Patents Assigned to Posco
  • Patent number: 10643771
    Abstract: A method of manufacturing a non-oriented electrical steel sheet is disclosed. A method of manufacturing a non-oriented electrical steel sheet according to the present invention includes reheating slab consisting of Si: 2.0-4.0%, acid-soluble Al: 0.01-0.04%, Mn: 0.20% or less, Sb: 0.005-0.10%, N: 0.005% or less, S:0.005% or less, C: 0.005-0.015%, Fe in a balance amount, and other inevitable impurities in weight percent (wt %); hot rolling the slab to prepare a hot rolled steel sheet; cold rolling the hot rolled steel sheet to prepare a cold rolled steel sheet; primarily recrystallization-annealing the cold rolled steel sheet; and high-temperature annealing the cold rolled steel sheet subjected to the primarily recrystallization-annealing.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: May 5, 2020
    Assignee: POSCO
    Inventors: Hunju Lee, Sang-Woo Lee, Su-Yong Sin
  • Patent number: 10640840
    Abstract: An HPF molding member having a melted aluminum plating layer formed on the surface of a base steel sheet and excellent delamination resistance. The base steel sheet comprises: 0.18-0.25% by weight of C; 0.1-1.0% by weight of Si; 0.9-1.5% by weight of Mn; 0.03% by weight or less of P; 0.01% by weight or less of S; 0.01-0.05% by weight of Al; 0.05-0.5% by weight of Cr; 0.01-0.05% by weight of Ti; 0.001-0.005% by weight of B; 0.009% by weight or less of N; and the balance Fe and other impurities. The plating layer consists of a soft diffusion layer and a hard alloy layer, the hard alloy layer having a tau layer irregularly and non-continuously dispersed and distributed on the inside thereof at 10% or more of the entire area fraction. The difference in hardness between the alloy layer and the diffusion layer is 400 (Hv) or less.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: May 5, 2020
    Assignee: POSCO
    Inventors: Heung-Yun Kim, Il-Ryoung Sohn, Dae-Chul Bae
  • Patent number: 10626476
    Abstract: A high specific strength steel sheet and a method for manufacturing same are disclosed. The high specific strength steel sheet, which is an aspect of the present invention, is characterized in that an Fe—Al-based intermetallic compound having an average particle diameter of 20 ?m or less is homogeneously dispersed in an austenite matrix, the volume fraction of the Fe—Al-based intermetallic compound is 1 to 50%, and the volume fraction of ?-carbide ((Fe,Mn)3AlC) which is a perovskite carbide and has an L12 structure is 15% or less.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: April 21, 2020
    Assignees: POSCO, Postech Academy-Industry Foundation
    Inventors: Han-Soo Kim, Nack-Joon Kim, Yoon-Uk Heo, Sang-Heon Kim, Jae-Sang Lee, Jin-Mo Koo
  • Patent number: 10626504
    Abstract: The present invention relates to a plated steel sheet for hot press forming, a hot-press forming member manufactured using the same, and a manufacturing method thereof. The plated steel sheet comprises: a base steel sheet and a composite plated layer that is formed on at least one surface of the base steel sheet, and has a Mn-based plated layer and an Al-based plated layer alternately formed therein, an Al-based plated layer being formed on the uppermost layer thereof, wherein the composite plated layer has a total thickness of 5 to 30 ?m, and in this case, the Mn-based plated layer accounts for 5 to 60% of the total thickness.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: April 21, 2020
    Assignee: POSCO
    Inventors: Myung-Soo Kim, Hyeon-Seok Hwang, Young-Jin Kwak
  • Patent number: 10619995
    Abstract: A dimension measuring device includes: a rail for moving two sheets of material; a plurality of range finders arranged at a preset interval along a direction of traveling of the material, so as to measure a distance from side surfaces of the material; and an imaging device for taking images between the first and second range finders, which are disposed at the first and second locations with reference to the entry side of the material, respectively.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: April 14, 2020
    Assignee: POSCO
    Inventors: Choong Soo Lim, Hyeong Jun Huh, Sung Joon Kwak
  • Patent number: 10619006
    Abstract: The present invention relates to a double metal cyanide catalyst comprising a polyether compound, a metal salt, a metal cyanide salt, and an organic complexing agent having an acetate group or a tartrate group; a preparation method therefor; and a method for preparing a polycarbonate polyether polyol by copolymerizing carbon dioxide and an epoxy compound in the presence of the catalyst. According to the present invention, the double metal cyanide catalyst has excellent in catalytic activity and has a short catalytic activity induction time, according to an embodiment of the present invention, the process for preparing the catalyst of the present invention is eco-friendly and simple in process, since an amount of the organic complexing agent to be used is small, and has a simple process.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: April 14, 2020
