Patents by Inventor Masayasu Nagoshi

Masayasu Nagoshi 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: 10889875
    Abstract: A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: January 12, 2021
    Assignee: JFE STEEL CORPORATION
    Inventors: Masayasu Nagoshi, Tomohiro Matsushima, Makoto Watanabe, Shigehiro Takajo, Toshito Takamiya, Masanori Uesaka, Takashi Terashima
  • Patent number: 10697038
    Abstract: A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: June 30, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Masayasu Nagoshi, Tomohiro Matsushima, Makoto Watanabe, Shigehiro Takajo, Toshito Takamiya, Masanori Uesaka, Takashi Terashima
  • Publication number: 20190292623
    Abstract: A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.
    Type: Application
    Filed: June 5, 2019
    Publication date: September 26, 2019
    Applicant: JFE STEEL CORPORATION
    Inventors: Masayasu NAGOSHI, Tomohiro MATSUSHIMA, Makoto WATANABE, Shigehiro TAKAJO, Toshito TAKAMIYA, Masanori UESAKA, Takashi TERASHIMA
  • Patent number: 10392706
    Abstract: A method for producing a galvanized steel sheet includes an oxide layer forming step of bringing a galvanized steel sheet into contact with an acidic solution containing sulfate ions, then holding the galvanized steel sheet in contact for 1 to 60 seconds, and then washing the galvanized steel sheet with water; and a neutralization treatment step of holding a surface of an oxide layer, which has been formed in the oxide layer forming step, in contact with an alkaline aqueous solution for 0.5 seconds or longer, and then performing washing with water and drying. The alkaline aqueous solution contains P ions at a P concentration of 0.01 g/L or more and carbonate ions at a carbonate ion concentration of 0.1 g/L or more.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: August 27, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Katsuya Hoshino, Shoichiro Taira, Masayasu Nagoshi, Kazutoshi Hanada
  • Patent number: 10351960
    Abstract: Provided is a method for producing a galvanized steel sheet that includes an oxide layer forming step of bringing a galvanized steel sheet into contact with an acidic solution containing sulfate ions, then holding the galvanized steel sheet in contact for 1 to 60 seconds, and then washing the galvanized steel sheet with water; and a neutralization treatment step of holding a surface of an oxide layer, which has been formed in the oxide layer forming step, in contact with an alkaline aqueous solution for 0.5 seconds or longer, and then performing washing with water and drying. The alkaline aqueous solution contains 0.1 g/L or more of carbonate ions.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: July 16, 2019
    Assignee: JFE Steel Corporation
    Inventors: Katsuya Hoshino, Shoichiro Taira, Masayasu Nagoshi, Kazutoshi Hanada
  • Patent number: 10151718
    Abstract: The present invention makes it possible to analyze trace carbon in a sample without the effects of contamination. In an electron probe microanalyzer, a liquid nitrogen trap and a plasma or oxygen radical generator are jointly used as a means for suppressing contamination, and two or more carbon detection units for detecting characteristic x-rays of carbon in the sample are provided.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: December 11, 2018
    Assignee: JFE STEEL CORPORATION
    Inventors: Yuji Tanaka, Takako Yamashita, Masayasu Nagoshi
  • Patent number: 9939382
    Abstract: The location where forsterite is present is checked in a region from which light excited by an electron beam is emitted when a material containing forsterite is irradiated with an electron beam. The material is preferably a grain oriented electrical steel sheet having a forsterite layer. In addition, it is preferable that the accelerating voltage be 10 kV or more when an electron beam is radiated when the material is a grain oriented electrical steel sheet having a tension coating layer on the forsterite layer.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: April 10, 2018
    Assignee: JFE Steel Corporation
    Inventors: Masayasu Nagoshi, Takako Yamashita, Yukio Usui, Shigehiro Takajo, Kazuhiro Hanazawa
  • Patent number: 9871258
    Abstract: A stainless steel having a low surface contact resistance for fuel cell separators is provided. The stainless steel has a Cr content of 16 to 40 mass % or more. The stainless steel includes a region having a fine textured structure on its surface, and the area percentage of the region is 50% or more, preferably 80% or more. The region having a fine textured structure is a region which has a structure having depressed portions and raised portions at an average interval between depressed portions or raised portions of 20 nm or more and 150 nm or less when observed with a scanning electron microscope.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: January 16, 2018
    Assignee: JFE STEEL CORPORATION
    Inventors: Masayasu Nagoshi, Shinsuke Ide, Shin Ishikawa, Noriko Makiishi
  • Publication number: 20170336336
    Abstract: The present invention makes it possible to analyze trace carbon in a sample without the effects of contamination. In an electron probe microanalyzer, a liquid nitrogen trap and a plasma or oxygen radical generator are jointly used as a means for suppressing contamination, and two or more carbon detection units for detecting characteristic x-rays of carbon in the sample are provided.
