Nine Percent Or More Chromium Containing Patents (Class 148/325)
  • Patent number: 11459659
    Abstract: A nanocrystalline material based on a stainless steel surface. In percentage by weight, the nanocrystalline material comprises: 0 to 3% of carbon, 20% to 35% of oxygen, 40% to 53% of chromium, 10% to 35% of ferrum, 0 to 4% of molybdenum, 1% to 4% of nickel, 0 to 2.5% of silicon, 0 to 2% of calcium, and the balance of impurity elements. Also disclosed is a preparation method for the nanocrystalline material, and the nanocrystalline material that is based on a stainless steel surface and that is prepared by using the preparation method.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: October 4, 2022
    Assignee: SHENZHEN CANDORTECH INCORPORATED COMPANY
    Inventor: Chao Chen
  • Patent number: 11414719
    Abstract: A high strength stainless steel seamless pipe for oil country tubular goods which is excellent in hot workability, has a high strength, suppresses scattering in the strength, and has excellent carbon dioxide corrosion resistance. The steel pipe has a yield strength of 655 MPa or more, and a chemical composition comprising, by mass %, C: 0.005 to 0.05%, Si: 0.05 to 0.50%, Mn: 0.20 to 1.80%, P: 0.030% or less, S: 0.005% or less, Cr: 12.0 to 17.0%, Ni: 4.0 to 7.0%, Mo: 0.5 to 3.0%, Al: 0.005 to 0.10%, V: 0.005 to 0.20%, Co: 0.01 to 1.0%, N: 0.005 to 0.15%, and O: 0.010% or less with the balance being Fe and inevitable impurities. Cr, Ni, Mo, Cu, and C satisfy a specified expression, and Cr, Mo, Si, C, Mn, Ni, Cu, and N satisfy another specified expression.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: August 16, 2022
    Assignee: JFE Steel Corporation
    Inventors: Kenichiro Eguchi, Yasuhide Ishiguro
  • Patent number: 11401566
    Abstract: A stainless steel with high strength and high toughness and processing method thereof are disclosed in the present invention. The stainless steel comprising: C of 0.01%˜0.1% weight percentage, N of 0.05%˜0.2%, P of no higher than 0.03%, S of no higher than 0.003%, Si of 0.5%˜1%, Mn of 1.0%˜2.0%, Cr of 15%˜17%, Ni of 5% to 7%, and Fe. The stainless steel contains austenite and strain-induced martensite structure, wherein the martensite is of irregular approximately spindle body shape, and the average size of its long axis ranges from 50 to 1000 nm and that of its short axis ranges from 20 to 500 nm, the volume percent of martensite in the stainless steel is 0.1% to 20%.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: August 2, 2022
    Assignee: Zhejiang University
    Inventors: Jiabin Liu, Hongtao Wang, Youtong Fang
  • Patent number: 11365467
    Abstract: Provided is a ferritic stainless steel having excellent brazability and excellent corrosion resistance to condensed water in an environment in which the ferritic stainless steel is used for an exhaust heat recovery device or an EGR cooler. The ferritic stainless steel has a composition containing, in mass %, C: 0.025% or less, Si: 0.01% or more and less than 0.40%, Mn: 0.05 to 1.5%, P: 0.05% or less, S: 0.01% or less, Cr: 17.0 to 30.0%, Mo: 1.10 to 3.0%, Ni: more than 0.80% and 3.0% or less, Nb: 0.20 to 0.80%, Al: 0.001 to 0.10%, and N: 0.025% or less, with the balance being Fe and incidental impurities, and satisfying the following expression (1) and expression (2): C+N?0.030%??(1) Cr+Mo?19.0%??(2) where C, N, Cr, and Mo in expression (1) and expression (2) represent the contents (mass %) of the corresponding elements.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: June 21, 2022
    Assignee: JFE STEEL CORPORATION
    Inventors: Manami Ichikawa, Tetsuyuki Nakamura, Kunio Fukuda, Shin Ishikawa, Reiko Sugihara
  • Patent number: 11352678
    Abstract: A method for partial hardening of an austenitic steel by utilizing during cold deformation the TWIP (Twinning Induced Plasticity), TWIP/TRIP or TRIP (Transformation Induced Plasticity) hardening effect. Cold deformation is carried out by cold rolling at least one surface of the steel with forming degree (?) of 5???60% in order to achieve in the steel at least two consecutive areas with different mechanical values in thickness, yield strength (Rp0.2), tensile strength (Rm) and elongation, having a ratio (r) between the ultimate load ratio (?F) and the thickness ratio (?t) of 1.0>r>2.0, and in which the areas are mechanically connected to each other by a transition area having a thickness that is variable from the thickness of the first area in the deformation direction to the thickness of the second area in the deformation direction.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: June 7, 2022
    Assignee: Outokumpu Oyj
    Inventors: Thomas Fröhlich, Stefan Lindner, Thorsten Piniek
  • Patent number: 11306410
    Abstract: An anti-coking nanomaterial based on a stainless steel surface. In percentage by weight, the nanomaterial comprises: 0 to 3% of carbon, 23% to 38% of oxygen, 38% to 53% of chromium, 10% to 35% of ferrum, 0 to 2% of molybdenum, 0 to 4% of nickel, 3.5 to 5% of silicon, 0 to 1% of calcium, and the balance of impurity elements. Also disclosed are a preparation method for the anti-coking nanomaterial, the anti-coking nanomaterial that is based on a stainless steel surface and that is prepared by using the preparation method, and a stainless steel substrate comprising the anti-coking nanocrystalline material.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: April 19, 2022
    Assignee: SHENZHEN CANDORTECH INCORPORATED COMPANY
    Inventor: Chao Chen
  • Patent number: 11261512
    Abstract: Provided is ferritic stainless steel having excellent brazeability and excellent corrosion resistance to condensed water in an environment in which the steel is used for an exhaust heat recovery device or an EGR cooler. A ferritic stainless steel has a chemical composition containing, by mass %, C: 0.025% or less, Si: 0.40% to 2.0%, Mn: 0.05% to 1.5%, P: 0.05% or less, S: 0.01% or less, Cr: 16.0% to 30.0%, Mo: 0.60% to 3.0%, Ni: 0.10% to 2.5%, Nb: 0.20% to 0.80%, Al: 0.001% to 0.15%, N: 0.025% or less, and the balance being Fe and inevitable impurities, in which relational expressions (1) and (2) below are satisfied. C+N?0.030%??(1), 2Si+Ni?1.0%??(2), (in relational expressions (1) and (2), C, N, Si, and Ni each denote the contents (mass %) of the corresponding elements).
