Magnesium Containing Patents (Class 420/542)
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Patent number: 6969432Abstract: Rolled or extruded products for welded constructions made of AlMgMn type aluminum alloy. These products contain, in % by weight, 3.0<Mg<5.0, 0.75<Mn<1.0, Fe<0.25, Si<0.25, 0.02<Zn<0.40, optionally one or more of the elements Cr, Cu, Ti, Zr such that Cr<0.25, Cu<0.20, Ti<0.20, Zr<0.20, other elements <0.05 each and <0.15 in total, wherein Mn+2Zn>0.75. In the welded state, these products have improved mechanical strength and resistance to fatigue without unfavorable consequences with regard to toughness and corrosion resistance, and are particularly suitable for naval construction, for industrial vehicles and for bicycle frames made of welded tubes.Type: GrantFiled: June 1, 2004Date of Patent: November 29, 2005Assignee: Pechiney RhenaluInventors: Guy-Michel Raynaud, Jean-Luc Hoffmann, Laurent Cottignies, Georges Pillet
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Patent number: 6866728Abstract: An aluminum alloy with excellent decorativeness, having a composition represented by the general formula AlaMgbMncCrd, wherein b, c, and d are, in mass percentage, 3.0?b?5.6, 0.05?c?1.0, 0.05?d?0.7, c+d>0.2, and a is the balance with unavoidable impurity elements possibly being contained, wherein a matrix of the aluminum alloy is a structure substantially composed of an aluminum solid solution, in which no ?-phase is present. This alloy has excellent decorativeness and decorativeness as well as superior strength, hardness and other such mechanical properties and is useful as materials for slide fastener constituent members, such as their elements, stops, and sliders, and/or in snap buttons, ordinary buttons, and clasps.Type: GrantFiled: February 4, 2004Date of Patent: March 15, 2005Assignee: YKK CorporationInventors: Masataka Kawazoe, Koichi Mikado, Hironobu Wakasa, Futoshi Kozato, Yusuke Meiwa
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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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Publication number: 20040163739Abstract: An aluminum alloy with excellent decorativeness, having a composition represented by the general formula AlaMgbMncCrd, wherein b, c, and d are, in mass percentage, 3.0≦b≦5.6, 0.05≦c≦1.0, 0.05≦d≦0.7, c+d>0.2, and a is the balance with unavoidable impurity elements possibly being contained, wherein a matrix of the aluminum alloy is a structure substantially composed of an aluminum solid solution, in which no &bgr;-phase is present. This alloy has excellent decorativeness and decorativeness as well as superior strength, hardness and other such mechanical properties and is useful as materials for slide fastener constituent members, such as their elements, stops, and sliders, and/or in snap buttons, ordinary buttons, and clasps.Type: ApplicationFiled: February 4, 2004Publication date: August 26, 2004Applicant: YKK CORPORATIONInventors: Masataka Kawazoe, Koichi Mikado, Hironobu Wakasa, Futoshi Kozato, Yusuke Meiwa
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Publication number: 20040155095Abstract: A vacuum brazing method is disclosed for joining aluminum stock materials to each other. The typical cladding material utilized includes aluminum and a melting point lowering agent such as silicon. In addition, the cladding material typically includes magnesium to provide for enhanced wetting of the cladding material into the joint area. It has been found that adjusting the ratio of magnesium to calcium to a level of equal to or greater than 625 to 1 provides greatly enhanced brazed joint formation and reliability of the vacuum brazing method.Type: ApplicationFiled: February 10, 2003Publication date: August 12, 2004Inventors: Karl Paul Kroetsch, Ange D. Koeppen, Charles K. Rottner
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Publication number: 20040109787Abstract: Aluminium-magnesium alloy product for welded mechanical construction, having the following composition, in weight percent:- 1 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.Type: ApplicationFiled: December 3, 2003Publication date: June 10, 2004Inventors: Alfred Johann Peter Haszler, Desikan Sampath
