Cobalt Containing Patents (Class 420/454)
  • Patent number: 10253776
    Abstract: Magnetically coupled pumps use cans which have a side wall arranged in a gap between a driver and a rotor of the pump. With a view to good efficiency of the pump, the gap should be as narrow as possible, which can only be achieved with a side wall of a thin wall thickness. In this case, the can must be of a sufficiently great strength, in particular to withstand the differences in pressure in the pump. At the same time, it must be possible for the can to be shaped into a desired geometry in a simple way and to have a high degree of dimensional stability, even under high pump pressures. It is proposed to make a can (1) with a side wall (3) that consists at least partially of a material with a nickel component, wherein the material is a nickel—chromium alloy comprising at least 50 percent by weight of nickel and 17 to 21 percent by weight of chromium, and to harden the side wall (3) by a heat treatment.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: April 9, 2019
    Assignee: KLAUS UNION GMBH & CO. KG
    Inventor: Thomas Eschner
  • Publication number: 20150037199
    Abstract: An essentially Fe-free alloy consists essentially of, in terms of weight percent: 4 to 11 Co, 6.5 to 7.5 Cr, 0 to 0.15 Al, 0.5 to 0.85 Mn, 11 to 20 Mo, 1 to 3.5 Ta, 0.05 to 9 W, 0.03 to 0.08 C, 0 to 0.001 B, 0.0005 to 0.005 N, balance Ni, the alloy being characterized by, at 850° C., a yield strength of at least 25 Ksi, a tensile strength of at least 45 Ksi, a creep rupture life at 12 Ksi of at least 10 hours, and a corrosion rate, expressed in weight loss [g(cm2sec)]10?11 during a 1000 hour immersion in liquid FLiNaK at 850° C., in the range of 5 to 20.
    Type: Application
    Filed: August 5, 2013
    Publication date: February 5, 2015
    Inventors: David E. Holcomb, Govindarajan Muralidharan, Dane F. Wilson
  • Publication number: 20140356223
    Abstract: The inventors have developed a new alloy which is useful in HVOF-spraying of a substrate, such as plungers which are used in glass manufacture. When coated with said alloy, these parts display high wear resistance and consequently longer lifetime.
    Type: Application
    Filed: December 5, 2012
    Publication date: December 4, 2014
    Inventors: Lars-åke Nilsson, Peter Olsérius
  • Patent number: 8808473
    Abstract: An austenitic heat resistant alloy includes, by mass percent, C: 0.15% or less, Si: 2% or less, Mn: 3% or less, Ni: 40 to 60%, Co: 10.14 to 25%, Cr: 15% or more and less than 28%, either one or both of Mo: 12% or less and W: less than 0.05%, the total content thereof being 0.1 to 12%, Nd: 0.001 to 0.1%, B: 0.0005 to 0.006%, N: 0.03% or less, O: 0.03% or less, at least one selected from Al: 1.36% or less, Ti: 3% or less, and Nb: 3% or less, and the balance being Fe and impurities. The contents of P and S in the impurities are P: 0.03% or less and S: 0.01% or less. The alloy satisfies 1?4×Al+2×Ti+Nb?12 and P+0.2×Cr×B?0.035, where an element in the Formulas represents the content by mass percent.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: August 19, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Hiroyuki Hirata, Hirokazu Okada, Hiroyuki Semba, Kazuhiro Ogawa, Atsuro Iseda, Mitsuru Yoshizawa
  • Patent number: 8785035
    Abstract: A composition for making a contact contains predetermined amounts of cobalt and sulfur and has a predetermined average particle size. The composition for making the contact includes a nickel-cobalt alloy containing 20% by weight to 55% by weight of cobalt, and 0.002 part by weight to 0.02 part by weight of sulfur with respect to 100 parts by weight of the nickel-cobalt alloy, the composition having an average particle size of 0.10 ?m to 0.35 ?m. The contact made with the composition may be included in a connector.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: July 22, 2014
    Assignee: OMRON Corporation
    Inventors: Kuniyoshi Maezawa, Yoko Ishikawa
  • Publication number: 20130302647
    Abstract: A multi component braze filler alloy is described having a melting temperature less than about 1235 deg. C. and greater than about 1150 deg. C. This alloy can be processed by hot isostatic pressing (HIP) at a temperature above about 1065 deg. C. and is particularly suited for the repair of gas turbine blades and vanes, especially those made from alloy 247. The relatively low Ti content in the present braze alloy tends to form less MC carbides at the joint interface, particularly in comparison with other braze alloys high in Zr and/or Hf.
