Abstract: The present invention relates to a method for preparing a continuous carbon fiber-reinforced thermoplastic prepreg, and more specifically, to a method for preparing a continuous carbon fiber-reinforced thermoplastic semi-prepreg or prepreg, comprising the steps of: providing a plurality of carbon fibers having an increased width; preparing a layered product by arranging a thermoplastic film on at least a part of the upper and lower portions of the carbon fibers having an increased width; and preparing a joined product by joining the thermoplastic film and the carbon fibers comprising the layered body.
Type:
Application
Filed:
December 24, 2013
Publication date:
November 26, 2015
Applicants:
POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Inventors:
Il-Joon BAE, Ik-Pyo HONG, Sei-Min PARK, Sung-Young LEE
Abstract: A high strength thin steel sheet that is mainly used for structural members and inner and outer panels for a vehicle, a galvanized steel sheet, and methods of manufacturing the same. The high strength thin steel sheet for superior press formability includes, by weight percent, 0.06 to 0.4% C, 1.0 to 5.0% Mn, 0.05 to 2.5% Si, 0.01 to 2.0% Ni, 0.02 to 2% Cu, 0.01 to 0.04% Ti, 0.05 to 2.5% Al, 0.005 to 0.1% Sb, 0.0005 to 0.004% B, 0.007% or less N, and balance Fe and inevitable impurities, and meeting relation of Ni+0.5×Mn+0.3×Cu>0.9, which is defined as Ni*, and Al/Ni*<1.3 at a same time, and relation of Ti?0.028×Al. This thin steel sheet is galvanized or galvannealed.
Abstract: There are provided a method for manufacturing a high manganese hot-dip galvanized steel sheet having superior coatability and ultra-high strength, and a high manganese hot-dip galvanized steel sheet manufactured by the method. The method includes: cold rolling a hot-rolled steel sheet to form a cold-rolled steel sheet, the hot-rolled steel sheet including, by wt %, C: 0.3% to 1%, Mn: 8% to 25%, Si: 0.1% to 3%, Al: 0.01% to 8%, Cr: 0.1% to 2%, Ti: 0.01% to 0.2%, B: 0.0005% to 0.01%, Ni: 0.01% to 2%, Sn: 0.06% to 0.2%, and a balance of Fe and inevitable impurities; heating the cold-rolled steel sheet; cooling the heated steel sheet to, or maintaining the heated steel sheet; and performing a hot-dip galvanizing process on the cooled or temperature-maintained steel sheet by dipping the cooled or temperature-maintained steel sheet into a hot-dip galvanizing bath.
Type:
Application
Filed:
December 19, 2013
Publication date:
November 19, 2015
Applicant:
POSCO
Inventors:
Sun-Ho JEON, Kwang-Geun CHIN, Won-Tae CHO
Abstract: A phosphate solution for a zinc or zinc-based alloy plated steel sheet, and a zinc or zinc-based alloy plated steel sheet using the same are provided. The phosphate solution for a zinc or zinc-based alloy plated steel sheet contains a molybdenum (Mo) ion, a calcium (Ca) ion and a phosphate ion. A zinc or zinc-based alloy plated steel sheet includes a base steel sheet, a zinc-based or zinc alloy-based plating layer formed on the base steel sheet, and a phosphate film formed on the zinc-based or zinc alloy-based plating layer. The phosphate film contains a molybdenum compound, Ca and a phosphate. A pitting phenomenon occurring at the time of treating a steel sheet with a phosphate is prevented, and excellent corrosion resistance is exhibited on a phosphate film.
Abstract: Provided are a graphene oxide, a graphene-polymer complex, a coating solution containing same, a graphene-polymer complex-coated steel sheet, and a method for manufacturing same. According to the present invention, a steel sheet is provided, in which graphenes can be directly coated to a base steel sheet without using a separate binder and said graphenes can be located on a coating layer, thus properties of the graphenes can be efficiently exhibited.
Type:
Application
Filed:
December 28, 2012
Publication date:
November 19, 2015
Applicant:
POSCO
Inventors:
Hye-Jin YOO, Joong-Kyu KIM, Yong-Gyun JUNG, Jong-Sang KIM
Abstract: An ultra high-strength flux-cored arc welded joint having excellent impact toughness comprises: 0.01 wt % to 0.06 wt % of carbon (C), 0.1 wt % to 0.5 wt % of silicon (Si), 1.5 wt % to 3.0 wt % of manganese (Mn), 2.5 wt % to 3.5 wt % of nickel (Ni), 0.5 wt % to 1.0 wt % of molybdenum (Mo), 0.4 wt % to 1.0 wt % of copper (Cu), 0.4 wt % to 1.0 wt % of chromium (Cr), 0.01 wt % to 0.1 wt % of titanium (Ti), 0.003 wt % to 0.007 wt % of boron (B), 0.001 wt % to 0.006 wt % of nitrogen (N), 0.02 wt % (excluding 0) or less of phosphorus (P), 0.01 wt % (excluding 0) or less of sulfur (S), 0.03 wt % to 0.07 wt % of oxygen (O), and remaining iron (Fe) as well as unavoidable impurities.
