Patents by Inventor Keiji Kubushiro

Keiji Kubushiro 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: 20220205075
    Abstract: A method of manufacturing a TiAl alloy includes a casting step of melting and casting a TiAl alloy raw material which contains 42 at % or more and 45 at % or less of Al, 3 at % or more and 6 at % or less of Nb, 3 at % or more and 6 at % or less of V, 0.1 at % or more and 0.3 at % or less of B, and the balance being Ti and inevitable impurities, a hot forging step of hot forging the cast TiAl alloy by heating the cast TiAl alloy to a temperature range between 1200° C. or higher and 1350° C. or lower, and a thermal treatment step of holding the hot-forged TiAl alloy at a temperature range between 1220° C. or higher and 1300° C. or lower for a hour range between 1 hour or longer and 5 hours or shorter, applying a first thermal treatment to the hot-forged TiAl alloy, cooling the TiAl alloy subjected to the first thermal treatment to a temperature range between 1000° C. or higher and 1100° C. or lower at a cooling rate of 400° C.
    Type: Application
    Filed: October 13, 2021
    Publication date: June 30, 2022
    Applicant: IHI Corporation
    Inventor: Keiji KUBUSHIRO
  • Publication number: 20220023934
    Abstract: A TiAl alloy material for hot forging includes a TiAl alloy substrate formed of a TiAl alloy which contains 42 at % or more and 45 at % or less of Al, 3 at % or more and 6 at % or less of Nb, 3 at % or more and 6 at % or less of V, 0.1 at % or more and 0.3 at % or less of B, and the balance being Ti and inevitable impurities, an intermediate layer formed on a surface of the TiAl alloy substrate, and a titanium layer formed on a surface of the intermediate layer, wherein the intermediate layer is formed of a first layer which is formed on a side of the TiAl alloy substrate and is formed of the TiAl alloy which becomes ?-TiAl at a hot forging temperature range between 1200° C. or higher and 1350° C. or lower and a second layer that is formed on a side of the titanium layer and is formed of a ?-Ti material.
    Type: Application
    Filed: October 13, 2021
    Publication date: January 27, 2022
    Applicant: IHI Corporation
    Inventor: Keiji KUBUSHIRO
  • Publication number: 20220017995
    Abstract: A TiAl alloy contains 48 at % or more and 50 at % or less of Al, 1 at % or more and 3 at % or less of Nb, 0.3 at % or more and 1 at % or less of Zr, 0.05 at % or more and 0.3 at % or less of B, and the balance being Ti and inevitable impurities.
    Type: Application
    Filed: September 28, 2021
    Publication date: January 20, 2022
    Applicant: IHI Corporation
    Inventor: Keiji KUBUSHIRO
  • Publication number: 20220010410
    Abstract: A TiAl alloy contains 48 at % or more and 50 at % or less of Al, 3 at % or more and 5 at % or less of Nb, 0.1 at % or more and 0.3 at % or less of B, and the balance being Ti and inevitable impurities.
    Type: Application
    Filed: September 28, 2021
    Publication date: January 13, 2022
    Applicant: IHI Corporation
    Inventor: Keiji KUBUSHIRO
  • Publication number: 20220002854
    Abstract: A titanium aluminide alloy material for hot forging has a chemical composition including, by atom, aluminum of 38.0% or greater and 39.9% or less, niobium of 3.0% or greater and 5.0% or less, vanadium of 3.0% or greater and 4.0% or less, carbon of 0.05% or greater and 0.15% or less, and titanium and an inevitable impurity as a residue.
    Type: Application
    Filed: September 15, 2021
    Publication date: January 6, 2022
    Applicants: IHI Corporation, TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Keiji KUBUSHIRO, Yutaro OTA, Shin USUI, Masao TAKEYAMA, Hirotoyo NAKASHIMA
  • Publication number: 20210404042
    Abstract: A titanium aluminide alloy material for hot forging has a chemical composition including, by atom, aluminum of 43.0% or greater and 45.0% or less, niobium of 4.0% or greater and 6.0% or less, chromium of 1.5% or greater and 3.5% or less, and titanium and an inevitable impurity as a residue.
