Patents Examined by R. Dean
  • Patent number: 5866273
    Abstract: An iron-silicon compound powder whose predominant phases are Fe.sub.5 Si.sub.3, Fe.sub.2 Si and Fe.sub.3 Si, which is useful as a radar absorbing material (RAM) in corrosive and oxidizing atmospheres and when used with corrosive or oxidizing binders is formed by a diffusion process. The powder is made in a process that includes blending magnetic materials such as carbonyl iron, iron cobalt, and/or nickel and very pure silicon powders with an activator, such as a halide salt, and then heating the mixture between 1350.degree. F. and 1600.degree. F. in an inert atmosphere. The result is then ground until it passes through a 200 mesh screen. The powder so formed usually is then heated in air. This forms a thin protective shell about each particle of the powder after which the powder can be combined with a suitable binder to form a RAM coating capable of operating at high temperatures which is relatively unaffected by corrosive atmospheres.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: February 2, 1999
    Assignee: The Boeing Company
    Inventors: Edwin W. Wiggins, David N. Drennan
  • Patent number: 5374319
    Abstract: A process is provided for welding a gamma-prime precipitation-strengthened nickel base superalloy by heating the weld area and adjacent region to a ductile temperature, welding while maintaining the entire weld area and adjacent region at the ductile temperature and holding the weldment, weld area and adjacent region at the ductile temperature until the entire weld has solidified. The ductile temperature is above the aging temperature but below the incipient melting temperature of the superalloy.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: December 20, 1994
    Assignee: Chromalloy Gas Turbine Corporation
    Inventors: Richard J. Stueber, Thomas Milidantri, Moshen Tadayon
  • Patent number: 5344507
    Abstract: An aluminum-alloy, which is wear-resistant and does not wear greatly the opposed cast iron or steel, and which can be warm worked. The alloyings the following composition and structure. Composition: Al.sub.a Si.sub.b M.sub.c X.sub.d T.sub.e (where M is at least one element selected from the group consisting of Fe, Co and. Ni; X is at least one element selected from the group consisting of Y, Ce, La and Mm (misch metal); Y is at least one element selected from the group consisting of Mn, Cr, V, Ti, Mo, Zr, W, Ta and Hf; a=50-85 atomic %, b=10-49 atomic %, c=0.5-10 atomic %, d=0.5-10 atomic %, e=0-10 atomic %, and a+b+c+d+e=100 atomic %. Structure: super-saturated face-centered cubic crystals and fine Si precipitates.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: September 6, 1994
    Assignees: Tsuyoshi Masumoto, Yoshida Kogyo KK, Teikoku Piston Ring Co., Ltd.
    Inventors: Tsuyoshi Masumoto, Akihisa Inoue, Kazuhiko Kita, Hitoshi Yamaguchi
  • Patent number: 5334263
    Abstract: A superalloy article has a nickel-based superalloy substrate containing TCP-phase forming elements such as rhenium, chromium, tantalum and tungsten. A carbide precipitate-containing region is formed within the substrate extending to a carbide depth below a surface of the substrate, preferably by depositing carbon on the surface of the substrate and diffusing the carbon into the substrate. An aluminum-rich diffusion layer extends from the surface of the substrate to an aluminide depth below the surface of the substrate. Preferably, the carbide depth is about the same as the aluminide depth. The presence of the carbide precipitates inhibits the formation of the deleterious TCP-phase.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: August 2, 1994
    Assignee: General Electric Company
    Inventor: Jon C. Schaeffer
  • Patent number: 5332455
    Abstract: A rapidly solidified brazing alloy consists essentially of about 14 to 45 weight percent magnesium and 0 to 10 weight percent of at least one element selected from the group consisting of silicon, bismuth, strontium, lithium, copper, calcium, zinc and tin, the balance being aluminum and incidental impurities. The alloy has a microcrystalline structure containing uniformly distributed intermetallic particles. It has the form of a foil (liquidus temperature <570.degree. C.) and can be used to braze non-heat-treatable rapidly solidified Al-Fe-V-Si alloy foil, sheet, plate, and tubing to produce components such as deicing duct, overduct, radiator, heat exchanger, evaporator, honeycomb panel for elevated temperature applications.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: July 26, 1994
    Assignee: AlliedSignal Inc.
    Inventors: Chin-Fong Chang, Santosh K. Das, Michael S. Zedalis
  • Patent number: 5330712
    Abstract: An alloy consisting essentially of about 0.1 to 7% bismuth, up to about 16% tin, up to about 25% zinc, up to about 27% nickel, about 0.1 to 1% mischmetal and the balance copper and incidental impurities.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: July 19, 1994
    Assignee: Federalloy, Inc.
