Patents Assigned to Posco Co., Ltd.
  • ADHESIVE COATING COMPOSITION FOR ELECTRICAL STEEL SHEET, ELECTRICAL STEEL SHEET LAMINATE, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240043723
    Abstract: The present disclosure relates to a bonding composition for an electrical steel sheet, and a steel sheet and a laminate employing same, wherein the bonding composition for an electrical steel sheet may comprise an adhesive resin and a bonding additive, the adhesive resin may be polyurethane, and the bonding additive may comprise a coupling agent including an amino silane.
    Type: Application
    Filed: December 16, 2021
    Publication date: February 8, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Bongwoo HA, Jungwoo KIM, Donggyu LEE, Eunjung KO, Taeyoung NO, Gyeongryeol PARK
  • HIGH STRENGTH ZINC-PLATED STEEL SHEET HAVING EXCELLENT UNIFORM SPOT WELDABILITY ALONG WIDTH DIRECTION AND MANUFACTURING METHOD THEREOF
    Publication number: 20240043947
    Abstract: According to an aspect of the present invention, provided are a high strength zinc-plated steel sheet having excellent uniform spot weldability along the width direction, and a manufacturing method thereof.
    Type: Application
    Filed: December 7, 2021
    Publication date: February 8, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Ki-Cheol Kang, Dae-Young Kang, Tae-Chul Kim, Seul-Gi So, Myung-Soo Kim, Jong-Sang Kim
  • WIRE ROD FOR CONCRETE REINFORCING STEEL FIBER, STEEL FIBER, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20240043949
    Abstract: Provided is a wire rod for a concrete reinforcing steel fiber, a steel fiber, and a manufacturing method therefor. According to one disclosed embodiment of a wire rod for a concrete reinforcing steel fiber, the wire rod comprises, by weight, C: 0.01 to 0.04%, Si: 0.07 to 0.3%, Mn: 1.0 to 2.0%, P: 0.1 to 0.3% and the balance of Fe and other unavoidable impurities, wherein, when the radius of the wire rod is r, in a region from the center of a cross section perpendicular of the longitudinal direction to 0.95*r, the area fraction of ferrite is 90% or more, and the remainder comprises pearlite, wherein the average grain size of the ferrite may be 30 ?m or less and the colony size of the pearlite may be 10 ?m or less.
    Type: Application
    Filed: December 13, 2021
    Publication date: February 8, 2024
    Applicant: POSCO CO., LTD
    Inventors: Yo-sep YANG, Jaeseung LEE, Je-wook JANG, Manjae LEE
  • FERRITIC STAINLESS STEEL WITH IMPROVED RIDGING RESISTANCE AND ITS MANUFACTURING METHOD
    Publication number: 20240035134
    Abstract: A ferritic stainless steel with improved ridging resistance is disclosed herein. According to a disclosed embodiment, the ferritic stainless steel with improved ridging resistance comprises, in percent by weight (wt %), 0.001 to 0.3% of C, 0.01 to 1.0% of Si, 0.1 to 3.0% of Mn, 10 to 15% of Cr, 0.001 to 0.3% of N, 0.03% or less of P, 1.0% or less of Ni, 1.0% or less of Cu, 1.0% or less of Al, 0.003% or less of Mo, 1.0% or less of Ti, the remainder of Fe, and other unavoidable impurities, and satisfies y s represented by the following formula (1) is 6 or more.
    Type: Application
    Filed: August 26, 2021
    Publication date: February 1, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Junghyun Kong, Mun-soo Lee
  • GRAIN ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240035108
    Abstract: A method for manufacturing a grain oriented electrical steel sheet according to an embodiment of the present invention comprises the steps of: hot-rolling a slab to prepare a hot-rolled sheet, the slab containing, in weight %, Si: 2.5 to 4.0%, C: 0.03 to 0.09%, Al: 0.015 to 0.040%, Mn: 0.04 to 0.15%, S: 0.01% or less (0% excluded), N: 0.002 to 0.012%, and the balance being Fe and other inevitably incorporated impurities; cold-rolling the hot-rolled sheet to prepare a cold-rolled sheet; performing primary recrystallization annealing on the cold-rolled sheet; and performing secondary recrystallization annealing on the cold-rolled sheet that has been primary recrystallization annealed.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 1, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Kyungjun Ko, Sangwoo Lee
  • NON-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240038423
    Abstract: The present invention may provide a non-oriented electrical steel sheet containing, by wt %, 2.10 to 3.80% of Si, 0.001 to 0.600% of Mn, 0.001 to 0.600% of Al, 0.001 to 0.100% of P, 0.0005 to 0.0100% of C, 0.001 to 0.010% of S, 0.0001 to 0.010% of N, 0.0005 to 0.0050% of Ti, 0.001 to 0.080% of Sn, 0.001 to 0.080% of Sb, 0.0005 to 0.0030% of Se, 0.0003 to 0.0010% of Ge, and a balance of Fe and inevitable impurities, the non-oriented electrical steel sheet having excellent iron loss and magnetic flux density and low strength.
