Fe, Containing 0.01-1.7% Carbon (i.e., Steel) Patents (Class 428/638)
  • Patent number: 10894388
    Abstract: There is disclosed in the disclosure a protective steel plate with excellent cold roll formability, comprising: three soft steel layers (1, 4, 5) and two hard steel layers (2, 3), wherein the three soft steel layers (1, 4, 5) and the two hard steel layers (2, 3) are positioned alternately, and face layers of the protective steel plate are soft steel layers (1, 4, 5), wherein the hard steel layers (2, 3) and the soft steel layers (1, 4, 5) are atomically bonded by rolling cladding; wherein the soft steel layers (1, 4, 5) comprise chemical elements in percentage by mass of: C: 0.001-0.01%, 0<Si?0.005%, Mn: 0.05-0.15%, 0<Al?0.005%, Ti: 0.01-0.10%, with a balance of Fe and other unavoidable impurities.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: January 19, 2021
    Assignee: Baoshan Iron & Steel Co., Ltd.
    Inventors: Fengming Song, Xiaoping Hu, Donghui Wen
  • Patent number: 9902133
    Abstract: A multilayer flat steel product may include a multitude of mutually bonded steel alloy layers. A steel of a first steel alloy may be provided in at least one of the steel alloy layers, and a steel of a second steel alloy different than the first steel alloy may be provided in at least one of the other steel alloy layers. The steel of the first steel alloy may have high strength, and the steel of the second steel alloy may have lower strength and lower carbon content. To enable function-optimized modelling of local material properties in all directions, at least one steel of the first steel alloy and at least one steel of the second steel alloy may be present at least within one layer of the flat steel product. Further, a component, such as for a motor vehicle body, may be comprised of a corresponding flat steel product.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: February 27, 2018
    Assignee: THYSSENKRUPP STEEL EUROPE AG
    Inventors: Jens Ulrik Becker, Stefan Myslowicki
  • Patent number: 9322075
    Abstract: Provided is an ultra-fine grained, high-strength, high-toughness carbon steel wire rod manufactured through control of a microstructure by process control without addition of relatively expensive alloying elements. More particularly, the material provided is an ultra-fine grained, high-strength, high-toughness carbon steel wire rod having a microstructure including a ferrite structure having an area fraction of 60% or more and a cementite structure as a remainder, wherein an average grain diameter of ferrite grains is 15 ?m or less. Also provided is a method of manufacturing the wire rod.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: April 26, 2016
    Assignee: POSCO
    Inventors: Dong-Hyun Kim, Woo-Gi Shin, You-Hwan Lee
  • Publication number: 20140248508
    Abstract: Extending portions of a front sub-frame are each formed by stacking two thin plates made of steel, and flange portions of the front sub-frame and flange portions of a rear sub-frame made of aluminum are superimposed on each other, and are friction stir welded, with a seal material applied to the superimposed surfaces. Of the two thin plates, the thin plate joined to the rear sub-frame made of aluminum has, at each end thereof, a bent portion and an extending part. The bent portion is formed by bending. The end of the extending part extends outward farther than the rear sub-frame. The extending part is covered by the seal material. The bent portion is disposed at a farther end of the extending part.
    Type: Application
    Filed: September 3, 2013
    Publication date: September 4, 2014
    Applicant: HONDA MOTOR CO., LTD
    Inventors: Shosuke Ohhama, Tetsuya Miyahara
  • Patent number: 8752752
    Abstract: A composite steel plate includes at least two steel sheets rolled to form a plate. One of the sheets has a composition that varies in a depthwise direction, between nanocrystalline and micron grained. The plate is made by treating a steel sheet to produce a composition in the sheet that varies in a depthwise direction of the sheet between nanocrystalline and micron grained, stacking the treated sheet with at least one other steel sheet, and rolling the stacked sheets to form the plate.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: June 17, 2014
    Assignee: Hong Kong Polytechnic University
    Inventors: Jian Lu, Junbao Zhang, Aiying Chen
  • Publication number: 20130189539
    Abstract: A three-layer steel strip composite of a steel strip having a first microstructure disposed between two steel strips having a second microstructure wherein a metallic coating is present on each steel strip having the second microstructure on a surface opposite the surface contacting the steel strip having the first microstructure and method of making same.
    Type: Application
    Filed: October 11, 2011
    Publication date: July 25, 2013
    Applicant: TATA STEEL IJMUIDEN B.V.
    Inventors: Jörgen Van De Langkruis, Christiaan Theodorus Wilhelmus Lahaye
  • Publication number: 20130157077
    Abstract: A novel material used for a bearing ring and a production process thereof is directed to a bimetallic composite pipe and a production process thereof. The aim of the disclosure is to provide a novel material used for a bearing ring and a production process thereof, in which high hardness, high wear resistance and high toughness, high impact toughness are interacted. The novel material used for a bearing ring according to the invention is composed of an annual clad layer and a base layer. The clad layer and the base layer is metallurgy bonded together in radial direction of a ring. The clad layer is made of bearing steel material, and the base layer is made of the material selected from bearing steel, straight carbon steel, high strength low/medium alloy steel or stainless steel.
