Silicon Containing Patents (Class 420/544)
  • Patent number: 5595615
    Abstract: 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: Grant
    Filed: August 25, 1994
    Date of Patent: January 21, 1997
    Assignee: Hitachi Metals, Ltd.
    Inventors: Ryoichi Shibata, Rikizou Watanabe
  • Patent number: 5578144
    Abstract: To provide a high-strength, high-ductility cast aluminum alloy, which enables a near-net shape product to be produced by improving the casting structure of an aluminum alloy, particularly by using specific constituents and controlling the cooling rate, and a process for producing the same. The high-strength, high-ductility cast aluminum alloy of the present invention is characterized in that it has a structure comprising fine grains of .alpha.-Al, having an average grain diameter of not more than 10 .mu.m, surrounded by a network of a compound of Al-lanthanide-base metal, the .alpha.-Al grains forming a domain, that the domain comprises an aggregate of .alpha.-Al grains which have been refined, cleaved, and ordered in a single direction and that it has a composition represented by the general formula Al.sub.a Ln.sub.b M.sub.c wherein a, b, and c are, in terms of by weight, respectively 75%.ltoreq.a.ltoreq.95%, 0.5%.ltoreq.b<15%, and 0.5%.ltoreq.c<15%.
    Type: Grant
    Filed: June 14, 1995
    Date of Patent: November 26, 1996
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuaki Satou, Yukio Okochi
  • Patent number: 5573606
    Abstract: The present invention relates to an aluminum base die casting alloy having substantially improved mechanical properties, and a method for making die cast products from the alloy. More particularly the improved aluminum based alloy comprises 2.5-4.0% by weight magnesium, 0.2-0.6% by weight manganese, 0.25-0.6% by weight iron, 0.2-0.45% by weight silicon, less than 0.003% by weight beryllium with the remainder being aluminum.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: November 12, 1996
    Assignee: Gibbs Die Casting Aluminum Corporation
    Inventors: James M. Evans, Richard J. Hagan, William C. Routh, Roland N. Gibbs
  • Patent number: 5527404
    Abstract: An improved elongate aluminum alloy product, and a method of producing such a product, ideally suited for use as a component in a vehicle frame or subassembly, i.e., body-in-white. The alloy consists of essentially 0.45 to 0.7% magnesium, and about 0.35 to 0.6%, silicon, and about 0.1 to 0.35%, vanadium, and, 0.1-0.4% iron, preferably 0.15 to 0.3%, the balance substantially aluminum and incidental elements and impurities.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: June 18, 1996
    Assignee: Aluminum Company of America
    Inventor: Allison S. Warren
  • Patent number: 5523050
    Abstract: A method is described for preparing a refined or reinforced eutectic or hyper-eutectic metal alloy, comprising: melting the eutectic or hyper-eutectic metal alloy, adding particles of non-metallic refractory material to the molten metal matrix, mixing together the molten metal alloy and the particles of refractory material, and casting the resulting mixture under conditions causing precipitation of at least one intermetallic phase from the molten metal matrix during solidification thereof such that the intermetallics formed during solidification wet and engulf said refractory particles. The added particles may be very small and serve only to refine the precipitating intermetallics in the alloy or they may be larger and serve as reinforcing particles in a composite with the alloy. The products obtained are also novel.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: June 4, 1996
    Assignee: Alcan International Limited
    Inventors: David J. Lloyd, Iljoon Jin
  • Patent number: 5516382
    Abstract: An aluminum alloy useful for drawing and/or ironing, particularly of drink cans. The alloy consists essentially of, in weight percent, Fe<0.25; Si<0.25; Mn from 1.05 to 1.6; Mg from 0.7 to 2.5; Cu from 0.20 to 0.6; Cr from 0 to 0.35; Ti from 0 to 0.1; V from 0 to 0.1; other elements: each <0.05; total<0.15; and remainder Al.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: May 14, 1996