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Publication number: 20040091386Abstract: The use of A1-5083 in a wide range of applications has been an industrial constant for many years. It possesses an excellent balance of properties, including high strength, good weldability, light weight and low cost. One of the commonly perceived drawbacks of the use of 5083 has been concern over susceptibility to stress corrosion cracking (SCC) and subsequent failure while in service. In the present invention, the susceptibility of high-magnesium Al—Mg alloys to SCC was evaluated with an eye toward altering SCC characteristics through compositional changes. These alloy composition changes are comprised of minor additions of Zn and Cu, in levels that are preferably low enough to minimize changes to the favorable bulk properties already inherent to A1-5083. Additionally, in accordance with the present invention, established industrial practices for material processing have been mimicked in order to evaluate the effects on inventive alloys in what would essentially be considered an as-supplied state.Type: ApplicationFiled: July 29, 2003Publication date: May 13, 2004Inventors: Mark C. Carroll, Michael J. Mills, Rudolph G. Buchhiet, Glenn S. Daehn, Bruce Morere, Paul Kobe, H. S. Goodrich
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Patent number: 6733725Abstract: Hydrogen storage compositions which liberate hydrogen readily and which are readily regenerated from a dehydrogenated state formed by liberation of hydrogen are derived from an AlH3-based complex hydride incorporating a member selected from a metalloid such as B, C, Si, P and S, a metal such as Cr, Mn, Fe, Co, Ni, Cu, Mo, Zn, Ga, In and Sn, a metal which forms a stable hydride such as Be, Mg, Ca, Ti, V, Y, Zr and La and a second AlH3-based complex hydride.Type: GrantFiled: March 30, 2001Date of Patent: May 11, 2004Assignee: McGill UniversityInventors: Alicja Zaluska, Leszek Zaluski, John Olaf Strom-Olsen
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Patent number: 6726892Abstract: Various aspects of the present invention provides a nanocrystalline powder suitable for storing hydrogen and a method of producing such a powder. One embodiment provides a nanocrystalline powder containing crystals of an aluminum alloy selected from the group consisting of NaAlx, LiAlx, and MgAl2x, wherein x is between 0.9 and 1.1, desirably 0.95-1.05, preferably about 1. The nanocrystalline powder also desirably includes an intercalated catalyst selected from the group consisting of C, Ti, Pt, Pd, V, Zr, and combinations of two or more of those materials.Type: GrantFiled: February 12, 2002Date of Patent: April 27, 2004Assignee: Quantum Fuel Systems Technologies Worldwide, Inc.Inventor: Ming Au
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Patent number: 6592812Abstract: The present invention provides a heat-resistant and low-electric-resistance aluminum alloy thin film which, even after heat treatment at 300-400° C., exhibits no hillock generation and has a specific resistance of 7 &mgr;&OHgr;·cm or less and also provides a sputtering target material employed for forming such aluminum alloy thin film. The thin film of aluminum alloy of the present invention contains, as components of the alloy, aluminum, carbon, and magnesium, wherein the carbon content and the magnesium content fall within a region defined by the following formulas: X=0.61; X=8; Y=2; and Y=−0.13X+1.3, wherein Y (at %) represents the carbon content by atomic percent and X (at %) represents the magnesium content by atomic percent, and the balance of (X+Y) contains aluminum and unavoidable impurities.Type: GrantFiled: March 26, 2001Date of Patent: July 15, 2003Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Takashi Kubota, Hiroshi Watanabe
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Publication number: 20030129077Abstract: An aluminium base alloy for production of casting alloys with magnesium as the most essential alloy element contains at least 50% scrap metal on primary aluminium base and as the remainder primary aluminium and/or scrap metal on secondary aluminium base of known composition. For production of the aluminium base alloy mainly foodstuff and animal feed packings are used, separated with a pyrolysis process and then the aluminium contained in the packing recycled by melting. The casting alloys produced from the aluminium base alloy are suitable in particular for production of heat-resistant and/or corrosion-resistant parts in the engine area, in particular for production of engine blocks, cylinder heads and oil sumps, by means of sand casting, chilled casting, diecasting, thixocasting or thixoforging.Type: ApplicationFiled: February 27, 2003Publication date: July 10, 2003Inventors: Hubert Koch, Horst Schramm, Peter Krug, Gerhard Ost
