Heat Treating Patents (Class 148/27)
  • Patent number: 11174557
    Abstract: Materials and a process for forming a protective oxide coating. The high temperature coating system (108) includes at least a thermal barrier coating layer (104) and a thermally stable, deposit resistant protective layer (106) on the thermal barrier coating layer (104).
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: November 16, 2021
    Assignee: Siemens Energy Global GmbH & Co. KG
    Inventors: Anand A. Kulkarni, Atin Sharma
  • Patent number: 11152195
    Abstract: A MgO-based ceramic film according to the present invention contains crystalline phases of MgO and MgAl2O4, and Al is dissolved in the MgO to form a solid-solution. The ceramic film exhibits a diffraction peak representing the (200) plane of MgO at an angle 2? of more than 42.92° in CuK? XRD measurement. A shoulder preferably appears on the higher angle side of the peak representing the (200) plane of MgO. The mass ratio MgO/Al2O3 of MgO to Al2O3 converted from Mg and Al in terms of oxides is preferably higher than 2.33.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: October 19, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Yosuke Sato, Katsuhiro Inoue, Yuji Katsuda
  • Patent number: 10391417
    Abstract: In order to eliminate liquid accumulation occurring between a gas-liquid mixing part and a vaporization part to stably perform liquid feeding to the vaporization part and vaporization in the vaporization part, a liquid material vaporization apparatus includes: a gas-liquid mixing part adapted to mix a liquid material and gas to produce a gas-liquid mixture; and a vaporization part adapted to heat the gas-liquid mixture to vaporize the liquid material. In addition, the gas-liquid mixing part has a gas-liquid mixture lead-out pipe for leading out the gas-liquid mixture, the vaporization part has a heating flow path HS for heating the gas-liquid mixture, and a lead-out port of the gas-liquid mixture lead-out pipe is arranged in the heating flow path HS.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: August 27, 2019
    Assignee: HORIBA STEC, Co., Ltd.
    Inventors: Taketoshi Ito, Masaki Inoue
  • Patent number: 8468693
    Abstract: A dielectric device has a first conductor and a dielectric disposed thereon. An intermediate region is formed between the first conductor and dielectric. In the intermediate region, an additive different from the first conductor and dielectric and the dielectric are mixed with each other. The additive contains at least one element of Si, Al, P, Mg, Mn, Y, V, Mo, Co, Nb, Fe, and Cr.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: June 25, 2013
    Assignee: TDK Corporation
    Inventors: Tomohiko Katoh, Kenji Horino, Yuko Saya
  • Patent number: 8313834
    Abstract: To provide a core for reactor capable of reducing the eddy current loss and improving the direct current superposition characteristics, a manufacturing method thereof, and a reactor. A core for reactor M is obtained by press molding metallic magnetic particles coated with an insulating coated film, and the metallic magnetic particles have the following compositions: (1) the mean particle size is 1 ?m or more and 70 ?m or less; (2) the variation coefficient Cv which is a ratio (?/?) of the standard deviation (?) of the particle size and the mean particle size (?) is 0.40 or less; and (3) the degree of circularity is 0.8 or more and 1.0 or less. On the outside of the insulating coated film, at least one of a heat-resistance imparting protective film and a flexible protective film is further provided as a outer coated film.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: November 20, 2012
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Atsushi Sato, Toru Maeda
  • Patent number: 7658995
    Abstract: A nickel powder exhibits superior oxidation behavior, reduction behavior and sintering behavior in a production process for a multilayer ceramic capacitor and is suitable for the capacitor; a production method therefor is also provided. The nickel powder, which may be used as a raw material, is treated with a sulfur-containing compound, and the sulfur-containing compound is coated on the surface thereof, or alternatively, a nickel-sulfur compound layer is formed on the surface thereof.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: February 9, 2010
    Assignee: Toho Titanium Co., Ltd.
    Inventor: Mitsugu Yoshida
  • Publication number: 20090220698
    Abstract: Rare earth compositions comprising nanoparticles are described along with various nanotechnology applications of such nanoparticles. The compositions of the nanomaterials discussed may include scandium (Sc), yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).
    Type: Application
    Filed: February 2, 2009
    Publication date: September 3, 2009
    Applicant: PPG Industries Ohio, Inc.