    Assignee: Pechiney Rhenalu
    Inventor: Guy-Michel Raynaud
  • Patent number: 5484492
    Abstract: A cast hypereutectic Al-Si alloy having 12% to 15% Si, and a method of producing such alloy. The alloy and a melt used in the method has at least one element of a first group of elements and at least one element of a second group of elements and further comprises Cu 1.5 to 5.5%; Ni 1.0 to 3.0%; Mg 0.1 to 1.0%; Fe 0.1 to 1.0%; Mn 0.1 to 0.8%; Zr 0.01 to 0.1; Zn 0 to 3.0%; Sn 0 to 0.2%; Pb 0 to 0.2%; Cr 0 to 0.1; Si modifier (Na, Sr) 0.001 to 0.1%; B (elemental) 0.05% maximum; Ca 0.03% maximum; P 0.05% maximum; and others 0.05% maximum each, the balance, apart from incidental impurities being Al. The element of the first group provides stable nucleant particles in the melt. The element of the second groups forms an intermetallic phase such that crystals of the phase form in advance of and nucleate primary Si to provide complex particles which promote nucleation of Al-Si eutectic on cooling of the melt below the eutectic solidification temperature.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: January 16, 1996
    Assignee: Comalco Aluminum Limited
    Inventors: Kevin P. Rogers, Christian Simensen
  • Patent number: 5478418
    Abstract: An aluminum alloy powder for sliding members includes Fe in an amount of from 0.5 to 5.0% by weight, Cu in an amount of from 0.6 to 5.0% by weight, B in an amount of from 0.1 to 2.0% by weight and the balance of Al. An aluminum alloy includes a matrix made from the aluminum alloy powder and at least one member dispersed, with respect to whole of the matrix taken 100% by weight, in the matrix, and selected from the group consisting of B in an amount of from 0.1 to 5.0% by weight, boride in an amount of from 1.0 to 15% by weight and iron compound in an amount of from 1.0 to 15% by weight, and thereby it exhibits the tensile strength of 400 MPa or more. The aluminum alloy powder and the aluminum alloy are suitable for making sliding members like valve lifters for automobiles.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: December 26, 1995
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyo Aluminum Kabushiki Kaisha
    Inventors: Hirohisa Miura, Yasuhiro Yamada, Hirohumi Michioka, Jun Kusui, Akiei Tanaka
  • Patent number: 5453244
    Abstract: There is disclosed a novel aluminum alloy bearing which exhibits a more excellent fatigue resistance than conventional bearings even under such conditions of use as at a high temperature and under a high load. The aluminum alloy bearing has an aluminum bearing alloy layer containing, by weight, 1 to 10% Zn, 0.1 to 5% Cu, 0.05 to 3% Mg, 0.1 to 2% Mn, 0.1 to 5% Pb, 0.1 to 2% V, and 0.03 to 0.5% in total of Ti--B, and further may optionally contain not more than 8% Si, 0.05 to 0.5% Sr, and Ni, Co and Cr. The alloy may be bonded to a steel metal back sheet, and a surface layer may be formed on the surface of the bearing. By use of the composition of the alloy of the invention, the fatigue resistance of the aluminum alloy bearings has been improved, and such an improved bearing can fully achieve a bearing performance even under severe conditions of use as at high temperature and under a high load.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: September 26, 1995
    Assignee: Daido Metal Company Ltd.
    Inventors: Tadashi Tanaka, Masaaki Sakamoto, Tohru Kato, Yoshiaki Sato
  • Patent number: 5417919
    Abstract: There is provided an aluminum alloy sheet material having high strength as well as excellent formability, which consists essentially, by weight percent, of 4.5 to 6% Mg, 0.0005 to 1% rare earth elements, 0.001 to 0.15% Ti, 0.0001 to 0.004% B, 0.05 to 0.2% Fe, 0.05 to 0.1% Si, 0.0001 to 0.03% Be, and the balance of Al and inevitable impurities. The aluminum alloy sheet material may further contain at least one element selected from the group consisting of 0.05 to 0.3% Cu, 0.1 to 1% Zn and 0.05 to 0.2% Mn, if required.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: May 23, 1995
    Assignee: Mitsubishi Aluminum Co., Ltd.
