Patents by Inventor Shuichi Nakamura

Shuichi Nakamura 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).

  • Publication number: 20220119905
    Abstract: A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al2O3 in an annealing separator is controlled, a final annealing process where an oxidation degree is controlled when atmosphere includes hydrogen or a dew point is controlled when atmosphere consists of inert gas, and an insulation coating forming process where a baking temperature and a heat treatment temperature are controlled.
    Type: Application
    Filed: January 16, 2020
    Publication date: April 21, 2022
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Shinsuke TAKATANI, Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Shohji NAGANO, Shunsuke OKUMURA
  • Publication number: 20220112573
    Abstract: A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al2O3 in an annealing separator is controlled, a final annealing process where an oxidation degree is controlled when atmosphere includes hydrogen or a dew point is controlled when atmosphere consists of inert gas, and an insulation coating forming process where a baking temperature and a heat treatment temperature are controlled.
    Type: Application
    Filed: January 16, 2020
    Publication date: April 14, 2022
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Shinsuke TAKATANI, Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Shunsuke OKUMURA, Shohji NAGANO
  • Publication number: 20220102035
    Abstract: A grain-oriented electrical steel sheet according to an aspect of the present invention includes an underlying steel sheet and a tension-insulation coating arranged on the surface of the underlying steel sheet, and a ten-point average roughness RzL in an L direction obtained when the tension-insulation coating is removed from the grain-oriented electrical steel sheet with an alkaline solution, and then the surface of the underlying steel sheet is measured in a rolling direction is 6.0 ?m or less.
    Type: Application
    Filed: January 16, 2020
    Publication date: March 31, 2022
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Shuichi NAKAMURA, Yoshiyuki USHIGAMI, Hiroyasu FUJII
  • Publication number: 20220098694
    Abstract: A method for manufacturing a grain-oriented electrical steel sheet includes: a silicon steel material production process of producing a silicon steel material; a hot rolling process of obtaining a hot rolled sheet by subjecting the silicon steel material to hot rolling; a cold rolling process of obtaining a steel sheet of a final sheet thickness by subjecting the hot rolled sheet to a single cold rolling process or multiple cold rolling processes having intermediate annealing performed between the cold rolling processes; a decarburization annealing process of subjecting the steel sheet to decarburization annealing; and a final annealing process of applying an annealing separator containing alumina as a main component to the steel sheet and subjecting the steel sheet to final annealing. The silicon steel material contains: in terms of mass %, Si: 0.8 to 7.0%; C: 0.085% or less; acid-soluble Al: 0.010 to 0.065%; N: 0.004 to 0.012%; Mn: 1.00% or less; S: 0.050% or less; a total of 0.01 to 0.
    Type: Application
    Filed: January 16, 2020
    Publication date: March 31, 2022
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Hiroyasu FUJII, Norikazu FUJII
  • Publication number: 20220090267
    Abstract: A grain-oriented electrical steel sheet includes a base steel sheet which contains Si and Mn, an intermediate layer which is disposed on a surface of the base steel sheet and contains a silicon oxide as a main component, and an insulation coating which is disposed on a surface of the intermediate layer. A final-annealed film is not substantially present on a surface of the base steel sheet. In a surface layer region of grain-oriented electrical steel sheet, a Mn-depletion layer having a valley portion of a Mn content in which a Mn content is lower than an average Mn content of the base steel sheet in a region deeper than the surface layer region is provided, and a Mn-rich layer having a peak portion of a Mn content in which a Mn content is higher than that in the valley portion of the Mn content is provided in a region closer to a surface of the insulation coating than the Mn-depletion layer.
    Type: Application
    Filed: January 16, 2020
    Publication date: March 24, 2022
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Shinji YAMAMOTO, Yoshiyuki USHIGAMI, Shinsuke TAKATANI, Shuichi NAKAMURA
  • Publication number: 20210388459
    Abstract: A method for manufacturing a grain-oriented electrical steel sheet includes: a silicon steel material production process of producing a silicon steel material; a hot rolling process of obtaining a hot rolled sheet by subjecting the silicon steel material to hot rolling; a cold rolling process of obtaining a steel sheet having a final sheet thickness by subjecting the hot rolled sheet to a single cold rolling process or to multiple cold rolling processes having intermediate annealing performed between cold rolling processes; a decarburization annealing process of subjecting the steel sheet to decarburization annealing using a decarburization annealing furnace including a heating area and a soaking area; and a final annealing process of applying an annealing separator having alumina as a main component to the steel sheet and subjecting the steel sheet to final annealing, wherein, in the decarburization annealing process, when X represents the Cr content of the silicon steel material in terms of mass %, an oxida
    Type: Application
    Filed: January 16, 2020
    Publication date: December 16, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Hiroyasu FUJII
  • Patent number: 11189407
    Abstract: A grain-oriented electrical steel sheet includes: a steel sheet; and an amorphous oxide layer that is formed on the steel sheet, in which a glossiness of a surface is 150% or higher.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: November 30, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Shinsuke Takatani, Yoshiyuki Ushigami, Hiroyasu Fujii, Shuichi Nakamura, Takeshi Imai
  • Publication number: 20210355557
    Abstract: A grain oriented electrical steel sheet includes the texture aligned with Goss orientation. In the grain oriented electrical steel sheet, when (?1 ?1 ?1) and (?2 ?2 ?2) represent deviation angles of crystal orientations measured at two measurement points which are adjacent on the sheet surface and which have an interval of 1 mm, the boundary condition BA is defined as [(?2??1)2+(?2??1)2+(?2??1)2]1/2?0.5°, and the boundary condition BB is defined as [(?2??2)2+(?2??1)2+(?2??1)2]1/2?2.0°, the boundary which satisfies the boundary condition BA and which does not satisfy the boundary condition BB is included.