    Type: Application
    Filed: July 29, 2011
    Publication date: June 20, 2013
    Inventors: Lihui Wang, Chibo Li, Shanqin Bao, Jie Gao, Yong Tang, Yafeng Song, Xiaobin Huang
  • Publication number: 20130130058
    Abstract: To provide an austenitic stainless steel which has an excellent high-temperature corrosion thermal fatigue cracking resistance. An austenitic stainless steel containing, by mass %, Cr: 15.0 to 23.0%, and Ni: 6.0 to 20.0%, wherein a near-surface portion is covered with a worked layer with high energy density having an average thickness of 5 to 30 ?m.
    Type: Application
    Filed: March 26, 2012
    Publication date: May 23, 2013
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Atsuro ISEDA, Yoshitaka Nishiyama, Masahiro Seto, Satomi Yamamoto, Hiroyuki Hirata, Yasutaka Noguchi, Mitsuru Yoshizawa, Hiroshi Matsuo
  • Publication number: 20130094900
    Abstract: Disclosed is a hardfacing alloy deriving its usefulness from carbides and borides of molybdenum and niobium. The alloy does not rely on chromium as an alloying agent. The hardfacing alloy is capable of being applied to a number of industrial substrates in a crack-free manner, and once applied convert the substrate to a wear- and abrasion-resistant material having an extended service life, even when subjected to harsh wear conditions.
    Type: Application
    Filed: October 17, 2011
    Publication date: April 18, 2013
    Applicant: DEVASCO INTERNATIONAL INC.
    Inventors: Grant R. FOLKMANN, Keith E. MOLINE
  • Publication number: 20130065079
    Abstract: A steel rail includes: by mass %, higher than 0.85% to 1.20% of C; 0.05% to 2.00% of Si; 0.05% to 0.50% of Mn; 0.05% to 0.60% of Cr; P?0.0150%; and the balance consisting of Fe and inevitable impurities, wherein 97% or more of a head surface portion which is in a range from a surface of a head corner portion and a head top portion as a starting point to a depth of 10 mm has a pearlite structure, a Vickers hardness of the pearlite structure is Hv320 to 500, and a CMn/FMn value which is a value obtained by dividing CMn [at. %] that is a Mn concentration of a cementite phase in the pearlite structure by FMn [at. %] that is a Mn concentration of a ferrite phase is equal to or higher than 1.0 and equal to or less than 5.0.
    Type: Application
    Filed: June 7, 2011
    Publication date: March 14, 2013
    Inventors: Masaharu Ueda, jun Takahashi, Akira Kobayashi, Takuya Tanahashi
  • Publication number: 20120070686
    Abstract: A method of welding including forming a filler material of a first oxide dispersoid metal, the first oxide dispersoid material having first strengthening particles that compensate for decreases in weld strength of friction stir welded oxide dispersoid metals; positioning the filler material between a first metal structure and a second metal structure each being comprised of at least a second oxide dispersoid metal; and friction welding the filler material, the first metal structure and the second metal structure to provide a weld.
    Type: Application
    Filed: September 21, 2010
    Publication date: March 22, 2012
    Applicant: UT-BATTELLE, LLC
    Inventor: Weiju Ren
  • Patent number: 8110292
    Abstract: The present invention provides high strength steel plate with excellent low temperature toughness, high strength steel pipe using this as a base metal, and methods of production of the same. The steel plate of the present invention contains Mo: 0.05 to 1.00% and B: 0.0003 to 0.0100%, has a Ceq of 0.30 to 0.53, has a Pcm of 0.10 to 0.20, and has a metal structure which has an area percentage of polygonal ferrite of 20 to 90% and has a balance of a hard phase comprised of one or both of bainite and martensite. To obtain this steel plate, strain-introducing rolling is performed with a start temperature of not more than Ar3+60° C., an end temperature of Ar3 or more, and a reduction ratio of 1.5 or more, then the plate is air-cooled and then acceleratedly cooled from Ar3?100° C. to Ar3?10° C. in temperature by 10° C./s or more.
