Rare Earth Containing Patents (Class 420/40)
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Patent number: 7052561Abstract: A bulk amorphous alloy has the approximate composition: Fe(100?a?b?c?d?e)YaMnbTcMdXe wherein: T includes at least one of the group consisting of: Ni, Cu, Cr and Co; M includes at least one of the group consisting of W, Mo, Nb, Ta, Al and Ti; X includes at least one of the group consisting of Co, Ni and Cr; a is an atomic percentage, and a<5; b is an atomic percentage, and b?25; c is an atomic percentage, and c?25; d is an atomic percentage, and d?25; and e is an atomic percentage, and 5?e?30.Type: GrantFiled: August 12, 2003Date of Patent: May 30, 2006Assignee: UT-Battelle, LLCInventors: ZhaoPing Lu, Chain T. Liu
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Patent number: 7005105Abstract: The present invention relates to Fe—Cr—Ar type alloys with additions to improve workability thereof, strength, and heat resistance. The present Fe—Cr—Al alloy for electric resistance wires comprises a basic alloy added with only Be of below 0.01 wt % or with both Be and misch metal composed of rare earth elements wherein the basic alloy consists of a balance element of Fe, a Cr element of 12˜30 wt %, an Al element of 3˜14 wt %, a Zr element of 0.01˜1.5 wt %, and a Ti element of 0.001˜0.1 wt %. The present Fe—Cr—Al type alloys remarkably improve physical properties of Fe—Cr—Al ferritic alloys, especially, workability and mechanical properties, and heating characteristic.Type: GrantFiled: December 28, 2001Date of Patent: February 28, 2006Assignee: Korea Electrotechnology Research InstituteInventors: Hee Woong Lee, Su Dong Park
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Patent number: 6936217Abstract: A high temperature material which consists of a chromium oxide forming iron alloy including: a) 12 to 28 wt % chromium, b) 0.01 to 0.4 wt % La, c) 0.2 to 1.0 wt % Mn, d) 0.05 to 0.4 wt % Ti, e) less than 0.2 wt % Si, f) less than 0.2 wt % Al, wherein, at temperatures of 700° C. to 950° C., the high temperature material is capable of forming a Mn Cr2O4 spinel phase. At a temperature of 700° C. to 950° on Mn, Cr2O4 the spinel phase formed protects a body, such as spark plug electrodes and other electrodes.Type: GrantFiled: November 18, 2002Date of Patent: August 30, 2005Assignee: Forschungszentrum Jülich GmbHInventors: Willem Joseph Quadadakkers, Vladimir Shemet, Lorenz Singheiser
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Patent number: 6905651Abstract: A ferritic stainless steel alloy useful as a substrate for catalytic converter material consists of, by weight: 15-21% Cr, 8-12% Al, 0.01-0.09% Ce, 0.02-0.1% total of REM, and possible minor amounts of further elements, other than the ones mentioned, the balance being Fe with normally occurring impurities. These alloys have managed to combine a high content of Al with a good hot and cold workability.Type: GrantFiled: November 8, 2002Date of Patent: June 14, 2005Assignee: Sandvik ABInventors: Simon Johansson, Bo Rogberg
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Patent number: 6846575Abstract: An article includes turbulation material bonded to a surface of a substrate via a bonding agent, such as a braze alloy. In an embodiment, the turbulation material includes a particulate phase of discrete metal alloy particles having an average particle size within a range of about 125 microns to about 4000 microns. Other embodiments include methods for applying turbulation and articles for forming turbulation.Type: GrantFiled: June 5, 2003Date of Patent: January 25, 2005Assignee: General Electric CompanyInventors: Wayne Charles Hasz, Robert Alan Johnson, Ching-Pang Lee, Mark Gerard Rettig, Nesim Abuaf, John Howard Starkweather
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Patent number: 6776956Abstract: Provided is a steel for separators of solid-oxide type fuel cells, which forms oxide films having good electrical conductivity at 700 to 950° C. or so, has good oxidation resistance and, in particular, resistance to exfoliation even in the case of long hours of use, is excellent in impact properties at room temperature, shows a small difference in thermal expansion from the electrolyte, and is inexpensive. This steel for separators of solid-oxide fuel cells includes, by mass %, not more than 0.2% C, not more than 1.0% Si, not more than 1.0% Mn, not more than 2% Ni, 15 to 30% Cr, not more than 1% Al, one or more elements selected from the group of not more than 0.5% Y, not more than 0.2% REM and not more than 1% Zr, and the balance of Fe and unavoidable impurities. In this steel, amounts of S, O, N and B in the unavoidable impurities are restricted to not more than 0.015%, not more than 0.010%, not more than 0.050% and not more than 0.Type: GrantFiled: April 26, 2002Date of Patent: August 17, 2004Assignee: Hitachi Metals Ltd.Inventors: Toshihiro Uehara, Akihiro Toji, Takehiro Ohno
