Patents Examined by Deborah Yee
  • Patent number: 10370748
    Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: August 6, 2019
    Assignee: ATI PROPERTIES LLC
    Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
  • Patent number: 10354784
    Abstract: A non-oriented magnetic steel sheet includes a specific chemical composition represented by, in mass %: Si: 3.0% to 3.6%; Al: 0.50% to 1.25%; Mn: 0.5% to 1.5%; Sb or Sn or both of them: [Sb]+[Sn]/2 is 0.0025% to 0.05% where [Sb] denotes an Sb content and [Sn] denotes an Sn content; P: 0.010% to 0.150%; Ni: 0.010% to 0.200%; C: 0.0010% to 0.0040%; and others. The thickness of the non-oriented magnetic steel sheet is 0.15 mm to 0.30 mm. the non-oriented magnetic steel sheet includes magnetic properties represented by, where t denotes a thickness (mm) of the non-oriented magnetic steel sheet: a magnetic flux density B50: “0.2×t+1.52” T or more; a magnetic flux density difference ?B50: 0.08 T or less; core loss W10/50: 0.95 W/kg or less; and core loss W10/400: “20×t+7.5” W/kg or less. A ratio of a number of intergranular carbides precipitated in grains relative to a sum of the number of the intergranular carbides and a number of grain boundary carbides precipitated on grain boundaries is 0.50 or less.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: July 16, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenichi Murakami, Yoshiaki Natori, Takuya Matsumoto, Hiroki Hori, Takeaki Wakisaka
  • Patent number: 10351925
    Abstract: A steel plate excellent in acid dew point corrosion resistance has a composition, in mass percent, from 0.001 to 0.15% of C, 0.80% or less of Si, 1.50% or less of Mn, 0.025% or less of P, 0.030% or less of S, from 0.10 to 1.00% of Cu, 0.50% or less of Ni, from 0.05 to 0.25% of Cr, 0.01 to 0.08% of Mo, 0.100% or less of Al, from 0 to 0.20% in total of Ti, Nb, and V, from 0 to 0.010% of B, from 0 to 0.10% in total of Sb and Sn, and a balance of Fe and unavoidable impurities, having a ferrite single phase structure, or a structure containing 30% by volume or less in total of one or more of cementite, pearlite, bainite, and martensite, with the balance ferrite phase. Ferrite crystal grains have an average crystal grain diameter of 12.0 mm or less.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: July 16, 2019
    Assignee: NIPPON STEEL NISSHIN CO., LTD.
    Inventors: Yukio Katagiri, Akito Kawamoto, Susumu Fujiwara
  • Patent number: 10329633
    Abstract: A high-strength seamless stainless steel pipe for oil country tubular goods that is excellent in terms of hot workability, sulfide stress cracking resistance, and corrosion resistance, and a method for manufacturing the steel pipe. The steel pipe has a chemical composition containing Cr and Ni so that the relationship Cr/Ni?5.3 is satisfied. A microstructure of the steel pipe includes mainly a tempered martensite phase. Additionally, a surface layer microstructure of the steel pipe includes a phase which looks white when subjected to etching with a Vilella etching solution, the phase having a thickness in the wall thickness direction from the outer surface of the pipe of 10 ?m or more and 100 ?m or less and dispersing in the outer surface of the pipe in an amount of 50% or more in terms of area fraction.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: June 25, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Kazuki Fujimura, Yasuhide Ishiguro, Tetsu Nakahashi, Hideo Sato
  • Patent number: 10332662
