Patents Assigned to Posco
  • Patent number: 11512365
    Abstract: Disclosed are a wire rod and a manufacturing method therefor, the wire rod comprising, by weight %: 0.05-0.20% of C, 0.2% or less of Si, 5.0-6.0% of Mn, 0.020% or less of P, 0.020% or less of S, 0.010-0.050% of Al, 0.010-0.020% of N, and a balance of Fe and inevitable impurities and having a microcrystalline structure composed of two phases of austenite and ferrite, wherein the austenite has an area fraction of 15-25%.
    Type: Grant
    Filed: November 23, 2017
    Date of Patent: November 29, 2022
    Assignee: POSCO
    Inventors: Hyong-Jik Lee, Yum-Ho Choi
  • Patent number: 11511520
    Abstract: A composite material comprising a plastic layer; and a steel sheet laminated on one side or both sides of the plastic layer, and having a structure in which plastic particles are introduced onto the surface of the side where the plastic layer is laminated with the steel sheet and a method for producing the same are provided, wherein the composite material is capable of being used as automotive parts or structures, and the like.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: November 29, 2022
    Assignee: POSCO Co., Ltd
    Inventors: Hye Jin Yoo, Kangmin Lee, Jehoon Baek, Jung-Su Kim, Chang-Se Byeon
  • Publication number: 20220376236
    Abstract: The present exemplary embodiments relates to a negative electrode for a lithium secondary battery, a manufacturing method thereof, and a lithium secondary battery comprising the same. An exemplary embodiment may provide a negative electrode for a lithium secondary battery comprising current collector and a negative active material layer positioned on at least one surface of the current collector, and comprising a lithium metal layer, wherein the negative active material layer comprising the lithium metal layer, comprises a coating layer positioned on the current collector and comprising a metal seed, and a lithium metal layer positioned on the coating layer.
    Type: Application
    Filed: July 30, 2020
    Publication date: November 24, 2022
    Applicants: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Hongyoul BAE, Jin Hong KIM, Kyung Hwang LEE, Ji Hoon YANG, Jae Ho JUN, Sang Lag LEE, Weon Soo BAE
  • Publication number: 20220371049
    Abstract: The present invention relates to a surface treatment composition comprising, on the basis of 100 wt % of the solid part of the composition, 20-40 wt % of a water-soluble polyurethane resin, 40-60 wt % of a silane-based sol-gel resin in which three types of silane compounds are cross-linked, 5-15 wt % of a curing agent, 0.5-1.5 wt % of a corrosion inhibitor, 0.1-1.0 wt % of a molybdenum-based compound, 1.0-3.0 wt % of a silane coupling agent; 1.0-2.0 wt % of an organometallic complex, 1.0-2.0 wt % of an acid scavenger, 0.1-1.0 wt % of an aluminum-based compound, and 1.0-2.0 wt % of a lubricant. A ternary hot-dip galvannealed steel sheet treated with a chromium-free surface treatment coating agent, according to an exemplary embodiment in the present invention, has excellent resistance to blackening, alkali and corrosion, and provides excellent effects without concern for problems, in chromium treatment, of additional equipment installation, an increase in manufacturing costs and environmental pollution.
    Type: Application
    Filed: September 23, 2020
    Publication date: November 24, 2022
    Applicant: POSCO
    Inventors: Soo-Hyoun Cho, Won-Ho Son
  • Publication number: 20220372608
    Abstract: Embodiments of the present disclosure provides an aluminum alloy-plated steel sheet having high surface quality and weldability, a hot-formed member, and methods for manufacturing the aluminum alloy-plated steel sheet and the hot-formed member. The aluminum alloy-plated steel sheet includes: a base steel sheet; and an aluminum alloy plating layer formed on the base steel sheet, wherein the aluminum alloy plating layer includes, by weight %, Zn: 21% to 35%, Si: 1% to 6.9%, Fe: 2% to 12%, and the balance of Al and inevitable impurities.
    Type: Application
    Filed: December 11, 2020
    Publication date: November 24, 2022
    Applicant: POSCO
    Inventors: Hyeon-Seok Hwang, Suk-Kyu Lee, Jong-Gi Oh, Kwang-Tai Min, Dong-Seok Shin
  • Publication number: 20220371131
    Abstract: The purpose of the present invention is to provide, as a wire rod suitable for use as a substance for welding materials and, in particular, for welding rods, a wire rod for welding rods, having high tensile strength at room temperature and excellent drawing characteristics, and a manufacturing method therefor.
    Type: Application
    Filed: October 6, 2020
    Publication date: November 24, 2022
    Applicant: POSCO
    Inventors: Bong-Keun Lee, Sung-Hoon Chung
  • Publication number: 20220372603
    Abstract: Provided are high-strength steel plate having excellent low-temperature impact toughness and method of manufacturing the same. The present disclosure relates to a high-strength steel plate comprising, by weight %, carbon (C): 0.04-0.12%, silicon (Si): 0.1-0.5%, manganese (Mn): 1.2-2.5%, phosphorus (P): 0.01% or less, sulfur (S): 0.01% or less, aluminum (Al): 0.01-0.08%, niobium (Nb): 0.01-0.08%, chromium (Cr): 0.01-0.5%, nickel (Ni): 0.4-1.0%, copper (Cu): 0.5% or less, molybdenum (Mo): 0.01-0.5%, vanadium (V): 0.05% or less, titanium (Ti): 0.005-0.02%, boron (B): 0.001-0.0025%, nitrogen (N): 0.002-0.01%, the balance Fe and inevitable impurities, a Ceq value being less than 0.55.
