Patents by Inventor Heung-Yun KIM

Heung-Yun 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: 20220010420
    Abstract: Provided is a galvanized steel sheet having excellent plating adhesion, having a plated layer with improved friction characteristics by means of a predetermined level of Fe elution, and having excellent corrosion resistance; and a manufacturing method therefor.
    Type: Application
    Filed: November 27, 2019
    Publication date: January 13, 2022
    Inventors: Do-Kyeong HAN, Heung-Yun KIM
  • Publication number: 20210381091
    Abstract: Provided is a zinc alloy-plated steel material used in automobiles, building materials, home appliances, or the like, and more specifically, to a zinc alloy-plated steel material having excellent corrosion resistance and surface quality, and a method for producing same.
    Type: Application
    Filed: December 12, 2019
    Publication date: December 9, 2021
    Inventors: Heung-Yun KIM, Do-Kyeong HAN, Myung-Soo KIM
  • Patent number: 10968506
    Abstract: Provided is a high-manganese hot-dip aluminum-coated steel sheet comprising: a base steel sheet containing, by weight, 5% to 35% of Mn, 0.3 to 6% of Al, 0.1 to 1.2% of Si, the balanced amount of Fe, and inevitable impurities; a hot-dip aluminum-coated layer, formed on a surface of the base steel sheet, containing, by weight, 3 to 12% of Si and the balanced amount of Al, and inevitable impurities; and an alloy layer, 0.1 to 10 ?m in thickness with a Fe—Al—Si—Mn-based alloy phase on an interface between the base steel sheet and the hot-dip aluminum-coated layer, containing, by weight, 40 to 70% of Al, 2 to 13% of Si, 3 to 9% of Mn, the balance amount of Fe, and inevitable impurities.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: April 6, 2021
    Assignee: POSCO
    Inventors: Heung-Yun Kim, Hyeon-Seok Hwang, Young-Ha Kim
  • Publication number: 20210010106
    Abstract: Provided is a plated steel to be used for automobiles, electric home appliances, building materials and the like and, more specifically, to a zinc alloy-plated steel having excellent corrosion resistance and surface smoothness, and a method for manufacturing the same.
    Type: Application
    Filed: December 20, 2018
    Publication date: January 14, 2021
    Inventors: Heung-Yun KIM, Myung-Soo KIM
  • Patent number: 10837094
    Abstract: Provided is an aluminum-based alloy plate steel sheet, which comprises a base steel sheet, an interfacial alloy layer, and an aluminum-based plated layer comprising a Mg—Si-based alloy phase, and in which b/a is 1-5 when the area fraction of the Mg—Si-based alloy phase contained in the aluminum-based plated layer is a and the area fraction of the Mg—Si-based alloy phase contained in the region of the lower 20% in the thickness direction of the aluminum-based plated layer is b.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: November 17, 2020
    Assignee: POSCO
    Inventors: Heung-Yun Kim, Young-Ha Kim
  • Patent number: 10808292
    Abstract: Provided is a method of manufacturing an HPF part comprising: preparing a steel sheet comprising C: 0.18% to 0.25%, Si: 0.1% to 1.0%, Mn: 0.9% to 1.5%, P: 0.03% or less, S: 0.01% or less, Al: 0.01% to 0.05%, Cr: 0.05% to 0.5%, Ti: 0.01% to 0.05%, B: 0.001% to 0.005%, N: 0.009% or less, and a balance of Fe and impurities; heating the steel sheet at 550° C. to 850° C. followed by maintaining at 640° C. to 680° C., and immersing the steel sheet in a hot dip aluminum plating bath, and a balance of Al and impurities; cooling the plated steel sheet at 15° C./s or faster; heating the cooled hot dip aluminum plated steel sheet at 880° C. to 930° C. followed by maintaining for a certain time; and hot forming the alloyed hot dip aluminum plated steel sheet and quenching at a range of 300° C. or lower at the same time.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: October 20, 2020
    Assignee: POSCO
    Inventors: Il-Ryoung Sohn, Dae-Chul Bae, Heung-Yun Kim
  • Publication number: 20200262181
    Abstract: Provided are an austenite-based molten aluminum-plated steel sheet comprising: a steel plate which contains, by weight %, 0.3 to 0.9% of C, 12 to 25% of Mn, 0.5 to 2.5% of Si, 0.3 to 3.0% of Al, 0.01 to 0.5% of Ti, 0.05 to 0.5% of V, 0.01-0.5% of Mo, 0.01-0.2% of Sn, 0.001-0.1% of Co, and 0.001-0.1% of W, the remainder being Fe and unavoidable impurities; and a molten aluminum-based plated layer formed on a surface of the steel plate, and a method for producing the same.
