Patents by Inventor Yasuto Goto

Yasuto Goto 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: 20240043980
    Abstract: A plated steel material having a plating layer having an average chemical composition containing, in mass %, Zn: more than 50.00%, Al: more than 15.0% and less than 30.0%, Mg: more than 5.0% and less than 15.0%, and Si: 0.25% or more and less than 3.50%, and impurities, and wherein a total amount (?A) of at least one selected from the group consisting of Sn, Bi and In is less than 1.00%, a total amount (?B) of at least one selected from the group consisting of Ca, Y, La, Ce and Sr is 0.02% or more and less than 0.60%, 2.0?SMg/Si<20.0 (Formula 1), 3.0?Si/?B<24.0 (Formula 2), and 26.0?(Si/?B)×(Mg/Si)<375.0 (Formula 3) are satisfied, and in an X-ray diffraction pattern of the surface of the plating layer, a diffraction intensity ratio R1 defined by R1={I(16.18°)+I(32.69°)}/I(27.0°) (Formula 4) satisfies 2.5<R1 (Formula 5) is used.
    Type: Application
    Filed: November 30, 2021
    Publication date: February 8, 2024
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kohei TOKUDA, Mamoru SAITO, Takuya MITSUNOBU, Tetsuya TOBA, Yasuto GOTO, Atsushi MORISHITA, Yasuaki KAWAMURA, Fumiaki NAKAMURA, Koji KAWANISHI
  • Publication number: 20230415453
    Abstract: The surface-treated steel sheet includes an alloy layer containing Ni and Co. In a case where, in a cross section obtained by cutting the alloy layer in the thickness direction, a range having a width of 2000 nm and extending from the surface of the alloy layer to a depth of 100 nm is partitioned into regions each having a width of 100 nm and a depth of 100 nm, within the range the alloy layer includes a plurality of high Co concentration regions in each of which the ratio of a Co concentration to a sum of the Co concentration and a Ni concentration within the partitioned region is 0.8 or more, and a plurality of alloyed regions in each of which a ratio of the Co concentration to a sum of the Co concentration and the Ni concentration within the partitioned region is less than 0.8.
    Type: Application
    Filed: November 29, 2021
    Publication date: December 28, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kosuke KAWAMOTO, Yasuto GOTO
  • Patent number: 11851764
    Abstract: The plated steel material is a plated steel material including a steel material and a plating layer provided on the surface of the steel material, wherein the plating layer has a predetermined average chemical composition, when the amount of Mg is % Mg and the amount of Al is % Al, % Mg/% Al is 0.80 or more, and a metal structure in a total field of view of 25,000 ?m2 in a vertical cross section which is a cross section in a thickness direction of the plating layer includes 10 to 40 area % of a MgZn2 phase, 10 to 30 area % of an Al—Zn phase with a Zn content of 10% or more, 0 to 15 area % of an Al phase with a Zn content of less than 10%, and 25 area % or more of an Al/MgZn2/Zn ternary eutectic structure.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: December 26, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kotaro Ishii, Kohei Tokuda, Yoshinari Ishida, Yasuto Goto, Mamoru Saito
  • Publication number: 20230407510
    Abstract: A surface-treated steel sheet includes a steel sheet, and an Ni—Co—Fe alloy layer containing Ni, Co, and Fe on the steel sheet surface. In the thickness direction of the Ni—Co—Fe alloy layer, a Co concentration in the Ni—Co—Fe alloy layer is highest at a position which is on an outermost surface side of the Ni—Co—Fe alloy layer relative to a position where the Ni concentration is highest in the Ni—Co—Fe alloy layer, and which is between the outermost surface of the Ni—Co—Fe alloy layer and a depth of 100 nm from the outermost surface. In the Ni—Co—Fe alloy layer, an Ni-concentrated region in which the Ni concentration increases toward the outermost surface of the Ni—Co—Fe alloy layer is formed between the outermost surface of the Ni—Co—Fe alloy layer and the position where the Co concentration is highest.