    Type: Application
    Filed: March 23, 2015
    Publication date: November 23, 2017
    Applicant: JFE STEEL CORPORATION
    Inventors: Yuji TANAKA, Takako YAMASHITA, Masayasu NAGOSHI
  • Patent number: 9809884
    Abstract: There is provided a method for manufacturing a galvanized steel sheet that has low sliding resistance in press forming and good degreasing property even under severe alkaline degreasing treatment conditions due to low temperature and short process line length. An oxide layer formed on the surface of a galvanized steel sheet is subjected to neutralization treatment using an alkaline aqueous solution containing 0.01 g/L or more of P ions and 0.01 g/L or more of colloid dispersed particles, wherein the alkaline aqueous solution preferably contains at least one phosphorus compound selected from phosphates, pyrophosphates, and triphosphates and at least one type of colloid dispersed particles selected from Ti, silica, Pt, Pd, Zr, Ag, Cu, Au, and Mg.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: November 7, 2017
    Assignee: JFE STEEL CORPORATION
    Inventors: Katsuya Hoshino, Shoichiro Taira, Wataru Tanimoto, Masayasu Nagoshi
  • Publication number: 20170240987
    Abstract: A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.
    Type: Application
    Filed: September 11, 2015
    Publication date: August 24, 2017
    Applicant: JFE Steel Corporation
    Inventors: Masayasu NAGOSHI, Tomohiro MATSUSHIMA, Makoto WATANABE, Shigehiro TAKAJO, Toshito TAKAMIYA, Masanori UESAKA, Takashi TERASHIMA
  • Publication number: 20170062843
    Abstract: A stainless steel having a low surface contact resistance for fuel cell separators is provided. The stainless steel has a Cr content of 16 to 40 mass % or more. The stainless steel includes a region having a fine textured structure on its surface, and the area percentage of the region is 50% or more, preferably 80% or more. The region having a fine textured structure is a region which has a structure having depressed portions and raised portions at an average interval between depressed portions or raised portions of 20 nm or more and 150 nm or less when observed with a scanning electron microscope.
    Type: Application
    Filed: November 15, 2016
    Publication date: March 2, 2017
    Applicant: JFE STEEL CORPORATION
    Inventors: Masayasu NAGOSHI, Shinsuke IDE, Shin ISHIKAWA, Noriko MAKIISHI
  • Publication number: 20170016121
    Abstract: Provided is a method for producing a galvanized steel sheet that includes an oxide layer forming step of bringing a galvanized steel sheet into contact with an acidic solution containing sulfate ions, then holding the galvanized steel sheet in contact for 1 to 60 seconds, and then washing the galvanized steel sheet with water; and a neutralization treatment step of holding a surface of an oxide layer, which has been formed in the oxide layer forming step, in contact with an alkaline aqueous solution for 0.5 seconds or longer, and then performing washing with water and drying. The alkaline aqueous solution contains 0.1 g/L or more of carbonate ions.
    Type: Application
    Filed: February 27, 2015
    Publication date: January 19, 2017
    Applicant: JFE STEEL CORPRATION
    Inventors: Katsuya Hoshino, Shoichiro Taira, Masayasu Nagoshi, Kazutoshi Hanada
  • Patent number: 9531014
    Abstract: A stainless steel having a low surface contact resistance for fuel cell separators is provided. The stainless steel has a Cr content of 16 to 40 mass % or more. The stainless steel includes a region having a fine textured structure on its surface, and the area percentage of the region is 50% or more, preferably 80% or more. The region having a fine textured structure is a region which has a structure having depressed portions and raised portions at an average interval between depressed portions or raised portions of 20 nm or more and 150 nm or less when observed with a scanning electron microscope.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: December 27, 2016
    Assignee: JFE STEEL CORPORATION
    Inventors: Masayasu Nagoshi, Shinsuke Ide, Shin Ishikawa, Noriko Makiishi
  • Publication number: 20160369406
    Abstract: A method for producing a galvanized steel sheet includes an oxide layer forming step of bringing a galvanized steel sheet into contact with an acidic solution containing sulfate ions, then holding the galvanized steel sheet in contact for 1 to 60 seconds, and then washing the galvanized steel sheet with water; and a neutralization treatment step of holding a surface of an oxide layer, which has been formed in the oxide layer forming step, in contact with an alkaline aqueous solution for 0.5 seconds or longer, and then performing washing with water and drying. The alkaline aqueous solution contains P ions at a P concentration of 0.01 g/L or more and carbonate ions at a carbonate ion concentration of 0.1 g/L or more.