    Inventor: Akhileshwar R. Singh
  • Patent number: 5330591
    Abstract: A nickel-based alloy useful in the manufacture of a glass fibre centrifuge of which the composition consists essentially of the following elements expressed as percentage by weight:______________________________________ Cr 27.5-29.5% W 6.5-7.8% C 0.69-0.73% Fe 7-10% ______________________________________the remainder substantially being nickel and having in its crystalline structure M.sub.23 C.sub.6 type carbides, M being chromium, at least one equivalent metal, or combination thereof, the M.sub.23 C.sub.6 carbides being substantially secondary.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: July 19, 1994
    Assignee: Isover Saint-Gobain
    Inventor: Stella Vasseur
  • Patent number: 5328500
    Abstract: A method for producing a metal composite powder, such as a high alloy metal composite powder, which includes pretreating the alloying components prior to milling with a base iron powder. A short milling time is used, yielding a metal composite powder which exhibits good compactability, microstructure, controllable flow, post-sintering homogeneity, and offers a more economical production method.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: July 12, 1994
    Inventors: Robert J. Beltz, Joseph D. Dankoff, Melvin L. McClellan
  • Patent number: 5328660
    Abstract: Disclosed is a high solidus temperature, high service temperature, high strength multi-component solder alloy containing a major portion of Sn, and effective amounts of Ag, Bi and In. Preferably the solder alloy contains 78.4 weight percent Sn, 2.0 weight % Ag, 9.8 weight % Bi, and 9.8 weight % In.
    Type: Grant
    Filed: June 16, 1993
    Date of Patent: July 12, 1994
    Assignee: International Business Machines Corporation
    Inventors: Stephen G. Gonya, James K. Lake, Randy C. Long, Roger N. Wild
  • Patent number: 5326528
    Abstract: A magnesium alloy comprises magnesium, zinc in the amount of 4.0 to 15.0 weight % and silicon in the amount of 0.5 to 3.0 weight %, the weight % being based on the total amount of the alloy. The magnesium alloy further may contain manganese in the range of 0.2 to 0.4 weight %, beryllium in the range of 5 to 20 ppm by weight or rare earth metals in the range of 0.1 to 0.6 weight.
    Type: Grant
    Filed: January 13, 1993
    Date of Patent: July 5, 1994
    Assignee: Ube Industries, Ltd.
    Inventors: Kunihiko Makino, Noboru Miyamoto, Kyosuke Kanemitsu
  • Patent number: 5322574
    Abstract: The present invention provides a new copper alloy containing silver from 4 to 32 at. %, which is useful for a magnet conductor, an IC lead frame, etc., having simultaneously a high strength and a high conductivity, manufactured by blending from 4 to 32 at. % silver into copper, casting, rapidly cooling and cold-working wherein the cold-working step includes a hot working treatment at a reduction rate of 40% to 70% at temperatures of from 300.degree. to 500.degree. C.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: June 21, 1994
    Assignee: National Research Institute For Metals
    Inventors: Yoshikazu Sakai, Kiyoshi Inoue, Hiroshi Maeda
  • Patent number: 5318639
    Abstract: Method of manufacturing a grain oriented silicon steel sheet. An annealing separating agent mainly composed of MgO is coated on a surface of a decarburized silicon steel sheet. The silicon steel sheet is subjected to secondary recrystallization annealing and then purification annealing. The annealing separating agent contains Ti oxide or a Ti compound which can be oxidized by heating. The purification annealing is conducted in steps. A non-oxidizing atmosphere having a high nitrogen concentration is present in one step. A hydrogen atmosphere having a low nitrogen concentration is present in a subsequent step.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: June 7, 1994
    Assignee: Kawasaki Steel Corporation
    Inventors: Yasuyuki Hayakawa, Ujihiro Nishiike, Bunjiro Fukuda, Masataka Yamada, Tetsuya Oishi, Shigeru Yoshida, Yoh Shimizu
  • Patent number: 5316599
    Abstract: Ni-Ti intermetallic compounds are produced by subjecting a laminate of Ni foils and Ti foils to a rolling for thickness adjustment and then to a diffusion heat treatment at multistages within a particular temperature range for a particular time.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: May 31, 1994
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Kazuo Ebato, Masaomi Tsuda, Tsutomu Oomori
  • Patent number: 5312476
    Abstract: A non-amalgamated zinc alloy powder for use in an alkaline cell which consists of elements component selected from among the following combinations (1) to (3):(1) 0.01 to 0.5% by weight of bismuth, 0.01 to 0.5% by weight of indium, not less than 0.005% by weight to less than 0.01% by weight of calcium,(2) not less than 0.005% by weight to less than 0.01% by weight of calcium, 0.01 to 0.5% by weight of bismuth, 0 to 0.5% by weight of aluminium, and(3) 0.01 to 0.5% by weight of lead, 0.01 to 0.5% by weight of indium, 0 to less than 0.01% by weight of calcium, 0.01 to 0.5% by weight of aluminium, the balance being zinc and containing 1 ppm or less of iron, and which can greatly suppress the evolution of hydrogen gas and maintain the discharge performance on a practical level, and the method to produce the same.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: May 17, 1994
    Assignees: Matsushita Electric Industrial Co., Ltd., Mitsui Mining & Smelting Co., Ltd.