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Patent number: 6719855Abstract: The present invention provides an Fe—Cr—Al-based alloy for catalyst carriers and a foil thereof having a thickness of 40 &mgr;m or less, the alloy and the foil improved in the oxidation resistance at high temperatures and having excellent deformation resistance. Specifically, the present invention provides an Fe—Cr—Al-based alloy foil and a manufacturing method thereof, comprising 16.0 to 25.0 mass % of Cr, 1 to 8 mass % of Al, La, Zr, and the balance being Fe and incidental impurities. The contents by mass % of La and Zr meet the following ranges when the foil thickness thereof is t &mgr;m: 1.4/t≦La≦6.0/t (1) 0.6/t≦Zr≦4.0/t (2) The Fe—Cr—Al-based alloy foil may further comprises Hf and the balance being Fe and incidental impurities, wherein the contents by mass % of La, Zr, and Hf meet the following ranges: 1.4/t≦La≦6.0/t (1) 0.4/t≦Zr≦2.0/t (3) 0.5/t≦Hf≦2.0/t (4).Type: GrantFiled: February 27, 2002Date of Patent: April 13, 2004Assignee: JFE Steel CorporationInventors: Kunio Fukuda, Susumu Satoh, Kazuhide Ishii, Takeshi Fujihira, Akira Kawaharada
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Publication number: 20040005477Abstract: The invention relates to a product (1), in particular a gas-turbine blade (1), having a metallic basic body (2) to which a protective layer (3, 4) for protecting against corrosion is bonded. The protective layer (3, 4) has an inner layer (3) of a first MCrAlY alloy and an outer layer (45) having a second MCrAlY alloy, which is bonded to the inner layer (3). The second MCrAlY alloy is predominantly in the &ggr;-phase. The invention also relates to a process for producing a protective layer (3, 4) in which the outer layer (4) is produced by re-melting a region of the inner layer (3) or by deposition of an MCrAlY alloy from a liquid phase.Type: ApplicationFiled: June 25, 2003Publication date: January 8, 2004Applicant: SIEMENS AKTIENGESELLSCHAFTInventor: Werner Stamm
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Patent number: 6652991Abstract: The addition of small amounts of CeO2 and Cr to intermetallic compositions of NiAl and FeAl improves ductility, thermal stability, thermal shock resistance, and resistance to oxidation, sulphidization and carburization.Type: GrantFiled: October 9, 2002Date of Patent: November 25, 2003Assignee: The Governors of the University of AlbertaInventors: You Wang, Weixing Chen
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Patent number: 6582652Abstract: The present invention is directed towards an austenitic, stainless steel series 300 alloy having improved biocompatible characteristics. The modified stainless steel alloy consists essentially of, in weight percent, about C Mn Si P S Cr Mo ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 Ni Fe “X” 6.5-7.5 46.185-74.000 5.0-10.0 whereby variable “X” could be comprised from a group consisting of Gold, Osmium, Palladium, Platinum, Rhenium Tantalum, or Tungsten. The alloy provides a unique combination of strength, ductility, corrosion resistance, and other mechanical properties which also has improved biocompatible characteristics.Type: GrantFiled: May 11, 2001Date of Patent: June 24, 2003Assignee: Scimed Life Systems, Inc.Inventor: Charles Horace Craig
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Patent number: 6582835Abstract: Dip-coated ferrite stainless steel sheet usable in the automobile exhaust sector, characterized in that it comprises a steel core with the following composition by weight: 10.5%≦chromium≦20% 0%≦aluminum≦0.6% 0.003%≦carbon≦0.06% 0.003%≦nitrogen≦0.04% 0%≦silicon≦0.6% 0%≦manganese≦0.6% 0%≦sulfur≦0.002% iron and impurities inherent in processing, and a metal coating deposited by dipping the strip in a molten metal bath containing in particular aluminum and at least one rare earth element: cerium, lanthanum, praseodymium, neodymium, mixed metal and/or yttrium.Type: GrantFiled: March 29, 2001Date of Patent: June 24, 2003Assignee: UsinorInventors: Laurent Antoni, Raphael Craen
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Publication number: 20030102057Abstract: A stainless steel alloy that exhibits both high strength and toughness as a result of having particular ranges for chemistry, tempering temperatures and grain size. The alloy is a precipitation-hardened martensitic stainless steel with an ultimate tensile strength of at least 1200 MPa, a Charpy impact toughness of greater than 55 J, and a grain size of ASTM 5 or finer. The alloy consists essentially of, by weight, 14.0 to 16.0 percent chromium, 6.0 to 7.0 percent nickel, 1.25 to 1.75 percent copper, 0.5 to 1.0 percent molybdenum, 0.03 to 0.5 percent carbon, niobium in an amount by weight of ten to twenty times greater than carbon, the balance iron, minor alloying constituents and impurities.Type: ApplicationFiled: October 23, 2001Publication date: June 5, 2003Inventor: John William Short
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Publication number: 20030063994Abstract: Provided is a steel for separators of solid-good oxide type fuel cells, which forms oxide films having electrical conductivity at 700 to 950° C. or so, has good oxidation resistance and, in particular, resistance to exfoliation even in the case of long hours of use, is excellent in impact properties at room temperature, shows a small difference in thermal expansion from the electrolyte, and is inexpensive.Type: ApplicationFiled: April 26, 2002Publication date: April 3, 2003Applicant: HITACHI METALS, LTD.Inventors: Toshihiro Uehara, Akihiro Toji, Takehiro Ohno
