Patents Assigned to Posco
  • WIRE ROD FOR ULTRAHIGH-STRENGTH SPRINGS, STEEL WIRE, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20240052455
    Abstract: Disclosed in the present specification are: a wire rod for ultrahigh-strength springs, which can be applied to motorcycle suspension springs; a steel wire; and a manufacturing method therefor. According to one embodiment of the disclosed wire rod for ultrahigh-strength springs, the wire rod comprises, by wt %, 0.5-0.7% of C, 0.4-0.9% of Si, 0.3-0.8% of Mn, 0.2-0.6% of Cr, 0.015% or less of P, 0.010% or less of S, 0.01% or less of Al, 0.01% or less of N, 0.005% or less of O, and the balance of Fe and inevitable impurities, wherein in 1 mm2 area of the center of the cross-section perpendicular to the longitudinal direction, the proportion of the area satisfying at least one from among C>0.8%, Si>0.9%, Cr>0.8% and Mn>0.8% by wt % can be 5% or less.
    Type: Application
    Filed: November 18, 2021
    Publication date: February 15, 2024
    Applicant: POSCO CO., LTD
    Inventors: Junmo LEE, Seok-hwan CHOI, Myunsoo CHOI
  • COMPOSITE STEEL SHEET HAVING EXCELLENT ADHESIVENESS, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20240052519
    Abstract: The present invention relates to a composite steel sheet having excellent adhesiveness, and a manufacturing method therefor, and, more particularly, to a light composite steel sheet obtained by forming microstructures on the surface and inside of a plated steel sheet, and then bonding same with a plastic layer to maximize adhesiveness.
    Type: Application
    Filed: December 9, 2021
    Publication date: February 15, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Hye-Jin Yoo, Chang-Se Byeon, Jung-Su Kim, Je-Hoon Baek, Kang-Min Lee
  • ELECTRICAL STEEL SHEET LAMINATE
    Publication number: 20240051269
    Abstract: The present invention relates to an electrical steel sheet laminate, and provided is an electrical steel sheet laminate comprising: a plurality of electrical steel sheets; and polymer adhesive layers positioned between the electrical steel sheets, wherein the coating thickness of the polymer adhesive layers is 1.8-5.4 ?m, the space factor of the laminate is 95.8-98.5%, and the following mathematical formula 1 is satisfied. [Mathematical Formula 1] 172.4?space factor (%)×thickness (?m)?531. 172.
    Type: Application
    Filed: December 20, 2021
    Publication date: February 15, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Jungwoo Kim, Bongwoo Ha, Donggyu Lee, Taeyoung No, Gyeongryeol Park
  • PLATED STEEL SHEET HAVING EXCELLENT SEALER ADHESION AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240052471
    Abstract: The present invention relates to a plated steel sheet which can be used for automobiles, home appliances, building materials, etc. and a method for manufacturing same and, more particularly, to a zinc alloy plated steel sheet having excellent adhesion to an adhesive and a method for manufacturing same.
    Type: Application
    Filed: December 20, 2021
    Publication date: February 15, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Tae-Chul Kim, Il-Ryoung Sohn, Bong-Hwan Yoo
  • HIGH-STRENGTH WIRE ROD FOR COLD HEADING WITH SUPERIOR HEAT TREATMENT CHARACTERISTICS AND RESISTANCE OF HYDROGEN-DELAYED FRACTURE CHARACTERISTICS, HEAT-TREATED COMPONENT, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240052467
    Abstract: Disclosed in the present specification are: a high-strength wire rod for cold heading, having superior heat treatment characteristics and resistance of hydrogen-delayed fracture characteristics, the rod being applicable to a bolt, etc.; a heat-treated component; and a method for manufacturing the same. According to an exemplary embodiment, the high-strength wire rod for cold heading with superior heat treatment characteristics and resistance of hydrogen-delayed fracture characteristics comprises, by wt %, 0.3-0.6% of C, 0.05-0.3% of Si, 0.2-1.0% of Mn, 0.5-2.0% of Cr, 0.5-2.0% of Mo, 0.02-0.05% of Al, 0.01-0.03% of N, and Fe and other impurities as the balance, and has a microstructure comprising, by area fraction, 80% or more of bainite, 1-15% of pearlite and 0.1-2% of martensite, and comprises 2×1019/m3 or more of aluminum nitride having a diameter of 5-50 nm.
