Patents Assigned to Posco
  • Patent number: 10385218
    Abstract: Provided are an insulation coating composition for an oriented electrical steel sheet, an oriented electrical steel sheet having an insulation coating formed on the surface thereof by using the same, and a manufacturing method thereof, and specifically, it is possible to provide an insulation coating composition for an oriented electrical steel sheet, including 0.1 to 7 wt % of hollow nanoparticles, 0.1 to 5 wt % of ceramic nanofibers, 0.1 to 5 wt % of mesoporous nanoparticles, 30 to 60 wt % of colloidal silica nanoparticles, and 30 to 60 wt % of phosphate, and to provide an oriented electrical steel sheet including an insulation coating produced by the composition on the surface of the oriented electrical steel sheet, including 0.005 to 0.05 wt % of any one element selected from boron (B), vanadium (V), or a combination thereof, 2.6 to 4.3 wt % of silicon (Si), 0.020 to 0.040 wt % of aluminum (Al), 0.01 to 0.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: August 20, 2019
    Assignee: POSCO
    Inventors: Min Serk Kwon, Ho-Kyung Shim, Heon-Jo Choi, Byoung-Sub Choi
  • Patent number: 10377696
    Abstract: An apparatus for separating dimethyl carbonate using pervaporation includes: an atmospheric distillation column and a high pressure distillation column distilling a mixture containing dimethyl carbonate and methanol and separating dimethyl carbonate from the mixture; and a pervaporation membrane module disposed between the atmospheric distillation column and the high pressure distillation column and allowing for permeation of the methanol to separate the methanol from the mixture, thereby reducing heat consumption and a process cost as compared to the case of only using an existing pressure swing distillation method.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: August 13, 2019
    Assignees: POSCO, NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Joon-Hyun Baik, Jaap Ferdinand Vente, Anatolie Motelica
  • Patent number: 10370736
    Abstract: Provided is a ultrahigh strength steel for a welded structure having superior toughness in a weld heat-affected zone (HAZ) comprising: by wt %, carbon (C): 0.05% to 0.15%, silicon (Si): 0.1% to 0.6%, manganese (Mn): 1.5% to 3.0%, nickel (Ni): 0.1% to 0.5%, molybdenum (Mo): 0.1% to 0.5%, chromium (Cr): 0.1% to 1.0%, copper (Cu): 0.1% to 0.4%, titanium (Ti): 0.005% to 0.1%, niobium (Nb): 0.01% to 0.03%, boron (B): 0.0003% to 0.004%, aluminum (Al): 0.005% to 0.1%, nitrogen (N): 0.001% to 0.006%, phosphorus (P): 0.015% or less, sulfur (S): 0.015% or less, iron (Fe) as a residual component thereof, and inevitable impurities.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: August 6, 2019
    Assignee: POSCO
    Inventors: Hong-Chul Jeong, Ho-Soo Kim
  • Patent number: 10358691
    Abstract: The present invention relates to an apparatus for continuous annealing of a strip, capable of manufacturing a high-strength and highly ductile cold-rolled steel sheet having both excellent strength and ductility, and to a method for continuous annealing of a strip. The continuous annealing apparatus, according to the present invention, is capable of continuous annealing by cooling after heating, and then reheating, unlike an existing continuous annealing apparatus which heats only once and then cools or provides an overaging treatment. As a result, the continuous annealing apparatus, according to the present invention, can preliminarily render a homogeneous texture or control the texture as desired, and then perform another reheating heat treatment to stabilize the texture or control the shape thereof to a desired state.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: July 23, 2019
    Assignee: POSCO
    Inventors: Jai-Hyun Kwak, Kyoo-Young Lee, Hang-Sik Cho, Joo-Hyun Ryu, Man-Young Park
  • Patent number: 10350868
    Abstract: Disclosed herein is a bonded-type laminated core member manufacturing apparatus comprising an adhesive application unit to apply an adhesive to a material being continuously transferred, and a laminating unit to integrate laminar members laminated within a laminating hole by blanking the material, a laminated core member being manufactured by interlayer adhesion between the laminar members, wherein the laminating unit includes a high-frequency heater to harden the adhesive located between the laminar members, the high-frequency heater including a coil wound on the circumference of a hardening hole which accommodates the laminar members and forming a passage of high-frequency current. In accordance with the present invention, the adhesive is rapidly hardened by high-frequency induction heating and thus the integration time of the laminated core member is shortened, and accuracy of the laminating unit, which integrates the laminar members, i.e.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: July 16, 2019
    Assignee: POSCO TMC CO., LTD.