    Abstract: An apparatus for, and a method of controlling magnetic anisotropy in a magnetic material comprises directing a layer of powdered metal material to a heat conducting substrate. Electromagnetic energy is applied to the powdered material sufficient to melt the powdered material which is subsequently cooled to create a solid layer on the substrate. An external magnetic field is applied to the material during at least the cooling step so as to imprint the solid magnetic material layer with magnetic anisotropy. Various novel magnetic structures can be fabricated using the technique.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: June 25, 2019
    Assignee: EXMET AB
    Inventors: Mattias Unosson, Björgvin Hjörvarsson, Vassilios Kapaklis, Fridrik Magnus
  • Patent number: 10323292
    Abstract: A process for producing a three-dimensionally shaped steel component from a steel sheet with a metallic coating may involve hot forming the steel sheet into the steel component. The metallic coating may involve an Fe—Al-based alloy. To protect the steel sheet or the steel component against scale formation, the Fe—Al-based alloy may be applied directly to the steel sheet by galvanic coating and/or physical vapor deposition. The coating produced in this way may contain 30-60% by weight Fe, a balance of Al, and, in some cases, 0.1-10% by weight Mg, 0.1-5% by weight Ti, 0.1-10% by weight Si, 0.1-10% by weight Li, and/or 0.1-10% by weight Ca. Before heating the coated steel sheet as part of the hot forming process, the coated steel sheet may have an Fe—Al phase is stable to above 900° C.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: June 18, 2019
    Assignees: ThyssenKrupp Steel Europe AG, ThyssenKrupp AG
    Inventors: Bernd Schuhmacher, Christian Schwerdt, Axel Schrooten, Ralf Bause
  • Patent number: 10308998
    Abstract: An armor component produced from a 7xxx series aluminum alloy, wherein the aluminum alloy consists essentially of: 8.4 wt. %?Zn?10.5 wt. %; 1.3 wt. %?Mg?2 wt. %; 1.2 wt. %?Cu?2 wt. %; at least one dispersoid forming element with a total dispersoid forming element content higher than 0.05 wt. %; the remainder substantially aluminum, incidental elements and impurities.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: June 4, 2019
    Assignees: CONSTELLIUM ROLLED PRODUCTS RAVENSWOOD, LLC, CONSTELLIUM VALAIS SA
    Inventors: Jack Franklin, Christophe Jaquerod, Michael Niedzinski
  • Patent number: 10307868
    Abstract: In order to improve the strength and elongation of a solder and improve the reliability of a joining portion joined by the solder, the present invention provides a solder alloy that comprises 2.0 to 4.0 mass % of Ag, 0.5 to 1.0 mass % of Cu, 0.1 to 0.5 mass % of an additive element selected from the group consisting of Ca and Mn, and a balance of Sn.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: June 4, 2019
    Assignee: NEC CORPORATION
    Inventor: Yuuki Momokawa
  • Patent number: 10301702
    Abstract: A can steel plate includes: equal or less than 0.0030% by mass of C; equal or less than 0.02% by mass of Si; 0.05-0.60% by mass of Mn; equal or less than 0.020% by mass of P; equal or less than 0.020% by mass of S; 0.010% to 0.100% by mass of Al; 0.0010-0.0050% by mass of N; 0.001-0.050% by mass of Nb; and balance Fe and impurities. Intensity of (111) [1-21] orientation (where ?2 represents 2 with bar in Miller indices) and intensity of (111)[1-10] orientation (where ?1 represents 1 with bar in Miller indices) satisfy the following equation (1), and in a rolling direction and 90° direction from the rolling direction in a horizontal plane, tensile strength TS (MPa) and fracture elongation El (%) satisfy relations of the following equations (2) and (3). (Intensity of (111) [1-21] orientation)/(Intensity of (111) [1-10] orientation)>0.9 . . . (1), TS>550 . . . (2), El>?0.02×TS+17.5 . . . (3).