    Type: Application
    Filed: December 15, 2021
    Publication date: February 1, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Jaewan Hong, Junesoo Park, Yongsoo Kim, Suyong Shin
  • HIGHLY THICK STEEL MATERIAL HAVING EXCELLENT LOW-TEMPERATURE IMPACT TOUGHNESS AND MANUFACTURING METHOD THEREFOR
    Publication number: 20240035107
    Abstract: The present invention relates to a highly thick steel material and a manufacturing method therefor and, more specifically, to a highly thick steel material that exhibits excellent low-temperature impact toughness after long-term PWHT although the steel sheet is thick, and a manufacturing method therefor.
    Type: Application
    Filed: November 18, 2021
    Publication date: February 1, 2024
    Applicant: POSCO CO., LTD
    Inventor: Dae-Woo KIM
  • GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20240035128
    Abstract: A method for manufacturing a grain-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: manufacturing a hot rolled sheet by hot rolling a slab comprising, by wt %, 2.5-4.0% of Si, 0.03-0.09% of C, 0.015-0.040% of Al, 0.04-0.15% of Mn, 0.01% or less of S (excluding 0%) and 0.002-0.012% of N, and the balance of Fe and other inevitable impurities; cold rolling the hot rolled sheet to manufacture a cold rolled sheet; performing primary recrystallization annealing on the cold rolled sheet; and performing secondary recrystallization annealing on the cold rolled sheet for which the primary recrystallization annealing has been completed.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 1, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Minserk KWON, Seonghoon MIN, Heonjo CHOI
  • NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240038422
    Abstract: A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 3.3 to 4.0 weight % of Si; 0.4 to 1.5 weight % of Al; 0.2 to 1.0 weight % of Mn; 0.0015 to 0.0040 weight % of C; 0.0005 to 0.0020 weight % of N; 0.0005 to 0.0025 weight % of S; 0.005 to 0.01 weight % of Mo; 0.0005 to 0.0020 weight % of Ti; 0.0005 to 0.0020 weight % of Nb; and 0.0005 to 0.0020 weight % of V, with the remainder including Fe and other unavoidable impurities.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 1, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Hunju LEE, Yongsoo KIM, Suyong SHIN
  • AUSTENITIC HIGH MANGANESE STEEL FOR DISC BRAKE
    Publication number: 20240035132
    Abstract: Disclosed is: an austenitic high manganese steel for disc brake, which exhibits an excellent friction coefficient. In accordance with an embodiment of the present invention, the steel contains, in percent by weight (wt %), 0.2 to 1.8% of carbon (C), 8 to 30% of manganese (Mn), and the remainder of iron (Fe) and inevitable impurities, the microstructure comprises 90% or more of austenite by area fraction, and the length of austenitic grain boundaries may be 1 ?m or more per unit area of 100 ?m2.
    Type: Application
    Filed: December 21, 2021
    Publication date: February 1, 2024
    Applicant: POSCO CO., LTD
    Inventors: Dongho LEE, Soongi LEE
  • HIGH STRENGTH THIN STEEL MATERIAL FOR API HAVING EXCELLENT RESISTANCE TO DEFORMATION AND METHOD OF MANUFACTURING SAME
    Publication number: 20240035106
    Abstract: An embodiment of the present invention provides a high strength thin steel material for API having excellent resistance to deformation and a method of manufacturing same, the steel material comprising, in weight %, C: 0.05-0.15%, Si: 0.05% or less (0% excluded), Mn: 0.5-2.5%, Nb: 0.05% or less (0% excluded), V: 0.004% or less (0% excluded), Mo: 0.03-0.2%, Cr: 0.1-0.3%, P: 0.03% or less (0% excluded), S: 0.015% (0% excluded), Al: 0.05% or less (0% excluded), N: 0.01% or less (0% excluded), and the balance being Fe and other inevitable impurities, wherein the microstructure of the steel material comprises, in area %, ferrite: 10-30% and the balance being bainite, the ferrite having an average crystal grain size of 15-30 ?m and including at least 3,000/?m2 V-based precipitates.