    Type: Grant
    Filed: April 4, 2009
    Date of Patent: February 7, 2012
    Assignee: Nippon Steel Corporation
    Inventors: Taishi Fujishiro, Shinya Sakamoto, Takuya Hara, Hitoshi Asahi
  • Patent number: 8084144
    Abstract: The present invention provides high strength thick welded steel pipe for line pipe superior in low temperature toughness, and a method of production of the same. A base material steel plate containing C: 0.010 to 0.050%, Si: 0.01 to 0.50%, Mn: 0.50 to 2.00%, Al: 0.020% or less, Ti: 0.003 to 0.030%, and Mo: 0.10 to 1.50%, having a carbon equivalent Ceq of 0.30 to 0.53, having a crack susceptability parameter Pcm of 0.10 to 0.20, satisfying formula 3, comprised an area ratio of 20% or less of polygonal ferrite and an area ratio of 80% or more of bainite, and having an effective crystal grain size of 20 ?m or less is formed into a pipe shape, then seam welded to make the effective crystal grain size of the heat affected zone 150 ?m or less: 10C+100Al+5Mo+5Ni<3.3??formula 3.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: December 27, 2011
    Assignee: Nippon Steel Corporation
    Inventors: Takuya Hara, Hitoshi Asahi
  • Patent number: 8039118
    Abstract: The present invention provides high strength welded steel pipe for line pipe inexpensive in cost and superior in low temperature toughness, and a method of production of the same, produced by forming a base material steel plate containing, by mass %, C: 0.010 to 0.050%, Si: 0.01 to 0.50%, Mn: 0.50 to 2.00%, S: 0.0001 to 0.0050%, and Ti: 0.003 to 0.030%, limiting Al to 0.020% or less and Mo to less than 0.10%, having a carbon equivalent Ceq of 0.30 to 0.53 and a crack susceptibility parameter Pcm of 0.10 to 0.20, comprised of polygonal ferrite and residual bainite of an area rate of 20% or less, and having an effective crystal grain size of 20 ?m or less, into a pipe shape, then seam welding it and making the effective crystal grain size of the heat affected zone 150 ?m or less.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: October 18, 2011
    Assignee: Nippon Steel Corporation
    Inventors: Takuya Hara, Hitoshi Asahi
  • Publication number: 20110158572
    Abstract: The invention concerns a method for manufacturing a steel component (6, 11) comprising a first steel part (7) and a second steel part (8), the first (7) and second (8) steel part having a carbon content up to 1.5 weight percent, The method is comprising: Heating (1), at least partly, the first steel part (7), and at least partly, the second steel part (8), to above the alpha/gamma transformation temperature, and joining (2) the first steel part (7) and the second steel part (8) by welding, the welding taking place at a temperature above the alpha/gamma transformation temperature, and cooling (3) such that hardening effects are avoided. The invention further concerns weld seams (9), welded steel components (6, 11), and bearing components (11, 15, 20, 22, 26, 27, 31).
    Type: Application
    Filed: July 10, 2009
    Publication date: June 30, 2011
    Inventors: Patrik Dahlman, John Van De Sanden
  • Publication number: 20100323216
    Abstract: A multilayered composite part includes a plurality of steel alloy layers connected to one another, with at least one core layer consisting of a soft, well deformable steel alloy and at least one steel alloy layer of a very high strength steel alloy, arranged on the core layer. A multilayered composite part which is characterized simultaneously by a high strength paired with very good outer skin quality and very good paint adherence, is achieved in that at least one outer steel alloy layer of a soft, well deformable steel alloy is provided on the very high strength steel alloy layer.
    Type: Application
    Filed: April 25, 2008
    Publication date: December 23, 2010
    Applicant: ThyssenKrupp Steel Europe AG
    Inventors: Jens-Ulrik Becker, Peter Seyfried, Michael Steinhorst, Horst Walter Tamler, Roland Wunderlich
  • Patent number: 7851067
    Abstract: A coated metal article such as, e.g., a tool, which article comprises a body part comprising a substantially carbon-free precipitation-hardened iron-cobalt-molybdenum/tungsten-nitrogen alloy and carries a coating. The coating has been applied by a PVD method and/or a CVD method and comprises a substantially single-phase crystalline, cubic face-centered structure. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: December 14, 2010
    Assignee: Boehler Edelstahl GmbH
    Inventors: Devrim Caliskanoglu, Christian Mitterer
  • Publication number: 20100227195
    Abstract: There is provided a wear and impact resistant liner component (1) for use in mining and quarrying industries comprising a rubber matrix rigidly supported on a steel plate (2), said rubber matrix having been provided with a plurality of steel strips (3) spaced apart from each other.
    Type: Application
    Filed: August 22, 2006
    Publication date: September 9, 2010
    Applicant: Tega Industries Limited
    Inventors: Imam Syed Yaver, Gour Das, Paul Biswadeep
  • Publication number: 20100003540
    Abstract: Disclosed is a multilayered steel composite which compatibly achieves properties such as strength and ductility that are incompatible in conventional steels and is excellent in strength, ductility, weldability, toughness and fatigue strength. Also, disclosed is a method for producing the multilayered steel which is produced by rolling with least two kinds of steels having different chemical compositions and microstructure or different mechanical properties, in combination.
