Patents by Inventor Ji Eon PARK

Ji Eon PARK 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: 11339460
    Abstract: Disclosed are a ferritic stainless steel capable of inhibiting high temperature oxidation through generation of an effective oxide scale, and manufacturing method thereof. The ferritic stainless steel excellent in oxidation resistance at high temperature according to an embodiment of the present disclosure includes, in percent (%) by weight of the entire composition, Cr: 10 to 30%, Si: 0.2 to 1.0%, Mn: 0.1 to 2.0%, W: 0.3 to 2.5%, Ti: 0.001 to 0.15%, Al: 0.001 to 0.1%, the remainder of iron (Fe) and other inevitable impurities, and satisfies a following equation (1).
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: May 24, 2022
    Assignee: POSCO
    Inventors: Il Chan Jung, Jin-Suk Kim, Han-Hyuk Go, Ji Eon Park
  • Publication number: 20220010392
    Abstract: A non-magnetic austenitic stainless steel includes, in percent (%) by weight of the entire composition, C: 0.01 to 0.05%, Si: 1.5% or less, Mn: 0.5 to 3.5%, Cr: 17.0 to 22.0%, Ni: 9.0 to 14.0%, Mo: 1.0% or less, Cu: 0.2 to 2.5%, N: 0.05 to 0.25%, the remainder of iron (Fe) and other inevitable impurities, and satisfies following Formulas (1) and (2). (1) 0?3*(Cr+Mo)+5*Si?65*(C+N)?2*(Ni+Mn)?27?5 and (2) 660?500*(C+N)?10*Cr?30*(Ni+Si+Mo+Cu)?0.
    Type: Application
    Filed: October 31, 2019
    Publication date: January 13, 2022
    Inventors: Kyung-Hun Kim, Ji Eon Park, Hak Kim, Hyung-Gu Kang, Ji Soo Kim
  • Publication number: 20210348249
    Abstract: Disclosed is a ferritic stainless steel with improved workability and high temperature strength through control of component composition and precipitate distribution, and a manufacturing method thereof. The ferritic stainless steel excellent in workability and high temperature strength according to an embodiment of the present disclosure includes, in percent (%) by weight of the entire composition, C: 0.0005 to 0.02%, N: 0.005 to 0.02%, Si: 0.01 to 1.0%, Mn: 0.01 to 1.2%, P: 0.001 to 0.05%, Cr: 10.0 to 25.0%, Mo: 1.5 to 3.0%, Nb: 0.3 to 0.7%, W: 0.5 to 2.0%, the remainder of iron (Fe) and other inevitable impurities, and the number of precipitates with an average diameter of 0.5 ?m or less is 105 pieces/mi or less.
    Type: Application
    Filed: August 22, 2019
    Publication date: November 11, 2021
    Inventors: Ji Eon PARK, Il Chan JUNG, Mi-Nam PARK
  • Publication number: 20210087660
    Abstract: Disclosed are a ferritic stainless steel capable of inhibiting high temperature oxidation through generation of an effective oxide scale, and manufacturing method thereof. The ferritic stainless steel excellent in oxidation resistance at high temperature according to an embodiment of the present disclosure includes, in percent (%) by weight of the entire composition, Cr: 10 to 30%, Si: 0.2 to 1.0%, Mn: 0.1 to 2.0%, W: 0.3 to 2.5%, Ti: 0.001 to 0.15%, Al: 0.001 to 0.1%, the remainder of iron (Fe) and other inevitable impurities, and satisfies a following equation (1).
    Type: Application
    Filed: September 6, 2018
    Publication date: March 25, 2021
    Inventors: Il Chan Jung, Jin-Suk Kim, Han-Hyuk Go, Ji Eon Park
  • Publication number: 20200197992
    Abstract: Provided are a ferrite-based stainless steel having improved heat radiation property and processability and method for preparing same. A ferritic stainless steel according to an embodiment of the disclosure, includes, in % by weight, carbon (C): 0.0005 to 0.02%, nitrogen (N): 0.005 to 0.02%, chromium (Cr): 10.0 to 17.0%, titanium (Ti): 0.02 to 0.30%, niobium (Nb): 0.10 to 0.60%, and the remainder of iron (Fe) and other inevitable impurities, and the ferritic stainless steel is plated with aluminum (Al) having a thickness of 5 to 50 ?m. Therefore, heat dissipation and workability of ferritic stainless steel may be improved by controlling ferritic stainless steel alloy composition, aluminum (Al) thickness and manufacturing method.
    Type: Application
    Filed: December 11, 2017
    Publication date: June 25, 2020
    Inventors: Ji Eon Park, Mi-Nam Park
  • Publication number: 20200087745
    Abstract: Provided are a ferritic stainless steel having an excellent strength and corrosion resistance to acid and a method of manufacturing the same. The ferritic stainless steel according to an embodiment of the present disclosure includes, by weight %, 0.1% to 0.2% of carbon (C), 0.005% to 0.05% of nitrogen (N), 0.01% to 0.5% of manganese (Mn), 12.0% to 19.0% of chrome, 0.01% to 0.5% of nickel (Ni), 0.3% to 1.5% of copper (Cu), the remainder iron (Fe) and other inevitable impurities, wherein a number of carbides having a diameter of 100 nm or more per unit area is 50 ea/100 ?m2 to 200 ea/100 ?m2.
    Type: Application
    Filed: December 6, 2017
    Publication date: March 19, 2020
    Inventors: Ji Eon PARK, Mi Nam PARK
  • Publication number: 20180179607
    Abstract: Provided is a ferritic stainless steel and method of manufacturing the same. The ferritic stainless steel comprises, by weight percent, 0.02% or less of carbon (C), 0.02% or less of nitrogen (N), 1.0% or less of silicon (Si), 1.20% or less of manganese (Mn), 0.05% or less of phosphorus (P), 10.0 to 25.0% of chromium (Cr), 0.5 to 2.0% of molybdenum (Mo), 0.01 to 0.30% of titanium (Ti), 0.30 to 0.70% of niobium (Nb), and the remainder consisting of iron (Fe) and other unavoidable impurities. The ferritic stainless steel comprises niobium (Nb) laves phase precipitate, and precipitate containing niobium (Nb) and carbon (C) or nitrogen (N), 30 to 70% of the precipitates are distributed in a region within 1 ?m from the grain boundaries, and the average particle size of the precipitates is 0.5 ?m or less.
    Type: Application
    Filed: February 18, 2016
    Publication date: June 28, 2018
    Applicant: POSCO
    Inventors: Ji Eon PARK, Ka Young CHOI, Mi Nam PARK