    Type: Application
    Filed: May 9, 2012
    Publication date: November 14, 2013
    Inventors: Kazim Ozbaysal, Sebastian Piegert
  • Patent number: 8313591
    Abstract: An austenitic heat resistant alloy, which contains, by mass percent, C?0.15%, Si?2%, Mn?3%, Ni: 40 to 80%, Cr: 15 to 40%, W and Mo: 1 to 15% in total content, Ti?3%, Al?3%, N?0.03%, O?0.03%, with the balance being Fe and impurities, and among the impurities P?0.04%, S?0.03%, Sn?0.1%, As?0.01%, Zn?0.01%, Pb?0.01% and Sb?0.01%, and satisfies the conditions [P1=S+{(P+Sn)/2}+{(As+Zn+Pb+Sb)/5}?0.050], [0.2?P2=Ti+2Al?7.5?10×P1], [P2?9.0?100×O] and [N?0.002×P2+0.019] can prevent both the liquation crack in the HAZ and the brittle crack in the HAZ and also can prevent defects due to welding fabricability, which occur during welding fabrication, and moreover has excellent creep strength at high temperatures. Therefore, the alloy can be used suitably as a material for constructing high temperature machines and equipment, such as power generating boilers, plants for the chemical industry and so on.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: November 20, 2012
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Hiroyuki Hirata, Atsuro Iseda, Hirokazu Okada, Hiroyuki Semba, Kaori Kawano, Osamu Miyahara
  • Publication number: 20120125979
    Abstract: A method for repairing a component of a gas turbine and a solder alloy are disclosed. In an embodiment, the method includes applying the solder alloy to the component in an area of the component having a punctiform damage or a linear imperfection, where the solder alloy is a mixture of a NiCoCrAlY alloy and a Ni-based solder. A molded repair part made of the solder alloy is applied to the component in an area of the component having a planar defect. The component is heat treated to solder the molded repair part on the component and to solder the solder alloy applied to the component in the area of the component having the punctiform damage or the linear imperfection. The component is cooled after the heat treating and, following the cooling, the component is further heat treated.
    Type: Application
    Filed: August 5, 2010
    Publication date: May 24, 2012
    Applicant: MTU AERO ENGINES GMBH
    Inventors: Bernd Daniels, Michael Hillen
  • Publication number: 20110064569
    Abstract: In one embodiment, a nickel-base alloy for forging or rolling contains, in weight %, carbon (C): 0.05 to 0.2, silicon (Si) 0.01 to 1, manganese (Mn): 0.01 to 1, cobalt (Co): 5 to 20, iron (Fe): 0.01 to 10, chromium (Cr): 15 to 25, and one kind or two kinds or more of molybdenum (Mo), tungsten (W) and rhenium (Re), with Mo+(W+Re)/2: 8 to 25, the balance being nickel (Ni) and unavoidable impurities.
    Type: Application
    Filed: August 11, 2010
    Publication date: March 17, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Masayuki YAMADA, Kiyoshi Imai, Kuniyoshi Nemoto, Shigekazu Miyashita, Takeo Suga
  • Publication number: 20110058977
    Abstract: A Ni based cast alloy consisting essentially of C: 0.01 to 0.2% by weight, Si: 0.5 to 4.0% by weight, Cr: 14 to 22% by weight, Mo+W: 4.0 to 10% by weight, B: 0.001 to 0.02% by weight, Co: up to 10% by weight, Al: up to 0.5% by weight, Ti: up to 0.5% by weight, Nb: up to 5.0% by weight, Fe: up to 10% by weight, the balance being Ni and incidental impurities, wherein a ?? phase precipitates in a matrix phase thereof.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 10, 2011
    Inventors: Jun Sato, Shinya Imano, Hiroyuki Doi
  • Patent number: 7824606
    Abstract: The invention provides nickel-based alloys that are useful in the preparation of articles for applications requiring high mechanical and physical properties, such as high strength and high heat stability, while simultaneously reducing the cost of preparation of the alloys. The invention further provides articles, such as turbine wheels, prepared using the inventive alloys.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: November 2, 2010
    Assignee: Honeywell International Inc.