    Type: Application
    Filed: July 26, 2007
    Publication date: January 7, 2010
    Applicant: The University of Tokyo
    Inventors: Toshihiko Koseki, Toshio Suzuki, Toyonobu Yoshida, Junya Inoue, Mitsuyuki Tanaka
  • Publication number: 20090220819
    Abstract: A bimetallic doctor blade (1) has a support strip (20) made of conventionally produced steel and a working edge (10) made of a steel produced by a powder metallurgical process. Also disclosed is a method for producing this type of bimetallic doctor blade (1), wherein a flat wire is produced from metal powder by a powder metallurgical process, and the flat wire is then welded to a conventionally produced support strip (20) made of steel in order to form a bimetallic doctor blade with a support strip (20) and a working edge (10).
    Type: Application
    Filed: December 29, 2006
    Publication date: September 3, 2009
    Inventors: Gregor Innitzer, Leander Ahorner
  • Publication number: 20080220308
    Abstract: Provided is a first method for producing a source blank for a clad steel sheet composed of a stainless steel containing 0 to 0.3% B as a core component and a stainless steel containing 0.3 to 2.
    Type: Application
    Filed: March 14, 2008
    Publication date: September 11, 2008
    Inventors: Motomichi Kanbe, Kunihiko Ushio, Takeo Yazawa, Hideaki Yamamoto, Yoshio Tarutani, Akira Seki
  • Patent number: 6899966
    Abstract: A composite surface having a thickness from 10 to 5,000 microns comprising a spinel of the formula MnxCr3?xO4 wherein x is from 0.5 to 2 and oxides of Mn, Si selected from the group consisting of MnO, MnSiO3, Mn2SiO4 and mixtures thereof which are not prone to coking and are suitable for hydrocarbyl reactions such as furnace tubes for cracking.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: May 31, 2005
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Leslie Wilfred Benum, Michael C. Oballa, Sabino Steven Anthony Petrone
  • Patent number: 6803118
    Abstract: A semi-hard magnetic alloy for activation strips in magnetic anti-theft security systems is disclosed that contains 8 to 25 weight % Ni, 1.0 to 4.5 weight % Al, 0.5 to 3 weight % Ti and the balance iron.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: October 12, 2004
    Assignee: Vacuumschmelze GmbH
    Inventors: Hartwin Weber, Gernot Hausch, Ottmar Roth
  • Patent number: 6777106
    Abstract: The present invention is directed to a metal block suitable for machining, the metal block comprising at least two superimposed metal plates, each having a thickness of at least 12.5 mm, wherein the yield strength of the block is at least 75% of the yield strength of the initial metal plate(s). The present invention is further directed to methods for manufacturing such blocks from two or more thick metal plates by explosive welding and other methods. Blocks according to the present invention are useful, for example, for manufacturing aircraft structural components or injection molds for plastics or rubber.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: August 17, 2004
    Assignee: Pechiney Rhenalu
    Inventors: Frédéric Catteau, David Godard
  • Patent number: 6686061
    Abstract: A weldable structural steel product having fine complex precipitates of TiN and CuS is provided which contains, in terms of percent by weight, 0.03 to 0.17%C, 0.01 to 0.05% Si, 0.4 to 2.0% Mn, 0.005 to 0.2% Ti, 0.0005 to 0.1% Al, 0.008 to 0.030% N, 0.0003 to 0.01% B, 0.001 to 0.2% W, 0.1 to 1.5% Cu, at most 0.03% P, 0.003 to 0.05% S, at most 0.005% O, and balance Fe and incidental impurities while satisfying conditions of 1.2≦Ti/N≦2.5, 10≦N/B≦40, 2.5≦Al/N≦7, 6.5≦(Ti+2Al+4B)/N≦14, and 10≦Cu/S≦90, and having a microstructure essentially consisting of a complex structure of ferrite and pearlite having a grain size of 20 &mgr;m or less.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: February 3, 2004
    Assignee: Posco
    Inventors: Hong-Chul Jeong, Hae-Chang Choi
  • Publication number: 20040013898
    Abstract: Redundantly constrained laminar structures as weak-link mechanisms and a novel method for manufacturing the redundantly constrained laminar structures as weak-link mechanisms are provided. The method for producing the redundantly constrained laminar structures as weak-link mechanisms is carried out by lithographic techniques. A designed pattern is repeatedly chemically etched with a mask to produce a plurality of individual identical units. The units are stacked together to form the laminar structure and are secured together with fasteners. A high quality adhesive can be applied to the sides of the laminar structure to provide the mechanism equivalent to a single piece mechanism. The redundantly constrained laminar structures as weak-link mechanisms of the invention include a stack of a plurality of thin material structures.