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Publication number: 20030059335Abstract: A high temperature material which consists of a chromium oxide forming iron alloy including:Type: ApplicationFiled: November 18, 2002Publication date: March 27, 2003Inventors: Willem Joseph Quadadakkers, Vladimir Shemet, Lorenz Singheiser
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Patent number: 6391253Abstract: The present invention provides a stainless steel being excellent in workability, corrosion resistance and antibacterial property. To be more specific, a stainless steel containing 10 wt % or more of Cr is rendered to contain 0.0001-1 wt % of Ag, or further one or more members selected from Sn: 0.0002-0.02 wt %, Zn: 0.0002-0.02 wt %, Pt: 0.0002-0.01 wt %, and, in addition, is rendered to dispersedly contain a total of 0.001 % or more in an area percentage of one or more members of a silver particle, a silver oxide and a silver sulphide each having a mean grain diameter of 500 &mgr;m or less. To disperse the silver particle, silver oxide and silver sulphide uniformly, the casting rate of continuous casting is preferably controlled to range from 0.8 to 1.6 m/min.Type: GrantFiled: November 5, 1999Date of Patent: May 21, 2002Assignee: Kawasaki Steel CorporationInventors: Misako Tochihara, Takeshi Yokoto, Susumu Satoh, Sadao Hasuno
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Publication number: 20020051727Abstract: This invention relates to an alloy suitable for use in industrial and other heating applications, having a ferritic stainless steel alloy comprising, in weight %, less than 0.02% carbon; ≦0.5% silicon; ≦0.2% manganese; 10.0-40.0% chromium; ≦0.6% nickel; ≦0.01% copper; 2.0-10.0% aluminum; one or more of Sc, Y, La, Ce, Ti, Zr, Hf, V, Nb and Ta in an amount of 0.1-1.0; remainder iron and unavoidable impurities. A heating element of this alloy is provided. A diffusion furnace having such a heating element is also provided.Type: ApplicationFiled: August 30, 2001Publication date: May 2, 2002Inventor: Roger Berglund
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Patent number: 6355212Abstract: The invention is directed to anti-corrosive alloys and relates in particular to an alloy containing cobalt, chromium, aluminum, yttrium, silicon, a metal from the second main group, together with the corresponding oxide, in the following proportions: chromium (Cr) 26.0-30%; aluminum (Al) 5.5-13.0%; yttrium (Y) 0.3-1.5%; silicon (Si) 1.5-4.5%; metal from the second main group (magnesium, calcium, barium, strontium) 0.1-2.0%; oxide of the corresponding metal from the second main group 0.1-2.0%; cobalt (Co) remaining percentage. Preferably, tantalum (Ta) is also added in a proportion of 0.5-4.0%, and the remaining percentage of cobalt is replaced by a remaining percentage of Me, Me being understood to mean a metal which may be nickel (Ni) or iron (Fe) or cobalt (Co) or a composition comprising Ni—Fe—Co, Ni—Fe, Ni—Co, Co—Fe.Type: GrantFiled: January 5, 2000Date of Patent: March 12, 2002Assignee: Turbocoating SpAInventor: Nelso Antolotti
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Publication number: 20020012601Abstract: A metal foil substrate material with improved formability properties for catalytic converters and a method of making the material in which layers of ferritic stainless steel and aluminum are solid state metallurgically bonded together forming a composite material. Such composite material is further rolled to an intermediate foil gauge and then subjected to a thermal in situ reaction to form a resulting uniform solid solution foil material with superior high temperature corrosion resistance. This uniform solid solution material is then rolled to the final foil gauge.Type: ApplicationFiled: May 26, 1999Publication date: January 31, 2002Inventors: ISRAIL M. SUKONNIK, CHEN-CHUNG S. CHANG, BIJENDRA JHA
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Patent number: 6303904Abstract: An object of the present invention is to provide a weld material which contains 8 to 13% Cr, and can be used with the GMA welding method, a GMA welding method which has superior arc stability and can provide a welded material having superior properties, and a welded structure; in order to attain this object, a weld material is provided, which contains in weight, 0.01 to 0.15% C, 0.1 to 0.6% Si, 0.1 to 2.0% Mn, 8 to 13% Cr, 0.1 to 1.5% Ni, 0.3 to 2.0% Mo, 0.05 to 0.5% V, 0.08 to 0.5% W, 0.5 to 5.0% Co, 0.1 to 0.5% Ta, ≦0.08 N, 0.01 to 0.1% REMs, and consisting of the balance Fe with inevitable impurities.Type: GrantFiled: January 8, 2001Date of Patent: October 16, 2001Assignees: Mitsubishi Heavy Industries, Ltd., Nippon Welding Rod Co., Ltd.Inventors: Kiyotaka Iwatsubo, Toshimitsu Tetsui, Takayuki Kawano, Hideharu Kobayashi, Youzaburo Mabuchi, Hiroshi Tsurusaki, Tamao Takatsu, Teiichiro Saito, Takashi Inami
