Patents Assigned to Posco
  • Acid-resistant steel sheet and manufacturing method therefor
    Patent number: 12221707
    Abstract: An acid-resistant steel sheet according to an embodiment of the present invention includes, by wt %, equal to or less than 0.1% of C (excluding 0%) and 2.0 to 4.0% of Si, and includes a remainder of Fe and inevitable impurities, and the content of Si of the surface portion by the inward depth of up to 10 ?m from the surface of the steel sheet is equal to or greater than 15 wt %.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: February 11, 2025
    Assignee: POSCO CO., LTD
    Inventors: Minho Jo, Byoung Ho Lee, Young-Kwang Hong
  • Pre-stressed steel sheet
    Patent number: 12220770
    Abstract: The present disclosure provides a pre-stressed steel sheet comprising: a base material; and a plurality of weld lines formed on the base materials, wherein the average spacing between each pair of the weld lines is equal to or greater than five times the width of the weld lines and equal to or less than half the width of the steel sheet.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: February 11, 2025
    Assignee: POSCO
    Inventor: Jae-Yik Lee
  • High-strength aluminum coated steel sheet having excellent anti-corrosion properties and weldability, and manufacturing method thereof
    Patent number: 12221700
    Abstract: Provided is an aluminum coated steel sheet having excellent anti-corrosion properties and weldability, and a manufacturing method thereof. The aluminum coated steel sheet includes: an austenitic base steel sheet including at least 70 area % of an austenite microstructure; and an aluminum coating layer formed on the base steel sheet, wherein the base steel sheet includes at least 80 area % of ferrite in a surface layer portion, which denotes a region extending from the interface with the coating layer to a depth of 100 ?m into the base steel sheet, and the aluminum coating layer may have a composition comprising 2-12 wt % of Si, 5-30 wt % of Zn, and 0.1-5 wt % of Mn, with the balance being Al and inevitable impurities.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: February 11, 2025
    Assignee: POSCO CO., LTD
    Inventors: Suk-Kyu Lee, Jong-Gi Oh, Myung-Soo Kim
  • Steel plate for high temperature applications having excellent strength at high temperature and method for manufacturing the same
    Patent number: 12221681
    Abstract: Provided are a steel plate for high temperature applications having excellent strength at a high temperature and a method for manufacturing same. The steel plate for high temperature applications having excellent post-weld heat treatment resistance, according to the present invention, comprises by weight percent: C:0.05-0.25%; Mn:0.1-1.0%; Si:0.1-0.8%; Cr:1-3%; Cu:0.05-0.3%; Mo:0.5-1.5%; Ni:0.05-0.5%; Al:0.005-0.1%; and at least one of Ir:0.005-0.10% and Rh:0.005-0.10%, the balance being Fe and inevitable impurities.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: February 11, 2025
    Assignee: POSCO CO., LTD
    Inventor: Soon-Taik Hong
  • CALCIUM-CONTAINING GRAPHITE STEEL WIRE ROD, GRAPHITE STEEL, AND MANUFACTURING AND CUTTING METHOD THEREFOR
    Publication number: 20250043400
    Abstract: The present disclosure relates to a calcium-containing graphite steel wire rod, a steel wire, a graphite steel, and a manufacturing and cutting method thereof, and more particularly, to a cutting method for manufacturing industrial parts, a graphite steel wire rod, a graphite steel, and a manufacturing method therefor.
    Type: Application
    Filed: December 13, 2022
    Publication date: February 6, 2025
    Applicant: POSCO CO., LTD
    Inventors: Sangwoo CHOI, Namsuk LIM
  • AUSTENITIC STEEL HAVING EXCELLENT ULTRA-LOW TEMPERATURE TOUGHNESS IN WELD HEAT-AFFECTED ZONE, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20250043405
    Abstract: According to one aspect of the present invention, an austenitic high-manganese steel having excellent ultra-low temperature toughness in a weld heat-affected zone, and a manufacturing method therefor can be provided.
    Type: Application
    Filed: December 20, 2022
    Publication date: February 6, 2025
    Applicant: POSCO Co., Ltd
    Inventors: Soon-Gi LEE, Sang-Deok KANG
  • AUSTENITIC STEEL HAVING EXCELLENT EXTREME LOW TEMPERATURE TOUGHNESS IN HEAT-AFFECTED ZONE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20250043401
    Abstract: An aspect of the present invention provides: an austenitic high-manganese steel having excellent extreme low temperature toughness in a heat-affected cone; and a method for manufacturing same.
