Zirconium Or Boron Containing Patents (Class 420/449)
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Patent number: 7005015Abstract: A high-temperature component made of a nickel super-alloy has the following composition in wt %: 11–13% of Cr, 3–5% of W, 0.5–2.5% of Mo, 3–5% of Al, 3–5% of Ti, 3–7% of Ta, 1–5% of Re and a remainder formed of nickel. A corresponding component which is also provided is formed of an alloy having a composition essentially similar to that mentioned above, but with the rhenium proportion replaced with 0.1–5 wt % of ruthenium.Type: GrantFiled: January 29, 2002Date of Patent: February 28, 2006Assignee: Seimens AktiengesellschaftInventors: Ralf Bürgel, Winfried Esser, Jörn Grossmann, Wolfgang Hermann, Hael Mughrabi, Jürgen Preuhs, Florian Pyczak, Alfred Scholz, Robert Singer, Andreas Volek
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Patent number: 6974508Abstract: A low solvus, high refractory alloy having unusually versatile processing mechanical property capabilities for advanced disks and rotors in gas turbine engines. The nickel base superalloy has a composition consisting essentially of, in weight percent, 3.0–4.0 Al, 0.02–0.04 B, 0.02–0.05 C, 12.0–14.0 Cr, 19.0–22.0 Co, 2.0–3.5 Mo, greater than 1.0 to 2.1 Nb, 1.3 to 2.1 Ta, 3.0–4.0 Ti, 4.1 to 5.0 W, 0.03–0.06 Zr, and balance essentially Ni aid incidental impurities. The superalloy combines ease of processing with high temperature capabilities to be suitable for use in various turbine engine disk, impeller, and shaft applications. The Co and Cr levels of the superalloy can provide low solvus temperature for high processing versatility. The W, Mo, Ta, and Nb refractory element levels of the superalloy can provide sustained strength, creep, and dwell crack growth resistance at high temperatures.Type: GrantFiled: October 29, 2002Date of Patent: December 13, 2005Assignee: The United States of America as represented by the United States National Aeronautics and Space AdministrationInventors: Timothy P. Gabb, John Gayda, Ignacy Telesman, Pete T. Kantzos
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Patent number: 6969431Abstract: A nickel based superalloy composition comprising 16.0 to 20.0 weight % Co, 9.5 to 11.5 weight % Cr, 1.8 to 3.0 weight % Mo, 4.3 to 6.0 weight % W, 3.0 to 4.2 weight % Al, 3.0 to 4.4 weight % Ti, 1.0 to 2.0 weight % Ta, 0.5 to 1.5 weight % Nb, 0.01 to 0.05 weight % C, 0.01 to 0.04 weight % B, and 0.04 to 0.15 weight % Zr, balance Ni.Type: GrantFiled: August 29, 2003Date of Patent: November 29, 2005Assignee: Honeywell International, Inc.Inventors: Andrew F. Hieber, Howard F. Merrick
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Patent number: 6926778Abstract: An austenitic stainless steel suited for ultra supercritical boilers, which consists of C: 0.03-0.12%, Si: 0.1-1%, Mn: 0.1-2%, Cr: not less than 20% but less than 28%, Ni: more than 35% but not more than 50%, W: 4-10%, Ti: 0.01-0.3%, Nb: 0.01-1%, sol. Al: 0.0005-0.04%, B: 0.0005-0.01%, and the balance Fe and impurities; and also characterized by the impurities whose contents are restricted to P: not more than 0.04%, S: not more than 0.010%, Mo: less than 0.5%, N: less than 0.02%, and O (oxygen): not more than 0.005%. Heat resistant pressurized parts excellent in thermal fatigue properties and structural stability at high temperatures, which have a coarse grain whose grain size number is 6 or less, and whose mixed grain ratio is 10% or less.Type: GrantFiled: April 16, 2003Date of Patent: August 9, 2005Assignee: Sumitomo Metal Industries, Ltd.Inventors: Atsuro Iseda, Hiroyuki Semba
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Patent number: 6902633Abstract: A nickel-base alloy consists of, by weight, about 15.0 to about 17.0% chromium, about 7.0 to about 10.0% cobalt, about 1.0 to about 2.5% molybdenum, about 2.0 to about 3.2% tungsten, about 0.6 to about 2.5% columbium, less than 1.5% tantalum, about 3.0 to about 3.9% aluminum, about 3.0 to about 3.9% titanium, about 0.005 to about 0.060% zirconium, about 0.005 to about 0.030% boron, about 0.07 to about 0.15% carbon, the balance nickel and impurities. Preferably, columbium is present in an amount greater than tantalum. Tantalum can be essentially absent from the alloy, i.e., only at impurity levels.Type: GrantFiled: May 9, 2003Date of Patent: June 7, 2005Assignee: General Electric CompanyInventors: Warren Tan King, John Herbert Wood, Gangjigang Feng
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Patent number: 6866727Abstract: A nickel based superalloy composition comprising about 16.5 to about 20.5 weight % Co, about 9.5 to about 12.5 weight % Cr, about 1.8 to about 3.2 weight % Mo, about 4.25 to about 6.0 weight % W, about 3.0 to about 4.2 weight % Al, about 3.0 to about 4.4 weight % Ti, about 1.0 to about 2.0 weight % Ta, about 0.6 to about 1.8 weight % Nb, about 0.01 to about 0.08 weight % C, about 0.01 to about 0.06 weight % B, and about 0.04 to about 0.15 weight % Zr, balance Ni.Type: GrantFiled: December 19, 2003Date of Patent: March 15, 2005Assignee: Honeywell International, Inc.Inventors: Andrew F. Hieber, Howard F. Merrick