    Inventor: Mark Heazle
  • Publication number: 20100133096
    Abstract: Use of an austenitic stainless steel wherein the chemical composition comprises 10-20 weight % nickel, 10-20 weight % chromium, 30-50 weight % iron, maximum 17 weight % of another element or elements and the balance iron and/or chromium and/or nickel as construction material in a device or structural components that are exposed to an oxygen and/or a hydrogen and/or a hydrofluoric acid environment.
    Type: Application
    Filed: June 27, 2007
    Publication date: June 3, 2010
    Applicant: HYDROGEN TECHNOLOGIES AS
    Inventors: Rolf Steen Hansen, Sten Egil Johnsen, Hans Jörg Fell, Egil Rasten
  • Patent number: 7662740
    Abstract: A fuel cell catalyst comprising platinum, chromium, and copper, nickel or a combination thereof. In one or more embodiments, the concentration of platinum is less than 50 atomic percent, and/or the concentration of chromium is less than 30 atomic percent, and/or the concentration of copper, nickel, or a combination thereof is at least 35 atomic percent.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: February 16, 2010
    Assignees: Symyx Technologies, Inc., Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Konstantinos Chondroudis, Alexander Gorer, Martin Devenney, Ting He, Hiroyuki Oyanagi, Daniel M. Giaquinta, Kenta Urata, Hiroichi Fukuda, Qun Fan, Peter Strasser, Keith James Cendak, Jennifer N. Cendak, legal representative
  • Patent number: 6936116
    Abstract: A nickel-based alloy for producing, by casting, components which have solidified in single crystal form, contains rhenium and tungsten, as well as aluminium, chromium and cobalt. The rhenium content is at least 2.3% by weight, and the weight ratio of the tungsten content to the rhenium content is at least 1.1 to at most 1.6.
    Type: Grant
    Filed: January 10, 2002
    Date of Patent: August 30, 2005
    Assignee: MTU Aero Engines GmbH
    Inventors: Uwe Glatzel, Thomas Mack, Silke Woellmer, Jürgen Wortmann
  • Patent number: 6818077
    Abstract: 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: Grant
    Filed: May 6, 2003
    Date of Patent: November 16, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Akira Yoshinari, Hideki Tamaki, Hiroyuki Doi
  • Patent number: 6764646
    Abstract: A nickel-chromium-molybdenum-copper alloy that is resistant to sulfuric acid and wet process phosphoric acid contains in weight percent 30.0 to 35.0% chromium, 5.0 to 7.6% molybdenum, 1.6 to 2.9% copper, up to 1.0% manganese, up to 0.4% aluminum, up to 0.6% silicon, up to 0.06% carbon, up to 0.13% nitrogen, up to 5.1% iron, up to 5.0% cobalt, with the balance nickel plus impurities.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: July 20, 2004
    Assignee: Haynes International, Inc.
    Inventors: Paul Crook, Martin L. Caruso
  • Patent number: 6752883
    Abstract: 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: Grant
    Filed: May 31, 2002
    Date of Patent: June 22, 2004
    Assignees: Dokuritsu Gyousei Houjin Sangyo Gijutsu Sougo Kenkyusho, Daido Tokushuko Kabushiki Kaisha, Tohoku Tokushuko Kabushiki Kaisha
    Inventors: Kiyohito Ishida, Katsunari Oikawa, Shigeki Ueta, Toshiharu Noda, Takashi Ebata
  • Patent number: 6740292
    Abstract: The invention relates to a nickel-base superalloy. The alloy according to the invention is characterized by the following chemical composition (details in % by weight): 7.7-8.3 Cr, 5.0-5.25 Co, 2.0-2.1 Mo, 7.8-8.3 W, 5.8-6.1 Ta, 4.9-5.1 Al, 1.3-1.4 Ti, 0.11-0.15 Si, 0.11-0.15 Hf, 200-750, preferably 200-300 ppm of C, 50-400, preferably 50-100 ppm of B, remainder Ni and production-related impurities. It is distinguished by very good castability and a high resistance to oxidation.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: May 25, 2004
    Assignee: Alstom Technology Ltd
    Inventors: Douglas Arrell, Mohamed Nazmy
  • Patent number: 6696176
    Abstract: 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: Grant
    Filed: March 6, 2002
    Date of Patent: February 24, 2004
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: David B. Allen, Gregg P. Wagner, Brij B. Seth
  • Publication number: 20030070733
    Abstract: A single step heat treatment for Ni—Cr—Mo alloys containing from 12% to 19% chromium and from 18% to 23% molybdenum provides higher yield strength, high tensile strength and other mechanical properties comparable to those observed in similar alloys age-hardened according to current practices. This treatment is done over a total time of at least 24 hours and preferably less than 50 hours. However, the treatment works for only those alloys having alloying elements present in amounts according to an equation here disclosed.
