Vacuum Patents (Class 419/60)
  • Patent number: 4521248
    Abstract: A process for producing titanium nitride base cermet with a high toughness comprises the steps of:admixing 0.5 to 10 parts by volume of a carbon powder with a cermet material powder in an amount of 100 parts by volume based on nitrides in the cermet material powder, the cermet material powder essentially consisting of, by weight, 40 to 93% TiN, 2 to 15% of one or more selected from the group consisting of metals of the Group VIa of the periodic table and carbides thereof, 4.7 to 35% of iron group metal, and 0.3 to 10% of AlN with the balance being inevitable impurities,compacting and sintering whereby when the compact is sintered, said AlN is substantially decomposed.TiN may be partly replaced with carbides and/or carbonitrides of metals of the Groups IVa and Va of the periodic Table.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: June 4, 1985
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Yoshihiro Yamamoto, Junichiro Suzuki, Minoru Nakamura
  • Patent number: 4519839
    Abstract: A sintered high vanadium high speed steel with an excellent hardness and ductility of composition C 1.4-6.2%, W+2 Mo (W-equivalent) 10.0-24.0%, Cr 3.0-6.0%, V 8.5-28%, Co less than 17%, the remainder Fe and inevitable impurities, and a method of producing same.It can be produced by the steps of commingling the alloy constituents in the form of pulverulent oxides and carbon powder, heating the mixture in a stream of hydrogen, thereby reducing the mixture by the carbon and hydrogen simultaneously to yield an alloy powder, adjusting the composition and the grain size of the obtained alloy powder, pressing the alloy powder to a compact, sintered the compact in a vacuum, and finally converting the matrix of the sintered body into martensite by heat treatment.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: May 28, 1985
    Assignees: The Furukawa Electric Co., Ltd., Kanto Denka Kogyo Co., Ltd., Fujidie Co., Ltd.
    Inventors: Ishibachi Toyoaki, Yoshihara Minoru, Takuma Takashi, Fuke Yasunori, Maeda Masayuki
  • Patent number: 4481166
    Abstract: A wear-resistant hard metal free of tungsten carbide. The hard metal comprises: molybdenum carbide; a carbide of another transition metal; boron, boron nitride, boron carbide, or a mixture thereof, in an amount of 0.1 to 1% by weight boron, based on the weight of the molybdenum carbide, other transition metal carbide and boron-containing material, and a binder metal selected from the group consisting of metals of the iron group of the Periodic Table of Elements, and alloys thereof.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: November 6, 1984
    Assignee: Kernforschungszentrum Karlsruhe GmbH
    Inventors: Helmut Holleck, Fritz Thuemmler, Leo Prakash
  • Patent number: 4468719
    Abstract: A porous body of Ti-Al alloy has a novel structure for a solid electrolytic capacitor, having improved values of leakage current and dielectric loss. The porous body of Ti-Al alloy has spherical particles which partially contact each other to form an integral body. The surfaces of the spherical particles have a ruggedness in the order of several microns or less. Because the diameter of the spherical particle is greater than the size of the ruggedness, the porous body has rough voids which provide a wide passageway through which a manganese nitrate solution penetrates. The wide passageway is effective for decreasing the number of times when there is a thermal decomposition of the manganese nitrate, thereby reducing the series resistance of the resultant cathode. In addition, this novel structure makes it possible to avoid production difficulties which are usually encountered when a solid electrolytic capacitor, having a high capacitance, is produced from a finely divided Ti-Al alloy.
    Type: Grant
    Filed: April 2, 1981
    Date of Patent: August 28, 1984
    Assignee: Nippon Electric Co., Ltd.
    Inventors: Shigeaki Shimizu, Yoshimi Kubo, Tetsuo Suzuki, Takashi Kizaki, Hitoshi Igarashi
  • Patent number: 4464199
    Abstract: Aluminum alloy atomized powder containing 4 to 15% iron and 1 to 12% cerium or other rare earth metal, when properly compacted and shaped into a useful article, exhibits very high strength at relatively high temperatures. The iron content exceeds the cerium or rare earth metal content, and the powder may contain refractory elements such as W, Mo and others. The powder is produced by atomizing alloyed molten aluminum, preferably in a nonoxidizing atmosphere, and is compacted to a density approaching 100% under controlled conditions including controlled temperature conditions. The alloy may be subsequently shaped by conventional forging, extruding or rolling processes.