Abstract: A hot-rolled stainless steel sheet having excellent hardness and low-temperature impact properties, in which a ferrite is formed with martensite as a matrix structure, is manufactured by a steel manufacturing process, a continuous casting process, and a hot-rolling process. The hot-rolled stainless steel sheet comprises C, N, Si, Mn, Cr, Ni, Ti, Nb, Mo, and the remainder being Fe and other inevitable impurities, wherein C is 0.01 to 0.03 wt %, Cr is 11 to 14 wt %, Ti is 0.1 to 0.2 wt %, and Nb is 0.1 to 0.2 wt %. The ferrite stability (FS) expressed by the following [formula 1] is 5 to 50, and a ferrite is formed with martensite as a matrix structure. [Formula 1] 4 FS=?215?619C?16.6Mn+23.7Cr?36.8Ni+42.2Mo+96.2Ti+67Nb?237N+17.2Si, wherein the numerical value of each component described in [Formula 1] denotes the content (wt %) of each component.
Type:
Application
Filed:
December 27, 2012
Publication date:
November 5, 2015
Applicant:
POSCO
Inventors:
Dong Chul CHAE, Gyu Jin JO, Jae Hwa LEE, Kwang Yuk KIM
Abstract: The present patent application describes a cantilever for atomic force microscopy (AFM), which includes a cantilever body having a fixed end and a free end, the free end having a surface region being chemically modified by a dendron in which a plurality of termini of the branched region of the dendron are bound to the surface, and a terminus of the linear region of the dendron is functionalized.
Type:
Grant
Filed:
March 17, 2014
Date of Patent:
November 3, 2015
Assignees:
POSCO, POSTECH FOUNDATION
Inventors:
Joon Won Park, Yu Jin Jung, Bong Jin Hong, Saul Tendler, Stephanie Allen
Abstract: Provided is a metal coated steel sheet having a coating layer including a metal having a level of Gibbs free energy equal to that of Fe or above and an oxide thereof. Accordingly, the quality of a plated steel sheet may be improved by preventing the generation of bare spots through inhibition of the formation of Mn oxide, Si oxide, or Al oxide on the surface thereof, and simultaneously, the complexity of a manufacturing facility or an increase in manufacturing costs may be minimized. Economic benefits are thus realized.
Type:
Grant
Filed:
October 21, 2011
Date of Patent:
November 3, 2015
Assignee:
POSCO
Inventors:
Myung-Soo Kim, Ju-Youn Lee, Young-Ha Kim, Jong-Sang Kim
Abstract: The present invention relates to a system and method for providing MultiCast and BroadCast Service (MCBCS). According to the present invention, the MCBCS system and method supports session start and data path registration procedures, join and leave procedure for providing the MCBCS with static or dynamic multicast service schemes, and supports procedures for providing to mobile stations operating in idle mode. Accordingly, the present invention enables effectively implementing the MCBCS in a wireless communication system, particularly in WiMAX system, and provides the MCBCS according to the mobile stations operating in idle mode.
Abstract: There is provided a strip casting method using a twin roll strip casting process in which molten steel is supplied through an injection nozzle to a region between twin rolls rotating in opposite directions to produce a strip having a predetermined thickness and a high degree of edge quality. The twin roll strip casting method includes: performing the casting process by setting a casting thickness to have a minimal value during an early stage of the casting process in which edge bulging occurs; and performing the casting process by increasing the casting thickness to a maximum value after the molten steel reaches a pre-set target temperature as the casting process proceeds.
Abstract: A power generation system which is a fuel cell system including a preheating device that preheats a fuel, a preliminary reforming device that reforms the preheated fuel, a fuel cell stack module in which the reformed fuel reacts to generate electric power, and a circulating device that selectively supplies a product generated in the fuel cell stack module to the preheating device.
Abstract: The present invention relates to a lithium manganese composite oxide and a method for preparing the same, and more particularly, to a lithium manganese composite oxide and a method for preparing same, in which a wet-milling process and a spray-drying process are applied, and the abundance ratio of Mn3+ ions to Mn4+ ions at the surface of the composite oxide is adjusted by controlling an oxidizing atmosphere during heat treatment.
Abstract: A mandrel of a coil box comprises: a cylindrical mandrel body having a center shaft disposed therein and a slot into which a front end portion of a hot bar is inserted; and a guide part which is arranged towards the inside of the mandrel body from a peripheral wall of one side of the slot so as to prevent the cooling and plastic deformation of the front end portion of the bar inserted through the slot.
