Patents by Inventor Tae-Chul Kim

Tae-Chul Kim 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: 20220341017
    Abstract: Provided are a plated steel sheet and a method for manufacturing same, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al plating layer provided on at least one surface of the base steel sheet; and an Fe—Al inhibition layer provided between the base steel sheet and the Zn—Mg—Al plating layer. The plating layer comprises, by weight %, 4 to 10% of Mg and 5.1-25% of Al and the remainder being Zn and unavoidable impurities with respect to components not including iron (Fe) diffused from the base steel sheet. The plating layer comprises a 24-50% MgZn2 phase in phase fraction. In the MgZn2 phase, an Al single phase is present in the ratio of 1-30% relative to the cross-sectional area of the total MgZn2 phase.
    Type: Application
    Filed: September 24, 2020
    Publication date: October 27, 2022
    Applicants: POSCO, STEEL & CONVERGENCE TECHNOLOGY RESEARCH ASSOCIATION, POSCO COATED & COLOR STEEL CO., LTD.
    Inventors: Sung-Joo Kim, Kyung-Kwan Park, Moon-Hi Hong, Heung-Yun Kim, Tae-Yeul Park, Myung-Soo Kim, Il-Ryoung Sohn, Tae-Chul Kim, Dae-Young Kang
  • Publication number: 20220251695
    Abstract: A plated steel wire, according to one aspect of the present invention, comprises: a base steel wire; and a zinc alloy plated layer. The zinc alloy plated layer comprises, in percentage by weight: 1.0% to 3.0% of AI; 1.0% to 2.0% of Mg; 0.5% to 5.0% of Fe; and the balance being Zn and unavoidable impurities, and includes a Zn/MgZn2/AI ternary eutectic structure, a Zn single-phase structure, and an Fe—Zn-AI-based crystal structure, wherein the Fe—Zn-AI-based crystal structure is formed adjacent to the base steel wire, and can have an average thickness of ? to ½ with respect to an average thickness of the zinc alloy plated layer.
    Type: Application
    Filed: June 26, 2019
    Publication date: August 11, 2022
    Applicants: POSCO, KISWIRE LTD., HONGDUK INDUSTRIAL CO., LTD.
    Inventors: Tae-Chul Kim, Jong-Sung Kim, Sung-Hoon Kang, Gwang-Weon Yu, Il-Ryoung Sohn, Jong-Sang Kim
  • Publication number: 20220251696
    Abstract: The present disclosure relates to a plated steel material that can be used in an automobile, a household appliance, a building material, and the like, and more particularly, to a zinc alloy plated steel material having excellent surface quality and corrosion resistance, and a method for manufacturing the same.
    Type: Application
    Filed: April 26, 2022
    Publication date: August 11, 2022
    Applicant: POSCO
    Inventors: Il-Ryoung SOHN, Tae-Chul KIM, Jung-Kuk KIM, Kyung-Jin AN, Jung-Hoon KIM, Jong-Un JUNG, Jin-Seo PARK
  • Patent number: 11396691
    Abstract: Provided is an alloy-plated steel material that can be used in home appliances, automobiles, and construction materials and the like and, more particularly, to an alloy-plated steel material having excellent corrosion resistance and high surface quality.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: July 26, 2022
    Assignee: POSCO
    Inventors: Il-Ryoung Sohn, Jong-Sang Kim, Tae-Chul Kim, Jung-Kuk Kim
  • Publication number: 20220195575
    Abstract: Provided are a hot-dip zinc plated steel material and a method for preparing same, the hot-dip zinc plated steel material comprising: base iron comprising 0.01-1.6 wt % of Si and 1.2-3.1 wt % of Mn; a Zn—Al—Mg alloy plating layer; and an Al-rich layer formed on the interface of the base iron and Zn—Al—Mg alloy plating layer, wherein the rate of occupied surface area of the Al-rich layer is 70% or higher (including 100%).
    Type: Application
    Filed: March 15, 2022
    Publication date: June 23, 2022
    Applicant: POSCO
    Inventors: Il-Ryoung Sohn, Dae-Young Kang, Jong-Sang Kim, Tae-Chul Kim, Min-Suk Oh
  • Patent number: 11332816
    Abstract: Provided is a plated steel material which can be used for an automobile, a household appliance, a building material, and the like and, more specifically, to a zinc alloy plated steel material having excellent surface quality and corrosion resistance, and a method for manufacturing the same.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: May 17, 2022
    Assignee: POSCO
    Inventors: Il-Ryoung Sohn, Tae-Chul Kim, Jung-Kuk Kim, Kyung-Jin An, Jung-Hoon Kim, Jong-Un Jung, Jin-Seo Park
  • Patent number: 11306381
    Abstract: Provided are a hot-dip zinc plated steel material and a method for preparing same, the hot-dip zinc plated steel material comprising: base iron comprising 0.01-1.6 wt % of Si and 1.2-3.1 wt % of Mn; a Zn—Al—Mg alloy plating layer; and an Al-rich layer formed on the interface of the base iron and Zn—Al—Mg alloy plating layer, wherein the rate of occupied surface area of the Al-rich layer is 70% or higher (including 100%).