    Type: Application
    Filed: November 22, 2021
    Publication date: February 1, 2024
    Applicant: POSCO CO., LTD.
    Inventor: Jin-You KIM
  • FERRITIC STAINLESS STEEL WITH IMPROVED GRAIN BOUNDARY EROSION, AND MANUFACTURING METHOD THEREOF
    Publication number: 20240026507
    Abstract: Disclosed is a ferritic stainless steel with reduced grain boundary erosion. A ferritic stainless steel with reduced grain boundary erosion according to an embodiment includes, in percent by weight (wt %), 0.005 to 0.1% of C, 0.01 to 1.0% of Si, 0.01 to 1.5% of Mn, 13 to 18% of Cr, 0.005 to 0.1% of N, 0.005 to 0.2% of Al, 0.005 to 0.1% of Ni, 0.003% or less of Mo, 0.05% or less of P, 0.005% or less of S, and the remainder being Fe and impurities, and satisfies an Acl, defined by Formula (1) below, of 900 or more and 990 or less: Ac1=36Cr+90Si+76Mo+760Al+350?(800C+1300N+150Ni+50Mn)??Formula (1): (wherein C, N, Si, Mn, Cr, Ni, Al, Mn, and Mo represent a content (wt %) of each element).
    Type: Application
    Filed: October 29, 2021
    Publication date: January 25, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Soo-ho Park, Dong-hoon Kim, Jae-seok Park, Youngjun Kim
  • ELECTROMAGNETIC INSPECTION DEVICE CAPABLE OF CALIBRATION
    Publication number: 20240027399
    Abstract: The present invention provides a correction steel sheet for quickly and accurately correcting the sensitivity of a sensor during hardness measurement in which a sudden signal change does not occur. In one embodiment, the correction steel sheet is a steel sheet having a long side and a short side and is used for correcting a sensor and includes a first part having a first hardness and a second part having a second hardness greater than the first hardness. The first part and the second part are arranged at different positions in a short side direction, and have phases changed from austenite grains of the same composition.
    Type: Application
    Filed: December 10, 2021
    Publication date: January 25, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Ju-Seung Lee, Seong-Ung Koh, Hyoung-Kuk Park
  • CARBON FILAMENT WIRE FOR LASER WELDING OF STEEL SHEET HAVING ALUMINIUM-BASED COATING LAYER, LASER WELDING METHOD OF STEEL SHEET HAVING ALUMINIUM-BASED COATING LAYER USING SAME, AND WELDED PRODUCT PRODUCED BY SAME
    Publication number: 20240024979
    Abstract: One embodiment of the present invention provides a carbon filament wire for laser welding of a steel sheet having an aluminum-based coating layer, a laser welding method of a steel sheet having an aluminum-based coating layer by using same, and a welded product produced by same, the carbon filament wire comprising: a resin matrix; and two or more carbon filaments provided inside the resin matrix.
    Type: Application
    Filed: June 28, 2022
    Publication date: January 25, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Mok-Young Lee, Du-Youl Choi, Sang-Ho Uhm, Do-Kyeong Han
  • HOT PRESS-FORMED MEMBER HAVING EXCELLENT CRACK PROPAGATION RESISTANCE AND DUCTILITY, AND METHOD FOR PRODUCING SAME
    Publication number: 20240026479
    Abstract: Provided is a hot press-formed member having excellent crack propagation resistance and ductility. The hot press-formed member includes: a base steel sheet and a zinc or zinc alloy plating layer on at least one surface of the base steel sheet. The base steel sheet contains, by wt %, carbon (C): 0.08-0.30%, silicon (Si): 0.01-2.0%, manganese (Mn): 3.1-8.0%, aluminum (Al): 0.001-0.5%, phosphorus (P): 0.001-0.05%, sulfur (S): 0.0001-0.02%, nitrogen (N): 0.02% or less, and a balance of iron (Fe) and other impurities. The hot press-formed member comprises 1-30 area % of retained austenite as a microstructure, and a Mn(wt %)/Zn(wt %) content ratio in an oxide layer of 0.5-1.2 ?m in a thickness direction from a surface layer of the plating layer is 0.1 or more.
