Patents by Inventor Ei OKUMURA

Ei OKUMURA 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: 20230407447
    Abstract: Provided is a galvanized steel sheet with excellent resistance to cracking in resistance welding at a welded portion, even if crystal orientations of an Fe-based electroplating layer and a cold-rolled steel sheet are integrated at a high ratio at the interface between the Fe-based electroplating layer and the cold-rolled steel sheet. The galvanized steel sheet has a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % to 3.0 mass %; an Fe-based electroplating layer formed on at least one surface of the Si-containing cold-rolled steel sheet with a coating weight per surface of more than 20.0 g/m2, and a galvanized layer formed on the Fe-based electroplating layer, where crystal orientations of the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet are integrated at a ratio of more than 50 % at the interface between the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet.
    Type: Application
    Filed: November 5, 2021
    Publication date: December 21, 2023
    Applicant: JFE STEEL CORPORATION
    Inventors: Shunsuke YAMAMOTO, Katsutoshi TAKASHIMA, Mai AOYAMA, Yusuke OKUMURA, Tomomi KANAZAWA, Katsuya HOSHINO, Hiroshi MATSUDA, Ei OKUMURA, Yoichi MAKIMIZU, Masaki KOBA
  • Publication number: 20230407506
    Abstract: Provided is a steel sheet with excellent resistance to cracking in resistance welding at a welded portion, even if the crystal orientations of an Fe-based electroplating layer and a Si-containing cold-rolled steel sheet are integrated at a high ratio at the interface between the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet. Provided is an Fe-based electroplated steel sheet having a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less; and an Fe-based electroplating layer formed on at least one surface of the Si-containing cold-rolled steel sheet with a coating weight per surface of more than 20.0 g/m2, where the crystal orientations of the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet are integrated at a ratio of more than 50% at the interface between the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet.
    Type: Application
    Filed: November 5, 2021
    Publication date: December 21, 2023
    Applicant: JFE STEEL CORPORATION
    Inventors: Shunsuke YAMAMOTO, Katsutoshi TAKASHIMA, Mai AOYAMA, Yusuke OKUMURA, Tomomi KANAZAWA, Katsuya HOSHINO, Hiroshi MATSUDA, Ei OKUMURA, Yoichi MAKIMIZU, Masaki KOBA
  • Publication number: 20230407485
    Abstract: Provided is an alloyed galvanized steel sheet with excellent resistance to cracking in resistance welding at a welded portion, even if crystal orientations of an Fe-based electroplating layer and a cold-rolled steel sheet are integrated at a high ratio at the interface between the Fe-based electroplating layer and the cold-rolled steel sheet. The alloyed galvanized steel sheet has a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % to 3.0 mass %; an Fe-based electroplating layer formed on at least one surface of the Si-containing cold-rolled steel sheet with a coating weight per surface exceeding 20.0 g/m2, and an alloyed galvanized layer formed on the Fe-based electroplating layer, where crystal orientations of the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet are integrated at a ratio of more than 50% at the interface between the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet.
    Type: Application
    Filed: November 5, 2021
    Publication date: December 21, 2023
    Applicant: JFE STEEL CORPORATION
    Inventors: Shunsuke YAMAMOTO, Katsutoshi TAKASHIMA, Mai AOYAMA, Yusuke OKUMURA, Tomomi KANAZAWA, Katsuya HOSHINO, Hiroshi MATSUDA, Ei OKUMURA, Yoichi MAKIMIZU, Masaki KOBA