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: April 19, 2022
    Assignee: POSCO
    Inventors: Il-Ryoung Sohn, Dae-Young Kang, Jong-Sang Kim, Tae-Chul Kim, Min-Suk Oh
  • Patent number: 11248287
    Abstract: Zn alloy plated steel material having excellent weldability and processed-part corrosion resistance and a method for production of Zn alloy plated steel material are provided. In the Zn alloy plated steel material comprising base steel material and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.1-5.0%, Mg: 0.1-5.0%, as well as a remainder of Zn and inevitable impurities. The Zn alloy plated steel material includes a lower interface layer and an upper interface layer between the base steel material and the Zn alloy plating layer, wherein the lower interface layer is formed on the base steel material and has a dense structure, and the upper interface layer is formed on the lower interface layer and has a network-type or island-type structure.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: February 15, 2022
    Assignee: POSCO
    Inventors: Min-Suk Oh, Sang-Heon Kim, Tae-Chul Kim, Jong-Sang Kim, Hyun-Chu Yun, Bong-Hwan Yoo, Il-Ryoung Sohn
  • Patent number: 10907243
    Abstract: A plated steel material includes a plated layer containing, by wt %: 0.5 to 14% of Al, 0.5 to 5% of Mg, and the balance being Zn and inevitable impurities. The plated steel material satisfies the following Equation: ([Mg]S?[Mg]1/2)/[Mg]1/2?0.3. [Mg]S means a content (wt %) of Mg in a surface of the plated layer, and [Mg]1/2 means a content (wt %) of Mg at a ½t position (t represents a thickness of the plated layer) from the surface of the plated layer in a thickness direction.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: February 2, 2021
    Assignee: POSCO
    Inventors: Min-Suk Oh, Jong-Sang Kim, Il-Ryoung Sohn, Tae-Chul Kim
  • Publication number: 20210010123
    Abstract: Provided is a plated steel material which can be used for an automobile, a household appliance, a building material, and the like and, more specifically, to a zinc alloy plated steel material having excellent surface quality and corrosion resistance, and a method for manufacturing the same.
    Type: Application
    Filed: December 13, 2018
    Publication date: January 14, 2021
    Inventors: Il-Ryoung SOHN, Tae-Chul KIM, Jung-Kuk KIM, Kyung-Jin AN, Jung-Hoon KIM, Jong-Un JUNG, Jin-Seo PARK
  • Publication number: 20210002751
    Abstract: Provided is a plated steel material which can be used for an automobile, a household appliance, a building material, and the like and, more particularly, to a zinc alloy plated steel material having excellent corrosion resistance after being processed and a method for manufacturing the same.
    Type: Application
    Filed: December 13, 2018
    Publication date: January 7, 2021
    Inventors: Il-Ryoung SOHN, Tae-Chul KIM, Jong-Sang KIM
  • Publication number: 20200377989
    Abstract: Provided is an alloy-plated steel material that can be used in home appliances, automobiles, and construction materials and the like and, more particularly, to an alloy-plated steel material having excellent corrosion resistance and high surface quality.
    Type: Application
    Filed: December 22, 2017
    Publication date: December 3, 2020
    Inventors: Il-Ryoung SOHN, Jong-Sang KIM, Tae-Chul KIM, Jung-Kuk KIM
  • Publication number: 20200157672
    Abstract: Zn alloy plated steel material having excellent weldability and processed-part corrosion resistance and a method for production of Zn alloy plated steel material are provided. In the Zn alloy plated steel material comprising base steel material and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.1-5.0%, Mg: 0.1-5.0%, as well as a remainder of Zn and inevitable impurities. The Zn alloy plated steel material includes a lower interface layer and an upper interface layer between the base steel material and the Zn alloy plating layer, wherein the lower interface layer is formed on the base steel material and has a dense structure, and the upper interface layer is formed on the lower interface layer and has a network-type or island-type structure.