    Inventors: Koichi Ohori, Yoshinobu Komiyama, Hiroshi Saitoh, Masahiko Miyazaki
  • Patent number: 5407636
    Abstract: An Al-based alloy represented by the general formula Al.sub.bal Ti.sub.a M.sub.b and Al.sub.bal Ti.sub.a M.sub.b Q.sub.c wherein M represents at least one element selected from among V, Cr, Mn, Co, Cu, Y, Zr, Nb, Mo, Hf, Ta and W; Q represents at least one element selected from Mg and Si; and a, b and c are, in percentages by weight, 7.ltoreq.a.ltoreq.20, 0.2.ltoreq.b.ltoreq.20 and 0.1.ltoreq.c.ltoreq.5. A compacted and consolidated material is produced by melting a material having the above alloy composition, rapidly solidifying the melt into powder or flakes; compacting the resultant powder or flakes; and subjecting the compacted powder or flakes to press forming and consolidating by a conventional plastic working. The aluminum-based alloy and the compacted and consolidated material thereof have a high strength, a good ductility and an excellent strength at high temperatures.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: April 18, 1995
    Assignee: YKK Corporation
    Inventor: Kazuhiko Kita
  • Patent number: 5350436
    Abstract: An aluminum alloy composite material for brazing has a core member, an Al--Si filler member clad on one surface of the core member and an aluminum alloy cladding member clad on the other side of the core member. The core member is made of an aluminum alloy containing 0.3 to 1.3 wt. % of Si, 0.3 to 1.5 wt. % of Mn, 0.02 to 0.3 wt. % of Ti, and, as required, 0.3 wt. % or less of Cr and 0.2 wt. % or less of Zr, the content of Mg being restricted to 0.2 wt. % or less and the content of the Cu being restricted to 0.2 wt. % or less as an impurity. The cladding member is made of an aluminum alloy containing 0.3 to 3 wt. % of Mg, 5 wt. % or less of Zn, 0.1 to 1.0 wt. % of Si. The thickness of the core member is preferably, 2.5 times or more greater than that of the filler member, falling within a range of 0.1 to 1 mm.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: September 27, 1994
    Assignees: Kobe Alcoa Transportation Products Ltd., Nippondenso Co., Ltd.
    Inventors: Osamu Takezoe, Jun Takigawa, Tadashi Okamoto, Mituo Hashiura, Sunao Fukuda, Keizo Takeuchi, Yasuaki Isobe
  • Patent number: 5217546
    Abstract: A cast hypereutectic Al-Si alloy with from 12-15% Si, having excellent wear resistance and machinability, improved fatigue strength and good levels of ambient and elevated temperature properties is provided, as well as a method of producing such alloy. The alloy and a melt used in the method contains Sr in excess of 0.10% and Ti in excess of 0.005%, the alloy further comprising: Cu 1.5 to 5.5%, Ni 1.0 to 3.00%, Mg 0.1 to 1.0%, Fe 0.1 to 1.0%, Mn 0.1 to 0.8%, Zr 0.01 to 0.1%, Zn 0 to 3.0%, Sn 0 to 0.2%, Pb 0 to 0.2%, Cr 0 to 0.1%, Na 0 to 0.01%, B (elemental) 0.05% maximum, Ca 0.003% maximum, P 0.003% maximum. Others 0.05 maximum each, the balance, apart from incidental impurities, being Al. The level of Sr in excess of 0.10% and Ti in excess of 0.
