Patents Examined by Deborah Yee
  • Patent number: 9997283
    Abstract: Provided is a grain-oriented electric steel sheet having superior magnetic property and to a grain-oriented electric steel sheet including 2.0 to 4.5 weight % of Si, 0.001 to 0.10 weight % of C, 0.010 weight % or lower of Al, 0.08 weight % or lower of Mn, 0.005 weight % or lower of N, 0.002 to 0.050 weight % of S, the remainder being Fe and other unavoidable impurities. The steel sheet having been subjected to secondary recrystallization using at least any one of grain boundary-segregated elementary S and an FeS precipitate as a grain growth inhibitor.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: June 12, 2018
    Assignee: POSCO
    Inventors: Kyu-Seok Han, Jae-Soo Lim, Byung-Deug Hong, Chan-Hee Han
  • Patent number: 9994927
    Abstract: A support may include a hollow metallic tube having two opposing ends and a body extending over a longitudinal axis of the tube. The tube may have a steel composition that may include, by weight, the following concentrations: approximately 0.19 to 0.27% carbon; approximately 0.0005% to 0.004% boron; approximately 1.5% to 2.5% manganese; and less than or equal to approximately 0.35% chromium, the balance including iron and inevitable impurities.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: June 12, 2018
    Assignee: L&W Engineering
    Inventors: Jim Wines, Joshua Forquer, Jason Bigelow
  • Patent number: 9988701
    Abstract: A method for coating a substrate, in which a wire-shaped spray material is melted in an electric arc and is deposited as a functional layer on the substrate. The invention also relates to a functional layer which can be produced on the substrate by this method. The functional layer has a high hardness value and good corrosion resistance on exposure to diesel fuel with a high sulphur proportion.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: June 5, 2018
    Assignee: Daimler AG
    Inventors: Eyuep Akin Oezdeniz, Rainer Joos, Wolfgang Hansen, Michael Walker, Uemit Akay
  • Patent number: 9976204
    Abstract: A casting of a white cast iron alloy and a method of producing the casting are disclosed. A white cast alloy is also disclosed. The casting has a solution treated microstructure that comprises a ferrous matrix of retained austenite and chromium carbides dispersed in the matrix, with the carbides comprising 15 to 60% volume fraction of the alloy. The matrix composition comprises: manganese: 8 to 20 wt %; carbon: 0.8 to 1.5 wt %; chromium: 5 to 15 wt %; and iron: balance (including incidental impurities).
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: May 22, 2018
    Assignee: Weir Minerals Australia Ltd
    Inventor: Kevin Dolman
  • Patent number: 9976206
    Abstract: A rolled round steel material contains C: 0.38 to 0.55%, Si: 1.0% or less, Mn: 0.20 to 2.0%, S: 0.005 to 0.10%, Cr: 0.01 to 2.0%, Al: 0.003 to 0.10%, B: 0.0005 to 0.0030%, Ti: 0.047% or less, Cu: 0 to 1.0%, Ni: 0 to 3.0%, Mo: 0 to 0.50%, Nb: 0 to 0.10%, V: 0 to 0.30%, Ca: 0 to 0.005%, and Pb: 0 to 0.30%, a remaining portion being constituted by Fe and an impurities, the impurities containing P in an amount of 0.030% or less and N in an amount of 0.008% or less, and has a chemical composition satisfying [3.4N?Ti?3.4N+0.02]. The microstructure is constituted by ferrite (F), lamellar pearlite (LP), and cementite (C) and microstructural features vary in terms of the lateral, longitudinal and central portions of the steel. This steel material has a high base material toughness and good machinability without performing thermal refining.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: May 22, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Makoto Egashira, Sadanori Horikami, Masashi Higashida, Takahiro Okada, Yutaka Neishi, Tatsuya Hasegawa, Hitoshi Matsumoto
  • Patent number: 9976203
    Abstract: A cold rolled, annealed TRIP steel sheet which has a composition including (in wt. %): C: 0.1-0.3; Mn: 4-10, Al: 0.05-5, Si: 0.05-5; and Nb: 0.008-0.1, the remainder being iron and inevitable residuals. The cold rolled sheet has an ultimate tensile strength of at least 1000 MPa, and a total elongation of at least 15%. The cold rolled sheet may have at least 20% retained austenite in its microstructure and may have greater than 50% lath-type annealed ferrite structure. The cold rolled sheet may have an ultra fine grain size of less than 5 micron for the retained austenite and ferrite.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: May 22, 2018
    Assignee: ArcelorMittal
    Inventors: Hyun Jo Jun, Narayan Subramaniam Pottore, Nina Michailovna Fonstein, Oleg N. Yakubovsky
  • Patent number: 9976205