    Type: Grant
    Filed: January 20, 1983
    Date of Patent: August 7, 1984
    Assignee: Aluminum Company of America
    Inventors: Gregory J. Hildeman, Robert E. Sanders, Jr.
  • Patent number: 4435213
    Abstract: Aluminum alloy atomized or other powder is compacted and shaped into a useful article including heating the compact rapidly by induction heating techniques. Such rapid induction heating results in improved strength or toughness properties without substantial penalty in elongation, thereby rendering the product so produced more useful in high strength applications. The product so produced may be subsequently shaped by forging, extruding or rolling processes.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: March 6, 1984
    Assignee: Aluminum Company of America
    Inventors: Gregory J. Hildeman, John C. Kuli, Jr., Leo A. Vivola
  • Patent number: 4414028
    Abstract: A particulate mass to be sintered is imbedded in a mold which comprises a porous mass of particulate refractory material enclosed within a flexible membrane. Six press units are provided for applying compressive pressures externally to the mold, together or in sequence, whereby to subject the sinterable mass to pressures in the respective directions, under the control of a preprogrammed control unit which receives clock pulses from a source and stimulates the respective press units. A flexible heating coil imbedded in the mold is supplied with alternating current from a source to inductively heat up the sinterable mass and the adjacent mold material, to enable sintering to occur. The sinterable mass may have been precompacted into a self-supporting so-called "green compact", or it may be supported in a self-supporting shell carried within and forming part of the mold. The mold preferably comprises three layers having characteristics chosen so as to assist in heating up the sinterable mass uniformly.
    Type: Grant
    Filed: April 8, 1980
    Date of Patent: November 8, 1983
    Assignee: Inoue-Japax Research Incorporated
    Inventor: Kiyoshi Inoue
  • Patent number: 4385944
    Abstract: A method for making magnetic crystallized implements based on glassy metal alloys. Metallic glass alloy powder of suitable ferromagnetic composition is compacted by mechanical, by adhesive bonding or by thermomechanical processes. The resulting compacts can be heat treated to enhance magnetic properties. Compacted bodies exhibit excellent ferromagnetic properties, low remanence, low coercivity and high permeabilities.
    Type: Grant
    Filed: May 29, 1980
    Date of Patent: May 31, 1983
    Assignee: Allied Corporation
    Inventor: Ryusuke Hasegawa
  • Patent number: 4379719
    Abstract: Aluminum alloy atomized powder containing 4 to 12% iron and 1 to 7% cerium or other rare earth metal, when properly compacted and shaped into a useful article, exhibits very high strength at relatively high temperatures. The iron content exceeds the cerium or rare earth metal content, and the powder may contain refractory elements such as W, Mo and others. The powder is produced by atomizing alloyed molten aluminum, preferably in a nonoxidizing atmosphere, and is compacted to a density approaching 100% under controlled conditions including controlled temperature conditions. The alloy may be subsequently shaped by conventional forging, extruding or rolling processes.
    Type: Grant
    Filed: November 20, 1981
    Date of Patent: April 12, 1983
    Assignee: Aluminum Company of America
    Inventors: Gregory J. Hildeman, Robert E. Sanders, Jr.
  • Patent number: 4369075
    Abstract: This invention relates to a process for manufacturing R.sub.2 Co.sub.17 system permanent magnet alloys of rare earth(R)-cobalt(Co) intermetallic compounds. Sm.sub.2 Co.sub.17 alloy, in which R is samarium (Sm) with respect to intermetallic compounds whose stoichiometric composition is R.sub.2 Co.sub.17, possesses high saturation magnetization and high Curie temperature making it possible to obtain a high energy product. However, its permanent magnetization has not been practiced much at all because coercive force could not be obtained. This invention practices heat aging for 0.5-200 hours at 700.degree.-800.degree. C. in the heat treatment process of the sintered material of R.sub.2 (Co,Fe,M).sub.17 system (M is one or more than one elements of Ti, Cr, Mn, Ni, Cu, Zr, Nb, Hf, Ta, and W) and the coercive force is increased by carrying out this process in a magnetic field to achieve permanent magnetization.
    Type: Grant
    Filed: December 18, 1980
    Date of Patent: January 18, 1983
    Assignee: Namiki Precision Jewel Co., Ltd.
    Inventors: Imaizumi Nobuo, Aoe Masahiro