T1, T5, T6, T651, T6510, T6511, T8, T851, and T9.Type: GrantFiled: January 31, 2000Date of Patent: March 26, 2002Assignee: Alcoa Inc.Inventors: Thomas J. Klemp, Richard A. Jeniski, Jr., David W. Hohman
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Publication number: 20020015658Abstract: An aluminum-copper-zinc alloy having ancillary additions of lithium. The alloy composition includes from about 5 to 13 wt % zinc and from about 0.01 to 1.0 wt % lithium.Type: ApplicationFiled: June 3, 1999Publication date: February 7, 2002Inventors: ROBERTO J. RIOJA, GARY H. BRAY, JAMES T. STALEY, DIANA K. DENZER
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Publication number: 20020006352Abstract: An aluminum-magnesium alloy for casting operations consisting of, in weight percent, Mg 2.7-6.0, Mn 0.4-1.4, Zn 0.10-1.5, Zr 0.3 max., V 0.3 max., Sc 0.3 max., Ti 0.2 max., Fe 1.0 max., Si 1.4 max., balance aluminum and inevitable impurities. The casting alloy is particularly suitable for application in die-casting operations. Further the invention relates to the method of use of the casting alloy for die-casting automotive components.Type: ApplicationFiled: March 26, 2001Publication date: January 17, 2002Inventors: Martinus Godefridus Johannes Spanjers, Desikan Sampath, Alfred Johann Peter Haszler
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Patent number: 6334978Abstract: The present invention is directed to the additions of alkaline earth metals, in particular strontium and optionally combinations with other metals, to aluminum and aluminum alloys to improve the appearance of, eliminate surface imperfections, and reduce the surface oxidation of the as-cast ingots.Type: GrantFiled: July 13, 1999Date of Patent: January 1, 2002Assignee: Alcoa, Inc.Inventors: David H. DeYoung, Mark J. Dunlay
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Patent number: 6309481Abstract: An aluminium casting alloy contains: 2.0 to 3.5 w. % magnesium 0.15 to 0.35 w. % silicon 0.20 to 1.2 w. % manganese max. 0.40 w. % iron max. 0.10 w. % copper max. 0.05 w. % chromium max. 0.10 w. % zinc max. 0.003 w. % beryllium max. 0.20 w. % titanium max. 0.60 w. % cobalt max. 0.80 w. % cerium and aluminium as the remainder with further impurities individually max. 0.02 w. %, total max. 0.2 w. %. The aluminium alloy is particularly suitable for diecasting, thixocasting and thixoforging. A particular application is diecasting for components with high requirements for mechanical properties, as these are present even in the cast state and thus no further heat treatment is required.Type: GrantFiled: September 30, 1998Date of Patent: October 30, 2001Assignee: Aluminium Rheinfelden, GmbHInventors: Hubert Koch, Horst Schramm
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Publication number: 20010032688Abstract: A corrosion resistant aluminum alloy has controlled amounts of iron, manganese, chromium, and titanium along with levels of copper, silicon, nickel, and no more than impurity levels of zinc. The alloy chemistry is tailored such that the electrolytic potential of the grain boundaries matches the alloy matrix material to reduce intergranular corrosion. The alloy is particularly suited for the manufacture of tubing for heat exchangers using extrusion and brazing techniques.Type: ApplicationFiled: April 23, 2001Publication date: October 25, 2001Inventor: Baolute Ren
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Patent number: 6258465Abstract: Provided is an energy absorbing member which makes it possible to induce contraction and deformation into a form of bellows, with Euler's buckle being restrained. An energy absorbing member comprises a hollow extrusion which is made of an aluminum alloy and has an outer portion and an inner rib connected to the outer portion, and the radius of the corner where the rib and the outer portion are connected to each other is not more than a half of the thickness of the rib. A similar energy absorbing member has plural inner ribs which are connected to the outer portion and cross each other, and the radius of the corner where the ribs cross each other is 1 mm or less.Type: GrantFiled: July 8, 1998Date of Patent: July 10, 2001Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Takashi Oka, Hiroyuki Yamashita, Masakazu Hirano