    Type: Application
    Filed: October 2, 2023
    Publication date: January 25, 2024
    Applicant: POSCO CO., LTD
    Inventors: Jin-Keun OH, Seong-Woo KIM, Yeol-Rae CHO, Won-Mo BAK
  • GALVANIZED STEEL SHEET WITH EXCELLENT SURFACE QUALITY AND ELECTRICAL RESISTANCE SPOT WELDABILITY AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240026488
    Abstract: The present invention relates to a high-strength hot-dipped galvanized steel sheet having excellent surface quality and spot weldability and a method for manufacturing same. The hot-dipped galvanized steel sheet according to one aspect of the present invention comprises a base steel sheet and a hot-dipped galvanized layer formed on the surface of the base steel sheet, in which an inhibiting layer made of an Fe—Al alloy can be formed at an area ratio of 60% or more between the base steel sheet and the hot-dipped galvanized layer.
    Type: Application
    Filed: December 21, 2021
    Publication date: January 25, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Ki-Cheol Kang, Yong-Joo Kim, Tae-Chul Kim, Myung-Soo Kim, Jong-Sang Kim
  • STEEL SHEET FOR PORCELAIN ENAMEL, AND METHOD OF MANUFACTURING SAME
    Publication number: 20240026486
    Abstract: A steel sheet for porcelain enamel according to an embodiment of the present invention comprises 0.0005 to 0.0030 wt % of C, 0.15 to 0.55 wt % of Mn, to 0.03 wt % of S, 0.0001 to 0.002 wt % of Al, 0.001 to 0.020 wt % of P, 0.001 to 0.030 wt % of S, 0.02 to 0.06 wt % of Cu, 0.005 to 0.012 wt % of N, 0.05 to 0.20 wt % of Cr, and 0.03 to 0.06 wt % of O, with the balance being Fe and inevitable impurities. A cold-rolled steel sheet for porcelain enamel according to an embodiment of the present invention comprises an oxide layer that extends inward from the surface, wherein the thickness of the oxide layer is 0.006-0.030 ?m.
    Type: Application
    Filed: December 15, 2021
    Publication date: January 25, 2024
    Applicant: POSCO Co., Ltd
    Inventor: Jaiik Kim
  • NON-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240026489
    Abstract: A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes, by wt %: 2.5 to 3.8% of Si, 0.1 to 1.5% of Al, 0.1 to 2.0% of Mn, 0.01 to 0.15% of Cr, and a balance of Fe and inevitable impurities, wherein the non-oriented electrical steel sheet satisfies the following Expression 1. [Cr]>([Al]+[Mn])/[Si]/10??[Expression 1] (In Expression 1, [Cr], [Al], [Mn], and [Si] represent contents (wt %) of Cr, Al, Mn, and Si, respectively.
    Type: Application
    Filed: December 16, 2021
    Publication date: January 25, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Jaehoon Kim, Suyong Shin, Jooyoung Koo, Seungil Kim
  • STAINLESS STEEL FOR FUEL CELL SEPARATOR HAVING EXCELLENT THROUGH-PLANE ELECTRICAL CONDUCTIVITY AND CORROSION RESISTANCE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20240030465
    Abstract: This specification discloses a stainless steel for a fuel cell separator with excellent through-plane electrical conductivity and corrosion resistance. Disclosed a stainless steel for a fuel cell separator with excellent through-plane electrical conductivity and corrosion resistance, when the surface of stainless steel containing 15% or more of Cr by weight is measured by X-ray angle-resolved photoelectron spectroscopy using an Al-K? X-ray source under the condition that the photoelectron take-off angle is 12°, following surface oxide element ratio (1) value may be 0.5 to 5, and following surface oxide element ratio (2) value may be 0.
    Type: Application
    Filed: August 12, 2021
    Publication date: January 25, 2024
    Applicant: POSCO Co., Ltd
    Inventors: Jonghee Kim, Jinsuk Kim, Bosung Seo, Kwangmin Kim
  • EXTREMELY THICK STEEL PLATE FOR STEAM DRUM HAVING EXCELLENT SURFACE QUALITY AND LAMELLAR TEAR RESISTANCE, AND MANUFACTURING METHOD FOR SAME
    Publication number: 20240026478
    Abstract: According to an aspect of the present invention, an extremely thick steel plate for steam drum having excellent surface quality and lamellar tear resistance and a manufacturing method therefor may be provided.
    Type: Application
    Filed: November 24, 2021
    Publication date: January 25, 2024
    Applicant: POSCO CO., LTD
    Inventor: Dae-Woo KIM