Chromium Containing Patents (Class 420/436)
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Patent number: 5238481Abstract: A heat-resistant sintered hard alloy comprises 35% to 95% by weight of a WCoB type complex boride in a cobalt base alloy. The alloy contains 1.5% to 4.1% boron, 19.1% to 69.7% tungsten, optionally to 25% chromium, the balance being cobalt and a maximum of 1% impurities. Nickel, iron and/or copper may be substituted for portions of the cobalt content.Type: GrantFiled: January 23, 1992Date of Patent: August 24, 1993Assignee: Toyo Kohan Co., Ltd.Inventors: Kenichi Takagi, Masao Komai, Yoshihiko Isobe
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Patent number: 5227131Abstract: A metal alloy for cast prosthetic frames in dentistry, consisting of (in % by weight)______________________________________ 0.1 to 0.3 % C up to 1.5 % Si up to 3 % Mn 25 to 35 % Cr 3 to 6.5 % Mo 0.5 to 5 % Ta 0.15 to 0.40 % N ______________________________________remainder cobalt and residual impurities.Type: GrantFiled: September 11, 1991Date of Patent: July 13, 1993Assignee: Thyssen Stahl AktiengesellschaftInventor: Hans-Hermann Weigand
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Patent number: 5182080Abstract: A cobalt base, high temperature brazing alloy having a composition, by weight of:______________________________________ Nickel from about 8.5% to about 12.5% Chromium from about 24% to about 40% Tungsten from about 0% to about 9% Carbon from about 0.03% to about 0.6% Boron from about 0.01% to about 3.5% Silicon from about 1.0% to about 11% Manganese up to about 2% Cobalt Balance ______________________________________is provided for use in the repair of Co-base turbine component superalloys.Type: GrantFiled: December 27, 1990Date of Patent: January 26, 1993Assignee: General Electric CompanyInventors: Adrian M. Beltran, Charles H. Kreischer
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Patent number: 5154885Abstract: A protective coating for metal components formed of nickel or cobalt-based superalloys essentially consists of the following constituents (in percentages by weight):1 to 20% rhenium,22 to 50% chromium,0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%,0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and0 to 3% silicon,impurities, as well as the following elective components:0 to 5% hafnium,0 to 12% tungsten,0 to 10% manganese,0 to 15% tantalum,0 to 5% titanium,0 to 4% niobium, and0 to 2% zirconium,the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.Type: GrantFiled: August 10, 1990Date of Patent: October 13, 1992Assignee: Siemens AktiengesellschaftInventors: Norbert Czech, Friedhelm Schmitz
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Patent number: 5151137Abstract: A magnetic alloy with ultrafine crystal grains having a composition represented by the general formula:Co.sub.100.sub.-x-y-z-a-b Fe.sub.a M.sub.x B.sub.y X.sub.z T.sub.b (atomic %)wherein M represents at least one element selected from Ti, Zr, Hf, V, Nb, Mo, Ta, Cr, W and Mn, X represents at least one element selected from Si, Ge, P, Ga, Al and N, T represents at least one element selected from Cu, Ag, Au, platinum group elements, Ni, Sn, Be, Mg, Ca, Sr and Ba, 0<a.ltoreq.30, 2.ltoreq.x.ltoreq.15, 10.ltoreq.y.ltoreq.25, 0.ltoreq.z.ltoreq.10, 0<b.ltoreq.10, and 12<x+y+z+b.ltoreq.35. Such a magnetic alloy can be produced by producing an amorphous alloy having the above composition, and subjecting the resulting amorphous alloy to a heat treatment to cause crystallization, thereby providing the resulting alloy having a structure, at least 50% of which is occupied by crystal grains having an average grain size of 500 .ANG. or less.Type: GrantFiled: November 16, 1990Date of Patent: September 29, 1992Assignee: Hitachi Metals Ltd.Inventors: Yoshihito Yoshizawa, Yoshio Bizen, Kiyotaka Yamauchi, Toshikazu Nishiyama, Shigekazu Suwabe
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Patent number: 5139738Abstract: A corrosion resistant filler weld alloy is provided for use in repairing a preselected article alloy of predetermined composition range at a temperature equal to or greater than the incipient melting temperature of the article alloy, the filler weld alloy having a composition, by weight of:Chromium--from about 20% to about 48%Nickel--about 20%Tungsten--from about 0% to about 4%Carbon--about 0.1%Silicon--about 0.9%Manganese--about 0.6%Tantalum--from about 0% to about 3.5%Titanium--from about 1% to about 2.25%Cobalt--Balance.Type: GrantFiled: December 18, 1990Date of Patent: August 18, 1992Assignee: General Electric CompanyInventors: Adrian M. Beltran, James J. Frawley