    Type: Application
    Filed: October 26, 2020
    Publication date: November 24, 2022
    Applicant: POSCO
    Inventors: Tae-Il So, Sang-Deok Kang
  • Patent number: 11505843
    Abstract: An annealing separator for an oriented electrical steel sheet includes: a first component including a Mg oxide or a Mg hydroxide; and a second component including one kind among oxides and hydroxides of a metal selected from Al, Ti, Cu, Cr, Ni, Ca, Zn, Na, K, Mo, In, Sb, Ba, Bi, and Mn, or two or more kinds thereof.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: November 22, 2022
    Assignee: POSCO
    Inventors: Chang Soo Park, Jong Ho Park, Byung Deug Hong, Yun Su Kim
  • Patent number: 11505723
    Abstract: The present invention has been made in an effort to provide an adhesive coating composition capable of adhering (fastening) a non-oriented electrical steel sheet without using a conventional fastening method such as welding, clamping, or interlocking, a non-oriented electrical steel sheet stack to which the same is applied, and a manufacturing method thereof. According to an exemplary embodiment of the present invention, an adhesive coating composition includes: 40 to 99 wt % of a first component containing a water-soluble resin; and 1 to 60 wt % of a second component containing a composite metal phosphate.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: November 22, 2022
    Assignee: POSCO
    Inventors: Jung-Woo Kim, Bongwoo Ha, Changhoon Choi, Taeyoung No, Heon-Jo Choi, Won-Seog Bong
  • Patent number: 11505853
    Abstract: The present invention relates to a method for manufacturing a high strength and high toughness steel material which is mainly used at an extremely low temperature and used in various parts of ships for LNG transport and LNG fuel vehicles.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: November 22, 2022
    Assignee: POSCO
    Inventor: Jin-Ho Bae
  • Patent number: 11505845
    Abstract: The present invention relates to a soft high-silicon steel sheet, and more particularly, to a soft high-silicon steel sheet which has ductility even if the silicon content thereof is greater than 4%, and can thus be manufactured into a steel sheet having a high silicon content only by means of rolling without an additional siliconizing process. The soft high-silicon steel sheet may include a silicon content greater than 4 wt % and less than or equal to 7 wt % and 1 to 20% of chromium, or may include 5 to 7 wt % of Si+Al and 1 to 20 wt % of chromium.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: November 22, 2022
    Assignee: POSCO
    Inventors: Dong-Kyun Kim, Byung-Deug Hong, Seok-Hwan Choi
  • Patent number: 11508501
    Abstract: Provided is an oriented electrical steel sheet including: a forsterite film formed on one side or both sides of an oriented electrical steel sheet substrate; and a ceramic layer formed on an entire or partial region of the forsterite film. Provided is a manufacturing method for an oriented electrical steel sheet including: preparing an oriented electrical steel sheet having a forsterite film formed on one surface or both surfaces thereof; and forming a ceramic layer by spraying ceramic powder on the forsterite film.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: November 22, 2022
    Assignee: POSCO
    Inventors: Min Serk Kwon, Heon Jo Choi, Taeyoung No, Byung Deug Hong
  • Publication number: 20220364193
    Abstract: One aspect of the present invention is to provide a superior steel plate and a method for manufacturing same, the steel plate, as an ultra-thick steel plate, having high strength as well as superb imact toughness low-temperature, and excellent resistance to formation of cracks.
    Type: Application
    Filed: September 10, 2020
    Publication date: November 17, 2022
    Applicant: POSCO
    Inventors: Tae-Il So, Sang-Deok Kang
  • Publication number: 20220356542
    Abstract: Disclosed is a ferritic stainless steel with improved high temperature creep resistance. The disclosed ferritic stainless steel comprises by weight %: 0.005 to 0.03% of C, 0.005 to 0.03% of N, 0.05 to 0.9% of Si, 0.05 to 0.9% of Mn, 14.0 to 19.0% of Cr, 0.1 to 0.6% of Ti, 0.1 to 0.6% of Nb, 0.1 to 0.6% of Cu, 0.01 to 0.04% of P, 0.01% or less (excluding 0) of S, and the balance of iron (Fe) and inevitable impurities, and is characterized by satisfying Expressions (1) and (2) below. 0.5?Nb/Cu?3??Expression (1) 20?[2Nb+Ti]/[C+N]??Expression (2) wherein Nb, Cu, Ti, C, and N denote contents (wt %) of each element.