    Type: Application
    Filed: June 28, 2001
    Publication date: April 17, 2003
    Inventors: Lee M. Pike, Dwaine L. Klarstrom
  • Publication number: 20030049155
    Abstract: A two step heat treatment for Ni—Cr—Mo alloys containing from 12% to 23.5% chromium provides higher yield strength, high tensile strength and other mechanical properties comparable to those observed in similar alloys age-hardened according to current practices. This treatment is done over a total time of not more than 50 hours. However, the treatment works for only those alloys having alloying elements present in amounts according to an equation here disclosed.
    Type: Application
    Filed: June 28, 2001
    Publication date: March 13, 2003
    Inventors: Lee M. Pike, Dwaine L. Klarstrom, Michael F. Rothman
  • Patent number: 6303015
    Abstract: Metallic glass/amorphous metal electrodes produced by rapid solidification (i) having a structure that is either amorphous or nanocrystalline, (ii) containing tile principal alloying element as Ni, (iii) containing alloying additions of Co and at least one member of group IVB, VB, VIB VIIB and/or VIIIB, preferably Cr and V, in the range of 0 to 20 at. %, and when combined with Ni, represent 0.75 to 0.85 of the atomic fraction of the alloy, and (iv) containing metalloid elements comprised preferably of one or more of the elements C, B, Si and P either singly or in combination to represent 0.15 to 0.25 atomic faction of the alloy. The electrodes have excellent thermal stability, improved stability in an aqueous electrolyte and can provide improved current efficiency—anodic overpotential performance. They are used in the electrolysis of aqueous electrolyte solutions such as mixtures of caustic and water in the production of oxygen and hydrogen.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: October 16, 2001
    Inventors: Steven J. Thorpe, Donald W. Kirk
  • Patent number: 6284392
    Abstract: 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: Grant
    Filed: August 11, 1999
    Date of Patent: September 4, 2001
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Brij B. Seth, Easo P. George, Sudarsanum S. Babu, Gene M. Goodwin, Stanislaus A. David, Carol E. Moyer
  • Patent number: 6280540
    Abstract: The C-type nickel base alloys of the type containing significant amounts of chromium (about 16 to 25%) and molybdenum (about 12 to 18%) may be improved by adding small but critical amounts of copper (about 1 to 3.5%) which their general corrosion resistance to a wide range of both oxidizing and non-oxidizing industrial media.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: August 28, 2001
    Assignee: Haynes International, Inc.
    Inventor: Paul Crook
  • Patent number: 6242113
    Abstract: 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: Grant
    Filed: June 10, 1999
    Date of Patent: June 5, 2001
    Assignee: Inco Alloys International, Inc.
    Inventor: Samuel D. Kiser
  • Patent number: 6207291
    Abstract: There is disclosed a high temperature sliding alloy consisting of, by weight, 2 to 8% Cr, 2 to 10% Fe, 0.1 to 1.5% Si, 2 to 22% Co, 1.4 to 11% Mo, and the balance Ni, wherein 1 to 35% by weight of Co—Mo—Cr—Si base hard particles are dispersed in a matrix of the sliding alloy, and each of the hard particles has an oxide phase formed on a surface thereof. With this construction, the sliding alloy exhibits excellent sliding properties and particularly a low friction coefficient and excellent wear resistance in the temperature range of from a room temperature to 900° C.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: March 27, 2001
    Assignee: Daido Metal Company Ltd.
