Patents Assigned to Posco
  • GRAIN ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
    Publication number: 20250051867
    Abstract: A grain oriented electrical steel sheet according to an exemplary embodiment of the present invention includes a grain oriented electrical steel sheet base material and a metal oxide layer present on both sides of the grain oriented electrical steel sheet base material. A maximum Al fraction in the metal oxide layer is 0.15 to 1.0 wt %, and a ratio (DWL/DWS) of an average magnetic domain width (DWL) of a side with a large average magnetic domain width to an average magnetic domain width (DWS) of a side with a small average magnetic domain width of one side and the other side of the electrical steel sheet base material is 1.2 to 1.8.
    Type: Application
    Filed: December 21, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Jae-Song Kim, Il-Nam Yang, Seonghoon Min
  • VALUABLE METAL RECOVERY ALLOY, VALUABLE METAL RECOVERY COMPOSITION, AND METHOD FOR RECOVERING VALUABLE METAL
    Publication number: 20250055053
    Abstract: The exemplary embodiments relate to a valuable metal recovery alloy, a valuable metal recovery composition, and a valuable metal recovery method. According to an exemplary embodiment, the valuable metal recovery alloy may include, based on 100 wt % of the total composition of an alloy, a valuable metal of 45 wt % and a remainder which is impurities, and the valuable metal recovery alloy may satisfy Equation 1 below. 0.
    Type: Application
    Filed: December 6, 2022
    Publication date: February 13, 2025
    Applicant: POSCO HOLDINGS INC.
    Inventors: Sang Woo HAN, Wan-Yi KIM, Sanghyeon YOON, Hyunjin CHO, Sungsuk JUNG
  • POSITIVE ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, POSITIVE ELECTRODE INCLUDING SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME
    Publication number: 20250054969
    Abstract: Provided are a positive active material for a lithium secondary battery, a positive electrode including the same, and a lithium secondary battery including the same, the positive active material for lithium secondary batteries including a first metal oxide, which includes nickel, cobalt and manganese, being in single particle form; and a second metal oxide that contains nickel, cobalt, and manganese and is in the form of a secondary particle containing a plurality of primary particles and has an average particle diameter D50 larger than that of the first metal oxide; wherein, a nickel content of the second metal oxide is 0.8 mol or more, based on 1 mole of the total of nickel, cobalt and manganese in the second metal oxide, and a nickel content of the first metal oxide is 0.03 mole to 0.17 mole more than the nickel content of the second metal oxide.
    Type: Application
    Filed: December 16, 2022
    Publication date: February 13, 2025
    Applicants: POSCO Holdings Inc., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, POSCO FUTURE M CO., LTD.
    Inventors: Sang Cheol NAM, Byong Yong YU, Kijoo HONG, Jong II PARK, Sang Hyuk LEE, Kwon Young CHOI
  • GRAIN ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD OF SAME
    Publication number: 20250051871
    Abstract: A method for manufacturing a grain oriented electrical steel sheet according to an exemplary embodiment of the present invention includes manufacturing a hot-rolled steel sheet by hot rolling a slab; subjecting the hot-rolled steel sheet to hot-rolled steel sheet annealing; subjecting the hot-rolled steel sheet annealed hot-rolled steel sheet to primary cold rolling; subjecting the primarily cold-rolled steel sheet to primary decarburization annealing; subjecting the decarburization-annealed steel sheet to secondary cold rolling; subjecting the secondarily cold-rolled steel sheet to secondary decarburization annealing; subjecting the secondarily decarburization-annealed steel sheet to primary non-oxidizing annealing of annealing the steel sheet at a temperature ranging from 1000° C. to 1200° C. and a dew point temperature of ?20° C.