    Type: Application
    Filed: November 18, 2021
    Publication date: February 15, 2024
    Applicant: POSCO CO., LTD
    Inventors: Byung-in JUNG, Hanhwi KIM
  • ANODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY INCLUDING SAME
    Publication number: 20240055604
    Abstract: It is related to a manufacturing method of negative electrode active material for lithium secondary battery, comprising: preparing an artificial graphite; forming a coating layer covering the artificial graphite by mixing the artificial graphite and a liquid coating material; and carbonizing the artificial graphite on which the coating layer is formed; wherein, the liquid coating material has a viscosity of 300 to 25000 mPa s at 35° C.; a negative electrode active material according to the method; and a lithium secondary battery including the same.
    Type: Application
    Filed: December 20, 2021
    Publication date: February 15, 2024
    Applicants: POSCO HOLDINGS INC., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, POSCO CHEMICAL CO., LTD
    Inventors: Gang Ho LEE, Jung-Chul AN, Sei Min PARK, Jong Hoon YOON, Hyun-Chul JO
  • CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY INCLUDING SAME
    Publication number: 20240055592
    Abstract: It is related to a positive electrode active material for lithium secondary battery, and to a lithium secondary battery containing the same. To improve the battery characteristics of high-capacity positive electrode materials by simultaneously doping tungsten (W) element, which has an excellent effect on electrical conductivity, and boron (B) element, which is positioned on the surface to suppress the negative reaction of residual lithium and electrolyte solution.
    Type: Application
    Filed: October 2, 2019
    Publication date: February 15, 2024
    Applicants: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Junghoon KIM, Chang Joo HAN, Young Sang KIM, Sang Cheol NAM, Geun HWANGBO
  • STEEL SHEET FOR HOT PRESS FORMED MEMBER HAVING EXCELLENT RESISTANCE TO HYDROGEN DELAYED FRACTURE AND METHOD FOR MANUFACTURING THEREOF
    Publication number: 20240051265
    Abstract: Provided is a steel sheet for a hot press formed member having excellent resistance to hydrogen delayed fracture, and a method for manufacturing the same. A steel sheet for a hot press formed member comprises: a base steel sheet; an aluminum alloy plating layer on a surface of the base steel sheet; and an oxide layer which is formed on a surface of the plating layer and has a thickness of 0.05 ?m or more.
    Type: Application
    Filed: September 27, 2023
    Publication date: February 15, 2024
    Applicant: POSCO CO., LTD
    Inventors: Seong-Woo KIM, Jin-Keun OH, Yeol-Rae CHO
  • PLATED STEEL SHEET FOR HOT PRESS FORMING, AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20240051005
    Abstract: A plated steel sheet for hot press forming with improved hydrogen delayed fracture properties is disclosed. The disclosed plated steel sheet includes a base steel sheet, and a plating layer formed on a surface of the base steel sheet and including, by weight, Si: 5.0 to 15.0%, Zn: 10.0 to 30.0%, Fe: 4.0 to 12.0%, and the remainder including Al and unavoidable impurities.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 15, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Hyeon-seok Hwang, Kkochnim Oh
  • GRAIN ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240052463
    Abstract: A grain oriented electrical steel sheet according to an embodiment of the present invention comprises: an electrical steel sheet base comprising 2.0 to 7.0 weight % of Si and 0.01 to 0.07 weight % of Sb, and the remainder being Fe and other unavoidable impurities; a fine-grained interfacial layer positioned in a direction toward the inside of the electrical steel sheet base from the surface of the electrical steel sheet base; a base coating layer positioned on the fine-grained interfacial layer; and an insulating coating layer positioned on the base coating layer. The grain oriented electrical steel sheet according to an embodiment of the present invention satisfies Formula 1 below. ([P]×[PS]+[F]×[FS]+[C]×[CS])/?([S]/2)?13.