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Patent number: 6531004Abstract: Weldable, high-magnesium-content aluminum-magnesium alloy consisting of at least 5-6% w/w magnesium (Mg), 0.05-0.15% w/w zirconium (Zr), 0.05-0.12% w/w manganese (Mn), 0.01-0.2% w/w titanium (Ti), 0.05-0.5% w/w of one or more elements from the scandium group and/or terbium (Tb), wherein at least scandium (Sc) is included, 0.1-0.2% w/w copper (Cu) and/or 0.1-0.4% w/w zinc (Zn), along with aluminum (Al), and unavoidable contamination does not exceed 0.1% w/w silicon (Si).Type: GrantFiled: October 18, 2000Date of Patent: March 11, 2003Assignee: EADS Deutschland GmbHInventors: Blanka Lenczowski, Viktor Yelagin, Rainer Rauh, Valeri Zakharov, Yuri Filatov
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Patent number: 6485583Abstract: A dispersion strengthened mechanically alloyed aluminium based alloy is provided which is prepared by mechanical alloying and is characterized by improved isotropic strength, fracture toughness and corrosion resistance. The alloy system contains by weight 1.2 to 1.6% lithium, 4.0 to 6.0% magnesium, 0.15 to 0.7% carbon, up to 1% oxygen and up to 2.0% in total of one or more grain controlling elements to provide microstructural optimization and control, the balance aluminium save for incidental impurities.Type: GrantFiled: February 13, 2001Date of Patent: November 26, 2002Assignee: Qinetiq LimitedInventors: Wendy J Vine, Andrew D Tarrant
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Patent number: 6485682Abstract: A hardened aluminum alloy, for use in the manufacture of printed circuit boards, having elevated levels of manganese and magnesium and produced as a sheet by a cold rolling process to a specified thickness.Type: GrantFiled: November 6, 2000Date of Patent: November 26, 2002Inventor: Dieter Backhaus
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Patent number: 6444059Abstract: Rolled or extruded products for welded constructions are made of an aluminum-magnesium-manganese type aluminum alloy, consisting essentially of, by weight: 3.0<Mg<5.0 0.5<Mn<1.0 Fe<0.25 Si<0.25 Zn<0.40 Cr<0.25 Cu<0.20 Ti<0.20 Zr<0.20 The product has a volumetric fraction of Mn containing dispersoids grater than 1.2%.Type: GrantFiled: July 25, 1997Date of Patent: September 3, 2002Assignee: Pechiney RhenaluInventors: Guy-Michel Raynaud, Jean-Luc Hoffmann, Laurent Cottignies, Georges Pillet
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Patent number: 6383314Abstract: Aluminum sheets and methods for manufacturing aluminum sheets are provided. The present invention involves control of processing conditions in order to achieve a fine grain size (i.e. ASTM rating of 8.5 or greater) in the material prior to a final cold working operation. Also included within the scope of the present invention are products having a fine grain size which have strength levels above what can be obtained in 5××× alloys.Type: GrantFiled: June 14, 2000Date of Patent: May 7, 2002Assignee: Pechiney Rolled Products LLCInventors: Brady Dunbar, Kenneth Paul Smith
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Patent number: 6352671Abstract: A corrosion-resistant aluminum alloy includes 91%-95.7% by weight aluminum, 0.5%-1% by weight scandium, 3%-5% by weight magnesium, 0.5%-2% by weight nickel, and 0.3%-1% by weight chromium.Type: GrantFiled: November 20, 1999Date of Patent: March 5, 2002Assignees: University of New Orleans Foundation, The Board of Supervisors of Louisiana State University and Agricultural and Mechanical CollegeInventors: Alfred F. Daech, Nikhil K. Sarkar
