Patents by Inventor Jun-Hak Pak

Jun-Hak Pak 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: 20240018619
    Abstract: According to one aspect of the present invention, a hot-rolled steel sheet and a manufacturing method for same may be provided, wherein the hot-rolled steel sheet has excellent yield strength, vibration damping ratio, and low-temperature toughness, and thus has physical properties suitable for use in a hyper train tube.
    Type: Application
    Filed: December 3, 2021
    Publication date: January 18, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Hong-Seok Yang, Jun-Hak Pak, Seok-Jong Seo
  • Publication number: 20230416861
    Abstract: Provided are a hot rolled steel having small compressive strength loss after being processed into a steel pipe, and a manufacturing method therefor. The hot rolled steel of the present invention comprises, by wt %, 0.15% or less of carbon (C), 2.5% or less of silicon (Si), 2.0% or less of manganese (Mn), 0.05% or less of aluminum (Al), nitrogen (N) and boron (B) in a sum of 0.002 to 0.008%, and a balance of Fe and inevitable impurities, wherein 250<450C+95Si+70Mn is satisfied, a microstructure is a mixed structure of ferrite and pearlite, the average grain size of the ferrite is 8 to 25 ?m, and a value defined by relation 1 is less than 20%.
    Type: Application
    Filed: November 18, 2021
    Publication date: December 28, 2023
    Applicant: POSCO Co., Ltd
    Inventors: Jun-Hak Pak, Hong-Seok Yang, Hak-Jun Kim, Seok-Jong Seo