    Abstract: The invention relates to a steel and to a flat steel product produced therefrom that have optimized mechanical properties and at the same time can be produced at low cost, without having to rely for this on expensive alloying elements that are subject to great fluctuations with regard to their procurement costs. The steel and the flat steel product have for this purpose the following composition according to the invention (in % by weight): C: 0.11-0.16%; Si: 0.1-0.3%; Mn: 1.4-1.9%; Al: 0.02-0.1%; Cr: 0.45-0.85%; Ti: 0.025-0.06%; B: 0.0008-0.002%, the remainder Fe and impurities that are unavoidable for production-related reasons, which include contents of phosphorus, sulfur, nitrogen or molybdenum as long as the following respectively apply for their contents: P: ?0.02%, S: ?0.003%, N: ?0.008%, Mo: ?0.1%. Similarly, the invention relates to a method for producing a flat steel product that consists of a steel according to the invention.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: May 22, 2018
    Assignee: ThyssenKrupp Steel Europe AG
    Inventors: Ekatherina Bocharova, Sigrun Ebest, Dorothea Mattissen, Roland Sebald
  • Patent number: 9978489
    Abstract: Provides is a method of producing a grain oriented electrical steel sheet by heating a steel slab having a predetermined composition, then subjecting the slab to hot rolling to obtain a hot rolled sheet, then optionally subjecting the hot rolled sheet to hot band annealing and subsequent cold rolling once, or twice or more with intermediate annealing performed therebetween to obtain a cold rolled sheet with final sheet thickness, then subjecting the cold rolled sheet to primary recrystallization annealing and subsequent secondary recrystallization annealing, in which the aging index AI of the steel sheet before final cold rolling is set to 70 MPa or less to effectively grow Goss-oriented grains to thereby obtain a grain-oriented electrical steel sheet with good magnetic properties, without the restriction of containing a relatively large amount of C.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: May 22, 2018
    Assignee: JFE STEEL CORPORATION
    Inventors: Masanori Takenaka, Takeshi Imamura, Yasuyuki Hayakawa, Yukihiro Shingaki
  • Patent number: 9970074
    Abstract: A cold-rolled steel sheet includes a predetermined chemical composition, and includes a structure expressed by: an area fraction of ferrite: 95% or more; an area fraction of retained austenite and an area fraction of martensite: 1% to 3% in total; a product of the area fraction of retained austenite and a carbon concentration in retained austenite: 1 or more; a value of I(111)/{I(100)+I(110)} at a region where a depth from a surface is ¼ of a thickness of the cold-rolled steel sheet when intensity of a (hkl) plane is expressed by I(hkl): 2 or less.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: May 15, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kaoru Kawasaki, Masaharu Kameda, Kohichi Sano, Riki Okamoto
  • Patent number: 9973068
    Abstract: A copper alloy having the following composition (in % by weight): in each case 0.05 to 0.5% of at least three elements selected from the group consisting of Ag, Ni, Zn, Sn and Al, remainder Cu and unavoidable impurities, optionally 0.01 to 0.2% of one or more elements selected from the group consisting of Mg, Ti, Zr, B, P, As, Sb. Also, a current-carrying structural part made of a copper alloy and a cage rotor having multiple conductor bars and two short-circuiting rings, which are cast in one piece from a copper alloy.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: May 15, 2018
    Assignee: WIELAND-WERKE AG
    Inventors: Timo Allmendinger, Tony Robert Noll, Joachim Riedle, Gerhard Thumm
  • Patent number: 9957594
    Abstract: A high strength, high toughness steel alloy is disclosed. The alloy has the following weight percent composition. Element C 0.30-0.55 Mn ?0.6-1.75 Si 0.9-2.8 Cr 0.6-2.5 Ni 2.70-7.0? Mo + ½ W 0.25-1.3? Cu 0.30-1.25 Co ?0.01 max. V + ( 5/9) × Nb 0.10-1.0? Ti ?0.01 max. Al 0.015 max. Ca 0.005 max. The alloy further includes a grain refining element selected from the group consisting of 0.0001-0.01% Mg, 0.001-0.025% Y, and a combination thereof. The balance of the alloy is iron and the usual impurities found in commercial grades of steel alloys produced for similar use and properties. In this regard phosphorus is limited to not more than about 0.01% and sulfur is limited to not more than about 0.001%. Also disclosed is a hardened and tempered article that has very high strength and fracture toughness. The article is formed from the alloy having the weight percent composition set forth above.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: May 1, 2018
    Assignee: CRS HOLDINGS, INC.