    Type: Application
    Filed: February 27, 2015
    Publication date: December 22, 2016
    Inventors: Katsuya Hoshino, Shoichiro Taira, Masayasu Nagoshi, Kazutoshi Hanada
  • Patent number: 9512331
    Abstract: The present invention provides a chromium-free surface treatment agent, comprising: a resin compound having a specific bisphenol skeleton; cationic urethane resin emulsion; silane coupling agent; an organic titanium chelate compound; a quadrivalent vanadyl compound; a molybdic acid compound; and water, wherein these components are blended at predetermined ratios such that pH value of the surface treatment agent is in the range of 4 to 5. The one-pack type chromium-free surface treatment agent of the present invention exhibits good stability during storage and is capable of forming on a metal material surface a coating film excellent in corrosion resistance at a bending-processed portion of a steel sheet, solvent resistance and paintability after alkali degreasing.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: December 6, 2016
    Assignee: JFE STEEL CORPORATION
    Inventors: Toru Imokawa, Nobue Fujibayashi, Takahiro Kubota, Etsuo Hamada, Masayasu Nagoshi
  • Patent number: 9260774
    Abstract: An object of the present invention is to make it possible, without necessitating an alkali pretreatment, to form a zinc oxide layer having excellent sliding properties on a hot dip galvanized steel sheet not subjected to alloying after galvanizing and thus having a relatively low degree of surface activity. Another object of the present invention is to make it possible to manufacture a hot dip galvanized steel sheet having higher area ratio of Zn oxide layer formed on a coating surface and larger thickness of the Zn oxide layer.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: February 16, 2016
    Assignee: JFE Steel Corporation
    Inventors: Katsuya Hoshino, Takahiro Kubota, Masahiko Tada, Masayasu Nagoshi, Wataru Tanimoto, Hideo Kijima, Kazuhiko Higai
  • Publication number: 20160033416
    Abstract: The location where forsterite is present is checked in a region from which light excited by an electron beam is emitted when a material containing forsterite is irradiated with an electron beam. The material is preferably a grain oriented electrical steel sheet having a forsterite layer. In addition, it is preferable that the accelerating voltage be 10 kV or more when an electron beam is radiated when the material is a grain oriented electrical steel sheet having a tension coating layer on the forsterite layer.
    Type: Application
    Filed: March 24, 2014
    Publication date: February 4, 2016
    Inventors: Masayasu Nagoshi, Takako Yamashita, Yukio Usui, Shigehiro Takajo, Kazuhiro Hanazawa
  • Publication number: 20160024660
    Abstract: There is provided a method for manufacturing a galvanized steel sheet that has low sliding resistance in press forming and good degreasing property even under severe alkaline degreasing treatment conditions due to low temperature and short process line length. An oxide layer formed on the surface of a galvanized steel sheet is subjected to neutralization treatment using an alkaline aqueous solution containing 0.01 g/L or more of P ions and 0.01 g/L or more of colloid dispersed particles, wherein the alkaline aqueous solution preferably contains at least one phosphorus compound selected from phosphates, pyrophosphates, and triphosphates and at least one type of colloid dispersed particles selected from Ti, silica, Pt, Pd, Zr, Ag, Cu, Au, and Mg.
    Type: Application
    Filed: January 14, 2014
    Publication date: January 28, 2016
    Applicant: JFE STEEL CORPORATION
    Inventors: Katsuya Hoshino, Shoichiro Taira, Wataru Tanimoto, Masayasu Nagoshi
  • Patent number: 9243334
    Abstract: This invention provides methods and apparatuses which can manufacture Si-containing cold rolled steel sheets exhibiting excellent chemical conversion properties even if a chemical conversion treatment solution is used at a lower temperature while minimally suppressing the generation of sludge as well as reducing running costs. The method includes steps of cold rolling a steel containing 0.5 to 3.0 mass % Si, continuously annealing the cold rolled steel sheet, pickling the surface of the continuously annealed cold rolled steel sheet, and repickling the surface of the pickled steel sheet with a non-oxidative acid. The repickling is performed such that a repickling solution is sampled continuously or periodically, an acid concentration in the sampled solution is measured, and the acid concentration in the repickling solution is regularly controlled within a prescribed concentration range.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: January 26, 2016
    Assignee: JFE STEEL CORPORATION
    Inventors: Tomohiro Matsushima, Masao Inose, Masayasu Nagoshi, Hiroyuki Masuoka, Shigeyuki Aizawa, Hisato Noro