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Patent number: 6818077Abstract: A nickel-based superalloy containing 12.0 to 16.0% by weight of Cr, 4.0 to 9.0% by weight of Co, 3.4 to 4.6% by weight of Al, 0.5 to 1.6% by weight of Nb, 0.05 to 0.16% by weight of C, 0.005 to 0.025% by weight of B, and at least one of Ti, Ta and Mo. Amounts of Ti, Ta and Mo are ones calculated by the equations (1) and (2), wherein TiEq is 4.0 to 6.0 and MoEq is 5.0 to 8.0. TiEq=Ti % by weight+0.5153×Nb % by weight+0.2647×Ta % by weight (1) MoEq−Mo % by weight+0.5217×W % by weight+0.5303×Ta % by weight+1.Type: GrantFiled: May 6, 2003Date of Patent: November 16, 2004Assignee: Hitachi, Ltd.Inventors: Akira Yoshinari, Hideki Tamaki, Hiroyuki Doi
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Publication number: 20040223868Abstract: A nickel-base alloy consists of, by weight, about 15.0 to about 17.0% chromium, about 7.0 to about 10.0% cobalt, about 1.0 to about 2.5% molybdenum, about 2.0 to about 3.2% tungsten, about 0.6 to about 2.5% columbium, less than 1.5% tantalum, about 3.0 to about 3.9% aluminum, about 3.0 to about 3.9% titanium, about 0.005 to about 0.060% zirconium, about 0.005 to about 0.030% boron, about 0.07 to about 0.15% carbon, the balance nickel and impurities. Preferably, columbium is present in an amount greater than tantalum. Tantalum can be essentially absent from the alloy, i.e., only at impurity levels.Type: ApplicationFiled: May 9, 2003Publication date: November 11, 2004Applicant: GENERAL ELECTRIC COMPANYInventors: Warren Tan King, John Herbert Wood, Ganjiang Feng
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Patent number: 6752883Abstract: A free-cutting Ni-base heat-resistant alloy excellent in the high-temperature strength and corrosion resistance was proposed. The alloy contains Ni as a major component, 0.01 to 0.3 wt % of C and 14 to 35 wt % of Cr, and further contains at least one element selected from Ti, Zr and Hf in a total amount of 0.1 to 6 wt %, and S in an amount of 0.015 to 0.5 wt %. The alloy has dispersed in the matrix thereof a machinability improving compound phase, where such phase contains any one of Ti, Zr and Hf as a major constituent of the metal elements, essentially contains C and either S or Se as a binding component for such metal elements. The alloy also satisfies the relations of WTi+0.53WZr+0.27WHf>2WC+0.75WS and WC>0.37WS, where WTi represents Ti content (wt %), WZr represents Zr content (wt %), WHf represents Hf content (wt %), WC represents C content (wt %) and WS represents S content (wt %).Type: GrantFiled: May 31, 2002Date of Patent: June 22, 2004Assignees: Dokuritsu Gyousei Houjin Sangyo Gijutsu Sougo Kenkyusho, Daido Tokushuko Kabushiki Kaisha, Tohoku Tokushuko Kabushiki KaishaInventors: Kiyohito Ishida, Katsunari Oikawa, Shigeki Ueta, Toshiharu Noda, Takashi Ebata
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Patent number: 6740177Abstract: A castable and weldable nickel-base alloy that exhibits a desirable balance of strength and resistance to corrosion and oxidation suitable for gas turbine engine applications. A suitable composition for the alloy consists essentially of, by weight, 10% to 25% cobalt, 20% to 28% chromium, 1% to 3% tungsten, 0.5% to 1.5% aluminum, 1.5% to 2.8% titanium, 0.8% to 1.45% columbium, tantalum in an amount less than columbium and Cb+0.508Ta is 1.15% to 1.45%, 0.001% to 0.025% boron, up to 0.4% zirconium, 0.02% to 0.15% carbon, with the balance essentially nickel and incidental impurities.Type: GrantFiled: July 30, 2002Date of Patent: May 25, 2004Assignee: General Electric CompanyInventors: John Herbert Wood, Gangjigang Feng, Cyril Gerard Beck
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Patent number: 6730264Abstract: A nickel-base alloy includes, in weight percent, up to about 0.10 percent carbon; about 12 up to about 20 percent chromium; up to about 4 percent molybdenum; up to about 6 percent tungsten, wherein the sum of molybdenum and tungsten is at least about 2 percent and not more than about 8 percent; about 5 up to about 12 percent cobalt; up to about 14 percent iron; about 4 percent up to about 8 percent niobium; about 0.6 percent up to about 2.6 percent aluminum; about 0.4 percent up to about 1.4 percent titanium; about 0.003 percent up to about 0.03 percent phosphorous; about 0.003 percent up to about 0.015 percent boron; nickel; and incidental impurities. The sum of atomic percent aluminum and atomic percent titanium is from about 2 to about 6 percent, the ratio of atomic percent aluminum to atomic percent titanium is at least about 1.5, and the atomic percent of aluminum plus titanium divided by the atomic percent of niobium equals about 0.8 to about 1.3.Type: GrantFiled: May 13, 2002Date of Patent: May 4, 2004Assignee: ATI Properties, Inc.Inventor: Wei-Di Cao
