Nine Percent Or More Chromium Containing Patents (Class 148/325)
  • 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: 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: 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: 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: 10266909
    Abstract: There is provided an austenitic stainless steel for high-pressure hydrogen gas consisting, by mass percent, of C: 0.10% or less, Si: 1.0% or less, Mn: 3% or more to less than 7%, Cr: 15 to 30%, Ni: 10% or more to less than 17%, Al: 0.10% or less, N: 0.10 to 0.50%, and at least one kind of V: 0.01 to 1.0% and Nb: 0.01 to 0.50%, the balance being Fe and impurities, wherein in the impurities, the P content is 0.050% or less and the S content is 0.050% or less, the tensile strength is 800 MPa or higher, the grain size number (ASTM E112) is No. 8 or higher, and alloy carbo-nitrides having a maximum diameter of 50 to 1000 nm are contained in the number of 0.4/?m2 or larger in cross section observation.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: April 23, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tomohiko Omura, Jun Nakamura, Hirokazu Okada, Hiroyuki Semba, Yusaku Tomio, Hiroyuki Hirata, Masaaki Igarashi, Kazuhiro Ogawa, Masaaki Terunuma
  • 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
  • Patent number: 10260125
    Abstract: There is provided an austenitic stainless steel for high-pressure hydrogen gas consisting, by mass percent, of C: 0.10% or less, Si: 1.0% or less, Mn: 3% or more to less than 7%, Cr: 15 to 30%, Ni: 10% or more to less than 17%, Al: 0.10% or less, N: 0.10 to 0.50%, and at least one kind of V: 0.01 to 1.0% and Nb: 0.01 to 0.50%, the balance being Fe and impurities, wherein in the impurities, the P content is 0.050% or less and the S content is 0.050% or less, the tensile strength is 800 MPa or higher, the grain size number (ASTM E112) is No. 8 or higher, and alloy carbo-nitrides having a maximum diameter of 50 to 1000 nm are contained in the number of 0.4/?m2 or larger in cross section observation.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: April 16, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tomohiko Omura, Jun Nakamura, Hirokazu Okada, Hiroyuki Semba, Yusaku Tomio, Hiroyuki Hirata, Masaaki Igarashi, Kazuhiro Ogawa, Masaaki Terunuma
  • Patent number: 10260123
    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, K3 obtained from “K3=137×C?44.0×Si” is 10.7 or more, a Mn content and a S content satisfy Mn/S?8.0, and a total decarburized depth in a surface layer is 500 ?m or less.
    Type: Grant
    Filed: July 3, 2015
    Date of Patent: April 16, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiromasa Takada, Shinya Teramoto, Osamu Ohyama
  • Patent number: 10246765
    Abstract: A martensitic Cr-containing steel having excellent corrosion resistance, SSC resistance, and IGHIC resistance is provided. A martensitic Cr-containing steel according to the present invention includes: a chemical composition consisting of, by mass %, Si: 0.05 to 1.0%, Mn: 0.1 to 1.0%, Cr: 8 to 12%, V: 0.01 to 1.0%, sol. Al: 0.005 to 0.10%, with the balance being Fe and impurities, wherein an effective Cr amount defined by “Cr?16.6×C” is not less than 8%, and an Mo equivalent defined by “Mo+0.5×W” is 0.03 to 2%; a micro-structure wherein a grain size number of prior-austenite crystal grain is not less than 8.0; and a yield strength of less than 379 to 551 MPa, wherein a grain-boundary segregation ratio of Mo and W is not less than 1.5.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: April 2, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tomohiko Omura, Yusaku Tomio, Hideki Takabe, Toshio Mochizuki
  • Patent number: 10240221
