Patents by Inventor Yong-Hwa Jung

Yong-Hwa Jung 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: 20210213710
    Abstract: Provided are an alloy coating steel plate and a method of manufacturing the same, and in this case, the alloy coating steel plate includes a steel, and an Al—Mg—Si alloy layer positioned on the steel plate, wherein the Al—Mg—Si alloy layer is formed to include Mg—Si alloy grains in an alloy layer configured in an Al—Mg alloy phase.
    Type: Application
    Filed: March 30, 2021
    Publication date: July 15, 2021
    Inventors: Ji Hoon YANG, Jae In JEONG, Yong Hwa JUNG, Tae Yeob KIM
  • Patent number: 10988845
    Abstract: Provided is a plated steel sheet often used as materials for vehicles, home appliances, construction and the like and, more specifically, to a plated steel sheet having a multilayer structure and a method for manufacturing the same.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 27, 2021
    Assignee: POSCO
    Inventors: Kyoung-Pil Ko, Kyung-Hoon Nam, Tae-Yeob Kim, Dong-Yoeul Lee, Yong-Hwa Jung, Woo-Sung Jung
  • Publication number: 20210017640
    Abstract: Provided is an apparatus and a method that is capable of performing continuous coating at a constant coating composition and rate. One embodiment is a deposition apparatus for coating two or more compounds or elements on a substrate, the apparatus comprising: a supply unit for supplying the two or more compounds or elements to a plurality of solid bodies; a heating unit for melting and evaporating the solid bodies supplied from the supply unit to form vapor; a buffer unit, connected to the heating unit, in which the vapor stays and is mixed with previously generated vapor; and a nozzle connected to the buffer unit and having an opening toward the substrate.
    Type: Application
    Filed: October 19, 2018
    Publication date: January 21, 2021
    Inventors: Kyung-Hoon NAM, Yong-Hwa JUNG, Mun-Jong EOM, Tae-Yeob KIM, Kyoung-Pil KO, Woo-Sung JUNG
  • Publication number: 20200385854
    Abstract: Provided is an alloy-coated steel sheet and a manufacturing method thereof. The alloy-coated steel sheet includes: a steel sheet; and an Al—Mg—Si alloy layer disposed on the steel sheet, wherein the Al—Mg—Si alloy layer has a form in which Mg—Si alloy grains are included in an alloy layer consisting of an Al—Mg alloy phase.
    Type: Application
    Filed: May 18, 2018
    Publication date: December 10, 2020
    Inventors: Ji Hoon YANG, Jae In JEONG, Yong Hwa JUNG, Tae Yeob KIM
  • Publication number: 20200180272
    Abstract: Provided is an alloy coating steel plate including: a steel plate; a plating layer including Al positioned on one surface or opposite surfaces of the steel plate; and a coating layer positioned on the plating layer. The coating layer is divided into two or three layers. The coating layer includes a phase of one of Al, Si, and Mg or an alloy phase including two or more thereof.
    Type: Application
    Filed: February 13, 2020
    Publication date: June 11, 2020
    Inventors: Ji Hoon YANG, Jae In JEONG, Yong Hwa JUNG, Tae Yeob KIM
  • Publication number: 20200080205
    Abstract: Provided is a plated steel sheet often used as materials for vehicles, home appliances, construction and the like and, more specifically, to a plated steel sheet having a multilayer structure and a method for manufacturing the same.
    Type: Application
    Filed: December 21, 2017
    Publication date: March 12, 2020
    Inventors: Kyoung-Pil KO, Kyung-Hoon NAM, Tae-Yeob KIM, Dong-Yoeul LEE, Yong-Hwa JUNG, Woo-Sung JUNG
  • Publication number: 20200002803
    Abstract: Provided is a multilayer zinc alloy plated steel material comprising a base steel material and multiple plating layers formed on the base steel material, wherein each of the multiple plating layers includes one of a Zn plating layer, a Mg plating layer, and a Zn—Mg alloy plating layer, and the ratio of the weight of Mg contained in the multiple plating layers to the total weight of the multiple plating layers is from 0.13 to 0.24.