    Inventor: Tapesh Yadav
  • Patent number: 7501081
    Abstract: A nanostructured monolithic titanium boride (TiB) material and methods of forming such a material are disclosed and described. This material has a room-temperature four-point flexural strength about three times that of commercially available titanium diboride (TiB2). The achievement of nanostructured internal microstructural arrangement having a network of interconnected titanium monoboride whiskers affords a very high strength to this material above some of the best ceramic materials available in the market. The material contains a small amount of titanium and a densifier, but it is largely made of TiB phase with substantially no TiB2. The nanostructured monolithic titanium boride material can be formed by high temperature processing of a powder precursor having carefully selected weight and size distributions of titanium powder, titanium diboride powder, and densifier powder.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: March 10, 2009
    Assignee: University of Utah Research Foundation
    Inventor: K. S. Ravi Chandran
  • Publication number: 20090039477
    Abstract: In the silicon nitride substrate concerning an embodiment of the invention, degree of in-plane orientation fa of ? type silicon nitride is 0.4-0.8. Here, degree of in-plane orientation fa can be determined by the rate of the diffracted X-ray intensity in each lattice plane orientation in ? type silicon nitride. As a result of research by the inventors, it turned out that both high fracture toughness and high thermal conductivity are acquired, when degree of in-plane orientation fa was 0.4-0.8. Along the thickness direction, both the fracture toughness of 6.0 MPa·m1/2 or higher and the thermal conductivity of 90 W/m·K or higher can be attained.
    Type: Application
    Filed: April 14, 2006
    Publication date: February 12, 2009
    Applicant: Hitachi Metals, Ltd.
    Inventors: Youichirou Kaga, Hiromi Kikuchi, Hisayuki Imamura, Junichi Watanabe
  • Patent number: 7459105
    Abstract: A nanostructured monolithic titanium boride (TiB) material and methods of forming such a material are disclosed and described. This material has a room-temperature four-point flexural strength about three times that of commercially available titanium diboride (TiB2). The achievement of nanostructured internal microstructural arrangement having a network of interconnected titanium monoboride whiskers affords a very high strength to this material above some of the best ceramic materials available in the market. The material contains a small amount of titanium, but it is largely made of TiB phase with substantially no TiB2. The nanostructured monolithic titanium boride material can be formed by high temperature processing of a powder precursor having carefully selected weight and size distributions of titanium and titanium diboride powders. Potential applications of this material can include wear resistant components such as die inserts for extrusion dies, nozzles, armor, electrodes for metal refining etc.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: December 2, 2008
    Assignee: University of Utah Research Foundation
    Inventor: K. S. Ravi Chandran
  • Patent number: 7435304
    Abstract: There are provided a coating composition for siliconizing, and a method for manufacturing a high silicon electrical steel sheet using the same. The coating composition includes: a Fe—Si-based composite compound sintered powder having a grain size of ?325 mesh and containing 20-70% silicon by weight; and a colloidal silica solution containing 15-30 part by weight of silica solid matter with respect to 100 part by weight of the sintered powder.
    Type: Grant
    Filed: November 11, 2003
    Date of Patent: October 14, 2008
    Assignee: POSCO
    Inventors: Kyu-Seung Choi, Jong-Soo Woo
  • Patent number: 6899768
    Abstract: The present invention is related to a magnesium oxide particle aggregate with the requirement of a first inflection point diameter is more than 0.30×10?6 to 0.60×10?6 m, a particle void volume is 0.50×10?3 to 0.90×10?3 m3·kg?1, and a micropore volume is 0.04×10?3 to 0.11×10?3 m3·kg?1 in the cumulative intrusion volume curve of said particle by having controlled particle aggregation structure so that the solid phase-solid phase reaction between magnesium oxide and the SiO2 film on the surface can be appropriately controlled.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: May 31, 2005
    Assignee: Tateho Chemical Industries Co., Ltd.
    Inventors: Atsuo Toutsuka, Yutaka Hiratsu
  • Patent number: 6835250
    Abstract: An object of the present invention is to provide a magnesium oxide particle aggregate having a controlled particle aggregation structure so that the solid phase-solid phase reaction between magnesium oxide and the SiO2 film on the surface can be appropriately controlled. The object can be achieved by a magnesium oxide particle aggregate characterized in that a first inflection point diameter is 0.30×10−6 m or less, an interparticle void volume is 1.40×10−3 to 2.20×10−3 m3/kg and a particle void volume is 0.55×10−3 to 0.80×10−3 m3/kg in a cumulative intrusion volume curve of the particle aggregate.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: December 28, 2004
    Assignee: Tateho Chemical Industries Co., Ltd.