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Patent number: 6294131Abstract: A steel composition particularly useful for components of solid oxide fuel cells, for example a connector plate for collecting electrical current from a solid oxide fuel cell, consisting of, in weight percent, 18-28.5 Cr, 0.001-0.20 C, <0.1 Si, 0.005-0.10 Mn, <1.0 Ni, <0.25 N, <0.05 S, <0.08 P, <0.06 Al, <0.25 Additional Defined Metals, and 0.005-0.50 REM, wit the residue iron, excluding incidental impurities, where Additional Defined Metals is the sum of titanium, niobium, vanadium, molybdenum and copper, and REM is one or more of the rare earth metal elements in the group of the lanthanide elements 57 to 71, scandium and yttrium.Type: GrantFiled: July 14, 2000Date of Patent: September 25, 2001Assignee: Ceramic Fuel Cells LimitedInventor: Donald Jaffrey
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Publication number: 20010002296Abstract: An iron aluminide coating consists essentially of: 1 5-35% by weight aluminum 15-25% by weight chromium 0.5-10% by weight molybdenum, tungsten, tantalum and niobium 0-0.Type: ApplicationFiled: December 14, 2000Publication date: May 31, 2001Inventors: Mohamed Nazmy, Markus Staubli
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Patent number: 6203632Abstract: The invention relates to iron-chromium aluminum metal foil which is resistant to high-temperature oxidation. Said metal foil is produced by hot-dip aluminizing an iron-chromium support band with an aluminum-silicon alloy. The foil has the following composition in weight percent: 18-25% Cr. 4-10% Al, 0.03-0.08% Y, max. 0.01% Ti, 0.01-0.05% Zr, 0.01-0.05% Hf, 0.5-1.5% Si. It also contains residual iron and impurities resulting from the method of production. The total aluminum content of the coated metal foil is at least 7% near the surface and not less than 3% further inside.Type: GrantFiled: July 1, 1999Date of Patent: March 20, 2001Assignee: Krupp VDM GmbHInventors: Ulrich Heubner, Angelika Kolb-Telieps, Ralf Hojda
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Patent number: 6146582Abstract: A new austenitic stainless steel alloy is provided (in wt. %) according to the following analysis:C: less than 0.12%;Si: less than 1.0%;Cr: 16-22%;Mn: less than 2.0%;Ni: 8-14%;Mo: less than 1.0%;S: less than 0.03%;O: less than 0.03%;N: less than 0.05%;La: between 0.02% and 0.11%; andone of the following:(i) Ti in an amount at least 4 times the amount of carbon and 0.80% or less, or(ii) Nb in an amount at least 8 times the amount of carbon and 1.0% or less;the remainder Fe and normally occurring impurities. The new steel is particularly suitable as a super heater steel and a heat exchanger steel.Type: GrantFiled: December 4, 1998Date of Patent: November 14, 2000Assignee: Sandvik ABInventor: Johan Linden
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Patent number: 6048601Abstract: Disclosed is soft magnetic alloy powder for electromagnetic and magnetic shield, which can be easily flattened and exhibits good performance over a high frequency band, and a shielding member of good shield effect prepared by dispersing the powder in a matrix of rubber or plastics. Powder of a soft magnetic alloy, which consists essentially of, by weight %, Cr: 0.5.0-20%, Si: 0.01-0.5%, Al: 0.01-20% and the balance of Fe and inevitable impurities, is flattened in an attritor, and is added to the matrix material at a content of 30 wt. % or higher, preferably, as high as possible, and processed to form sheets or molded articles. The shielding member of particularly high flame resistance is prepared by adding soft magnetic alloy powder of alloy composition consisting essentially of, by weight %, Cr: 5-14%, Si: 0.01-0.5%, Al: 0.5-20%, and preferably, REM: up to 0.Type: GrantFiled: January 20, 1998Date of Patent: April 11, 2000Assignee: Daido Steel Co., Ltd.Inventors: Shin'ichiro Yahagi, Akihiko Saito, Michiharu Ogawa
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Patent number: 5948182Abstract: A heat resisting steel consists essentially of 0.005-0.20% of C, 0.01-2.0% of Si, 0.1-2.0% of Mn, 20-30% of Ni, 10-20% of Cr, 3.0-4.5% of Ti and 0.1-0.7% of Al with the ratio Ti/Al being 5-20, and the balance being substantially Fe, which is excellent in the tensile properties at the room temperature and 700.degree. C., and the creep rupture properties at the temperature of 700.degree. C.Type: GrantFiled: October 8, 1996Date of Patent: September 7, 1999Assignee: Daido Tokushuko Kabushiki KaishaInventors: Shuji Hamano, Tomotaka Nagashima, Michio Okabe, Toshiharu Noda
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Patent number: 5945064Abstract: This invention provides a welding material for low chromium (Cr) ferritic heat-resisting steel having high toughness, wherein the chemical composition of welding metal comprises, in weight %, carbon (c) 0.04-0.1%, silicon (Si) 0.1-0.6%, manganese (Mn) 0.1-0.6%, phosphorus (P) 0.0005-0.03%, sulfur (S) 0.0005-0.015%, chromium (Cr) 1.75-2.5%, nickel (Ni) 0.01-0.8%, molybdenum (Mo) 0.05-1.5%, vanadium (V)0.01-0.5%, tungsten (W) 0.05-2%, niobium (Nb) 0.01-0.2%, tantalum (Ta) 0.01-0.5%, aluminum (Al) 0.003-0.05%, boron (B) 0.0001-0.01%, nitrogen (N) 0.003-0.03%, and the remainder comprises iron and inevitable impurities. The welding material satisfies the following formula: C+Cr/20+Mo/15+V/10+W/7+5B.ltoreq.0.8%. According to this invention, the welding material is suitable for welding low Cr ferritic heat-resisting steels having high strength such as those used in steam generators and heat exchangers of boilers, etc.Type: GrantFiled: April 9, 1998Date of Patent: August 31, 1999Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Nobuyoshi Komai, Takayuki Kawano, Fujimitsu Masuyama, Iwami Ishihara, Tomomitsu Yokoyama