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Patent number: 5114503Abstract: A magnetic core comprised of an amorphous alloy ribbon wound into a toroidal shape, wherein the said amorphous alloy has a composition of the formula:(Co.sub.1-x-y-z Fe.sub.x Ni.sub.y Mn.sub.z).sub.100-a-b-c M.sub.a Si.sub.b B.sub.cwherein M is at least one element selected from the group consisting of Nb, Cr and Mo, and x, y, z, a, b and c are numbers which satisfy relations of 0<a.ltoreq.6, 13.ltoreq.b.ltoreq.16, 7.ltoreq.b.ltoreq.10, 0<x.ltoreq.0.1, 0.ltoreq.y.ltoreq.0.2 and 0.ltoreq.x.ltoreq.0.13 respectively, said amorphous alloy after heat treatment having a rectangular ratio Br/Bs of at least 80%, a Bs value in a range of 5 KG to 8 KG and a stress relief ratio of at least 75%.Type: GrantFiled: March 24, 1987Date of Patent: May 19, 1992Assignee: Hitachi Metals, Inc.Inventors: Yoshihito Yoshizawa, Kiyotaka Yamauchi
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Patent number: 5112468Abstract: Targets for magnetron - sputtering systems with a high utilization of material are obtained from ferromagnetic alloys if the amount of hexagonal structural phase is greater than the cubic phase portion and if the hexagonal prism axis (0001) is aligned preferably vertically to the target surface.Type: GrantFiled: February 4, 1991Date of Patent: May 12, 1992Assignee: Degussa AGInventors: Martin Weigert, Lorenz Berchtold, Stephan U. Schittny
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Patent number: 5084795Abstract: A metal-in-gap type magnetic head having a small undulation of reproduction output caused by a pseudo-gap and method of manufacture thereof are provided, wherein the magnetic head employs as a back core a ferrite (particularly, a ferrite containing Sn) and employs in a metal portion which constitutes a front core an alloy film (particularly, a composition transition alloy film) having a composition expressed by T-M-X-N, where T is at least one metal element selected from a group consisting of Fe, Co and Ni, M is at least one metal element selected from a group consisting of Nb, Zr, Ti, Ta, Hf, Cr, Mo, W and Mn, X is at least one metalloid element selected from a group consisting of B, Si and Ge, and N is nitrogen.Type: GrantFiled: February 5, 1990Date of Patent: January 28, 1992Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Sakakima, Keita Ihara, Koichi Osano
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Patent number: 5069872Abstract: An improved cutting tool is provided, especially useful for hand shears. The cutting edge of the tool is made of a wear-resistant material of either: (a) 85% to 96% tungsten carbide and 15% to 4% cobalt, (b) 60% to 89% tungsten carbide, 4% to 28% tantalum carbide, 4% to 25% titanium carbide and 3% to 30% cobalt, or (c) 34% to 51% cobalt, 25% to 32% chromium, 14% to 21% tungsten, 2% to 4% carbon and one or more of the metals nickel, silicon, columbium, manganese and iron which, together, comprise no more than 16% of the material. For material "b", preferably the composition contains about 5% to 13% cobalt, 65% to 89% tungsten carbide, titanium carbide and tantalum carbide which, together, are present in an amount no greater than 30% of the composition of the material.Type: GrantFiled: September 8, 1989Date of Patent: December 3, 1991Inventor: Frank J. Penoza
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Patent number: 5066459Abstract: A cobalt base, high temperature brazing alloy having a composition, by weight of:______________________________________ Nickel from about 8.5% to about 12.5% Chromium from about 24% to about 40% Tungsten from about 0% to about 9% Carbon from about 0.03% to about 0.6% Boron from about 0.01% to about 3.5% Silicon from about 0.1% to about 11% Manganese up to about 2% Hafnium from about 0.1% to about 3% Tantalum from about 0.1% to about 8% Zirconium from about 0% to about 1% Titanium from 0% to about 1% Cobalt Balance ______________________________________is provided for use in the repair of Co-base turbine component superalloys.Type: GrantFiled: May 18, 1990Date of Patent: November 19, 1991Assignee: General Electric CompanyInventors: Adrian M. Beltran, Charles H. Kreischer
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Patent number: 5039574Abstract: The invention concerns a ceramically coated dental prosthesis in which the metal frame comprises an alloy containing, each in percent by weight: 0 to 0.4 carbon, 0.1 to 5.0 silicon, 0.01 to 8.0 manganese, 25 to 35 chromium, 1.0 to 8.0 molybdenum, 0.1 to 5 niobium, 0 to 0.3 nickel, 0 to 1.0 iron, the remainder being cobalt and impurities resulting from manufacturing conditions.Type: GrantFiled: September 14, 1987Date of Patent: August 13, 1991Assignee: Vereinigte Edelstahlwerke AGInventor: Alfred Kulmburg