    Type: Application
    Filed: December 15, 2021
    Publication date: February 15, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Minserk Kwon, Woncheol Chung, Hokyung Shim, Changsoo Park, Seonghoon Min
  • HIGH-STRENGTH HOT-DIPPED GALVANIZED STEEL SHEET HAVING EXCELLENT SURFACE QUALITY AND SPOT WELDABILITY, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20240052472
    Abstract: According to one aspect of the present invention, provided are a high-strength hot-dipped galvanized steel sheet having excellent surface quality and spot weldability, and a manufacturing method therefor.
    Type: Application
    Filed: December 7, 2021
    Publication date: February 15, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Ki-Cheol Kang, Jong-Chan Park, Seul-Gi So, Myung-Soo Kim
  • STEEL SHEET FOR PIPE HAVING EXCELLENT HYDROGEN-INDUCED CRACK RESISTANCE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240052450
    Abstract: The present disclosure relates to a steel sheet for pipes having excellent hydrogen-induced crack resistance and a method for manufacturing the same. One aspect of the present invention is to provide a steel sheet for a pipe having excellent hydrogen-induced crack resistance and a method for manufacturing same. According to an aspect of the present disclosure, a steel sheet for pipes having excellent hydrogen-induced crack resistance and a method for manufacturing the same may be provided.
    Type: Application
    Filed: November 22, 2021
    Publication date: February 15, 2024
    Applicant: POSCO CO., LTD
    Inventor: Kyung-Min NOH
  • STEEL SHEET FOR SEISMIC DAMPER HAVING SUPERIOR TOUGHNESS PROPERTY AND MANUFACTURING METHOD OF SAME
    Publication number: 20240052451
    Abstract: The present invention relates to: a steel sheet for a seismic damper used to provide a structure with seismic resistance against earthquakes; and a manufacturing method of same, and more specifically, to a steel sheet which is for a seismic damper and has a superior toughness property, and a manufacturing method of same.
    Type: Application
    Filed: November 30, 2021
    Publication date: February 15, 2024
    Applicant: POSCO CO., LTD
    Inventors: Jae-Young CHO, Sang-Deok KANG, Kyung-Tae KIM
  • WIRE ROD AND STEEL WIRE FOR SPRING, SPRING WITH IMPROVED FATIGUE RESISTANCE AND NITRIDING PROPERTIES, AND METHODS FOR MANUFACTURING SAME
    Publication number: 20240052453
    Abstract: Disclosed are a wire rod and a steel wire for a spring, a spring with improved fatigue resistance and nitriding property, and methods for manufacturing same. The wire rod for a spring with improved fatigue resistance and nitriding property according to the present disclosure contains, by wt %, 0.6-0.7% of C, 2.0-2.5% of Si, 0.2-0.5% of Mn, 0.9-1.6% of Cr, 0.015% of less of P, 0.01% of less of S, 0.01% of less of Al, 0.007% of less of N, 0.1-0.25% of Mo, 0.1-0.25% of V, and Fe and inevitable impurities as the balance, wherein Cr+Mn is 1.8% or less, Mo/V is 1.5 or less, and the microstructure includes 60% or more of a pearlite structure in the C section.
