Patents by Inventor Hyo Kyung SUNG

Hyo Kyung SUNG 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
  • Anti-buckling jig for fracture toughness test
    Patent number: 11906473
    Abstract: Disclosed is an anti-buckling jig of a fracture toughness test. The anti-buckling jig includes: a first jig unit provided in a form of surrounding one side surface of a specimen; a second jig unit provided in a form of surrounding the other side surface of the specimen; and a screw provided to allow the first jig unit and the second jig unit to be coupled to each other. During the fracture toughness test of the specimen, the first jig unit and the second jig unit simultaneously support both sides of the specimen, so that the specimen is cracked in a single direction.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: February 20, 2024
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION GYEONGSANG NATIONAL UNIVERSITY
    Inventors: Hyo Kyung Sung, Sang Sik Kim, Dae Ho Jung, Jun Hyuk Park, Kwan Ho 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
  • ANTI-BUCKLING JIG FOR FRACTURE TOUGHNESS TEST
    Publication number: 20210348996
    Abstract: Disclosed is an anti-buckling jig of a fracture toughness test. The anti-buckling jig includes: a first jig unit provided in a form of surrounding one side surface of a specimen; a second jig unit provided in a form of surrounding the other side surface of the specimen; and a screw provided to allow the first jig unit and the second jig unit to be coupled to each other. During the fracture toughness test of the specimen, the first jig unit and the second jig unit simultaneously support both sides of the specimen, so that the specimen is cracked in a single direction.
    Type: Application
    Filed: September 10, 2019
    Publication date: November 11, 2021
    Applicant: INDUSTRY-ACADEMIC COOPERATION FOUNDATION GYEONGSANG NATIONAL UNIVERSITY
    Inventors: Hyo Kyung SUNG, Sang Sik KIM, Dae Ho JUNG, Jun Hyuk PARK, Kwan Ho LEE