Type:
Application
Filed:
November 20, 2013
Publication date:
October 22, 2015
Applicant:
POSCO
Inventors:
Choong-Yun LEE, Sang-Hyeon LEE, Sung-Lim LEE
Abstract: Provided are an organic-inorganic hybrid coating solution composition including 12 wt % to 36 wt % of a urethane-acryl hybrid resin, 8 wt % to 24 wt % of a nanosilicate-phenoxy hybrid resin, and 40 wt % to 80 wt % of an inorganic-based anti-corrosion agent based on a solid content, and an organic-inorganic hybrid coated steel sheet having a coating layer formed with the coating solution composition. A coating solution composition having excellent solution stability and a coated steel sheet having improved corrosion resistance, solvent resistance, and conductivity may be provided.
Type:
Application
Filed:
December 27, 2012
Publication date:
October 22, 2015
Applicant:
POSCO
Inventors:
Kyoung-Pil Ko, Rho-Bum Park, Jong-Sang Kim, Jung-Hwan Lee
Abstract: Provided is a vehicle seat structure that is lighter than a steel vehicle seat structure while providing the same function thereof. For this, the vehicle seat structure includes a seat cushion frame and a seat back frame connected to the seat cushion frame. At least one of components constituting the seat back frame and the seat cushion frame is formed of a magnesium plate produced through a rolling process and that has a texture.
Type:
Grant
Filed:
December 28, 2011
Date of Patent:
October 20, 2015
Assignee:
POSCO
Inventors:
Min-Hong Seo, Kang-Hwan Ahn, Tae-Oh Lee
Abstract: Provided are a method for reusing an iron-containing by-product and an apparatus configured to use the method. The method include: forming briquettes by mixing an iron-containing by-product with 5 parts by weight to 20 parts by weight of carbon, based on 100 parts by weight of the iron-containing by-product; preliminarily reducing the briquettes within a temperature range of 800° C. to 1300° C.; and supplying the preliminarily reduced briquettes to an electric furnace. The apparatus includes: a reducing furnace in which briquettes formed by mixing an iron-containing by-product with 5 parts by weight to 50 parts by weight of carbon, based on 100 parts by weight of the iron-containing by-product is reduced within a temperature range of 800° C. to 1300° C.; and an electric furnace to which the preliminarily reduced briquettes are supplied.
Abstract: The present invention relates to a method for preparing a composition for the surface treatment of metal, a surface-treated steel sheet which is surface-treated with the composition and to a method for manufacturing the surface-treated steel sheet. To accomplish the objective, the method of the present invention may involve the preparing of a composition for the surface treatment of metal using graphene having superior characteristics such as corrosion resistance, electrical conductivity and thermal conductivity. The composition may be effectively coated onto the metal surface by means of electrophoresis, and thus a highly functional surface-treated steel sheet can be obtained.
Type:
Application
Filed:
December 28, 2012
Publication date:
October 15, 2015
Applicant:
POSCO
Inventors:
Hyun-Ju Jeong, Jae-Hun Choi, Byeng-Su Kim, Hyun-Tae Kim, Jae-Kon Lee
Abstract: A method of manufacturing iron-based powder includes providing an iron-based molten steel manufactured through a iron making process and a steelmaking process to a tundish; and performing water atomization over the molten steel discharged through a nozzle connected to the tundish. The iron-based powder is manufactured from the molten steel refined after a molten iron tapped from a iron making process is charged into a converter without a pre-treatment process of the molten iron, thus economically providing the highly clean iron-based powder.
Type:
Grant
Filed:
September 15, 2011
Date of Patent:
October 13, 2015
Assignees:
POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Inventors:
Ha Neul Kim, Eon Sik Lee, Oh-Joon Kwan, Sun Jong Park, Hee Soo Kang
Abstract: Provided is a method of manufacturing a high-carbon hot-rolled steel sheet, including the steps of i) preparing high-carbon steel materials comprising C: 0.7 to 0.9%, Si: 0.5% or less, Mn: 0.1 to 1.5%, Cr: 0.5% or less, P: 0.05% or less, and S: 0.03% or less in wt % and remaining Fe and other inevitable impurities; ii) heating the high-carbon steel materials again and manufacturing a steel sheet by performing hot rolling in an austenite region in which a finishing temperature for the hot rolling is an Ar3 transformation temperature or higher; iii) rapidly cooling the steel sheet at 520 to 620° C. before phase transformation is started in a Run-Out Table (ROT); iv) uniformly maintaining a cooling retention temperature so that the cooled steel sheet is subject to phase transformation in any one temperature between 520 to 620° C.; and v) winding the steel sheet in the cooling retention temperature. Also provided is the high-carbon steel sheet made by the above-described method.