    Type: Application
    Filed: July 14, 2003
    Publication date: January 22, 2004
    Applicant: THE UNIVERSITY OF CHICAGO
    Inventors: Deming Shu, Thomas S. Toellner, E. Ercan Alp
  • Patent number: 6663981
    Abstract: A marker for use in a magnetic anti-theft security system has an amorphous ferromagnetic alloy alarm strip and at least one activation strip. The semi-hard magnetic alloy for the activation strip contains 8 to 25 weight % Ni, 1.5 to 4.5 weight % Al, 0.5 to 3 weight % Ti and balance of iron. The alloy is distinguished over known, employed alloys by excellent magnetic properties and a high resistance to corrosion. Further, the alloy can be excellently cold-worked before the annealing.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: December 16, 2003
    Assignee: Vacuumschmelze GmbH
    Inventors: Hartwin Weber, Gernot Hausch, Ottmar Roth
  • Patent number: 6623869
    Abstract: A metallic material of the invention which comprises, in mass %, C: not more than 0.2%, Si: 0.01-4%, Mn: 0.05-2%, P: not more than 0.04%, S: not more than 0.015%, Cr: 10-35%, Ni: 30-78%, Al: not less than 0.005% but less than 4.5%, N: 0.005-0.2%, and one or both of Cu: 0.015-3% and Co: 0.015-3%, with the balance substantially being Fe, and of which the value of 40Si+Ni+5Al+40N+10 (Cu+Co), wherein the symbols of elements represent the contents of the respective elements, is not less than 50 and has excellent corrosion resistance in an environment in which metal dusting is ready to occur and, therefore, can be utilized as or in heating furnace pipes, piping systems, heat exchanger pipes and so forth to be used in a petroleum refinery or in petrochemical plants, and can markedly improve the equipment durability and safety.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: September 23, 2003
    Inventors: Yoshitaka Nishiyama, Nobuo Otsuka
  • Patent number: 6609830
    Abstract: A multilayer engine bearing (10) includes a steel backing (12) having a liner (14) of bearing metal of either copper-lead or aluminum alloys formed on the backing (12). A multilayer overplate (24, 124) is formed on the base lining member (16) and includes at least a first layer (28, 128) electrodeposited from a bath at a first current density to a desired thickness, and at least one additional layer (26, 126) electrodeposited from the same bath but at a different current density and to a desired thickness to yield a composite lamellar overplate structure having layers with differing deposit characteristics, such as hard and soft layers, generated from the same bath at different current densities.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: August 26, 2003
    Assignee: Federal-Mogul World Wide, Inc.
    Inventors: Brian L. Bank, James R. Toth
  • Patent number: 6607840
    Abstract: Redundantly constrained laminar structures as weak-link mechanisms and a novel method for manufacturing the redundantly constrained laminar structures as weak-link mechanisms are provided. The method for producing the redundantly constrained laminar structures as weak-link mechanisms is carried out by lithographic techniques. A designed pattern is repeatedly chemically etched with a mask to produce a plurality of individual identical units. The units are stacked together to form the laminar structure and are secured together with fasteners. A high quality adhesive can be applied to the sides of the laminar structure to provide the mechanism equivalent to a single piece mechanism. The redundantly constrained laminar structures as weak-link mechanisms of the invention include a stack of a plurality of thin material structures.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: August 19, 2003
    Assignee: The University of Chicago
    Inventors: Deming Shu, Thomas S. Toellner, E. Ercan Alp
  • Patent number: 6420054
    Abstract: Masking device for a color cathode-ray display tube with a flat scree, of the type comprising a support frame for a tensioned shadowmask and a tensioned shadowmask mounted on the support frame so as to undergo tensioning at room temperature, in which device the support frame is made of a hardened Fe—Ni alloy having a thermal expansion coefficient between 20° and 150° C. of less than 5×1031 6 K−1 and a yield stress Rp0.2 at 20° C. of greater than 700 MPa, and the tensioned shadowmask is made of a hardened FeNi or Fe—Ni alloy having a thermal expansion coefficient between 20° C. and 150° C. of less than 5×10−6 K−1.
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: July 16, 2002
    Assignee: Imphy Ugine Precision
    Inventors: Ricardo Cozar, Pierre-Louis Reydet, Jean-Pierre Reyal
  • Patent number: 6419806
    Abstract: Method of forming a two-piece hollow cathode sputter target assembly and the assembly formed thereby. The sputter target assembly includes an outer shell having a substantially cylindrical side wall and is composed of a relatively low purity metallic material. A sputtering insert includes a substantially cylindrical side wall and is concentrically received within, and bonded to, the outer shell. The sputtering insert is composed of a relatively high purity metallic material as used for depositing a thin layer or film onto a desired substrate.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: July 16, 2002
    Assignee: Tosoh SMD, Inc.
