Patents by Inventor Yoshitsugu Suzuki

Yoshitsugu Suzuki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11066721
    Abstract: A high-strength hot-dip coated hot-rolled steel sheet excellent in terms of surface appearance quality and coating adhesiveness and a method for manufacturing. The method includes performing hot rolling followed by pickling on steel to form a pickled steel sheet, the steel having a chemical composition containing, by mass %, C: 0.02% or more and 0.30% or less, Si: 0.01% or more and 1.0% or less, Mn: 0.3% or more and 2.5% or less, P: 0.08% or less, S: 0.02% or less, Al: 0.001% or more and 0.20% or less, and Fe and inevitable impurities. The method further includes performing rolling with a rolling reduction ratio of 1% or more and 10% or less, and a hot-dip coating treatment. The obtained steel sheet has an arithmetic average roughness Ra of 2.0 ?m or less on the surface of the steel sheet, and a tensile strength of 590 MPa or more.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: July 20, 2021
    Assignee: JFE STEEL CORPORATION
    Inventors: Masaki Koba, Yoshitsugu Suzuki, Hiroyuki Masuoka
  • Publication number: 20210208696
    Abstract: Apparatus and systems for operating pen-shaped input devices in a plurality of set modes are disclosed herein. Various apparatus and systems include an input acceptance unit that receives a pen-based input signal from a pen-shaped input device for operating in a plurality of set modes, the input signal including information on a contact position of the pen-shaped input device on a display screen, a mode decision unit that determines which set mode of the plurality of set modes that the pen-shaped input device is currently operating, and a signal conversion unit that converts the pen-based input signal to a mouse-based input signal in response to the mode decision unit determining that the set mode of the plurality of set modes that the pen-shaped input device is currently operating is a direct mouse mode. Methods for executing the various functions of the apparatus and/or systems are also disclosed herein.
    Type: Application
    Filed: December 28, 2020
    Publication date: July 8, 2021
    Inventors: Yoshitsugu Suzuki, Ryohta Nomura, Seiichi Kawano, Yuichi Shigematsu
  • Publication number: 20210132794
    Abstract: Methods, systems, and apparatus that overlay a touch panel with a precision touch pad are disclosed. One method includes detecting, by a processor of an information handling device, a touch position of a touch on a display unit, generating a touch panel area where the touch panel is formed, a second area that is not controlled by an operating system and that is overlaid on a first area of a touch screen controlled by the operating system according to a predetermined operation, and generating a signal indicating that a precision touch pad is touched in response to the second area being touched. Apparatus and computer program products for performing the method are also disclosed.
    Type: Application
    Filed: November 4, 2020
    Publication date: May 6, 2021
    Inventors: Yuichi Shigematsu, Seiichi Kawano, Ryohta Nomura, Yoshitsugu Suzuki
  • Publication number: 20210132786
    Abstract: An information processing device includes an obtaining unit configured to obtain a result of detection by a first detection sensor that detects a first touch operation relative to a first panel and a result of detection by a second detection sensor that detects a second touch operation relative to a second panel; and an integration unit configured to integrate, based on the results of detection obtained by the obtaining unit, the result of detection of the first touch operation relative to the first panel and the result of detection of the second touch operation relative to the second panel as a result of detection of a touch operation relative to a panel resulting from integration of the first panel and the second panel into one panel.
    Type: Application
    Filed: January 15, 2020
    Publication date: May 6, 2021
    Applicant: LENOVO (SINGAPORE) PTE. LTD.
