Patents by Inventor Shigenobu EGUCHI

Shigenobu EGUCHI 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: 12195828
    Abstract: The present invention relates to a Co-based alloy product including a polycrystal of a Co-based alloy, the Co-based alloy including: 0.001 mass %?C<0.100 mass %; 9.0 mass %?Cr<20.0 mass %; 2.0 mass %?Al<5.0 mass %; 13.0 mass %?W<20.0 mass %; and 39.0 mass %?Ni<55.0 mass %, with the balance being Co and unavoidable impurities, in which the Co-based alloy product comprises segregated cells formed inside a crystal grain of the polycrystal, the segregated cells have an average size of 1 ?m or larger and 100 ?m or smaller, and the segregated cells contain Al and Cr, and a method for producing the Co-based alloy product.
    Type: Grant
    Filed: September 27, 2022
    Date of Patent: January 14, 2025
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Shigenobu Eguchi, Shinya Imano, Atsuo Ota, Kenji Sugiyama, Yoshiki Kumagai
  • Patent number: 11925987
    Abstract: A metal powder manufacturing device includes: an atomization tank; a crucible in which a molten metal is stored; a molten metal nozzle that allows the molten metal stored in the crucible to flow downward into the atomization tank; and a fluid spraying nozzle including a plurality of spraying holes that spray a fluid to an atomization tank side end part of the molten metal nozzle to pulverize a molten metal flow flowing downward from the molten metal nozzle. The molten metal nozzle includes a molten metal nozzle body and an orifice part having an inside diameter equal to or smaller than an inside diameter of the molten metal nozzle body, and a material of the orifice part is harder than a material of the molten metal nozzle body.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: March 12, 2024
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takashi Shibayama, Shinya Imano, Shigenobu Eguchi
  • Patent number: 11712739
    Abstract: A metal powder production apparatus capable of easily preventing an oxide in a molten metal from entering a liquid nozzle is provided. The metal powder apparatus includes a first crucible heating and melting a melting material to generate molten metal, a first heating device heating and melting the metal in the first crucible, a stopper opening and closing a first opening provided on the bottom surface of the first crucible, an introduction pipe having one end connected to the first opening of the first crucible and leading a molten metal in the first crucible to the outside of the first crucible, a second crucible receiving the molten metal flowing out of the introduction pipe, a second heating device heating the second crucible, and a liquid nozzle provided on the bottom surface of the second crucible.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: August 1, 2023
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Takashi Shibayama, Shigenobu Eguchi, Shinya Imano
  • Patent number: 11674688
    Abstract: There is provided a gas turbine combustor which includes a burner component which is molded by 3D additive manufacturing and is optimized in material strength per part. The burner component includes a first part which is used within a first temperature range and/or a first stress range and a second part which is used within a second temperature range which is lower than the first temperature range and/or a second stress range which is lower than the first stress range, and a lamination speed at which a metal material is laminated on the first part by the 3D additive manufacturing is lower than a lamination speed at which the metal material is laminated on the second part.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: June 13, 2023
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Satoshi Kumagai, Yoshihide Wadayama, Shigenobu Eguchi
  • Publication number: 20230094413
    Abstract: The present invention relates to a Co-based alloy product including a polycrystal of a Co-based alloy, the Co-based alloy including: 0.001 mass %?C<0.100 mass %; 9.0 mass %?Cr<20.0 mass %; 2.0 mass %?Al<5.0 mass %; 13.0 mass %?W<20.0 mass %; and 39.0 mass %?Ni<55.0 mass %, with the balance being Co and unavoidable impurities, in which the Co-based alloy product comprises segregated cells formed inside a crystal grain of the polycrystal, the segregated cells have an average size of 1 ?m or larger and 100 ?m or smaller, and the segregated cells contain Al and Cr, and a method for producing the Co-based alloy product.