    Inventors: Melvin K. Holcomb, William E. Barnes, Steven L. Bardus
  • Patent number: 6416879
    Abstract: The object of the present invention is to provide an Fe-based amorphous alloy thin strip capable of realizing an excellent soft magnetic property for use in alternating current applications while keeping a high magnetic flux density even in a composition range with a high Fe content, and an Fe-based amorphous alloy thin strip with which a core having an excellent soft magnetic property can be manufactured, even if there occurs a temperature difference among different portions of the core during annealing. The present invention is an Fe-based amorphous alloy thin strip having a high magnetic flux density, consisting of the main component elements of Fe, Si, B, C, and P and unavoidable impurities, characterized by having: a composition, in atomic %, of 82<Fe≦90, 2≦Si<4, 5<B≦16, 0.02≦C≦4, and 0.2≦P≦12; Bs of 1.74 T or more after annealing; B80 exceeding 1.5 T; and a low core loss of 0.12 W/kg or less.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: July 9, 2002
    Assignee: Nippon Steel Corporation
    Inventors: Hiroaki Sakamoto, Yuichi Sato
  • Publication number: 20020060200
    Abstract: Redundantly constrained laminar structures as weak-link mechanisms and a novel method for manufacturing the redundantly constrained laminar structures as weak-link mechanisms are provided. The method for producing the redundantly constrained laminar structures as weak-link mechanisms is carried out by lithographic techniques. A designed pattern is repeatedly chemically etched with a mask to produce a plurality of individual identical units. The units are stacked together to form the laminar structure and are secured together with fasteners. A high quality adhesive can be applied to the sides of the laminar structure to provide the mechanism equivalent to a single piece mechanism. The redundantly constrained laminar structures as weak-link mechanisms of the invention include a stack of a plurality of thin material structures.
    Type: Application
    Filed: August 15, 2001
    Publication date: May 23, 2002
    Applicant: THE UNIVERSITY OF CHICAGO
    Inventors: Deming Shu, Thomas S. Toellner, E. Ercan Alp
  • Patent number: 6391479
    Abstract: A coated metal component made of an alloy containing an intentional addition of nitrogen, comprising an oxidation-resistant coating layer and an intermediate layer disposed between the oxidation-resistant coating layer and the component. The intermediate layer is substantially devoid of nitrogen which if present would form a nitride with the oxidation-resistant layer.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: May 21, 2002
    Assignee: General Electric Company
    Inventor: John Herbert Wood
  • Patent number: 6387535
    Abstract: Sheet having a multilayer structure, called a sandwich sheet, composed of two rolled metal skins which are joined together by a core, in which sheet the core contains a stainless steel wool.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: May 14, 2002
    Assignee: Usinor
    Inventor: Marc Mantel
  • Patent number: 6379487
    Abstract: A method of forming a laminate used in the manufacture of printed circuit boards, comprising the steps of applying a layer of chromium having a thickness from about 30 grams per square meter to about 160 grams per square meter to each side of a steel substrate having a thickness from about 0.10 mm to about 0.20 mm. Applying a layer of copper having a thickness from about 2 &mgr;m to about 70 &mgr;m to each of the chromium layers. Positioning the steel substrate between two dielectric layers with adhesive disposed between the copper layers and the dielectric layers. Applying heat and pressure to the layers to bond the copper layers to the dielectric layers. Separating the steel substrate from the copper layers, and discarding the steel substrate.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: April 30, 2002
    Assignee: GA-TEK Inc.
    Inventors: Bernd Schneider, R. Richard Steiner
  • Patent number: 6379014
    Abstract: A graded anti-reflective coating (ARC) with one or more layers has a bottom layer that is highly absorbing at the lithographic wavelength, and one or more layers between the substrate and the resist layer having inhomogeneous optical constants. The refractive indices are matched across layer interfaces, and the optical constants vary smoothly through the layer thicknesses. In each layer the extinction coefficient and the refractive index have independently selectable values and gradients. This ARC structure provides almost total absorption in the bottom layer and near-zero reflection at the resist interface and all other intermediate interfaces. Layers are preferably of inorganic materials, typically SiOxNy. Because of its highly absorbing bottom layer, an ARC according to an embodiment of the present invention works effectively over diverse substrate materials for a variety of lithographic wavelengths. It provides great latitude of manufacturing tolerances for thicknesses and optical constants.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: April 30, 2002
    Assignee: N & K Technology, Inc.