    Inventors: Kouki Ozaki, Hideyumi Matsumura, Takayuki Shibayama
  • Patent number: 5882440
    Abstract: A heat-resistant alloy comprising, as expressed in % by weight, 0.03 to 0.1% of C, 0.2 to 0.7% of Si, 0.2 to 0.7% of Mn, 42 to 60% of Ni, 25 to 35%0 of Cr, 8 to 20% of W, over 0% to not more than 8% Mo, over 0% to not more than 5% of Co, and the balance substantially Fe. The alloy has improved resistance to compressive deformation and oxidation resistance for use in oxidizing atmospheres having a high temperature of 1250.degree. C.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: March 16, 1999
    Assignee: Kubota Corporation
    Inventors: Akira Shinosaki, Toru Kawai, Yoshihide Shida
  • Patent number: 5783145
    Abstract: An iron-nickel alloy, the chemical composition of which includes by weight:30%.ltoreq.Ni+Co.ltoreq.85%;0%.ltoreq.Co+Cu+Mn.ltoreq.10%;0%.ltoreq.Mo+W+Cr.ltoreq.4%;0%.ltoreq.V+Si.ltoreq.2%;0%.ltoreq.Nb+Ta.ltoreq.1%;0.003%.ltoreq.C.ltoreq.0.05% 0.003%.ltoreq.Ti.ltoreq.0.15%;0.003%.ltoreq.Ti+Zr+Hf.ltoreq.0.15%;0.001%<S+Se+Te<0.015%;and the remainder, iron and impurities resulting from production; in addition, the chemical composition satisfies the relationship:0.ltoreq.Nb+Ta+Ti+Al.ltoreq.1%.A cold-rolled strip with a cubic texture and its uses.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: July 21, 1998
    Assignee: Imphy S.A.
    Inventors: Lucien Coutu, Pierre Louis Reydet
  • Patent number: 5529642
    Abstract: 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: Grant
    Filed: September 19, 1994
    Date of Patent: June 25, 1996
    Assignee: Mitsubishi Materials Corporation
    Inventors: Katsuo Sugahara, Hideo Kitamura, Saburo Wakita, Koji Toyokura, Yoshio Takizawa, Tsutomu Takahashi
  • Patent number: 5516485
    Abstract: Air meltable, weldable cast alloys of high hot strength and hot gas corrosion resistance especially in the service temperature range of about 1800.degree. F. to 2100.degree. F. which consist essentially of:______________________________________ Nickel 41-54% by weight Chromium 24-29% Iron 8-18% Cobalt 3-8% Tungsten 4.5-6.5% Molybdenum 4-6.5% Niobium 0.8-2% Manganese 0.1-1.5% Silicon 0.1-1.5% Carbon 0.2-0.4% ______________________________________provided, that the nickel plus cobalt content is at least about 45%.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: May 14, 1996
    Assignee: Carondelet Foundry Company
    Inventor: John H. Culling
  • Patent number: 5194222
    Abstract: An alloy exhibiting corrosion resistance in a combustion environment where V, Na, S and Cl are present comprises, in weight percent, not more than 0.05% C, 0.02-0.5% Si, 0.02-0.5% Mn, 15-35% Cr, 0.5-4% Mo, 10-40% Co, 5-15% Fe, 0.5-5% W, 0.0003-0.005% Ca and the remainder of Ni at a content of not less than 4% and unavoidable impurities, provided that Cr (%)+0.5Ni (%)+3Mo (%).gtoreq.30 (%) and Ni (%)+0.5Co (%).gtoreq.Cr (%)+Mo (%)+W (%). A composite steel tube exhibiting corrosion resistance in a combustion environment where V, Na, S and Cl are present comprises an inner tube constituted of Cr-containing boiler tube and an outer tube constituted of the alloy.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: March 16, 1993
    Assignee: Nippon Steel Corporation
    Inventors: Hiroyuki Ogawa, Tetsuo Ishitsuka, Kozo Denpo, Akihiro Miyasaka, Michihisa Ito, Mizuo Sakakibara
  • Patent number: 5077006
    Abstract: This invention relates to heat and corrosion resistant alloys for structural parts in industrial furnaces and similar installations requiring hot strength, long life and resistance to hot gas corrosion, carburization and thermal fatigue, and to master alloys to aid in the production of these alloys. The alloys consist of additions of less than one percent by weight each of the components tungsten, zirconium, molybdenum, columbium, titanium and one or more rare earth elements to base alloys of the types standardized by the Alloy Castings Institute Division of the Steel Founders Society of America or to similar base alloys. The master alloys consist of all of these components, with the possible exception of Mo, combined together in the desired proportions, possibly along with some combination of iron, nickel or chromium in total content of up to about half of the master alloys by weight as partial diluents. The resultant master alloys are always denser than molten baths of the base heat resistant alloys.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: December 31, 1991
    Assignee: Carondelet Foundry Company
    Inventor: John H. Culling
  • Patent number: 5063023
    Abstract: Disclosed is a nickel-base alloy for use under "super oxidizing" environments, for example, concentrated sulfuric acid, fuming nitric acid, chromium acid and mixtures containing chromic acid. The alloy has good strength and may be precipitation hardened. Its thermal stability and weldability are excellent. The alloy has a high degree of resistance to pitting. A nominal composition contains, in percent by weight, about 20 chromium, about 2 copper, about 2 iron, about 2 molybdenum, about 5 silicon and the balance nickel plus normal impurities.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: November 5, 1991
    Assignee: Haynes International, Inc.
