Patents Assigned to Posco
  • Grain-oriented electrical steel sheet and manufacturing method therefor
    Patent number: 11667984
    Abstract: A grain-oriented electrical steel sheet according to an embodiment of the present includes Si at 1.0 wt % to 7.0 wt %, C at 0.005 wt % or less (excluding 0 wt %), In at 0.001 wt % to 0.5 wt %, and the remainder including Fe and other impurities unavoidably added thereto.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: June 6, 2023
    Assignee: POSCO CO., LTD
    Inventors: Hyung Don Joo, Min Soo Han, Hyung Ki Park, Sang Woo Lee, Jin-Wook Seo
  • Positive electrode active material for lithium secondary battery, method for preparing same, and lithium secondary battery comprising same
    Patent number: 11670766
    Abstract: A positive electrode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium transition metal composite oxide and doping metals doped in the lithium-transition metal composite oxide, wherein the doping metals includes at least two kinds and the average oxidation number of the doping metals is greater than 3.5.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: June 6, 2023
    Assignees: POSCO HOLDINGS INC., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Sang Cheol Nam, Jae Won Lee, Jong Il Park, Jae Myung Lee, Geun Gyung Park
  • Composition for forming insulation film of oriented electrical steel sheet, method for forming insulation film by using same, and oriented electrical steel sheet having insulation film formed therein
    Patent number: 11667985
    Abstract: The present invention relates to a composition for forming an insulation coating film of an oriented electrical steel sheet, including a first component (A) including a composite metal phosphate, a derivative thereof, or a mixture thereof, and a second component (B) including at least two colloidal silicas having different average particle diameters, a method for forming an insulation coating film using the same, and an oriented electrical steel sheet having an insulation coating film formed thereon.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: June 6, 2023
    Assignee: POSCO Co., Ltd
    Inventors: Min Soo Han, Hyung Don Joo, Hyung Ki Park, Jae-Keun Shin, Chang-Soo Kim
  • HOT PRESS-FORMED PART, AND MANUFACTURING METHOD THEREOF
    Publication number: 20230167531
    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: Application
    Filed: January 12, 2023
    Publication date: June 1, 2023
    Applicant: POSCO CO, LTD
    Inventors: Seong-Woo KIM, Jin-Keun OH, Sang-Heon KIM, Hyo-Sik CHUN
  • HOT ROLLED COATED STEEL SHEET HAVING HIGH STRENGTH, HIGH FORMABILITY, EXCELLENT BAKE HARDENABILITY AND METHOD OF MANFUACTURING SAME
    Publication number: 20230167523
    Abstract: The hot-rolled coated steel sheet comprising: in wt %, C: 0.05-0.14%, Si: 0.1-1.0%, Mn: 1.0-2.0%, P: 0.001-0.05%, S: 0.001-0.01%, AI: 0.01-0.1%, Cr: 0.005-1.0%, Ti: 0.005-0.13%, Nb: 0.005-0.03%, N: 0.001-0.01%, Fe residues, and other inevitable impurities; a mixed structure of ferrite and bainite as a main phase; and as a remaining structure, one or more selected from the group consisting of martensite, austenite, and phase martensite (MA), wherein a fraction of the ferrite and bainite is 95-99 area % and Equation 1 is satisfied. [Equation 1] FCO{110}<112>+FCO{112}<111>?10 where, FCO{110}<112> and FCO{112}<111>, each representing an area fraction occupied by a structure having ac crystal orientation of {110}<112> and {112}<111>.
    Type: Application
    Filed: January 31, 2023
    Publication date: June 1, 2023
    Applicant: POSCO Co., Ltd
    Inventors: Hyun-Taek Na, Sung-Il Kim
  • METHOD OF MANUFACTURING HOT PRESS-FORMED MEMBER HAVING EXCELLENT PRODUCTIVITY, WELDABILITY AND FORMABILITY
    Publication number: 20230158559
    Abstract: An method of manufacturing a hot press-formed member comprises heating a blank of an aluminum-based plated steel sheet in a heating furnace, removing the heated blank from the heating furnace and conveying the removed blank between an upper mold portion and a lower mold portion of a mold, mounted on a press, to be seated; and performing a forming process after the upper mold portion of the mold is in contact with the seated blank.