    Inventors: Guoguang Li, Dale A. Harrison, Abdul Rahim Forouhi
  • Patent number: 6360936
    Abstract: In a method of manufacturing composite sheet steel of maraging steel, wherein the composite sheet steel comprises an outer layer and an inner layer, wherein the outer layer is harder than the inner layer and the inner layer is more tenacious than the outer layer, the steel of the inner layer is produced with a chemical composition containing in percent by weight: C≦0.01, Si≦0.1, Mn≦0.1, P≦0.005, S≦0.005, Cu≦0.1, Mo 4.80 to 5.20, Ni 17.5 to 18.5 , Cr≦0.1, Ti 0.55 to 0.70, Co 8.0 to 9.0; and the steel of the outer layer is produced with purification in a zone melting process with a chemical composition containing in percent by weight: C≦0.01, Si<0.1, Mn 0.02 to 0.20, P≦0.005, S≦0.005, Cu 0.01 to 0.20, Mo 4.80 to 5.20, Ni 17.5 to 18.5, Cr 0.01 to 0.20, Ti 1.80 to 1.95, Co 14.0 to 15.5, Al 0.05 to 0.15, with the remainder being Fe and contaminants resulting from the manufacturing process, respectively.
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: March 26, 2002
    Assignee: Aktiengesellschaft der Dillinger Hüttenwerke
    Inventors: Christoph Dilg, Uwe Hofmann, Claus Just, Hans-Jürgen Rögele, Helmut Schönberger, Jürgen Vogt
  • Patent number: 6350533
    Abstract: A sheet metal component, obtained by press-forming a one-piece metal sheet comprised of two metal sheets into a desired shape, has an expanding portion having an external appearance varying in dependence on a weld state of a weld portion of the one-piece metal sheet at which the two metal sheets are welded at their confronting ends. In manufacturing the sheet metal component, the one-piece metal sheet is transferred between upper and lower dies of a pressing machine and is positioned such that its metal sheet section including part of the weld portion is disposed between a punch formed in the lower die and a recess formed in the upper die so as to face the punch. The metal sheet section is pressed by the punch to be subject to plastic deformation, whereby the expanding portion is formed.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: February 26, 2002
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki
    Inventors: Kiyoshi Goto, Toshiyuki Komizo, Masayuki Enomoto
  • Publication number: 20020013225
    Abstract: Thermally integrated monolith catalysts active for catalyzing the oxidative conversion of methane to CO and H2 are disclosed. The composition and multi-layer configuration facilitates heat balancing between exothermic and endothermic reactions that take place in different sections of the monolith in a short contact time syngas reactor. The monolith comprises an active catalyst material supported by a multi-layer structure made of thin, porous metal pieces, the opposing faces of which are joined together at their perimeters. The metal pieces may be perforated disks made of at least two metals or metal oxides, and may also include a metal oxide coating.
    Type: Application
    Filed: February 16, 2001
    Publication date: January 31, 2002
    Inventors: Juan C. Figueroa, Anne M. Gaffney, John E. Anderson, John J. Barnes, Robert A. Oswald, Roger Song
  • Patent number: 6309762
    Abstract: An article of manufacture having a wear-resistant cylindrical surface is made up of a metallurgically tough base steel with a substantially cylindrical surface, a thin, cylindrical metal sleeve mated to and affixed to the cylindrical surface of the base steel, and a composite metallic coating containing particles having a hardness greater than Rockwell C 70 metallurgically bonded to the surface of the sleeve opposite the base steel/sleeve interface.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: October 30, 2001
    Assignee: Conforma Clad
    Inventor: Michael A. Speckert
  • Patent number: 6284388
    Abstract: The present invention is directed to a method of forming an electrically insulating layer on a steel article such as a stack of electrical steel laminations or an individual, unstacked electrical steel lamination, comprising exposing the article to an oxidation atmosphere, and to a temperature (such as at least about 800° F.) for a time sufficient to form on the article an electrically insulating layer comprising hematite. The hematite layer is effective to provide the article with a surface resistivity characterized by an F-amp value of not greater than about 0.85 at a test pressure of 50 psi and a transfer surface roughness of about 10 microinches (Ra). Also featured is a steel article having the electrically insulating layer formed thereon.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: September 4, 2001
    Assignee: LTV Steel Company, Inc.
    Inventors: Richard J. Blotzer, Jeffrey P. Anderson, Barry A. Lauer
  • Patent number: 6255005
    Abstract: Provided is a composite magnetic member made of a single material combining a ferromagnetic portion and a non-magnetic portion in which the ferromagnetic portion has better soft magnetism than conventional members and the non-magnetic portion has the same stable characteristic as conventional members. A method of producing the ferromagnetic portion of the member and a method of forming the non-magnetic portion are also provided. The composite magnetic member is made of an Fe—Cr—C-base alloy steel containing 0.1 to 5.0 weight % Al and has a ferromagnetic portion with a maximum magnetic permeability of not less than 400 and a non-magnetic portion with a magnetic permeability of not more than 2. In this member the number of carbides with a grain size of not less than 0.1 &mgr;m is regulated to not more than 50 in an area of 100 &mgr;m2 and the proportion of the number of carbides with a grain size of not less than 1.0 &mgr;m to the number of all carbides is controlled to not less than 15%.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: July 3, 2001
    Assignee: Hitachi Metals, Ltd.