    Type: Application
    Filed: September 27, 2022
    Publication date: March 30, 2023
    Inventors: Shigenobu EGUCHI, Shinya Imano, Atsuo Ota, Kenji Sugiyama, Yoshiki Kumagai
  • Patent number: 11613795
    Abstract: There is provided a cobalt-based alloy product comprising: in mass %, 0.08-0.25% C; 0.1% or less B; 10-30% Cr; 5% or less Fe and 30% or less Ni, the total amount of Fe and Ni being 30% or less; W and/or Mo, the total amount of W and Mo being 5-12%; at least one of Ti, Zr, Hf, V, Nb and Ta, the total amount of Ti, Zr, Hf, V, Nb and Ta being 0.5-2%; 0.5% or less Si; 0.5% or less Mn; 0.003-0.04% N; and the balance being Co and impurities. The product is a polycrystalline body of matrix phase crystal grains. In the matrix phase crystal grains, post-segregation cells with an average size of 0.13-2 ?m are formed, wherein components constituting an MC type carbide phase comprising Ti, Zr, Hf, V, Nb and/or Ta are segregated along boundary regions of the post-segregation cells.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: March 28, 2023
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yuting Wang, Shinya Imano, Shigenobu Eguchi
  • Patent number: 11602789
    Abstract: A metal-powder producing apparatus includes a spray chamber, and a plurality of spray nozzles that liquid-spray a melted metal into the spray chamber. Each of the plurality of spray nozzles includes: a liquid nozzle that allows the melted metal to flow down into the spray chamber; and a gas-jet nozzle that has a plurality of gas-jet holes arranged around the liquid nozzle and causing a gas fluid to collide with the melted metal having flowed down from the liquid nozzle.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: March 14, 2023
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Takashi Shibayama, Shigenobu Eguchi, Yuting Wang, Shinya Imano
  • Patent number: 11499208
    Abstract: There is provided a cobalt-based alloy product comprising: in mass %, 0.08-0.25% C; 0.1% or less B; 10-30% Cr; 5% or less Fe and 30% or less Ni, the total amount of Fe and Ni being 30% or less; W and/or Mo, the total amount of W and Mo being 5-12%; 0.5% or less Si; 0.5% or less Mn; 0.003-0.04% N; 0.5 to 2 mass % of an M component being a transition metal other than W and Mo and having an atomic radius of more than 130 pm; and the balance being Co and impurities. The impurities include 0.5% or less Al and 0.04% or less O. The product is a polycrystalline body of matrix phase crystal grains. In the matrix phase crystal grains, segregation cells with an average size of 0.13-2 ?m are formed, in which the M component is segregated in boundary regions of the segregation cells.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: November 15, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yuting Wang, Shinya Imano, Shigenobu Eguchi
  • Patent number: 11414728
    Abstract: There is provided a cobalt-based alloy product comprising: in mass %, 0.08-0.25% C; 0.1% or less B; 10-30% Cr; 5% or less Fe and 30% or less Ni, the total amount of Fe and Ni being 30% or less; W and/or Mo, the total amount of W and Mo being 5-12%; at least one of Ti, Zr, Hf, V, Nb and Ta, the total amount of Ti, Zr, Hf, V, Nb and Ta being 0.5-2%; 0.5% or less Si; 0.5% or less Mn; 0.003-0.04% N; and the balance being Co and impurities. The cobalt-based alloy product is a polycrystalline body of matrix phase crystal grains, wherein MC type carbide phase grains are dispersively precipitated in the matrix phase crystal grains at an average intergrain distance of 0.13 to 2 ?m and M23C6 type carbide phase grains are precipitated on grain boundaries of the matrix phase crystal grains.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: August 16, 2022
    Inventors: Yuting Wang, Shinya Imano, Shigenobu Eguchi
  • Patent number: 11325189
    Abstract: There is provided an additive manufactured (AM) article formed of a Co based alloy having a composition comprising: in mass %, 0.08-0.25% C; 0.1% or less B; 10-30% Cr; 30% or less in total of Fe and Ni, the Fe being 5% or less; 5-12% in total of W and/or Mo; 0.5-2% in total of Ti, Zr, Nb and Ta; 0.5% or less Si; 0.5% or less Mn; 0.003-0.04% N; and the balance being Co and impurities. The AM article comprises crystal grains with an average size of 10-100 ?m. In the crystal grains, segregation cells with an average size of 0.15-1.5 ?m are formed, in which components constituting an MC type carbide phase comprising the Ti, Zr, Nb and/or Ta are segregated in boundary regions of the cells, and/or grains of the MC type carbide phase are precipitated at an average intergrain distance of 0.15-1.5 ?m.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: May 10, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shinya Imano, Yuting Wang, Shigenobu Eguchi, Yoshitaka Uemura, Norihiko Motoyama, Takanao Komaki
