Patents Assigned to Posco
  • Hot-rolled steel sheet for high strength galvanized steel sheet, having excellent surface quality, and method for producing same
    Patent number: 10533241
    Abstract: The present invention relates to a hot-rolled steel sheet for a high strength galvanized steel sheet, having excellent surface quality, and a method for producing the same, the hotrolled steel sheet comprising, by weight %: C: 0.08 to 0.2%, Si: 0.03 to 0.15%, Mn: 1.4 to 2%, P: 0.001 to 0.05%, S: 0.001 to 0.03%, Al: 0.002 to 0.05%, and the remainder being Fe and unavoidable impurities. The weight ratio of Mn/Si is 20 to 30, the weight ratio of C/Si is 1 to 5, and the weight ratio of Si/P is 3 to 10. The hot-rolled steel sheet has a microstructure consisting of, in area fraction, 10 to 40% of bainite, 20 to 30% of pearlite and 40 to 60% of ferrite, and includes a ternary eutectic compound of FeO, Fe2SiO4 and Fe3(PO4)2 formed within 50 ?m from the surface.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: January 14, 2020
    Assignee: POSCO
    Inventors: Young-Ha Kim, Hyo Jung Kwak, Seok Jong Seo
  • Hot press forming parts having excellent bending properties and method for manufacturing the same
    Patent number: 10533237
    Abstract: Provided is a method for manufacturing an HPF part having excellent bending properties including: manufacturing a hot rolled steel sheet; coiling the hot rolled steel sheet within a range of 450° C. to 750° C. for a time satisfying Expression 1; cold rolling, annealing and then hot dip aluminum plating on the annealed steel sheet; heating the hot dip aluminum plated steel sheet to a temperature of 850° C. to 1000° C. and maintaining the hot dip aluminum plated steel sheet for a certain period of time; and hot forming the heated steel and cooling at a temperature within a range of 200° C. or lower at a cooling speed of 20° C./s to 1000° C./s at the same time to manufacture an HPF part, [Expression 1] 190,000?[coiling temperature (CT)×Time (min)]/2?350,000, in the Relational Expression 1, Time refers to a time taken to reach 200° C. from coiling temperature.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: January 14, 2020
    Assignee: POSCO
    Inventors: Jin-Keun Oh, Yeol-Rae Cho, Seong-Woo Kim
  • Method for manufacturing a hot dip galvanized and galvannealed steel sheet having excellent elongation properties
    Patent number: 10526679
    Abstract: There is provided a hot-dip galvanized steel sheet and a hot-dip galvannealed steel sheet, which have excellent elongation properties, and methods for manufacturing the hot-dip galvanized steel sheet and the hot-dip galvannealed steel sheet. The present disclosure relates to a hot-dip galvanized steel sheet in which a hot-dip galvanized layer is formed on a surface of abase steel sheet, the hot-dip galvanized steel sheet having excellent elongation properties and being characterized by the composition and the microstructure thereof.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: January 7, 2020
    Assignee: POSCO
    Inventors: Sang Ho Han, Seong Ho Han
  • High-strength cold rolled steel sheet having excellent ductility, hot-dip galvanized steel sheet and method for manufacturing same
    Patent number: 10519526
    Abstract: The present invention relates to: a high-strength steel sheet used for construction materials and transportation means such as vehicles and trains and, more specifically, to a high-strength cold rolled steel sheet having excellent ductility, a hot-dip galvanized steel sheet, and a method for manufacturing the same.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: December 31, 2019
    Assignee: POSCO
    Inventors: Kyoo-Young Lee, Jai-Hyun Kwak, Joo-Hyun Ryu, Dong-Seoug Sin, Se-Don Choo
  • High-manganese steel with superior coating adhesion and method for manufacturing hot-dip galvanized steel from same
    Patent number: 10508326
    Abstract: There is provided a high-manganese steel with superior coating adhesion and a method of producing a hot-dip galvanized steel sheet from same. According to an aspect of the present disclosure, a high-manganese steel is characterized by including, by weight, C: 0.3-1%, Mn: 8-25%, Al: 1-8%, Si: 0.1-3.0%, Ti: 0.01-0.2%, Sn: 0.06-0.2%, B: 0.0005-0.01%, with the remainder being Fe and inevitable impurities. The present disclosure can provide a high-manganese and hot-dip galvanized steel sheet with superior surface quality as well as with high strength and workability by preventing coating failures that may be caused by manganese.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: December 17, 2019
    Assignee: POSCO
    Inventors: Kwang-Geun Chin, Sun-Ho Jeon
  • MAGNESIUM ALLOY SHEET AND MANUFACTURING METHOD THEREOF
    Publication number: 20190368010
    Abstract: An exemplary embodiment of the present invention relates to a magnesium alloy sheet and a manufacturing method thereof. According to an exemplary embodiment of the present invention, a magnesium alloy sheet including 1.0 to 10.5 wt % of Al, 0.1 to 2.0 wt % of Zn, 0.1 to 2.0 wt % of Ca, 0.03 to 1.0 wt % of Y, 0.002 to 0.02 wt % of Be, and a balance of Mg and inevitable impurities, with respect to a total of 100 wt % of the magnesium alloy sheet, may be provided.