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Patent number: 5002731Abstract: Disclosed is a cobalt-base alloy that has a valuable combination of both corrosion- and wear-resistant properties. The alloy nominally contains, in percent by weight, 25.5 chromium, 8.5 nickel, 3.0 iron, 5 molybdenum, 2 tungsten, 0.40 silicon, 0.75 manganese, 0.06 carbon, 0.08 nitrogen and the balance cobalt plus normal impurities normally found in alloys of this class. The alloy may also contain copper and certain "carbide formers" (i.e., columbium, tantalum, titanium, vanadium and the like) to tie up excess carbon and/or nitrogen that may be present.Type: GrantFiled: April 17, 1989Date of Patent: March 26, 1991Assignee: Haynes International, Inc.Inventors: Paul Crook, Aziz I. Asphahani, Steven J. Matthews
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Patent number: 4938267Abstract: A series of glassy metal alloys with near zero magnetostriction and Perminvar characteristics of relatively constant permeability at low magnetic field excitations and constricted hysteresis loops is disclosed. The glassy alloys have the compositions Co.sub.a Fe.sub.b Ni.sub.c M.sub.d B.sub.e Si.sub.f where M is at least one member selected from the group consisting of Cr, Mo, Mn and Nb, and "a-f" are in atom percent where "a" ranges from about 66 to 71, "b" ranges from about 2.5 to 4.5, "c" ranges from about 0 to 3, "d" ranges from about 0 to 2 except when M.dbd.Mn in which case "d" ranges from about 0 to 4, "e" ranges from about 6 to 24 and "f" ranges from about 0 to 19, with the proviso that the sum of "a", "b" and "c" ranges from about 72 to 76 and the sum of "e" and "f" ranges from about 25 to 27. The glassy alloy has a value of magnetostriction ranging from about -1.times.10.sup. -6 to about +1.times.10.sup.-6, a saturation induction ranging from about 0.Type: GrantFiled: August 18, 1988Date of Patent: July 3, 1990Assignee: Allied-Signal Inc.Inventor: Ryusuke Hasegawa
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Patent number: 4904290Abstract: Cobalt based alloys which include chromium, nickel, tungsten, tantalum, zirconium, carbon and boron are provided which are suitable for forming spinners to be used in forming glass fibers. The alloys contain critically important amounts of carbon which maximizes the stress rupture life of the spinner alloy and minimizes the creep rate thereby making the alloy outstandingly adapted for glass manufacture.Type: GrantFiled: September 30, 1988Date of Patent: February 27, 1990Assignee: Owens-Corning Fiberglas CorporationInventors: David J. Gaul, Dennis L. McGarry
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Patent number: 4891183Abstract: A method of improving the elevated temperature oxidation resistance of non-iron base alloys, especially nickel and cobalt base alloys by the addition of dopants to the oxide scale formed on a broad range of non-iron base alloys such as wrought or cast nickel or cobalt base heat resistant alloys.Type: GrantFiled: December 3, 1986Date of Patent: January 2, 1990Assignee: Chrysler Motors CorporationInventor: John M. Corwin
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Patent number: 4863526Abstract: A fine crystalline thin wire of a cobalt base alloy having a composition of the formula;CokMlBmSinwhere Co is cobalt; M is at least one of the transition metals of groups IV, V and VI of the periodic table; B is boron; Si is silicon; K, l, m and n represent atom percent of Co, M, B and Si, respectively, and have the following values:k=40-78l=10-50m=2-15n=8-20and the fine crystal grains in the thin wire having an average size of no more than 5 .mu.m.Type: GrantFiled: July 10, 1987Date of Patent: September 5, 1989Assignee: Pilot Man-Nen-Hitsu Kabushiki KaishaInventors: Yukio Miyagawa, Zenzo Kitayama, Ikuo Ishiguro, Yoshimasa Suzuki
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Patent number: 4842657Abstract: Amorphous alloys containing zirconium as an amorphus forming metal and having the formula X.sub..alpha. Z.sub..gamma. wherein X is at least one of Fe, Co and Ni, .alpha. is 80 to 92 atomic %, Z is zirconium, .gamma. is 8 to 20 atomic % and the sum of .alpha. and .gamma. is 100 atomic %, cause very little variation of properties during aging and embrittlement because they contain no metalloid as the amorphous forming element, and they further have excellent strength, hardness, corrosion resistance and heat resistance and maintain superior magnetic properties which are characteristic of iron group elements.Type: GrantFiled: December 5, 1980Date of Patent: June 27, 1989Assignee: Shin-Gijutsu Kaihatsu JigyodanInventors: Tsuyoshi Masumoto, Kiyoyuki Esashi, Masateru Nose