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Patent number: 6702906Abstract: A Ni-base heat resistant alloy excellent in weldability and strength at elevated temperatures and suited for use in manufacturing cracking furnace tubes and reformer furnace tubes to be used in ethylene plants as well as a welded joint therefor is provided. The alloy of the invention is a Ni-base heat-resistant alloy, which comprises C: not more than 0.1%, Si: not more than 2%, Mn: not more than 2%, P: not more than 0.025%, S: not more than 0.005%, N: not more than 0.04%, Cr: 10 to 30%, Al: 2.1 to less than 4.5%, and Mo: 2.5 to 15% or W: 2.5 to 9% or Mo and W: 2.5 to 15% in total, and satisfies the relation (1) given below: (104Si+1980P+1980S+9Al+15Ti+11Nb+1.8W+11600B)≦{1.Type: GrantFiled: July 11, 2002Date of Patent: March 9, 2004Assignee: Sumitomo Metal Industries, Ltd.Inventors: Kazuhiro Ogawa, Kazuyuki Kitamura, Hirokazu Okada, Yoshitaka Nishiyama
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Patent number: 6696176Abstract: A fusion weldable superalloy containing 0.005-0.5 wt. % scandium. In one embodiment, the superalloy may have a composition similar to IN-939 alloy, but having added scandium and having only 0.005-0.040 wt. % zirconium. A gas turbine component may be formed by an investment casting of such a scandium-containing superalloy, and may include a fusion weld repaired area. A scandium-containing nickel-based superalloy coated with an MCrAlY bond coat will have improved cyclic oxidation resistance due to the sulfur-gettering effect of the scandium.Type: GrantFiled: March 6, 2002Date of Patent: February 24, 2004Assignee: Siemens Westinghouse Power CorporationInventors: David B. Allen, Gregg P. Wagner, Brij B. Seth
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Patent number: 6544668Abstract: Nickel aluminum alloys are welded utilizing a nickel based alloy containing zirconium but substantially free of titanium and niobium which reduces the tendency to crack.Type: GrantFiled: September 15, 1999Date of Patent: April 8, 2003Assignee: U. T. Battelle, LLCInventors: Michael L. Santella, Jeffrey D. McNabb, Vinod K. Sikka
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Patent number: 6537393Abstract: A nickel base alloy for high temperature thermal processing hardware requiring ultra-low spallation and metal loss rates in oxidizing and nitriding atmospheres for use in wire mesh belting, thermocouple sheathing, resistive heating elements, heat sensing cables, furnace internals and like hardware. The compositional range of the alloy is 15.0-23.0 % Cr, 0.5-2.0 % Si, 0.0-4.0% Mo, 0.0-1.2 % Nb, 0.0-3.0 % Fe, 0.0-0.5 % Ti, 0.0-0.5 % Al, 0.0-0.3 % Mn, 0.0-0.1 % Zr, 0.0-0.06 % Ce, 0.005-0.025 % Mg, 0.0005-0.005 % B, 0.005-0.3 % C, 0.0-20.0 % Co, balance Ni. The alloy possesses a high degree of hot and cold workability, phase stability and strength retention at elevated temperatures.Type: GrantFiled: August 29, 2001Date of Patent: March 25, 2003Assignee: INCO Alloys International, Inc.Inventors: Norman C. Farr, Gaylord D. Smith
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Patent number: 6491769Abstract: A high strength, corrosion resistant Cr—Co—Ni base alloy for long-life service at 530° C. to 820° C. containing in % by weight about 23.5-25.5% Cr, 15.0-22.0% Co, 0.2-2.0% Al, 0.5-2.5% Ti, 0.5-2.5% Nb, up to 2.0% Mo, up to 1.0% Mn, 0.3-1.0% Si, up to 3.0% Fe, up to 0.3% Ta, up to 0.3% W, 0.005-0.08% C, 0.01-0.3 % Zr, 0.001-0.01% B, up to 0.05% rare earth as misch metal, 0.005-0.025% Mg plus optional Ca, balance Ni including trace additions and impurities. The alloy provides a combination of strength, ductility, stability, toughness and oxidation/sulfidation resistance so as to render the alloy range uniquely suitable for engineering applications where oxygen/sulfur-containing atmospheres are life limiting, in applications such as exhaust valves for diesel engines and in tubes for coal-fired steam boilers.Type: GrantFiled: August 29, 2001Date of Patent: December 10, 2002Assignee: Inco Alloys International, Inc.Inventors: Gaylord D. Smith, Brian A. Baker
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Patent number: 6458318Abstract: A heat resistant Ni base alloy comprises, on a mass% basis, 0.1% or less C, 2% or less Si, 2% or less Mn, 0.005% or less S, 10 to 25% Cr, 2.1 to less than 4.5% Al, 0.08% or less N, 0.001 to 1% in total of one or more elements of B: 0.03% or less, Zr: 0.2% or less and Hf: 0.8% or less, and 2.5 to 15% in total of one or more elements of Mo: 0.01 to 15% and W: 0.01 to 9%. The alloy is suitable as a material for a pipe used in ethylene cracking furnace.Type: GrantFiled: June 29, 2000Date of Patent: October 1, 2002Assignee: Sumitomo Metal Industries, Ltd.Inventors: Yoshitaka Nishiyama, Toshiro Anraku, Yoshiatsu Sawaragi, Kazuhiro Ogawa, Hirokazu Okada