    Type: Application
    Filed: December 22, 2016
    Publication date: August 20, 2020
    Inventors: Young-Ha KIM, Hyeon-Seok HWANG, Kwang-Geun CHIN, Heung-Yun KIM
  • Patent number: 10655204
    Abstract: Provided is a hot press formed article having good anti-delamination and having a hot dip aluminized layer formed on the surface of a base steel sheet. The base steel sheet comprises 0.18-0.25 wt % of C, 0.1-0.5 wt % of Si, 0.9-1.5 wt % of Mn, 0.03 wt % or less of P, 0.01 wt % or less of S, 0.01-0.05 wt % of Al, 0.05-0.5 wt % of Cr, 0.01-0.05 wt % of Ti, 0.001-0.005 wt % of B, 0.009 wt % or less of N and the balance of Fe and other impurities. The aluminized layer comprises a single soft diffusion layer comprising ?-Fe with solid-solubilized Al, and the hardness of the diffusion layer is 300-600 (Hv).
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: May 19, 2020
    Assignee: POSCO
    Inventor: Heung-Yun Kim
  • Patent number: 10640840
    Abstract: An HPF molding member having a melted aluminum plating layer formed on the surface of a base steel sheet and excellent delamination resistance. The base steel sheet comprises: 0.18-0.25% by weight of C; 0.1-1.0% by weight of Si; 0.9-1.5% by weight of Mn; 0.03% by weight or less of P; 0.01% by weight or less of S; 0.01-0.05% by weight of Al; 0.05-0.5% by weight of Cr; 0.01-0.05% by weight of Ti; 0.001-0.005% by weight of B; 0.009% by weight or less of N; and the balance Fe and other impurities. The plating layer consists of a soft diffusion layer and a hard alloy layer, the hard alloy layer having a tau layer irregularly and non-continuously dispersed and distributed on the inside thereof at 10% or more of the entire area fraction. The difference in hardness between the alloy layer and the diffusion layer is 400 (Hv) or less.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: May 5, 2020
    Assignee: POSCO
    Inventors: Heung-Yun Kim, Il-Ryoung Sohn, Dae-Chul Bae
  • Publication number: 20190382877
    Abstract: Provided is an aluminum-based alloy plate steel sheet, which comprises a base steel sheet, an interfacial alloy layer, and an aluminum-based plated layer comprising a Mg—Si-based alloy phase, and in which b/a is 1-5 when the area fraction of the Mg—Si-based alloy phase contained in the aluminum-based plated layer is a and the area fraction of the Mg—Si-based alloy phase contained in the region of the lower 20% in the thickness direction of the aluminum-based plated layer is b.
    Type: Application
    Filed: December 22, 2017
    Publication date: December 19, 2019
    Inventors: Heung-Yun KIM, Young-Ha KIM
  • Publication number: 20190010597
    Abstract: Provided is a high-manganese hot-dip aluminum-coated steel sheet comprising: a base steel sheet containing, by weight, 5% to 35% of Mn, 0.3 to 6% of Al, 0.1 to 1.2% of Si, the balanced amount of Fe, and inevitable impurities; a hot-dip aluminum-coated layer, formed on a surface of the base steel sheet, containing, by weight, 3 to 12% of Si and the balanced amount of Al, and inevitable impurities; and an alloy layer, 0.1 to 10 ?m in thickness with a Fe—Al—Si—Mn-based alloy phase on an interface between the base steel sheet and the hot-dip aluminum-coated layer, containing, by weight, 40 to 70% of Al, 2 to 13% of Si, 3 to 9% of Mn, the balance amount of Fe, and inevitable impurities.
    Type: Application
    Filed: December 23, 2016
    Publication date: January 10, 2019
    Inventors: Heung-Yun KIM, Hyeon-Seok HWANG, Young-Ha KIM
  • Publication number: 20180223387
    Abstract: Provided is a method of manufacturing an HPF part comprising: preparing a steel sheet comprising C: 0.18% to 0.25%, Si: 0.1% to 1.0%, Mn: 0.9% to 1.5%, P: 0.03% or less, S: 0.01% or less, Al: 0.01% to 0.05%, Cr: 0.05% to 0.5%, Ti: 0.01% to 0.05%, B: 0.001% to 0.005%, N: 0.009% or less, and a balance of Fe and impurities; heating the steel sheet at 550° C. to 850° C. followed by maintaining at 640° C. to 680° C., and immersing the steel sheet in a hot dip aluminum plating bath, and a balance of Al and impurities; cooling the plated steel sheet at 15° C./s or faster; heating the cooled hot dip aluminum plated steel sheet at 880° C. to 930° C. followed by maintaining for a certain time; and hot forming the alloyed hot dip aluminum plated steel sheet and quenching at a range of 300° C. or lower at the same time.