    Abstract: A steel pipe is formed by performing pipe making of a raw material having a composition containing C: 0.05% or less, Si: 0.50% or less, Mn: 0.20% to 1.80%, P: 0.030% or less, S: 0.005% or less, Cr: 14.0% to 18.0%, Ni: 5.0% to 8.0%, Mo: 1.5% to 3.5%, Cu: 0.5% to 3.5%, Al: 0.10% or less, Nb: more than 0.20% and 0.50% or less, V: 0.20% or less, N: 0.15% or less, and O: 0.010% or less, on a percent by mass basis, wherein Cr+0.65Ni+0.6Mo+0.55Cu?20C?18.5 and Cr+Mo+0.3Si?43.3C?0.4Mn?Ni?0.3Cu?9N?11 are satisfied and subjecting the resulting steel pipe to a quenching treatment to heat to a temperature higher than or equal to the Ac3 transformation temperature and, subsequently, cool to a temperature of 100° C. or lower at a cooling rate higher than or equal to the air cooling rate and a tempering treatment to temper at a temperature lower than or equal to the Ac1 transformation temperature.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: March 26, 2019
    Assignee: JFE Steel Corporation
    Inventors: Kenichiro Eguchi, Yasuhide Ishiguro
  • Patent number: 10202675
    Abstract: A stainless steel contains, by mass %, C: 0.005% to 0.03%, Si: 0.05% to 1.0%, Mn: 0.1% to 4.0%, Ni: 3% to 8%, Cr: 20% to 35%, Mo: 0.01% to 4.0%, Al: 0.001% to 0.30%, N: 0.05% to 0.60%, one or more selected from Re: 2.0% or less, Ga: 2.0% or less, and Ge: 2.0% or less, and a balance consisting of Fe and impurities.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: February 12, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masayuki Sagara, Akiko Tomio
  • Patent number: 10174394
    Abstract: An object of the present invention is to provide steel for blades with a significantly improved carbide concentration and a method for producing the same. The steel for blades has a metal composition consisting of, by mass, 0.55% to 0.8% C, not more than 1.0% Si, not more than 1.0% Mn, 12.0% to 14.0% Cr, and the balance of Fe with inevitable impurities, wherein the number of carbides in a ferrite structure of the steel for blades is 600 to 1,000 per an area of 100 ?m2.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: January 8, 2019
    Assignee: Hitachi Metals, Ltd.
    Inventor: Shinichiro Fukada
  • Patent number: 10092982
    Abstract: The present invention provides a fillet welded joint and a method of production of a fillet welded joint which can raise the productivity of the method of production of a fillet welded joint and a fillet welded joint without sacrificing the strength against fatigue fracture of the welded structural member. The fillet welded joint of the present invention is a fillet welded joint formed by fillet welding at least two metal members, wherein, on the surface of at least one of the metal members, the fillet welded joint comprises a press bead of a rib-shaped projection provided by press-forming so as to project upward to the side having a weld bead formed by the fillet welding, and part of the press bead contacts or overlaps the weld bead.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: October 9, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Shinji Kodama, Shoko Oami, Koichi Sato, Yoshiaki Nakazawa
  • Patent number: 10011894
    Abstract: There is provided a precipitation hardening stainless steel powder including, in percentage by mass: Si: ?1.0%; Mn: ?1.8%; Ni: 3.0 to 8.5%; Cr: 12.0 to 20.0%; Mo: 0.1 to 2.5%; Cu: 1.0 to 5.0% and/or Ti+Al: 1.0 to 5.0%; Nb+Ta?5C or Nb?5C; N?350 ppm; and the balance being Fe and incidental impurities. A sintered compact fabricated from the steel powder has a martensite content of 90% or more. The precipitation hardening stainless steel powder provides a sintered compact that exhibits high strength after aging.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: July 3, 2018
    Assignee: Sanyo Special Steel Co., Ltd.