    Type: Application
    Filed: January 19, 2023
    Publication date: May 25, 2023
    Applicant: POSCO Co., Ltd
    Inventors: Hong Gee KIM, Hyun Sung SON
  • PROCESS CONTROL SYSTEM AND OPERATING METHOD THEREFOR
    Publication number: 20230160071
    Abstract: A process control system according to one embodiment of the present invention comprises: a first system for generating thickness information about an internal defect layer included in a carbon steel product; and a second system which receives the thickness information about the internal defect layer from the first system through a network, and which controls an etching process for removing at least a part of the internal defect layer from the carbon steel product by using the thickness information about the internal defect layer, wherein the first system provides the second system with a calculation module necessary for the second system to control the etching process, and the second system provides the first system with the information necessary for the first system to update the calculation module.
    Type: Application
    Filed: February 18, 2021
    Publication date: May 25, 2023
    Applicant: POSCO
    Inventors: Kyong-Su Park, Jung-Hyeung Lee, Chon-Kue Kim, Hyoung-Kuk Park, Deuk-Jung Kim
  • Ultrahigh-strength and high-ductility steel sheet having excellent cold formability
    Patent number: 11655517
    Abstract: The present invention relates to an automotive steel sheet and, more specifically, provides: an ultrahigh-strength and high-ductility steel sheet ensuring ultrahigh strength and high ductility and, simultaneously, having excellent cold formability due to a high yield strength ratio, and improved collision characteristics.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: May 23, 2023
    Assignee: POSCO CO., LTD
    Inventors: Joo-Hyun Ryu, Kyoo-Young Lee, Sea-Woong Lee
  • Preparation method for lithium phosphate, preparation method for lithium hydroxide, and preparation method for lithium carbonate
    Patent number: 11655150
    Abstract: The present invention relates to a method for producing lithium phosphate, comprising: passing a lithium-containing solution through an aluminum-based adsorbent to adsorb lithium on the aluminum-based adsorbent, passing the distilled water or an aqueous solution having a lower lithium concentration than the lithium-containing solution through the aluminum-based adsorbent on which the lithium is adsorbed to obtain a lithium-containing desorption solution, and putting a phosphorous supplying material in the lithium-containing desorption solution to obtain lithium phosphate.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: May 23, 2023
    Assignees: POSCO CO., LTD, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Hyun Woo Lee, Woonkyoung Park, Heok Yang, Kwang Seok Park, Seung Taek Kuk, Ki Young Kim, Sang Gil Lee, Woo Chul Jung, Gi-Chun Han, Juyoung Kim, Young-Seon Ko, Jin Yeop Wi
  • Manufacturing method of aluminum-based alloy plated steel
    Patent number: 11654654
    Abstract: The present disclosure relates to an aluminum-based plated steel that is provided for vehicles by hot forming, an aluminum-based alloy plated steel manufactured using the same, and method of manufacturing thereof.
    Type: Grant
    Filed: September 13, 2021
    Date of Patent: May 23, 2023
    Assignee: POSCO Co., Ltd
    Inventors: Jin-Keun Oh, Il-Ryoung Sohn, Seong-Woo Kim, Jeom-Soo Shin
  • NON-MAGNETIC AUSTENITIC STAINLESS STEEL
    Publication number: 20230151470
    Abstract: Provided is a non-magnetic austenitic stainless steel. According to an embodiment of the disclosed non-magnetic austenitic stainless steel, the non-magnetic austenitic stainless steel includes, in percent by weight (wt %), 0.01 to 0.1% of carbon (C), 1.5% or less (excluding 0) of silicon (Si), 0.5 to 3.5% of manganese (Mn), 16 to 22% of chromium (Cr), 7 to 15% of nickel (Ni), 3% or less of molybdenum (Mo), 0.01 to 0.3% of nitrogen (N), and the remainder of iron (Fe) and inevitable impurities, wherein a value of Expression (1) below is a negative value: (1) 3*(Cr+Mo)+5*Si?65*(C+N)?2*(Ni+Mn)?28, wherein in Expression (1), Cr, Mo, Si, C, N, Ni, and Mn denote contents (wt %) of the alloy elements, respectively.