    Type: Application
    Filed: April 3, 2018
    Publication date: August 9, 2018
    Inventors: Il-Ryoung SOHN, Dae-Chul BAE, Heung-Yun KIM
  • Publication number: 20180142337
    Abstract: Provided is a hot press formed article having good anti-delamination and having a hot dip aluminized layer formed on the surface of a base steel sheet. The base steel sheet comprises 0.18-0.25 wt % of C, 0.1-0.5 wt % of Si, 0.9-1.5 wt % of Mn, 0.03 wt % or less of P, 0.01 wt % or less of S, 0.01-0.05 wt % of Al, 0.05-0.5 wt % of Cr, 0.01-0.05 wt % of Ti, 0.001-0.005 wt % of B, 0.009 wt % or less of N and the balance of Fe and other impurities. The aluminized layer comprises a single soft diffusion layer comprising ?-Fe with solid-solubilized Al, and the hardness of the diffusion layer is 300-600 (Hv).
    Type: Application
    Filed: April 5, 2016
    Publication date: May 24, 2018
    Inventor: Heung-Yun KIM
  • Patent number: 9963758
    Abstract: Provided is a hot press-formed (HPF) member with excellent powdering resistance at the time of press forming. The HPF member includes a hot-dip coating layer containing Al on a surface of a base steel sheet. The base steel sheet includes, based on wt %, 0.18-0.25% of C, 0.1-1.0% of Si, 0.9-1.5% of Mn, 0.03% or less of P, 0.01% or less of S, 0.01-0.05% of Al, 0.05-0.5% of Cr, 0.01-0.05% of Ti, 0.001-0.005% of B, 0.009% or less of N, the balance Fe, and the other impurities. The hot-dip coating layer comprises a soft diffusion layer and a hard alloy layer. The alloy layer has a Tau phase in the range of 10-30%, in terms of area percent.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: May 8, 2018
    Assignee: POSCO
    Inventors: Il-Ryoung Sohn, Dae-Chul Bae, Heung-Yun Kim
  • Publication number: 20160376679
    Abstract: An HPF molding member having a melted aluminum plating layer formed on the surface of a base steel sheet and excellent delamination resistance. The base steel sheet comprises: 0.18-0.25% by weight of C; 0.1-1.0% by weight of Si; 0.9-1.5% by weight of Mn; 0.03% by weight or less of P; 0.01% by weight or less of S; 0.01-0.05% by weight of Al; 0.05-0.5% by weight of Cr; 0.01-0.05% by weight of Ti; 0.001-0.005% by weight of B; 0.009% by weight or less of N; and the balance Fe and other impurities. The plating layer consists of a soft diffusion layer and a hard alloy layer, the hard alloy layer having a tau layer irregularly and non-continuously dispersed and distributed on the inside thereof at 10% or more of the entire area fraction. The difference in hardness between the alloy layer and the diffusion layer is 400 (Hv) or less.
    Type: Application
    Filed: August 29, 2016
    Publication date: December 29, 2016
    Inventors: Heung-Yun KIM, Il-Ryoung SOHN, Dae-Chul BAE
  • Publication number: 20160362764
    Abstract: Provided is a hot press-formed (HPF) member with excellent powdering resistance at the time of press forming. The HPF member includes a hot-dip coating layer containing Al on a surface of a base steel sheet. The base steel sheet includes, based on wt %, 0.18-0.25% of C, 0.1-1.0% of Si, 0.9-1.5% of Mn, 0.03% or less of P, 0.01% or less of S, 0.01-0.05% of Al, 0.05-0.5% of Cr, 0.01-0.05% of Ti, 0.001-0.005% of B, 0.009% or less of N, the balance Fe, and the other impurities. The hot-dip coating layer comprises a soft diffusion layer and a hard alloy layer. The alloy layer has a Tau phase in the range of 10-30%, in terms of area percent.
    Type: Application
    Filed: August 29, 2016
    Publication date: December 15, 2016
    Inventors: Il-Ryoung SOHN, Dae-Chul BAE, Heung-Yun KIM