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: June 8, 1993
    Assignee: Comalco Aluminum Limited
    Inventors: John A. Eady, Christopher J. Heathcock, Peter L. Kean, Kevin P. Rogers, Rodney A. Legge
  • Patent number: 5169462
    Abstract: An aluminum-lithium based alloy which comprises 10-20 wt. % silicon, 1.5-5.0 wt. % copper, 1.0-4.0 wt. % lithium, 0.45-1.5 wt. % magnesium, 0.01-1.3 wt. % iron, 0.01-0.5 wt. % manganese, 0.01-1.5 wt. % nickel, 0.01-1.5 wt. % zinc, 0.01-0.5 wt. % silver, 0.01-0.25 wt. % titanium and the balance aluminum. The alloy is utilized to cast high temperature assemblies including pistons which have a reduction in density and similar mechanical properties including tensile strengths to alloys presently used.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: December 8, 1992
    Assignee: Reynolds Metals Company
    Inventors: Richard A. Morley, William H. Overbagh
  • Patent number: 5141703
    Abstract: In a fusion-metallurgical process of producing fine-grained hereogeneous, ductile alloys which contain Mg.sub.2 Si, the grain size of the Mg.sub.2 Si crystallites formed by primary solidification is kept below 30 .mu.m by doping the molten alloy with 0.05 to 2% by weight of phosphorus.
    Type: Grant
    Filed: May 7, 1991
    Date of Patent: August 25, 1992
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Eberhard E. Schmid, Kersten V. Oldenburg, Georg Frommeyer
  • Patent number: 5110371
    Abstract: An aluminum alloy consists of, by weight, from 0.08 to 0.50 percent silicon, from 0.15 to 0.90 percent iron, the weight ratio of iron to silicon being from 1.4 to 2.2, and the remainder aluminum, intermetallic compounds of .alpha.-type Al-Fe-Si system being contained in the alloy. A light gray oxide film is formed on the alloy by anodic treatment.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: May 5, 1992
    Assignee: Nippon Light Metal Company, Ltd.
    Inventors: Takeshi Moriyama, Katsuji Ogawa, Fumio Ohtake, Akito Nishizawa
  • Patent number: 5104615
    Abstract: An aluminum material suitable for forming the substrate of a photoconductor, such as a photoconductive drum, for electrophotographic copying machine, capable of being satisfactorily mirror-finished by precision machining. The Ti content of the aluminum material is less than 0.008% by weight. The aluminum material contains at least one of Mg, Si and Mn. The Mg content, Si content and Mn content of the aluminum material are in the range of 0.1 to 5.0% by weight, in the range of 0.1 to 1.0% by weight and in the range of 0.1 to 1.5% by weight, respectively.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: April 14, 1992
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Tadashi Aiura, Osamu Takezoe
  • Patent number: 4929421
    Abstract: A new family of medium and high strength, thermally stable aluminum based alloys are described having the following composition: 0.4 to 1.2% by weight chromium, 0.3 to 0.8% by weight zirconium, 1.5 to 2.5% by weight manganese, 0 to 2.0% by weight magnesium and the balance essentially aluminum. These alloys can be produced on a twin-roll caster preferably at a thickness of no more than 4 mm and a casting temperature of at least 820.degree. C.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: May 29, 1990
    Assignee: Alcan International Limited
    Inventors: Iljoon Jin, David J. Lloyd
  • Patent number: 4847048
    Abstract: An alluminum alloy composition represented by the following general formula (I):Al.sub.a Mg.sub.b Ni.sub.c Mn.sub.d Si.sub.e Cu.sub.f Fe.sub.g Ti.sub.h Zn.sub.i B.sub.k Zr.sub.l (I)whereinb=about 2-8 wt %c=0--about 7 wt %d=0--about 3.0 wt %e=0--about 1.0 wt %f=0--about 1.0 wt %g=0--about 0.5 wt %h=0--about 0.3 wt %i=0--about 0.3 wt %j=0--about 0.1 wt %k=0--about 0.1 wt % andl=0--about 0.3 wt %; provided thatc+d.gtoreq.about 0.5 wt %, anda is balance.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: July 11, 1989
    Assignee: Ryobi Limited
    Inventors: Naomi Nishi, Shigetake Kami, Takashi Yamaguchi
  • Patent number: 4735774
    Abstract: An aluminum-lithium alloy exhibiting good fracture toughness and relatively high strength has a nominal composition of 2.5 percent lithium, 1.0 percent magnesium, 1.6 percent copper, 0.12 percent zirconium with the balance being aluminum and trace elements.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: April 5, 1988
    Assignee: The Boeing Company
    Inventors: G. Hari Narayanan, William E. Quist, R. Eugene Curtis
  • Patent number: 4729939
    Abstract: An aluminum alloy support for lithographic printing plates produced by cold rolling an aluminum alloy composed substantially of Mg 0.05 to 3 wt %, Si 0.05 to 0.7 wt %, Zr 0.01 to 0.25 wt %, and Fe 0.05 to 0.4 wt %, with the balance being Al and impurities, and imparting a grained surface to the plate surface has high mechanical strength, good heat softening resistance, excellent water retentive property, and long press life.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: March 8, 1988
    Assignees: Nippon Light Metal Company Limited, Fuji Photo Film Co. Ltd.