    Type: Application
    Filed: November 29, 2021
    Publication date: December 21, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Yasuto GOTO, Kosuke KAWAMOTO, Yuta DAIROKUNO, Yuji KAJII, Koki SHIMADA
  • Publication number: 20230407509
    Abstract: A surface-treated steel sheet of the present disclosure includes a steel sheet, and an alloy layer containing Ni and Co on a surface of the steel sheet. A surface roughness Ra1 of the surface of the alloy layer over a sampling length of 5.0 mm in the width direction of the steel sheet is 2.0 ?m or less. Ra2 that denotes the arithmetic mean height of a roughness curve of the surface of the alloy layer over a sampling length of 10 ?m in the width direction of the steel sheet is 20 nm or less, and RSm that denotes the mean length of roughness curve elements over the sampling length of 10 ?m in the width direction of the steel sheet is 700 nm or more, Ra2 and RSm being measured using an atomic force microscope.
    Type: Application
    Filed: November 29, 2021
    Publication date: December 21, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kosuke KAWAMOTO, Yasuto GOTO, Yuta DAIROKUNO, Koki SHIMADA
  • Patent number: 11827996
    Abstract: A Ni diffusion-plated steel sheet of the present invention includes a base steel sheet and a Fe—Ni diffusion alloy-plating layer positioned on at least one surface of the base steel sheet, a Ni coating weight of the Fe—Ni diffusion alloy-plating layer is 9.0 to 35 g/m2, a Fe concentration Cs of an outermost layer of the Fe—Ni diffusion alloy-plating layer is 10 to 55 mass %, the base steel sheet has a predetermined chemical composition, and a ferrite grain size number specified by JIS G 0551 (2013) of the base steel sheet is 10.0 or more.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: November 28, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Takehiro Takahashi, Kiyokazu Ishizuka, Yasuto Goto
  • Patent number: 11827984
    Abstract: A coated steel product including a base steel, and a coating layer containing a Zn—Al—Mg alloy layer disposed on a surface of the base steel, in which the coating layer has a predetermined chemical composition, the coated steel product including dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less on a surface of the Zn—Al—Mg alloy layer, an area ratio of the dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less being from 30% to 80% within a region of an observable field of view of 5 mm2, and among the dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less, a number of dendrite-shaped MgZn2 phase having an area of 0.1 mm2 or more being from 5 to 100 within a region of an observable field of view of 25 mm2.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: November 28, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Mamoru Saito, Yasuto Goto
  • Patent number: 11794449
    Abstract: A surface-treated steel sheet of the present invention includes a base steel sheet and a Ni—Co—Fe alloy-plated layer on at least one surface of the base steel sheet, in which, in the alloy-plated layer, a Ni coating weight is 7.1 to 32.5 g/m2, a Co coating weight is 0.65 to 5.2 g/m2, and a total of the Ni coating weight and the Co coating weight is in a range of 9.0 to 35.0 g/m2. In an outermost layer of the alloy-plated layer, a Co concentration is in a range of 20 to 60 atom %, and a Fe concentration is in a range of 5 to 30 atom %. In the alloy-plated layer, a region having a thickness of 2 ?m or more, in which a total of a Ni concentration and the Co concentration is 10 atom % or more and the Fe concentration is 5 atom % or more, is present, and the base steel sheet has a predetermined chemical composition, and a ferrite grain size number is 9.0 or more.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: October 24, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Takehiro Takahashi, Mamoru Saito, Kiyokazu Ishizuka, Yasuto Goto
  • Patent number: 11787156
    Abstract: A coated steel material including: a base steel, and a coating layer containing a Zn—Al—Mg alloy layer disposed on a surface of the base steel, wherein the coating layer has a predetermined chemical composition, and, in a backscattered electron image of the Zn—Al—Mg alloy layer that is obtained at a time of observing the surface of the Zn—Al—Mg alloy layer after polishing to ½ of the layer thickness, under a scanning electron microscope at a magnification of 100×, Al crystals are present, and the average value of the cumulative circumferential length of the Al crystals is 88 to 195 mm/mm2.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: October 17, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Mamoru Saito, Yasuto Goto, Kiyokazu Ishizuka
  • Publication number: 20230323521
    Abstract: A coated steel product including a base steel, and a coating layer containing a Zn—Al—Mg alloy layer disposed on a surface of the base steel, in which the coating layer has a predetermined chemical composition, the coated steel product including dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less on a surface of the Zn—Al—Mg alloy layer, an area ratio of the dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less being from 30% to 80% within a region of an observable field of view of 5 mm2, and among the dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less, a number of dendrite-shaped MgZn2 phase having an area of 0.1 mm2 or more being from 5 to 100 within a region of an observable field of view of 25 mm2.