    Inventors: Hiroki Ikeda, Yuichi Nagatomi
  • Patent number: 9978521
    Abstract: A multilayer electronic component includes an element body having an internal electrode layer and a dielectric layer. These layers are substantially parallel to a plane including a first axis and a second axis and are alternately laminated along a third axis direction. A pair of side surfaces facing each other in the first axis direction of the element body is respectively equipped with an insulating layer. A pair of end surfaces facing each other in the second axis direction of the element body is respectively equipped with an external electrode electrically connected to the internal electrode layer. The insulating layer has a mountain portion formed on a peripheral edge of the side surface and a plane portion of a central portion of the side surface.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: May 22, 2018
    Assignee: TDK CORPORATION
    Inventors: Keisuke Okai, Makoto Endo, Hiroshi Shindo, Yui Sugiura, Tomomichi Gunji, Yohei Noda, Hirobumi Tanaka
  • Patent number: 9932852
    Abstract: A sensor assembly is described herein. The sensor assembly includes a housing that includes an inner surface that defines a cavity within the housing, and a proximity sensor positioned within the cavity. The proximity sensor includes a first connector, a second connector, and a substantially planar sensing coil that extends between the first connector and the second connector. The sensing coil extends outwardly from the first connector such that the second connector is radially outwardly from the first connector.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: April 3, 2018
    Assignee: General Electric Company
    Inventors: Dan Tho Lu, Lam Arthur Campbell
  • Patent number: 9931793
    Abstract: An endless-belt shaped heating element is produced by: dispersing annealed stainless-steel fibers in the heat-resistant resin or a precursor thereof; and, producing a molded article of the heat-resistant resin in which the annealed stainless-steel fibers are dispersed.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: April 3, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Izumi Mukoyama, Junji Ujihara
  • Patent number: 9890436
    Abstract: A cold rolled and hardened martensitic austenitic stainless steel strip for flapper valves in compressors is made from steel combining, in weight %(wt. %), the following elements: C: 0.3-0.5, Si: 0.2-0.8, Mn: 0.2-1.0, Cr: 12.0-15.0, Mo: 0.50-2.00, N: 0.02-0.15, and V: 0.01-0.20. The steel strip has a matrix consisting of tempered martensite and between 5 and 15 volume % austenite and a tensile strength (Rm) of 1970-2300 MPa. The steel strip has a thickness of 0.07-3 mm and a width of ?500 mm.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: February 13, 2018
    Assignee: VOESTALPINE PRECISION STRIP AB
    Inventors: Chris Millward, Azhar Nawaz, Alexander Lof
  • Patent number: 9856735
    Abstract: A method of manufacturing a steam turbine rotor which includes an ultra-high temperature side portion in which ultra-high temperature steam flows and a high temperature side portion in which high temperature steam flows, the manufacturing method including the steps of: preparing a first electrode having a chemical composition corresponding to a chemical composition of a heat resistant alloy making up the ultra-high temperature side portion and a second electrode having a chemical composition corresponding to a chemical composition of the high temperature side portion; tentatively joining together joints of the electrodes, with the joints of the electrodes made smaller in cross sectional area than other electrode portions; subjecting the tentatively joined first and second electrodes to an ESR process to obtain an ESR ingot and forging the ingot into a shape of a rotor to obtain a rotor forging; and heat-treating the rotor forging to obtain a rotor blank and manufacturing the steam turbine rotor from the rotor
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: January 2, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masayuki Yamada, Takao Inukai, Kiyoshi Imai, Shigekazu Miyashita, Kuniyoshi Nemoto, Reki Takaku
  • Patent number: 9834832
    Abstract: The present disclosure is directed and formulations and methods to provide alloys having relative high strength and ductility. The alloys may be provided in seamless tubular form and characterized by their particular alloy chemistries and identifiable crystalline grain size morphology. The alloys are such that they include boride pinning phases. In what is termed a Class 1 Steel the alloys indicate tensile strengths of 700 MPa to 1400 MPa and elongations of 10-70%. Class 2 Steel indicates tensile strengths of 800 MPa to 1800 MPa and elongations of 5-65%. Class 3 Steel indicates tensile strengths of 1000 MPa to 2000 MPa and elongations of 0.5-15%.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: December 5, 2017
    Assignee: The NanoSteel Company, Inc.
