Patents by Inventor Kwang Gyu KOH

Kwang Gyu KOH 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).

  • Method for manufacturing ferritic lightweight steel and ferritic lightweight steel using same
    Patent number: 11952647
    Abstract: There is provided a ferritic lightweight steel which contains 2.0 to 3.0 wt % manganese (Mn), 5.0 to 6.0 wt % aluminum (Al) and 0.1 to 0.3 wt % carbon (C) and has a tensile strength of 900 MPa to 1,108 MPa. The lightweight steel includes ferrite-austenite dual grains as a result of performing low-temperature tempering-induced partitioning (LTP) at 300° C. for 10 minutes after isothermal annealing.
    Type: Grant
    Filed: November 11, 2021
    Date of Patent: April 9, 2024
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION GYEONGSANG NATIONAL UNIVERSITY
    Inventors: Jae Bok Seol, Hyo Ju Bae, Kwang Gyu Koh, Jung Gi Kim, Hyo Kyung Sung, Young Kook Lee
  • METHOD FOR MANUFACTURING FERRITIC LIGHTWEIGHT STEEL AND FERRITIC LIGHTWEIGHT STEEL USING SAME
    Publication number: 20230392238
    Abstract: There is provided a ferritic lightweight steel which contains 2.0 to 3.0 wt % manganese (Mn), 5.0 to 6.0 wt % aluminum (Al) and 0.1 to 0.3 wt % carbon (C) and has a tensile strength of 900 MPa to 1,108 MPa. The lightweight steel includes ferrite-austenite dual grains as a result of performing low-temperature tempering-induced partitioning (LTP) at 300° C. for 10 minutes after isothermal annealing.
    Type: Application
    Filed: November 11, 2021
    Publication date: December 7, 2023
    Applicant: INDUSTRY-ACADEMIC COOPERATION FOUNDATION GYEONGSANG NATIONAL UNIVERSITY
    Inventors: Jae Bok SEOL, Hyo Ju BAE, Kwang Gyu KOH, Jung Gi KIM, Hyo Kyung SUNG, Young Kook LEE