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Patent number: 6342113Abstract: A high strength Al—Mg alloy in plate or extrusion form having significantly improved strength in both soft and work-hardened tempers as compared with AA5083 is provided. The materials have ductility, pitting, stress and exfoliation corrosion resistances equivalent to those of the AA5083. The materials have improved long term stress and exfoliation corrosion resistances at temperatures above 80° C. The composition is 5-6% Mg, >0.6-1.2% Mn, 0.4-1.5% Zn, 0.05-0.25% Zr, up to 0.3% Cr, up to 0.2% Ti, up to 0.5% each Fe and Si, up to 0.4% each Cu and Ag, remainder Al and inevitable impurities. Manufacture of plate of this alloy is by homogenizing an ingot, hot rolling the ingot into plate in the range 400-530° C., cold rolling the plate with or without inter-annealing, final and optionally inter-annealing of the cold rolled material at temperatures in the range 200-550° C.Type: GrantFiled: February 20, 2001Date of Patent: January 29, 2002Assignee: Corus Aluminium Walzprodukte GmbHInventors: Alfred Johann Peter Haszler, Desikan Sampath
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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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Publication number: 20010050118Abstract: The invention relates to rolled or extruded products for welded constructions made of AlMgMn type aluminium alloy.Type: ApplicationFiled: July 25, 1997Publication date: December 13, 2001Inventors: GUY-MICHEL RAYNAUD, JEAN-LUC HOFFMANN, LAURENT COTTIGNIES, GEORGES PILLET
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Patent number: 6312534Abstract: A high strength cast aluminum-beryllium alloy including magnesium represented by the formula (25-60% Al)+(40-75% Be)+(0.1-1.25% Mg)+(0<X≦5%)+(0<Y≦4%)+(0<Z≦0.75%)=100, wherein: X is at least one element selected from the group consisting of nickel, cobalt and copper; Y is at least one element selected from the group consisting of silicon and silver; and Z is at least one element selected from the group consisting of iron, titanium, zirconium, boron, antimony, strontium, germanium, scandium and the rare earth elements.Type: GrantFiled: November 14, 1997Date of Patent: November 6, 2001Assignee: Brush Wellman, Inc.Inventor: Fritz C. Grensing
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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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Patent number: 6299665Abstract: An alloy feedstock for semi-solid metal injection molding. The alloy feedstock is an alloy material in particulate form and has a heterogeneous structure, a temperature range at 20% of the height of the peak of the main melting reaction greater than 40° C., and having a ratio of the height of the peak of the eutectic reaction to the height of the main melting reaction of less than 0.5.Type: GrantFiled: July 6, 1999Date of Patent: October 9, 2001Assignee: Thixomat, Inc.Inventors: Stephen E. LeBeau, D. Matthew Walukas, Raymond F. Decker
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Publication number: 20010016175Abstract: An aluminum casting alloy contains 1 0.5 to 2.0 w. % magnesium max. 0.15 w. % silicon 0.5 to 2.0 w. % manganese max. 0.7 w. % iron max. 0.1 w. % copper max. 0.1 w. % zinc max. 0.2 w. % titanium 0.1 to 0.6 w. % cobalt max. 0.8 w. % cerium 0.05 to 0.5 w. % zirconium max. 1.1 w. % chromium max. 1.1 w. % nickel 0.005 to 0.15 w. % vanadium max. 0.5 w.Type: ApplicationFiled: January 18, 2001Publication date: August 23, 2001Inventors: Hubert Koch, Horst Schramm, Peter Krug
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Patent number: 6277217Abstract: An aluminum alloy comprises magnesium in a range of 3.0% by weight≦Mg≦5.5% by weight, manganese in a range of 1.5% by weight≦Mn≦2.0% by weight, nickel in a range of 0.5% by weight≦Ni≦0.9% by weight, and the balance of aluminum including inevitable impurities. Particularly, the Ni content is set in the above range in order to achieve an increase in toughness of a die-cast product. Thus, it is possible to suppress the amount of an intermetallic compound AlMnNi produced and to finely divide the intermetallic compound AlMnNi.Type: GrantFiled: April 13, 1999Date of Patent: August 21, 2001Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Sadafumi Yoshino, Seiichi Koike, Eitarou Koya, Masahiko Nakagawa