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: March 1, 2022
    Assignee: JFE Steel Corporation
    Inventors: Manami Ichikawa, Tetsuyuki Nakamura, Kunio Fukuda, Shin Ishikawa, Reiko Sugihara
  • Patent number: 11242584
    Abstract: The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy), which is suitable for use in a plant for the production of urea and uses thereof. The disclosure also relates to objects made of the duplex stainless steel. Furthermore, the present disclosure relates to a method for the production of urea and to a plant for the production of urea having one or more parts made from the duplex stainless steel, and to a method of modifying an existing plant for the production of urea.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: February 8, 2022
    Assignee: Sandvik Intellectual Property AB
    Inventors: Daniel Gullberg, Christina Haraldsson, Anders Wilson, Alexander Scheerder, Kirk Ofei
  • Patent number: 11230743
    Abstract: The present invention relates to a method for manufacturing a tubular product, characterized in that the tubular product is manufactured from steel comprising chromium in the range of 2.5 to 9.5 wt. % and silicon in an amount of more than 1.0 wt. %, and the method comprises the steps of austenitizing, quenching and tempering at a tempering temperature in the range of 300° C. to 550° C. Furthermore, the invention concerns a tubular product produced by this method.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: January 25, 2022
    Assignee: Benteler Steel/Tube GmbH
    Inventors: Michael Kaufmann, Marco Walterfang, Ralf Köster
  • Patent number: 11225705
    Abstract: This austenitic stainless steel contains, by mass %: C: 0.3% or less, Si: 0.1% to 1.5%, Mn: 5.5% to 20%, P: 0.050% or less, S: 0.005% or less, Cr: 10% to 20%, Ni: 4.0% to 12%, N: 0.40% or less, Cu: 4.0% or less, O: 0.02% or less, and either one or both of Ca: 0.01% or less and Al: 0.3% or less, with a remainder being Fe and inevitable impurities, and the following Formula (1) is satisfied. [Ni]+[Cu]+12.93[C]+1.11[Mn]+0.72[Cr]+0.88[Mo]?0.27[Si]+7.55[N]?29.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: January 18, 2022
    Assignee: NIPPON STEEL STAINLESS STEEL CORPORATION
    Inventors: Kazuhisa Matsumoto, Masaharu Hatano, Jun Nakamura
  • Patent number: 11193179
    Abstract: A method of manufacturing a seamless stainless steel pipe for Oil Country Tubular Goods by heating a billet having a specified chemical composition including forming the billet into a seamless steel pipe by applying hot working to the billet, cooling the seamless steel pipe to a room temperature at a cooling rate of air cooling or more, thereafter, performing quenching by heating the seamless steel pipe to a temperature of 850° C. or above, subsequently, cooling the seamless steel pipe to a temperature of 100° C. or below at a cooling rate of air cooling or more, and subsequently, applying tempering to the seamless steel pipe at a temperature of 700° C. or below for a specific holding time.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: December 7, 2021
    Assignee: JFE STEEL CORPORATION
    Inventors: Kazuki Fujimura, Yasuhide Ishiguro, Seigo Goto
  • Patent number: 11162454
    Abstract: An upper member of a steel piston has a chemical composition which consists of, in mass %, C: 0.15 to 0.30%, Si: 0.02 to 1.00%, Mn: 0.20 to 0.80%, P: 0.020% or less, S: 0.028% or less, Cr: 0.80 to 1.50%, Mo: 0.08 to 0.40%, V: 0.10 to 0.40%, Al: 0.005 to 0.060%, N: 0.0150% or less, O: 0.0030% or less, and the balance: Fe and impurities, and satisfies Formula (1) and Formula (2), in which, at a cross section parallel to the axial direction of the upper member, the number of Mn sulfides is 100.0 per mm2 or less, the number of coarse Mn sulfides having an equivalent circular diameter of 3.0 ?m or more is within a range of 1.0 to 10.0 per mm2, and the number of oxides is 15.0 per mm2 or less. 0.42?Mo+3V?1.50??(1) V/Mo?0.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: November 2, 2021
    Assignees: NIPPON STEEL CORPORATION, ISUZU MOTORS LIMITED
    Inventors: Yutaka Neishi, Yorimasa Tsubota, Kouji Oosato, Hirohito Eto, Wataru Nagai, Yoshitomi Yamada
  • Patent number: 11155900
    Abstract: A nickel-titanium alloy is made to be wholly or substantially free of titanium-rich oxide inclusions by including yttrium in an amount up to 0.15 wt. %, with the balance of the alloy being nickel and titanium in approximately equal proportion. For example, a NiTiY alloy may have a composition including, in weight percent based on total alloy weight: between 50 and 60 wt. % nickel; between 40 and 50 wt. % titanium; and between 0.01 and 0.15 wt. % yttrium. The resulting alloy is capable of being drawn into various forms, e.g., fine medical-grade wire, without exhibiting an unacceptable tendency to develop surface defects or to fracture or crack during cold drawing or forging. The resulting final forms exhibit favorable fatigue strength and fatigue-resistant characteristics.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: October 26, 2021
    Assignee: Fort Wayne Metals Research Products Corp.