    Assignees: POSCO, RESEARCH INSTITUE OF INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Joon-Hyun Baik, Il Kim, Seong-Hwan Yun, Jae-Hee Ha, Seong-Jin Byeon
  • Patent number: 10619228
    Abstract: The present invention relates to an aluminum-magnesium coated steel plate using vacuum coating, wherein an aluminum-magnesium coating layer is constituted by 1 to 45 wt % of magnesium, a balance of aluminum, and other inevitable impurities, and an Al3Mg2 alloy phase is formed in the aluminum-magnesium coating layer by performing heat treatment of the steel plate.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: April 14, 2020
    Assignees: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Ji Hoon Yang, Jae In Jeong, Tae-Yeob Kim, Yonghwa Jung
  • Publication number: 20200109464
    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: May 31, 2018
    Publication date: April 9, 2020
    Applicant: POSCO
    Inventors: Seong-Woo KIM, Jin-Keun OH, Yeol-Rae CHO
  • Patent number: 10604817
    Abstract: Provided is a high-strength steel plate for a pressure vessel having excellent low temperature toughness after a post weld heat treatment (PWHT). The high-strength steel plate for a pressure vessel includes: by wt %, 0.02-0.15% of carbon (C), 0.05-0.50% of silicon (Si), 1.0-2.0% of manganese (Mn), 0.005-0.1% of aluminum (Al), 0.015% or less of phosphorus (P), 0.0015% or less of sulfur (S), 0.01-0.03% of niobium (Nb), 0.01-0.03% of vanadium (V), 0.01-0.03% of titanium (Ti), 0.005% or less of chromium (Cr), 0.005% or less of molybdenum (Mo), 0.02-0.50% of copper (Cu), 0.05-0.60% of nickel (Ni), 0.0002-0.0010% of boron (B), 0.0035-0.0065% of nitrogen (N), and a balance of iron (Fe) and other inevitable impurities. A microstructure of the high-strength steel plate includes a complex structure of ferrite having an area fraction of 35-40% and a balance of bainite, and the bainite has a packet size of 15 ?m or less.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: March 31, 2020
    Assignee: POSCO
    Inventors: Dae-Woo Kim, Kyung-Keun Um
  • Patent number: 10604820
    Abstract: Provided is a method of continuously annealing a strip. The method includes: firstly heating a strip in a first heating zone; firstly cooling the firstly heated strip or maintaining the firstly heated strip at a constant temperature in a first cooling or constant temperature maintaining zone; secondarily heating and soaking the strip, firstly cooled or remaining at the constant temperature, in a second heating and soaking zone; and secondarily cooling the strip, secondarily heated and soaked, in a second cooling zone.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: March 31, 2020
    Assignee: POSCO
    Inventors: Jai-Hyun Kwak, Kyoo-Young Lee, Hang-Sik Cho, Joo-Hyun Ryu, Man-Young Park
  • Patent number: 10601035
    Abstract: A method of manufacturing core-shell particles comprises: filling a buffer into a rotor, which is extended in a longitudinal direction, and is accommodated so as to be spaced apart from an inner wall side of a non-rotational hollow cylinder extended in a longitudinal direction and then discharging air to outside; rotating the rotor after terminating the filling; forming a core-shell precursor by supplying raw materials from a first storage and a second storage, which comprise a material forming a core, into an interior of the cylinder in which the rotor rotates; supplying a shell material for coating the core to the interior of the cylinder in which a core-type precursor is formed; separating a liquid comprising core-shell particles formed through the supplying into a solid and a liquid; and drying the core-shell particles obtained through the separating.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: March 24, 2020
    Assignees: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Jong Pal Hong, Jung Hoon Song, Geun Hwangbo, Gyeong Rye Choi
  • Publication number: 20200087760
    Abstract: An embodiment of the present invention provides: an adhesive coating composition capable of attaching (coupling) an electrical steel sheet without using an existing coupling method, such as welding, clamping, or interlocking; an electrical steel sheet laminate employing the same; and a manufacturing method therefor. The adhesive coating composition according to an embodiment of the present invention comprises: 40-95 wt % of a first component comprising an organic/inorganic composite in which inorganic nanoparticles are substituted in a water-soluble resin; 1-50 wt % of a second component comprising a composite metal phosphate; and 1-10 wt % of an additive.