    Inventors: Yutaka Hiratsu, Toshio Kiyokawa, Atsuo Toutsuka
  • Publication number: 20040079444
    Abstract: Novel iron sulfides having excellent durability and excellent treating properties of heavy metals, processes for producing the iron sulfides, iron sulfide mixture, a heavy metal treating agent containing either of these novel iron sulfides as an effective component, and a method by which wastes containing various heavy metals are treated with the heavy metal treating agent are disclosed. The iron sulfide having a mackinawite structure which contains FeMxNySz wherein M represents an alkaline earth metal, N represents an alkali metal, and x, y and z, indicating the molar proportions of the respective elements, represent numbers satisfying 0.01<x≦0.5, y≦0.2 and 0.7≦z≦1.4, as an essential component.
    Type: Application
    Filed: September 24, 2003
    Publication date: April 29, 2004
    Applicant: TOSOH CORPORATION
    Inventors: Hajime Funakoshi, Mitsuru Takahashi
  • Publication number: 20040040627
    Abstract: The present invention is related to a magnesium oxide particle aggregate with the requirement of a first inflection point diameter is more than 0.30×10−6 to 0.60×10−6 m, a particle void volume is 0.50×10−3 to 0.90×10−3 m3·kg−1, and a micropore volume is 0.04×10−3 to 0.11×10−3 m3·kg−1 in the cumulative intrusion volume curve of said particle by having controlled particle aggregation structure so that the solid phase-solid phase reaction between magnesium oxide and the SiO2 film on the surface can be appropriately controlled.
    Type: Application
    Filed: April 24, 2003
    Publication date: March 4, 2004
    Inventors: Atsuo Toutsuka, Yutaka Hiratsu
  • Publication number: 20030188806
    Abstract: The present invention provides a method for producing a grain-oriented silicon steel sheet not having inorganic mineral films by using an annealing separator capable of preventing the inorganic mineral films composed of forsterite (Mg2SiO4), and so on, from forming during final annealing, comprising the steps of decarburization annealing followed by coating of annealing separator and final annealing, wherein alumina powder calcined at a calcination temperature of 900 to 1,400° C., or further having a BET specific surface area of 1 to 100 m2/g, an oil absorption of 1 to 70 ml/100 g, and/or having a gamma ratio of 0.001 to 2.0, is used as the annealing separator. Magnesia having a BET specific surface area of 0.5 to 5 m2/g may be added to said alumina powder.
    Type: Application
    Filed: December 20, 2002
    Publication date: October 9, 2003
    Inventors: Hiroyasu Fujii, Yoshiyuki Ushigami, Shuichi Nakamura, Kenichi Murakami, Norihiro Yamamoto, Kiyoshi Sawano, Shuichi Yamazaki
  • Publication number: 20030136467
    Abstract: An object of the present invention is to provide a magnesium oxide particle aggregate having a controlled particle aggregation structure so that the solid phase-solid phase reaction between magnesium oxide and the SiO2 film on the surface can be appropriately controlled. The object can be achieved by a magnesium oxide particle aggregate characterized in that a first inflection point diameter is 0.30×10−6 m or less, an interparticle void volume is 1.40×10−3 to 2.20×10−3 m3/kg and a particle void volume is 0.55×10−3 to 0.80×10−3 m3/kg in a cumulative intrusion volume curve of the particle aggregate.
    Type: Application
    Filed: October 29, 2002
    Publication date: July 24, 2003
    Inventors: Yutaka Hiratsu, Toshio Kiyokawa, Atsuo Toutsuka
  • Patent number: 6554609
    Abstract: Nanostructured non-stoichiometric non-equilibrium materials are disclosed. Novel electromagnetic materials and their applications are discussed. More specifically, the specifications teach the use of nanotechnology and nanostructured materials for developing novel electrical devices and products.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: April 29, 2003
    Assignee: NanoProducts Corporation
    Inventors: Tapesh Yadav, Roger Dirstine, John Alexander
  • Publication number: 20020104590
    Abstract: A method of treating a surface of a stacked aluminum alloy ingot during a heating process. Spacer blocks are positioned adjacent aluminum alloy ingots to form a stack, wherein the spacer block has a support surface contacting a contact surface of the aluminum alloy ingot, and at least one of the support surface and the contact surface include a fluorine containing material. The stack is heated to at least a temperature at which the fluorine containing material decomposes or vaporizes such that a layer of a fluorinated oxide compound is formed at the interfaces between the ingots and the spacer blocks.