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Patent number: 4837389Abstract: A dimensional composition, a dimensionally restored alloy structure and a method of dimensionally restoring gas turbine and the like components that will be subsequently coated which includes low-pressure plasma spraying onto a damaged vane or other components, an alloy composition consisting essentially by weight of 1 to 4% aluminum, 0 to 1.5% hafnium and 0 to 20% nickel in the base composition of the cobalt alloy component, grinding to final dimension and diffusion coating. Tantalum is substituted for columbium where the base composition of the alloy contains columbium.Type: GrantFiled: June 4, 1984Date of Patent: June 6, 1989Assignee: Turbine Components CorporationInventors: Srinivasan Shankar, George W. Goward
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Patent number: 4830824Abstract: An alloy for producing dental castings comprises 26.5 to 27.5% Cr, 4.5 to 5.5% Mo, 0.65 to 0.8% Mn, 0.4 to 0.5% Si, up to 1% Fe, up to 0.05% C, and the balance Co.Type: GrantFiled: March 19, 1987Date of Patent: May 16, 1989Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventor: Jurgen Lindigkeit
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Patent number: 4822567Abstract: Antibiotic alloys adapted for making sanitary articles, such as orthodontic fittings and component parts of water purifying apparatus, the alloy containing cobalt to impart an antibiotic ability hereto, and iron and nickel to enhance the workability thereof so that the alloy can be easily worked into intricate shapes.Type: GrantFiled: October 29, 1987Date of Patent: April 18, 1989Assignee: Sankin Kogyo Kabushiki KaishaInventors: Isamu Kato, Sadayuki Yuhda, Naoki Oda, Masahiro Suganuma
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Patent number: 4820324Abstract: An alloy suitable for use as a spinner in forming glass fibers is provided. The alloy has outstanding stress rupture-life and is highly resistant to the erosion and corrosion of molten glass. The alloy is a cobalt-based alloy and further includes the following in approximate percent by weight, Carbon 0.5 to 1.0; Silicon 0.01 to 0.15; Chromium 30 to 40; Nickel 5 to 15; Tungsten (Wolfram) 4 to 7; Yttrium 0.5 to 1.5; Tantalum 2 to 5; Boron 0.005 to 0.04; Zirconium 0.1 to 0.4. The alloy typically will include the following as impurities, the amounts indicated being in percent by weight unless otherwise set forth: Aluminum 0 to 0.2%; Titanium 0 to 0.2%; Manganese 0 to 0.01%; Iron 0 to 1%; Phosphorous 0 to 0.005%; Molybdenum 0 to 0.10%; Sulfur 0 to 0.005%; Bismuth 0 to 0.5 ppm; Lead 0 to 5.0 ppm; Selenium 0 to 5.0 ppm; Silver 0 to 50 ppm; Nitrogen (N.sub.2) 0 to 150 ppm; Oxygen (O.sub.2) 0 to 50 ppm.Type: GrantFiled: May 18, 1987Date of Patent: April 11, 1989Assignee: Owens-Corning Fiberglas CorporationInventors: David J. Gaul, Dennis L. McGarry
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Patent number: 4781771Abstract: An amorphous Co-based metal filament having a circular cross-section made of an alloy composed mainly of Co-Si-B or Co-Me-Si-B (wherein Me is at least one metal selected from the group consisting of Fe, Ni, Cr, Ta, Nb, V, Mo, Mn, W and Zr). This filament is produced by jetting the above alloy into a rotating member containing therein a cooling liquid through a spinning nozzle having a hole diameter which is determined according to the amorphous metal-forming ability (critical thickness to form an amorphous phase) to thereby cool-solidify the jetted molten alloy and form a filament, and then winding the filament continuously on the inner walls of the rotating member by the rotary centrifugal force thereof. This amorphous metal filament is corrosion resistant, is tough and has high electromagnetic characteristics, and is very useful as industrial materials, such as electric and electronic parts, composite materials and fibrous materials.Type: GrantFiled: December 30, 1986Date of Patent: November 1, 1988Assignees: Unitika Ltd., Tsuyoshi MasumotoInventors: Tsuyoshi Masumoto, Akihisa Inoue, Michiaki Hagiwara, Kiyomi Yasuhara
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Patent number: 4768289Abstract: A cobalt base alloy includes the alloy elements of nickel, chromium, tungsten, silicon and carbon with the nickel content being at least 25 percent by weight. The cobalt base alloy is applied as a coating material for guide bars of saw chains. The alloy has a high hardness with low brittleness by means of which an improved resistance to wear is achieved.Type: GrantFiled: January 20, 1987Date of Patent: September 6, 1988Assignee: Andreas StihlInventors: Norbert Apfel, Wilfried Noll, Hans-Peter Stehle, Horst Doren, Klaus-Dieter Wernicke