    Inventors: Song Cai, Jeremy E. Schaffer, Adam J. Griebel
  • Patent number: 11116419
    Abstract: Devices, systems, and methods are described including an invasive medical device with a magnetic region. The magnetic region can include a discontinuity in the magnetic region providing a diameter transition, a plurality of spaced magnetic regions can be provided or the magnetic regions can be encoded with data. Systems and methods are described that include ways to read the data.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: September 14, 2021
    Assignee: Becton, Dickinson and Company
    Inventors: S. Ray Isaacson, Siddarth Shevgoor, Jonathan Karl Burkholz, Laurie Sanders
  • Patent number: 11098387
    Abstract: The present disclosure relates to a duplex stainless steels strip manufactured from a duplex stainless steel, wherein the duplex stainless steel comprises the following composition, in weight %: C less than or equal to 0.02; Si 0.05 to 0.40; Mn 0.5-3.0; Cr 30.0 to 33.0; Ni 5.0-10.0; Mo 2.0-4.0; N 0.40-0.60; Al 0.010-0.035; B 0.0020-0.0030; Ca 0.0006-0.0040; 5 Cu 0-0.60; V0-0.15; W 0-0.05; Co 0-0.60; Ti 0-0.03; Nb 0-0.03; P less than or equal to 0.03; S less than or equal to 0.02; balance Fe and unavoidable impurities; and wherein the duplex stainless steel consists of 30-70 vol % austenite phase and 70-30 vol % ferrite phase; and wherein the strip has alternating layers of ferrite phase and austenite phase, said alternating layers are essentially parallel with the plane of the object and said alternating 10 layers have an average layer thickness less than or equal to about 10 ?m. The present disclosure also relates to a method of producing a strip comprising said duplex stainless steel.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: August 24, 2021
    Assignee: AB Sandvik Materials Technology
    Inventors: Sara Wiklund, Tomas Forsman
  • Patent number: 11090719
    Abstract: A powder metal compact is disclosed. The powder metal compact includes a cellular nanomatrix comprising a nanomatrix material. The powder metal compact also includes a plurality of dispersed particles comprising a particle core material that comprises an Al—Cu—Mg, Al—Mn, Al—Si, Al—Mg, Al—Mg—Si, Al—Zn, Al—Zn—Cu, Al—Zn—Mg, Al—Zn—Cr, Al—Zn—Zr, or Al—Sn—Li alloy, or a combination thereof, dispersed in the cellular nanomatrix.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: August 17, 2021
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventor: Zhiyue Xu
  • Patent number: 11066719
    Abstract: A duplex stainless steel with good low-temperature toughness is provided. The duplex stainless steel has a chemical composition of, in mass %: up to 0.03% C; 0.1 to 0.8% Si; up to 2.3% Mn; up to 0.040% P; up to 0.010% S; up to 0.040% sol. Al; 3 to 7% Ni; 20 to 28% Cr; 0.5 to 2.0% Mo; more than 2.0% and not more than 4.0% Cu; 0.02 to 0.5% Co; 0.1 to 0.35% N; up to 0.010% O; and other elements, the steel having a microstructure including an austenite phase and a ferrite phase, the ferrite phase having an area percentage of 30 to 60%, the steel satisfying the following Formula, (1); 0.70×NiL?NiH??(1), where NiH and NiL are obtained by using an electron-beam microanalyzer to measure Ni content and, in a distribution of Ni content, determining two maximum frequencies, and treating the one with a higher Ni content as NiH and treating the one with a lower Ni content as NiL.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: July 20, 2021
    Assignee: Nippon Steel Corporation
    Inventors: Daisuke Motoya, Masayuki Sagara, Hidenori Shitamoto
  • Patent number: 11047028
    Abstract: The present disclosure relates to a drill component having a martensitic stainless steel which has good corrosion resistance in combination with optimized and well-balanced mechanical properties, such as high hardness, resistance against wear and abrasion, high tensile strength and high impact toughness.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: June 29, 2021
    Assignee: Sandvik Intellectual Property AB
    Inventors: Anna Wennberg, Tomas Antonsson, Lars Nylof
  • Patent number: 10995384
    Abstract: There is provided a steel for solid oxide fuel cells which contains more than 0 and not more than 0.05 mass % of C, 0.05 mass % or less of N, 0.01 mass % or less of O, 0.2 mass % or less of Al, 0.15 mass % or less of Si, 0.1 to 1.0 mass % of Mn, 20.0 to 25.0 mass % of Cr, more than 0 mass % and not more than 1.0 mass % of Ni, 0.02 to 0.12 mass % of La, 0.1 to 0.5 mass % of Zr, 0.15 to 0.5 mass % of La+Zr, and Fe and impurities as a remainder. The following relational formula is satisfied, and an Fe and Zr-containing intermetallic compound viewed in a ferrite matrix is 1.1 % or less in terms of a visual field area ratio 5(7C+6N)/(7?4(7C+6N))?Zr?41(7C+6N)/(7+66(7C+6N)).
