Patents Assigned to Posco
  • 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: 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: 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: 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: 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: 10265744
    Abstract: A hot rolling device, according to one embodiment of the present invention, may comprise: a cast part supply portion for producing a cast part; a hot roller, linked to the cast part supply portion, for receiving and hot-rolling the cast part; and a heating unit, arranged between the cast part supply portion and the hot roller, for reheating an outer surface portion in the widthwise direction of the cast part while latent heat is maintained in the center portion of the widthwise direction of the cast part from preheating.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: April 23, 2019
    Assignee: POSCO
    Inventors: Jea-Sook Chung, Il-Sin Bae, Young-Ju Ko, Kyeong-Mi Park, In-Jae Lee, Choong-Yun Lee, Suk-Cheol Song, Seong-Yeon Kim, Jong-Yeon Hwang, Sang-Hyeon Lee
  • Patent number: 10266929
    Abstract: Provided is an ultrahigh-strength gas metal arc welded joint having a high degree of impact toughness. The ultrahigh-strength gas metal arc welded joint comprises, by wt %, carbon (C): 0.05% to 0.1%, silicon (Si): 0.2% to 0.7%, manganese (Mn): 1.5% to 2.5%, nickel (Ni): 2.0% to 3.5%, chromium (Cr): 0.3% to 0.9%, copper (Cu): 0.1% to 0.3%, molybdenum (Mo): 0.5% to 0.8%, titanium (Ti): 0.02% to 0.04%, boron (B): 0.002% to 0.005%, aluminum (Al): 0.001% to 0.03%, nitrogen (N): 0.002% to 0.007%, phosphorus (P): 0.03% or less, sulfur (S): 0.03% or less, oxygen (O): 0.02% to 0.05%, and a balance of iron (Fe) and other inevitable impurities, satisfying 0.4?Ti/O?1.2., 2.8?Ti/N?9.0, 10?(2Ti+5B)/N?20, and 3.5?Mn+2Cr+3Mo+3Cu?7.5.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: April 23, 2019
    Assignee: POSCO
    Inventors: Hong-Chul Jeong, Dong-Ryeol Lee, Geug Kim
  • 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
  • Publication number: 20190109521
    Abstract: Disclosed is a core laminator of an adhesive laminate core manufacturing apparatus integrating laminar members to pass therethrough, thereby forming laminate cores.
    Type: Application
    Filed: June 16, 2016
    Publication date: April 11, 2019
    Applicant: POSCO DAEWOO CORPORATION
    Inventors: Il Gwen CHUNG, Duk Kyoun WOO, Chan Jung KIM, Chang Don PARK
  • Patent number: 10253388
    Abstract: The present invention provides: a steel sheet capable of manufacturing a formed product having superior bendability and ultra-high strength when compared with conventional steel sheets for manufacturing a hot press formed product; the formed product having superior bendability and ultra-high strength by using the same; and a method for manufacturing the same.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: April 9, 2019
    Assignee: POSCO
    Inventors: Yeol-Rae Cho, Jae-Hoon Lee, Jin-Keun Oh, Sim-Kun Min, Chang-Sig Choi
  • Publication number: 20190093200
    Abstract: A method for manufacturing a magnesium alloy sheet according to an embodiment of the present invention comprises the steps of casting a molten metal containing 2.7 to 5 wt % of Al, 0.75 to 1 wt % of Zn, 0.1 to 0.7 wt % of Ca and 1 wt % or less (Excluding 0 wt %) of Mn and consisting of the balance of Mg and inevitable impurities to produce a casted material (S10), subjecting the casted material to homogenization heat treatment (S20) and warm-rolling the casted material subjected to homogenization treatment (S30).