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Publication number: 20020015656Abstract: A low thermal expansion Ni-base superalloy contains, by weight % (hereinafter the same as long as not particularly defined), C: 0.15% or less; Si: 1% or less; Mn: 1% or less; Cr: 5 to 20%; at least one of Mo, W and Re of Mo+½ (W+Re) of 10 to 25%; Al: 0.2 to 2%; Ti: 0.5 to 4.5%; Fe of 10% or less; at least one of B: 0.02% and Zr: 0.2% or less; a remainder of Ni and inevitable impurities; wherein the atomic % of Al+Ti is 2.5 to 7.0.Type: ApplicationFiled: March 2, 2000Publication date: February 7, 2002Inventors: Ryotaro Magoshi, Yoshikuni Kadoya, Ryuichi Yamamoto, Toshiharu Noda, Susumu Isobe, Michio Okabe
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Publication number: 20020004017Abstract: A melting crucible is described, the crucible having a composition comprising in weight %: 24-32 Cr; 8-11 Fe; 0.15-0.25 C; 1.8-2.4 Al; 0.1-0.2 Ti; 0.05-0.12 Y; 0.010-0.10 Zr; 0.1 max. Mn; 0.5 max. Si; 0.1 max. Cu; Balance Ni apart from incidental impurities.Type: ApplicationFiled: May 2, 2001Publication date: January 10, 2002Inventor: Brian Edwin Quayle
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Patent number: 6284392Abstract: A cast nickel-base superalloy component (10) is made having a composition containing small amounts of both boron and zirconium which are effective in combination to provide increased weldability, where such alloy is adapted for welding by weld (18) to a second superalloy piece, where the two pieces are firmly bonded together and have a Sigmajig transverse stress value (16) greater than 137.9 million Newtons per square meter.Type: GrantFiled: August 11, 1999Date of Patent: September 4, 2001Assignee: Siemens Westinghouse Power CorporationInventors: Brij B. Seth, Easo P. George, Sudarsanum S. Babu, Gene M. Goodwin, Stanislaus A. David, Carol E. Moyer
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Patent number: 6270719Abstract: A modified Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy which has at least one of the following characteristics: 1) an increased charge/discharge rate capability over that the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy; 2) a formation cycling requirement which is reduced to one tenth that of the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy; or 3) an oxide surface layer having a higher electrochemical hydrogen storage catalytic activity than the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy.Type: GrantFiled: April 12, 1999Date of Patent: August 7, 2001Assignee: Ovonic Battery Company, Inc.Inventors: Michael A. Fetcenko, Kwo Young, Stanford R. Ovshinsky, Benjamin Reichman, John Koch, William Mays
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Patent number: 6242113Abstract: A nickel, chromium, iron alloy for use in producing weld deposits. The alloy comprises, in weight percent, about 27 to 31.5 chromium; about 7 to 11 iron; about 0.005 to 0.05 carbon; less than about 1.0 manganese, preferably 0.30 to 0.95 manganese; about 0.60 to 0.95 niobium; less than 0.50 silicon, preferably 0.10 to 0.30 silicon; 0.01 to 0.35 titanium; 0.01 to 0.25 aluminum; less than 0.20 copper; less than 1.0 tungsten; less than 1.0 molybdenum; less than 0.12 cobalt; less than 0.10 tantalum; less than about 0.10 zirconium, preferably 0.002 to 0.10 zirconium; less than about 0.01 sulfur; less than about 0.01 boron, preferably 0.001 to 0.01 boron; less than about 0.02 phosphorous; and balance nickel and incidental impurities.Type: GrantFiled: June 10, 1999Date of Patent: June 5, 2001Assignee: Inco Alloys International, Inc.Inventor: Samuel D. Kiser
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Patent number: 6238620Abstract: A novel Ni3Al-based alloy exhibits strengths and hardness in excess of the standard base alloy IC-221M at temperatures of up to about 1000° C. The alloy is useful in tool and die applications requiring such temperatures, and for structural elements in engineering systems exposed to such temperatures.Type: GrantFiled: September 15, 1999Date of Patent: May 29, 2001Assignee: U.T.Battelle, LLCInventors: Chain T. Liu, Everett E. Bloom
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Patent number: 6231692Abstract: Machineable nickel base alloy casting, consisting essentially of, in weight %, about 12.5% to 15% Cr, about 9.00% to 10.00% Co, about 3.70% to 4.30% Mo, about 3.70% to 4.30% W, about 2.80% to 3.20% Al, about 4.80% to 5.20% Ti, about 0.005% to 0.02% B, up to about 0.10% Zr, and balance essentially Ni and carbon below about 0.08 weight % to improve machinability while retaining alloy strength properties after appropriate heat treatment.Type: GrantFiled: January 28, 1999Date of Patent: May 15, 2001Assignees: Howmet Research Corporation, Siemens AktiengesellschaftInventors: Russell G. Vogt, John Corrigan, John R. Mihalisin, Ursula Pickert, Winfried Esser
