Patents by Inventor Toyoichiro Higashi

Toyoichiro Higashi 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).

  • Billet by continuous casting and manufacturing method for the same
    Patent number: 6905558
    Abstract: A billet produced by continuous casting having little central segregation, in particular a billet of high carbon steel produced by continuous casting, and a manufacturing method therefor are provided. In the continuous casting billet, the size of the dendritic equiaxed crystal in a billet central portion is reduced to be not more than 6 mm. For this purpose, electromagnetic stirring is performed so that the inclining angle of the primary dendrite within 10 mm of a billet surface layer is increased to be not less than 10°. Furthermore, the mechanical soft reduction is performed during continuous casting so that the diameter of the center porosity in the billet central portion is reduced to be not more than 4 mm. Thereby, in particular in the manufacturing of the continuous casting billet having a carbon content of not less than 0.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: June 14, 2005
    Assignee: Nippon Steel Corporation
    Inventors: Shigenori Tanaka, Toyoichiro Higashi, Masahiro Doki, Jun Fukuda, Hiroshi Ohba, Mitsuo Uchimura
  • Billet by continuous casting and manufacturing method for the same
    Publication number: 20030070786
    Abstract: A billet produced by continuous casting having little central segregation, in particular a billet of high carbon steel produced by continuous casting, and a manufacturing method therefor are provided. In the continuous casting billet, the size of the dendritic equiaxed crystal in a billet central portion is reduced to be not more than 6 mm. For this purpose, electromagnetic stirring is performed so that the inclining angle of the primary dendrite within 10 mm of a billet surface layer is increased to be not less than 10°. Furthermore, the mechanical soft reduction is performed during continuous casting so that the diameter of the center porosity in the billet central portion is reduced to be not more than 4 mm. Thereby, in particular in the manufacturing of the continuous casting billet having a carbon content of not less than 0.
    Type: Application
    Filed: November 6, 2002
    Publication date: April 17, 2003
    Inventors: Shigenori Tanaka, Toyoichiro Higashi, Masahiro Doki, Jun Fukuda, Hiroshi Ohba, Mitsuo Uchimura