    Inventor: Narasi Sridhar
  • Patent number: 5019459
    Abstract: A high temperture, bimetallic cylinder of either ASTM 193B-16 carbon steel or duplex stainless steel having a wear and corrosion resistant inlay or liner of a nickel-based alloy containing 1.5 to 4.5% carbon, 1.5 to 3.5% silicon, 1.0 to 3.0% boron, up to 7.0% chromium, up to 15% iron, 1.0 to 6.0% cobalt and 30 to 60% tungsten. The inlay is centrifugally cast within the cylinder which is thermally compatible with the inlay such that it retains a high yield strength after casting.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: May 28, 1991
    Assignee: Xaloy Incorporated
    Inventors: Schiao F. Chou, Willie Roberson
  • Patent number: 4997623
    Abstract: A heat-deformable, austenitic nickel-chromium-iron alloy with high oxidation resistance and thermal strength, comprises17 up to 25 % Fe14 up to 20 % Cr0.5 up to 2.0 % Si0.1 up to 2.0 % Mn0.04 up to 0.10 % C0.02 up to 0.10 % Ca0.010 up to 0.080 % N0.025 up to 0.045 % Ti0.04 up to 0.17 % Zr0.03 up to 0.08 % Yless than 0.010 % Sless than 0.015 % Peach less than 0.1 % Mo, W, Coeach less than 0.05 % Nb, Ta, Al, V, Curest Niwith the feature, that the nitrogen content is adjusted in accordance with the following formula:% N=(0.15 up to 0.30).times.% Zr+(0.30 up to 0.60).times.% Ti.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: March 5, 1991
    Assignee: VDM Nickel-Technologie AG
    Inventor: Ulrich Brill
  • Patent number: 4889696
    Abstract: Disclosed herein is an improved chemical reactor apparatus of the type suitable for supporting a catalyst during the high temperature oxidation of ammonia to form nitric acid which is fabricated from a superior nickel base superalloy containing about: 20 to 24% chromium, 10 to 20% tungsten, 1.0 to 3.5% molybdenum, 0.3 to 1% manganese, 0.2 to 0.75% silicon, 10 to 20% cobalt and in which certain relationhips among these alloying elements provide a structure which has very high creep strength and resistance to the corrosive environment.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: December 26, 1989
    Assignee: Haynes International, Inc.
    Inventor: Dwaine L. Klarstrom
  • Patent number: 4874577
    Abstract: Disclosed is a wear-resistant intermetallic compound alloy having superior machineability which consists essentially of: 45-60% of either Ni or Co or both with cobalt content of at least 5%, at least one of 0.1-2% of Hf and 0.05-2% of Re, 0-2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb and Bi, 0-2% of C, and 0-5% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn, the balance being Ti and incidental impurities, the percent being atomic percent.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: October 17, 1989
    Assignee: Mitsubishi Kinzoku Kabushiki Kaisha
    Inventors: Saburo Wakita, Junji Hoshi
  • Patent number: 4853183
    Abstract: A highly corrosion resistant, durable, strong, hardenable and relatively inexpensive nickel based alloy containing chromium and a high iron content has improved castability and weldability. The alloy contains approximately the quantities indicated: nickel 33 to 53 (to balance to 100 percent), chromium 20 to 25 percent, molybdenum 6 to 9 percent, cobalt 4 to 8 percent, iron 15 to 20 percent, manganese 2 to 4 percent, copper less then about 0.15 percent, carbon up to 0.2 percent and silicon 0.5 to 1.0 percent. The alloy is air meltable and produces a highly fluid castable melt. All percentages are by weight.
    Type: Grant
    Filed: August 28, 1987
    Date of Patent: August 1, 1989
    Assignee: Chas s. Lewis & Co., Inc.
    Inventors: Thomas E. Johnson, John K. McBroom, Jr.