    Type: Application
    Filed: July 31, 2019
    Publication date: November 18, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Shuichi NAKAMURA, Yusuke KAWAMURA, Shota MORIMOTO
  • Publication number: 20210317542
    Abstract: In a base sheet for a grain-oriented electrical steel sheet of the present invention, an amount of surface oxygen x per one surface of the base sheet and a value y of a peak (?R/R0 @1250 cm?1) of SiO2 on the surface of the base sheet obtained by infrared reflection spectroscopy satisfy y?1500x2.5 and y?0.24. A method of manufacturing the base sheet for a grain-oriented electrical steel sheet of the present invention includes: adjusting the amount of surface oxygen per one surface of a final-annealed grain-oriented silicon steel sheet to more than 0.01 g/m2 and 0.05 g/m2 or less, or more than 0.05 g/m2 and 0.10 g/m2 or less; and performing thermal oxidation annealing in an atmosphere in which an oxidation potential represented by a ratio PH2O/PH2 of water vapor pressure to hydrogen pressure is 0.0081 or less in a case where the amount of surface oxygen is more than 0.01 g/m2 and 0.05 g/m2 or less, or in an atmosphere in which the oxidation potential is 0.
    Type: Application
    Filed: July 13, 2018
    Publication date: October 14, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Shuichi NAKAMURA, Seiki TAKEBAYASHI, Yoshiyuki USHIGAMI, Shinsuke TAKATANI, Hiroyasu FUJII
  • Publication number: 20210272728
    Abstract: A grain oriented electrical steel sheet includes: by mass %, 0.010% or less of C; 2.50 to 4.00% of Si; 0.0010 to 0.0100% of acid soluble Al; 0.012% or less of N; 1.00% or less of Mn; 0.02% or less of S; and a balance consisting of Fe and impurities, and has a tension-insulation coating at steel sheet surface and a SiO2 intermediate oxide film layer with an average thickness of 1.0 nm to 1.0 ?m at an interface between the tension-insulation coating and the steel sheet surface. In the grain oriented electrical steel, a time differential curve fM(t) of a glow discharge optical emission spectrum of a metallic element M (Al) in the SiO2 intermediate oxide film layer satisfies a predetermined condition.
    Type: Application
    Filed: July 13, 2018
    Publication date: September 2, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Takashi KATAOKA, Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Hiroyasu FUJII, Yoichi ZAIZEN
  • Publication number: 20210246524
    Abstract: A grain oriented electrical steel sheet includes the texture aligned with Goss orientation. In the grain oriented electrical steel sheet, when (?1 ?1 ?1) and (?2 ?2 ?2) represent deviation angles of crystal orientations measured at two measurement points which are adjacent on the sheet surface and which have an interval of 1 mm, the boundary condition BA is defined as |?2??1|?0.5°, and the boundary condition BB is defined as [(?2??1)2+(?2??1)2+(?2??1)2]1/2?2.0°, the boundary which satisfies the boundary condition BA and which does not satisfy the boundary condition BB is included.
    Type: Application
    Filed: July 31, 2019
    Publication date: August 12, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Shuichi NAKAMURA, Yusuke KAWAMURA, Shingo OKADA, Tomoaki ITO, Shinya YANO
  • Patent number: 11060159
    Abstract: A grain-oriented electrical steel sheet according to an aspect of the present invention includes: a steel sheet 1; an intermediate layer 4 containing Si and O, arranged on the steel sheet; and an insulation coating 3 arranged on the intermediate layer 4, in which the intermediate layer 4 contains a metal phosphide 5, a thickness of the intermediate layer 4 is 4 nm or more, and an abundance of the metal phosphide 5 present is 1% to 30% by cross-sectional area fraction in a cross section of the intermediate layer 4.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: July 13, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Seiki Takebayashi, Shuichi Nakamura, Hiroyasu Fujii, Yoshiyuki Ushigami
  • Publication number: 20210123115
    Abstract: A grain oriented electrical steel sheet includes: by mass %, 0.010% or less of C; 2.50 to 4.00% of Si; 0.010% or less of acid soluble Al; 0.012% or less of N; 1.00% or less of Mn; 0.020% or less of S; and a balance consisting of Fe and impurities, and has a tension-insulation coating at steel sheet surface and a SiO2 intermediate oxide film layer with an average thickness of 1.0 nm to 1.0 ?m at an interface between the tension-insulation coating and the steel sheet surface. In the grain oriented electrical steel, when a surface of the intermediate oxide film layer is analyzed by an infrared reflection spectroscopy, a peak intensity IA at 1250 cm?1 and a peak intensity IB at 1200 cm?1 satisfy IB/IA?0.010.