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Patent number: 6258318Abstract: A weldable, corrosion resistant aluminum-magnesium alloy consisting essentially of 3 to 5% by weight magnesium (Mg), 0.05 to 0.15% by weight zirconium (Zr), 0.05 to 0.12% by weight manganese (Mn), 0.01 to 0.2% by weight titanium (Ti), 0.05 to 0.5% by weight of one or more elements selected from the scandium group of the Periodic Table and/or terbium (Tb), wherein at least 0.15% by weight scandium (Sc) is included with or without terbium (Tb) and with or without 0.05 to 0.35% by weight of one or more elements from the lanthanide series, the balance being aluminum (Al), and unavoidable contaminants not exceeding 0.2% by weight silicon (Si).Type: GrantFiled: June 14, 2000Date of Patent: July 10, 2001Assignee: EADS Deutschland GmbHInventors: Blanka Lenczowski, Rainer Rauh, Dietrich Wieser, Gerhard Tempus
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Patent number: 6248453Abstract: A high strength dispersion strengthened aluminum alloy comprising an aluminum solid solution matrix strengthened by a dispersion of particles based on the compound Al3X, where Al3X has an L12 structure, is described. Various alloying elements are employed to modify the lattice parameter of the matrix and/or the particles so that the matrix and particles have similar lattice parameters. The alloy is produced by rapid solidification from the melt.Type: GrantFiled: December 22, 1999Date of Patent: June 19, 2001Assignee: United Technologies CorporationInventor: Thomas J. Watson
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Publication number: 20010002240Abstract: A fast moving part for a plastic working apparatus, such as a press. It is formed from a composite containing, e.g., aluminum as a light metal matrix. The composite contains 10% to 45% by volume of a ceramic material and 0.1% to 1.0% by weight of free-cutting inclusions.Type: ApplicationFiled: January 5, 2001Publication date: May 31, 2001Inventor: Hideo Suzuki
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Patent number: 6238495Abstract: A high strength Al—Mg alloy in plate or extrusion form having significantly improved strength in both soft and work-hardened tempers as compared with AA5083 is provided. The materials have ductility, pitting, stress and exfoliation corrosion resistances equivalent to those of the AA5083. The materials have improved long term stress and exfoliation corrosion resistances at temperatures above 80° C. The composition is 5-6% Mg, >0.6-1.2% Mn, 0.4-1.5% Zn, 0.05-0.25% Zr, up to 0.3% Cr, up to 0.2% Ti, up to 0.5% each Fe and Si, up to 0.4% each Cu and Ag, remainder Al and inevitable impurities. Manufacture of plate of this alloy is by homogenizing an ingot, hot rolling the ingot into plate in the range 400-530° C., cold rolling the plate with or without inter-annealing, final and optionally inter-annealing of the cold rolled material at temperatures in the range 200-550° C.Type: GrantFiled: February 24, 1999Date of Patent: May 29, 2001Assignee: Corus Aluminium Walzprodukte GmbHInventors: Alfred Johann Peter Haszler, Desikan Sampath
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Patent number: 6168675Abstract: There is claimed an aluminum alloy composition consisting essentially of: about 12-22 wt % silicon, about 2.5-4.5 wt % nickel, about 0.2-0.6 wt % magnesium, up to about 1.2 wt % manganese, up to about 1.2 wt % iron, and about 0.005-0.015 wt % phosphorus. This alloy composition may further contain up to about 0.25 wt % vanadium, up to about 0.2 wt % zirconium, up to about 0.25 wt % titanium, up to about 2 wt % cerium and/or mischmetal. Because of its high temperature strengths, said alloy is suitable for manufacturing into various cast automotive components, including vehicle disk brake frames and other parts.Type: GrantFiled: December 15, 1998Date of Patent: January 2, 2001Assignee: Alcoa Inc.Inventors: Que-Tsang Fang, James R. Van Wert
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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: 6123899Abstract: This invention relates to master alloy hardeners for use in preparing aluminum base alloys. The respective concentrations of the alloying elements in the master alloy hardener are a multiple equal to or greater than 2 of the concentrations of such elements in the base alloy, and the ratios of the alloying elements in the master alloy hardener to each other are the same as the ratios of the alloying elements in the base alloy. After the aluminum base alloy and the concentration of each alloying element therein are identified, a desired multiple of such concentrations is determined. An aluminum master alloy is prepared that contains the alloying elements at concentrations equivalent to such multiple of the corresponding concentrations of the elements in the base alloy. The master alloy hardeners are added to commercially pure aluminum to provide the desired base alloy.Type: GrantFiled: March 8, 1995Date of Patent: September 26, 2000Assignee: KB Alloys, Inc.Inventors: William C. Setzer, Richard J. Malliris, Gary W. Boone, Frank P. Koch, David K. Young