  • Patent number: 4765956
    Abstract: Nickel-chromium alloys consisting essentially of from 30-75 nickel, 12-30% chromium, up to 10% molybdenum, up to 8% tungsten, up to 15% cobalt, up to 5% of niobium and/or tantalum, titanium plus aluminum up to 5%, and carbon nitrogen and silicon in correlated percentages to thereby improve low cycle and thermal fatigue strength, the balance being from 0 to 50% iron.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: August 23, 1988
    Assignee: Inco Alloys International, Inc.
    Inventors: Gaylord D. Smith, Jack M. Wheeler, Stephen C. Tassen
  • Patent number: 4762682
    Abstract: Disclosed herein is an improved chemical reactor apparatus of the type suitable for supporting a catalyst during the high temperature oxidation of ammonia to form nitric acid which is fabricated from a superior nickel base superalloy containing about: 20 to 24% chromium, 10 to 20% tungsten, 1.0 to 3.5% molybdenum, 0.3 to 1% manganese, 0.2 to 0.75% silicon, and up to 20% cobalt and in which certain relationships among these alloying elements provide a structure which has very high creep strength and resistance to the corrosive environment.
    Type: Grant
    Filed: August 21, 1986
    Date of Patent: August 9, 1988
    Assignee: Haynes International, Inc.
    Inventor: Dwaine L. Klarstrom
  • Patent number: 4692305
    Abstract: 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: Grant
    Filed: November 5, 1985
    Date of Patent: September 8, 1987
    Assignee: Perkin-Elmer Corporation
    Inventors: Subramaniam Rangaswamy, John H. Harrington
  • Patent number: 4689279
    Abstract: A solid solution, nonmagnetic, austenitic nickel base alloy class is described. It contains: about 12 to 21 weight percent chromium; a concentration of molybdenum and/or tungsten, such that the sum of the weight percent molybdenum and one third the weight percent tungsten present is between 1 and 7 weight percent and wherein the w % tungsten is less than 12 w %; about 4 to 13 w % iron; small but effective amounts of the desulfurizing agent, manganese; and up to about 2.5 w % silicon. Carbon may be present at levels up to 0.15 w % and cobalt may be present at levels up to 2 w %. The above elements are balanced to provide alloys having a mean thermal expansion coefficient, .alpha..sub.(RT-T), for T.ltoreq.1000.degree. F., of less than 8.3.times.10.sup.-6 in./in./.degree.F., and preferably less than 8.times.10.sup.-6 in./in./.degree.F.In addition, a precipitation hardening, non-magnetic, austenitic nickel base alloy class is also described.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: August 25, 1987
    Assignee: Westinghouse Electric Corp.
    Inventors: Frederick C. Hull, Sun-Keun Hwang
  • Patent number: 4673123
    Abstract: A filler for welding a heat-resistant nickel-base alloy is disclosed. The filler comprises heat-resistant nickel-base alloy and an additive of 0.003 to 0.015 wt % boron based on the total weight of the filler metal. The filler may further comprise an other additive such as zirconium in the total amount of those two elements of 0.015 to 0.15 wt %, and the filler may further comprise the other additives such as lanthanum and cellium in the total amount of those fine elements of 0.018 to 0.15 wt % based on the total weight of the filler. The disclosed filler has improved creep properties at high temperatures and can be obtained without the defects inherent to conventional filler of heat-resistant nickel-base alloys.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: June 16, 1987
    Assignees: Nippon Welding Rod Co., Ltd., Fuji Electric Company Ltd., Fuji Electric Corporate Research
    Inventors: Shigeo Shin, Tamao Takatsu, Teiichiro Saito, Akiyoshi Kikuchi, Tsuneo Nakanishi
  • Patent number: 4514360
    Abstract: Single crystal nickel base superalloys of the gamma-gamma prime type are strengthened by deforming them 2-14% at temperatures in the range 700.degree.-1100.degree. C. Yield strength will be increased typically by 25-50%, depending on the crystallographic orientation. Careful control of parameters is necessary to obtain the strengthening while avoiding recrystallization. The metal is first homogenized and provided with a fine gamma prime deformation; strain rates in the range of 10.sup.-1 cm/cm/sec or less are used.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: April 30, 1985
    Assignee: United Technologies Corporation
    Inventors: Anthony F. Giamei, Bernard H. Kear
  • Patent number: 4439236
    Abstract: Boron-containing transition metal alloys based on one or more of iron, cobalt and nickel, and containing at least two metal components, are characterized by being composed of ultrafine grains of a primary solid-solution phase randomly interspersed with particles of complex borides which are predominantly located at the junctions of at least three grains of the primary solid-solution phase. These alloys are obtained by devitrification of the solid, amorphous state under specific heat-treatment conditions. These alloys can be consolidated into three-dimensional bodies.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: March 27, 1984
    Assignee: Allied Corporation
    Inventor: Ranjan Ray
  • Patent number: 4425300
    Abstract: Hard facing nickel-base alloy comprising 10 to 25% by weight of chromium, 3 to 15% by weight of molybdenum, 3 to 7% by weight of silicon, 1 to 2.5% by weight of carbon and 1 to 30% by weight of iron, the balance being substantially nickel. The alloy may also contain up to 0.4% by weight of boron, up to 15% by weight of cobalt, up to 4% by weight of tungsten, up to 3% by weight of tantalum or up to 2% by weight of tin, or two or more of these elements, if necessary. No porosity is likely to be produced in the hard facing layer of the alloy formed on a relatively small piece of base metal.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: January 10, 1984
    Assignee: Fukuda Metal Foil & Powder Co., Ltd.