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: May 28, 2019
    Assignees: JFE STEEL CORPORATION, THYSSENKRUPP RASSELSTEIN GMBH
    Inventors: Takumi Tanaka, Yusuke Nakagawa, Masaki Tada, Katsumi Kojima, Hiroki Nakamaru, Kathleen Stein-Fechner, Burkhard Kaup
  • Patent number: 10301707
    Abstract: Provided is a steel having excellent weldability and impact toughness in a welding zone comprising: by weight (wt.) %, carbon (C): 0.1% to 0.3%, manganese (Mn): 11% to 13%, iron (Fe) as a residual component thereof, and other inevitable impurities, and positive and negative segregation zones in a layered form. The positive segregation zone comprises austenite and epsilon martensite, and the negative segregation zone comprises, by area fraction, epsilon martensite of less than 5% and alpha martensite.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: May 28, 2019
    Assignee: POSCO
    Inventors: Hak-Cheol Lee, In-Shik Suh, Yong-Jin Kim, In-Gyu Park
  • Patent number: 10294543
    Abstract: A method for producing a grain-oriented electrical steel sheet by subjecting a slab of an inhibitor-less ingredient system containing C: 0.002-0.10 mass %, Si: 2.5-6.0 mass %, Mn: 0.010-0.8 mass % and extremely decreased Al, N, Se and S to hot rolling, hot band annealing, cold rolling, decarburization annealing, application of an annealing separator and finish annealing, when a certain temperature within range of 700-800° C. in a heating process of decarburization annealing is T1 and a certain temperature as a soaking temperature within a range of 820-900° C. is T2, a heating rate R1 between 500° C. and T1 is set to not less than 100° C./s and heating rate R2 between T1 and T2 is set to not more than 15° C./s, whereby grain-oriented electrical steel sheet having excellent iron loss property and coating peeling resistance is obtained in the inhibitor-less ingredient system while ensuring decarburization property even when rapid heating is performed during decarburization annealing.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: May 21, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Ryuichi Suehiro, Takashi Terashima, Makoto Watanabe, Toshito Takamiya, Takeshi Imamura
  • Patent number: 10294544
    Abstract: In a method for producing a grain-oriented electrical steel sheet by subjecting a slab containing C: 0.002-0.10 mass %, Si: 2.5-6.0 mass %, Mn: 0.01-0.8 mass % and further containing Al and N, or S and/or Se, or Al, N, S and/or Se as inhibitor ingredients to hot rolling, hot band annealing, cold rolling, decarburization annealing, application of an annealing separator and finish annealing, when a certain temperature within a range of 700-800° C. in a heating process of the decarburization annealing is T1 and a certain temperature as a soaking temperature within a range of 820-900° C. is T2, a heating rate R1 between 500° C. and T1 is set to not less than 80° C./s and a heating rate R2 between T1 and T2 is set to not more than 15° C./s, whereby a grain-oriented electrical steel sheet having excellent magnetic properties and peeling resistance of forsterite coating is obtained while ensuring decarburization property.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: May 21, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Ryuichi Suehiro, Takashi Terashima, Makoto Watanabe, Toshito Takamiya
  • Patent number: 10294541
    Abstract: Disclosed are a quenched steel sheet and a method for manufacturing the same. The quenched steel sheet according to an aspect of the present invention contains, in terms of wt %, C: 0.05˜0.25%, Si: 0.5% or less (excluding 0), Mn: 0.1˜2.0%, P: 0.05% or less, S: 0.03% or less, the remainder Fe, and other unavoidable impurities, wherein a refined structure of the steel sheet comprises 90 volume % or more of martensite with a first hardness and martensite with a second hardness.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: May 21, 2019
    Assignee: POSCO
    Inventors: Kyong-Su Park, Jae-Hoon Jang
  • Patent number: 10294545
    Abstract: Provided is a carbon tool steel strip suitable for use in various spring materials, valve materials, and the like, in which press punching properties and fatigue characteristics are enhanced. A carbon tool steel strip having a thickness of 1 mm or less and a carbon tool steel composition containing 0.8-1.2% C by mass %, wherein the carbon tool steel strip has a Vickers hardness of 500-650 (Hv), and when a cross-section at the center in the sheet thickness direction of the carbon tool steel strip is viewed with the plane of observation in a direction at a right angle to a rolled surface of the carbon tool steel strip and in the length direction of the carbon tool steel strip, the area ratio of carbides having an equivalent circle diameter of at least 0.5 ?m among the carbides present in the metallographic structure is 0.50-4.30%.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: May 21, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Tomonori Ueno, Hiroyoshi Fujihara, Ichirou Kishigami