    Type: Application
    Filed: January 27, 2020
    Publication date: May 21, 2020
    Inventors: Min-Suk OH, Sang-Heon KIM, Tae-Chul KIM, Jong-Sang KIM, Hyun-Chu YUN, Bong-Hwan YOO, Il-Ryoung SOHN
  • Patent number: 10584407
    Abstract: Zn alloy plated steel material having excellent weldability and processed-part corrosion resistance and a method for production of Zn alloy plated steel material are provided. In the Zn alloy plated steel material comprising base steel material and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.1-5.0%, Mg: 0.1-5.0%, as well as a remainder of Zn and inevitable impurities. The Zn alloy plated steel material includes a lower interface layer and an upper interface layer between the base steel material and the Zn alloy plating layer, wherein the lower interface layer is formed on the base steel material and has a dense structure, and the upper interface layer is formed on the lower interface layer and has a network-type or island-type structure.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: March 10, 2020
    Assignee: POSCO
    Inventors: Min-Suk Oh, Sang-Heon Kim, Tae-Chul Kim, Jong-Sang Kim, Hyun-Chu Yun, Bong-Hwan Yoo, Il-Ryoung Sohn
  • Patent number: 10550457
    Abstract: Zn alloy plated steel material having excellent weldability and processed-part corrosion resistance and a method for production of Zn alloy plated steel material are provided. In the Zn alloy plated steel material comprising base steel material and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.1-5.0%, Mg: 0.1-5.0%, as well as a remainder of Zn and inevitable impurities. The Zn alloy plated steel material includes a lower interface layer and an upper interface layer between the base steel material and the Zn alloy plating layer, wherein the lower interface layer is formed on the base steel material and has a dense structure, and the upper interface layer is formed on the lower interface layer and has a network-type or island-type structure.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: February 4, 2020
    Assignee: POSCO
    Inventors: Min-Suk Oh, Sang-Heon Kim, Tae-Chul Kim, Jong-Sang Kim, Hyun-Chu Yun, Bong-Hwan Yoo, Il-Ryoung Sohn
  • Patent number: 10544497
    Abstract: A Zn alloy plated steel sheet having excellent phosphatability and spot weldability and a method for manufacturing the same are provided. In the Zn alloy plated steel sheet including a base steel sheet and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.5-2.8%, Mg: 0.5-2.8%, and a remainder of Zn and inevitable impurities, and a cross-sectional structure of the Zn alloy plating layer includes, by area percentage, more than 50% of a Zn single phase structure and less than 50% of a Zn—Al—Mg-based intermetallic compound. A surface structure of the Zn alloy plating layer includes, by area percentage, 40% or less of a Zn single phase structure and 60% or more of a Zn—Al—Mg-based intermetallic compound.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: January 28, 2020
    Assignee: POSCO
    Inventors: Min-Suk Oh, Sang-Heon Kim, Tae-Chul Kim, Jong-Sang Kim, Bong-Hwan Yoo, Hyun-Chu Yun
  • Publication number: 20200017947
    Abstract: Provided is a Zn—Al—Mg-based alloy-plated steel material that can be used in automobiles and home appliances and the like and, more particularly, to a Zn—Al—Mg-based alloy-plated steel material that can suppress the generation of cracks in a plating layer that are generated during processing.
    Type: Application
    Filed: December 21, 2017
    Publication date: January 16, 2020
    Inventors: Il-Ryoung SOHN, Tae-Chul KIM, Jong-Sang KIM
  • Publication number: 20190100831
    Abstract: A Zn alloy plated steel sheet having excellent phosphatability and spot weldability and a method for manufacturing the same are provided. In the Zn alloy plated steel sheet including a base steel sheet and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.5-2.8%, Mg: 0.5-2.8%, and a remainder of Zn and inevitable impurities, and a cross-sectional structure of the Zn alloy plating layer includes, by area percentage, more than 50% of a Zn single phase structure and less than 50% of a Zn—Al—Mg-based intermetallic compound. A surface structure of the Zn alloy plating layer includes, by area percentage, 40% or less of a Zn single phase structure and 60% or more of a Zn—Al—Mg-based intermetallic compound.
    Type: Application
    Filed: December 24, 2015
    Publication date: April 4, 2019
    Inventors: Min-Suk OH, Sang-Heon KIM, Tae-Chul KIM, Jong-Sang KIM, Bong-Hwan YOO, Hyun-Chu YUN
  • Publication number: 20190010595
    Abstract: A plated steel material includes a plated layer containing, by wt %: 0.5 to 14% of Al, 0.5 to 5% of Mg, and the balance being Zn and inevitable impurities. The plated steel material satisfies the following Equation: ([Mg]S?[Mg]1/2)/[Mg]1/2?0.3. [Mg]S means a content (wt %) of Mg in a surface of the plated layer, and [Mg]1/2 means a content (wt %) of Mg at a ½t position (t represents a thickness of the plated layer) from the surface of the plated layer in a thickness direction.
    Type: Application
    Filed: December 16, 2016
    Publication date: January 10, 2019
    Inventors: Min-Suk OH, Jong-Sang KIM, Il-Ryoung SOHN, Tae-Chul KIM
  • Publication number: 20180371596
    Abstract: Provided are a hot-dip zinc plated steel material and a method for preparing same, the hot-dip zinc plated steel material comprising: base iron comprising 0.01-1.6 wt % of Si and 1.2-3.1 wt % of Mn; a Zn—Al—Mg alloy plating layer; and an Al-rich layer formed on the interface of the base iron and Zn—Al—Mg alloy plating layer, wherein the rate of occupied surface area of the Al-rich layer is 70% or higher (including 100%).
    Type: Application
    Filed: December 21, 2016
    Publication date: December 27, 2018
    Inventors: Il-Ryoung SOHN, Dae-Young KANG, Jong-Sang KIM, Tae-Chul KIM, Min-Suk OH