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Patent number: 4767432Abstract: A cobalt-base alloy containing hafnium and having a high chromium, tantalum and zirconium content and a low silicon content has superior strength and improved resistance to corrosion by molten glass. The alloy is highly suited for use in spinners for spinning molten mineral material, such as glass, into fibers.Type: GrantFiled: February 7, 1986Date of Patent: August 30, 1988Assignee: Owens-Corning Fiberglas CorporationInventor: David J. Gaul
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Patent number: 4765817Abstract: A cobalt-base alloy containing hafnium and having a high tantalum and zirconium content and a low silicon content has superior strength and improved resistance to corrosion by molten glass. The alloy is highly suited for use in spinners for spinning molten mineral material, such as glass, into fibers.Type: GrantFiled: February 7, 1986Date of Patent: August 23, 1988Assignee: Owens-Corning Fiberglas CorporationInventor: David J. Gaul
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Patent number: 4761169Abstract: An alloy suitable for use as a spinner in forming glass fibers, the alloy being cobalt-based and including the following elements in percent by weight: chromium--about 34.0 to about 38.0; nickel--about 10.0 to about 15.0; wolfram--about 4.0 to about 7.0; tantalum--about 2.0 to about 5.0; zirconium--about 0.1 to about 0.4: silicon--present but about 0.15 max; carbon--about 0.65 to about 0.95; boron--about 0.005 to about 0.02; hafnium--about 0.4 to about 1.0; aluminum--0.0 to about 0.2; titanium--0.0 to about 0.2; manganese--0.0 to about 0.5; molybdenum--0.0 toabout 0.1; iron--0.0 to about 2.0; and cobalt--balance; and further that: ##EQU1## said percents of the elements in equation Nos. 1 and 2 each being atom percent.Type: GrantFiled: October 3, 1986Date of Patent: August 2, 1988Assignee: Owens-Corning Fiberglas CorporationInventor: David J. Gaul
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Patent number: 4728495Abstract: The invention relates to removable dental appliances made of cobalt-chromium-cast alloys containing (in % by weight) 0,1 to 1,0% C, 0,05 to 0,5% N, 0,5 to 3,0% Si, 0,3 to 10,0% Mn, 20 to 35% Cr, 2 to 10% Mo, 5 to 40% Fe, at least 20% Cobalt as rest including incidental impurities.Type: GrantFiled: March 20, 1986Date of Patent: March 1, 1988Assignee: Thyssen Edelstahlwerke AGInventor: Leo Rademacher
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Patent number: 4714468Abstract: A dispersion strengthened cobalt-chromium-molybdenum alloy produced by gas atomization containing a fine oxide dispersion, and characterized, after fabrication by gas atomization, thermomechanical processing and further high temperature exposure, by excellent corrosion resistance, high fatigue strength, high ductility and high temperature stability; a process for producing said alloy and prostheses formed from said alloy.Type: GrantFiled: January 27, 1987Date of Patent: December 22, 1987Assignee: Pfizer Hospital Products Group Inc.Inventors: Kathy K. Wang, Larry J. Gustavson, John H. Dumbleton
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Patent number: 4692305Abstract: A novel alloy is disclosed which is characterized by high resistance to wear and corrosion. The alloy consists essentially of 2 to 25% chromium, 5 to 30% molybdenum, 3 to 15% tungsten, 2 to 8% copper, 2 to 8% boron, and 0.2 to 2% carbon; the balance being incidental impurities and at least 30% of a metal selected from the group consisting of nickel, cobalt and combinations thereof, with the total of molybdenum and tungsten being at least 16%. The alloy is preferably in the form of a powder for thermal spraying, and coating produced thereby generally have an amorphous structure.Type: GrantFiled: November 5, 1985Date of Patent: September 8, 1987Assignee: Perkin-Elmer CorporationInventors: Subramaniam Rangaswamy, John H. Harrington
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Patent number: 4668290Abstract: A dispersion strengthened cobalt-chromium-molybdenum alloy produced by gas atomization containing a fine oxide dispersion, and characterized, after fabrication by gas atomization, thermomechanical processing and further high temperature exposure, by excellent corrosion resistance, high fatigue strength, high ductility and high temperature stability; a process for producing said alloy and prostheses formed from said alloy.Type: GrantFiled: August 13, 1985Date of Patent: May 26, 1987Assignee: Pfizer Hospital Products Group Inc.Inventors: Kathy K. Wang, Larry J. Gustavson, John H. Dumbleton
