Patents Assigned to Posco
  • 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
  • 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
  • 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 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
  • WIRE ROD AND PART, HAVING IMPROVED DELAYED FRACTURE RESISTANCE, FOR USE IN BOLT AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240052454
    Abstract: Disclosed are high-strength wire rods and parts, having improved delayed fracture resistance, for use in bolts, and a methods for manufacturing the same. The high-strength wire rod, having improved delayed fracture resistance, for use in bolts according to the present disclosure contains, by wt %, 0.15-0.30% of C, 0.05-0.35% of Si, 0.95-1.35% of Mn, 0.030% or less of P, 0.030% or less of S, 0.005-0.030% of Ti, 0.0010-0.0040% of B, and Fe and inevitable impurities as the balance.
    Type: Application
    Filed: December 14, 2021
    Publication date: February 15, 2024
    Applicant: POSCO CO., LTD
    Inventors: Youngsoo CHUN, Seok-hwan CHOI, Kyoungsik KIM, Myungsoo CHOI
  • 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
  • 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
  • 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
  • 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
  • MARTENSITIC STAINLESS STEEL WITH EXCELLENT HARDENABILITY
    Publication number: 20240043973
    Abstract: Disclosed is a martensitic stainless steel with excellent hardenability through the control of a component system. The martensitic stainless steel with excellent hardenability comprises, in percent by weight (wt %), 0.01 to 0.1% of C, 0.05 to 0.1% of Si, 0.05 to 1.0 of Mn, 11.0 to 14.0% of Cr, 0.05 to 1.0% of Ni, 0.05 to 2.0% of Cu, to 0.08% of N, and the balance of Fe and inevitable impurities, and satisfies Formula (1). 1.0?Mn+Ni+Cu?2.5, ??Formula (1): wherein Mn, Ni, and Cu denote contents (wt %) of elements, respectively.
    Type: Application
    Filed: December 10, 2021
    Publication date: February 8, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Hyung-gu Kang, Dong-hoon Kim, Gyujin Jo
  • HIGH STRENGTH ZINC-PLATED STEEL SHEET HAVING EXCELLENT UNIFORM SPOT WELDABILITY ALONG WIDTH DIRECTION AND MANUFACTURING METHOD THEREOF
    Publication number: 20240043947
    Abstract: According to an aspect of the present invention, provided are a high strength zinc-plated steel sheet having excellent uniform spot weldability along the width direction, and a manufacturing method thereof.
    Type: Application
    Filed: December 7, 2021
    Publication date: February 8, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Ki-Cheol Kang, Dae-Young Kang, Tae-Chul Kim, Seul-Gi So, Myung-Soo Kim, Jong-Sang Kim
  • SOLUTION FOR ELECTROPLATING IRON, AND ELECTROPLATED STEEL SHEET MANUFACTURED BY USING SAME
    Publication number: 20240044032
    Abstract: The present invention relates to a solution for electroplating iron, comprising: iron ions comprising first iron ions and second iron ions; a complexing agent; and unavoidable impurities, wherein the amount of second iron ions among the iron ions is 5 to 60 wt %. According to the present invention, electroplating efficiency is high, there is no drop in electroplating efficiency due to a continuous plating operation, and sludge generation is prevented, and, thus, the plating solution is easily managed. Burning can be prevented even in a high current density operation, and, thus, a high-quality iron-plated layer can be achieved. The plating solution does not need to be replaced, as the concentration of second iron ions generated by a plating reaction is maintained to be constant, and, thus, the present invention is appropriate for a continuous plating process.
    Type: Application
    Filed: December 14, 2020
    Publication date: February 8, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Jin-Ho Jung, Won-Hwi Lee, Sang-Bae Lim
  • HIGH STRENGTH HOT-DIP GALVANIZED STEEL SHEET HAVING EXCELLENT COATABILITY AND METHOD OF MANUFACTURING SAME
    Publication number: 20240043954
    Abstract: One embodiment of the present invention provides a high-strength hot-dip galvanized steel sheet having excellent coatability and a manufacturing method therefor, the hot-dip galvanized steel sheet having a base steel sheet and a hot-dip galvanized layer formed on one or both surfaces of the base steel sheet, wherein the base steel sheet comprises an internal oxide layer comprising, by weight %, carbon (C): 0.1% to 0.3%, silicon (Si): 0.1% to 2.0%, aluminum (Al): 0.1% to 1.5%, manganese (Mn): 1.5% to 3.0%, and the balance being Fe and unavoidable impurities, wherein the sum of Si and Al satisfies 1.2% to 3.5%, the ratio of Al and Si (Al/Si) satisfies 0.5 to 2.0, the surface roughness (Ra) of the base steel sheet is 0.5 or more, and the thickness directly under the surface of the base steel sheet is less than 4 ?m.
    Type: Application
    Filed: December 9, 2021
    Publication date: February 8, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Young-Ha Kim, Suk-Kyu Lee, Tae-Kyo Han, Dae-Young Kang
  • WELDED STRUCTURAL MEMBER HAVING EXCELLENT CRACK RESISTANCE AND MANFUACTURING METHOD THEREOF
    Publication number: 20240042541
    Abstract: The present invention relates to a welded structural member having excellent corrosion resistance and crack resistance, and a method for manufacturing same.
    Type: Application
    Filed: December 20, 2021
    Publication date: February 8, 2024
    Applicant: POSCO Co., Ltd
    Inventor: Young-Hune Kim
  • WIRE ROD FOR CONCRETE REINFORCING STEEL FIBER, STEEL FIBER, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20240043949
    Abstract: Provided is a wire rod for a concrete reinforcing steel fiber, a steel fiber, and a manufacturing method therefor. According to one disclosed embodiment of a wire rod for a concrete reinforcing steel fiber, the wire rod comprises, by weight, C: 0.01 to 0.04%, Si: 0.07 to 0.3%, Mn: 1.0 to 2.0%, P: 0.1 to 0.3% and the balance of Fe and other unavoidable impurities, wherein, when the radius of the wire rod is r, in a region from the center of a cross section perpendicular of the longitudinal direction to 0.95*r, the area fraction of ferrite is 90% or more, and the remainder comprises pearlite, wherein the average grain size of the ferrite may be 30 ?m or less and the colony size of the pearlite may be 10 ?m or less.
    Type: Application
    Filed: December 13, 2021
    Publication date: February 8, 2024
    Applicant: POSCO CO., LTD
    Inventors: Yo-sep YANG, Jaeseung LEE, Je-wook JANG, Manjae LEE