  • Patent number: 11298746
    Abstract: The metal powder producing apparatus includes: a first gas jet nozzle that includes jet holes disposed in a bottom surface of a gas jet device so as to form first rings each, and jets gas against molten metal flowing down through the liquid nozzles; a second gas jet nozzle that includes jet holes disposed in the bottom surface of the gas jet device so as to form second rings each on an outer side of a corresponding one of the first rings, and jets gas to prevent scatter of metal particles; and a third gas jet nozzle that includes jet holes disposed in the bottom surface of the gas jet device so as to form a third ring on an outer side of the second gas jet nozzle, and jets gas against an inner wall surface of the spray chamber.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: April 12, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Takashi Shibayama, Shinya Imano, Yuting Wang, Shigenobu Eguchi
  • Publication number: 20220080503
    Abstract: A metal powder producing apparatus includes a spray tank, and a plurality of spray nozzles that spray a molten metal into the spray tank. Each of the plurality of spray nozzles includes a molten metal nozzle allowing the molten metal to flow down into the spray tank, and a gas jet nozzle having a plurality of jet holes that are disposed in a periphery of the molten metal nozzle and jet a gas to the molten metal flowing down from the molten metal nozzle. Each of center axes of the plurality of jet holes is deviated to either one of left side and right side relative to a center axis of the molten metal nozzle. Each of the center axes of the plurality of jet holes and the center axis of the molten metal nozzle are located at skew positions.
    Type: Application
    Filed: August 6, 2021
    Publication date: March 17, 2022
    Applicant: MITSUBISHI POWER, LTD.
    Inventors: Takashi SHIBAYAMA, Shigenobu EGUCHI
  • Publication number: 20210404036
    Abstract: There is provided a cobalt-based alloy product comprising: in mass %, 0.08-0.25% C; 0.1% or less B; 10-30% Cr; 5% or less Fe and 30% or less Ni, the total amount of Fe and Ni being 30% or less; W and/or Mo, the total amount of W and Mo being 5-12%; at least one of Ti, Zr, Hf, V, Nb and Ta, the total amount of Ti, Zr, Hf, V, Nb and Ta being 0.5-2%; 0.5% or less Si; 0.5% or less Mn; 0.003-0.04% N; and the balance being Co and impurities. The product is a polycrystalline body of matrix phase crystal grains. In the matrix phase crystal grains, post-segregation cells with an average size of 0.13-2 ?m are formed, wherein components constituting an MC type carbide phase comprising Ti, Zr, Hf, V, Nb and/or Ta are segregated along boundary regions of the post-segregation cells.
    Type: Application
    Filed: March 7, 2019
    Publication date: December 30, 2021
    Applicant: MITSUBISHI POWER, LTD.
    Inventors: Yuting WANG, Shinya IMANO, Shigenobu EGUCHI
  • Publication number: 20210363615
    Abstract: There is provided a cobalt-based alloy product comprising: in mass %, 0.08-0.25% C; 0.1% or less B; 10-30% Cr; 5% or less Fe and 30% or less Ni, the total amount of Fe and Ni being 30% or less; W and/or Mo, the total amount of W and Mo being 5-12%; 0.5% or less Si; 0.5% or less Mn; 0.003-0.04% N; 0.5 to 2 mass % of an M component being a transition metal other than W and Mo and having an atomic radius of more than 130 pm; and the balance being Co and impurities. The impurities include 0.5% or less Al and 0.04% or less O. The product is a polycrystalline body of matrix phase crystal grains. In the matrix phase crystal grains, segregation cells with an average size of 0.13-2 ?m are formed, in which the M component is segregated in boundary regions of the segregation cells.
    Type: Application
    Filed: March 7, 2019
    Publication date: November 25, 2021
    Applicant: MITSUBISHI POWER, LTD.