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Patent number: 6210635Abstract: A composition comprises cobalt; chromium; carbon; boron; zirconium; aluminum; at least one refractory material; and nickel. The composition is used as a repair material for repairing superalloy articles in a repair process.Type: GrantFiled: November 24, 1998Date of Patent: April 3, 2001Assignee: General Electric CompanyInventors: Melvin Robert Jackson, Aaron Todd Frost, Charles Gitahi Mukira, Ann Melinda Ritter, Paul Vincent Crimi, Raymond Alan White
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Patent number: 6190467Abstract: A Ni-base alloy composition comprises of Zr, B, and Si. Zr and B are coupled to each other to form ZrB2, the B and Zr suppress melting points of the Ni-base alloy composition. Further, a Ni-base alloy composition also comprises Cr, Ti, and Ni, where the Ti and Cr suppress melting points.Type: GrantFiled: June 7, 1999Date of Patent: February 20, 2001Assignee: General Electric CompanyInventors: Melvin Robert Jackson, Stephen Joseph Ferrigno, David Edwin Budinger, Richard Patrick Chesnes
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Patent number: 6132535Abstract: Provided is a process for improving alloy properties which can improve the high-temperature ductility of a Ni-base heat-resisting alloy while maintaining its excellent high-temperature strength and weldability.Type: GrantFiled: October 28, 1999Date of Patent: October 17, 2000Assignees: Mitsubishi Heavy Industries, Ltd., Mitsubishi Steel Mfg. Co., Ltd.Inventors: Ikuo Okada, Taiji Torigoe, Hisataka Kawai, Koji Takahashi, Itaru Tamura, Shyuichi Sakashita
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Patent number: 6106767Abstract: Nickel-base alloys with improved elevated temperature creep and stress rupture lives are disclosed which are particularly useful for components in gas turbine engines exposed to high temperatures and stresses for long periods of time. The alloys are nickel-based consisting essentially of 0.005 to 0.15% C, 0.10 to 11% Mo, 0.10 to 4.25% W, from 12 to 31% Cr, 0.25 to 21% Co, up to 5% Fe, 0.10 to 3.75% Nb, 0.10 to 1.25% Ta, 0.01 to 0.10% Zr, 0.10 to 0.50% Mn, 0.10 to 1% V, l.8-4.75% Ti, 0.5 to 5.25% Al, less than 0.003% P, and 0.004 to 0.025% B. Key to the improvement of creep and stress rupture lives is the extremely low P content in conjunction with high B contents.Type: GrantFiled: June 18, 1998Date of Patent: August 22, 2000Assignee: Teledyne Industries, Inc.Inventors: Richard L. Kennedy, Wei-Di Cao
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Patent number: 6039919Abstract: A high corrosion resisting alloy for use in inlet and exhaust valves of diesel engines which is low in cost and excellent in corrosion resistance and strength, which consists by weight percentage of C.ltoreq.0.1%, Si.ltoreq.1.0%, Mn.ltoreq.1.0%, 25%<Cr.ltoreq.32%, 2.0%<Ti.ltoreq.3.0%, 1.0%.ltoreq.Al.ltoreq.2.0% and the balance being Ni and incidental impurities. The valves for the diesel engines are manufactured through the steps of forging the above-mentioned alloy into near net shapes of the valves, performing aging treatment (after solid solution treatment according to demand), and further enhancing hardness of the valves at their valve faces locally through partial cold forging.Type: GrantFiled: February 3, 1998Date of Patent: March 21, 2000Assignees: Daido Tokushuko Kabushiki Kaisha, Nittan Valve Co., Ltd.Inventors: Tomotaka Nagashima, Michio Okabe, Toshiharu Noda, Kiyoshi Okawachi
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Patent number: 5939204Abstract: An article that is used to transport a hot oxidizing gas, in particular a flue gas in a gas turbine, has a surface acted upon by the gas. This surface is formed by an alloy which has 10 to 40 wt. % chrome, 1 to 20 wt. % gallium and optionally other specific elements in a base including at least one element from the group of iron, cobalt and nickel. In the alloy the gallium replaces aluminum and/or silicon. The alloy is deposited especially as a protective layer on a superalloy substrate and optionally coated with a gas-permeable ceramic layer.Type: GrantFiled: February 17, 1998Date of Patent: August 17, 1999Assignee: Siemens AktiengesellschaftInventor: Norbert Czech
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Patent number: 5900078Abstract: A high-temperature sulfidation-corrosion resistant nickel-base alloy includes 12.about.15 weight % of cobalt, 18.about.21 weight % of chromium, 3.5.about.5 weight % of molybdenum, 0.02.about.0.1 weight % of carbon, at most 2.75 weight % of titanium, and at least 1.6 weight % of aluminum. The remainder is essentially of nickel except for impurities. The high-temperature sulfidation-corrosion resistant nickel-base alloy has sufficient high-temperature strength and is highly resistant to a high-temperature sulfidation corrosion.Type: GrantFiled: February 14, 1997Date of Patent: May 4, 1999Assignee: Ebara CorporationInventors: Hiroshi Yakuwa, Matsuho Miyasaka, Toshio Narita, Shuhei Nakahama, Masamichi Kawasaki