    Type: Application
    Filed: December 20, 2022
    Publication date: February 6, 2025
    Applicant: POSCO CO., LTD
    Inventors: Soon-Gi LEE, Sang-DEok KANG
  • METHODS FOR MANUFACTURING WIRE ROD FOR COLD FORGING AND SCREW PART, HAVING EXCELLENT DRILLING CHARACTERISTICS
    Publication number: 20250043376
    Abstract: The present disclosure relates to methods for manufacturing a wire rod for cold forging and a screw part, which may manufacture with only quenching heat treatment a part with excellent drilling characteristics, and which may specifically manufacture a part to be used for mechanical coupling of automotive parts manufactured with different materials.
    Type: Application
    Filed: December 13, 2022
    Publication date: February 6, 2025
    Applicant: POSCO CO., LTD.
    Inventors: Byungin JUNG, Youngsoo CHUN, Yongsik PARK
  • COLD ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING
    Publication number: 20250043404
    Abstract: A cold rolled steel sheet according to an exemplary embodiment of the present invention comprises, by wt %: C: 0.01 to 0.10%; Mn: 0.1 to 0.4%; Al: 0.01 to 0.10%; P: 0.003 to 0.020%; N: 0.001 to 0.006%; S: 0.015% or less; Cr: 0.1 to 0.4%; B: 0.0005 to 0.0035%; Ni: 0.04 to 0.10%; and the balance Fe and other unavoidable impurities, and comprises a (Cr—B)(C—N)-based composite precipitate having a size of 0.01 to 0.1 ?m, wherein a [I 222+I 554]/I 200 texture ratio is 5.0 to 10.0, an earing rate is less than 3.0%, and an alloying rate of an alloy layer may be 5 to 15%.
    Type: Application
    Filed: December 16, 2022
    Publication date: February 6, 2025
    Applicant: POSCO CO., LTD
    Inventor: Jaiik Kim
  • COLD-ROLLED STEEL SHEET AND GALVANIZED STEEL SHEET WITH EXCELLENT PRESS FORMABILITY AND METHOD OF MANUFACTURING THEREOF
    Publication number: 20250043379
    Abstract: A cold-rolled steel sheet, according to one embodiment of the present invention, may comprise in percentage by weight: carbon (C): 0.010-0.025%; manganese (Mn): 0.10-0.25%; sulfur(S): 0.002-0.011%; boron (B): 0.0006-0.0026%; nitrogen (N): 0.0010-0.0034%; aluminum (Al): 0.006-0.028%; and the balance being Fe and unavoidable impurities, and may comprise precipitates of at least one of MnS and BN, wherein the average particle diameter of the precipitates may be 40-250 nm, the area fraction of the precipitates in the cold-rolled steel sheet may be 1-10%, and the yield strength may be 150-220 MPa.
    Type: Application
    Filed: December 16, 2022
    Publication date: February 6, 2025
    Applicant: POSCO CO., LTD
    Inventor: Byoung Ho Lee
  • Non-oriented electrical steel sheet and method for manufacturing same
    Patent number: 12215403
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention includes, in wt %, Si: 1.5 to 4.0%, Al: 0.1 to 1.5%, Mn: 0.05 to 1.5%, Sn: 0.015 to 0.1%, P: 0.005 to 0.05%, Ga: 0.001 to 0.004%, and Bi: 0.0005 to 0.003%, and the balance of Fe and inevitable impurities. An area fraction of texture in a {118}//ND orientation is higher than that of texture in a {111}//ND orientation.
    Type: Grant
    Filed: December 9, 2020
    Date of Patent: February 4, 2025
    Assignee: POSCO
    Inventors: Hunju Lee, Jae-Hoon Kim, Seung-Gon Lee, Seung Il Kim
  • Non-directional electrical steel sheet and method for producing same
    Patent number: 12215400
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention includes, in wt %, Si at 0.2 to 4.3%, Mn at 0.05 to 2.5%, Al at 0.1 to 2.1%, Bi at 0.0001 to 0.003%, Ga at 0.0001 to 0.003%, and the balance of Fe and inevitable impurities.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: February 4, 2025
    Assignee: POSCO CO., LTD
    Inventors: Jaewan Hong, June Soo Park, Su-Yong Shin, Yong-Soo Kim
  • Gas detection device
    Patent number: 12217594
    Abstract: A gas detection device is disclosed.
    Type: Grant
    Filed: September 1, 2021
    Date of Patent: February 4, 2025
    Assignee: POSCO CO., LTD
    Inventors: Cheol-hee Choi, Kisoo Kim, Dukman Lee
  • Apparatus for cooling metal material
    Patent number: 12215425
    Abstract: Provided is an apparatus for cooling a metal material, the apparatus comprising: a spray cooling unit for spraying a cooling medium onto the surface of a metal material; and a spray amount control unit which regulates the rate of passage of the cooling medium sprayed from the spray cooling unit onto the edge region of the metal material, and controls the spray amount of the cooling medium.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: February 4, 2025
    Assignee: POSCO CO., LTD
    Inventor: Jung-Kuk Kim
  • GRAPHITE STEEL WIRE ROD AND GRAPHITE STEEL FOR TV PEM NUT PARTS, METHODS FOR MANUFACTURING AND CUTTING THEREFOR
    Publication number: 20250034672
    Abstract: The present disclosure relates to a graphite steel wire rod for TV PEM nut parts, a graphite steel, and a manufacturing and cutting method therefor, and more particularly, to a cutting method for manufacturing industrial parts, a graphite steel wire rod, a graphite steel wire rod, a graphite steel, and a manufacturing method therefor.