    Type: Application
    Filed: December 22, 2017
    Publication date: January 2, 2020
    Inventors: Young-Jin KWAK, Goo-Hwa KIM, Mun-Jong EOM, Seok-Jun HONG, Kyoung-Pil KO, Yong-Hwa JUNG, Dong-Yoeul LEE, Tae-Yeob KIM, Kyung-Hoon NAM
  • Patent number: 10196736
    Abstract: Provided are a heating apparatus configured to generate a coating vapor for coating a base metal (steel sheet) which is continuously transferred in a vacuum state, and a coating device including the heating apparatus. A coating material to be converted into a coating vapor is initially supplied in a solid phase (solid state) and then phase changed into a liquid (liquid state). Thereafter, the liquid-state coating material is supplied to a heating unit, thereby preventing problems such as equipment erosion occurring when a liquid coating material is directly supplied and preventing the decrease of the temperature of a coating material when a solid wire is supplied as a coating material. As a result, the energy efficiency of the heating apparatus may be maximized.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: February 5, 2019
    Assignee: POSCO
    Inventors: Yong-Hwa Jung, Kyung-Hoon Nam, Mun-Jong Eom, Woo-Sung Jung, Seok-Jun Hong, Young-Jin Kwak, Tae-Yeob Kim, Dong-Yoeul Lee
  • Publication number: 20190001623
    Abstract: Provided are an alloy coating steel plate and a method of manufacturing the same, and in this case, the alloy coating steel plate includes a steel, and an Al—Mg—Si alloy layer positioned on the steel plate, wherein the Al—Mg—Si alloy layer is formed to include Mg—Si alloy grains in an alloy layer configured in an Al—Mg alloy phase.
    Type: Application
    Filed: December 23, 2016
    Publication date: January 3, 2019
    Applicants: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Ji Hoon YANG, Jae In JEONG, Yong Hwa JUNG, Tae Yeob KIM
  • Patent number: 10106866
    Abstract: An exemplary embodiment of the present invention provides a coated steel sheet on which a magnesium-aluminum alloy coating layer is formed, including: a steel sheet; and a coating layer configured to include a first magnesium-aluminum alloy layer formed on a top surface of the steel sheet and a second magnesium-aluminum alloy layer formed on a top surface of the first magnesium-aluminum alloy layer, wherein a magnesium content of the first magnesium-aluminum alloy layer is higher than that of the second magnesium-aluminum alloy layer.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: October 23, 2018
    Assignees: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Jae In Jeong, Ji Hoon Yang, Tae Yeob Kim, Yong Hwa Jung
  • Patent number: 9982342
    Abstract: The present invention relates to a Zn—Mg alloy-coated steel sheet with excellent blackening resistance and excellent coating adhesion and to a method for manufacturing same. Provided are a Zn—Mg alloy-coated steel sheet with excellent blackening resistance and excellent adhesion and a method for manufacturing same, the steel sheet comprising: a substrate steel sheet; a Zn—Fe intermetallic compound layer formed on the substrate steel sheet; a first Zn—Mg coating layer formed on the Zn—Fe intermetallic compound layer and comprising a Zn—Fe intermetallic compound in which the content of Zn is 95% by weight or higher; a second Zn—Mg coating layer formed on the first Zn—Mg coating layer and comprising a Zn—Mg intermetallic compound in which the content of Zn is 80 to 95% by weight; and an oxide film formed on the second Zn—Mg coating layer and comprising a metallic oxide.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: May 29, 2018
    Assignee: POSCO
    Inventors: Dong-Yoeul Lee, Kyung-Hoon Nam, Yong-Hwa Jung, Seok-Jun Hong, Tae-Yeob Kim, Young-Jin Kwak, Mun-Jong Eom, Woo-Sung Jung
  • Patent number: 9957619
