Patents by Inventor Junji Ishizaka

Junji Ishizaka 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).

  • Electrode for electroslag remelting and process of producing alloy using the same
    Patent number: 5524019
    Abstract: An object of the invention is to provide an ingot having improvement of and a prevention of occurrence of segregation when electroslag remelting method is used for producing a large size ingot and a super alloy which is sensitive to segregation. According to the present invention, the electrode for electroslag remelting method has a hole formed along an axial direction in the core of an electrode. Therefore, the molten pool is made shallow so that flat and segregation is prevented from occurring. Consequently, an ESR ingot of good quality is accomplished with an excellent surface and is free from segregation. Moreover, an electrode melting rate is increasing and efficiency is improved.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: June 4, 1996
    Assignee: The Japan Steel Works, Ltd.
    Inventors: Tomoo Takenouchi, Yoshiaki Ichinomiya, Junji Ishizaka, Junji Itagaki, Shuzo Ohhashi, Tsukasa Azuma, Yasuhiko Tanaka
  • Electrode for electroslag remelting and process of producing alloy using the same
    Patent number: 5487082
    Abstract: A process for producing a turbine rotor using an ingot in which segregation is prevented effectively when ESR is used to produce a large-sized ingot. A hole is formed along an axial direction in the core of an electrode. The molten pool is made shallow and flat and segregation is prevented from occurring. Consequently, an ESR ingot of good quality offering an excellent surface is obtainable as it is free from segregation. Moreover, an electrode melting rate is increased and efficiency is improved so that a high quality turbine can be manufactured from the ingot.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: January 23, 1996
    Assignee: The Japan Steel Works, Ltd.
    Inventors: Tomoo Takenouchi, Yoshiaki Ichinomiya, Junji Ishizaka, Junji Itagaki, Shuzo Ohhashi, Tsukasa Azuma, Yasuhiko Tanaka
  • Electrode for electroslag remelting and process of producing alloy using the same
    Patent number: 5444732
    Abstract: An object of the present invention is to provide an ingot wherein occurrence is prevented when an electroslag remelting method is used for producing a large ingot and which a super alloy is sensitive to segragation. According to the present invention, the electrode for electroslag remelting method has a hole formed along an axial direction in the core of an electrode. Therefore, the molten pool is made shallow so that flat and segregation is prevented from occurring. Consequently, an ESR ingot of good quality is accomplished with an excellent surface and is free from segregation. Moreover, an electrode melting rate is increasing and efficiency is improved.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: August 22, 1995
    Assignee: The Japan Steel Works
    Inventors: Tomoo Takenouchi, Yoshiaki Ichinomiya, Junji Ishizaka, Junji Itagaki, Shuzo Ohhashi, Tsukasa Azuma, Yasuhiko Tanaka