    Inventors: Il Gwen Chung, Suk Jo Kang, Chang Don Park, Ki Hwan You
  • Patent number: 10351924
    Abstract: A hot-dip galvanized steel sheet includes a base steel sheet and a hot-dip galvanized layer formed on the base steel sheet, the base steel sheet including, by wt %, C:0.02% to 0.08%, Mn:1.3% to 2.1%, Si:0.3% or less (excluding 0%), Cr:1.0% or less (excluding 0%), P:0.1% or less (excluding 0%), S: 0.01% or less (excluding 0%), N:0.01% or less (excluding 0%), sol.Al: 0.02% to 0.06%, Mo:0.2% or less (excluding 0%), B:0.003% or less (excluding 0%), and a balance of Fe and inevitable impurities, wherein the base steel sheet has a microstructure comprising 90% or more by area of ferrite, 3% or less by area of bainite as described in Formula 1, and martensite as a remainder.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: July 16, 2019
    Assignee: POSCO
    Inventors: Sang-Ho Han, Seong-Ho Han
  • Patent number: 10351927
    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 hot-rolled steel sheet comprising, by weight %: C: 0.05 to 0.15%, Si: 0.03 to 0.10%, Mn: 0.7 to 1.39%, P: 0.001 to 0.05%, S: 0.001 to 0.03%, Al: 0.002 to 0.035%, and the remainder being Fe and unavoidable impurities. The weight ratio of Mn/Si is 15 to 25, 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(PO)4 formed within 50 ?m from the surface.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: July 16, 2019
    Assignee: POSCO
    Inventors: Hyo Jung Kwak, Young-Ha Kim, Seok Jong Seo
  • Patent number: 10344361
    Abstract: The present invention relates to an ultra-high strength, hot-dip galvanized steel sheet having excellent surface quality and coating adherence and to a method for manufacturing thereof, the ultra-high strength, hot-dip galvanized steel sheet comprising: 0.1-0.3% by weight carbon (C); 0.1-2.0% by weight silicon (Si); 0.005-1.5% by weight aluminum (Al); 1.5-3.5% by weight manganese (Mn); 0.04% by weight or less phosphorus (P) (excluding 0% by weight); 0.015% by weight or less sulphur (S) (excluding 0% by weight); 0.02% by weight or less nitrogen (N) (excluding 0% by weight); the balance being Fe; and other inevitable impurities, and further comprising 0.01 wt.% to 0.07 wt.% of at least one kind of element selected from the group consisting of bismuth (Bi), tin (Sn) and antimony (Sb).
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: July 9, 2019
    Assignee: POSCO
    Inventors: Myung-Soo Kim, Ki-Cheol Kang
  • Patent number: 10328520
    Abstract: A side trimming apparatus including a cutting unit which is installed on at least one side of a steel plate being transferred and trims a side of the steel plate by mechanical cutting and a laser processing unit which is installed in front of the cutting unit and emits a laser beam to a portion of the steel plate to be cut to form a groove at the portion to be cut or preheat the portion to be cut, and a side trimming method using the same are provided.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: June 25, 2019
    Assignee: POSCO
    Inventors: Choong Soo Lim, Hyeong Jun Huh, Sung Joon Kwak, Sang Ho Park
  • Patent number: 10315699
    Abstract: An embodiment of the present invention provides an improved upper arm and shock absorber mounting bracket and a vehicle frame including same, which can reduce the number of components, make assembly convenient, and reduce the number of assembly steps. An upper arm and shock absorber mounting bracket according to an aspect of the present invention comprises: a central supporting portion forming a flat surface portion, on which a shock absorber is supported, by pressing and forming a tube member; side supporting portions formed by being bent downwardly from both sides of the central supporting portion, in which both ends of an upper arm are mounted on the side supporting portions to support the other end of the shock absorber and to be coupled to a wheel; and vehicle mounting portions forming by being bent from the side supporting portions.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: June 11, 2019
    Assignee: POSCO
    Inventors: Jae-Hyun Kim, Yeon-Sik Kang, Chang-Gyun Jung
  • Patent number: 10315701