    Inventors: Shin-ichiro Yokoyama, Tsutomu Inui, Hideya Yamada
  • Patent number: 6245441
    Abstract: This is a composite magnetic member excellent in corrosion resistance having a chemical composition consisting essentially, by weight, of 0.30 to 0.80% C, more than 16.0% but not more than 25.0% Cr, 0.1 to 4.0% Ni, 0.1 to 0.06% N, at least one kind not more than 2.0% in total selected from the group consisting of Si, Mn and Al, and the balance Fe and impurities, and having a ferromagnetic portion and a non-magnetic portion.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: June 12, 2001
    Assignees: Hitachi Metals, Ltd., Denso Corporation
    Inventors: Shin-ichiro Yokoyama, Tsutomu Inui, Yoshihiro Tanimura
  • Patent number: 6221501
    Abstract: The present invention is directed to a method of forming an electrically insulating layer on a steel article such as a stack of electrical steel laminations or an individual, unstacked electrical steel lamination, comprising exposing the article to an oxidation atmosphere, and to a temperature (such as at least about 800° F.) for a time sufficient to form on the article an electrically insulating layer comprising hematite. The hematite layer is effective to provide the article with a surface resistivity characterized by an F-amp value of not greater than about 0.85 at a test pressure of 50 psi and a transfer surface roughness of about 10 micro inches (Ra). Also featured is a steel article having the electrically insulating layer formed thereon.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: April 24, 2001
    Assignee: LTV Steel Company, Inc.
    Inventors: Richard J. Blotzer, Jeffrey P. Anderson, Barry A. Lauer
  • Patent number: 6197440
    Abstract: A magnetic recording medium comprises a stack of four magnetic layers. The first magnetic layer 11 is a layer for reproducing information recorded on the medium. The third magnetic layer 13 is a storage layer for storing information recorded on the medium in the form of domain walls. The second magnetic layer 12 has a lower Curie temperature Ts than the first and third magnetic layers and is interposed between the first and third magnetic layers. The fourth magnetic layer 14 is interposed between the first 11 and second 12 magnetic layers, and has a larger domain wall energy density than that of the first magnetic layer 11.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: March 6, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tsutomu Shiratori
  • Patent number: 6177203
    Abstract: Diffusion bonding techniques are extended to the simultaneous bonding of an array of multilevel piece parts. The problems of uneven expansion and contraction of different levels of different piece parts in the array are obviated by positioning each level of the array within a frame. The stack of frames is pinned in one corner. The opposite corner of the array has a slot at a 45° angle with respect to the x and y axes of the array. The slot engages a pin and allows the entire array to expand and contract along the slot in a manner to maintain the registration of features between respective levels of each piece part.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: January 23, 2001
    Assignee: Opto Power Corporation
    Inventor: Juan Alfonso Garcia
  • Patent number: 6150038
    Abstract: A reproducing layer, an intermediate layer, and a recording layer are successively stacked. The reproducing layer is made of a perpendicularly magnetized film whose domain wall coercivity is relatively smaller and whose domain wall mobility is relatively larger as compared with the recording layer around a reproducing temperature. When the reproducing layer, the intermediate layer, and the recording layer have Curie temperatures of Tc1, Tc2, and Tc3, Tc1, Tc2, and Tc3 satisfy a relationship of Tc2<Tc1<Tc3. Upon reproducing information, the reproducing layer is partially heated to more than the Curie temperature by irradiating with a light beam. This arrangement makes it possible to expand and reproduce a domain without causing a repetition of reproduction and to reproduce a signal having a period which is not more than an optical diffraction limit without reducing an amplitude of the reproduced signal, thereby dramatically improving a recording density.
    Type: Grant
    Filed: April 27, 1999
    Date of Patent: November 21, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Junji Hirokane, Noboru Iwata
  • Patent number: 6127045
    Abstract: A magnetic tunnel junction (MTJ) device is usable as a magnetic field sensor in magnetic disk drives or as a memory cell in a magnetic random access (MRAM) array. The MTJ device has a "pinned" ferromagnetic layer whose magnetization is oriented in the plane of the layer but is fixed so as not to be able to rotate in the presence of an applied magnetic field in the range of interest, a "free" ferromagnetic layer whose magnetization is able to be rotated in the plane of the layer relative to the fixed magnetization of the pinned ferromagnetic layer, and an insulating tunnel barrier layer located between and in contact with both ferromagnetic layers. The pinned ferromagnetic layer is pinned by interfacial exchange coupling with an adjacent antiferromagnetic layer. A high spin polarization ferromagnetic layer (Ni.sub.40 --Fe.sub.60) is placed near the tunnel barrier layer in both the pinned and free layers to enhance the magnetoresistive effect. The undesirable positive magnetostriction coefficient of the Ni.sub.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: October 3, 2000
    Assignee: International Business Machines Corporation
    Inventor: Hardayal Harry Singh Gill