    Type: Application
    Filed: February 6, 2020
    Publication date: November 10, 2022
    Applicant: POSCO
    Inventors: Il Chan Jung, Hoi Hun Kim, Han Jin Ryu
  • Patent number: 11492499
    Abstract: Provided is a composite resin composition for steel plates for a fuel tank, including: 30 to 65% by weight of a polymer resin; 1 to 15% by weight of a curing agent; 2 to 20% by weight of a corrosion-resistant additive; 1 to 15% by weight of an adhesion promoting agent comprising a polyphosphazene polymer compound; and a residual solvent. A composite resin-coated steel plate for a fuel tank, and a manufacturing method for a composite resin-coated steel plate are provided.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: November 8, 2022
    Assignee: POSCO
    Inventors: Du-Hwan Jo, Sung-Kyu Kim
  • Patent number: 11492678
    Abstract: A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes, by weight %, Si: 2.5 to 6.0%, Al: 0.2 to 3.5%, Mn: 0.2 to 4.5%, Cr: 0.01 to 0.2%, P: 0.005 to 0.08%, Mg: 0.0005 to 0.05%, and a remainder including Fe and inevitable impurities, while satisfying Equation 1 below, and formed with an inner oxidation layer of a 0.2 to 5 ?m thickness inside a base steel sheet. ?2.5?[P]/[Cr]?[Mg]×100?6.5??[Equation 1] (In Equation 1, [P], [Cr], and [Mg] respectively represent a content (by wt %) of P, Cr, and Mg).
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: November 8, 2022
    Assignee: POSCO
    Inventors: Jae-Hoon Kim, Yong-Soo Kim, Jung-Woo Kim, Su-Yong Shin
  • Patent number: 11491764
    Abstract: The present invention provides an iron-aluminum-based plated steel sheet, and a manufacturing method therefor, the iron-aluminum-based plated steel sheet comprising a base steel sheet and a plated layer formed on the surface of the base steel sheet, wherein the alloy plated layer comprises: a diffusion layer comprising an Fe—Al-based intermetallic compound having a cubic structure; and an alloyed layer formed on the diffusion layer and composed of an alloy phase differing from that of the cubic structure, the thickness of the diffusion layer is 3-20 ?m, and the thickness of the diffusion layer is greater than 50% of the total thickness of the plated layer.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: November 8, 2022
    Assignee: POSCO
    Inventors: Jin-Keun Oh, Seong-Woo Kim, Sang-Heon Kim, Yeol-Rae Cho
  • Patent number: 11486019
    Abstract: The present invention relates to a non-oriented electrical steel sheet including 1.5 to 4.0 wt % of Si, 0.1 to 1.5 wt % of Al, 0.1 to 1.5 wt % of Mn, 0.005 wt % or less (excluding 0%) of C, 0.005 wt % or less (excluding 0%) of N, 0.005 wt % or less (excluding 0%) of Ti, 0.001 to 0.005 wt % of S, 0.1 wt % or less (excluding 0%) of P, 0.02 to 0.2 wt % of at least one of Sn and Sb, and a balance of Fe and other inevitable impurities; and satisfying the following Formulas 1, 2, and 3. 0.9?[Al]+[Mn]?2.1??[Formula 1] 0.2?([Si]+[Al]+[Mn]/2)*([P]+[Sn]+[Sb])?0.4??[Formula 2] (Gscenter?Gssurface)/(Gscenter*t)?0.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: November 1, 2022
    Assignee: POSCO
    Inventors: June Soo Park, Dae-Hyun Song
  • Patent number: 11484925
    Abstract: The present invention provides an apparatus for cutting a material, comprising: a frame body installed on a conveying path of a material; a cutting means, mounted on the frame body, for cutting an end portion of the material being conveyed; a laser preheating means for preheating the material by irradiating a laser beam onto the material before being conveyed to the cutting means; and a blocking and reflection means for blocking the laser beams reflected to the cutting means and re-reflecting the laser beam to the material.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: November 1, 2022
    Assignee: POSCO
    Inventors: Hyeong-Jun Huh, Choong-Soo Lim, Sung-Joon Kwak
  • Publication number: 20220341017
    Abstract: Provided are a plated steel sheet and a method for manufacturing same, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al plating layer provided on at least one surface of the base steel sheet; and an Fe—Al inhibition layer provided between the base steel sheet and the Zn—Mg—Al plating layer. The plating layer comprises, by weight %, 4 to 10% of Mg and 5.1-25% of Al and the remainder being Zn and unavoidable impurities with respect to components not including iron (Fe) diffused from the base steel sheet. The plating layer comprises a 24-50% MgZn2 phase in phase fraction. In the MgZn2 phase, an Al single phase is present in the ratio of 1-30% relative to the cross-sectional area of the total MgZn2 phase.
    Type: Application
    Filed: September 24, 2020
    Publication date: October 27, 2022
    Applicants: POSCO, STEEL & CONVERGENCE TECHNOLOGY RESEARCH ASSOCIATION, POSCO COATED & COLOR STEEL CO., LTD.
    Inventors: Sung-Joo Kim, Kyung-Kwan Park, Moon-Hi Hong, Heung-Yun Kim, Tae-Yeul Park, Myung-Soo Kim, Il-Ryoung Sohn, Tae-Chul Kim, Dae-Young Kang