    Abstract: The present invention provides a pillar member of a vehicle, which is characterized by comprising: a pillar main body portion; and a connecting and joining portion provided on both ends of the pillar main body portion and coupled to a vehicle body. The pillar main body portion and the connecting and joining portion are consecutively formed. The connecting and joining portion includes: a first connecting and joining portion provided on one side of the pillar main body portion; and a second connecting and joining portion provided on the other side of the pillar main body portion so as to face the first connecting and joining portion. The pillar main body portion is consecutively formed through a roll forming technique in a region between the first connecting and joining portion and the second connecting and joining portion, and has an odd number of closed cross section portions formed therein.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: June 11, 2019
    Assignee: POSCO
    Inventors: Don-Gun Kim, Han-Ho Choi
  • Patent number: 10301707
    Abstract: Provided is a steel having excellent weldability and impact toughness in a welding zone comprising: by weight (wt.) %, carbon (C): 0.1% to 0.3%, manganese (Mn): 11% to 13%, iron (Fe) as a residual component thereof, and other inevitable impurities, and positive and negative segregation zones in a layered form. The positive segregation zone comprises austenite and epsilon martensite, and the negative segregation zone comprises, by area fraction, epsilon martensite of less than 5% and alpha martensite.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: May 28, 2019
    Assignee: POSCO
    Inventors: Hak-Cheol Lee, In-Shik Suh, Yong-Jin Kim, In-Gyu Park
  • Publication number: 20190153559
    Abstract: A clad steel plate, having excellent strength and formability, may include a base material; and a cladding material provided on both side surfaces of the base material, wherein the base material is austenitic high-manganese steel comprising, by weight, 0.3% to 1.4% of C, 12% to 25% of Mn, and a remainder of Fe and inevitable impurities, the cladding material is a martensitic carbon steel comprising, by weight, 0.09% to 0.4% of C, 0.3% to 4.5% of Mn, and a remainder of Fe and inevitable impurities.
    Type: Application
    Filed: June 23, 2017
    Publication date: May 23, 2019
    Applicant: POSCO
    Inventors: Tae-Jin SONG, Man-Young PARK, Won-Tae CHO
  • Patent number: 10294541
    Abstract: Disclosed are a quenched steel sheet and a method for manufacturing the same. The quenched steel sheet according to an aspect of the present invention contains, in terms of wt %, C: 0.05˜0.25%, Si: 0.5% or less (excluding 0), Mn: 0.1˜2.0%, P: 0.05% or less, S: 0.03% or less, the remainder Fe, and other unavoidable impurities, wherein a refined structure of the steel sheet comprises 90 volume % or more of martensite with a first hardness and martensite with a second hardness.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: May 21, 2019
    Assignee: POSCO
    Inventors: Kyong-Su Park, Jae-Hoon Jang
  • Patent number: 10286432
    Abstract: A continuous casting and rolling apparatus according to one embodiment of the present invention comprises: a continuous casting apparatus for producing a steel sheet; a roller, linked to the continuous casting apparatus, for receiving the steel sheet; and a push heat unit, connected to the continuous casting apparatus and/or the roller, for selectively carrying outing heating work or removal work with respect to a portion of the steel sheet. Also, a continuous casting and rolling method according to another embodiment of the present invention may comprise: a continuous casting step for producing a steel sheet; and a selective performance step for selectively carrying out heating work or removal work with respect to a portion of the steel sheet.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: May 14, 2019
    Assignee: POSCO
    Inventors: Jea-Sook Chung, Il-Sin Bae, Suk-Cheol Song, Young-Ju Ko, Kyeong-Mi Park, Jong-Hwan Lee
  • Publication number: 20190136339
    Abstract: Provided is a high-strength cold rolled steel sheet having high shear processability, including, by wt %, C: 0.05% to 0.10%, Si: 0.01% to 0.5%, Mn: 1.2% to 2.0%, Al: 0.01% to 0.1%, Cr: 0.005% to 0.3%, B: 0.0003% to 0.0010%, Mo: 0.005% to 0.2%, P: 0.001% to 0.05%, S: 0.001% to 0.01%, N: 0.001% to 0.01%, Nb: 0.005% to 0.08%, Ti: 0.005% to 0.13%, V: 0.005% to 0.2%, and a balance of Fe and inevitable impurities. The high-strength cold rolled steel sheet satisfies Formulas 1 and 2 below, and the high-strength cold rolled steel sheet includes at least one of carbides, nitrides, and carbonitrides. Formula 1: 2.0?[Mn]+2.5[Mo]+1.5[Cr]+300[B]?2.5, Formula 2: 0.2?([Nb]/93+[Ti]/48+[V]/51)/([C]/12+[N]/14)?0.5 (in Formulas 1 and 2, each element symbol refers to a weight percent (wt %) of a corresponding element).
