Patents Assigned to Posco Co., Ltd.
  • GAS-SHIELDED ARC WELDING WIRE AND WELDING MEMBER HAVING EXCELLENT FATIGUE RESISTANCE CHARACTERISTICS AND RESISTANCE TO DEFORMATION DUE TO RESIDUAL STRESS IN WELD ZONE, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20230390873
    Abstract: An aspect of the present disclosure is to provide a gas shielded arc welding wire capable of imparting excellent fatigue resistance characteristics and resistance to deformation due to residual stress to a weld zone. Another aspect of the present disclosure is to provide a welding member having excellent fatigue resistance characteristics and resistance to deformation due to residual stress of a weld zone, and a method for manufacturing the same.
    Type: Application
    Filed: December 20, 2021
    Publication date: December 7, 2023
    Applicant: POSCO Co., Ltd
    Inventor: Gyu-Yeol Bae
  • Hot rolled coated steel sheet having high strength, high formability, excellent bake hardenability and method of manufacturing same
    Patent number: 11834727
    Abstract: The hot-rolled coated steel sheet comprising: in wt %, C: 0.05-0.14%, Si: 0.1-1.0%, Mn: 1.0-2.0%, P: 0.001-0.05%, S: 0.001-0.01%, AI: 0.01-0.1%, Cr: 0.005-1.0%, Ti: 0.005-0.13%, Nb: 0.005-0.03%, N: 0.001-0.01%, Fe residues, and other inevitable impurities; a mixed structure of ferrite and bainite as a main phase; and as a remaining structure, one or more selected from the group consisting of martensite, austenite, and phase martensite (MA), wherein a fraction of the ferrite and bainite is 95-99 area % and Equation 1 is satisfied. [Equation 1] FCO{110}<112>+FCO{112}<111>?10 where, FCO{110}<112> and FCO{112}<111>, each representing an area fraction occupied by a structure having ac crystal orientation of {110}<112> and {112}<111>.
    Type: Grant
    Filed: January 31, 2023
    Date of Patent: December 5, 2023
    Assignee: POSCO CO., LTD
    Inventors: Hyun-Taek Na, Sung-Il Kim
  • Plated steel wire and manufacturing method for the same
    Patent number: 11834747
    Abstract: A plated steel wire, according to one aspect of the present invention, comprises: a base steel wire; and a zinc alloy plated layer. The zinc alloy plated layer comprises, in percentage by weight: 1.0% to 3.0% of Al; 1.0% to 2.0% of Mg; 0.5% to 5.0% of Fe; and the balance being Zn and unavoidable impurities, and includes a Zn/MgZn2/Al ternary eutectic structure, a Zn single-phase structure, and an Fe—Zn—Al-based crystal structure, wherein the Fe—Zn—Al-based crystal structure is formed adjacent to the base steel wire, and can have an average thickness of ? to ½ with respect to an average thickness of the zinc alloy plated layer.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: December 5, 2023
    Assignees: POSCO CO., LTD, KISWIRE LTD., HONGDUK INDUSTRIAL CO., LTD.
    Inventors: Tae-Chul Kim, Jong-Sung Kim, Sung-Hoon Kang, Gwang-Weon Yu, Il-Ryoung Sohn, Jong-Sang Kim
  • PLATED STEEL SHEETS FOR HOT PRESS FORMING HAVING EXCELLENT HYDROGEN BRITTLENESS RESISTANCE AND IMPACT RESISTANCE, HOT PRESS FORMED PARTS, AND MANUFACTURING METHODS THEREOF
    Publication number: 20230383373
    Abstract: Provided are plated steel sheets for hot press forming, hot press formed parts, and manufacturing methods thereof, the plated steel sheets comprising: a base steel sheet comprising, in weight %, C: 0.07 to 0.5%, Si: 0.05 to 1%, Mn: 0.5 to 5%, P: 0.001 to 0.015%, S: 0.0001 to 0.02%, Al: 0.01 to 0.1%, Cr: 0.01 to 1%, N: 0.001 to 0.02%, Ti: 0.1% or less, B: 0.01% or less, Sn: 0.01 to 0.1%, and a balance of Fe and inevitable impurities; an aluminum or aluminum alloy plating layer disposed on at least one surface of the base steel sheet; and an Sn-enriched layer provided between the base steel sheet and the plating layer, wherein the Sn-enriched layer satisfies a specific relationship.