    Type: Application
    Filed: July 13, 2018
    Publication date: April 29, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Takashi KATAOKA, Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Hiroyasu FUJII, Shunsuke OKUMURA
  • Publication number: 20200203047
    Abstract: A grain-oriented electrical steel sheet includes: a steel sheet; and an amorphous oxide layer that is formed on the steel sheet, in which a glossiness, of a surface is 150% or higher.
    Type: Application
    Filed: July 13, 2018
    Publication date: June 25, 2020
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Shinsuke TAKATANI, Yoshiyuki USHIGAMI, Hiroyasu FUJII, Shuichi NAKAMURA, Takeshi IMAI
  • Publication number: 20200123662
    Abstract: A grain-oriented electrical steel sheet includes: a base steel sheet; an intermediate layer arranged in contact with the base steel sheet; and an insulation coating arranged in contact with the intermediate layer to be an outermost surface, in which the insulation coating has a crystalline phosphide-containing layer containing a crystalline phosphide in an area in contact with the intermediate layer when viewing a cross section whose cutting direction is parallel to a thickness direction.
    Type: Application
    Filed: July 13, 2018
    Publication date: April 23, 2020
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Seiki TAKEBAYASHI, Shuichi NAKAMURA, Hiroyasu FUJII, Yoshiyuki USHIGAMI, Shinsuke TAKATANI
  • Publication number: 20200126698
    Abstract: A grain-oriented electrical steel sheet includes: a base steel sheet; an intermediate layer arranged in contact with the base steel sheet; and an insulation coating arranged in contact with the intermediate layer to be an outermost surface, in which the intermediate layer has a local oxidized area when viewing a cross section whose cutting direction is parallel to a thickness direction, and a thickness of the intermediate layer in an area where the local oxidized area is included is 50 nm or more, and a thickness of the intermediate layer in an area where the local oxidized area is not included is less than 50 nm.
    Type: Application
    Filed: July 13, 2018
    Publication date: April 23, 2020
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Seiki TAKEBAYASHI, Shuichi NAKAMURA, Hiroyasu FUJII, Yoshiyuki USHIGAMI, Shinsuke TAKATANI
  • Publication number: 20200123626
    Abstract: A grain-oriented electrical steel sheet according to an aspect of the present invention includes: a steel sheet 1; an intermediate layer 4 containing Si and O, arranged on the steel sheet; and an insulation coating 3 arranged on the intermediate layer 4, in which the intermediate layer 4 contains a metal phosphide 5, a thickness of the intermediate layer 4 is 4 nm or more, and an abundance of the metal phosphide 5 present is 1% to 30% by cross-sectional area fraction in a cross section of the intermediate layer 4.
    Type: Application
    Filed: July 13, 2018
    Publication date: April 23, 2020
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Seiki TAKEBAYASHI, Shuichi NAKAMURA, Hiroyasu FUJII, Yoshiyuki USHIGAMI
  • Patent number: 10355876
    Abstract: In a communication device, when an enabling signal is at a high level and a transmit data is at a high level, that is, in a recessive period, both transistors turn off. Thus, potentials of signal lines are determined by power supply from a second transmitting part to a communications network. When an error frame arises in this state, that is, transistors in the other ECU turn on, excessive currents flow the signal lines. When current monitoring circuits detect error currents, an error signal is changed to a high level.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: July 16, 2019
    Assignee: DENSO CORPORATION
    Inventors: Tomohisa Kishigami, Shuichi Nakamura
  • Publication number: 20190209126
    Abstract: An object information acquiring apparatus, comprises a photoacoustic image acquiring unit configured to generate a first image related to optical characteristics within the object; an ultrasonic image acquiring unit configured to generate a second image related to acoustic characteristics within the object; a region of interest designating unit configured to receive designation of a region of interest with regard to the first image; an image processing unit configured to perform image processing on the first image inside the region of interest and outside the region of interest, respectively, using different image processing parameters; and an image synthesizing unit configured to superimpose and synthesize the first image, which has been image processed, and the second image.
    Type: Application
    Filed: March 15, 2019
    Publication date: July 11, 2019
    Inventors: Shuichi Nakamura, Hiroshi Abe
  • Patent number: 10313152
    Abstract: A transmission circuit includes a first transmitter and a second transmitter. The first transmitter turns OFF first transistors when a transmission data is in a high level, and turns ON the first transistors when the transmission data is in a low level. When a permission signal is in the high level, the second transmitter turns ON the second transistors when the transmission data is in the high level, and turns OFF the second transistors when the transmission data is in the low level. Diodes are set to suppress an amplitude of a differential signal in an ON time of the second transistors more than an amplitude of a differential signal in an ON time of the first transistors, to suppress ringing and radiation noise.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: June 4, 2019
    Assignee: DENSO CORPORATION
    Inventors: Tomohisa Kishigami, Shuichi Nakamura