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Patent number: 6074494Abstract: This invention aims to provide a nitriding method of forming a relatively thick nitride layer on the surface of an aluminum material containing silicon, and an auxiliary agent for nitriding. By using a nitriding auxiliary agent mainly comprising aluminum containing a metal such as lithium or boron, which has a high bonding strength with oxygen, coexists with silicon to form substantially no silicide, or a nitriding auxiliary agent mainly comprising an Al--Mg--Cu alloy or an Mg--Zn--Cu alloy, heat treatment is applied by nitrogen gas with the aluminum material to be nitrided contacted with the nitriding auxiliary agent. Hence, a thick nitride layer can be easily formed even on the surface of an aluminum material containing silicon, and this is most suitable to surface nitride aluminum-silicon alloys, which possess superior castability.Type: GrantFiled: June 2, 1997Date of Patent: June 13, 2000Assignees: Toyota Jidosha Kabushiki Kaisha, Toyo Aluminium Kabushiki KaishaInventors: Hirohisa Miura, Yasuhiro Yamada, Haruzo Katoh
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Patent number: 6056835Abstract: The present invention relates to a process for producing a superplastic aluminum alloy capable of being used for plastic working such as extrusion, forging and rolling. An object of the present invention is to provide an ingot-made high speed superplastic aluminum alloy in which superplasticity is developed at a strain rate higher than that of conventional static recrystallization type superplastic aluminum alloys, and a process for producing the same. The superplastic aluminum alloy of the invention has structure which is obtained by adding to a basic alloy containing from at least 4.0 to 15% by weight of Mg and from 0.1 to 1.0% by weight of one or more elements selected from the group consisting of Mm, Zr, V, W, Ti, Ni, Nb, Ca, Co, Mo and Ta, and further selective elements of Sc, Cu. Li, Sn, In and Cd, which contains from 0.1 to 4.0% by volume fraction of spheroidal precipitates of intermetallic compounds having a particle size from 10 to 200 nm, and which has a mean grain size from 0.1 to 10 .mu.m.Type: GrantFiled: January 25, 1994Date of Patent: May 2, 2000Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yoshiharu Miyake, Tetsuya Suganuma
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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: 5939164Abstract: The present invention relates to an aluminum alloy for a magnetic disk substrate having a composition consisting of, by percent by weight, 2.0 to 6.0% of Mg, 0.05 to 0.15% of Cu, 0.10 to 0.30% of Zn and 0.05 to 0.12% of Zr, wherein the contents of Cu, Zn and Zr satisfy the relationship: 0.15%.ltoreq.2Cu+6Zr-3Zn.ltoreq.0.32% (wherein Cu, Zr, and Zn respectively represent their contents in terms of percent by weight), and the composition further consists of one or both of 0.01 or more to less than 0.05% of Cr and 0.01 or more to less than 0.05% of Mn, impurities consisting of Si, Fe and Ti, which are respectively regulated to be 0.05% or less, 0.05% or less, and 0.02% or less, and other inevitable impurity elements respectively regulated to be 0.02% or less, with the remainder being Al. The present invention also relates to a clad material for a magnetic disk substrate, in which one or both surfaces of a core material, consisting of at least less than 3.Type: GrantFiled: February 25, 1997Date of Patent: August 17, 1999Assignee: The Furukawa Electric Co., Ltd.Inventors: Yoshinari Kubo, Ken-ichi Ogura, Yoichiro Bekki, Satoru Yamada, Koji Kinoshita