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: May 4, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Kazuhiro Yamamura, Toshihiro Uehara, Shigenori Tanaka
  • Patent number: 10975459
    Abstract: Provided is a ferritic stainless steel excellent in oxidation resistance and thermal fatigue resistance. The ferritic stainless steel contains, in mass %, C: 0.020% or less, Si: more than 0.1% and 3.0% or less, Mn: 0.05 to 2.0%, P: 0.050% or less, S: 0.010% or less, Al: 0.3 to 6.0%, N: 0.020% or less, Cr: 12 to 30%, Nb: more than 0.3% and 1.0% or less, Ti: 0.01 to 0.5%, Mo: 0.3 to 6.0%, Co: 0.01 to 3.0%, and Ni: 0.02 to 1.0%, the balance being Fe and unavoidable impurities. Moreover, Si+Al>1.0%, Al—Mn>0%, and Nb—Ti>0% hold.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: April 13, 2021
    Assignee: JFE Steel Corporation
    Inventors: Tetsuyuki Nakamura, Shin Ishikawa, Chikara Kami
  • Patent number: 10975718
    Abstract: Disclosed is an austenitic stainless steel alloy that includes, by weight, about 16% to about 21% chromium, about 4.5% to about 5.5% nickel, about 2% to about 5% manganese, about 1% to about 2% silicon, about 0.8% to about 1.2% tungsten, about 0.4% to about 0.8% molybdenum, about 0.4% to about 0.6% niobium, about 0.4% to about 0.5% carbon, 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: February 12, 2013
    Date of Patent: April 13, 2021
    Assignee: GARRETT TRANSPORTATION I INC
    Inventors: Pavan Chintalapati, Balasubramani Nandagopal, Praveen Guruprasanna, Marc Wilson, Vijaymahantesh Patil, Jean-Jacques Laissus
  • Patent number: 10941469
    Abstract: The present disclosure relates to a martensitic stainless steel suitable for rock drill steel rods. Furthermore, the present disclosure also relates to the use of the martensitic stainless steel and to products manufactured thereof, especially drill rods.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: March 9, 2021
    Assignee: AB Sandvik Materials Technology
    Inventors: Anna Wennberg, Tomas Antonsson, Lars Nylof
  • Patent number: 10870900
    Abstract: A reciprocating pump is disclosed. The reciprocating pump may comprise a power end, and a fluid end operatively connected to the power end. The fluid end may include a plunger, a cylinder configured to operatively engage the plunger, and an end block. The plunger, the cylinder, and the end block of the fluid end may each be fabricated from a high toughness martensitic stainless steel composition comprising between 11.50% and 17.00% by weight chromium, between 3.50% and 6.00% by weight nickel, between 0.30% and 1.50% by weight molybdenum, between 0.01% and 0.20% by weight vanadium, and iron.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: December 22, 2020
    Assignee: A. Finkl & Sons Co.