    Inventors: Takao Teramoto, Kensuke Hidaka
  • Patent number: 4415530
    Abstract: A welding alloy particularly directed to use as a wrought filler metal and contains selected percentages of chromium, molybdenum, manganese, columbium, magnesium, a number of trace elements and the balance essentially nickel.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: November 15, 1983
    Assignee: Huntington Alloys, Inc.
    Inventor: James P. Hunt
  • Patent number: 4410490
    Abstract: 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: Grant
    Filed: July 12, 1982
    Date of Patent: October 18, 1983
    Assignee: Marko Materials, Inc.
    Inventors: Ranjan Ray, Viswanathan Panchanathan
  • Patent number: 4400210
    Abstract: An alloy useful for manufacturing high strength deep well casing, tubing and drill pipes for use in oil-well operations is disclosed. The alloy exhibits improved resistance to stress corrosion cracking in the H.sub.2 S--CO.sub.2 --Cl.sup.- -environment, which comprises the following alloy composition:______________________________________ C: .ltoreq.0.1% Si: .ltoreq.1.0% Mn: .ltoreq.2.0% P: .ltoreq.0.030% S: .ltoreq.0.005% N: 0-0.30% Ni: 25-60% Cr: 22.5-35% Mo: 0-7.5% (excl.) W: 0-15% (excl.) Cr (%) + 10Mo (%) + 5W (%) .gtoreq. 70% 3.5% .ltoreq. Mo (%) + 1/2W (%) < 7.5% Cu: 0-2.0% Co: 0-2.0% Rare earths: 0-0.10% Y: 0-0.20% Mg: 0-0.10% Ca: 0-0.10% ______________________________________one or more of Nb, Ti, Ta, Zr and V in the total amount of 0.5-4.0%, if necessary,Fe and incidental impurities: balance.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: August 23, 1983
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Takeo Kudo, Yasutaka Okada, Taishi Moroishi, Akio Ikeda, Hiroo Ohtani, Kunihiko Yoshikawa
  • Patent number: 4400349
    Abstract: An alloy useful for manufacturing high strength oil-well casing, tubing and drill pipes for use in oil-well operations is disclosed. The alloy exhibits improved resistance to stress corrosion cracking in the H.sub.2 S--CO.sub.2 --Cl.sup.- environment, which comprises the following alloy composition:______________________________________ C: .ltoreq. 0.1% Si: .ltoreq. 1.0% Mn: 3-20% P: .ltoreq. 0.030% S: .ltoreq. 0.005% N: 0-0.30% sol. Al .ltoreq. 0.5% Ni: 20-60% Cr: 15-35% Mo: 0-12% W: 0-24% Cr(%) + 10 Mo(%) + 5 W(%) .gtoreq. 50% 1/2 Mn(%) + Ni(%) .gtoreq. 25% 1.5% .ltoreq. Mo(%) + 1/2 W(%) .ltoreq. 12% Cu: 0-2.0% Co: 0-2.0% Rare Earths: 0-0.10% Y: 0-0.20% Mg: 0-0.10% Ti: 0-0.5% Ca: 0-0.10% Fe and incidental impurities: balance.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: August 23, 1983
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Takeo Kudo, Yasutaka Okada, Taishi Moroishi, Akio Ikeda, Hiroo Ohtani, Kunihiko Yoshikawa