    Inventor: Paul M. Novotny
  • Patent number: 9932867
    Abstract: An iron-based alloy includes (in weight percent) carbon from about 1 to about 2 percent; manganese up to about 1 percent; silicon up to about 1 percent; nickel up to about 4 percent; chromium from about 10 to about 25 percent; molybdenum from about 5 to about 20 percent; tungsten up to about 4 percent; cobalt from about 17 to about 23 percent; vanadium up to about 1.5 percent; boron up to about 0.2 percent; sulfur up to about 0.03 percent; nitrogen up to about 0.4 percent; phosphorus up to about 0.06 percent; niobium up to about 4 percent; iron from about 35 to about 55 percent; and incidental impurities. The chromium/molybdenum ratio of the iron-based alloy is from about 1 to about 2.5. The alloy is suitable for use in elevated temperature applications, such as valve seat inserts for combustion engines.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: April 3, 2018
    Assignee: L.E. Jones Company
    Inventors: Cong Yue Qiao, David Doll, Todd Trudeau, Peter Vennema
  • Patent number: 9920409
    Abstract: Provided is stainless steel foil that is suitably used for forming a catalyst carrier for an exhaust gas purifying facility, the catalyst carrier being installed in a vehicle that discharges exhaust gas having a temperature lower than the temperature of exhaust gas of a gasoline-powered automobile. The ferritic stainless steel foil contains, by mass %, C: 0.05% or less, Si: 2.0% or less, Mn: 1.0% or less, S: 0.005% or less, P: 0.05% or less, Cr: 11.0% to 25.0%, Ni: 0.05% to 0.30%, Al: 0.01% to 1.5%, Cu: 0.01% to 2.0%, N: 0.10% or less, and the balance being Fe and inevitable impurities.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: March 20, 2018
    Assignee: JFE Steel Corporation
    Inventors: Akito Mizutani, Mitsuyuki Fujisawa, Hiroki Ota, Hiroyuki Ogata
  • Patent number: 9920391
    Abstract: A high-strength hot-rolled steel strip or sheet with tensile strength of 570 to 870 MPa and an excellent combination of total elongation, stretch-flange formability, as well as fatigue resistance and to a method of manufacturing the steel strip or sheet and a chassis part made thereof.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: March 20, 2018
    Assignee: TATA STEEL IJMUIDEN B.V.
    Inventor: Rolf Arjan Rijkenberg
  • Patent number: 9908566
    Abstract: A high strength hot rolled steel sheet with an excellent combination of tensile strength of at least 550 MPa and formability, including weight percent at most 0.15% of C, at most 0.5% of Si, between 0.5 and 2.0% of Mn, at most 0.06% of P, at most 0.008% of S, at most 0.1% of Al sol, at most 0.02% of N, between 0.02 and 0.45% of V, between 0.05 and 0.7% of Mo, optionally between 0.01 and 0.1% of Nb, balance of Fe and inevitable impurities, wherein the steel sheet has a precipitation strengthened and substantially single-phase ferritic microstructure, wherein the volume fraction of the ferrite phase in said microstructure is not lower than 97%, and wherein the precipitates in the microstructure comprise fine precipitates of composite carbides containing Mo and V and optionally Nb.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: March 6, 2018
    Assignee: TATA STEEL IJMUIDEN B.V.