    Type: Application
    Filed: December 3, 2021
    Publication date: November 30, 2023
    Applicant: POSCO Co., Ltd
    Inventors: Jin-Keun Oh, Seong-Woo Kim, Sang-Heon Kim, Hyo-Sik Chun
  • Method of manufacturing high-strength steel sheet having excellent processability
    Patent number: 11827950
    Abstract: Provided is a method of manufacturing a high strength steel sheet having excellent workability, including: reheating a steel slab; hot-rolling the reheated steel slab at an Ar3 transformation point or higher; coiling in a temperature range of 400 to 700° C.; primary cooling at a cooling rate of 0.1° C./s or less to room temperature; producing a cold rolled steel sheet at a cold reduction ratio of 40 to 70%; continuously annealing the cold rolled steel sheet in a temperature range of Ac1+30° C. to Ac3?20° C.; secondary cooling at a cooling rate of 10° C./s or less to 630 to 670° C.; third cooling to 400 to 500° C. at a cooling rate of 5° C./s or more in a hydrogen; maintaining for 70 seconds or more; hot-dip galvanizing; and performing a final cooling to Ms or less at a cooling rate of 1° C./s or more.
    Type: Grant
    Filed: November 22, 2022
    Date of Patent: November 28, 2023
    Assignee: POSCO CO., LTD
    Inventors: Yeon-Sang Ahn, Chang-Hyo Seo, Kang-Hyun Choi, Eul-Yong Choi
  • Hot press-formed member having excellent crack propagation resistance and ductility, and method for producing same
    Patent number: 11827947
    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: Grant
    Filed: July 7, 2017
    Date of Patent: November 28, 2023
    Assignee: POSCO CO., LTD
    Inventors: Jin-Keun Oh, Seong-Woo Kim, Yeol-Rae Cho, Won-Mo Bak
  • SIDE FRAME FOR BATTERY CASE
    Publication number: 20230378583
    Abstract: The present invention relates to a side frame for a battery case, which can achieve lightweight and cost reduction simultaneously while sufficiently protecting battery cells against the external shock, and the side frame for a battery case according to an embodiment comprises: a first frame unit formed to have an open end surface; and a second frame unit which is arranged in the first frame unit to close the open end surface of the first frame unit and is coupled to the first frame unit, wherein the first frame unit and the second frame unit may be formed of different materials from each other.
    Type: Application
    Filed: June 24, 2021
    Publication date: November 23, 2023
    Applicant: POSCO Co., Ltd
    Inventors: Chang-Gyun Jung, Sang-Kwon Wee, Kyu-Seung Jee
  • Steel sheet for hot press formed member having excellent coating adhesion and manufacturing method for the same
    Patent number: 11820103
    Abstract: The present invention relates to 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 according to one aspect of the present invention 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: November 2, 2021
    Date of Patent: November 21, 2023
    Assignee: POSCO CO., LTD
    Inventors: Seong-Woo Kim, Jin-Keun Oh, A-Ra Cho, Hyeon-Jeong Shin
  • Coacervate formed from catechol-substituted anionic polymer, adhesive comprising same, and method for producing same
    Patent number: 11814556
    Abstract: A coacervate including a catechol-substituted anionic polymer; an adhesive including same; and a method for producing the coacervate are described. More specifically, a coacervate formed by mixing a catechol derivative of a mussel adhesive protein and a catechol-substituted anionic polymer; an adhesive including the coacervate; and a method for producing a coacervate are described. The method includes a step of obtaining a catechol-substituted anionic polymer through catechol substitution of an anionic polymer, and a step of mixing the catechol-substituted anionic polymer and a catechol derivative of a mussel adhesive protein.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: November 14, 2023
    Assignees: POSCO CO., LTD, POSTECH ACADEMY-INDUSTRY FOUNDATION, NATURE GLUETECH CO., LTD.