    Inventors: Yoshitsugu Suzuki, Seiichi Kawano, Ryohta Nomura, Mitsuhiro Yamazaki
  • Publication number: 20210130920
    Abstract: A high-strength galvanized steel sheet of the present invention includes a steel sheet having a chemical composition containing a predetermined component element, and a steel structure in which an average grain size of inclusions containing at least one of Al, Si, Mg, and Ca and existing in an area extending from a surface to a position of ? of a sheet thickness is 50 ?m or less, and an average nearest distance between ones of the inclusions is 20 ?m or more; and a galvanized layer provided on a surface of the steel sheet and having a coating weight per one surface of 20 g/m2 or more and 120 g/m2 or less, in which an amount of diffusible hydrogen contained in the steel is less than 0.25 mass ppm, and a tensile strength is 1100 MPa or more.
    Type: Application
    Filed: March 29, 2019
    Publication date: May 6, 2021
    Applicant: JFE Steel Corporation
    Inventors: Hiromi YOSHITOMI, Tatsuya NAKAGAITO, Masaki KOBA, Yoshitsugu SUZUKI
  • Patent number: 10988836
    Abstract: A method for producing a high-strength galvanized steel sheet having excellent fatigue resistance properties. The method includes an oxidation processing in which a steel sheet is heated at a temperature of 400 to 750° C. in an atmosphere having an O2 concentration of 1000 ppm by volume or more and a H2O concentration of 1000 ppm by volume or more, and the steel sheet is heated at a temperature of 600 to 850° C. in an atmosphere having an O2 concentration of less than 1000 ppm by volume and a H2O concentration of 1000 ppm by volume or more. The method also includes reduction-annealing in which the steel sheet is heated at a heating rate of 0.1° C./sec or more to a temperature of 650 to 900° C. in an atmosphere having a H2 concentration of 5 to 30 vol % and a H2O concentration of 10 to 1000 ppm by volume.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: April 27, 2021
    Assignee: JFE STEEL CORPORATION
    Inventors: Yoichi Makimizu, Yoshitsugu Suzuki, Gentaro Takeda, Hiroshi Hasegawa
  • Publication number: 20210115529
    Abstract: A high-strength galvanized steel sheet includes a steel sheet containing a predetermined component element, a mass ratio of a content amount of Si to a content amount of Mn in the steel (Si/Mn) being 0.2 or more, and a steel structure in which an average grain size of inclusions existing in an area extending from a surface to a position of ? of a sheet thickness is 50 ?m or less, and an average nearest distance between ones of the inclusions is 20 ?m or more; and a galvanized layer provided on a surface of the steel sheet, in which an amount of diffusible hydrogen contained in the steel is less than 0.25 mass ppm, oxides containing predetermined elements in an outer layer portion of the steel sheet account for 0.010 g/m2 or more per one surface, and a tensile strength is 1100 MPa or more.
    Type: Application
    Filed: March 29, 2019
    Publication date: April 22, 2021
    Applicant: JFE Steel Corporation
    Inventors: Hiromi Yoshitomi, Masaki Koba, Tatsuya Nakagaito, Yoshitsugu Suzuki
  • Patent number: 10941475
    Abstract: A method for producing a high-strength galvanized steel sheet having excellent fatigue resistance properties. The method includes an oxidation processing in which a steel sheet is heated at a temperature of 400 to 750° C. in an atmosphere having an O2 concentration of 1000 ppm by volume or more and a H2O concentration of 1000 ppm by volume or more, and the steel sheet is heated at a temperature of 600 to 850° C. in an atmosphere having an O2 concentration of less than 1000 ppm by volume and a H2O concentration of 1000 ppm by volume or more. The method also includes reduction-annealing in which the steel sheet is heated at a heating rate of 0.1° C./sec or more to a temperature of 650 to 900° C. in an atmosphere having a H2 concentration of 5 to 30 vol % and a H2O concentration of 10 to 1000 ppm by volume.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: March 9, 2021
    Assignee: JFE STEEL CORPORATION
    Inventors: Yoichi Makimizu, Yoshitsugu Suzuki, Gentaro Takeda, Hiroshi Hasegawa
  • Publication number: 20210025045
    Abstract: A high-strength galvanized steel sheet includes a steel sheet having a chemical composition containing a predetermined component element, a mass ratio of a content of Si to a content of Mn in the steel (Si/Mn) being 0.1 or more and less than 0.2, and the balance: Fe and incidental impurities, and a steel structure in which an average grain size of inclusions containing at least one of Al, Si, Mg, and Ca and existing in an area extending from a surface to a position of ? of a sheet thickness is 50 ?m or less, and an average nearest distance between ones of the inclusions is 20 ?m or more; and a galvanized layer provided on a surface of the steel sheet, in which an amount of diffusible hydrogen contained in the steel is less than 0.25 mass ppm, and a tensile strength is 1100 MPa or more.