    Inventors: Rolf Arjan Rijkenberg, David Neal Hanlon
  • Patent number: 9909198
    Abstract: The low alloy steel for oil country tubular goods according to the present invention has a chemical composition containing, by mass percent, C: 0.56 to 1.00%, Si: 0.05 to 0.50%, Mn: 0.05 to 1.00%, P: at most 0.025%, S: at most 0.010%, Al: 0.005 to 0.100%, Mo: 0.40 to 1.00%, V: 0.05 to 0.30%, and O: at most 0.010%, the balance being Fe and impurities, wherein the yield stress thereof is at least 862 MPa, and the half-value width of a [211] crystal surface obtained by X-ray diffraction is at most 0.50°.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: March 6, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tomohiko Omura, Yuji Arai, Kaori Kawano, Akihiro Sakamoto, Kazuo Okamura, Kenji Yamamoto, Keiichi Kondo
  • Patent number: 9903023
    Abstract: A hot rolled steel sheet consisting of, in mass %, C: 0.05% to 0.15%, Si: 0% to 0.2%, Al: 0.5% to 3.0%, Mn: 1.2% to 2.5%, P: 0.1% or less, S: 0.01% or less, N: 0.007% or less, Ti: 0.03% to 0.10%, Nb: 0.008% to 0.06%, V: 0% to 0.12%, one or more of Cr, Cu, Ni, and Mo: 0% to 2.0% in total, B: 0% to 0.005%, one or more of Ca, Mg, La, and Ce: 0% to 0.01% in total, total amount of Si and Al: 0.8×(Mn?1)% or more, total amount of Ti and Nb: 0.04% to 0.14%, and the balance: Fe and impurities. In a structure of steel, a total area ratio of martensite and retained austenite is 3% to 20%, an area ratio of ferrite is 50% to 96%, and an area ratio of pearlite is 3% or less. In a superficial layer part, the thickness in a sheet thickness direction of a region in which a network-like oxide is present is less than 0.5 ?m, and a maximum tensile strength is 720 MPa or more.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: February 27, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Naoki Maruyama, Tatsuo Yokoi, Hiroyuki Tanahashi, Atsushi Seto, Atsushi Itami
  • Patent number: 9903004
    Abstract: A hot-rolled steel sheet having a tensile strength of 900 MPa or more, the hot-rolled steel sheet consisting of, in mass %, C: greater than 0.050% and less than or equal to 0.10%, Si: greater than or equal to 0.1% and less than or equal to 2.0%, Mn: greater than or equal to 1.0% and less than or equal to 3.0%, P: less than or equal to 0.1%, S: less than or equal to 0.01%, Al: greater than or equal to 0.005% and less than or equal to 0.05%, N: less than or equal to 0.01%, Ti: greater than or equal to 0.10% and less than or equal to 0.20%, Nb: greater than or equal to 0% and less than or equal to 0.06%, B: greater than or equal to 0% and less than or equal to 0.03%, Ca: greater than or equal to 0% and less than or equal to 0.005%, and the balance: Fe and impurities. An average crystal grain size is less than or equal to 7.0 ?m, and an X-ray random intensity ratio in {211} <011> orientation that is parallel to a rolled surface and a rolling direction is less than or equal to 2.5.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: February 27, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Takeshi Toyoda, Takehiro Takahashi, Takeshi Imai, Takeshi Yamamoto
  • Patent number: 9896752
    Abstract: Disclosed is an austenitic stainless steel alloy that includes, by weight, about 22% to about 28% chromium, about 3.5% to about 6.5% nickel, about 1% to about 6% manganese, about 0.5% to about 2.5% silicon, about 0.5% to about 1.5% tungsten, about 0.2% to about 0.8% molybdenum, about 0.2% to about 0.8% niobium, about 0.3% to about 0.6% carbon, about 0.2% to about 0.8% nitrogen, and a balance of iron. The alloy is suitable for use in turbocharger turbine housing applications for temperature up to about 1020° C.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: February 20, 2018
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Pavan Chintalapati, Marc Wilson, Rayad Benchiheub, Philippe Renaud, Gary Agnew, Nicolas Devulder
  • Patent number: 9899895
    Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: February 20, 2018
    Assignee: Saint Augustin Canada Electric Inc.
    Inventor: Cheruvari Karthik Hari Dharan