    Type: Application
    Filed: December 12, 2017
    Publication date: December 5, 2019
    Applicants: POSCO, POSCO
    Inventors: Young-Wook Chae, Jun Ho Park, Jae Joong Kim, Oh-Duck Kwon
  • Field girth welding technology for high manganese steel slurry pipelines
    Patent number: 10493569
    Abstract: The present disclosure relates to a welding composition for joining high manganese steel base metals and methods of applying the same. The composition includes: carbon in a range of about 0.4 wt % to about 0.8 wt %; manganese in a range of about 18 wt % to about 24 wt %; chromium in an amount of ? about 6 wt %; molybdenum in an amount of ? about 4 wt %; nickel in an amount of ? about 5 wt %; silicon in an amount of about 0.4 wt % to about 1.0 wt %; sulfur in an amount of ? about 200 ppm; phosphorus in an amount of ? about 200 ppm; and a balance including iron. In an embodiment, the composition has an austenitic phase.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: December 3, 2019
    Assignees: ExxonMobil Research and Engineering Company, POSCO
    Inventors: Andrew J. Wasson, Timothy D. Anderson, Douglas P. Fairchild, Xin Yue, HyunWoo Jin, Ning Ma, IlWook Han, Sangchul Lee, Bongkeun Lee, Jongsub Lee
  • Austenitic-based stainless steel for molten carbonate fuel cell
    Patent number: 10494707
    Abstract: Provided is an austenitic stainless steel for a fuel cell including, in weight %, C: 0.05% to 0.09%, Si: 0.5% or less (0 excluded), Mn: 2.5% to 5.0%, Cr: 21% to 23%, Ni: 10% to 12%, Nb: 0.2% to 0.7%, N: 0.25% or less (0 excluded), Al: 0.2% or less (0 excluded), S: 0.003% or less (0 excluded), B: 0.01% or less (0 excluded), the remainder being Fe and unavoidable impurities.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: December 3, 2019
    Assignee: POSCO
    Inventors: Kwang Min Kim, Jong Hee Kim, Ki Hoon Jo, Bo Sung Seo
  • High manganese steel pipe with step-out weld zone erosion-corrosion resistance and method of making the same
    Patent number: 10493570
    Abstract: Improved steel welds, article for making the same, and methods of making the same are provided. The present disclosure provides advantageous erosion, corrosion and/or cracking resistant weld metal. More particularly, the present disclosure provides high manganese (Mn) weld metal compositions having enhanced erosion, corrosion and/or cracking resistance, articles for the production of the high manganese weld metal compositions having enhanced erosion, corrosion, and/or cracking resistance, and methods for fabricating high manganese weld metal compositions having enhanced erosion, corrosion and/or cracking resistance.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: December 3, 2019
    Assignees: ExxonMobil Research and Engineering Company, POSCO
    Inventors: HyunWoo Jin, Ning Ma, Adnan Ozekcin, Andrew J. Wasson, Douglas P. Fairchild, IlWook Han, Sangchul Lee, Bongkeun Lee, Jongsub Lee
  • Continuous casting and rolling apparatus and method
    Patent number: 10471502
    Abstract: A continuous casting and rolling apparatus according to one embodiment of the present invention provides: a continuous caster for generating a steel sheet; a first rolling unit associated with the continuous caster; and a second rolling unit which is spaced apart in the outlet of the first rolling unit and comprises: a rolling mill for pressing down the steel sheet; and a cutter for cutting a portion of the steel sheet, wherein the cutter is spaced from the second rolling unit by a length corresponding to the length of the steel sheet discharged in an at least discontinuous rolling mode, and may comprise a cut withdrawal unit provided between the first rolling unit and the second rolling unit.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: November 12, 2019
    Assignee: POSCO
    Inventors: Seong-Yeon Kim, Young-Ju Ko, Il-Sin Bae, Choong-Yun Lee, In-Jae Lee, Jea-Sook Chung, Sang-Hyeon Lee