    Type: Application
    Filed: December 21, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Hyun-Seok KO, Jin-Wook SEO, Minsoo HAN
  • ADHESIVE COATING COMPOSITION FOR ELECTRICAL STEEL SHEET, ELECTRICAL STEEL SHEET LAMINATE, AND METHOD FOR MANUFACTURING ELECTRICAL STEEL SHEET PRODUCT
    Publication number: 20250051622
    Abstract: The present disclosure provides an electrical steel sheet adhesive coating composition containing a polyurethane resin and an inorganic pigment, wherein the inorganic pigment is contained in an amount of 20 to 150 parts by weight with respect to 100 parts by weight of the polyurethane resin, and the polyurethane resin is formed by reacting an aromatic diisocyanate monomer and a polyol, an electrical steel sheet laminate using the same, and a method for manufacturing the same.
    Type: Application
    Filed: December 16, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Bongwoo HA, Jungwoo KIM, Taeyoung NO, Donggyu LEE
  • HOT-ROLLED STEEL FOR HYPER TUBE AND MANUFACTURING METHOD THEREFOR
    Publication number: 20250051892
    Abstract: An aspect of the present invention may provide a hot-rolled steel sheet that is excellent in terms of yield strength, vibration damping ratio, weldability, and weld site-low temperature toughness and thus has physical properties suitable for use in a vacuum train tube maximizing energy efficiency of a vacuum train; and a manufacturing method therefor.
    Type: Application
    Filed: December 19, 2022
    Publication date: February 13, 2025
    Applicant: POSCO Co., Ltd
    Inventors: Hong-Seok YANG, Nam-II JO, Jin-Joo CHOI, Seung-Gohn KIM, Seok-Jong SEO
  • INSULATION COATING COMPOSITION FOR ELECTRICAL STEEL SHEET, ELECTRICAL STEEL SHEET, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20250051603
    Abstract: An insulation coating composition for an electrical steel sheet according to an exemplary embodiment of the present disclosure contains 100 parts by weight of a resin containing two or more aromatic rings or aliphatic rings in a repeating unit and 20 to 150 parts by weight of zirconium phosphate.
    Type: Application
    Filed: December 20, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Min Serk KWON, Se-Min PARK, Heon-Jo CHOI
  • ANNEALING SEPARATING AGENT COMPOSITION FOR GRAIN ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING GRAIN ORIENTED ELECTRICAL STEEL SHEET
    Publication number: 20250051869
    Abstract: An annealing separating agent composition for a grain oriented electrical steel sheet according to an embodiment of the present invention contains 25-80 wt % of a boron compound on the basis of 100 wt % of the total solid content, with the remainder comprising at least one among magnesium oxide and magnesium hydroxide.
    Type: Application
    Filed: December 20, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventor: Min Serk KWON
  • SODIUM ION ADSORBENT, PREPARATION METHOD THEREOF, AND METHOD OF REMOVING SODIUM ION
    Publication number: 20250050307
    Abstract: The present exemplary embodiments relate to a sodium ion adsorbent, a method of manufacturing the same, and a method for removing sodium ions. According to an exemplary embodiment, a sodium ion adsorbent for removing sodium ions may include a compound represented by Chemical Formula 1 below. [Chemical Formula 1] HxM1-xAlSi2O6, in Chemical Formula 1, M is one or more elements selected from Na, K, Cs, and Rb, and 0<x?1.
    Type: Application
    Filed: December 15, 2022
    Publication date: February 13, 2025
    Applicants: POSCO Co., Ltd, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Gi-Chun HAN, Sang Won KIM, Seung Goo KIM, Seung Seok LEE, Young-Seon KO, Young Geun SON, Kee Uek JEUNG
  • ULTRAHIGH-STRENGTH HOT-ROLLED STEEL SHEET HAVING EXCELLENT FORMABILITY AND MANUFACTURING METHOD THEREFOR
    Publication number: 20250051870
    Abstract: The present invention relates to a hot-rolled steel sheet that can be suitably applied to an automobile chassis structure member or the like and, more specifically, to an ultrahigh-strength hot-rolled steel sheet having tensile strength of 1180 MPa or more, excellent formability, and uniform material distribution in the steel sheet, and a manufacturing method therefor.