    Type: Application
    Filed: December 30, 2020
    Publication date: May 18, 2023
    Applicant: POSCO
    Inventors: Kyunghun Kim, Hak Kim, Jisoo Kim, Jongjin Jeon
  • Ultra-thick steel material having excellent surface part NRL-DWT properties and method for manufacturing same
    Patent number: 11649518
    Abstract: Disclosed are a high-strength ultra-thick steel material and a method for manufacturing same. The high-strength ultra-thick steel material comprises in weight % 0.04-0.1% of C, 0.05-0.5% of Si, 0.01-0.05% of Al, 1.6-2.2% of Mn, 0.5-1.2% of Ni, 0.005-0.050% of Nb, 0.005-0.03% of Ti and 0.2-0.6% of Cu, 100 ppm or less of P and 40 ppm or less of S with a balance of Fe, and inevitable impurities, and comprises, in a subsurface area up to t/10 (t hereafter being referred to as the thickness of the steel material), bainite of 90 area % or greater (including 100 area %) as microstructures. And the particle size of crystallites having a high inclination angle boundary of 15° or higher measured by EBSD is 10 ?m or less (not including 0 ?m).
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: May 16, 2023
    Assignee: POSCO CO., LTD
    Inventors: Hak-Cheol Lee, Sung-Ho Jang
  • Thick steel plate having excellent cryogenic impact toughness and manufacturing method therefor
    Patent number: 11649515
    Abstract: The purpose of one aspect of the present invention is to provide: a thick steel plate capable of removing a conventional normalizing treatment required for ensuring toughness low temperature and cryogenic environments, and having properties equal to or better than those of a conventional steel subjected to the normalizing treatment; and a method for manufacturing the method.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: May 16, 2023
    Assignee: POSCO CO., LTD
    Inventors: Mo-Chang Kang, Jong-In Choi
  • Sour-resistant heavy-wall steel plate having excellent low-temperature toughness and post-heat treatment characteristics and method for manufacturing same
    Patent number: 11649519
    Abstract: Provided are: a SOUR-resistant heavy-wall steel plate having excellent low-temperature toughness and post-heat treatment characteristics; and a method for manufacturing the same. The SOUR-resistant heavy-wall steel plate of the present invention comprises: in terms of weight %, 0.02-0.06% of C; 0.5% or less of Si (excluding 0%); 0.8-2.0% of Mn; 0.03% or less of P; 0.003% or less of S; 0.06% or less of Al; 0.01% or less of N; 0.005-0.1% of Nb; 0.005-0.05% of Ti; 0.0005-0.005% of Ca; one or more selected from 0.05-0.5% of Ni, 0.05-0.5% of Cr, 0.02-0.4% of Mo, and 0.005-0.1% of V; and the remainder Fe and unavoidable impurities, wherein the heavy-wall steel plate satisfies relational expressions 1-3, and has a percent ductile fracture of 85% or more in the drop weight tear test (DWTT) at ?20° C.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: May 16, 2023
    Assignee: POSCO Co., Ltd
    Inventors: Seong-Ung Koh, Jae-Hyun Park, Moo-Jong Bae
  • Multi-layered zinc alloy plated steel having excellent spot weldability and corrosion resistance
    Patent number: 11649542
    Abstract: Provided is a multilayer zinc alloy plated steel material comprising a base steel material and multiple plating layers formed on the base steel material, wherein each of the multiple plating layers includes one of a Zn plating layer, a Mg plating layer, and a Zn—Mg alloy plating layer, and the ratio of the weight of Mg contained in the multiple plating layers to the total weight of the multiple plating layers is from 0.13 to 0.24.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: May 16, 2023
    Assignee: POSCO CO., LTD
    Inventors: Young-Jin Kwak, Goo-Hwa Kim, Mun-Jong Eom, Seok-Jun Hong, Kyoung-Pil Ko, Yong-Hwa Jung, Dong-Yoeul Lee, Tae-Yeob Kim, Kyung-Hoon Nam
  • FERRITIC STAINLESS STEEL HAVING IMPROVED SURFACE CHARACTERISTICS AND METHOD FOR MANUFACTURING SAME
    Publication number: 20230144381
    Abstract: Disclosed are a ferrite-based stainless steel having improved surface characteristics and a method for manufacturing same. The ferrite-based stainless steel according to the present invention includes, in percent by weight (wt %), 0.001 to 0.05% of C, 0.001 to 0.05% of N, 0.1 to 1.0% of Si, 0.1 to 1.0% of Mn, 12.0 to 22.0% of Cr, 0.01 to 1.0% of Ti, 0.01 to 1.0% of Nb, and the remainder of Fe and unavoidable impurities, wherein micro flaws having a length of 100 ?m or more are distributed at a density of 5 pieces/mm2 or less.