  • Air knife
    Patent number: 10472711
    Abstract: An air knife includes: a nozzle main body provided so as to inject gas in response to the width of the steel plate; a nozzle lip installed on at least one of the upper section and the lower section of an outlet of the nozzle main body and extending inclinedly so that the injection cross-sectional area of the gas becomes narrow; and at least one moment generation unit, provided at one side of the nozzle lip, for generating a rotation moment so that the nozzle lip is curved in the width direction of the steel plate and a gap between other nozzle lips varies.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: November 12, 2019
    Assignee: POSCO
    Inventors: Chang-Woon Jee, Yong-Hun Kweon, Yeon-Chae Jeung
  • Method for increasing coke-oven gas
    Patent number: 10465123
    Abstract: Provided is a method of increasing an amount of coke-oven gas, including the step of: introducing steam into a gas way of a carbonization chamber of a coke oven such that a water-gas reaction is conducted at 500° C. or higher during a process of carbonizing coal in the carbonization chamber of the coke oven, wherein the starting point of steam into the gas way is moved up prior to a time point at which an amount of generation of coke-oven gas is maximized, so as to increase the steam introduction time, thereby maximizing a reaction of steam with carbon existing in the carbonization chamber of the coke oven.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: November 5, 2019
    Assignees: POSCO, Research Institute of Industrial Science and Techn
    Inventors: Joo Hyoung Park, Chang Houn Rhee
  • Fe—Ni alloy metal foil having excellent heat resilience and method for manufacturing same
    Patent number: 10458031
    Abstract: An aspect of the present invention provides an Fe—Ni alloy metal foil having excellent heat resilience, where the Fe—Ni alloy metal foil is prepared by an electroforming (EF) method and has a thickness of 100 ?m or less (except O ?m), wherein the Fe—Ni alloy metal foil comprises, by wt %, Ni: 34-46 %, a remainder of Fe and inevitable impurities, and wherein the Fe—Ni metal foil has a degree of heat resilience in an amount of 30 ppm or less.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: October 29, 2019
    Assignee: POSCO
    Inventors: Gwan-Ho Jung, Jin-You Kim, Moo-Jin Kim, Jae-Kon Lee, Jun-Hak Park, Jae-Hwa Hong
  • Chrome free coating composition having excellent blackening resistance and corrosion resistance, and surface-treated steel sheet
    Patent number: 10457834
    Abstract: The present invention provides a chromium-free coating composition having high blackening resistance and corrosion resistance, the composition comprising: 20 to 70 wt % of waterborne silane modified polyurethane; 0.5 to 5 wt % of a hardener; 0.5 to 5 wt % of a blackening inhibitor; 0.5 to 5 wt % of a corrosion inhibitor; and 0.5 to 5 wt % of a lubricant, with the balance being a solvent. The chromium-free coating composition has the effect of improving blackening resistance, corrosion resistance, alkali resistance, solvent resistance and fingerprint resistance of a steel sheet on which a coating layer comprising the composition is formed.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: October 29, 2019
    Assignees: POSCO, NOROO Coil Coatings Co., Ltd.
    Inventors: Young-Jin Kwak, Tae-Yeob Kim, Dong-Yun Kim, Yong-Jin Cho, Myoung-Hee Choi
  • GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR
    Publication number: 20190323105
    Abstract: A grain-oriented electrical steel sheet of an embodiment of the present invention comprises Si: 1.0% to 7.0% and Y: 0.005% to 0.5% by wt %, and the remainder comprising Fe and other inevitable impurities, and 10 pieces or less of inclusions comprising Y and having a diameter of 30 nm to 5 ?m per area of 1 mm2.