    Type: Application
    Filed: September 29, 2021
    Publication date: October 12, 2023
    Inventors: Mamoru SAITO, Yasuto GOTO
  • Patent number: 11781200
    Abstract: A plated steel including a plated layer on a surface of a steel, in which Expression 1 of 0?Cr+Ti+Ni+Co+V+Nb+Cu+Mn?0.25 and Expression 2 of 0?Sr+Sb+Pb+B+Li+Zr+Mo+W+Ag+P?0.50 are satisfied, and Expression 3 of I(MgZn2 (41.31°))/I?(MgZn2)?0.265 and Expression 6 of 0.150?{I(MgZn2 (20.79°))+I(MgZn2 (42.24°))}/I?(MgZn2) are further satisfied in an X-ray diffraction pattern of a surface of the plated layer measured using Cu-K? rays under a condition that an X-ray output is 40 kV and 150 mA.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: October 10, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kohei Tokuda, Takuya Mitsunobu, Mamoru Saito, Yuto Fukuda, Yasuto Goto, Hidetoshi Shindo, Fumiaki Nakamura, Koji Kawanishi, Ryohei Mimura
  • Patent number: 11773503
    Abstract: A Ni-plated steel sheet includes a base steel sheet and a Ni-based coating layer that is disposed on a surface of the base steel sheet. The Ni-based coating layer includes a Fe—Ni alloy region that is formed on the surface of the base steel sheet. The Fe—Ni alloy region includes a mixed phase composed of a bcc phase and an fcc phase, and a component of the Fe—Ni alloy region includes 5 mass % or more of Fe and a remainder including 90 mass % or more of Ni.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: October 3, 2023
    Assignee: Nippon Steel Corporation
    Inventors: Yasuto Goto, Kiyokazu Ishizuka, Takehiro Takahashi
  • Publication number: 20230304136
    Abstract: The plated steel material is a plated steel material including a steel material and a plating layer provided on the surface of the steel material, wherein the plating layer has a predetermined average chemical composition, when the amount of Mg is % Mg and the amount of Al is % Al, % Mg/% Al is 0.80 or more, and a metal structure in a total field of view of 25,000 ?m2 in a vertical cross section which is a cross section in a thickness direction of the plating layer includes 10 to 40 area % of a MgZn2 phase, 10 to 30 area % of an Al—Zn phase with a Zn content of 10% or more, 0 to 15 area % of an Al phase with a Zn content of less than 10%, and 25 area % or more of an Al/MgZn2/Zn ternary eutectic structure.
    Type: Application
    Filed: November 18, 2021
    Publication date: September 28, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kotaro ISHII, Kohei TOKUDA, Yoshinari ISHIDA, Yasuto GOTO, Mamoru SAITO
  • Publication number: 20230275292
    Abstract: A novel battery container that can be obtained by welding plated steel sheets, has sufficient sealing ability over a long period of time, and is able to keep the base material of the plated steel sheets from being exposed and eluting into the electrolyte solution is provided. That is, a battery case comprised of a container body and a container lid, wherein the container body and the container lid are each comprised of a plated steel sheet, a joint part between the container and the container lid is comprised of a plating welded part containing a main constituent component of the plating of the plated steel sheet in 60 mass% or more and a steel sheet welded part containing the main constituent component of the plating in less than 60 mass%, and the plating welded part has a length of 0.5 µm or more and less than 1.0 mm in a joint longitudinal direction.
    Type: Application
    Filed: October 4, 2021
    Publication date: August 31, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Akinobu KOBAYASHI, Takehiro TAKAHASHI, Yasuto GOTO
  • Publication number: 20230193425
    Abstract: A plated steel including a plated layer on a surface of a steel, in which Expression 1 of 0?Cr+Ti+Ni+Co+V+Nb+Cu+Mn 0.25 and Expression 2 of 0?Sr+Sb+Pb+B+Li+Zr+Mo+W+Ag+P?0.50 are satisfied, and Expression 3 of I(MgZn2 (41.31°))/I?(MgZn2)?0.265 and Expression 6 of 0.150?{I(MgZn2 (20.79°))+I(MgZn2 (42.24°))}/I?(MgZn2) are further satisfied in an X-ray diffraction pattern of a surface of the plated layer measured using Cu-K? rays under a condition that an X-ray output is 40 kV and 150 mA.