    Type: Application
    Filed: December 21, 2017
    Publication date: March 19, 2020
    Applicant: POSCO
    Inventors: Jung-Woo Kim, Bongwoo Ha, Taeyoung No, Won-Seog Bong
  • Patent number: 10590522
    Abstract: An Al—Fe alloy coated steel sheet includes a base steel sheet and an alloy coating layer, wherein the base steel sheet includes, by wt %, C: 0.1%˜0.5%, Si: 0.01%˜2%, Mn: 0.01%˜10%, P: 0.001%˜0.05%, S: 0.0001%˜0.02%, Al: 0.001%˜1.0%, N: 0.001%˜0.02%, and the balance of Fe and other impurities, wherein the alloy coating layer includes: an Al—Fe alloy layer I formed on the base steel sheet and having a Vickers hardness of 200˜800 Hv; an Al—Fe alloy layer III formed on the Al—Fe alloy layer I and having a Vickers hardness of 700˜1200 Hv; and an Al—Fe alloy layer II formed in the Al—Fe alloy layer III continuously or discontinuously in a length direction of the steel sheet, and having a Vickers hardness of 400˜900 Hv, wherein an average oxygen content at a depth of 0.1 ?m from a surface of the oxide layer is 20% or less by weight.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: March 17, 2020
    Assignee: POSCO
    Inventors: Jin-Keun Oh, Yeol-Rae Cho, Il-Ryoung Sohn, Yong-Soo Kim
  • Patent number: 10584407
    Abstract: Zn alloy plated steel material having excellent weldability and processed-part corrosion resistance and a method for production of Zn alloy plated steel material are provided. In the Zn alloy plated steel material comprising base steel material and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.1-5.0%, Mg: 0.1-5.0%, as well as a remainder of Zn and inevitable impurities. The Zn alloy plated steel material includes a lower interface layer and an upper interface layer between the base steel material and the Zn alloy plating layer, wherein the lower interface layer is formed on the base steel material and has a dense structure, and the upper interface layer is formed on the lower interface layer and has a network-type or island-type structure.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: March 10, 2020
    Assignee: POSCO
    Inventors: Min-Suk Oh, Sang-Heon Kim, Tae-Chul Kim, Jong-Sang Kim, Hyun-Chu Yun, Bong-Hwan Yoo, Il-Ryoung Sohn
  • Patent number: 10584396
    Abstract: The present invention relates to a formed product used in vehicle components and the like, and to a method for manufacturing the same. The present invention provides heat treatable steel, a formed product using the same having ultra-high strength and excellent durability, and a method for manufacturing the same, wherein the heat treatable steel contains, in wt %, C (0.22-0.42%), Si (0.05-0.3%), Mn (1.0-1.5%), Al (0.01-0.1%), P (0.01% or less (including 0), S (0.005% or less), Mo (0.05-0.3%), Ti (0.01-0.1%), Cr (0.05-0.5%), B (0.0005-0.005%), N (0.01% or less), the balance Fe, and other inevitable impurities, Mn and Si satisfying Relationship formula (1), below, Mo/p satisfying Relationship formula (2), below: [Relationship formula 1] Mn/Si?5 [Relationship formula 2] Mo/P?15.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: March 10, 2020
    Assignee: POSCO
    Inventors: Yeol-Rae Cho, Jae-Hoon Lee, Ki-Hyun Park
  • Patent number: 10576556
    Abstract: Provided is a cutter apparatus for machining a difficult-to-machine material, the cutter apparatus including: a cutting tool body which has a fastening portion formed at a center thereof; one or more cutters which are installed on the cutting tool body, and have superhard insert tips fixed to end portions thereof, respectively; and an angle adjusting unit which is installed in an internal space of the cutters, and adjusts angles of the cutters by spreading or retracting the cutters, so that angles of the cutters may be easily adjusted in accordance with a condition for cutting a difficult-to-machine material, in order to prevent damage to the superhard insert tips when machining a difficult-to-machine material having high hardness and high toughness.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: March 3, 2020
    Assignees: POSCO, Research Institute of Industrial Science and Technology
    Inventors: Kwang Soo Park, Sook Hwan Kim
  • Patent number: 10570493
    Abstract: The present invention relates to: a steel sheet for hot press forming that is used for vehicle parts and the like and, more particularly, to a steel sheet for hot press forming with excellent corrosion resistance and weldability; a forming member; and a manufacturing method therefor.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: February 25, 2020
    Assignee: POSCO
    Inventors: Myung-Soo Kim, Hyeon-Seok Hwang
  • Patent number: 10563316
    Abstract: The present invention relates to an Fe—P—Cr alloy thin plate and a method for manufacturing the same. An embodiment of the present invention provides an Fe—P—Cr alloy thin plate including, in terms of wt %, P (6.0-13.0%), Cr (0.002-0.1%), and the balance of Fe and other inevitable impurities.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: February 18, 2020
    Assignee: POSCO
    Inventors: Dongkyun Kim, Hongseok Yang
  • Patent number: 10563280
    Abstract: The present invention relates to a high-strength and high-manganese steel sheet suitable for an outer panel or a vehicle body of a transport vehicle and, more specifically, to a high-strength and high-manganese steel sheet having excellent vibration-proof properties and a method for producing the same.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: February 18, 2020
    Assignee: POSCO
    Inventors: Sung-Kyu Kim, Kwang-Geun Chin, Tae-Jin Song, Tai-Ho Kim, Won-Tae Cho, Sun-Ho Jeon
  • Patent number: 10556404
    Abstract: A non-oriented electrical steel sheet composition, a manufacturing method of the non-oriented electrical steel sheet product, and a non-oriented electrical steel sheet product are provided, and the non-oriented electrical steel sheet composition includes a first composition including a soluble epoxy resin and an inorganic nanoparticle of SiO2, TiO2, ZnO, or combinations thereof, and an inorganic additive of phosphoric acid (H3PO4), sodium hydroxide (NaOH), or a combination thereof, wherein the inorganic nanoparticle is substituted in a terminal substituent group of the soluble epoxy resin, and the epoxy resin is a multifunctional epoxy resin in which there are three or more epoxy groups.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: February 11, 2020
    Assignee: POSCO
    Inventors: Jung Woo Kim, Heon-Jo Choi, Byung-Chul Kim