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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: 5939018Abstract: Martensitic stainless steels that enable the fabrication of high-strength seamless steel pipe suited for use in oil-well pipe and pipeline tubing by means of a Mannesmann plug mill or Mannesmann mandrel mill process, without the formation of defects during production. The heat workability of these steels, which contain no more than 0.30% by weight of carbon and from 11 to 14% by weight of chromium, and have a ferrite content of at least 40% at 1200.degree. C., has been vastly improved by holding the phosphorus and sulfur levels therein to no more than 0.020% and 0.003% by weight, respectively.Type: GrantFiled: November 29, 1996Date of Patent: August 17, 1999Assignee: Kawasaki Steel CorporationInventors: Hiroshi Ohtsubo, Tatsuo Kawasaki, Isao Takada
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Patent number: 5906791Abstract: A steel comprises additives including rare earth elements, boron and at least one of rhenium, osmium, iridium, ruthenium, rhodium. The steel exhibits resistance to embrittlement, oxidation and creep. The steel also comprises balanced amounts of nickel and cobalt to minimize a ratio of nickel to cobalt, and optimize aging embrittlement resistance with as tempered toughness. The steel comprises, by weight percent: at least one of rhenium, osmium, iridium, ruthenium, rhodium (0.01 to 2.00); rare earth element (0.50 max.); boron (0.001-0.04); carbon (0.08-0.15); silicon (0.01-0.10); chromium (8.00-13.00); at least one of tungsten and molybdenum (0.01 to 2.00); at least one austenite stabilizer; such as nickel, copper, cobalt and manganese (0.001-6.00); vanadium (0.25-0.40); phosphorus (0.010 max.); sulfur (0.004 max.); nitrogen (0.060 max.); hydrogen (2 ppm max.); oxygen (50 ppm max.); aluminum (0.001-0.025); arsenic (0.0060 max.); antimony (0.0030 max.); tin (0.0050 max.); iron (balance).Type: GrantFiled: July 27, 1998Date of Patent: May 25, 1999Assignee: General Electric CompanyInventor: Thomas Martin Angeliu
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Patent number: 5879619Abstract: A high-Cr and high-Ni alloy of the invention comprises the following chemical composition and has excellent corrosion resistance to hydrogen sulfide in an environment where a partial pressure of hydrogen sulfide is about 1 atm., or below and the temperature is about 150.degree. C. The alloy is free of any expensive Mo and W and is thus inexpensive, with the attendant feature that mass production is possible: Si: 0.05-1.0%, Mn: 0.1-1.5%, Cr: 20-30%, Ni: 20-40%, sol. Al: 0.01-0.3%, Cu: 0.5-5.0%, REM: 0-0.10%, Y: 0-0.20%, Mg: 0-0.10%, Ca: 0-0.10%, and balance: Fe and incidental impurities, provided that C, P and S in the incidental impurity are, respectively, 0.05% or below, 0.03% or below and 0.01% or below. As set out above, each of REM, Y, Mg and Ca do not have to be added at all. If these elements are used, one or more of REM, Y, Mg and Ca are added. Preferable ranges of the contents of these elements when added are such that REM: 0.001-0.10%, Y: 0.001-0.20%, Mg: 0.001-0.10%, and Ca: 0.001-0.10%.Type: GrantFiled: May 5, 1997Date of Patent: March 9, 1999Assignee: Sumitomo Metal Industries, Ltd.Inventor: Masakatsu Ueda
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Patent number: 5866065Abstract: Ferritic stainless steel which resists oxidation at high temperature, of use in particular for a catalyst support structure, such as for example structures contained in the exhaust pipes of motor vehicles. This stainless steel comprises by weight:12 to 25% chromium, 4 to 7% aluminium, less than 0.03% carbon, less than 0.02% nitrogen, less than 0.22% nickel, less than 0.002% sulphur,less than 0.6% silicon, less than 0.4% manganese,the active elements selected from the group comprising cerium, lanthanum, neodymium, praseodymium, yttrium taken alone or in combination, at a content of lower than 0.08%, at least one stabilizing element selected from the group comprising zirconium and niobium,the zirconium and/or niobium contents satisfying the following conditions:for the zirconium,(C%/12+N%/14)-0.1.ltoreq.Zr.ltoreq.91 (C%/12+N%/14)+0.1for the niobium,93.times.0.8(C%/12)-0.1.ltoreq.Nb .ltoreq.93.times.0.8(C%/12)+0.15 and Nb<0.3%,for the zirconium and the niobium,91(N%/14)-0.05.ltoreq.Zr .ltoreq.91(N%/14)+0.Type: GrantFiled: March 29, 1996Date of Patent: February 2, 1999Assignee: Usinor SacilorInventors: Jean-Marc Herbelin, Marc Mantel, Jean-Yves Cogne