    Type: Application
    Filed: November 18, 2016
    Publication date: May 9, 2019
    Applicant: POSCO
    Inventors: Sung-Il KIM, Seok-Jong SEO
  • Patent number: 10280491
    Abstract: Provided is a lean duplex stainless steel used in industrial facilities including fresh water, pulp and paper making, chemical and construction facilities. The lean duplex stainless steel comprises, in weight percentage (%), C: over 0 to 0.06 or less, Si: over 0 to 1.5% or less, Mn: over 0 to 2% or less, Cr: 19 to 23%, Ni: 1.8 to 3.5%, Mo: 0.5 to 1.0%, Cu: 0.3 to 1.0%, N: 0.16 to 0.30%, Al: 0.003 to 0.05%, B: 0.001 to 0.005% and Ca: 0.001 to 0.01%. In the stainless steel, the content of O of the stainless steel is 0.01% or less. The stainless steel comprises Fe and other unavoidable impurities as remnants.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: May 7, 2019
    Assignee: POSCO
    Inventors: Ji Soo Kim, Sang Kon Ahn, Bong Wn Kim, Kwang Tae Kim
  • Patent number: 10279436
    Abstract: Provided is a flux-cored arc welding material having remarkable impact resistance and abrasion resistance. The flux-cored arc welding material having remarkable impact resistance and abrasion resistance comprises: 0.1-0.75 wt % of C; 0.2-1.2 wt % of Si; 15-27 wt % of Mn; 2-7 wt % of Cr; 0.01 wt % or less of S; 0.018 wt % or less of P; 4.3-15 wt % of TiO2; 0.01-9 wt % of at least one selected from the group consisting of SiO2, ZrO2 and Al2O3; and the balance of Fe and other inevitable impurities. Further provided are a welding joint capable of all-position welding and having remarkable weldability, low temperature impact toughness and abrasion resistance, and thus a welding material very preferably applied to the manufacture of pipes used in the oil sand industry field and the like.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: May 7, 2019
    Assignee: POSCO
    Inventors: Bong-Keun Lee, Il-Wook Han, Jeong-Kil Kim, Sang-Chul Lee, Dong-Ryeol Lee, Geug Kim
  • Patent number: 10273556
    Abstract: The present invention relates to a lightweight steel sheet and a method of manufacturing the same, wherein high strength and ductility can be achieved in the lightweight steel sheet even when a small amount of carbon and manganese is added, by preventing loss of austenite due to decarburizing through inhibiting decarburization, which occurs during a heat treatment step of a steel sheet containing austenite.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: April 30, 2019
    Assignee: POSCO
    Inventors: Jai-Hyun Kwak, Min-Seo Koo, Dong-Seoug Sin
  • Patent number: 10265795
    Abstract: There are provided a method for manufacturing an electrical steel sheet laminated core having reduced core loss and improved strength, and a laminated core produced by the manufacturing method. The method includes: stacking electrical steel sheets to obtain a lamination; and welding an outer surface of the lamination, wherein during the welding, a welding wire having a resistivity of 6.5×10?7 ?m or greater, a relative permeability of less than 1.02, and a melting point lower than that of the electrical steel sheets is used as a welding material.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: April 23, 2019
    Assignee: POSCO
    Inventors: Sang-Ho Uhm, Chung-Ha Kim, Ji-Hyun Kim, Won-Seog Bong