    Type: Application
    Filed: November 22, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Tae-Jin Song, Joo-Hyun Ryu, Je-Woong Lee
  • NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
    Publication number: 20250051888
    Abstract: A non-oriented electrical steel sheet according to one embodiment of the present invention comprises, by wt %, 1.4-3.0% of Si; 0.001-1.5% of Mn; and 0.001-0.2% of Al, with the remainder of Fe and inevitable impurities, wherein a thickness deviation in the direction perpendicular to a rolling direction is 1.5 ?m or less per 5 mm length, and a thickness derivation in the rolling direction is 10 ?m or less per 1000 m length.
    Type: Application
    Filed: December 20, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Jaewan Hong, Hyung Don Joo, Junesoo Park
  • STEEL SHEET AND MANUFACTURING METHOD THEREFOR
    Publication number: 20250051889
    Abstract: The present invention relates to a high-strength steel sheet having excellent formability and a high yield ratio, and a manufacturing method therefor, and more particularly, to a high-strength steel sheet having excellent formability and a high yield ratio, and a manufacturing method therefor, the steel sheet having various uses such as that of vehicle parts.
    Type: Application
    Filed: December 14, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Jae-Hoon LEE, Seong-Ho HAN, Yong-Hoon CHOI
  • INSULATION COATING COMPOSITION FOR ELECTRICAL STEEL SHEET, ELECTRICAL STEEL SHEET, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20250051868
    Abstract: An insulation coating composition for an electrical steel sheet according to an exemplary embodiment of the present disclosure contains, with respect to 100 parts by weight of a solid content, 30 to 60 parts by weight of an organic/inorganic composite in which inorganic nanoparticles are substituted in a resin, 15 to 45 parts by weight of a metal phosphate, 10 to 40 parts by weight of kaolin, 1 to 10 parts by weight of an inorganic dispersant, and 0.1 to 5 parts by weight of a carbon structure.
    Type: Application
    Filed: December 21, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Jungwoo KIM, Bongwoo HA, Donggyu LEE, Taeyoung NO
  • AUSTENITIC STAINLESS STEEL AND MANUFACTURING METHOD THEREFOR
    Publication number: 20250051894
    Abstract: The present disclosure relates to an austenitic stainless steel and a manufacturing method therefor, and specifically, to an austenitic stainless steel and a manufacturing method therefor, wherein the austenitic stainless steel can secure both excellent strength and ductility even after undergoing low-temperature annealing and have excellent competitiveness and corrosion resistance.
    Type: Application
    Filed: October 25, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Seokweon Song, Minam Park
  • SOLUTION COMPOSITION FOR STEEL SHEET SURFACE TREATMENT, STEEL SHEET SURFACE-TREATED USING SAME, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20250051929
    Abstract: The present invention relates to a solution composition capable of improving pitting corrosion resistance and blackening resistance of a steel sheet, a steel sheet surface-treated using same, and a method for manufacturing the steel sheet.
    Type: Application
    Filed: December 19, 2022
    Publication date: February 13, 2025
    Applicant: POSCO CO., LTD
    Inventors: Chang-Hoon Choi, Soo-Hyoun Cho, Tae-Chul Kim, Sung-Joo Kim
  • CATHODE ACTIVE MATERIAL FOR ALL SOLID BATTERY, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20250054953
    Abstract: A positive electrode active material for an all-solid-state battery of the present exemplary embodiments may include: a core including a lithium nickel-based oxide; a first coating layer containing cobalt which is placed on a surface of the core; and a second coating layer containing a lithium transition metal oxide which is placed on a surface of the first coating layer.
    Type: Application
    Filed: December 15, 2022
    Publication date: February 13, 2025
    Applicants: POSCO HOLDINGS INC., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Ji Woong MOON, Tai Hee EUN, Yooncheol PARK, Jung Hoon SONG, Jeongsik YUN, Sang Cheol NAM
  • Welded member of galvanized steel sheets
    Patent number: 12221701
    Abstract: A welded member includes: a first steel sheet including a base steel sheet and a zinc-based plating layer formed on a surface of the base steel sheet; and a second steel sheet spot-welded on the first steel sheet and facing the zinc-based plating layer of the first steel sheet, a spot-welded zone being formed between the first steel sheet and the second steel sheet. A surface layer of the base steel sheet has a decarburization ratio of 30% or more. The decarburization ratio is represented by equation: Decarburization ratio (%) of surface layer=(1?average carbon concentration in surface layer/bulk carbon concentration)*100 where the surface layer refers to a region of the base steel sheet from the surface thereof to a depth of 35 ?m. A shoulder portion of the spot-welded zone includes a B-type crack having a length of 100 ?m or less, and no C-type crack.