    Type: Application
    Filed: September 13, 2021
    Publication date: December 30, 2021
    Applicants: IHI Corporation, TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Keiji KUBUSHIRO, Yutaro OTA, Satoshi TAKAHASHI, Masao TAKEYAMA, Hirotoyo NAKASHIMA, Ryosuke YAMAGATA
  • Patent number: 11078563
    Abstract: A TiAl alloy for forging, contains 41 at % or more and 44 at % or less of Al, 4 at % or more and 6 at % or less of Nb, 4 at % or more and 6 at % or less of V, 0.1 at % or more and 1 at % or less of B, and the balance being Ti and inevitable impurities.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: August 3, 2021
    Assignee: IHI Corporation
    Inventors: Keiji Kubushiro, Satoshi Takahashi
  • Publication number: 20210162532
    Abstract: A method of bonding metal members includes a stacked body forming step of forming a stacked body by putting an insert material between a first metal member and a second metal member formed of carbide-containing Ni alloys or carbide-containing Fe alloys, and a solid phase diffusion bonding step of forming a metal member joint body by heating and pressurizing the stacked body to perform solid phase diffusion bonding, wherein the insert material contains Ni having a content higher than an Ni content of the first metal member and the second metal member when the first metal member and the second metal member are formed of the carbide-containing Ni alloys, and contains Fe or Ni having a content higher than an Fe content of the first metal member and the second metal member when the first metal member and the second metal member are formed of the carbide-containing Fe alloys.
    Type: Application
    Filed: January 19, 2021
    Publication date: June 3, 2021
    Applicant: IHI CORPORATION
    Inventors: Nagisa HOSOYA, Rie HARADA, Keiji KUBUSHIRO
  • Publication number: 20200362439
    Abstract: A TiAl alloy member for hot forging includes a substrate made of TiAl alloy, and an Al layer formed on a surface of the substrate, the Al layer containing Al as a main constituent and containing Ti.
    Type: Application
    Filed: June 17, 2020
    Publication date: November 19, 2020
    Applicant: IHI Corporation
    Inventors: Keiji KUBUSHIRO, Masanobu BABA, Yohei SAKAKIBARA, Yutaro OTA
  • Publication number: 20190106778
    Abstract: A TiAl alloy for forging, contains 41 at % or more and 44 at % or less of Al, 4 at % or more and 6 at % or less of Nb, 4 at % or more and 6 at % or less of V, 0.1 at % or more and 1 at % or less of B, and the balance being Ti and inevitable impurities.
    Type: Application
    Filed: December 7, 2018
    Publication date: April 11, 2019
    Applicant: IHI Corporation
    Inventors: Keiji KUBUSHIRO, Satoshi Takahashi
  • Publication number: 20130037524
    Abstract: An electrode applicable to discharge surface treatment is produced. This method is comprised of: kneading a composition including an electrically conductive mixed matter including a first powder obtained by at least any process selected from the group consisting of an atomizing method, a reduction method, and a carbonyl method and a second powder obtained by a crushing method, and a binder, the electrically conductive mixed matter including the second powder at a ratio of 10-65 weight %; injecting the kneaded composition into a mold to produce a green body; heating the green body so as to remove the binder from the green body; and sintering the green body excepting the binder.
    Type: Application
    Filed: April 27, 2011
    Publication date: February 14, 2013
    Applicant: IHI Corporation
    Inventors: Hiroki Yoshizawa, Mitsutoshi Watanabe, Hiroyuki Ochiai, Yukihiro Shimoda, Kyouhei Nomura, Keiji Kubushiro
  • Publication number: 20120156394
    Abstract: An electrode used in combination with an electric spark machine for surface treatment, is comprised of a mixed powder including a powder of aluminum at a ratio of 5-18 weight % to the total of the mixed powder or a powder of any metal selected from the group consisting of nickel, cobalt, and iron at a ratio of 5-40 weight % to the total of the mixed powder and a powder of titanium hydride, wherein the mixed powder is formed by molding and sintering into a structure so dimensioned as to be incorporated in the electric spark machine as an electrode therefor.
    Type: Application
    Filed: September 2, 2010
    Publication date: June 21, 2012
    Applicant: IHI Corporation
    Inventors: Hiroki Yoshizawa, Mitsutoshi Watanabe, Hidemi Ukai, Kyouhei Nomura, Yukihiro Shimoda, Hiroyuki Ochiai, Keiji Kubushiro