    Type: Application
    Filed: November 18, 2021
    Publication date: February 15, 2024
    Applicant: POSCO CO., LTD
    Inventors: Junmo LEE, Seok-hwan CHOI, Myungsoo CHOI
  • COMPOSITION FOR SURFACE TREATMENT OF STEEL SHEET AND STEEL SHEET USING THE SAME
    Publication number: 20240052496
    Abstract: A composition for surface treatment capable of imparting to a steel sheet, plate corrosion resistance, corrosion resistance of processed parts, pit corrosion resistance, blackening resistance, pipe forming oil infiltration, and alkali resistance, and improving foreign-matter defects; and a steel sheet using the same. The composition for surface treatment of a steel sheet includes a trivalent chromium compound; and adhesiveness improving agent containing a silane compound; an acidity modifier including acids; a crosslinking agent containing a silicate compound; a vanadium-based pit corrosion-improving agent; a polymer resin; and a solvent.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 15, 2024
    Applicants: POSCO Co., Ltd, UNICOH Speciality Chemicals Co., Ltd
    Inventors: Changhoon Choi, Jongkook Kim, Hocheol Song
  • Hot press-formed part, and manufacturing method thereof
    Patent number: 11897014
    Abstract: The present disclosure provides a hot-press formed part comprising a plated steel sheet and an aluminum alloy plated layer formed on the plated steel sheet, wherein the aluminum alloy plated layer comprises: an alloying layer (I) formed on the plated steel sheet and containing, by weight %, 5-30% of Al; an alloying layer (II) formed on the alloying layer (I) and containing, by weight %, 30 to 60% of Al; an alloying layer (III) formed on the alloying layer (II) and containing, by weight %, 20-50% of Al and 5-20% of Si; and an alloying layer (IV) formed continuously or discontinuously on at least a part of the surface of the alloying layer (III), and containing 30-60% of Al, wherein the rate of the alloying layer (III) exposed on the outermost surface of the aluminum alloy plated layer is 10% or more.
    Type: Grant
    Filed: January 12, 2023
    Date of Patent: February 13, 2024
    Assignee: POSCO CO., LTD
    Inventors: Seong-Woo Kim, Jin-Keun Oh, Sang-Heon Kim, Hyo-Sik Chun
  • Aluminum-based alloy-plated steel sheet having excellent workability and corrosion resistance, and manufacturing method therefor
    Patent number: 11898252
    Abstract: The present disclosure relates to an aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same, and more particularly, to an aluminum alloy-plated steel sheet preventing microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance, and a method for manufacturing the same.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: February 13, 2024
    Assignee: POSCO
    Inventors: Suk-Kyu Lee, Hyeon-Seok Hwang, Myung-Soo Kim, Kwang-Tai Min, Dae-Young Kang
  • Seat frame
    Patent number: 11897371
    Abstract: The present invention relates to a seat frame with reduced weight due to not including a cushion side frame, the seat frame comprising: a pair of rails; a cushion frame which supports a cushion and has a closed cross-sectional shape; front links which connect the rails to the cushion frame on the front side; rear links which connect the rails to the cushion frame on the rear side; and connection brackets which connect the rear links to a seatback frame.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: February 13, 2024
    Assignee: POSCO
    Inventors: Jae-Hyun Kim, Hong-Woo Lee, Dong-Yoon Seok
  • Aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and method for manufacturing same
    Patent number: 11897229
    Abstract: The present disclosure relates to an aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same, and more particularly, to an aluminum alloy-plated steel sheet preventing microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance, and a method for manufacturing the same.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: February 13, 2024
    Assignee: POSCO
    Inventors: Suk-Kyu Lee, Hyeon-Seok Hwang, Myung-Soo Kim
  • Positive active material for lithium secondary battery and lithium secondary battery comprising same
    Patent number: 11901552
    Abstract: The present disclosure relates to a positive active material for a lithium rechargeable battery and a lithium rechargeable battery including the same, which include a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, and a content of the first compound is 65 wt % or more based of the positive active material of 100 wt %. Lia1Nib1Coc1Mnd1M1e1M2f1O2-f1[??Chemical Formula 1] Lia2Nib2COc2Mnd2M3e2M4f2O2-f2[??Chemical Formula 2] Chemical Composition 1 and 2 of each composition and molar ratio is as defined in the specification. Each composition and molar ratio of Chemical Formula 1 and 2 is as defined in the specification.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: February 13, 2024
    Assignees: POSCO HOLDINGS INC., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, POSCO FUTURE M CO., LTD.
    Inventors: Kwon Young Choi, Jong Il Park, Sang Cheol Nam, Sang Hyuk Lee