    Inventors: Daniel James Branagan, Sheng Cheng, Longzhou Ma, Jason K. Walleser, Grant G. Justice, Andrew T. Ball, Kurtis Clark, Scott Larish, Alissa Peterson, Patrick E. Mack, Brian D. Merkle, Brian D. Meacham, Alla V. Sergueeva
  • Patent number: 9816163
    Abstract: A cost effective ferritic stainless steel exhibits improved corrosion resistance comparable to that observed on Type 304L steel. The ferritic stainless steel is substantially nickel-free, dual stabilized with titanium and columbium, and contains chromium, copper, and molybdenum.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: November 14, 2017
    Inventors: Joseph A. Douthett, Shannon K. Craycraft
  • Patent number: 9803257
    Abstract: A stainless steel material having compositions which contain on the basis of percent by mass, C from 0.04 to 0.12%, Ni from 0 (including a case of no addition) to 5.0%, Cr from 12.0 to 17.0%, N from 0.0 to 0.10%, Si from 0.2 to 2.0%, Mn at 2.0% or less, Cu from 0.0 to 2.0%, P at 0.06% or less, S at 0.006% or less, with residue being Fe and unavoidable impurities. Further, a parent phase has any one of a single phase structure of ferrite phase or martensite phase and a diploid phase structure of ferrite phase and martensite phase. An end of the base material is melt-welded as a joint to form a pipe. The parent phase is provided with carbide uniformly separated at grain boundaries and within grains, with a dissolved amount of C being 0.03% by mass or less.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: October 31, 2017
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Seiichi Isozaki, Yasutoshi Hideshima, Hiroshi Fujimoto, Satoshi Suzuki
  • Patent number: 9790565
    Abstract: A hot-rolled stainless steel sheet having excellent hardness and low-temperature impact properties, in which a ferrite is formed with martensite as a matrix structure, is manufactured by a steel manufacturing process, a continuous casting process, and a hot-rolling process. The hot-rolled stainless steel sheet comprises C, N, Si, Mn, Cr, Ni, Ti, Nb, Mo, and the remainder being Fe and other inevitable impurities, wherein C is 0.01 to 0.03 wt %, Cr is 11 to 14 wt %, Ti is 0.1 to 0.2 wt %, and Nb is 0.1 to 0.2 wt %. The ferrite stability (FS) expressed by the following [formula 1] is 5 to 50, and a ferrite is formed with martensite as a matrix structure. [Formula 1] 4 FS=?215?619C?16.6Mn+23.7Cr?36.8Ni+42.2Mo+96.2Ti+67Nb?237N+17.2Si, wherein the numerical value of each component described in [Formula 1] denotes the content (wt %) of each component.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: October 17, 2017
    Assignee: POSCO
    Inventors: Dong Chul Chae, Gyu Jin Jo, Jae Hwa Lee, Kwang Yuk Kim
  • Patent number: 9771641
    Abstract: The invention relates to an austenitic stainless steel with improved pitting corrosion resistance and improved strength. The stainless steel contains in weight % less than 0, % carbon (C), 0,2-0,6% silicon (Si), 1.0-2.0% manganese (Mn), 19.0-21.0% chromium (Cr), 7.5-9.5% nickel (Ni), 0.4-1.4% molybdenum (Mo), less than 1.0% copper (Cu), 0.10-0.25% nitrogen (N), optionally less than 1.0% cobalt (Co), optionally less than 0.006% boron (B), and the rest being iron (Fe) and inevitable impurities.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: September 26, 2017
    Inventor: Janne Koskenniska
  • Patent number: 9763689
    Abstract: This disclosure relates to elongated needle assemblies and methods of their manufacture and use.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: September 19, 2017
    Assignee: Tenex Health, Inc.
