Patents Assigned to Posco
  • Molten material treatment apparatus
    Patent number: 11203059
    Abstract: Provided is a molten material treatment apparatus including: a container having an upper portion, on which a molten material injection part is disposed, and a bottom part in which a hole is formed; a gas injection part attached to the bottom part between the molten material injection part and the hole; a chamber part formed on the upper portion of the container so as to face the gas injection part and having an inside open downward; and a plurality of vertical members disposed so as to cross a plurality of positions of a rotary flow region formed between the chamber part and the bottom part, wherein an inclusion removal efficiency can be improved while maintaining the molten material surface by a method in which a plurality of mutually different rotary flows are generated in a plurality of sections within the rotary flow region and are partially overlapped.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: December 21, 2021
    Assignee: POSCO
    Inventors: Hyun Jin Cho, Ju Han Choi, Sang Woo Han, Tae In Chung, Jang Hoon Kim
  • Ultra-high strength steel plate having excellent formability and hole-expandability, and method for manufacturing same
    Patent number: 11203795
    Abstract: Provided is an ultra-high strength steel plate for automobiles and, more specifically, to an ultra-high strength steel plate having high formability and hole expandability, and a method for manufacturing the ultra-high strength steel plate. The ultra-high strength steel plate includes: by wt %, carbon (C): 0.04% to 0.17%, silicon (Si): 2% or less, manganese (Mn): 4% to 10%, phosphorous (P): 0.05% or less (excluding 0%), sulfur (S): 0.02% or less (excluding 0%), aluminum (Al): 0.5% or less (excluding 0%), nitrogen (N): 0.02% or less (excluding 0%), and a balance of iron (Fe) and inevitable impurities. Carbon (C) and manganese (Mn) satisfy Formula C+(Mn/25)?0.46. The ultra high strength steel plate has a microstructure comprising retained austenite in a volume fraction of 20% or greater and annealed martensite in a volume fraction of 50% or greater.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: December 21, 2021
    Assignee: POSCO
    Inventors: Kyoo-Young Lee, Joo-Hyun Ryu, Sea-Woong Lee, Won-Hwi Lee, Byun-Mok Hwang
  • Single layer zinc alloy plated steel material exhibiting excellent spot weldability and corrosion resistance, and fabrication method therefor
    Patent number: 11203802
    Abstract: Provided are a single layer zinc alloy plated steel material and a fabrication method therefor, the single layer zinc alloy plated steel material comprising a base iron and a zinc alloy plating layer formed on the base iron, wherein the zinc alloy plating layer contains 13-24 wt % of Mg, and the adhesion amount of the zinc alloy plating layer is at most 40 g/m2 (excluding 0 g/m2).
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: December 21, 2021
    Assignee: POSCO
    Inventors: Young-Jin Kwak, Tae-Yeob Kim
  • Steel sheet for hot press formed member having excellent coating adhesion and manufacturing method for the same
    Patent number: 11198272
    Abstract: Provided is a steel sheet for a hot press formed member having excellent coating adhesion, and a method for manufacturing the same. A steel sheet for hot press forming is an aluminum alloy plated steel sheet, wherein an average Fe content in a plating layer may be 40 wt % or more, and a concentration gradient of a section having a Fe content of 45 wt % to 80 wt % in the plating layer may 7 wt %/?m or less of a concentration gradient at a section having an Fe content of 45% to 80% in the plating layer in a thickness direction from a surface of the plating layer according to a result of GDS analysis.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: December 14, 2021
    Assignee: POSCO
    Inventors: Seong-Woo Kim, Jin-Keun Oh, A-Ra Cho, Hyeon-Jeong Shin
  • Ultra-high strength steel sheet having excellent bendability and manufacturing method therefor
    Patent number: 11193189
    Abstract: Provided is an ultra-high strength steel sheet used as a material of a vehicle and, more specifically, to an ultra-high strength steel sheet having excellent bendability and a manufacturing method therefor. There is an effect of providing a steel sheet by utilizing a continuous annealing furnace without having water quenching equipment, thereby simultaneously ensuring a tensile strength of 1200 MPa or greater compared with that of conventional super high strength martensite steel and having excellent shape and bending properties.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: December 7, 2021
    Assignee: POSCO
    Inventors: Min-Seo Koo, Seong-Woo Kim
  • Zinc alloy plated steel having excellent weldability and corrosion resistance
    Patent number: 11192336
    Abstract: Provided are a zinc alloy plated steel and a method for manufacturing same, the zinc alloy plated steel comprising: a base iron; a Zn plated layer formed on top of the base iron; and a Zn—Mg alloy layer formed on top of the Zn plated layer and obtained through mutual diffusion of Zn and Mg, wherein the ratio of the weight of Mg contained in the Zn—Mg alloy layer with respect to the total weight of the Zn plated layer and the Zn—Mg alloy layer is 0.13 to 0.24, and the sum of the adhesion quantity of the Zn layer and the Zn—Mg alloy layer is no more than 40 g/m2 (more than 0 g/m2).