    Type: Application
    Filed: December 13, 2022
    Publication date: January 30, 2025
    Applicant: POSCO CO., LTD.
    Inventors: Sangwoo CHOI, Namsuk LIM, Sewon PARK
  • STAINLESS STEEL FOR FUEL CELL SEPARATOR AND MANUFACTURING METHOD THEREOF
    Publication number: 20250038221
    Abstract: Provided are a metal material, for a fuel cell separator, having: five or more fine protrusions of 10 to 100 nm on the metal material surface coming into contact with a GDL in a fuel cell; and a real surface length/protrusion-free apparent surface length ratio of 1.15 or more based on a cross-section observed by a transmission electron microscope. The metal material is characterized by having a contact resistance of 10 m?·cm2 or less by forming fine protrusions on the surface.
    Type: Application
    Filed: December 14, 2022
    Publication date: January 30, 2025
    Applicant: POSCO CO., LTD
    Inventors: Kwangmin Kim, Donghoon Kim, Bosung Seo, Jonghee Kim
  • METHOD FOR MANUFACTURING MOLDED PARTS
    Publication number: 20250033108
    Abstract: The present invention provides a method for manufacturing molded parts, the method being characterized by comprising: a first molding step for molding a base material to form a first molded part including a first upper flange and a pair of first web members extending in intersecting directions from the left and right ends of the first upper flange; and a second molding step for compressing the first molded part to form a second molded part including a second upper flange and a pair of second web members extending in intersecting directions from the left and right ends of the second upper flange, wherein, in a width direction cross section, the first upper flange is longer than the second upper flange and the first web members are longer than the second web members.
    Type: Application
    Filed: December 1, 2022
    Publication date: January 30, 2025
    Applicant: POSCO CO., LTD
    Inventor: Kyung-Seok Oh
  • ALUMINUM ALLOY-PLATED STEEL SHEET HAVING EXCELLENT WORKABILITY AND CORROSION RESISTANCE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20250034692
    Abstract: An aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same are disclosed. The aluminum alloy-plated steel sheet includes a base sheet, and an alloy-plated layer formed on the base sheet. Interfacial roughness between the alloy-plated layer and the base steel sheet is 25 ?m or less. Such an aluminum alloy-plated steel sheet prevents microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance. A method for manufacturing such an aluminum alloy-plated steel is also disclosed.
    Type: Application
    Filed: October 17, 2024
    Publication date: January 30, 2025
    Applicant: POSCO Co., Ltd.
    Inventors: Suk-Kyu Lee, Hyeon-Seok Hwang, Myung-Soo Kim, Jong-Gi Oh, Kwang-Tai Min
  • AUSTENITIC STEEL HAVING EXCELLENT ULTRA-LOW TEMPERATURE TOUGHNESS IN WELD HEAT-AFFECTED ZONE, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20250034671
    Abstract: According to one aspect of the present invention, an austenitic high-manganese steel having excellent ultra-low temperature toughness in a weld heat-affected cone, and a manufacturing method therefor can be provided.
    Type: Application
    Filed: December 20, 2022
    Publication date: January 30, 2025
    Applicant: POSCO CO., LTD
    Inventors: Soon-Gi LEE, Jong-Kyo CHOI, Sang-Deok KANG
  • POSITIVE ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD OF PREPARING SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME
    Publication number: 20250033994
    Abstract: The present exemplary embodiments relate to a positive electrode active material, its manufacturing method, and a lithium secondary battery including the same. The positive electrode active material according to an exemplary embodiment is a metal oxide particle including: a metal oxide particle comprising a central portion and a surface portion located on the surface of the central portion, wherein, the metal oxide particle includes nickel, cobalt, manganese, and doping elements and is composed of a single particle, and the metal oxide particle includes a crystal phase of layered structure belonging to the R-3m space group on the surface, and an average grain size is 1550 ? or more.
    Type: Application
    Filed: September 2, 2022
    Publication date: January 30, 2025
    Applicants: POSCO Holdings Inc., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, POSCO CHEMICAL CO., LTD
    Inventors: Kwon Young CHOI, Jung Hoon SONG, Sanghyuk LEE, Inchul PARK, Ohmin KWON, Byong Yong YU, Kijoo HONG, Sang Cheol NAM