Patents by Inventor Katsumi Nakajime

Katsumi Nakajime 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: 20150013853
    Abstract: A hot-rolled steel sheet for a generator rim contains a structure containing a ferrite phase with an areal ratio of 95% or more in which precipitates containing Ti and V whose average grain diameter is less than 10 nm are precipitated in crystal grains of the ferrite phase. The ferrite phase has an average crystal grain diameter within the range of 2 ?m or more and less than 10 ?m. The hot-rolled steel sheet for a generator rim has strength with a yield strength YS in a rolling direction of 700 MPa or more and electromagnetic properties with a magnetic flux density B50 of 1.5 T or more and a magnetic flux density B100 of 1.6 T or more.
    Type: Application
    Filed: January 30, 2013
    Publication date: January 15, 2015
    Applicant: JFE STEEL CORPORATION
    Inventors: Nobuyuki Nakamura, Katsumi Nakajime, Yoshimasa Funakawa, Kazutaka Okimoto, Takahiko Ogura