    Type: Application
    Filed: December 21, 2017
    Publication date: October 24, 2019
    Applicants: POSCO, POSCO
    Inventors: Chang Soo Park, Kyu-Seok Han, Hyung Don Joo, Jae Kyoum Kim, Woo-Sin Kim
  • HIGH STRENGTH STEEL SHEET HAVING EXCELLENT HIGH-TEMPERATURE ELONGATION CHARACTERISTIC, WARM-PRESSED MEMBER, AND MANUFACTURING METHODS FOR THE SAME
    Publication number: 20190316235
    Abstract: Provided is a high strength steel sheet having an excellent high-temperature elongation characteristic. The sheet includes, by weight %, 0.4-0.9% of C, 0.01-1.5% of Cr, 0.03% or less (exclusive of 0%) of P, 0.01% or less (exclusive of 0%) of S, 0.01% or less (exclusive of 0%) of N, 0.01% or less (exclusive of 0%) of sol. Al, and a balance of Fe and inevitable impurities, and comprises at least one among 2.1% or less (exclusive of 0%) of Mn and 1.6% or less (exclusive of 0%) of Si; the sheet has a microcrystalline structure including pearlite having an area fraction of 80% or more and ferrite having an area fraction of 20% or less; and the pearlite includes cementite having a major axis length of 200 nm or shorter.
    Type: Application
    Filed: December 12, 2017
    Publication date: October 17, 2019
    Applicant: POSCO
    Inventors: Je-Woong LEE, Sang-Ho HAN
  • Solid oxide fuel cell having longitudinal and lateral channels
    Patent number: 10446856
    Abstract: Provided is a solid oxide fuel cell having longitudinal and lateral channels in an electronic separator plate. A solid oxide fuel cell includes a unit cell formed by stacking a cathode, electrolyte, and an anode, a separator plate having channels in both surfaces thereof, wherein reaction gas flows through the channels, and the channels include longitudinal channels parallel to a flow direction of the reaction gas, and lateral channels crossing the flow direction of the reaction gas, and a collector disposed between the unit cell and the separator plate. The longitudinal channels increase in width from a reaction gas inflow hole to a reaction gas outflow hole.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: October 15, 2019
    Assignee: Posco Energy Co., Ltd.
    Inventors: Hyeon Min Son, Sang-Cheol Lee, Byung Geun Kuk, Sang Gyun Park, Sang Hyun Park
  • MOLTEN STEEL TREATMENT DEVICE AND MOLTEN STEEL TREATMENT METHOD USING SAME
    Publication number: 20190309380
    Abstract: Provided is a molten steel treatment device and a molten steel treatment method using same. The molten steel treatment method may include: preparing slag on molten steel; contacting a first electrode to at least a portion of the slag and a second electrode to at least a portion of the molten steel; and polarizing the slag by applying a voltage to the first electrode and the second electrode, to easily remove inclusions and impurity elements in the molten steel by controlling basicity and oxidation degree of the slag without using separate additives.
    Type: Application
    Filed: October 30, 2017
    Publication date: October 10, 2019
    Applicant: POSCO
    Inventor: Wook KIM
  • GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20190309387
    Abstract: The grain-oriented electrical steel sheet according to one embodiment of the present invention includes, by weight, Si: 1.0 to 7.0%, B: 0.001 to 0.1%, and Ba and Y individually or in a total amount of 0.005 to 0.5%, and the remainder includes Fe and other unavoidable impurities.
    Type: Application
    Filed: October 25, 2017
    Publication date: October 10, 2019
    Applicant: POSCO
    Inventors: Chang Soo Park, Kyu-Seok Han, Hyung Don Joo, Jin-Wook Seo, Woo-Sin Kim
  • Apparatus for Cutting Material and System for Cutting Material
    Publication number: 20190291154
    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: Application
    Filed: July 11, 2017
    Publication date: September 26, 2019
    Applicant: POSCO
    Inventors: Hyeong-Jun Huh, Choong-Soo Lim, Sung-Joon Kwak