    Abstract: A phosphate solution for a zinc or zinc-based alloy plated steel sheet, and a zinc or zinc-based alloy plated steel sheet using the same are provided. The phosphate solution for a zinc or zinc-based alloy plated steel sheet contains a molybdenum (Mo) ion, a calcium (Ca) ion and a phosphate ion. A zinc or zinc-based alloy plated steel sheet includes a base steel sheet, a zinc-based or zinc alloy-based plating layer formed on the base steel sheet, and a phosphate film formed on the zinc-based or zinc alloy-based plating layer. The phosphate film contains a molybdenum compound, Ca and a phosphate. A pitting phenomenon occurring at the time of treating a steel sheet with a phosphate is prevented, and excellent corrosion resistance is exhibited on a phosphate film.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: May 1, 2018
    Assignee: POSCO
    Inventors: Young-Jin Kwak, Kyung-Hoon Nam, Yong-Hwa Jung, Tae-Yeob Kim, Dong-Yoeul Lee, Seok-Won Cho, Young-Ra Lee, Mun-Jong Eom, Woo-Sung Jung, Seok-Jun Hong, Jae-Kyu Min, Hong-Kyun Sohn
  • Patent number: 9744743
    Abstract: Provided are a Zn—Mg alloy plated steel sheet and a method for manufacturing same. The Zn—Mg alloy plated steel sheet comprises a base steel sheet and a Zn—Mg plating layer formed on the base steel sheet, wherein the content of Mg in the Zn—Mg plating layer is 8 weight % or less (provided that 0 weight % is excluded), and the Zn—Mg plating layer is a compound phase of Zn and Mg2Zn11. According to the present invention, provided are a Zn—Mg alloy plated steel sheet and a method for manufacturing the same, wherein the Zn—Mg alloy plated steel sheet has excellent corrosion resistance, high adhesion, and superior surface quality of metallic luster.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: August 29, 2017
    Assignee: POSCO
    Inventors: Woo-Sung Jung, Seok-Jun Hong, Kyung-Hoon Nam, Dong-Yoeul Lee, Yong-Hwa Jung, Young-Jin Kwak, Mun-Jong Eom, Tae-Yeob Kim
  • Patent number: 9732423
    Abstract: Provided is a dry coating apparatus for coating a coating material, i.e., deposition vapor (metal vapor) on a substrate (a steel strip). The dry coating apparatus includes a coating part disposed in a vacuum to coat deposition vapor generated through heating and evaporation of a supplied coating material onto a proceeding object to be coated and a heating source disposed in an atmosphere to heat and levitate the coating material in the coating part.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: August 15, 2017
    Assignee: POSCO
    Inventors: Kyung-Hoon Nam, Mun-Jong Eom, Young-Jin Kwak, Woo-Sung Jung, Tae-Yeob Kim, Dong-Yoeul Lee, Seok-Jun Hong, Kyoung-Bo Kim, Yong-Hwa Jung, Sang-Hoon Park, Sang-Cheol Lee, Yang-Woo Nam
  • Publication number: 20160355926
    Abstract: The present invention relates to a Zn—Mg alloy-coated steel sheet with excellent blackening resistance and excellent coating adhesion and to a method for manufacturing same. Provided are a Zn—Mg alloy-coated steel sheet with excellent blackening resistance and excellent adhesion and a method for manufacturing same, the steel sheet comprising: a substrate steel sheet; a Zn—Fe intermetallic compound layer formed on the substrate steel sheet; a first Zn—Mg coating layer formed on the Zn—Fe intermetallic compound layer and comprising a Zn—Fe intermetallic compound in which the content of Zn is 95% by weight or higher; a second Zn—Mg coating layer formed on the first Zn—Mg coating layer and comprising a Zn—Mg intermetallic compound in which the content of Zn is 80 to 95% by weight; and an oxide film formed on the second. Zn—Mg coating layer and comprising a metallic oxide.
    Type: Application
    Filed: August 16, 2016
    Publication date: December 8, 2016
    Inventors: Dong-Yoeul LEE, Kyung-Hoon NAM, Yong-Hwa JUNG, Seok-Jun HONG, Tae-Yeob KIM, Young-Jin KWAK, Mun-Jong EOM, Woo-Sung JUNG
  • Publication number: 20160326607
    Abstract: An exemplary embodiment of the present invention provides a coated steel sheet on which a magnesium-aluminum alloy coating layer is formed, including: a steel sheet; and a coating layer configured to include a first magnesium-aluminum alloy layer formed on a top surface of the steel sheet and a second magnesium-aluminum alloy layer formed on a top surface of the first magnesium-aluminum alloy layer, wherein a magnesium content of the first magnesium-aluminum alloy layer is higher than that of the second magnesium-aluminum alloy layer.