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Patent number: 5815792Abstract: A nickel-based superalloy possessing good mechanical properties when hot regarding traction, creep and cracking resistance has a chemical composition which comprises, in percentages by weight: Co 14.5 to 15.5 ; Cr 12 to 15 ; Mo 2 to 4.5 : Al 2.5 to 4; Ti 4 to 6; Hf not more than 0.5 ; C 100 to 300 ppm; B 100 to 500 ppm; Zr 200 to 700 ppm; possibly W up to 4.5; and nickel as the remainder. Components made from these alloys have an excellent microstructural stability when operating at temperatures up to 800.degree. C.Type: GrantFiled: July 30, 1996Date of Patent: September 29, 1998Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "Snecma"Inventors: Catherine Duquenne, Jean Charles Henri Lautridou, Michel Marty, Michele Soucail, Andre Walder
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Patent number: 5667752Abstract: There is provided a copper alloy sheet for forming a connector, having a chemical composition consisting essentially of:Mg: 0.3-2% by weight;P: 0.001-0.02% by weight;C: 0.0002-0.0013% by weight;O: 0.0002-0.001% by weight; andCu and inevitable impurities: the balance. The copper alloy sheet has a structure that fine particles of oxides including Mg oxide having a particle size of not more than 3 .mu.m are evenly dispersed in a matrix of the copper alloy sheet. The copper alloy sheet is excellent not only in tensile strength, elongation, electric conductivity and spring limit value before forming, but also in spring limit value after forming, and high-temperature creep strength.Type: GrantFiled: March 20, 1996Date of Patent: September 16, 1997Assignee: Mitsubishi Shindoh Co., Ltd.Inventors: Takeshi Suzuki, Rensei Futatsuka, Manpei Kuwahara, Seiji Kumagai
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Patent number: 5626987Abstract: A monophase hydridable material for the negative electrode of a nickel-metal hydride storage battery with a "Lave's phase" structure of hexagonal C14 type (MgZn.sub.2) has the general formula:Zr.sub.1-x Ti.sub.x Ni.sub.a Mn.sub.b Al.sub.c Co.sub.d V.sub.Type: GrantFiled: April 14, 1995Date of Patent: May 6, 1997Assignee: SAFTInventors: Bernard Knosp, Jacques Bouet, Christian Jordy, Michel Mimoun, Daniel Gicquel
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Patent number: 5599385Abstract: A protective coating resistant to corrosion at medium and high temperatures is applied on a nickel-based or cobalt-based superalloy component. The protective coating essentially consists of the following elements (in percent by weight): 25 to 40% nickel, 28 to 32% chromium, 7 to 9% aluminum, 1 to 2% silicon, 0.3 to 1% of at least one reactive element of the rare earths, at least 5% cobalt; and impurities, as well as selectively from 0 to 15% of at least one of the elements of the group consisting of rhenium, platinum, palladium, zirconium, manganese, tungsten, titanium, molybdenum, niobium, iron, hafnium, and tantalum. The total share of the elements of the group is from 0 to a maximum of 15% and a remainder of at least 5% cobalt. The component and the coating applied thereon have a ductile brittle transition temperature below 500.degree. C.Type: GrantFiled: December 6, 1995Date of Patent: February 4, 1997Assignee: Siemens AktiengesellschaftInventors: Norbert Czech, Friedhelm Schmitz
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Patent number: 5582635Abstract: A protective coating resistant to corrosion at medium and high temperatures is applied on a nickel-based or cobalt-based superalloy component. The protective coating essentially consists of the following elements (in percent by weight): 25 to 40% nickel, 28 to 32% chromium, 7 to 9% aluminum, 1 to 2% silicon, 0.3 to 1% of at least one reactive element of the rare earths, at least 5% cobalt; and impurities, as well as selectively from 0 to 15% of at least one of the elements of the group consisting of rhenium, platinum, palladium, zirconium, manganese, tungsten, titanium, molybdenum, niobium, iron, hafnium, and tantalum. The total share of the elements of the group is from 0 to a maximum of 15% and a remainder of at least 5% cobalt. The component and the coating applied thereon have a ductile brittle transition temperature below 500.degree. C.Type: GrantFiled: March 28, 1995Date of Patent: December 10, 1996Assignee: Siemens AktiengesellschaftInventors: Norbert Czech, Friedhelm Schmitz
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Patent number: 5543109Abstract: A high Cr austenitic heat resistant alloy excellent in high temperature strength which essentially consists of, in weight percent, from more than 0.02% to 0.10% C, not more than 1.0% Si, not more than 2.0% Mn, 28 to 38% Cr, 35 to 60% Ni, from more than 0.5% to 1.5% Ti, not more than 0.05% N, 0.01 to 0.3% Al, 0.001 to 0.01% B, 0 to 0.1% Zr, 0 to 1.0% Nb, one or both of 0.5 to 3.0% Mo and 1.0 to 6.0% W, and the balance being Fe and incidental impurities. The alloy may further contain one or both of 0.001 to 0.05% Mg and 0.001 to 0.05% Ca. This alloy is suitable for producing a single layered tube which is less expensive and more reliable than the conventional double layered tube.Type: GrantFiled: January 31, 1995Date of Patent: August 6, 1996Assignee: Sumitomo Metal Industries, Ltd.Inventors: Hiroyuki Senba, Yoshiatsu Sawaragi