    Type: Application
    Filed: October 14, 2020
    Publication date: May 11, 2023
    Applicant: POSCO
    Inventors: Junghyun Kong, Jin-suk Kim, Manjin Ha, Hyunwoong Min, Hanhyuk Go, Mun-soo Lee
  • LOW-COST AUSTENITIC STAINLESS STEEL HAVING HIGH STRENGTH AND HIGH FORMABILITY, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20230142021
    Abstract: Disclosed are a low-cost austenitic stainless steel having high strength and high formability and a method for manufacturing same. The low-cost austenitic stainless steel having high strength and high formability according to an embodiment includes, greater than 0% and at most 0.08% of C, 0.2 to 0.25% of N, 0.8 to 1.5% of Si, 8.0 to 9.5% of Mn, 15.0 to 16.5% of Cr, greater than 0% and at most 1.0% of Ni, 0.8 to 1.8% of Cu, and the remainder of Fe and other unavoidable impurities and satisfies Expressions (1) to (4) below. Ni+0.47Mn+15N?7.5??(1) 23(C+N)+1.3 Si+0.24(Cr+Ni+Cu)+0.1Mn?12??(2) 551?462(C+N)?9.2Si?8.1Mn?13.7Cr?29(Ni+Cu)?70??(3) 11?1+45C?5Si+0.09Mn+2.2Ni?0.28Cr?0.67Cu+88.6N?17??(4) Here, C, N, Si, Mn, Cr, Ni, and Cu represent contents (wt %) of the elements, respectively.
    Type: Application
    Filed: February 2, 2021
    Publication date: May 11, 2023
    Applicant: POSCO
    Inventors: Seokweon Song, Jong-su Paek
  • FERRITIC STAINLESS STEEL HAVING IMPROVED CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20230144982
    Abstract: Disclosed are a ferritic stainless steel having improved corrosion resistance and a method for manufacturing same. The ferritic stainless steel according to an embodiment of the present disclosure includes, in percent by weight (wt%), 0.001 to 0.05% of C, 0.001 to 0.05% of N, 0.1 to 1.0% of Si, 0.1 to 1.0% of Mn, 12.0 to 22.0% of Cr, 0.01 to 1.0% of Ti, and 0.01 to 1.0% of Nb, with the balance being Fe and inevitable impurities, wherein an area ratio of microdefects is 2% or less, and a sulfur (S) content in a surface film within 5 mm from the surface is 10% or less.
    Type: Application
    Filed: October 14, 2020
    Publication date: May 11, 2023
    Applicant: POSCO
    Inventors: Jin-suk Kim, Junghyun Kong, Mun-soo Lee
  • Method for manufacturing zinc alloy plated steel material having excellent surface quality and corrosion resistance
    Patent number: 11643714
    Abstract: The present disclosure relates to a plated steel material that can be used in an automobile, a household appliance, a building material, and the like, and more particularly, to a zinc alloy plated steel material having excellent surface quality and corrosion resistance, and a method for manufacturing the same.
    Type: Grant
    Filed: April 26, 2022
    Date of Patent: May 9, 2023
    Assignee: POSCO CO., LTD
    Inventors: Il-Ryoung Sohn, Tae-Chul Kim, Jung-Kuk Kim, Kyung-Jin An, Jung-Hoon Kim, Jong-Un Jung, Jin-Seo Park
  • Steel material for welded steel pipe, having excellent longitudinal uniform elongation, manufacturing method therefor, and steel pipe using same
    Patent number: 11639535
    Abstract: The present invention relates to a steel material used for a line pipe for transporting crude oil or natural gas and the like and, more specifically, to a steel material for a welded steel pipe, having excellent longitudinal uniform elongation for the pipe, a manufacturing method therefor, and a steel pipe using the same.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: May 2, 2023
    Assignee: POSCO CO., LTD
    Inventor: Hwan-Gyo Jung