    Inventors: Yuting WANG, Shinya IMANO, Shigenobu EGUCHI
  • Publication number: 20210340645
    Abstract: There is provided a cobalt-based alloy product comprising: in mass %, 0.08-0.25% C; 0.1% or less B; 10-30% Cr; 5% or less Fe and 30% or less Ni, the total amount of Fe and Ni being 30% or less; W and/or Mo, the total amount of W and Mo being 5-12%; at least one of Ti, Zr, Hf, V, Nb and Ta, the total amount of Ti, Zr, Hf, V, Nb and Ta being 0.5-2%; 0.5% or less Si; 0.5% or less Mn; 0.003-0.04% N; and the balance being Co and impurities. The cobalt-based alloy product is a polycrystalline body of matrix phase crystal grains, wherein MC type carbide phase grains are dispersively precipitated in the matrix phase crystal grains at an average intergrain distance of 0.13 to 2 ?m and M23C6 type carbide phase grains are precipitated on grain boundaries of the matrix phase crystal grains.
    Type: Application
    Filed: March 7, 2019
    Publication date: November 4, 2021
    Applicant: MITSUBISHI POWER, LTD.
    Inventors: Yuting WANG, Shinya IMANO, Shigenobu EGUCHI
  • Publication number: 20210302022
    Abstract: There is provided a gas turbine combustor which includes a burner component which is molded by 3D additive manufacturing and is optimized in material strength per part. The burner component includes a first part which is used within a first temperature range and/or a first stress range and a second part which is used within a second temperature range which is lower than the first temperature range and/or a second stress range which is lower than the first stress range, and a lamination speed at which a metal material is laminated on the first part by the 3D additive manufacturing is lower than a lamination speed at which the metal material is laminated on the second part.
    Type: Application
    Filed: January 12, 2021
    Publication date: September 30, 2021
    Inventors: Satoshi KUMAGAI, Yoshihide WADAYAMA, Shigenobu EGUCHI
  • Publication number: 20210178478
    Abstract: A metal powder manufacturing device includes: an atomization tank; a crucible in which a molten metal is stored; a molten metal nozzle that allows the molten metal stored in the crucible to flow downward into the atomization tank; and a fluid spraying nozzle including a plurality of spraying holes that spray a fluid to an atomization tank side end part of the molten metal nozzle to pulverize a molten metal flow flowing downward from the molten metal nozzle. The molten metal nozzle includes a molten metal nozzle body and an orifice part having an inside diameter equal to or smaller than an inside diameter of the molten metal nozzle body, and a material of the orifice part is harder than a material of the molten metal nozzle body.
    Type: Application
    Filed: February 8, 2019
    Publication date: June 17, 2021
    Applicant: MITSUBISHI POWER, LTD.
    Inventors: Takashi SHIBAYAMA, Shinya IMANO, Shigenobu EGUCHI
  • Patent number: 10857595
    Abstract: There is provided an additive manufactured (AM) article formed of a Co based alloy having a composition comprising: in mass %, 0.08-0.25% C; 0.1% or less B; 10-30% Cr; 30% or less in total of Fe and Ni, the Fe being 5% or less; 5-12% in total of W and/or Mo; 0.5-2% in total of Ti, Zr, Nb and Ta; 0.5% or less Si; 0.5% or less Mn; 0.003-0.04% N; and the balance being Co and impurities. The AM article comprises crystal grains with an average size of 10-100 ?m. In the crystal grains, segregation cells with an average size of 0.15-1.5 ?m are formed, in which components constituting an MC type carbide phase comprising the Ti, Zr, Nb and/or Ta are segregated in boundary regions of the cells, and/or grains of the MC type carbide phase are precipitated at an average intergrain distance of 0.15-1.5 ?m.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: December 8, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Shinya Imano, Yuting Wang, Shigenobu Eguchi, Yoshitaka Uemura, Norihiko Motoyama, Takanao Komaki
  • Patent number: D982627
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: April 4, 2023
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takashi Shibayama, Shigenobu Eguchi, Shinya Imano
  • Patent number: D982628
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: April 4, 2023
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takashi Shibayama, Shigenobu Eguchi, Shinya Imano