    Type: Application
    Filed: December 13, 2000
    Publication date: August 8, 2002
    Inventors: Joseph P. Harenski, Roger W. Kaufold, Brian J. Morrissey, Robert L. Shadwick, Larry F. Wieserman
  • Publication number: 20020029826
    Abstract: Disclosed herein is a surface treatment agent for steel, characterized in that, said agent contains 0.1-15% by mass of chromium sulfate and 10-40% by mass of a binder resin containing butyral resin or a mixture of butyral resin with another resin which is compatible with butyral resin.
    Type: Application
    Filed: August 2, 2001
    Publication date: March 14, 2002
    Inventors: Hirofumi Kishikawa, Masato Yamashita, Atsumu Kanda, Hiroshi Ono
  • Publication number: 20010004048
    Abstract: A method for manufacturing a metal composite strip for the production of electrical contact components. A film made of tin or a tin alloy is first applied onto an initial material made of an electrically conductive base material. A film of silver is then deposited thereonto. Copper or a copper alloy is preferably used as the base material. The tin film can be applied in the molten state, and the silver film by electroplating. Furthermore, both the tin film and the silver film can be deposited by electroplating. A further alternative provides for manufacturing the tin film in the molten state and the silver film by cathodic sputtering. The diffusion operations which occur in the coating result in a homogeneous film of a tin-silver alloy. This formation can be assisted by way of a heat treatment of the composite strip.
    Type: Application
    Filed: January 30, 2001
    Publication date: June 21, 2001
    Inventors: Udo Adler, Klaus Schleicher
  • Patent number: 6074494
    Abstract: 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: Grant
    Filed: June 2, 1997
    Date of Patent: June 13, 2000
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyo Aluminium Kabushiki Kaisha
    Inventors: Hirohisa Miura, Yasuhiro Yamada, Haruzo Katoh
  • Patent number: 5685920
    Abstract: Disclosed is an annealing separator for production for grain-oriented electrical steel sheet, containing one or more compound selected from the following general formula;?Mg.sub.1-x M.sup.3+.sub.x !O ?Mg.sub.1-x M.sup.2+.sub.x !O or ?Mg.sub.1-x M.sup.2+.sub.x1 M.sup.3+.sub.x2 !OwhereM.sup.2+ is at least one bivalent element selected from the group consisting of Be, Ca, Ba, Sr, Sn, Mn, Fe, Co, Ni, Cu, Zn;M.sup.3+ is at least one tervalent element selected from the group consisting of Al, Fe, Cr, Co, B, Ti, Sb;0.01.ltoreq.x.ltoreq.0.40; x=x1+x2This annealing separator having a lower melting point and higher degree of reactivity is applied on the decarburization annealed strip, and improves the properties of the glass film, especially uniform film appearance and good sealing effect, and magnetic properties.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: November 11, 1997
    Assignee: Nippon Steel Corporation
    Inventors: Osamu Tanaka, Maremizu Ishibashi, Tsuyoshi Hamaya, Tsutomu Haratani, Tomoji Kumano, Koji Yamasaki, Akira Sakaida, Chihiro Sakurai, Hotaka Honma
  • Patent number: 5629251
    Abstract: A ceramic coating-forming agent of an Mg-M.sup.3+ -O based two-component oxide solid solution capable of forming a ceramic coating excellent in heat resistance, adhesion to a substrate metal, electric insulation and the properties of low thermal expansion, at a low temperature, the agent containing an Mg-M.sup.3+ -O based two-component oxide solid solution of the formula (1),(Mg.sub.1-x M.sup.2+.sub.x).sub.1-y M.sup.3+.sub.y O (1)wherein M.sup.2+ is at least one divalent metal selected from the group consisting of Ca.sup.2+, Mn.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cu.sup.2+ and Zn.sup.2+, M.sup.3+ is at least one trivalent metal selected from the group consisting of Al.sup.3+, Mn.sup.3+, Fe.sup.3+, Co.sup.3+, Ni.sup.3+, Ti.sup.3+, Bi.sup.3+ and Cr.sup.3+, x is a number in the range of 0.ltoreq.x<0.5 and y is a number in the range of 0<y<0.5, or an anionic oxide-dispersed Mg-M.sup.3+ -O based two-component oxide solid solution of the formula (2),(Mg.sub.1-x M.sup.2+.sub.x).sub.1-y M.sup.3+.sub.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: May 13, 1997