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Patent number: 6132531Abstract: Alloy and cast alloy product ideally suited for use as a component in a vehicle frame or subframe, i.e., body-in-white, comprising an alloy consisting of about 2.80 to 3.60 wt. % magnesium, less than approximately 0.20 wt. % silicon, approximately 1.10 to 1.40 wt. % manganese, less than approximately 0.2 wt. % iron, less than approximately 0.15 wt. % titanium, about 0.0005 to 0.0015 beryllium, the balance substantially aluminum and incidental elements and impurities. The aluminum/magnesium alloy is typically solidified into ingot derived working stock by die casting into a shape suitable for remelt for die casting, which shape is typically an ingot billet. Excellent mechanical properties are obtained from a cast product that is not subjected to heat treating operations subsequent to casting.Type: GrantFiled: February 11, 1999Date of Patent: October 17, 2000Assignee: Aluminum Company of AmericaInventors: Que Tsang Fang, Jen C. Lin, Manfred G. Sindel
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Patent number: 6063210Abstract: A superplastically formable, aluminum alloy product which consists essentially of about 2-10 wt. % magnesium; at least one dispersoid-forming element selected from the group consisting of: up to about 1.6 wt. % manganese, up to about 0.2 wt. % zirconium, and up to about 0.3 w. % chromium; at least one nucleation-enhancing element for recrystallization selected from: up to about 1.0 wt. % silicon, up to about 1.5 wt. % copper, and combinations thereof. Said alloy product has greater than about 300% elongation at a strain rate of at least about 0.0003/sec and a superplastic forming temperature between about 1000-1100.degree. F. due, in part, to the preferred thermomechanical processing steps subsequently applied thereto. A related method of manufacture is also disclosed herein.Type: GrantFiled: August 28, 1997Date of Patent: May 16, 2000Assignee: Aluminum Company of AmericaInventors: Dhruba J. Chakrabarti, Roger D. Doherty
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Patent number: 5993572Abstract: In a thixocasting process, the following steps are used: a step of subjecting, to a heating treatment, an Al-Si based alloy material having a hypo eutectic crystal composition and a characteristic that a first angled endothermic section appearing due to the melting of a eutectic crystal and a second angled endothermic section appearing due to the melting of a component having a melting point higher than a eutectic point exist in a differential calorimetric curve, thereby preparing a semi-molten Al-Si based alloy material having solid and liquid phases coexisting therein; a step of pouring the semi-molten Al-Si based alloy material into a cavity in a casting mold under pressure; and a step of solidifying the semi-molten Al-Si based alloy material under pressure. When the temperature of a rise-start point in the first angled endothermic section is represented by T.sub.1, and the temperature of a drop-end point the first angled endothermic sections is represented by T.sub.Type: GrantFiled: October 9, 1996Date of Patent: November 30, 1999Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Nobuhiro Saito, Haruo Shiina, Takeyoshi Nakamura, Takeshi Sugawara, Kazuo Kikawa
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Patent number: 5944923Abstract: The invention provides an aluminum alloy sheet that has excellent formability, high coat-baking hardenability, and ensures a proof stress of 200 MPa or more after the coat-baking stage, and that gives favorable product surface quality after the forming stage and excellent corrosion resistance, and that is particularly suitable for external automobile body plates. The aluminum alloy sheet comprises: 0.9 to 1.3 wt. % of Si, 0.4 to 0.6 wt. % of Mg, 0.05 to 0.15 wt. % of Mn, 0.01 to 0.1 wt. % of Ti, with the remainder comprising Al and inevitable impurities, while limiting Fe as an impurity to 0.2 wt. % or less and Cu as an impurity to 0.1 wt. % or less; a coating film of a lubricant composition containing a water-dispersible polyurethane resin and a natural wax on the aluminum alloy sheet.Type: GrantFiled: January 10, 1997Date of Patent: August 31, 1999Assignees: Honda Giken Kogyo Kabushiki Kaisha, Sumitomo Light Metal Industries, Ltd.Inventors: Noboru Hayashi, Kunihiro Yasunaga, Hideo Yoshida, Hidetoshi Uchida, Hideo Itoh
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Patent number: 5938867Abstract: A method of producing an aluminum product comprising providing stock including an aluminum alloy comprising about 4.0 to 4.4 wt. % copper, about 1.25 to 1.5 wt. % magnesium, about 0.35 to 0.5 wt. % manganese, not more than 0.12 wt. % silicon, not more than 0.08 wt. % iron, not more than 0.06 wt. % titanium, the remainder substantially aluminum, incidental elements and impurities; hot working the stock; annealing at 725-875.degree. F.; cold rolling; solution heat treating; cooling; holding for at least 12 hours at room temperature; and cold working from about 4% to 7% thereby producing a product having increased strength and toughness properties.Type: GrantFiled: March 25, 1997Date of Patent: August 17, 1999Assignee: Kaiser Aluminum & Chemical CorporationInventors: Ralph C. Dorward, Steven D. Kennedy