    Type: Grant
    Filed: March 29, 2024
    Date of Patent: February 11, 2025
    Assignee: POSCO CO., LTD
    Inventors: Ki-Cheol Kang, Sang-Ho Uhm, Chang-Woon Jee, Yeon-Chae Jeong, Kwang-Tai Min
  • Ultrahigh-strength steel having excellent cold workability and SSC resistance, and manufacturing method therefor
    Patent number: 12221682
    Abstract: One embodiment of the present invention provides an ultrahigh-strength steel having excellent cold workability and SSC resistance, comprising, by wt %, carbon (C) in an amount of more than 0.08% and equal to or less than 0.2%, 0.05-0.5% of silicon (Si), 0.5-2% of manganese (Mn), 0.005-0.1% of aluminum (Al), 0.01% or less of phosphorus (P), 0.0015% or less of sulfur (S), 0.001-0.03% of niobium (Nb), 0.001-0.03% of vanadium (V), 0.001-0.03% of titanium (Ti), 0.01-1% of chromium (Cr), 0.01-0.15% of molybdenum (Mo), 0.01-0.5% of copper (Cu), 0.05-4% of nickel (Ni), 0.0005-0.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: February 11, 2025
    Assignee: POSCO CO., LTD
    Inventors: Dae-Woo Kim, Young-Jin Jung
  • Surface treatment solution composition containing trivalent chromium and inorganic compound, and method for manufacturing hot dip galvanized steel sheet surface-treated using same
    Patent number: 12221702
    Abstract: Provided is a surface treatment solution composition comprising: 30 to 51 wt % of a trivalent chromium compound comprising chromium phosphate (A) and chromium nitrate (B) and having a content ratio of A/(A+B) that satisfies 0.3 to 0.6; 5 to 15 wt % of silane coupling agent; 0.2 to 3 wt % of vanadium-based anti-corrosive rust inhibitor; 3 to 12 wt % of colloidal silica; 0.5 to 5 wt % of polysiloxane copolymer; and 14 to 61.3 wt % of water, a hot dip galvanized steel sheet surface-treated using same, and a manufacturing method thereof. The hot dip galvanized steel sheet treated with the surface treatment solution composition containing trivalent chromium has an excellent corrosion resistance, blackening resistance, pipe-forming oil reactivity, and alkali resistance.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: February 11, 2025
    Assignee: POSCO CO., LTD
    Inventors: Soo-Hyoun Cho, Kang-Min Lee
  • Cryogenic austenitic high-manganese steel having excellent corrosion resistance, and manufacturing method therefor
    Patent number: 12221680
    Abstract: The cryogenic austenitic high-manganese steel having excellent corrosion resistance, according to one aspect of the present invention, comprises 0.2-0.5 wt % of C, 23-28 wt % of Mn, 0.05-0.5 wt % of Si, 0.03 wt % or less of P, 0.005 wt % or less of S, 0.5 wt % or less of Al, and 3-4 wt % of Cr, with the remainder being Fe and other unavoidable impurities, also comprises at least 95 area % of austenite as a microstructure, and has Cr concentration sections continuously formed within an area of 50 ?m in the thickness direction from the surface, wherein the Cr concentration sections comprise a high Cr concentration section having a relatively high concentration of Cr, and a low Cr concentration section having a relatively low concentration of Cr, and the high Cr concentration section may be distributed at 30 area % or less (but not 0%) relative to the whole surface area of the Cr sections.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: February 11, 2025
    Assignee: POSCO CO., LTD
    Inventors: Un-Hae Lee, Dong-Ho Lee, Sang-Deok Kang, Sung-Kyu Kim