    Inventors: Hyung Joon Cha, Hyo Jeong Kim, Bong-Hyuk Choi
  • Welded member for plated steel plate excellent in weld zone porosity resistance and fatigue properties and method for manufacturing the same
    Patent number: 11815127
    Abstract: Disclosed is a welded member for plated steel plate having excellent weld zone porosity resistance and fatigue properties and a method of manufacturing the same. The welded member for plated steel plate having excellent weld zone porosity resistance and fatigue properties according to an embodiment of the present invention comprises a weld metal portion formed by arc welding and overlapping a first member and a laminated second member so as to partially overlap the first member, wherein the toe angle (?) of the weld metal portion is 45° or less, and the first member and the second member are plated steel plates.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: November 14, 2023
    Assignee: POSCO CO., LTD
    Inventors: Gyu-Yeol Bae, Tae-Young Lee
  • STEEL SHEET HAVING EXCELLENT HYDROGEN INDUCED CRACKING RESISTANCE AND LONGITUDINAL STRENGTH UNIFORMITY, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20230357907
    Abstract: The present invention relates to a steel sheet used for a line pipe or the like, and particularly, to a steel sheet having excellent hydrogen induced cracking resistance, and longitudinal strength uniformity, and a method for manufacturing the same.
    Type: Application
    Filed: July 13, 2023
    Publication date: November 9, 2023
    Applicant: POSCO CO., LTD
    Inventors: Seong-Ung Koh, Hyo-Shin Kim, Yoen-Jung Park
  • STEEL MATERIAL HAVING EXCELLENT HYDROGEN EMBRITTLEMENT RESISTANCE AND IMPACT TOUGHNESS AND METHOD FOR MANUFACTURING
    Publication number: 20230357878
    Abstract: The objective of the present invention is to provide a steel material having improved hydrogen embrittlement resistance and high impact toughness despite a low-cost alloy system compared to conventional steel, which can be advantageously applicable in the field using hydrogen which is gradually increasing, and a method for manufacturing same.
    Type: Application
    Filed: July 20, 2021
    Publication date: November 9, 2023
    Applicant: POSCO Co., Ltd
    Inventor: Hyun-Je Sung
  • Electrical steel sheet adhesive coating composition, electrical steel sheet product, and manufacturing method therefor
    Patent number: 11807922
    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: Grant
    Filed: December 21, 2017
    Date of Patent: November 7, 2023
    Assignee: POSCO CO., LTD
    Inventors: Jung-Woo Kim, Bongwoo Ha, Taeyoung No, Won-Seog Bong
  • SURFACE TREATMENT COMPOSITION FOR TERNARY HOT-DIP GALVANNEALED STEEL SHEET, SURFACE-TREATED TERNARY HOT-DIP GALVANNEALED STEEL SHEET USING SAME, AND PREPARATION METHOD THEREOF
    Publication number: 20230348732
    Abstract: The present disclosure is to provide a surface treatment composition that may impart excellent corrosion resistance, blackening resistance, and alkali resistance, and an intrinsic surface color property to a ternary hot-dip galvannealed steel sheet. The present disclosure provides a surface treatment composition containing: based on 100 wt% of a solid content of the composition, 70 to 90 wt% of a resin mixture including a high molecular weight polysilicon-modified polyurethane main resin, a low molecular weight polysilicon-modified polyurethane auxiliary resin, and an acrylic urethane auxiliary resin; 5 to 25 wt% of a melamine-based curing agent; 0.5 to 10 wt% of an inorganic additive; 0.5 to 10 wt% of a silane coupling agent; 0.1 to 2 wt% of an adhesion promoter; 0.1 to 2 wt% of a coloring pigment; and 0.1 to 1 wt% of a pigment stabilizer.
    Type: Application
    Filed: September 2, 2021
    Publication date: November 2, 2023
    Applicant: POSCO Co., Ltd
    Inventors: Soo-Hyoun Cho, Won-Ho Son
  • COMPOSITION RESIN COMPOSITION HAVING EXCELLENT WEATHER RESISTANCE AND HEAT-RADIATION CHARACTERISTICS, COMPOSITE-RESIN-COATED STEEL SHEET AND METHOD FOR MANUFACTURING SAME
    Publication number: 20230348712
    Abstract: The present invention relates to, in the provision of a material that has excellent weather resistance and heat-radiation characteristics, and thus, is suitable for solar cells, a composite resin composition having excellent weather resistance and heat-radiation characteristics, a composite-resin-coated steel sheet obtained therefrom, and a method for manufacturing the same.
