Patents by Inventor Yosuke UKAWA

Yosuke UKAWA 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: 11634807
    Abstract: A zinc-plated steel sheet for hot stamping according to an aspect of the present invention includes a steel substrate and a plated layer provided on a surface of the steel substrate, in which the steel substrate contains, in % by mass, C: 0.10 to 0.5%, Si: 0.7 to 2.5%, Mn: 1.0 to 3%, and Al: 0.01 to 0.5%, with the balance being iron and inevitable impurities, and the steel substrate has, in the inside thereof, an internal oxide layer consists of an oxide containing at least one of Si and Mn having a thickness of 1 ?m or more, and a decarburized layer having a thickness of 20 ?m or less from an interface with the plated layer toward an internal direction of the steel substrate.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: April 25, 2023
    Assignee: Kobe Steel, Ltd.
    Inventors: Takatoshi Yoshida, Yosuke Ukawa
  • Publication number: 20200407833
    Abstract: A zinc-plated steel sheet for hot stamping according to an aspect of the present invention includes a steel substrate and a plated layer provided on a surface of the steel substrate, in which the steel substrate contains, in % by mass, C: 0.10 to 0.5%, Si: 0.7 to 2.5%, Mn: 1.0 to 3%, and Al: 0.01 to 0.5%, with the balance being iron and inevitable impurities, and the steel substrate has, in the inside thereof, an internal oxide layer consists of an oxide containing at least one of Si and Mn having a thickness of 1 ?m or more, and a decarburized layer having a thickness of 20 ?m or less from an interface with the plated layer toward an internal direction of the steel substrate.
    Type: Application
    Filed: February 6, 2019
    Publication date: December 31, 2020
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takatoshi YOSHIDA, Yosuke UKAWA