    Assignee: Kabushiki Kaisha Kaisui Kagaku Kankyujo
    Inventor: Shigeo Miyata
  • Patent number: 5453109
    Abstract: A method for the preparation of a salt mixture useful for hardening steel parts, including of potassium cyanate, potassium carbonate and sodium carbonate, wherein 2.2 to 2.3 moles of urea is first reacted with 1 mole of potassium carbonate to form potassium cyanate. The escaping ammonia is converted with formaldehyde into hexamethylenetetramine. The reaction product, which is potassium cyanate and potassium carbonate, is ground, mixed with powdered sodium carbonate and pressed at between 80.degree. and 230.degree. C. into shaped pieces.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: September 26, 1995
    Assignee: Durferrit GmbH Thermotechnik
    Inventors: Peter Schalke, Eberhard Mueller, Matthias Kremer, Georg Wahl
  • Patent number: 5364476
    Abstract: A variable gas generator is disclosed which is capable of producing a wide variety of product gas compositions heretofore produced only by either exothermic gas generators or endothermic gas generators or a combination of gas generators. The variable gas generator includes a nitrogen membrane module producing a nitrogen-oxygen feed gas which is combined with a hydrocarbon fuel and fed into a conventional endothermic gas generator. By controlling the nitrogen membrane module to produce a desired oxygen-nitrogen feed gas and by controlling the addition of methane and the catalyst bed temperature of the gas within the endothermic generator, a wide variety of product gas composition with carbon potential varying anywhere from one to 80% combustibles can be produced.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: November 15, 1994
    Assignee: Surface Combustion, Inc.
    Inventors: Ralph P. Poor, Michael J. Huber
  • Patent number: 5330813
    Abstract: A patch for preventing carburization, nitriding or oxidation comprises:a film comprising a heat-fusible or heat-meltable particulate material having an anti-carburizing, anti-nitriding or anti-oxidizing effect and a heat-decomposable resin as a binder; anda heat-resistant silicone pressure sensitive adhesive, which is decomposed at a carburizing, nitriding or oxidizing temperature, provided on one side of the film.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: July 19, 1994
    Assignee: Kabushiki Kaisha Nard Kenkyusho
    Inventors: Kouichi Hirooka, Kouichi Ito, Susumu Tanabe
  • Patent number: 5192373
    Abstract: Decarburized grain oriented silicon steel is provided with an annealing separator which forms a glass film after the final high temperature anneal. The magnesia used as the annealing separator has a total chlorine level of 0.01 to 0.20% by weight based on the weight of magnesia with at least 0.01% metal chloride selected from the group of Mg, Ca, Na and K. The chloride addition acts to seal the coating surface during the final anneal to control diffusion and stabilize the secondary grain growth. The glass film which forms during the anneal may be laser scribed for domain refinement without coating damage. The magnesia may also contain additions of phosphates, TiO.sub.2, SiO.sub.2, Cr and B. The temperature of the magnesia is maintained below 25.degree. C. to control hydration and eliminate the need for other additives in the magnesia slurry to control hydration.
    Type: Grant
    Filed: April 12, 1991
    Date of Patent: March 9, 1993
    Assignee: Armco, Inc.
    Inventors: Wade S. Wright, Robin A. Murphy
  • Patent number: 5173124
    Abstract: Increased cooling rate of an article heated to an elevated temperature is achieved by flowing an inert gas mixture of helium and another inert gas over the article under conditions of turbulent flow.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: December 22, 1992
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William J. Baxter, Paul T. Kilhefner, III, Charles E. Baukal, Jr.