    Inventors: Algirdas Underys, Louis-Philippe Lapierre
  • Patent number: 10833335
    Abstract: The present disclosure provides a stainless steel substrate used for a fuel cell separator that comprises Nb and is excellent in corrosion resistance. The embodiments relate to a stainless steel substrate used for a fuel cell separator, comprising Nb in a solid solution state, and comprising substantially no precipitate of a Nb-containing intermetallic compound.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: November 10, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takashi Aisaka, Takashi Kono
  • Patent number: 10816421
    Abstract: An object of the present invention is to provide a metal elastic element which is suitable for sensing or the like of a fluid pressure change and exhibits favorable resilience even in the case of receiving a sudden pressure change, and also provide a diaphragm using the same. A metal elastic element of the present invention is composed of a two-phase stainless steel having a ?-phase and an ?-phase, wherein the area ratio of the ?-phase is 40% or less, and the two-phase structure is a marble-like metal structure. In the invention, it is preferred that the element has a fiber texture in which <111>? and <110>? are preferentially oriented parallel to the thickness direction.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: October 27, 2020
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takuma Otomo, Yasunori Akasaka, Ryo Sugawara, Tomoo Kobayashi
  • Patent number: 10707472
    Abstract: A multiple layer metallic laminate having more desirable electrical properties as compared to known embodiments includes multiple layers of metallic sheets clad together. The multiple layer laminate composite includes at least a first metallic layer having good soldering properties, such as commercially available nickel or nickel alloys, a second metallic layer having good resistance welding properties, such as commercial available steels or stainless steels, a third metallic layer having low electrical resistivity properties, such as commercially available copper and copper alloys, a fourth metallic layer have good resistance welding properties, such as commercially available steels or stainless steels, and a fifth metallic layer having good soldering properties, such as commercially available nickel or nickel alloys.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: July 7, 2020
    Assignee: EMS Engineered Materials Solutions, LLC
    Inventors: Michael D. Hardy, Michael Haynes
  • Patent number: 10689723
    Abstract: The present invention relates to a ferritic stainless steel according to the present invention, containing, in mass %: 0.001%?C?0.020%, 0.05%?Si?0.50%, 0.1%?Mn?1.0%, 15.0%?Cr?25.0%, Mo<0.50%, 0.50%?W?5.00%, and 0.01%?Nb?0.50%, with a balance being Fe and unavoidable impurities, having a content (coarse Laves phase ratio) of coarse Laves phase having a diameter of 0.50 ?m or more being 0.1% or less, and having an average grain size being 30 ?m or more and 200 ?m or less.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: June 23, 2020
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Yoshihiko Koyanagi, Hiroyuki Takabayashi
  • Patent number: 10633730
    Abstract: Provided is a material for a cold-rolled stainless steel sheet having a chemical composition containing, by mass %, C: 0.01% to 0.05%, Si: 0.02% to 0.75%, Mn: 0.1% to 1.0%, P: 0.04% or less, S: 0.01% or less, Cr: 16.0% to 18.0%, Al: 0.001% to 0.10%, N: 0.01% to 0.06% and the balance being Fe and inevitable impurities. The material has a metallographic structure including a martensite phase having an area ratio of 5% to 50% and the balance being a ferrite phase. A ferrite phase in portions extending from surface layers of front and back surfaces of a steel sheet has an average grain diameter of 20 ?m or more and 50 ?m or less, and a ferrite phase in a central portion of the sheet includes an unrecrystallized ferrite phase.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: April 28, 2020
    Assignee: JFE Steel Corporation
    Inventors: Ayako Ta, Yukihiro Matsubara, Yukio Kimura, Masataka Yoshino, Keisuke Nakazono, Sumio Kaiho, Saiichi Murata, Nobukazu Kitagawa
  • Patent number: 10632521
    Abstract: The production method for producing a rifled tube, which includes a plurality of first helical ribs on its inner surface, includes: a steps of: preparing a steel tube; and producing a rifled tube by performing cold drawing on a steel tube by using a plug which includes a plurality of second helical ribs, the plug satisfying Formulae and: 0.08 <W×(A?B)×N/(2?×A)<0.26??(1) 0.83<S×(A?B)×N/(2×M)<2.0??(2) where, W is a width of a groove bottom surface of the helical groove; A is a maximum diameter of the plug; B is a minimum diameter of the plug; N is a number of the second helical ribs; S is the width of the groove bottom surface; and M is a pitch of adjacent second helical ribs.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: April 28, 2020
    Assignees: NIPPON STEEL CORPORATION, MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Takashi Nakashima, Atsuro Iseda, Takeshi Miki, Shunichi Otsuka
  • Patent number: 10633726
    Abstract: A low alloy high nitrogen steel includes iron and, by weight 0.14-0.60% nitrogen (N); 0.08-0.28% carbon (C); 0.10-2.20% nickel (Ni); 0.25-2.00% manganese (Mn); 1.20-2.70% chromium (Cr); 0.45-1.50% tungsten (W); not more than 0.05% molybdenum (Mo); not more than 0.02% vanadium (V); not more than 0.60% silicon (Si); not more than 0.10% copper (Cu); not more than 0.02% titanium (Ti); not more than 0.02% niobium (Nb); not more than 0.008% aluminum (Al); and not more than 0.02% of any other element with not more than 0.10% total other elements, wherein cobalt (Co) is substitutable for any part of the nickel.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: April 28, 2020
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: John F. Chinella
  • Patent number: 10626486
    Abstract: Stainless steel that has excellent formability and ridging resistance and can be produced with high productivity is provided. The stainless steel comprises: a chemical composition containing, in mass %, C: 0.005% to 0.050%, Si: 0.01% to 1.00%, Mn: 0.01% to 1.0%, P: 0.040% or less, S: 0.010% or less, Cr: 15.5% to 18.0%, Ni: 0.01% to 1.0%, Al: 0.001% to 0.10%, and N: 0.005% to 0.06%, with a balance being Fe and incidental impurities; and a microstructure containing a martensite phase of 1% to 10% in volume fraction with respect to a whole volume of the microstructure.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: April 21, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Akito Mizutani, Masataka Yoshino, Mitsuyuki Fujisawa, Ayako Ta