    Type: Application
    Filed: March 29, 2019
    Publication date: January 28, 2021
    Applicant: JFE Steel Corporation
    Inventors: Hiromi Yoshitomi, Masaki Koba, Tatsuya Nakagaito, Yoshitsugu Suzuki
  • Publication number: 20200308664
    Abstract: Provided are a high-strength galvannealed steel sheet, and a manufacturing method therefor. The manufacturing method is for a high-strength galvannealed steel sheet which includes a zinc coated layer with a coating weight of 20 to 120 g/m2 per side on a surface of a steel sheet having a chemical composition containing, in mass %, C: 0.03 to 0.35%, Si: 0.01 to 1.00%, Mn: 3.6 to 8.0%, Al: 0.001 to 1.00%, P: 0.100% or less, and S: 0.010% or less, with the balance being Fe and inevitable impurities. The method includes: setting a cold rolling reduction ratio to 20% or more and 35% or less when cold rolling is performed on the steel sheet, and setting a maximum steel sheet temperature to be reached in an annealing furnace to 600° C. or higher and 700° C. or lower when annealing is further performed on the steel sheet.
    Type: Application
    Filed: June 5, 2017
    Publication date: October 1, 2020
    Applicant: JFE Steel Corporation
    Inventors: Satoshi Maeda, Yoichi Makimizu, Yoshitsugu Suzuki, Yoshiyasu Kawasaki
  • Patent number: 10752975
    Abstract: A method of producing a galvannealed steel sheet includes: annealing a steel strip by conveying the steel strip through a heating zone including a direct fired furnace, a soaking zone, and a cooling zone in this order in an annealing furnace; hot-dip galvanizing the steel strip discharged from the cooling zone; and heat-alloying a galvanized coating formed on the steel strip. Mixed gas of humidified gas and dry gas is supplied into the soaking zone from at least one gas supply port located in a region of lower ½ of the soaking zone in a height direction so that a dew point measured in a region of upper ? of the soaking zone in the height direction and a dew point measured in a region of lower ? of the soaking zone in the height direction are both 20° C. or more and 0° C. or less.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: August 25, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Gentaro Takeda, Masaru Miyake, Yoichi Makimizu, Yoshitsugu Suzuki, Yoshikazu Suzuki
  • Patent number: 10704117
    Abstract: Provided are a cold-rolled steel sheet which can preferably be used for manufacturing a high-strength galvanized steel sheet and methods for manufacturing the steel sheets. The cold-rolled steel sheet has a specified chemical composition, in which the Mn concentration in a surface layer of the steel sheet satisfies relational expression (1) and relational expression (2) below. 8?(Cp/Cc)×Mn . . . (1) (Cmin/Cc)×Mn?2.5 . . . (2) where Cp: maximum Mn concentration in a region within 0.5 ?m of the surface of a steel sheet in the thickness direction; Cc: average Mn concentration in a region from a position located 5 ?m from a surface of a steel sheet in the thickness direction to a position located 5 ?m from an opposite surface in the thickness direction; Cmin: minimum Mn concentration in a region from 0.5 ?m to 5 ?m from the surface of a steel sheet in the thickness direction; and Mn: Mn content (mass %).