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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: 5911845Abstract: A high-strength extruded article of an age-hardening aluminum alloy capable of educing an achromatic dark gray color after the anodizing treatment thereof and a method for the production thereof are disclosed. The method comprises subjecting an alloy billet comprising 0.9 to 3.0% by weight of Si, 0.3 to 0.6% by weight of Mg, less than 0.3% by weight of Fe, and the balance of Al and unavoidable impurities or an alloy billet comprising 0.005 to 0.1% by weight of Ti either alone or in combination with 0.001 to 0.02% by weight of B besides the components mentioned above to a soaking treatment at a temperature in the range of from 350 to 480.degree. C. for 2 to 12 hours, extruding the soaked alloy billet at a billet temperature in the range of from 380 to 450 .degree. C., and subjecting the extruded alloy to an aging treatment at a temperature in the range of from 170 to 200.degree. C. for 2 to 8 hours.Type: GrantFiled: November 21, 1997Date of Patent: June 15, 1999Assignee: YKK CorporationInventors: Kazuyuki Fukagawa, Shoso Yamamoto, Hiroshi Chiba, Mitsunao Satomura, Kengo Kawase
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Patent number: 5865912Abstract: Described herein is an SiC-reinforced aluminum alloy composite material of the type having silicon carbide uniformly dispersed in an aluminum alloy matrix containing magnesium as a strengthening element, characterized in that the composite material contains Al4C3 in an amount smaller than 0.5 wt % and residual oxygen in an amount smaller than 0.4 wt %, and has a modulus of elasticity higher than 9000 kgf/mm.sup.2.Type: GrantFiled: August 16, 1993Date of Patent: February 2, 1999Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Hiroyuki Morimoto, Kenichiro Ouchi, Hiroshi Iwamura
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Patent number: 5803995Abstract: The calcium-aluminum system hydrogen absorbing alloy of the present invention is an alloy which is composed of a mixture P of Ca with Mg and an Al base alloy Q, has a molar ratio P:Q of 1:1.5 to 2.8 and shows a Laves phase with the C15-type structure as the fundamental structure thereof.Type: GrantFiled: February 10, 1997Date of Patent: September 8, 1998Assignee: Agency of Industrial Science and TechnologyInventors: Hideaki Tanaka, Hiroshi Miyamura, Nobuhiro Kuriyama, Tetsuo Sakai, Itsuki Uehara
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Patent number: 5772799Abstract: Can or lid stock and a method for its manufacture in which a low alloy content aluminum alloy is strip cast to form a hot strip cast feedstock, the hot feedstock is rapidly quenched to prevent substantial precipitation and then cold rolled. The can end and tab stock of the invention has strength and formability equal to higher alloy content aluminum alloy.Type: GrantFiled: September 18, 1995Date of Patent: June 30, 1998Assignee: Kaiser Aluminum & Chemical CorporationInventors: Tyzh-Chiang Sun, William Betts
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Patent number: 5772802Abstract: Can or lid stock and a method for its manufacture in which a low alloy content aluminum alloy is strip cast to form a hot strip cast feedstock, the hot feedstock is rapidly quenched to prevent substantial precipitation, annealed and quenched rapidly to prevent substantial precipitation of alloying elements and then cold rolled. The can end and tab stock of the invention has strength and formability equal to higher alloy content aluminum alloy.Type: GrantFiled: October 2, 1995Date of Patent: June 30, 1998Assignee: Kaiser Aluminum & Chemical CorporationInventors: T. C. Sun, William Betts
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Patent number: 5769972Abstract: Can or lid stock and a method for its manufacture in which a low alloy content aluminum alloy is strip cast to form a hot strip cast feedstock, the hot feedstock is rapidly annealed and quenched rapidly to prevent substantial precipitation of alloying elements and then cold rolled. The can end and tab stock of the invention has strength and formability equal to higher alloy content aluminum alloy.Type: GrantFiled: November 1, 1995Date of Patent: June 23, 1998Assignee: Kaiser Aluminum & Chemical CorporationInventors: Tyzh-Chiang Sun, William Betts