    Inventors: Yasuhisa Nishikawa, Tadayuki Katoh, Misako Kawasaki, Kazushige Takizawa
  • Patent number: 4603029
    Abstract: An aluminum-lithium alloy exhibiting good fracture toughness and relatively high strength has a nominal composition of 2.5 percent lithium, 0.6 percent magnesium, 1.8 percent copper, 0.12 percent zirconium with the balance being aluminum and trace elements.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: July 29, 1986
    Assignee: The Boeing Company
    Inventors: William E. Quist, R. Eugene Curtis, G. Hari Narayanan
  • Patent number: 4525326
    Abstract: 0.05 to 0.2% vanadium and manganese in a concentration equal to 1/4 to 2/3 of the iron concentration are added to an aluminum wrought alloy containing 0.3-1.0% Mg, 0.3-1.2% Si, 0.1-0.5% Fe and up to 0.4% Cu. This alloy is employed mainly for the manufacture of extruded products.
    Type: Grant
    Filed: August 18, 1983
    Date of Patent: June 25, 1985
    Assignee: Swiss Aluminium Ltd.
    Inventors: Pius Schwellinger, Alois Ried, Jurgen Timm, Manfred Heckler
  • Patent number: 4511632
    Abstract: A clad sheet comprising an aluminum alloy sheet having excellent high-temperature sagging resistance and thermal conductivity comprising an aluminum alloy sheet clad on at least one surface with a brazing metal, said aluminum alloy sheet consists essentially of:manganese: from 0.1 to 0.5 wt. %,silicon: from 0.1 to 0.8 wt. %,zirconium: from 0.02 to 0.2 wt. %,and, the balance being aluminum and incidental impurities.The clad sheet is particularly adapted to be used as a fin material for tubes of a heat exchanger, said aluminum alloy sheet may also contain chromium within the range of from 0.05 to 0.4 wt. % and/or at least one element selected from the group consisting of:magnesium: from 0.1 to 0.7 wt. %, and,copper: from 0.1 to 0.7 wt. %,total amount of said magnesium and said copper being up to 1.0 wt. %.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: April 16, 1985
    Assignee: Mitsubishi Aluminum Kabushiki Kaisha
    Inventors: Ken Toma, Masanao Iida, Yo Takeuchi
  • Patent number: 4502900
    Abstract: This invention relates to a wrought aluminum alloy, to its use for making semifinished and finished products and to processes of improving the properties, particularly the strength properties, of semifinished and finished products made of that alloy.A wrought aluminum alloy is proposed which contains 1.15 to 2.0% manganese, more than 1.0 and up to 2.0% silicon, 0.25 to 0.65% magnesium, 0.2 to 1.0% iron, not in excess of 0.3% copper, not in excess of 0.2% zinc, not in excess of 0.1% zirconium, not in excess of 0.1% titanium, balance aluminum and other impurities in a total not in excess of 0.2%.In FIG. 1, the ultimate tensile stresses which can be obtained with three different combinations of cooling rate and subsequent final cold reduction are plotted as a function of the magnesium content, the prior art being represented by magnesium contents of 0.2% and less.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: March 5, 1985
    Assignee: Vereinigte Deutsche Metallwerke AG
    Inventor: Heinz J. Althoff