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Patent number: 5925313Abstract: There is provided an Al base alloy containing boron which is superior in mechanical properties such as strength, ductility or workability and the like and has a neutron absorbing capacity and an ability to recycle. This is an Al base alloy containing boron with Mg: 2 to 8% (massed %, similarly applied hereinafter) and B: 0.5 to 1.5% and satisfying a relation of .sup.10 B/(.sup.10 B+.sup.11 B).gtoreq.95%, and a rate of AlB.sub.2 in all boron compounds is 80% or more by a volumetric rate.Type: GrantFiled: April 22, 1996Date of Patent: July 20, 1999Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Katsura Kajihara, Haruo Kakunai, Yuichi Seki, Tadahiko Yamashita, Masahiro Yanagawa
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Patent number: 5908518Abstract: The invention relates to a rolled or extruded AlMgMn aluminum alloy product for welded mechanical construction with the composition (% by weight): 3.0<Mg<65, 0.2<Mn<1.0, Fe<0.8, 0.05<Si<0.6, Zn<1.3, possibly Cr<0.15 and/or one or more of the elements Cu, Ti, Ag, Zr, V at a content of<0.30 each, other elements and inevitable impurities <0.05 each and <0.15 in total, in which the number of Mg.sub.2 Si particles between 0.5 .mu.m and 5 .mu.m, in size is between 150 and 2,000 per mm.sup.2, and preferably between 300 and 1,500 per mm.sup.2. The products according to the invention have good corrosion resistance and are used for structural applications such as for example, boats, offshore structures or industrial vehicles.Type: GrantFiled: July 25, 1997Date of Patent: June 1, 1999Assignee: Pechiney RhenaluInventors: Jean-Luc Hoffmann, Martin Peter Schmidt
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Patent number: 5906689Abstract: An aluminum-based alloy composition having improved corrosion resistance and extrudability consists essentially of, in weight percent, an amount of copper up to about 0.03%, between about 0.1 and 0.5% manganese, between about 0.03 and 0.30% titanium, between about 0.06 and 1.0% zinc, an amount of iron up to about 0.50%, between about 0.05 and 0.12% Si, less than 0.01% manganese, less than 0.01% nickel, up to 0.5% chromium with the balance aluminum and incidental impurities. A process of making an aluminum alloy article having high corrosion resistance also is provided.Type: GrantFiled: June 6, 1996Date of Patent: May 25, 1999Assignee: Reynolds Metals CompanyInventor: Subhasish Sircar
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Patent number: 5837070Abstract: The invention relates to an aluminum alloy sheet heat treated by natural aging, quenching and possibly tempering so as to obtain a yield strength greater than 320 MPa, for use in mechanical, naval, aircraft, or spacecraft construction, with a composition (by weight) of:Si: 6.5 to 11%Mg: 0.5 to 1.0%Cu: <0.8%Fe: <0.Type: GrantFiled: January 22, 1996Date of Patent: November 17, 1998Assignee: Pechiney RhenaluInventors: Pierre Sainfort, Denis Bechet
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Patent number: 5766546Abstract: An alloy suitable for manufacturing components out of a hollow body by high internal pressure forming contains, in wt. %,______________________________________ Silicon 0.3 to 1.6 Magnesium 0.3 to 1.3 Iron max. 0.5 Copper max. 0.9 Manganese max. 0.5 Vanadium 0.05 to 0.3 Cobalt max. 0.3 Chromium max. 0.3 Nickel max.0.8 Zirconium max. 0.3 ______________________________________and other alloying elements, individually at most 0.05, in total at most 0.15, the remainder aluminum.Type: GrantFiled: March 13, 1997Date of Patent: June 16, 1998Assignee: Alusuisse Technology & Management Ltd.Inventor: Pius Schwellinger
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Patent number: 5714018Abstract: A high-strength and high-toughness aluminum-based alloy having a composition represented by the general formula: Al.sub.a Ni.sub.b X.sub.c M.sub.d Q.sub.e, wherein X is at least one element selected from the group consisting of La, Ce, Mm, Ti and Zr; M is at least one element selected from the group consisting of V, Cr, Mn, Fe, Co, Y, Nb, Mo, Hf, Ta and W; Q is at least one element selected from the group consisting of Mg, Si, Cu and Zn; and a, b, c, d and e are, in atomic percentage, 83.ltoreq.a.ltoreq.94,3, 5.ltoreq.b.ltoreq.10, 0.5.ltoreq.c.ltoreq.3, 0.1.ltoreq.d.ltoreq.2, and 0.1.ltoreq.e.ltoreq.2. The aluminum-based alloy has a high strength and an excellent toughness and can maintain the excellent characteristics provided by a quench solidification process even when subjected to thermal influence at the time of working. In addition, it can provide an alloy material having a high specific strength by virtue of minimized amounts of elements having a high specific gravity to be added to the alloy.Type: GrantFiled: October 27, 1992Date of Patent: February 3, 1998Assignee: YKK CorporationInventors: Kazuhiko Kita, Hidenobu Nagahama, Takeshi Terabayashi, Makoto Kawanishi