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: December 7, 2021
    Assignee: POSCO
    Inventors: Young-Jin Kwak, Du-Youl Choi
  • POSITIVE POLE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF, LITHIUM SECONDARY BATTERY
    Publication number: 20210376317
    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: Application
    Filed: December 18, 2018
    Publication date: December 2, 2021
    Applicants: POSCO, POSCO Chemical Co., Ltd., Research Institute of Industrial Science & Techology, POSCO Chemical Co., Ltd.
    Inventors: Sung Hwan Min, Jeong Han Kim, Jung Hoon Song
  • HIGH-STRENGTH FERRITIC STAINLESS STEEL FOR CLAMP AND METHOD FOR MANUFACTURING SAME
    Publication number: 20210371962
    Abstract: A high-strength ferritic stainless steel for clamp includes, in percent (%) by weight of the entire composition, C: 0.04 to 0.1%, Si: 0.2 to 0.6%, Mn: 0.01 to 1.5%, Cr: 14.0 to 18.0%, Al: 0.005 to 0.2%, V: 0.005 to 0.2%, N: 0.02 to 0.1%, the remainder of iron (Fe) and other inevitable impurities, and satisfies following formulas (1) and (2), and the number of precipitates with an average diameter of 0.5 ?m or less is 2.5×106 pieces/mid or more: (1) 0.35%?Si+Al+V?0.6% and (2) 0.09%?C+N?0.12%.
    Type: Application
    Filed: October 8, 2019
    Publication date: December 2, 2021
    Applicant: POSCO
    Inventors: Soo-Ho Park, Jae-Seok Park, Hyun Woong Min
  • Apparatus and method for controlling concentration of oxygen in heating furnace
    Patent number: 11187463
    Abstract: An apparatus for controlling the concentration of oxygen in a heating furnace according to one embodiment of the present invention may comprise: a first oxygen concentration bias setting unit for receiving a set first oxygen concentration bias; a second oxygen concentration bias calculation unit for, when a measured value of carbon monoxide in exhaust gas is out of an allowable carbon monoxide range, calculating a second oxygen concentration bias by using the measured value of carbon monoxide and the concentration of oxygen measured in the exhaust gas; an oxygen concentration bias providing unit for providing an oxygen concentration bias by using the first oxygen concentration bias and the second oxygen concentration bias; and an oxygen concentration set value correction unit for correcting a set value of the concentration of oxygen by using the oxygen concentration bias.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: November 30, 2021
    Assignees: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventor: Young-Il Kim
  • Hot rolled steel sheet having excellent strength and elongation
    Patent number: 11186892
    Abstract: Provided is a hot rolled steel sheet having excellent strength and elongation. The hot rolled steel sheet contains, by wt %: carbon (C): 0.05% or more and less than 0.4%, manganese (Mn): 10% to 15%, aluminum (Al): 2% or less, silicon (Si): 0.1 to 2%, molybdenum (Mo): 0.5% or less (excluding 0), vanadium (V): 0.5% or less (excluding 0), phosphorus (P): 0.01% or less, sulfur (S): 0.01% or less, and a remainder of iron (Fe) and inevitable impurities. The hot rolled steel sheet has a microstructure of the hot rolled steel sheet containing, by area %, tempered martensite: 50% to 70%, secondary martensite: 20% or less (excluding 0), epsilon martensite: 2% or less (excluding 0), and retained austenite: 8% to 30%. The hot rolled steel sheet has a tensile strength of at least 1500 MPa, a yield strength of at least 900 MPa and elongation of at least 20%.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: November 30, 2021
    Assignees: POSCO, POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Sung-Hak Lee, Kyoo-young Lee, Joo-Hyun Ryu, Sea-Woong Lee, Seok-Su Sohn, Hyung-Soo Lee, Min-Chul Jo
  • Grain-oriented electrical steel plate and production method therefor