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Patent number: 5855844Abstract: A precipitation hardenable, martensitic stainless steel alloy is disclosed consisting essentially of, in weight percent, about______________________________________ C 0.03 max Mn 1.0 max Si 0.75 max P 0.040 max S 0.020 max Cr 10-13 Ni 10.5-11.6 Ti 1.5-1.8 Mo 0.25-1.5 Cu 0.95 max Al 0.25 max Nb 0.3 max B 0.010 max N 0.030 max Ce 0.001-0.025 ______________________________________the balance essentially iron. The disclosed alloy provides a unique combination of stress-corrosion cracking resistance, strength, and notch toughness even when used to form large cross-section pieces. A method of making such an alloy includes adding cerium during the melting process in a amount sufficient to yield an effective amount of cerium in the alloy product.Type: GrantFiled: August 6, 1997Date of Patent: January 5, 1999Assignee: CRS Holdings, Inc.Inventor: James W. Martin
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Patent number: 5840135Abstract: Articles of manufacture are made of aluminum-beryllium alloys having substantially randomly distributed aluminum-rich and beryllium rich phases to provide substantially isotropic mechanical properties, such as high stiffness and low co-efficients of thermal expansion, whereby the articles of manufacture provide more rapid and accurate responses.Type: GrantFiled: May 2, 1996Date of Patent: November 24, 1998Assignee: Brush Wellman Inc.Inventors: Larry A. Grant, James M. Marder, Wayne L. Wright
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Patent number: 5827476Abstract: A new austenitic stainless steel comprising in % by weight:C: <0.12,Si: <1.0,Cr: 16-22,Mn: <2.0,Ni: 8-14,Mo: <1.0,either Ti: >4% by weight of C and <0.8 or Nb: 8% by weight of C and <1.0,S: <0.03,O: <0.03,N: <0.05,REM: .ltoreq.0.30 and >0.10, and the remainder Fe and normally occurring impurities, REM being one or more of the elements Ce, La, Pr and Nd. The new steel is particularly suitable as a superheater steel and a heat exchanger steel.Type: GrantFiled: February 24, 1997Date of Patent: October 27, 1998Assignee: Sandvik ABInventors: Johan Linden, Jonas Rosen
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Patent number: 5824264Abstract: A high-temperature austenitic stainless steel having improved weldability is disclosed. The steel consists essentially, by weight, of:C: 0.05%-0.15%, Si: less than 1.0%, Mn: 2.0% or less,P: 0.04% or less, S: 0.01% or less, Cr: 20%-30%,Ni: 10%-15%, N: 0.10%-0.30%,B: 0.0010%-0.01%,one or two of La and Ce: 0.01%-0.10% in total,Al: 0.01%-0.20%, anda balance of Fe and incidental impurities, wherein the contents of N and Al satisfy the following inequality:% N+2.times.% Al.ltoreq.0.500%and the value for Ni balance (Ni bal.) of the steel calculated by the following formula is in the range of from -1.0% to +3.0%:Ni bal. (%)=% Ni+0.5.times.% Mn+30.times.(% C+% N)-1.1.times.(% Cr+1.5.times.% Si)+8.2.Type: GrantFiled: July 25, 1996Date of Patent: October 20, 1998Assignee: Sumitomo Metal Industries, Ltd.Inventors: Hideki Uno, Yoshitaka Nishiyama, Yoshiatsu Sawaragi, Nobuo Otsuka, Kazuhiro Ogawa, Toshiro Anraku
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Patent number: 5820818Abstract: The ferritic stainless steel of the present invention contain the following main chemical elements, in which a relationship between B and Gd, preferably, satisfies the following equation (1) on the weight % basis:______________________________________ C: less than 0.01% Mn: not more than 1% Ni: not more than 0.7% Cr: 13-26% B: 0.1-1.1% Gd: 0.05-1.5% Al: 0.002-0.1% N: not more than 0.015%. ______________________________________The austenitic stainless steel of the present invention contain the following main chemical elements, in which a relationship between B and Gd, preferably, satisfies the following equation (1) on the weight % basis: ______________________________________ C: not more than 0.02% Mn: 0.1-0.9% Ni: 7-22% Cr: 18-26% B: 0.05-0.75% Gd: 0.11-1.5% Al: 0.005-0.1% N: not more than 0.03%.Type: GrantFiled: December 3, 1997Date of Patent: October 13, 1998Assignee: Sumitomo Metal Industries, Ltd.Inventor: Haruhiko Kajimura
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Patent number: 5820817Abstract: A stainless steel comprises additives including at least one of rare earth elements and boron, so as to exhibit resistance to long term aging embrittlement. The stainless steel also contains balanced amounts of nickel and cobalt to minimize a ration of nickel to cobalt and optimize aging embrittlement resistance with as tempered toughness. The remainder of the stainless steel comprising, by weight percentage:______________________________________ Carbon 0.08-0.15 Silicon 0.01-0.10 Chromium 8.00-13.00 At least one of Tungsten and Molybdenum 0.50-4.00 At least one Austenite stabilizer, 0.001-6.00 such as Nickel, Cobalt, Manganese and Copper Vanadium 0.25-0.40 Phosphorus 0.010 max. Sulfur 0.004 max. Nitrogen 0.060 max. Hydrogen 2 ppm max. Oxygen 50 ppm max. Aluminum 0.001-0.025 Arsenic 0.0060 max. Antimony 0.0030 max. Tin 0.0050 max. Iron Balance.Type: GrantFiled: July 28, 1997Date of Patent: October 13, 1998Assignee: General Electric CompanyInventors: Thomas Martin Angeliu, Clyde Leonard Briant, Charles Gitahi Mukira