    Type: Application
    Filed: September 24, 2021
    Publication date: November 2, 2023
    Applicant: POSCO Co., Ltd
    Inventors: Du-Hwan Jo, Young-Jun Park, Hee-Jea Eun
  • CONSTRAINED-TYPE VIBRATION-DAMPING METAL SHEEET HAVING FOAM PORES AND METHOD FOR MANUFACTURING SAME
    Publication number: 20230347623
    Abstract: Provided are a constrained-type vibration-damping metal sheet having foam pores and a method for manufacturing same. The constrained-type vibration-damping metal sheet of the present invention comprises: a lower metal sheet; a foam resin film bonded to the lower metal sheet; and an upper metal sheet bonded to the foam resin film, wherein the foam resin film has foam pores comprising, by wt % of itself, 85-95% of a thermoplastic polyethylene resin having a number average molecular weight of 8000-12000, 0.1-1% of stearic acid, 1-5% of a styrene-ethylene-butadiene-styrene (SEBS) resin, 0.5-5% of a foaming agent, 1-4% of a dicumyl peroxide crosslinking agent, and 0.5-2% of ZnO foaming aid.
    Type: Application
    Filed: September 13, 2021
    Publication date: November 2, 2023
    Applicant: POSCO Co., Ltd
    Inventors: Jin-Tae Kim, Yang-Ho Choi, Ha-Na Choi, Dae-Gyu Kang
  • Hot-dip galvanized steel sheet having excellent surface appearance and low-temperature bonding brittleness
    Patent number: 11801665
    Abstract: Provided is a hot-dip galvanized steel sheet to be used for home appliances, vehicles, and the like, and having excellent surface appearance and low-temperature bonding brittleness. The hot-dip galvanized steel sheet includes: a base steel sheet; and a hot-dip galvanized layer formed on the base steel sheet. A surface of the base steel sheet has a centerline average roughness (Ra) of 0.3 or more, a roughness skewness (Rsk) of ?1 or less, and a roughness kurtosis (Rku) of 6 or more.
    Type: Grant
    Filed: November 28, 2019
    Date of Patent: October 31, 2023
    Assignee: POSCO CO., LTD
    Inventor: Hyeon-Seok Hwang
  • Double oriented electrical steel sheet and method for manufacturing same
    Patent number: 11802319
    Abstract: A double oriented electrical steel sheet includes: 2.0 to 6.0% of Si, 0.0005 to 0.04% of Al, 0.0001 to 0.003% of S, 0.02 to 1.0% of Mn, equal to or less than 0.003% of N, excluding 0%, equal to or less than 0.01% of C, excluding 0%, equal to or less than 0.01% of Ti excluding 0%, 0.005 to 0.10% of P as wt %, and a remainder including Fe and inevitable impurities. Such a double oriented electrical steel sheet satisfies Formula 1: [Mn]/[S]?60,??[Formula 1] where, [Mn] and [S] are contents (wt %) of Mn and S, respectively.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: October 31, 2023
    Assignee: POSCO CO., LTD
    Inventors: Seil Lee, Sang-Woo Lee, Su-Yong Shin
  • Steel sheet for hot press formed member having excellent resistance to hydrogen delayed fracture and method for manufacturing thereof
    Patent number: 11801664
    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: Grant
    Filed: April 25, 2022
    Date of Patent: October 31, 2023
    Assignee: POSCO CO., LTD.
    Inventors: Seong-Woo Kim, Jin-Keun Oh, Yeol-Rae Cho
  • SIDE SILL FOR VEHICLE
    Publication number: 20230339543
    Abstract: The present disclosure relates to a side sill for a vehicle, wherein the side sill is capable of absorbing an impact during lateral collision of the vehicle to maximally suppress the degree to which the side sill enters the interior, and protecting vehicle occupants and batteries. The side sill for a vehicle comprises: a side sill inner panel; a side sill outer panel coupled to the side sill inner panel; and a first cushioning member disposed between the side sill inner panel and the side sill outer panel and constituting a plurality of closed cross-sections arranged in the width direction of the side sill. The first cushioning member includes a main body formed by bending a single plate, and at least one partition member connecting both surfaces of the main body. A plurality of beads may be formed on the main body and the partition member.
    Type: Application
    Filed: October 8, 2021
    Publication date: October 26, 2023
    Applicant: POSCO Co., Ltd
    Inventors: Gyu-Min Lee, Gi-Suk Chung, Kyung-Hwan Chung