  • Patent number: 10590508
    Abstract: A method for manufacturing a shaft body by welding a plurality of shaft members together and forming the shaft body, the method including: a primary tempering step of subjecting a range in at least one of the shaft members, which is in the vicinity of an end of another shaft member side adjacent thereto, to tempering before the shaft members are welded together so that a strength of an end side of a region thereof is lower than a strength at a side which is opposite to the end of the region thereof; a welding step of welding the shaft members together after the primary tempering step; and a secondary tempering step of tempering the vicinity of a weld part between the shaft members after the welding step.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: March 17, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yuichi Hirakawa, Hiroaki Fukushima, Shin Nishimoto, Hiroyuki Endo
  • Patent number: 10577672
    Abstract: A method for cost effectively case hardening a component formed from a martensitic stainless steel material with a desired metallurgical condition for high temperature, high rolling contact fatigue, corrosion and spall initiation and propagation resistance bearing performance. The method describes a method to significantly reduce the carburization or carbo-nitriding process times for appreciable reduction in manufacturing cost. The Method includes the steps of: forming the component from a martensitic stainless steel material having an ASTM grain size of 9 or finer; and subjecting the component to one of a carburization and a carbo-nitriding treatment with significantly lower case hardening times for manufacturing cost-effectiveness.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: March 3, 2020
    Assignee: United Technologies Corporation
    Inventors: Herbert A. Chin, David A. Haluck, William P. Ogden, Michael A. Moulin
  • Patent number: 10570979
    Abstract: A ferritic stainless steel material excellent in vibration damping capability has a composition containing, by mass %, from 0.001 to 0.04% of C, from 0.1 to 2.0% of Si, from 0.1 to 1.0% of Mn, from 0.01 to 0.6% of Ni, from 10.5 to 20.0% of Cr, from 0.5 to 5.0% of Al, from 0.001 to 0.03% of N, from 0 to 0.8% of Nb, from 0 to 0.5% of Ti, from 0 to 0.3% of Cu, from 0 to 0.3% of Mo, from 0 to 0.3% of V, from 0 to 0.3% of Zr, from 0 to 0.6% of Co, from 0 to 0.1% of REM, from 0 to 0.1% of Ca, the balance of Fe and unavoidable impurities, and has ferrite single phase matrix with crystal grains of average crystal grain diameter of from 0.3 to 3.0 mm and a residual magnetic flux density of 45 mT or less.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: February 25, 2020
    Assignee: NIPPON STEEL NISSHIN CO., LTD.
    Inventors: Yoshiaki Hori, Kazunari Imakawa, Satoshi Suzuki
  • Patent number: 10557388
    Abstract: The present invention relates to an exhaust valve of a diesel engine for a large ship, containing a shall part and an umbrella part that are integrated with each other and made of an Ni—Cr—Al system Ni-base age-precipitated alloy, in which the exhaust valve has a layered structure and hardness of 600 HV or less as a whole, and the layered structure contains a layer formed of an ?-Cr phase having a thickness of 150 nm or more that is aged beyond peak mechanical strength.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: February 11, 2020
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Shuhei Kawaguchi, Koichi Uno, Mototsugu Osaki
  • Patent number: 10549380
    Abstract: A method for bonding stainless steel members includes: contacting a first stainless steel member with a second stainless steel member that has a strain exceeding 50% reduction; and heating the first and second stainless steel members to a re-crystallization initiation temperature or higher, after the contacting.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: February 4, 2020
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, KOMATSUSEIKI KOSAKUSHO CO., LTD.
    Inventors: Masahito Katoh, Tomomi Shiratori
  • Patent number: 10544490
    Abstract: A ferritic stainless steel for a fuel cell includes, in mass %, Cr: 11 to 25%, C: 0.03% or less, Si: 2% or less, Mn: 2% or less, Al: 0.5 to 4.0%, P: 0.05% or less, S: 0.01% or less, N: 0.03% or less, Ti: 1% or less, and a balance composed of Fe and unavoidable impurities. Furthermore, in the ferritic stainless steel, the maximal concentration of Al in a surface of the ferritic stainless steel is 30 mass % or more in cation ion fraction excepting O in an depth direction region having twice a thickness of an oxide film having less than 0.1 ?m.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: January 28, 2020
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Masaharu Hatano, Atsutaka Hayashi, Kazuhisa Matsumoto
  • Patent number: 10532395
    Abstract: The invention relates to a method for producing a shaped sheet-metal part from a panel or a semifinished part made of a material consisting of steel with at least 60 wt. % Fe and a residual austenite content of at least 5%, in which the panel or the semifinished part is at least partially cooled to a temperature below ?20° C. before the shaping and is shaped at a temperature below ?20° C. in a forming tool. The object of providing a method for producing load-compliantly configured components, which on the one hand permits industrial-scale use of low-temperature forming and is configured particularly simply, is achieved by reducing the material temperature of the panel or semifinished part to below ?20° C. is carried out in a thermally regulated cooling apparatus.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: January 14, 2020
    Assignees: ThyssenKrupp Steel Europe AG, Outokumpu Nirosta GmbH
    Inventors: Axel Grüneklee, Markus Zörnack, Thomas Heller, Ekaterina Bocharova, Seyed Amin Mousavi Rizi
  • Patent number: 10521536
    Abstract: A method or apparatus comprising a verification system using a processor to utilize a first set of verification engines to solve easy properties of an integrated circuit design, such as RTL, running a machine-learning algorithm for a hardness ranking analysis on a plurality of properties based on data from the first set of verification engines, and ranking the plurality of properties by a hardness of verification. The method or apparatus further to order the plurality of properties based on the hardness of verification.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: December 31, 2019
    Assignee: Synopsys, Inc.