    Patent number: 11180819
    Abstract: Provided is an oriented electrical steel sheet including a groove existing on the surface of the electrical steel sheet and a forsterite layer formed on a part or all of the surface of the electrical steel sheet, in which forsterite which is extended from the forsterite layer and penetrates to a base steel sheet in an anchor form is present on the surface of the side of the groove.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: November 23, 2021
    Assignee: POSCO
    Inventors: Oh-Yeoul Kwon, Seung Gon Lee, Hyun-Chul Park, Jung Hun Park, Seong-Kyu See, Sung-Yeun Won, Jae-Kyoum Kim, Jong-Tae Park, Se Min Park
  • Annealing separator composition for oriented electrical steel sheet, oriented electrical steel sheet, and method for manufacturing oriented electrical steel sheet
    Patent number: 11174525
    Abstract: The present invention has been made in an effort to provide an annealing separator component for an oriented electrical steel sheet, an oriented electrical steel sheet, and a manufacturing method thereof. According to an exemplary embodiment of the present invention, an annealing separator composition for an oriented electrical steel sheet, includes: 100 weight parts of at least one of magnesium oxide and magnesium hydroxide; and 5 to 200 weight parts of aluminum hydroxide.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: November 16, 2021
    Assignee: POSCO
    Inventors: Min Soo Han, Jong-Tae Park, Yun Su Kim, Chang Soo Park
  • Aluminum-based plated steel having excellent corrosion resistance, aluminum-based alloy plated steel using the same, and method of manufacturing thereof
    Patent number: 11167527
    Abstract: Provided is 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: December 21, 2017
    Date of Patent: November 9, 2021
    Assignee: POSCO
    Inventors: Jin-Keun Oh, Il-Ryoung Sohn, Seong-Woo Kim, Jeom-Soo Shin
  • Plated steel sheet having fine and even plating structure
    Patent number: 11168389
    Abstract: Provided is a plated steel sheet having an excellent quality with fine and even plating texture, the plated steel sheet including a base steel sheet and a Zn plating layer formed on the base steel sheet, wherein a Zn crystal in the plating layer has a size of 5 ?m or less.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: November 9, 2021
    Assignee: POSCO
    Inventor: Su Young Kim
  • Annealing separator composition for oriented electrical steel sheet, oriented electrical steel sheet, and method for manufacturing oriented electrical steel sheet
    Patent number: 11168376
    Abstract: The present invention provides an annealing separator composition for a grain-oriented electrical steel sheet, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet. An annealing separator composition for a grain-oriented electrical steel sheet according to an embodiment of the present invention comprises: 100 parts by weight of at least one of magnesium oxide and magnesium hydroxide; 5 to 200 parts by weight of aluminum hydroxide; and 0.1 to 20 parts by weight of a boron compound.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: November 9, 2021
    Assignee: POSCO
    Inventors: Min Soo Han, Jong-Tae Park, Chang Soo Park, Yunsu Kim
  • Apparatus and method for feeding material
    Patent number: 11167347