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Patent number: 5759302Abstract: There is provided Al alloys which have improved and excellent fracture toughness and fatigue characteristic and improved formability, and which can be suitably used for transportation machines, such as aircraft, railway vehicles, general mechanical parts and the like. The Al alloy contains 1 to 8% (% by weight, the same is true for the following) of Cu, containing one or more selected from a group comprising 0.4 to 0.8% of Mn, 0.15 to 0.3% of Cr, 0.05 to 0.1% of Zr and 0.1 to 2.5% of Mg, Fe and Si each being less than 0.1%, a distance between constituents being more than 85 .mu.m, and having a micro-structure fulfilling at least one of the following (a) to (c):(a) the size of Al--Mn dispersoids is 4000 .ANG. or more,(b) the size of Al--Cr dispersoids is 1000 .ANG. or more, and(c) the size of Al--Zr dispersoids is 300 .ANG. or more.Type: GrantFiled: August 10, 1995Date of Patent: June 2, 1998Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Manabu Nakai, Takehiko Eto
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Patent number: 5714271Abstract: A raw aluminum foil for use to prepare electrolytic condenser electrodes has an aluminum purity of 99.9% or higher and contains 50-500 ppm of Mg. A method of etching the raw foil to prepare the electrodes consists of a primary etching step and a secondary etching step, and the primary etching is conducted in an aqueous bath containing 3-10% by weight of HCl and 10-40% by weight of H.sub.2 SO.sub.4, at 70.degree.-90.degree. C. and with a current density of 10-40 A/dm.sup.2. The secondary etching is conducted electrolytically or chemically in a further bath containing 3-10% by weight of HCl, with or without 1% or less of H.sub.2 C.sub.2 O.sub.4 added to the further bath, at a bath temperature of 70.degree.-95.degree. C. and with a current density of 0-10 A/dm.sup.2.Type: GrantFiled: December 28, 1994Date of Patent: February 3, 1998Assignee: Showa Aluminum CorporationInventors: Tomoaki Yamanoi, Tadao Fujihira, Ichizo Tsukuda, Eizo Isoyama, Shigeru Endo
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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: 5665306Abstract: There is claimed a sheet or plate structural member suitable for aerospace applications and having improved combinations of strength and toughness. The member is made from a substantially vanadium-free aluminum-based alloy consisting essentially of: about 4.85-5.3 wt. % copper, about 0.5-1.0 wt. % magnesium, about 0.4-0.8 wt. % manganese, about 0.2-0.8 wt. % silver, about 0.05-0.25 wt. % zirconium, up to about 0.1 wt. % silicon, and up to about 0.1 wt. % iron, the balance aluminum, incidental elements and impurities, the Cu:Mg ratio of said alloy being between about 5 and 9, and more preferably between about 6.0 and 7.5. The invention exhibits a typical tensile yield strength of about 77 ksi or higher at room temperature and can be processed into various lower wing members or into the fuselage skin of high speed aircraft.Type: GrantFiled: December 26, 1995Date of Patent: September 9, 1997Assignee: Aluminum Company of AmericaInventor: Lynette M. Karabin
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Patent number: 5656105Abstract: The calcium-aluminum system hydrogen absorbing alloy of the present invention is an alloy which is composed of a mixture P of Ca with (optional) Mg and an Al base alloy Q, has a molar ratio P:Q of 1:1.5 to 2.8 and shows a Laves phase with the C15-type structure as the fundamental structure thereof.Type: GrantFiled: June 27, 1995Date of Patent: August 12, 1997Assignee: Agency of Industrial Science & TechnologyInventors: Hideaki Tanaka, Hiroshi Miyamura, Nobuhiro Kuriyama, Tetsuo Sakai, Itsuki Uehara
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Patent number: 5595615Abstract: A high toughness and high strength casting of an aluminum alloy, has comparatively thick portions with a thickness of 20 mm or more, 4-6% Si, 0.2-0.6% Mg, less than 0.15% Fe, not more than 0.4% Mn, by weight, residual aluminum and unavoidable impurities; Si(%).times.Mg(%) having a value of 1.2-2.8. In forming the casting, the aluminum alloy is under an atmosphere of more than atmospheric pressure during solidification and subsequently a T6 heat treatment is applied to casting.Type: GrantFiled: August 25, 1994Date of Patent: January 21, 1997Assignee: Hitachi Metals, Ltd.Inventors: Ryoichi Shibata, Rikizou Watanabe