  • Patent number: 5022935
    Abstract: A process for the deoxidation of a refractory metal containing minor concentrations of oxygen is disclosed. In this process the refractory metal is contacted with a metallic deoxidant in a dry, inert atmosphere. The metallic deoxidant and the refractory metal are heated to at least liquefy the metallic deoxidant and at least partially deoxidize the refractory metal. The refractory metal is thereafter cooled and contaminants on its surface are removed.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: June 11, 1991
    Assignee: RMI Titanium Company
    Inventor: Richard L. Fisher
  • Patent number: 5011548
    Abstract: For making a ductile boron-containing grain-oriented silicon steel, there is practiced, at a late stage in the making of the product either during the final texture anneal or a subsequent anneal, a high-temperature anneal in a reducing atmosphere with the use of a separating-agent coating, particularly magnesium oxide, which contains an effective amount of a compound of molybdenum and/or tungsten.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: April 30, 1991
    Assignee: Allegheny Ludlum Corporation
    Inventor: Douglas C. Dean
  • Patent number: 4810532
    Abstract: Hydrogenated boron-silicon alloy films having unexpected properties permitting in one embodiment the bonding together of metal and ceramic substrates by coating the surfaces to be bonded with the film mating the surfaces and heat treating the mated surfaces to expell hydrogen therefrom and to react to resulting boron-silicon alloy film with the substrates to form a liquid reaction product which forms a surface bond with the substrates or is at least partially absorbed in the substrates. In another embodiment, at least one surface of an intermetallic compound formed from elements selected from groups III and V of the periodic table is sealed against structural degradation by forming on the surface a solid boron-silicon-hydrogen alloy film. In still another embodiment, metal and organic resin substrates are protected against attack by water vapor, dissociated oxygen and molecular oxygen by forming a solid boron-silicon-hydrogen alloy film on the substrates.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: March 7, 1989
    Assignee: Lockheed Missiles & Space Company, Inc.
    Inventors: Henry W. Lavendel, John C. Robinson
  • Patent number: 4775430
    Abstract: For improving the properties of a glass film on a grain-oriented electrical steel sheet, the annealing separator applied on a decarburized steel sheet is prepared by: calcining at a high temperature to reduce the activity thereof; hydrating only on the outermost layer of MgO particles; and adding a Ti, B, or S compound to MgO.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: October 4, 1988
    Assignee: Nippon Steel Corporation
    Inventors: Osamu Tanaka, Hiroshi Sato
  • Patent number: 4746376
    Abstract: A method and composition for stopping-off nitrogen and/or carbon diffusion into metal surfaces. The composition, which is a mixture of a refractory material selected from the group of zirconium and aluminosilicate, sodium silicofluoride and sodium silicate, is coated onto the metal surface where diffusion is to be prevented. The mixture is cured and the metal part is subjected to elevated temperatures for carburizing, nitriding, or carbonitriding. The coating prevents nitrogen and/or carbon diffusion at the coated area. After treatment the coating is removed.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: May 24, 1988
    Assignee: Kolene Corporation
    Inventor: Charles M. Bessey
  • Patent number: 4666535
    Abstract: A method is provided for improving core-loss values of grain-oriented silicon steel after final texture annealing by boronizing the steel to levels of 0.001 to 0.009 wt. % after applying a boron-containing material to the final texture annealed steel, heating to 1850.degree. to 2200.degree. F., maintaining the steel at such temperature to infuse boron into other steel, and cooling the steel at a rate of 100.degree. F./hour or less.
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: May 19, 1987
    Assignee: Allegheny Ludlum Corporation
    Inventor: James G. Benford
  • Patent number: 4647318
    Abstract: A method of solution heat treating aluminum alloys, especially aluminum-lithium alloys, by immersing the alloy article in a chloride based neutral salt bath rather than in the conventionally used nitrate based salt bath. A chloride based bath, at least in certain controlled situations, produces an effective solution heat treatment but without the staining and corrosive reaction often encountered with the nitrate based salt baths. A chloride based salt comprising 55% potassium chloride, 40% lithium chloride, and 5% sodium chloride is found to be particularly effective.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: March 3, 1987
    Inventor: Robert W. Foreman
  • Patent number: 4632708
    Abstract: An annealing separator used in a finishing annealing step for producing a grain-oriented electrical steel sheet usually contains magnesia. The present invention is characterized by including, based on 100 parts by weight of magnesia, from 0.2 to 20 parts by weight of ferromanganese nitride or manganese nitride which consists of a composition (Mn.sub.1-x Fe.sub.x)N.sub.y having x and y values corresponding to A, B, C, and D and falling within a region surrounded by A, B, C, and D shown in the appended FIG. 1.The annealing separator according to the present invention is effective for stabilizing secondary recrystallization and improving the properties of a forsterite film.