    Abstract: A material feeding apparatus is disclosed. An apparatus for removing a surface oxide of a metal material and feeding the metal material to a melting furnace, according to an embodiment of the present disclosure, includes: a housing including a material dropping chamber for feeding and discharging the metal material and a material etching chamber for performing a plasma etching process; and a pretreatment casing configured to reciprocate between the material dropping chamber and the material etching chamber in the housing, wherein the pretreatment casing receives the metal material from the material dropping chamber to store the metal material, moves to the material etching chamber to plasma-etch a surface oxide layer of the stored metal material, and then returns to the material dropping chamber to drop the etched metal material into the melting furnace.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: November 9, 2021
    Assignee: POSCO
    Inventors: Seung Ho Lim, Goo Hwa Kim, Kyung Hoon Nam, Yeong Seon Park
  • Non-oriented electrical steel sheet and method for producing same
    Patent number: 11162155
    Abstract: A non-grain oriented electrical steel sheet according to an exemplary embodiment of the present invention includes Si: 1.0 to 4.0%, Mn: 0.1 to 1.0%, Al: 0.1 to 1.5%, Zn: 0.001 to 0.01% B: 0.0005 to 0.005%, and a balance including Fe and inevitable impurities.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: November 2, 2021
    Assignee: POSCO
    Inventors: June Soo Park, Dae Hyun Song
  • Pressure vessel steel having excellent hydrogen induced cracking resistance, and manufacturing method therefor
    Patent number: 11155906
    Abstract: The present invention relates to pressure vessel steel to be used in a hydrogen sulfide atmosphere, and relates to pressure vessel steel having excellent resistance to hydrogen induced cracking (HIC), and a manufacturing method therefor.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: October 26, 2021
    Assignee: POSCO
    Inventors: Dae-Woo Kim, Jong-Kyo Choi, Young-Jin Jung
  • Enhanced wear resistant steel and methods of making the same
    Patent number: 11155905
    Abstract: Improved steel compositions and methods of making the same are provided. The present disclosure provides advantageous wear resistant steel. More particularly, the present disclosure provides high manganese (Mn) steel having enhanced wear resistance, and methods for fabricating high manganese steel compositions having enhanced wear resistance. The advantageous steel compositions/components of the present disclosure improve one or more of the following properties: wear resistance, ductility, crack resistance, erosion resistance, fatigue life, surface hardness, stress corrosion resistance, fatigue resistance, and/or environmental cracking resistance. In general, the present disclosure provides high manganese steels tailored to resist wear and/or erosion.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: October 26, 2021
    Assignees: ExxonMobil Research and Engineering Company, POSCO
    Inventors: Hyunwoo Jin, Ning Ma, Raghavan Ayer, Russell Robert Mueller, Hak-Cheol Lee, Jong-Kyo Choi, In-Shik Suh
  • Magnesium alloy plate and method for manufacturing same
    Patent number: 11149330
    Abstract: According to an exemplary embodiment of the present invention, a manufacturing method of a magnesium alloy plate includes: (a) solution-treating a magnesium casting material containing 0.5 to 10 wt % of zinc (Zn), 1 to 15 wt % of aluminum (Al), and a balance of magnesium (Mg) and inevitable impurities at 300 to 500° C. for 1 to 48 hours; (b) pre-heating the solution-treated magnesium casting material at 300 to 500° C.; and (c) of rolling the pre-heated magnesium casting material together with a constraint member selected by following Relational Expression 1 to satisfy Relational Expressions 2 and 3; and (d) solution-treating a thus-rolled magnesium alloy plate at 300 to 500° C. for 0.5 to 5 hours. Relational Expressions 1 to 3 are as described in the specification.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: October 19, 2021
    Assignee: POSCO
    Inventors: Hyun-Taek Na, In Shik Suh, Seok Jong Seo, Sung Il Kim