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Patent number: 5529642Abstract: A nickel-based alloy which is excellent not only in anti-corrosion properties but also in workability is disclosed. The alloy contains 15 to 35 weight % of chromium; 6 to 24 weight % of molybdenum; wherein the sum of chromium plus molybdenum is no greater than 43 weight %; 1.1 to 8 weight % of tantalum; and balance nickel and unavoidable impurities. The alloy may optionally include no greater than 0.1 weight % of nitrogen; no greater than 0.3 weight % of magnesium, no greater than 3 weight % of manganese, no greater than 0.3 weight % of silicon, no greater than 0.1 weight % of carbon, no greater than 6 weight % of iron, no greater than 0.1 weight % of zirconium, no greater than 0.01 weight % of calcium, no greater than 1 weight % of niobium, no greater than 4 weight % of tungsten, no greater than 4 weight % of copper, no greater than 0.8 weight % of titanium, no greater than 0.8 weight % of aluminum, no greater than 5 weight % of cobalt, no greater than 0.Type: GrantFiled: September 19, 1994Date of Patent: June 25, 1996Assignee: Mitsubishi Materials CorporationInventors: Katsuo Sugahara, Hideo Kitamura, Saburo Wakita, Koji Toyokura, Yoshio Takizawa, Tsutomu Takahashi
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Patent number: 5384209Abstract: The present invention provides a hydridable material for the negative electrode of a nickel-hydride storage cell mainly comprising a Laves phase of the C14 hexagonal type (MgZn.sub.2), characterized by the general formula: ##EQU1## where A represents at least one element from Ti, Y, Ce, Ca, and Mg, and where M is chosen from Cr, V, and Si.Type: GrantFiled: October 22, 1993Date of Patent: January 24, 1995Assignee: SaftInventors: Jacques Bouet, Bernard Knosp, Annick Percheron-Guegan, Olivier Canet
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Patent number: 5294239Abstract: In section bars and shaped bodies made of nickel-base superalloys having a structure consisting of columnar grains, a complete recrystallization cannot be effected unless the heating-up rate is kept below a maximum heating-up rate T.sub.max, which depends on the ratio V of one or more of the metal carbide-forming elements hafnium, niobium, tantalum, titanium and zirconium to one or both of the metal carbide-forming elements tungsten and molybdenum.Type: GrantFiled: May 6, 1991Date of Patent: March 15, 1994Assignee: PM Hochtemperatur-Metall GmbHInventors: Klaus Zoltzer, Klaus Lempenauer, Hellmut Fischmeister
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Patent number: 5068084Abstract: An article exhibiting superior mechical properties and resistance to oxidation corrosion at elevated temperatures as described. The article has particular utility in gas turbine engines and is comprised of a nickel base superalloy consisting essentially of 3-10% Cr, 12.1-16% Co, 1.0-1.9% Mo, 3-10% W, 0-5% Re, 4-7% Al, 0-1.5% Ti, 0-8% Ta, 0.5-3% Hf, 0-2% Cb, 0-1% V, 0.02-0.12% Zr, 0.03-0.2% C, 0.005-0.25% B, 0-0.15% of an oxygen active element such as yttrium, balance essentially nickel. This composition is melted and directionally solidified in columnar grain form to provide useful articles.Type: GrantFiled: January 2, 1986Date of Patent: November 26, 1991Assignee: United Technologies CorporationInventors: Alan D. Cetel, David N. Duhl
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Patent number: 5019331Abstract: A heat-resistant alloy comprising, in % by weight, 0.3-0.8% of C, 0.5-3% of Si, over 0% to not greater than 2% of Mn, at least 23% to less than 30% of Cr, 40-55% of Ni, 0.2-1.8% of Nb, over 0.08% to not greater than 0.2% of N, 0.01-0.5% of Ti and/or 0.01-0.5% of Zr, and the balance Fe and inevitable impurities. The alloy is usable at high temperatures exceeding 1100.degree. C. with high creep rupture strength and excellent resistance to oxidation and to carburization, further exhibiting high creep deformation resistance at high temperatures and high ductility after aging.Type: GrantFiled: April 3, 1990Date of Patent: May 28, 1991Assignee: Kubota CorporationInventors: Teruo Yoshimoto, Makoto Takahashi
