POSCO is a multinational steel-making company headquartered in Pohang, South Korea. It had an output of 39.1 million tonnes of crude steel in 2011, making it the world's fourth-largest steelmaker by this measure. In 2010, it was the world's largest steel manufacturing company by market value. Also, in 2012, it was named as the 146th world's largest corporations by the Fortune global 500.POSCO currently operates two integrated steel mills in South Korea, in Pohang and Gwangyang. In addition, POSCO operates a joint venture with U.S. Steel, USS-POSCO, which is located in Pittsburg, California, United States. Wikipedia.
Posco and Postech Academy Industry Foundation | Date: 2017-02-22
The present invention relates to carbon nanotube fiber and a producing method thereof. The carbon nanotube fiber has a tensile strength which exceeds 5 GPa, and the producing method includes: producing a carbon nanotube fiber precursor consisting of carbon nanotubes; evenly dispersing a cross-linking agent on the carbon nanotube fiber precursor; and acquiring carbon nanotube fiber by thermally treating the carbon nanotube fiber precursor wherein the cross-linking agent is evenly dispersed, wherein the acquired carbon nanotube fiber has cross-linking between wall surfaces of the carbon nanotubes each other.
Posco | Date: 2016-11-03
A twin-roll strip caster includes: a pair of casting rolls rotating in opposite directions to each other, and having an edge dam adhering to both end surfaces of the casting rolls in a length direction of the casting rolls; a submerged nozzle discharging molten steel between the pair of casting rolls; a meniscus shield disposed above the molten steel supplied through the submerged nozzle to prevent the molten steel from contacting air; and a focused gas supply nozzle disposed between the submerged nozzle and the meniscus shield to supply inert gas therebetween so as to displace air between the submerged nozzle and the meniscus shield before the molten steel is supplied.
Posco | Date: 2016-10-27
A surface treatment method capable of preventing a surface defect by improving a surface shape determining surface roughness of a casting roll and a casting roll manufactured by the surface treatment method, are provided. A surface treatment method includes a concave-convex pattern forming operation of forming a concave-convex pattern on a surface of a casting roll; and an electrolytic polishing operation of electrolytically polishing so that a plurality of convex portions and concave portions of a concave-convex pattern formed in the concave-convex pattern forming operation are treated to be rounded.
Posco | Date: 2016-08-25
An apparatus for treating a surface of a strip casting twin roll includes: a laser machining unit configured to form dimple patterns on a surface of a rotating casting roll using a laser; a machining region processing unit, wherein if the casting roll is rotated by a critical angle, the machining region processing unit calculates a size and a position of a machining region, in which a dimple pattern will be formed, based on image information obtained by imaging the machining region; and a laser beam absorbing unit, wherein if the size of the machining region is smaller than a size of the dimple pattern, the laser beam absorbing unit places a screen at an overlap start position from which the machining region and the dimple pattern start to overlap each other, so as to absorb a laser beam emitted toward a peripheral region of the machining region.
Posco | Date: 2017-04-26
There are provided an expandable high-strength steel material and an expanded high-strength steel pipe having excellent expandability and collapse resistance, and methods for manufacturing the expandable high-strength steel material and the expanded high-strength steel pipe. The expandable high-strength steel material including, by weight, manganese (Mn): 12% to 18%, carbon (C): 0.3% to 0.6%, and a balance of iron (Fe) and inevitable impurities, wherein the carbon (C) and the manganese (Mn) satisfy the following condition: 23 35.5C + Mn 38. Before being expanded, the expandable high-strength steel material has an austenite single phase microstructure, and after being expanded, the expandable high-strength steel material has a microstructure including 5 area% to 50 area% martensite and 50 area% to 95 area% austenite.
Posco and Sinjin SM Co. | Date: 2017-05-24
The present invention provides a cutting apparatus comprising: a supply part for supplying an object to be cut; a first cutting part for cutting the object to be cut, provided from the supply part; a carrying part arranged to be consecutive to the first cutting part to carry an intermediate cut object, cut by the first cutting part; and a second cutting part arranged to be consecutive to the carrying part to receive and cut the intermediate cut object from the carrying part, wherein the first and second cutting parts comprise saw blade parts movably and rotatably configured to cut the object to be cut or the intermediate cut object, and the saw blade part has a rotary shaft formed on the upper side of the object to be cut or the intermediate cut object.
Posco | Date: 2017-03-01
Provided are a heat recovery apparatus based on a fuel cell and an operating method thereof. In the fuel cell-based heat recovery apparatus and the operating method thereof, hot water and steam may be generated by using heat generated while a molten carbonate fuel cell (MCFC) operates to supply the generated hot water or steam to buildings, thereby reducing a rate of operation in cooling/heating equipment using electricity so as to reduce air-conditioning costs.
Posco | Date: 2017-06-14
A pre-coating agent composition for a grain-oriednted electrical steel sheet, a grain-oriednted electrical steel sheet including the same, and a manufacturing method thereof are provided. Particularly, a pre-coating agent composition for a grain-oriednted electrical steel sheet including an acid containing boron (B); and a solvent, a grain-oriednted electrical steel sheet including the same, and a manufacturing method thereof are provided.
Posco | Date: 2017-05-31
The present invention relates to a metal fiber manufacturing system. The system casts molten metal as a metal fiber; collects the metal fiber in real time; transfers the metal fiber; separates normal products from defective products; and packages a predetermined amount of the normal product metal fiber. The system processes the cast metal fiber continuously or in batches, and manufactures the same, thereby having effects of improving the efficiency of the production process and obtaining significant economic benefits.
Posco | Date: 2017-07-26
Disclosed is a magnetic domain refining method for radiating a laser beam to a surface of a directional electrical steel plate at intervals, which is capable of further reducing noise along with an iron loss reduction effect and further improving iron loss and noise reduction effects in an area where the directional electrical steel plate are bonded together, such as the joint part of the iron core of a transformer. Irradiated radiations formed by a laser beam in at least any one area of the directional electrical steel plate are unfolded in a fan rib form using one point of the directional electrical steel plate as a central point.