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Patent number: 4668266Abstract: A cobalt-base alloy having a high chromium, tantalum and zirconium content and a low silicon content has superior strength and improved resistance to corrosion by molten glass. The alloy is highly suited for use in spinners for spinning molten mineral material, such as glass, into fibers.Type: GrantFiled: June 18, 1985Date of Patent: May 26, 1987Assignee: Owens-Corning Fiberglas CorporationInventor: David J. Gaul
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Patent number: 4668265Abstract: A cobalt-base alloy having a high tantalum and zirconium content and a low silicon content has superior strength and improved resistance to corrosion by molten glass. The alloy is highly suited for use in spinners for spinning molten mineral material, such as glass, into fibers.Type: GrantFiled: June 18, 1985Date of Patent: May 26, 1987Assignee: Owens-Corning Fiberglas CorporationInventors: David J. Gaul, Robert E. Spencer
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Patent number: 4668310Abstract: Amorphous alloys having high strength, high hardness, high crystallization temperature, high saturation magnetic induction, low coercive force, high magnetic permeability and particularly low deterioration of magnetic properties with lapse of time, have a composition formula ofT.sub.a X.sub.b Z.sub.c or T.sub.a' X.sub.b' Z.sub.c' M.sub.d,whereinT is at least one of Fe, Co and Ni,X is at least one of Zr, Ti, Hf and Y,Z is at least one of B, C, Si, Al, Ge, Bi, S and P,a is 70-98 atomic %,b is not more than 30 atomic %,c is not more than 15 atomic %,sum of a, b and c is 100 atomic %,M is at least one Mo, Cr, W, V, Nb, Ta, Cu, Mn, Zn, Sb, Sn, Be, Mg, Pd, Pt, Ru, Os, Rh, Ir, Ce, La, Pr, Nd, Sm, Eu, Gd, Tb and Dy,a' is 70-98 atomic %,b' is not more than 30 atomic %,c' is not more than 15 atomic %,d is not more than 20 atomic %, andsum of a', b', c' and d is 100 atomic %.Type: GrantFiled: March 14, 1983Date of Patent: May 26, 1987Assignees: Hitachi Metals, Ltd., Hitachi, Ltd.Inventors: Mitsuhiro Kudo, Shinji Takayama, Yoshizo Sawada, Yasunobu Ogata
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Patent number: 4623387Abstract: Amorphous alloys containing zirconium as an amorphous forming metal and having teh formula X.sub..alpha. Z.sub..gamma. wherein X is at least one of Fe, Co and Ni, .alpha. is 80 to 92 atomic %, Z is zirconium, .gamma. is 8 to 20 atomic % and the sum of .alpha. and .gamma. is 100 atomic %, cause little variation of properties during aging and embrittlement because they contain no metalloid as the amorphous forming element, and they further have excellent strength, hardness, corrosion resistance and heat resistance and maintain superior magnetic properties which are characteristic of iron group elements.Type: GrantFiled: February 5, 1985Date of Patent: November 18, 1986Assignee: Shin-Gijutsu Kaihatsu JigyodanInventors: Tsuyoshi Masumoto, Kiyoyuki Esashi, Masateru Nose
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Patent number: 4622273Abstract: A magnetic recording medium for perpendicular magnetization includes a base of a nonmagnetic material, a first magnetic layer of a soft magnetic material on a surface of the base, a second magnetic layer having perpendicular anisotropy on a surface of the first magnetic layer, the second magnetic layer being magnetized in a transverse direction thereof. The second magnetic layer is composed of a three-element alloy of cobalt, chromium, and hafnium, cobalt being a main component with chromium and hafnium added thereto.Type: GrantFiled: November 5, 1984Date of Patent: November 11, 1986Assignee: Alps Electric Co., Ltd.Inventors: Keishi Nakashima, Takashi Hatanai, Koichi Mukasa
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Patent number: 4618474Abstract: A Co-base heat resistant alloy consisting essentially of:from 0.05 to 1% by weight of C,from 0.05 to 2% by weight of one or both of Si and Mn,from 31 to 40% by weight of Cr,from 5 to 15% by weight of Ni,from 2 to 12% by weight of one or both of W and Mo andfrom 0.1 to 5% by weight of Hf, and optionally further containing:from 0.01 to 1% by weight of one or both of Al and Y,from 0.5 to 3% by weight of one or both of Ta and Nb andfrom 0.005 to 0.1% by weight of one or both of B and Zr,the rest being Co and unavoidable impurities.Type: GrantFiled: January 25, 1985Date of Patent: October 21, 1986Assignees: Asahi Fiber Glass Company, Limited, Asahi Glass Company, Limited, Mitsubishi Kinzoku Kabushiki KaishaInventors: Junya Ohe, Saburo Wakita, Kiichi Yamatsuta, Shoji Goto, Yukinori Kutsukake, Masuo Sugizaki