    Type: Application
    Filed: December 23, 2016
    Publication date: March 28, 2019
    Applicant: POSCO
    Inventors: Jun Ho PARK, Oh Duck KWON, Hyun Bom LEE, Jae Joong KIM
  • Patent number: 10239041
    Abstract: Disclosed is a carbonation device including: a storage tank storing a carbonation subject solution; a droplet spray unit spraying the carbonation subject solution from the storage tank as droplets; a carbonation reaction tank disposed with the droplet spray unit and filled with a carbonation gas under a predetermined pressure to provide a slurry by a carbonation reaction of the droplet-sprayed carbonation subject solution with the filled carbonation gas; a carbonation gas supply unit supplying the carbonation gas into the carbonation reaction tank to maintain the carbonation gas in the carbonation reaction tank under the predetermined pressure; and a slurry outlet unit ejecting the slurry from the carbonation reaction tank to maintain the slurry formed in the carbonation reaction tank within a predetermined level, and a method of carbonation using the same.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: March 26, 2019
    Assignees: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, MPPLY CO., LTD.
    Inventors: Uong Chon, Im Chang Lee, Ki Young Kim, Gi-Chun Han, Woonkyoung Park, Kee Uek Jeung, Chang Ho Song
  • Patent number: 10239143
    Abstract: A slab scarfing apparatus comprises: an upper nozzle unit having an upper surface nozzle for scarfing an edge portion of the upper surface of a slab and having a first side nozzle scarfing an upper edge portion of the side surface of the slab and moving together with the upper surface nozzle; a lower nozzle unit having a lower nozzle for scarfing an edge portion of the lower surface of the slab and having a second side nozzle scarfing a lower edge portion of the side surface of the slab and moving together with the lower nozzle; and a moving apparatus for moving the upper nozzle unit and the lower nozzle unit to allow the upper nozzle unit and the lower nozzle unit to be adjacent to or to be spaced apart from an edge portion of the slab. A method of controlling the apparatus is provided.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: March 26, 2019
    Assignee: POSCO
    Inventors: Seung-Ho Lim, Yeong-Seon Park, Seong-Yeon Kim, Ki-Hwan Kim, Ji-Won Yu
  • Patent number: 10233527
    Abstract: A cooling apparatus for a plated steel sheet according to the present invention comprises: an injection means for injecting a cooling fluid while facing a steel sheet in progress; and an injection width varying means for varying the injection width of the cooling fluid so as to correspond to the width of the steel sheet, installed at the outside of the injection means so as to not interfere with the injection flow path of the cooling fluid.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: March 19, 2019
    Assignee: POSCO
    Inventors: Jung-Kuk Kim, Yeon-Chae Jeung
  • Patent number: 10233088
    Abstract: A coating agent for an electrical steel sheet and a manufacturing method therefor are disclosed. A coating agent for an electrical steel sheet according to an example embodiment of the present invention includes a metal phosphate derivative solution, colloid silica, chromium oxide, and solid silica, and a solvent, wherein the metal phosphate derivative is a single material of a magnesium phosphate derivative or a mixed material of an aluminum phosphate derivative and a magnesium phosphate derivative, and in the mixed material, an amount of aluminum phosphate derivative is 10 wt % or less (not including 0%).
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: March 19, 2019
    Assignee: POSCO
    Inventors: Min Soo Han, Chang Soo Park, Dae-Uk Kim, Ho-Kyung Shim, Soon-Bok Park
  • Publication number: 20190078174
    Abstract: Disclosed are a steel wire rod having excellent low temperature impact toughness and a manufacturing method therefor. The steel wire rod having excellent low temperature impact toughness according to an embodiment of the present invention contains, by weight %, carbon (C): 0.40-0.90%, silicon (Si): 0.5-1.0%, manganese (Mn): 11-25%, copper (Cu): 1.0-3.0%, phosphorus (P): 0.020% or less, sulfur (S): 0.020% or less, aluminum (Al): 0.010-0.050%, nitrogen (N): 0.0010-0.0050%, and the remainder being Fe and unavoidable impurities. The steel wire rod has a microstructure which contains an austenite phase having an area fraction of 95% or more, and a volume fraction of a deformation twin formed in an austenite grain is 1-8%. Therefore, it is possible to provide a steel wire rod having excellent low temperature impact toughness used in industrial machines or automobile parts, etc.
    Type: Application
    Filed: November 18, 2016
    Publication date: March 14, 2019
    Applicants: POSCO, POSCO
    Inventors: Hyong-Jik LEE, Young-Soo CHUN