    Inventors: Jinqing Yu, Manish Pandey, Ming-Ying Chung, Arunava Saha
  • Patent number: 10501831
    Abstract: The invention relates to a microstructure of an alloy for a tube for reformers, having an austenitic matrix structure, characterised in that: i) primary micrometric precipitates in the form of M23C6-type carbides, where M=Fe, Ni or Cr, and/or M(C,N)-type carbides, where M==Nb or Ti, are formed during the solidification of the alloy; ii) secondary nanometric precipitates in the form of M23C6-type carbides, where M=Fe, Ni or Cr and/or M(C,N)-type carbides, where M==Nb or Ti, are formed during the activation of the tube; and iii) between 0.1 and 0.3% of Ni16Si7Nb6-type intermetallic precipitates is formed during the use of the tube.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: December 10, 2019
    Assignee: L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude
    Inventors: Anna Fraczkiewicz, Karolina Maminska, Pascal Del-Gallo, Jader Furtado, Daniel Gary
  • Patent number: 10494692
    Abstract: A martensitic stainless steel containing, by mass %, C: 0.20% to 0.40%, N: 0.1% or less, Mo: 3% or less, and Cr: 12.0% to 16.0%, such that 0.3%?C+N?0.4% and a PI value (=Cr+3.3Mo+16N) is 18 or more, with the remainder being substantially Fe and unavoidable impurities is quenched from a temperature of 1,030° C. to 1,140° C. and subjected to a subzero treatment and tempering so as to obtain a prior austenite crystal grain size of a surface layer of 30 ?m to 100 ?m and a surface hardness of 58 HRc to 62 HRc.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: December 3, 2019
    Assignee: NSK LTD.
    Inventors: Chikara Matsuzawa, Takafumi Yasuhara, Hiroshi Nishizawa, Norihiro Aoki, Koji Takano, Masaru Kuge
  • Patent number: 10458482
    Abstract: It has been found that metal parts having rough surfaces can be manufactured by (1) compacting a metal powder under high pressure in a mold to make a green part, wherein at least one face of the mold is roughened by electrical discharge machining to have an Ra of 10 to 200 micro-inches, as measured with a profilometer having a stylus tip, (2) heating the green metal part to a temperature of at least 1500° F. to sinter the green metal part to produce the metal part having at least one rough surface, wherein the rough surface has an Ra which is within the range of 10 to 200 micro-inches, as measured with a profilometer having a chisel tip, and (3) optionally, buffing, classifying, deburring and/or washing the metal part. This method can be beneficially used in manufacturing clutch plates, pressure plates, and cam shaft sprockets.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: October 29, 2019
    Assignee: Keystone Powdered Metal Company
    Inventors: Matthew G. Herbstritt, Gary L. Anderson
  • Patent number: 10449629
    Abstract: A method for bonding stainless steel members includes: contacting a first stainless steel member with a second stainless steel member that has a strain exceeding 50% reduction; and heating the first and second stainless steel members to a re-crystallization initiation temperature or higher, after the contacting.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: October 22, 2019
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, KOMATSUSEIKI KOSAKUSHO CO., LTD.
    Inventors: Masahito Katoh, Tomomi Shiratori
  • Patent number: 10407759
    Abstract: A corrosion-resistant, hot and cold formable and weldable steel for use in hydrogen-induced technology with high resistance to hydrogen embrittlement has the following composition: 0.01 to 0.4 percent by mass of carbon, ?3.0 percent by mass of silicon, 0.3 to 30 percent by mass of manganese, 10.5 to 30 percent by mass of chromium, 4 to 12.5 percent by mass of nickel, ?1.0 percent by mass of molybdenum, ?0.2 percent by mass of nitrogen, 0.5 to 8.0 percent by mass of aluminum, ?4.0 percent by mass of copper, ?0.1 percent by mass of boron, ?1.0 percent by mass of tungsten, ?5.0 percent by mass of cobalt, ?0.5 percent by mass of tantalum, ?2.0 percent by mass of at least one of the elements: niobium, titanium, vanadium, hafnium and zirconium, ?0.3 percent by mass of at least one of the elements: yttrium, scandium, lanthanum, cerium and neodymium, the remainder being iron and smelting-related steel companion elements.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: September 10, 2019
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Joerg Naumann, Wolfgang Leistner, Werner Theisen, Sebastian Weber, Thorsten Michler, Mauro Martin
  • Patent number: 10400296
    Abstract: A process of manufacturing a steel alloy for railway components is provided. The process involves providing an alloy comprising, in weight percentage, from 0.21 to 0.27 carbon, from 0.80 to 1.20 manganese, from 0.35 to 0.60 silicon, up to 0.02 phosphorus, up to 0.02 sulfur, from 0.55 to 0.65 chromium, from 0.45 to 0.55 molybdenum, from 1.75 to 2.05 nickel, and from 0.005 to 0.030 titanium; casting the alloy; normalizing the alloy; heat treating the alloy; and tempering the alloy, wherein the tempering occurs at 400-700° C. for 1-5 hours.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: September 3, 2019
    Assignee: Amsted Maxion Fundicao e Equipamentos Ferroviarios S.A.