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: July 7, 2020
    Assignee: JFE Steel Corporation
    Inventors: Kenji Kawamura, Noriaki Kohsaka, Yoshimasa Funakawa, Mai Aoyama, Yoshitsugu Suzuki
  • Publication number: 20200199726
    Abstract: A method for producing a high-strength galvanized steel sheet having excellent fatigue resistance properties. The method includes an oxidation processing in which a steel sheet is heated at a temperature of 400 to 750° C. in an atmosphere having an O2 concentration of 1000 ppm by volume or more and a H2O concentration of 1000 ppm by volume or more, and the steel sheet is heated at a temperature of 600 to 850° C. in an atmosphere having an O2 concentration of less than 1000 ppm by volume and a H2O concentration of 1000 ppm by volume or more. The method also includes reduction-annealing in which the steel sheet is heated at a heating rate of 0.1° C./sec or more to a temperature of 650 to 900° C. in an atmosphere having a H2 concentration of 5 to 30 vol % and a H2O concentration of 10 to 1000 ppm by volume.
    Type: Application
    Filed: February 16, 2017
    Publication date: June 25, 2020
    Applicant: JFE STEEL CORPORATION
    Inventors: Yoichi MAKIMIZU, Yoshitsugu SUZUKI, Gentaro TAKEDA, Hiroshi HASEGAWA
  • Patent number: 10662516
    Abstract: Provided is a hot-dip Al—Zn—Mg—Si coated steel sheet having good corrosion resistance in flat parts and edge parts, and also having excellent worked part corrosion resistance. The hot-dip Al—Zn—Mg—Si coated steel sheet includes a base steel sheet and a hot-dip coating on a surface of the base steel sheet. The hot-dip coating includes an interfacial alloy layer present at an interface with the base steel sheet and a main layer present on the interfacial alloy layer, and contains from 25 mass % to 80 mass % of Al, from greater than 0.6 mass % to 15 mass % of Si, and from greater than 0.1 mass % to 25 mass % of Mg. The Mg content and Si content in the hot-dip coating satisfy formula (1): MMg/(MSi?0.6)>1.7??(1) where MMg represents the Mg content (mass %) and MSi represents the Si content (mass %).
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: May 26, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Toshihiko Ooi, Yohei Sato, Yoichi Tobiyama, Toshiyuki Okuma, Akihiko Furuta, Masahiro Yoshida, Yoshitsugu Suzuki, Satoru Ando, Akira Matsuzaki
  • Patent number: 10648054
    Abstract: A method for producing high-strength galvanized steel sheets having excellent coating adhesion, workability and appearance. The method comprises hot rolling a slab comprising, by mass %, C: 0.05 to 0.30%, Si: 0.1 to 2.0% and Mn: 1.0 to 4.0%, then coiling the steel sheet into a coil at a specific temperature TC, and pickling the steel sheet, cold rolling the hot-rolled steel sheet resulting from the hot rolling, annealing the cold-rolled steel sheet resulting from the cold rolling under specific conditions, and galvanizing the annealed sheet resulting from the annealing in a galvanizing bath containing 0.12 to 0.22 mass % Al.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: May 12, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Yoichi Makimizu, Yoshitsugu Suzuki, Hideyuki Takahashi, Gentaro Takeda, Koichiro Fujita
  • Patent number: 10590503
    Abstract: Provided are a high-strength galvanized steel sheet which can preferably be used as a material for automobile parts and a method for manufacturing the steel sheet. The steel sheet has a C content of 0.15% or less, in which an area ratio of ferrite is 10% or less, an area ratio of bainitic ferrite is 2% or more and 30% or less, an area ratio of martensite is 60% or more and 98% or less, an area ratio of retained austenite is less than 2%, an average grain diameter of martensite adjacent to bainite is 15 ?m or less, a proportion of massive martensite adjacent only to bainite to the whole metallographic structure is 10% or less, and a value (?Hv) calculated by subtracting the Vickers hardness at a position located at 20 ?m from the surface of the steel sheet from the Vickers hardness at a position located at 100 ?m from the surface of the steel sheet is 30 or more.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: March 17, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Hiroshi Hasegawa, Shinjiro Kaneko, Yoichi Makimizu, Yoshitsugu Suzuki