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Patent number: 4603091Abstract: A magnetic recording medium for perpendicular magnetization includes a base of a nonmagnetic material, a first magnetic layer of a soft magnetic material on a surface of the base, a second magnetic layer having perpendicular anisotropy on a surface of the first magnetic layer, the second magnetic layer being magnetized in a transverse direction thereof. The second magnetic layer is composed of a three-element alloy of cobalt, chromium, and tantalum, cobalt being a main component with chromium and tantalum added thereto.Type: GrantFiled: November 5, 1984Date of Patent: July 29, 1986Assignee: Alps Electric Co., Ltd.Inventors: Koichi Mukasa, Takashi Hatanai, Keishi Nakashima
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Patent number: 4582536Abstract: The present invention provides a method for consolidating rapidly solidified, transition metal alloys which includes the step of compacting a plurality of alloy bodies at a temperature ranging from about 0.90-0.99 Tm (melting temperature in .degree.C.) for a time period ranging from about 1 min to 24 hours. The alloy bodies contain at least two transition metal elements and consist essentially of the formula (Fe,Co and/or Ni).sub.bal (W, Mo, Nb and/or Ta).sub.a (Al and/or Ti).sub.b (Cr).sub.c (B and/or C).sub.d (Si and/or P).sub.e, wherein "a" ranges from about 0-40 at. %, "b" ranges from about 0-40 at. %, "c" ranges from about 0-40 at. %, "d" ranges from about 5-25 at. %, and "e" ranges from about 0-15 at. %. The alloy bodies also have a substantially homogeneous and optically featureless structure.Type: GrantFiled: December 7, 1984Date of Patent: April 15, 1986Assignee: Allied CorporationInventor: Derek Raybould
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Patent number: 4530664Abstract: A cobalt-chromium alloy consisting essentially of:______________________________________ Element Weight Percent ______________________________________ Cobalt 50-70 Chromium 25-35 Molybdenum 2-10 Manganese 0-2 Carbon 0-0.1 ______________________________________and(i) from about 1 to about 6% silicon or(ii) from about 2 to about 6% silicon and from about 0.1 to about 1.5% boron with the proviso that the combined amount of silicon and boron is greater than or equal to 3% or(iii) from about 1 to about 6% aluminum or(iv) from about 1 to about 6% silicon and from about 1 to about 6% aluminum with the proviso that the combined amount of silicon and aluminum is less than about 8% or(v) from about 1 to about 6% silicon, from about 0.1 to about 1.5% boron and from about 1 to about 6% aluminum with the proviso that the combined amount of silicon and aluminum is less than about 8%, said alloy constituents totalling 100%.Type: GrantFiled: March 24, 1983Date of Patent: July 23, 1985Assignee: Jeneric Industries, Inc.Inventors: Arun Prasad, Grant P. Day
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Patent number: 4517017Abstract: Disclosed is a temperature sensitive amorphous magnetic alloy which shows a Curie point of not higher than 200.degree. C. and whose composition is represented by the formula:(M.sub.1-a Ni.sub.a).sub.100-z X.sub.zwhereinM=Co or Fe;X=at least one of P, B, C and Si;0.2.ltoreq.a.ltoreq.0.8 when M is Co, or 0.4.ltoreq.a.ltoreq.0.9 when M is Fe; and15.ltoreq.z.ltoreq.30.Type: GrantFiled: February 8, 1982Date of Patent: May 14, 1985Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Koichiro Inomata, Shinichi Murata
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Patent number: 4514359Abstract: A nonprecious alloy for porcelain-bonded dental restorations consists essentially of, in approximate percentage by weight, 25-30 chromium, 5-7 molybdenum, 0-1.0 each manganese and silicon, 0-0.3 carbon and 0-4 each gallium and indium, balance cobalt, these constituents accounting for at least 99.5 percent of the alloy, the sum of the manganese and silicon being at least about 0.5 percent and the sum of the gallium and indium being at least about 1.25 percent.Type: GrantFiled: March 30, 1983Date of Patent: April 30, 1985Assignee: Austenal International, Inc.Inventor: Henry L. Andrews
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Patent number: 4473417Abstract: There is disclosed an amorphous alloy for a magnetic core material represented by the formula(Co.sub.1-x.sbsb.1.sub.-x.sbsb.2 Fe.sub.x.sbsb.1 M.sub.x.sbsb.2).sub.x.sbsb.3 B.sub.x.sbsb.4 Si.sub.100-x.sbsb.3.sub.-x.sbsb.4wherein M is at least one element selected from the group consisting of Ti, V, Cr, Mn, Ni, Zr, Nb, Mo, Ru, Hf, Ta, W and Re, and x.sub.1, x.sub.2, x.sub.3 and x.sub.4 are numbers which satisfy relations of 0.ltoreq.x.sub.1 .ltoreq.0.10, 0.ltoreq.x.sub.2 .ltoreq.0.10, 70.ltoreq.x.sub.3 .ltoreq.79 and 5.ltoreq.x.sub.4 .ltoreq.9, respectively.According to the present invention, it could be provided an amorphous alloy suitable for a magnetic core material of a magnetic amplifier in which its coercive force is as low as 0.4 oersted or less at a high frequency of 20 KHz or more, particularly even at 50 KHz, and its rectangular ratio is as much as 85% or more.Type: GrantFiled: August 6, 1982Date of Patent: September 25, 1984Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Koichiro Inomata, Michio Hasegawa, Masakatsu Haga, Takao Sawa