    Type: Grant
    Filed: April 4, 1986
    Date of Patent: December 30, 1986
    Assignee: Nippon Steel Corporation
    Inventors: Toyohiko Konno, Yozo Suga, Motoharu Nakamura, Hajime Komatsu
  • Patent number: 4595425
    Abstract: An organic polymer containing composition suitable for use as a quenchant having incorporated therein a non-nitrite inhibitor system, which comprises an aromatic compound having at least one substituent nitro group and/or the water soluble organic or inorganic salt thereof and a hydroxy substituted mono aromatic carboxylic acid and/or the water soluble organic or inorganic salt thereof. In another embodiment a pH adjustment agent capable of providing an initial pH of at least 7.5 is also present.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: June 17, 1986
    Assignee: Union Carbide Corporation
    Inventor: Ronald H. Harding
  • Patent number: 4591397
    Abstract: A non-cyanide molten salt bath composition and process for the carburization of objects made of ferrous metals or alloys are provided. The composition comprises a molten salt mixture, at a temperature in the range of 900.degree. C. to 1050.degree. C., of an alkali metal chloride or a mixture of alkali metal chlorides; an activator consisting of an oxygen containing strontium or barium salt; and a graphite cover. The process comprises immersing the ferrous metal or alloy part in the molten mixture at a temperature in the range of 900.degree. C. to 1050.degree. C.
    Type: Grant
    Filed: February 26, 1985
    Date of Patent: May 27, 1986
    Assignee: Heatbath Corporation
    Inventors: William C. Jones, Kenneth R. Britt, Isaac L. Newell
  • Patent number: 4582547
    Abstract: A method for producing an annealing separator coating on grain oriented silicon steel prior to final texture annealing to improve the coating uniformity and prevent oxidation of the steel surface during this annealing operation. The method comprises coating the steel with a conventional coating, such as magnesium oxide, having an addition of an inert, high temperature refractory annealing separator agent, preferably calcined alumina.An annealing separator composition is also provided.
    Type: Grant
    Filed: May 7, 1984
    Date of Patent: April 15, 1986
    Assignee: Allegheny Ludlum Steel Corporation
    Inventor: LeRoy R. Price
  • Patent number: 4571273
    Abstract: In a process of heating and cooling charges in batch-process industrial furnaces, particularly in a process of cooling coils of steel wire or strip steel in bell-type annealing furnaces, the charge is heated and cooled in contact with circulated protective gas. The cooling time is shortened and the power input to the circulating fan is reduced by changing the composition of the protective gas so as to decrease the specific gravity of the protective gas just before the beginning of the cooling period and/or during the cooling period.
    Type: Grant
    Filed: June 26, 1984
    Date of Patent: February 18, 1986
    Assignee: Ebner-Industrieofenbau Ing. Josef Ebner KG
    Inventor: Peter Ebner
  • Patent number: 4543134
    Abstract: The present invention provides an annealing separator comprising from 0.05 to 2.0 parts by weight of antimony sulfate based on 100 parts by weight of magnesium oxide, and at least one chloride selected from the group consisting of Sb, Sr, Ti, and Zr chlorides in a chlorine amount of from 5 to 20% by weight based on 100% of the chloride and antimony sulfate, and occasionally comprises Ti oxide in an amount of from 0.5 to 10 parts.The annealing separator is applied on the decarburization annealed strip, and improves both the magnetic properties and properties of glass film, in the production of a grain-oriented electrical steel sheet.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: September 24, 1985
    Assignee: Nippon Steel Corporation
    Inventors: Osamu Tanaka, Shozaburo Nakashima, Takashi Nagano, Tomoji Kumano, Yoshitaka Hiromae
  • Patent number: 4539053
    Abstract: A pack composition is disclosed for case hardening a ferrous metal to initially diffuse boron into the surface thereof and subsequently diffuse boron and silicon into the surface thereof. The pack composition comprises an amorphous boron, a silicon material, an alkyli earth, and a carbon bearing compound with the last named compound including a barium carbonate, a calcium carbonate and a hardwood charcoal and coke mixture.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: September 3, 1985
    Assignee: Dresser Industries, Inc.
    Inventor: William L. Aves, Jr.
  • Patent number: 4533403
    Abstract: A pack composition is disclosed for case hardening a ferrous metal to initially diffuse carbon into the surface thereof and subsequently diffuse boron into the surface. The pack composition comprises a boron material and a carburizing compound with the last named compound including a barium carbonate, a calcium carbonate and a hardwood charcoal and coke mixture.
    Type: Grant
    Filed: September 17, 1984
    Date of Patent: August 6, 1985
    Assignee: Dresser Industries, Inc.