  • Patent number: 10570474
    Abstract: A method for manufacturing a high-strength galvanized steel sheet. The method includes a first heating step of holding the steel sheet in a temperature range of 750° C. to 880° C. for 20 s to 600 s in an atmosphere having an H2 concentration of 0.05% to 25.0% by volume and a dew point of ?45° C. to ?10° C., a cooling step, a rolling step of rolling the steel sheet with a rolling reduction of 0.3% to 2.0%, a pickling step of pickling the steel sheet with a pickling weight loss of 0.02 gram/m2 to 5 gram/m2 in terms of Fe, a second heating step of holding the steel sheet in a temperature range of 720° C. to 860° C. for 20 sec. to 300 sec. in an atmosphere having an H2 concentration of 0.05% to 25.0% by volume and a dew point of ?10° C. or lower, and a galvanizing step.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: February 25, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Mai Aoyama, Yoshitsugu Suzuki, Hideyuki Kimura
  • Patent number: 10526676
    Abstract: Provided are a high-strength steel sheet, which is suitable as a material of automotive parts, and a method for producing the high-strength steel sheet. In the high-strength steel sheet, the C content is 0.15% or less, the area ratio of ferrite is 8% to 45%, the area ratio of martensite is 55% to 85%, the proportion of martensite grains adjacent to only ferrite grains in the entire microstructure is 15% or less, the average crystal grain sizes of ferrite and martensite are each 10 ?m or less, and the area ratio of ferrite grains having a size of 10 ?m or more to all the ferrite grains included in a portion of the steel sheet which extends from 20 to 100 ?m below the surface thereof is less than 5%.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: January 7, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Hiroshi Hasegawa, Shinjiro Kaneko, Yoichi Makimizu, Yoshitsugu Suzuki
  • Patent number: 10450642
    Abstract: A high-strength galvanized steel sheet that includes a chemical composition containing, by mass %, C: 0.15% or more and 0.25% or less, Si: 0.50% or more and 2.5% or less, Mn: 2.3% or more and 4.0% or less, P: 0.100% or less, S: 0.02% or less, Al: 0.01% or more and 2.5% or less, and Fe and inevitable impurities. The steel sheet having a microstructure containing, by an area percentage basis, a tempered martensite phase: 30% or more and 73% or less, a ferrite phase: 25% or more and 68% or less, a retained austenite phase: 2% or more and 20% or less, and other phases: 10% or less (including 0%), the other phases containing a martensite phase: 3% or less (including 0%) and a bainitic ferrite phase: less than 5% (including 0%).
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: October 22, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Hiroshi Hasegawa, Hideyuki Kimura, Yoshimasa Funakawa, Yoichi Makimizu, Yoshitsugu Suzuki
  • Patent number: 10370737
    Abstract: A high-strength galvanized steel sheet and method for producing the same. The high-strength galvanized steel sheet including a specified chemical composition and a microstructure comprising, in terms of area fraction, a tempered martensite phase: 30% or more and 73% or less, a ferrite phase: 25% or more and 68% or less, a retained austenite phase: 2% or more and 15% or less, and other phases: 10% or less (including 0%), the other phases comprising a martensite phase: 3% or less (including 0%) and a bainitic ferrite phase: less than 5% (including 0%), the tempered martensite phase having an average grain size of 8 ?m or less, the ferrite phase having an average grain size of 5 ?m or less, and the retained austenite phase having a C content less than 0.7% by mass.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: August 6, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Hiroshi Hasegawa, Hideyuki Kimura, Yoshimasa Funakawa, Yoichi Makimizu, Yoshitsugu Suzuki