    Inventor: Carlos Marcelo Belchior
  • Patent number: 10371261
    Abstract: Provided is a martensitic stainless-steel sheet having a reduced anisotropy in workability and fatigue resistance which are attributable to oxide based inclusions. A martensitic stainless-steel sheet which has a steel composition that contains, in terms of mass %, 0.030 to 0.300% C, 0.20 to 2.50% Si, 0.15 to 4.00% Mn, 0.01 to 1.00% Ni, 11.00 to 15.00% Cr, 0.001 to 0.100% N, 0.0001 to 0.0350% Al, 0 to 0.50% V, 0 to 0.50% Nb, 0 to 0.50% Ti, 0 to 0.020% B, and a balance of Fe and unavoidable impurities, and that has a value of ?max, determined by the following equation (1), of 80.0 or greater, and in which oxide based inclusions are observed in the metallographic structure, the oxide based inclusions having a converted composition comprising up to 30 mass % or less Al2O3, 20 to 60 mass % SiO2, and 15 to 70 mass % MnO.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: August 6, 2019
    Assignee: NIPPON STEEL NISSHIN CO., LTD.
    Inventors: Hiroyasu Matsubayashi, Sadayuki Nakamura, Junichi Katsuki, Ryoji Hirota
  • Patent number: 10358707
    Abstract: A Cr-containing ferritic stainless steel sheet is desired with improved corrosion resistance and rust resistance as well as improved ridging resistance. To achieve these results, the ferritic stainless steel sheet derives the relationship between Ap, which shows the ?-phase rate at 1100° C. due to a predetermined ingredient, and Sn in ferritic stainless steel which becomes a dual phase structure of ?+? in the hot rolling temperature region, applies and adds Sn, and hot rolls the steel to give a total rolling rate of 15% or more in 1100° C. or higher hot rolling to thereby obtain ferritic stainless steel sheet which has good ridging resistance, which also has excellent corrosion resistance and rust resistance, and which can be applied to general durable consumer goods, wherein 0.060?Sn?0.634?0.0082Ap and 10?Ap?70.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: July 23, 2019
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Masaharu Hatano, Eiichiro Ishimaru, Akihiko Takahashi, Ken Kimura, Shinichi Teraoka
  • Patent number: 10344758
    Abstract: An end block is disclosed. The end block may include a body extending between a front side, a back side, a left side, a right side, a top side and a bottom side. Furthermore, the body may include a first bore extending through the body between an inlet port and an outlet port and a cylinder bore extending between a cylinder port and the first bore. Moreover, the body may include a precipitation hardened martensitic stainless steel comprising between 0.08% and 0.18% by weight carbon, between 10.50% and 14.00% by weight chromium, between 0.65% and 1.15% by weight nickel, between 0.85% and 1.30% by weight copper, iron, and a first precipitate comprising the copper.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: July 9, 2019
    Assignee: A. FINKL & SONS CO.
    Inventors: Algirdas Underys, Jesse Adamson, Mark Shirley
  • Patent number: 10281903
    Abstract: A process for designing and manufacturing a cavitation erosion resistant component. The process includes selecting a base material for use in a cavitation erosion susceptible environment and conducting a uniaxial loading test on a sample of the selected material. Thereafter, atomic force microscopy (AFM) topography on a surface of the tested sample is conducted and used to provide a surface strain analysis. The process also includes crystal plasticity finite element modeling (CPFEM) of uniaxial loading and CPFEM nanoindentation of the selected material over a range of values for at least one microstructure parameter. A subrange of microstructure parameter values that correlate to CPFEM nanoindentation results that provide increased CE resistance is determined. Finally, a component having an average microstructure parameter value that falls within the subrange of microstructure parameter values is manufactured.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: May 7, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Lili Zheng, Wei Yuan, Harsha Badarinarayan
  • Patent number: 10266908
    Abstract: A rolled steel bar for machine structural use includes a predetermined chemical composition comprising, by mass %, C: 0.45% to 0.65%, Si: higher than 1.00% to 1.50%, Mn: higher than 0.40% to 1.00%, P: 0.005% to 0.050%, S: 0.020% to 0.100%, V: 0.08% to 0.20%, Ti: 0% to 0.050%; Ca: 0% to 0.0030%, Zr: 0% to 0.0030%, Te: 0% to 0.0030%, and a remainder including Fe and impurities, wherein the impurities include: Cr: 0.10% or lower, Al: lower than 0.01%, and N: 0.0060% or lower. In the rolled steel bar for machine structural use, K1 obtained from “K1=C+Si/7+Mn/5+1.54×V” is 0.95 to 1.05, K2 obtained from “K2=139?28.6×Si+105×Mn?833×S?13420×N” is more than 35, a Mn content and a S content satisfy Mn/S?8.0, and a total decarburized depth of a surface layer is 500 ?m or less.
    Type: Grant
    Filed: July 3, 2015
    Date of Patent: April 23, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiromasa Takada, Shinya Teramoto, Osamu Ohyama