    Inventors: William L. Aves, Jr., Gary A. Aves
  • Patent number: 4509993
    Abstract: It is known to regenerate salt baths for nitriding parts of iron and steel with polymers of organic materials, which polymers, however, could not be used in carburizing salt baths since with them there only are formed slight amounts of carburizing active cyanide, the baths foam, and carbon residues are formed. An excellent regeneration agent for carburizing salt baths is obtained by using polymeric organic compounds of the overall composition [C.sub.6 H.sub.x N.sub.y ].sub.z where x is 3 to 5, y is 5 to 8, and z is 10 to 10,000. These compounds are obtained by reacting formaldehyde with cyanamide and/or dicyandiamide and/or melamine and pyrolytically decomposing the reaction product at 300.degree. to 600.degree. C.
    Type: Grant
    Filed: December 29, 1983
    Date of Patent: April 9, 1985
    Assignee: Degussa Aktiengesellschaft
    Inventors: Hans-Hermann Beyer, Ulrich Baudis, Peter Biberbach
  • Patent number: 4473412
    Abstract: A process for annealing steel strip comprising dipping the strip in a molten glass bath maintained 950.degree. C. or higher to anneal it, taking the strip out of the bath to form coagulated glass coatings on the surfaces of the strip and cooling the strip to destroy and peel off the coatings. The bath comprises 38.0 to 62.0% of B.sub.2 O.sub.3, 18.0 to 32.0% of SiO.sub.2, 18.0 to 32.0% of Na.sub.2 O partly replaceable with K.sub.2 O, up to 10.0% of CaO partly replaceable with MgO, BaO, ZnO and/or SrO, up to 6.0% of Li.sub.2 O, up to 10.0% of Al.sub.2 O.sub.3 and 0.5 to 4.0% of NaF, and has a viscosity not exceeding 200 poises as measured at 950.degree. C. The strip is preferably not exposed to air while above 400.degree. C.
    Type: Grant
    Filed: February 4, 1983
    Date of Patent: September 25, 1984
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Shigeaki Maruhashi, Takayoshi Kanamaru, Hiroto Matsumoto, Kousuke Sawashige
  • Patent number: 4457788
    Abstract: This invention relates to non-abrasive, lubricative, particulate solids, e.g. graphites, lime, calcium oxides, zinc oxides and compounds of higher saturated fatty acids, particularly, stearate salts, and their methods of use as fluidized bed media for preventing clinging and related carryover problems. Preferably, fluidized bed media, selected in accordance with this invention, have a beneficial effect on subsequent process operations.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: July 3, 1984
    Assignee: Procedyne Corp.
    Inventors: Herbert K. Staffin, Robert Staffin
  • Patent number: 4441937
    Abstract: Bath for the quenching of ferrous and nonferrous metals and their alloys, comprising a hydrogenated starch hydrolysate having, expressed with respect to the dry matter, a percentage of products of degree of polymerization 1 and 2 comprised between 1 and 90, the complement to 100 being constituted by products of degree of polymerization equal to or higher than 3.
    Type: Grant
    Filed: July 20, 1983
    Date of Patent: April 10, 1984
    Assignee: Roquette Freres
    Inventors: Serge Gosset, Michael Huchett
  • Patent number: 4396439
    Abstract: A method is provided for the recovery and recycle of nitrate and nitrite salts present in environmentally hazardous chloride containing quench bath solids, comprising the steps of leaching the solids with hot water to provide an aqueous leachate that depletes the hot water soluble content of the solids, clearing the resulting aqueous leachate of solids, and recycling it while hot into a fused quench bath.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: August 2, 1983
    Assignee: Park Chemical Company
    Inventor: Robert W. Foreman
  • Patent number: 4367100
    Abstract: A process for producing grain oriented electromagnetic silicon steel. The process includes the steps of: preparing a melt of silicon steel having, by weight, from 2.5 to 4.0% silicon; casting the steel; hot rolling the steel; cold rolling the steel; decarburizing the steel; applying a substantially non-reactive aluminum hydroxide coating to the steel; and final texture annealing the steel. The annealed steel being characterized by a substantially uniform metallic surface.
    Type: Grant
    Filed: October 15, 1979
    Date of Patent: January 4, 1983
    Assignee: Allegheny Ludlum Steel Corporation
    Inventor: Clarence L. Miller, Jr.