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Patent number: 4459262Abstract: A cobalt-or nickel-base alloy, which is especially suited for the preparation of dental prostheses, because it is sufficiently corrosion- and wear-resistant, cold-formable, and colorfast and has good castability, the possesses the strength properties of the noble metal alloys known from dental technology. The alloy contains in addition to the base metal 10-50% (wt.) chromium and 0.2-4.5% (wt.) gallium. The new alloys can additionally contain 0.05-0.08% (wt.) lanthanum, 0.03-0.1% (wt.) neodymium, and 1.0-6.0% (wt.) molybdenum.Due to its elasticity and low density the alloy is particularly suited for firm, i.e. firmly anchored dental prostheses. However, it is also best suited for the production of base plates, anchoring clamps and clamping systems of removable dental prostheses.Since the alloy does not contain any noble metal, the ingredients can be easily procured and the production costs are only a fraction of the costs of noble metal alloys.Type: GrantFiled: November 1, 1982Date of Patent: July 10, 1984Assignee: Fogtechnikai VallalatInventor: Jozsef Komar Kalmar
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Patent number: 4439253Abstract: A cobalt based, manganese-containing glassy metal alloy is provided. The alloy has a combination of near-zero magnetostriction (+5 ppm to -1 ppm), high permeability (greater than 5,000) and high saturation induction (about 1.09 T or greater). The alloy has a composition described by the formula [Co.sub.a Fe.sub.1-a ].sub.100-(b+c) Mn.sub.b B.sub.c-d Si.sub.d, where "a" ranges from about 0.90 to 0.99, "b" ranges from about 2 to 6 atom percent, "c" ranges from about 14 to 20 atom percent and "d" ranges from zero to about 7 atom percent, with the proviso that the minimum B present is 10 atom percent. The alloys of the invention find use in magnetic recording heads, switching power supplies, special magnetic amplifiers and the like.Type: GrantFiled: March 4, 1982Date of Patent: March 27, 1984Assignee: Allied CorporationInventor: V. R. V. Ramanan
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Patent number: 4410490Abstract: New nickel and cobalt base alloys containing tungsten and carbon are disclosed. The alloys are subjected to rapid solidification processing (RSP) technique which produces cooling rates between 10.sup.5 .degree. to 10.sup.7 .degree. C./sec. The as-quenched ribbon, powder, etc. consists predominantly of amorphous phase. The amorphous phase is subjected to suitable heat treatments so as to produce a transformation to a microcrystalline alloy which includes carbides; this heat treated alloy exhibits high hardness combined with toughness for many applications wherein superhard materials are required.Type: GrantFiled: July 12, 1982Date of Patent: October 18, 1983Assignee: Marko Materials, Inc.Inventors: Ranjan Ray, Viswanathan Panchanathan
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Patent number: 4382909Abstract: There is provided a gold free alloy for firing on ceramic compositions, especially for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, and the balance consisting essentially of cobalt. There can also be present up to 1 weight % boron, up to 20 weight % molybdenum and/or tungsten, up to 8 weight % scandium, yttrium, lanthanum and/or the rare earths and up to 5 weight % aluminum, silicon, tin, indium and/or gallium.Type: GrantFiled: March 6, 1981Date of Patent: May 10, 1983Assignee: Degussa AktiengesellschaftInventor: Gerhard Zwingmann
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Patent number: RE33022Abstract: A ferromagnetic amorphous alloy having a composition represented by (Co.sub.x Ni.sub.y Fe.sub.z).sub.a M.sub.b G.sub.c, wherein M is Cr, Mo and/or W, G is Zr, Hf and/or Ti and x,y,z and a, b, c are selected to meet the conditions of x=1-y-z, 0.ltoreq.y.ltoreq.0.2, 0.ltoreq.z.ltoreq.0.7, a=1-b-c, 0.ltoreq.b.ltoreq.0.05 and 0.05.ltoreq.c.ltoreq.0.2 This amorphous alloy has a superior magnetic characteristic and a high thermal stability.Type: GrantFiled: November 5, 1987Date of Patent: August 15, 1989Assignees: Hitachi, Ltd., Hitachi Metals, Ltd., Research Development Corp. of JapanInventors: Shinji Takayama, Yasuo Tsukuda, Kazuo Shiiki, Shigekazu Otomo, Mitsuhiro Kudo, Yasunobu Ogata, Yoshizo Sawada