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Patent number: 5800152Abstract: Metallic materials which possess suitable characteristics for serving as an intermediate layer between a thermal barrier coating and a matrix substrate, or as a separator for a solid oxide fuel cell, contain 15 to 40 wt % Cr, 5 to 15 wt % W, 0.01 to 1 wt % M (where M is one or more than two elements chosen from Y, Hf, Ce, La, Nd, and Dy), 0.001 to 0.01 wt % B and a balance of Fe. The average value of the coefficient of thermal expansion of the metallic material is in a range from more than 12.0.times.10.sup.-6 /K to less than 13.0.times.10.sup.-6 /K in a temperature range from room temperature to 1,000.degree. C., and the value is close to that of stabilized zirconia. The metallic materials display excellent high temperature oxidation resistance.Type: GrantFiled: February 14, 1997Date of Patent: September 1, 1998Assignee: Sumitomo Special Metals Company, LimitedInventors: Hitoshi Taimatu, Masami Ueda
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Patent number: 5772956Abstract: A martensitic heat resistant steel is provided which has improved high temperature creep strength, contains Co and, at a temperature of 600.degree. C. or above, does not form an intermetallic compound substantially having a composition of Cr.sub.40 Mo.sub.20 Co.sub.20 W.sub.10 C.sub.2 --Fe. In a heat-resistant steel, containing not less than 8% of Cr, with Co, Mo, and W being simultaneously added thereto, a combination of the addition of a very small of Mg, Ba, Ca, Y, Ce, La and the like, with the addition of a minor amount of Ti and Zr, inhibits the precipitation of an intermetallic compound substantially having a composition of Cr.sub.40 Mo.sub.20 Co.sub.20 W.sub.10 C.sub.2 --Fe, thereby ensuring high temperature creep strength.Type: GrantFiled: October 11, 1996Date of Patent: June 30, 1998Assignee: Nippon Steel CorporationInventors: Yasushi Hasegawa, Masahiro Ohgami, Hisashi Naoi
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Patent number: 5672315Abstract: A superplastic dual-phase stainless steel comprises C: not more than 0.05 wt %, Si: not more than 1.5 wt %, Mn: not more than 3.0 wt %, Cr: 17.0-26.0 wt %, Ni: 3.0-10.0 wt %, Mo: 0.1-2.0 wt %, N: 0.08-0.20 wt %, S: not more than 0.002 wt %, B: 0.0005-0.01 wt % and the remainder being Fe and inevitable impurities and has a low deformation resistance and an excellent elongation.Type: GrantFiled: November 3, 1995Date of Patent: September 30, 1997Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Nobuyoshi Okato, Hiroshi Yoshida, Nobuya Koide
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Patent number: 5665669Abstract: A metallic honeycomb body for supporting a catalyst comprises a flat plate and a corrugated plate; these plates are formed by a foil of stainless steel in which the steel contains more than 1% of Si and the surface of the steel is covered by a film which is mainly formed by an oxide chrome at a high temperature, and are mutually bonded by diffusion bonding.The chemical composition of the foil material is comprised of up to 0.2% of C, more than 1 to 5% of Si, 9 to 22% of Cr, up to 0.8% of Al, and as necessary, at least one member selected from the group of Nb, V, Mo W and REM (rare earth member) including Y.The metallic honeycomb body is formed by which said body is annealed at a vacuum degree of 10.sup.-2 to 10.sup.-4 Torr and in a temperature range of 1200.degree. to 1300.degree. C. for 1 to 30 minutes in a vacuum annealing furnace.Type: GrantFiled: October 12, 1994Date of Patent: September 9, 1997Assignee: Nippon Steel CorporationInventors: Mikio Yamanaka, Masuhiro Fukaya, Nobuhiro Fujita, Yasushi Ishikawa, Toshikazu Nakagawa, Masao Yashiro, Hitoshi Ohta
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Patent number: 5656104Abstract: The present invention aims to provide a metal mold for glass, which needs not apply any swab in molding of glass, enabling no-swabbing glass forming. The alloy for the mold comprises by weight Cu: 10 to 80%, Al: 4 to 11%, Cr: 3 to 16%, Ni: 2 to 36%, and at least one rare earth element: 0.02 to 2.08 with the balance consisting of Fe and further comprises at least one member selected from the group consisting of Ti: Al %.times.0.5 to 2, V: Al %.times.0.2 to 1, Zr: Al %.times.0.1 to 0.3, and Nb: Al %.times.0.1 to 0.3. The alloy is gradually cooled from the solidification initiation temperature to 500.degree. C. at a cooling rate of 10.degree. C./min. The surface of the mold is coated with an Al-containing coating or roughened to an average roughness of 0.3 to 5 .mu.m. A solid lubricating film is provided in a fitting portion of the mold, or alternatively a self-lubricating solid is embedded in the fitting portion of the mold.Type: GrantFiled: June 7, 1995Date of Patent: August 12, 1997Assignee: Nippon Steel CorporationInventors: Hiroto Imamura, Michio Endo, Syoichi Sekiguchi, Shigeki Ogura, Isao Arikata, Mitsuji Hirata, Koji Akafuji, Hirokazu Taniguchi, Toru Ono
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Patent number: 5578265Abstract: The invention provides a ferritic stainless steel alloy useful for strip steel used in exhaust catalytic converters, consisting essentially of in weight %, .ltoreq.0.02% C, 19-21% Cr, 4.5-6% Al, 0.01-0.03% Ce, 0.02-0.05% total of rare earth elements, .gtoreq.0.015% total Mg+Ca, and balance Fe plus impurities. The alloy can contain 0.2-0.4% Mn, 0.1-0.4% Si, .ltoreq.0.5% Ni, .ltoreq.0.02% P, .ltoreq.0.005% S, .ltoreq.0.025% N, 0.015-0.025% Mg, 0.0005-0.0018% Ca, 0.005-0.015% La, 0.02-0.03% Ce, .ltoreq.0.015% Ti and .ltoreq.0.015% Zr.Type: GrantFiled: August 17, 1995Date of Patent: November 26, 1996Assignee: Sandvik ABInventors: Lars Ericson, Jan Kutka