    Type: Application
    Filed: December 17, 2014
    Publication date: November 10, 2016
    Applicants: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Jae In JEONG, Ji Hoon YANG, Tae Yeob KIM, Yong Hwa JUNG
  • Publication number: 20160312356
    Abstract: Provided are a heating apparatus for generating coating steam (gas) for deposition coating of a continuously moving base material (steel plate), and a coating machine having the heating apparatus. According to the present invention, a liquid-state supply scheme is adopted, and a supplied solid-state coating substance is contained inside a nozzle means and then heated such that a liquid-state coating substance is supplied to a heating unit; accordingly, smooth and stable generation of coating steam is made possible, preheating and supply of a solid-state coating substance is additionally implemented, and clogging of a supply tube is prevented, thereby ultimately improving the coating quality of a fast moving steel plate or the workability.
    Type: Application
    Filed: December 19, 2013
    Publication date: October 27, 2016
    Applicant: POSCO
    Inventors: Yong-Hwa JUNG, Woo-Sung JUNG, Kyung-Hoon NAM, Mun-Jong EOM, Seok-Jun HONG, Young-Jin KWAK, Tae-Yeob KIM, Dong-Yoeul LEE
  • Patent number: 9441302
    Abstract: Provided is a method for manufacturing a Zn—Mg alloy-coated steel sheet having high blackening resistance and coating adhesion. In one implementation, the method may include forming a Zn—Mg coating layer on a base steel sheet and performing a combustion chemical vapor deposition (CCVD) process to form an oxide film. The oxide film may include a metal oxide and the metal oxide may include silicon oxide (SiO2) and magnesium oxide (MgO). The base steel sheet may be maintained within a temperature range of 330° C. to 450° C. during the performing of the CCVD process.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: September 13, 2016
    Assignee: POSCO
    Inventors: Dong-Yoeul Lee, Kyung-Hoon Nam, Yong-Hwa Jung, Seok-Jun Hong, Tae-Yeob Kim, Young-Jin Kwak, Mun-Jong Eom, Woo-Sung Jung
  • Patent number: 9382630
    Abstract: There is provided a zinc alloy coated steel sheet including a vacuum deposited layer capable of improving corrosion resistance and sealer adhesion that are suitable for the use in automobiles, and a process of manufacturing the same. The zinc alloy coated steel sheet includes a zinc coating layer formed on a steel sheet; and a zinc/metal alloy deposited layer formed on the zinc coating layer, wherein the zinc coating layer, and a metal diffusion layer is present in the zinc coating layer.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: July 5, 2016
    Assignee: POSCO
    Inventors: Young-Jin Kwak, Dong-Yoeul Lee, Kyung-Hoon Nam, Sang-Cheol Lee, Yong-Hwa Jung, Woo-Sung Jung, Sang-Hoon Park, Tae-Yeob Kim, Gwang-Seok Kim
  • Patent number: 9296903
    Abstract: Provided is a film formation composition for improving the blackening of the surface of a steel sheet, particularly, the surface of a steel sheet containing Mg on the surface thereof, such as a Mg sheet, a plated steel sheet having a plated layer comprising Mg, and the like, a steel sheet comprising a film formed by the composition, and a method for forming the film. Provided are a film formation composition for preventing the blackening of the surface of the steel sheet, comprising: 2.5-7.5 parts by weight of a water-soluble phenoxy resin; 0.1-0.5 parts by weight of a fluorometal acid; 0.1-0.5 parts by weight of a metal compound; and 1-5 parts by weight of a cross-linking agent.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: March 29, 2016
    Assignees: POSCO, NOROO COIL COATINGS CO., LTD.
    Inventors: Young-Jin Kwak, Dong-Yun Kim, Woo-Sung Jung, Kyung-Hoon Nam, Dong-Yoeul Lee, Seok-Jun Hong, Tae-Yeob Kim, Yong-Hwa Jung, Mun-Jong Eom, Myoung-Hee Choi, Gab-Yong Kim, Sang-Hoon Park, Sang-Cheol Lee, Yang-Woo Nam