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Patent number: 5667602Abstract: Alloy and cast alloy product ideally suited for use as a component in a vehicle frame or subframe, i.e., body-in-white, comprising an alloy consisting of about 2.00 to 5.00 wt. % magnesium, up to approximately 0.30 wt. % silicon, approximately 0.20 to 1.60 wt. % manganese, up to approximately 1.00 wt. % iron, and between about 0.10 to 0.30 wt. %, zirconium, the balance substantially aluminum and incidental elements and impurities. The aluminum/magnesium alloy is typically solidified into ingot derived working stock by continuous casting or semi-continuous casting into a shape suitable for remelt for casting, which shape is typically an ingot billet. Excellent mechanical properties are obtained from a cast product that is not subjected to high temperature heat treating operations subsequent to casting.Type: GrantFiled: March 31, 1995Date of Patent: September 16, 1997Assignee: Aluminum Company of AmericaInventors: Que-Tsang Fang, Steven A. Jones, James R. Van Wert, Roger C. Dickenson
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Patent number: 5624632Abstract: An aluminum alloy product for use as a damage tolerant product for aerospace applications, including fuselage skin stock. The aluminum alloy composition contains about 3-7 wt % magnesium, about 0.03-0.2 wt % zirconium, about 0.2-1.2 wt % manganese, up to 0.15 wt % silicon and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of: scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.Type: GrantFiled: January 31, 1995Date of Patent: April 29, 1997Assignee: Aluminum Company of AmericaInventors: Stephen F. Baumann, Edward L. Colvin, Robert W. Hyland, Jr., Jocelyn I. Petit
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Patent number: 5620652Abstract: Applications for aluminum alloys containing scandium with or without zirconium additions. Such modified aluminum alloys possess enhanced properties and exhibit improved processing characteristics, and, as such, are especially suited for use in recreational and athletic structures and components, and in certain aerospace, ground transportation and marine structures and components.Type: GrantFiled: March 27, 1995Date of Patent: April 15, 1997Assignee: Ashurst Technology Corporation (Ireland) LimitedInventors: William T. Tack, Inge L. H. Hansson
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Patent number: 5616189Abstract: An alloy of aluminum containing magnesium, silicon and optionally copper in amounts in percent by weight falling within one of the following ranges:(1) 0.4.ltoreq.Mg.ltoreq.0.8, 0.2.ltoreq.Si.ltoreq.0.5, 0.3.ltoreq.Cu.ltoreq.3.5;(2) 0.8.ltoreq.Mg.ltoreq.1.4, 0.2.ltoreq.Si.ltoreq.0.5, Cu.ltoreq.2.5; and(3) 0.4.ltoreq.Mg.ltoreq.1.0, 0.2.ltoreq.Si.ltoreq.1.4, Cu.ltoreq.2.0; said alloyhaving been formed into a sheet having properties suitable for automotive applications. The alloy may also contain at least one additional element selected from the group consisting of Fe in an amount of 0.4 percent by weight or less, Mn in an amount of 0.4 percent by weight or less, Zn in an amount of 0.3 percent by weight or less and a small amount of at least one other element, such as Cr, Ti, Zr and V.Type: GrantFiled: July 22, 1994Date of Patent: April 1, 1997Assignee: Alcan International LimitedInventors: Iljoon Jin, John Fitzsimon, Michael J. Bull, Pierre H. Marois, Alok K. Gupta, David J. Lloyd
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Patent number: 5597529Abstract: A method for assembling a structure using a filler alloy which includes aluminum and scandium. The method generally includes selecting parts for the structure which are formed from aluminum and/or an aluminum alloy and welding the same together with the aluminum-scandium filler alloy. Similar to the filler alloy, the parts may also include scandium. In one embodiment, the filler alloy and/or the parts further include zirconium. A method for assembling a bicycle frame is also provided. The method includes the steps of forming a first tube, at least a portion of which comprises scandium, forming a second tube, at least a portion of which comprises scandium, and joining the first and second tubes together. A number of aluminum-based alloys are also disclosed which possess enhanced properties. The alloys include scandium in combination with other alloying elements such as, for example, zirconium, copper, magnesium and silicon.Type: GrantFiled: November 7, 1994Date of Patent: January 28, 1997Assignee: Ashurst Technology Corporation (Ireland Limited)Inventor: William T. Tack