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Stainless steel member for semiconductor fabrication equipment and surface treatment method therefor
Patent number: 5569334Abstract: Stainless steel member for semiconductor fabrication equipment having a passive state coating on the surface of the stainless steel comprising, in weight percent, 0.1% or less of C, 2.0% or less of Si, 3.0% or less of Mn, 10% or more of Ni, 15 to 25% of Cr, 1.5 to 4.5% of Mo, 0.5% or less of one or more rare earth element and Fe for substantially the whole remainder. Said passive state coating has a pitting potential of at least 900 mV (when the current density of the anode polarization curve determined with a potentiostat in 3.5% aqueous sodium chloride solution is 10 .mu.A/cm.sup.2) and has a thickness of 0.5 to 20 nm. The invention also includes a surface treatment method for the stainless steel.Type: GrantFiled: December 7, 1993Date of Patent: October 29, 1996Assignee: Hitachi Metals, Ltd.Inventors: Tsunehiro Kawata, Katsuhiko Kojo, Youichiro Kazama, Takayuki Fukaya, Toshihiko Tsujimura -
Patent number: 5489416Abstract: Exhaust equipment members are made of a heat-resistant, austenitic cast steel having a composition consisting essentially, by weight, of 0.1-0.6% of C, less than 1.5% of Si, 1% or less of Mn, 8-20% of Ni, 15-30% of Cr, 0.2-1% of Nb, 2-6% of W, 0.001-0.01% of B, 0.02-0.3% of S and/or 0.001-0.1% of REM (Ce, La, Nb or Pt), Mg or Ca, the balance being Fe and inevitable impurities.Type: GrantFiled: February 21, 1995Date of Patent: February 6, 1996Assignee: Hitachi Metals, Ltd.Inventors: Norio Takahashi, Toshio Fujita
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Patent number: 5480608Abstract: A ferritic stainless steel having excellent oxidation resistance, toughness and hot workability contains 0.001-0.20% of at least one of Ca, Mg and Ba as an amount of [Ca]+[Mg]+1/5[Ba], and La: 0.06-0.5% and Ce: 0.002-0.050% in addition to C, Si, Mn, Ni, Cr, Al, Ti and N as a main component provided that these components satisfy relations of the following equations (1)-(3):[S].ltoreq.[Ca]+[Mg]+1/5[Ba] (1)[La]/[Ce].gtoreq.5 (2)Ti.gtoreq.Type: GrantFiled: December 13, 1994Date of Patent: January 2, 1996Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Masaomi Tsuda, Yoshito Fujiwara, Yuji Ikegami, Masao Sato, Hiroyuki Fujii
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Patent number: 5470448Abstract: A high performance ionomer assisted electrolytic cell electrode structure is provided. Such structures operate effectively at catalyst loadings as low as 0.10 mg/cm.sup.2 and demonstrate increased structural integrity without ionomer degradation. The inventive structure comprises a hydrated ion exchange membrane having a first surface and a second surface and at least one catalyst ionomer layer bonded to the first and/or second surface of the membrane that comprises hydrated and swollen ionomer solids bonded to discrete catalyst particles.Type: GrantFiled: January 28, 1994Date of Patent: November 28, 1995Assignee: United Technologies CorporationInventors: Trent M. Molter, Kurt M. Critz
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Patent number: 5426084Abstract: A metallic carrier for an automobile catalyst, comprising a metallic honeycomb and a jacket, characterized in that a foil material constituting the metallic honeycomb is comprised of an Fe-Cr-Al-base alloy and has high-temperature proof stresses of 22 kgf/mm.sup.2 or more and 11 kgf/mm.sup.2 or more respectively at 600.degree. C. and 700.degree. C. with the foil material as annealed at a temperature of the recrystallization temperature of the foil material or above.Type: GrantFiled: November 2, 1993Date of Patent: June 20, 1995Assignee: Nippon Steel CorporationInventors: Masuhiro Fukaya, Keiichi Ohmura, Mikio Yamanaka, Fumio Fudanoki, Hidehiko Sumitomo
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Patent number: 5332544Abstract: A ferric stainless steel consists by weight of less than 0.03% carbon, less than 1% silicon, less than 1% manganese, less than 0.04% phosphorus, less than 0.03% sulphur, from 15% to 25% chromium, less than 0.03% nitrogen, from 3% to 6% aluminum, from 0.1% to 4% molybdenum. A small amount of rare-earth elements and yttrium of from 0.01% to 0.15% are added in the steel.Type: GrantFiled: August 16, 1993Date of Patent: July 26, 1994Assignee: Nisshin Steel Co., Ltd.Inventors: Yoshihiro Uematsu, Katsuhisa Miyakusu, Naoto Hiramatsu
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Patent number: 5286442Abstract: A ferric stainless steel consists by weight of less than 0.03% carbon, less than 1% silicon, less than 1% manganese, less than 0.04% phosphorus, less than 0.03% sulphur, from 15% to 25% chromium, less than 0.03% nitrogen, from 3% to 6% aluminum, from 0.1% to 4% molybdenum. A small amount of rare-earth elements and yttrium of from 0.01% to 0.15% are added in the steel.Type: GrantFiled: March 17, 1992Date of Patent: February 15, 1994Assignee: Nisshin Steel Co., Ltd.Inventors: Yoshihiro Uematsu, Katsuhisa Miyakusu, Naoto Hiramatsu