    Type: Application
    Filed: July 9, 2021
    Publication date: June 22, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kohei TOKUDA, Takuya MITSUNOBU, Mamoru SAITO, Yuto FUKUDA, Yasuto GOTO, Hidetoshi SHINDO, Fumiaki NAKAMURA, Koji KAWANISHI, Ryohei MIMURA
  • Patent number: 11634791
    Abstract: A hot-dip coated steel product including: a steel product; and a coating layer including a Zn—Al—Mg alloy layer disposed on a surface of the steel product, in which the Zn—Al—Mg alloy layer includes a Zn phase, an Al phase, and a MgZn2 phase, and contains a Mg—Sn intermetallic compound phase in the Zn phase, and the coating layer has a chemical composition satisfying a predetermined average composition, a total area proportion of the Al phase and the MgZn2 phase is 70% or more, an area proportion of the Zn phase is 30% or less, an average value of cumulative circumferential lengths of the Al phase is less than 88 mm/mm2, and a total frequency in number of the Al phase having a circumferential length of 50 ?m or more is less than 100.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: April 25, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kohei Tokuda, Mamoru Saito, Jun Maki, Takuya Mitsunobu, Yasuto Goto
  • Publication number: 20230105625
    Abstract: A Ni-plated steel sheet according to one aspect of the present invention includes a base steel sheet and a Ni plating layer provided on a surface of the base steel sheet, the Ni plating layer has a Ni—Fe alloy layer formed on a surface of the base steel sheet, and a ratio of a Zn content to a Ni content in the Ni plating layer is 0.0005% to 0.10%. A manufacturing method of the Ni-plated steel sheet according to one aspect of the present invention has electroplating a base steel sheet using a Ni plating bath in which [Zn2+]/[Ni2+] is set to 0.0005% to 0.10% to obtain a material Ni-plated steel sheet, and annealing the material Ni-plated steel sheet.
    Type: Application
    Filed: March 1, 2021
    Publication date: April 6, 2023
    Inventors: Kosuke KAWAMOTO, Yasuto GOTO
  • Patent number: 11618965
    Abstract: A Ni-plated steel sheet according to an aspect of the present invention includes: a base steel sheet; an Fe—Ni diffusion alloy region disposed on the base steel sheet; and a Ni plating region disposed on the Fe—Ni diffusion alloy region, in which an average equivalent circle diameter of crystal grains made of Ni (fcc) in the Ni plating region measured in a cross section perpendicular to a rolled surface of the base steel sheet is 0.2 to 4.0 ?m.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: April 4, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Yasuto Goto, Kiyokazu Ishizuka, Takehiro Takahashi
  • Publication number: 20230072743
    Abstract: A Ni-plated steel sheet according to one aspect of the present invention includes a base steel sheet; and a Ni plating layer provided on a surface of the base steel sheet, wherein the Ni plating layer includes a Ni—Fe alloy layer formed on the surface of the base steel sheet, and a ratio of a Sn content to a Ni content in the Ni plating layer is 0.0005% to 0.10%.
    Type: Application
    Filed: March 1, 2021
    Publication date: March 9, 2023
    Inventors: Yasuto GOTO, Kiyokazu ISHIZUKA, Tatsuo NAGATA, Katsumasa MATSUMOTO
  • Publication number: 20220403542
    Abstract: A Ni-plated steel sheet includes a base steel sheet and a Ni-based coating layer that is disposed on a surface of the base steel sheet. The Ni-based coating layer includes a Fe—Ni alloy region that is formed on the surface of the base steel sheet. The Fe—Ni alloy region includes a mixed phase composed of a bcc phase and an fcc phase, and a component of the Fe—Ni alloy region includes 5 mass % or more of Fe and a remainder including 90 mass % or more of Ni.
    Type: Application
    Filed: December 20, 2019
    Publication date: December 22, 2022
    Inventors: Yasuto GOTO, Kiyokazu ISHIZUKA, Takehiro TAKAHASHI