  • Patent number: 10280491
    Abstract: Provided is a lean duplex stainless steel used in industrial facilities including fresh water, pulp and paper making, chemical and construction facilities. The lean duplex stainless steel comprises, in weight percentage (%), C: over 0 to 0.06 or less, Si: over 0 to 1.5% or less, Mn: over 0 to 2% or less, Cr: 19 to 23%, Ni: 1.8 to 3.5%, Mo: 0.5 to 1.0%, Cu: 0.3 to 1.0%, N: 0.16 to 0.30%, Al: 0.003 to 0.05%, B: 0.001 to 0.005% and Ca: 0.001 to 0.01%. In the stainless steel, the content of O of the stainless steel is 0.01% or less. The stainless steel comprises Fe and other unavoidable impurities as remnants.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: May 7, 2019
    Assignee: POSCO
    Inventors: Ji Soo Kim, Sang Kon Ahn, Bong Wn Kim, Kwang Tae Kim
  • Patent number: 10273556
    Abstract: The present invention relates to a lightweight steel sheet and a method of manufacturing the same, wherein high strength and ductility can be achieved in the lightweight steel sheet even when a small amount of carbon and manganese is added, by preventing loss of austenite due to decarburizing through inhibiting decarburization, which occurs during a heat treatment step of a steel sheet containing austenite.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: April 30, 2019
    Assignee: POSCO
    Inventors: Jai-Hyun Kwak, Min-Seo Koo, Dong-Seoug Sin
  • Patent number: 10273555
    Abstract: A hot-pressed steel sheet member includes a specific chemical composition and further includes a steel structure in which an area ratio of ferrite in a surface layer portion ranging from a surface to 15 ?m in depth is greater than 1.20 times an area ratio of ferrite in an inner layer portion being a portion excluding the surface layer portion, and the inner layer portion contains a steel structure represented, in area %, ferrite: 10% to 70%, martensite: 30% to 90%, and a total area ratio of ferrite and martensite: 90% to 100%. A tensile strength of the hot-pressed steel sheet member is 980 MPa or more.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: April 30, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventor: Koutarou Hayashi
  • Patent number: 10266928
    Abstract: A cold-rolled steel sheet satisfies that an average pole density of an orientation group of {100}<011> to {223}<110> is 1.0 to 5.0, a pole density of a crystal orientation {332}<113> is 1.0 to 4.0, a Lankford-value rC in a direction perpendicular to a rolling direction is 0.70 to 1.50, and a Lankford-value r30 in a direction making an angle of 30° with the rolling direction is 0.70 to 1.50. Moreover, the cold-rolled steel sheet includes, as a metallographic structure, by area %, a ferrite and a bainite of 30% to 99% in total and a martensite of 1% to 70%.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: April 23, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yuri Toda, Riki Okamoto, Nobuhiro Fujita, Kohichi Sano, Hiroshi Yoshida, Toshio Ogawa, Kunio Hayashi, Kazuaki Nakano
  • Patent number: 10253398
    Abstract: The high-strength steel for steel forgings according to the present invention has a composition that includes, as basic components, C: 0.35 mass % to 0.47 mass %; Si: 0 mass % to 0.4 mass %; Mn: 0.6 mass % to 1.5 mass %; Ni: more than 0 mass % up to 2.0 mass %; Cr: 0.8 mass % to 2.5 mass %; Mo: 0.10 mass % to 0.7 mass %; V: 0.035 mass % to 0.20 mass %; Al: 0.015 mass % to 0.050 mass %; N: 30 ppm to 100 ppm, and O: more than 0 ppm up to 30 ppm, the balance being Fe and inevitable impurities. The metal structure is mainly bainite, martensite or a mixed structure of bainite and martensite. Among cubic B1-type precipitates, the number of coherent precipitates having a diameter equal to or smaller than 30 nm is equal to or smaller than 50/?m2.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: April 9, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Hiroyuki Takaoka, Tomonori Ikegami
  • Patent number: 10253390
    Abstract: A method of making a cold-rolled steel plate has a chemical composition containing, on the basis of percent by mass, C from 0.03 to 0.12%, Si from 0 to 1.0%, Mn from 0.2 to 0.8%, P at 0.03% or less, S at 0.03% or less, and Al at 0.05% or less. The chemical composition further contains any one of Nb from 0.03 to 0.4% and V from 0.03 to 0.3%. These elements satisfy 5*C %?Si %+Mn %?1.5*Al %<1 within the aforementioned range of the corresponding content. A residue is formed of Fe and unavoidable impurities. An average diameter of particles of carbides containing any one of Nb, V and Ti as precipitates is from 20 to 100 nm. In this way, the chemical composition is regulated and the precipitates are dispersed finely and uniformly, thereby enhancing heat spot resistance and antiwear performance.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: April 9, 2019
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Satoshi Tagashira, Masahito Suzuki, Tomohiro Imanaka