    Inventor: Tate Ray Parham
  • Patent number: 9657383
    Abstract: There is provided a heat resistant ferritic steel including a base material including, by mass percent, C: 0.01 to 0.3%, Si: 0.01 to 2%, Mn: 0.01 to 2%, P: at most 0.10%, S: at most 0.03%, Cr: 7.5 to 14.0%, sol.Al: at most 0.3%, and N: 0.005 to 0.15%, the balance being Fe and impurities, and an oxide film that is formed on the base material and contains 25 to 97% of Fe and 3 to 75% of Cr. This heat resistant ferritic steel is excellent in photoselective absorptivity and oxidation resistance.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: May 23, 2017
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yoshitaka Nishiyama, Hiroshi Matsuo, Shunichi Otsuka
  • Patent number: 9657362
    Abstract: In an exhaust gas purification apparatus or other apparatuses that are supplied with ammonia generated from a urea aqueous solution and causes selective reduction and purification of nitride oxides, a shot peening treatment is applied to a welded portion of its exhaust pipe which is made of a ferritic stainless steel plate and through which exhaust gas containing ammonia and hydrogen passes. By shot peening the welded portion of the exhaust pipe, a tensile residual stress in the welded portion of the exhaust pipe can be replaced with a compressive residual stress, and further the diameter of metal crystal grains in the welded portion can be reduced. In this way, the durability of the exhaust pipe can be improved.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: May 23, 2017
    Assignee: UD TRUCKS CORPORATION
    Inventors: Yoshihiko Nozaki, Jouji Hagiwara, Kazuhiro Hirakawa, Norihiro Fujisawa
  • Patent number: 9637813
    Abstract: The present invention relates to duplex ferritic austenitic stainless steel for the use chemical industry for nitric acid environments wherein good uniform corrosion resistance and high strength are required. The microstructure of the stainless steel has 35-65 volume % of ferrite, preferably 45-55 volume % of ferrite, the balance being austenite. The chemical composition contains less than 0.03 weight % carbon, less than 1 weight % silicon, less than 3 weight % manganese, 26-29.5 weight % chromium, 5-8.5 weight % nickel, 1-3 weight % molybdenum, 0.25-0.35 weight % nitrogen, 1-3 weight % copper, the rest being iron and inevitable impurities occurring in stainless steels.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: May 2, 2017
    Assignee: Outokumpu Oyj
    Inventors: Alexander Thulin, Jan Y. Jonsson, Mats Liljas, Rachel Pettersson, Jan-Olof Andersson, Staffan Hertzman
  • Patent number: 9612008
    Abstract: There is provided an austenitic stainless steel tube containing, by mass percent, 14 to 28% of Cr and 6 to 30% of Ni, wherein the steel tube has a metal micro-structure, in which an average dislocation density, which is determined by XRD measurement using a Co tube, is 3.0×1014/m2 or higher, on the inner surface side of the steel tube. The crystal grain size of the steel tube is preferably 50 ?m or smaller. The steel tube of the present invention is suitable as a steel tube used in power-generating plants.
    Type: Grant
    Filed: May 28, 2012
    Date of Patent: April 4, 2017
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yoshitaka Nishiyama, Mitsuharu Yonemura
  • Patent number: 9556503
    Abstract: The disclosure provides a creep resistant alloy having an overall composition comprised of iron, chromium, molybdenum, carbon, manganese, silicon, nickel, vanadium, niobium, nitrogen, tungsten, cobalt, tantalum, boron, copper, and potentially additional elements. In an embodiment, the creep resistant alloy has a molybdenum equivalent Mo(eq) from 1.475 to 1.700 wt. % and a quantity (C+N) from 0.145 to 0.205. The overall composition ameliorates sources of microstructural instability such as coarsening of M23C6carbides and MX precipitates, and mitigates or eliminates Laves and Z-phase formation. A creep resistant martensitic steel may be fabricated by preparing a melt comprised of the overall composition followed by at least austenizing and tempering. The creep resistant alloy exhibits improved high-temperature creep strength in the temperature environment of around 650° C.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: January 31, 2017
    Assignee: U.S. Department of Energy
    Inventors: Jeffrey A. Hawk, Paul D. Jablonski, Christopher J. Cowen