    Inventors: Toyohide Uemura, Tomotaka Motomura, Tomiko Yamaguchi, Junichi Asaoka, Shuji Tsuchida
  • Patent number: 5312498
    Abstract: A method of producing an aluminum-based alloy product having improved exfoliation resistance and fracture toughness which comprises providing an aluminum-based alloy composition consisting essentially of about 5.5-10.0% by weight of zinc, about 1.75-2.6% by weight of magnesium, about 1.8-2.75% by weight of copper with the balance aluminum and other elements. The aluminum-based alloy is worked, heat treated, quenched and aged to produce a product having improved corrosion resistance and mechanical properties. The amounts of zinc, magnesium and copper are stoichiometrically balanced such that after precipitation is essentially complete as a result of the aging process, no excess elements are present. The method of producing the aluminum-based alloy product utilizes either a one- or two-step aging process in conjunction with the stoichiometrically balancing of copper, magnesium and zinc.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: May 17, 1994
    Assignee: Reynolds Metals Company
    Inventor: Kevin R. Anderson
  • Patent number: 5310522
    Abstract: Alloys are provided which consist essentially by weight percentages of from about 30% to about 35% Ni, from about 22% to about 25% Cr, from about 4% to about 6.5% Mo, from about 0.2% to about 1.5% W, from about 0.2% to about 0.6% Nb, from about 0.1% to about 0.6% Ti, from about 0.35% to about 1.75% Co, from about 0.05% to about 0.3% C, from about 0.2% to about 1.3% Si, from about 0.2% to about 1.5% Mn, and the balance essentially iron and the usual impurities.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: May 10, 1994
    Assignee: Carondelet Foundry Company
    Inventor: John H. Culling
  • Patent number: 5308409
    Abstract: A method of strengthening an aluminum casting by modifying qualities of a specified part thereof comprises the steps of forming a weld overlay on the specified part using powders made of heat resisting element and remelting the specified part, now overlaid with the layer of heat resisting alloy layer, using high density energy.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: May 3, 1994
    Assignee: Isuzu Motor Limited
    Inventors: Tadashi Kamimura, Akira Tsujimura
  • Patent number: 5306361
    Abstract: In the heat treatment in the field of a thermite weld between rail ends, the rail ends and the weld are enclosed within a containment filled with an aluminothermic material mixture. The mixture is ignited and the rail ends and the thermite weld are heat-treated for a given period. After the given period, the aluminothermic reaction products and the containment are removed, and an air quench unit is placed about the weld and rail ends and compressed air is directed at the weld and rail ends for a given time period. After the removal of the air quench unit, the weld is allowed to cool to ambient temperature.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: April 26, 1994
    Inventors: Gordon O. Besch, Robert H. Kachik, Mark A. Swartz, Frank K. Kuster, Hans J. Guntermann
  • Patent number: 5306358
    Abstract: An inert gas nitrogen mixture is used as a shielding gas to prevent weld hot cracking in superalloys containing zirconium and/or boron. The gas mixture preferably contains argon and about 2 to 8% by volume nitrogen. Test data show excellent results are obtained when gas tungsten arc welding HAYNES 214 alloy which normally contains boron and zirconium and a minimal content of titanium.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: April 26, 1994
    Assignee: Haynes International, Inc.
    Inventors: George Y. Lai, Robert B. H. Herchenroeder, Christopher R. Patriarca
  • Patent number: 5306353
    Abstract: In grain oriented silicon steel sheets containing MnSe as a main inhibitor, an iron loss is reduced by increasing the magnetic flux density and realizing the thinning of product thickness and fine division of crystal grains while utilizing the stability of secondary recrystallization as a merit of such a sheet. In this case, 0.02-0.30% of Cu is added to a slab of the above grain oriented silicon steel, and particularly the decarburization annealing and/or the final finish annealing are carried out under particular conditions.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: April 26, 1994
    Assignee: Kawasaki Steel Corporation
    Inventors: Yasuyuki Hayakawa, Michiro Komatsubara, Takahiro Kan, Hirotake Ishitobi, Katsuo Iwamoto