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Patent number: 5006308Abstract: The specification discloses nickel aluminide alloys including nickel, aluminum, chromium, zirconium and boron wherein the concentration of zirconium is maintained in the range of from about 0.05 to about 0.35 atomic percent to improve the ductility, strength and fabricability of the alloys at 1200.degree. C. Titanium may be added in an amount equal to about 0.2 to about 0.5 atomic percent to improve the mechanical properties of the alloys and the addition of a small amount of carbon further improves hot fabricability.Type: GrantFiled: June 9, 1989Date of Patent: April 9, 1991Assignee: Martin Marietta Energy Systems, Inc.Inventors: Chain T. Liu, Vinod K. Sikka
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Patent number: 4915907Abstract: The anisotropy typically observed in single crystal nickel base superalloys is reduced by intentionally adding certain small amounts of carbon, boron, zirconium or hafnium, either individually or in combination, to the alloy composition.Type: GrantFiled: January 19, 1988Date of Patent: April 10, 1990Assignee: United Technologies CorporationInventors: Dilip M. Shah, David N. Duhl
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Patent number: 4882125Abstract: Nickel-base, high chromium alloys characterized by good sulfidation and oxidation resistance consisting essentially of about 27 to 35% chromium, about 2.5 to 5% aluminum, about 2.5 to about 6% iron, 0.5 to 2.5% columbium, up to 0.1% carbon, up to 1% each of titanium and zirconium, up to 0.05% cerium, up to 0.05% yttrium, up to 1% silicon, up to 1% manganese, balance nickel.Type: GrantFiled: April 22, 1988Date of Patent: November 21, 1989Assignee: INCO Alloys International, Inc.Inventors: Gaylord D. Smith, Curtis S. Tassen
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Patent number: 4877435Abstract: A mechanically alloyed composition of matter or alloy containing 30-40% chromium, 5-25% cobalt, 0.5-10% iron, 0.2-0.6% aluminum, 0.3-1.2% titanium, up to 0.15% carbon, about 0.2-1% yttria, up to about 0.3% nitrogen, the % titanium being at least about 1.4 times the % nitrogen, minor amounts of optional elements, the balance being essentially nickel. The consolidated and hot worked alloy with coarse grains produced by heat treatment at about 1300.degree. C. is useful in service requiring hot strength along with extraordinary resistance to oxidation, sulfidation and hot corrosive media. Specific utilization of the alloy of the invention is contemplated in handling molten glass and in utensils adapted to be used in contact with molten glass, e.g. spinners.Type: GrantFiled: February 8, 1989Date of Patent: October 31, 1989Assignees: Inco Alloys International, Inc., Owens-Corning Fiberglas CorporationInventors: Ronald M. Haeberle, Jr., Gaylord D. Smith, John H. Weber, Roneldo L. Fisher, David J. Gaul, Jay W. Hinze
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Patent number: 4810467Abstract: A high temperature-resistant nickel-base alloy adapted for use in turbine nozzle components contains carefully balanced amounts of aluminum and titanium to render the alloy repair weldable. The levels of carbon and zirconium are also carefully controlled to improve the castability of the alloy so that large turbine components may be cast without hot tearing or microshrinkage.Type: GrantFiled: August 6, 1987Date of Patent: March 7, 1989Assignee: General Electric CompanyInventors: John H. Wood, John S. Haydon
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Patent number: 4784830Abstract: An oxidation resistant nickel-chromium based alloy possessing good stress rupture characteristics at elevated temperature and, in addition to nickel and chromium, containing correlated percentages of aluminum, titanium, nitrogen, carbon, etc.Type: GrantFiled: June 8, 1987Date of Patent: November 15, 1988Assignee: Inco Alloys International, Inc.Inventors: Pasupathy Ganesan, Gaylord D. Smith, Curtis S. Tassen, Jack M. Wheeler
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Patent number: 4767597Abstract: A heat-resistant alloy having excellent properties at high temperatures and useful for producing exhaust valves, comprises, in weight %, not more than 0.10% C, not more than 2.0% Si, not more than 2.0% Mn, from 35 to 50% Ni, from 17 to 25% Cr, from 3.2 to 5% Mo, from 2.0 to 3.2% Ti, from 0.5 to 1.5% Al, with the balance consisting essentially of Fe, wherein the weight ratio of Ti/Al is not more than 5/1. The alloy may further comprise at least one of B, Ca, and Mg, and/or at least one of Nb and Ta.Type: GrantFiled: May 2, 1985Date of Patent: August 30, 1988Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Kazuaki Nishino, Takuo Ito, Satosi Kato, Hidenori Yamaoka
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Patent number: 4731221Abstract: Nickel aluminides and nickel-iron aluminides treated with hafnium or zirconium, boron and cerium to which have been added chromium to significantly improve high temperature ductility, creep resistance and oxidation properties in oxidizing environments.Type: GrantFiled: October 11, 1985Date of Patent: March 15, 1988Assignee: The United States of America as represented by the United States Department of EnergyInventor: Chain T. Liu