HYUNDAI STEEL COMPANY Patent applications |
Patent application number | Title | Published |
20140290026 | METHOD OF MANUFACTURING A SLAG DISCHARGE DOOR - The present invention relates to a method of manufacturing a slag discharge door, which is provided separately from a molten-steel discharge opening in an electric furnace and opens and closes a slag discharge opening for discharging slag. The method of manufacturing the slag discharge door, which moves up and down on the slag discharge opening to open and close the slag discharge opening, includes the steps of: forming a door body by forging, forming a coolant passage, a coolant inlet, and a coolant outlet in the door body by drilling, and then finishing a passage that blocks a portion that is open toward an outer surface of the door body. | 10-02-2014 |
20140091503 | METHOD FOR RECOVERING VALUABLE METALS FROM SLAG AND APPARATUS FOR MANUFACTURING MULTIFUNCTIONAL AGGREGATE - An apparatus for recovering valuable metals and manufacturing multifunctional aggregate from slag. The apparatus includes a slag reforming processing pot | 04-03-2014 |
20140068957 | APPARATUS FOR MEASURING THE SHAPE OF A MATERIAL - An apparatus for measuring the shape of a material includes: a width roller configured to roll a width of the material; a plurality of transfer rollers arranged in a rear side of the width roller to transfer the width rolled material; and a measurement unit disposed between the transfer rollers to contact the material moved over the transfer rollers to measure the shape of the material. | 03-13-2014 |
20140065563 | MATERIAL HEATING METHOD - A material heating method includes: a step of charging a silicon-containing carbon steel material into a heating furnace; a step of preheating the material; a first heating step of raising the temperature of the material; a second heating step of lowering the temperature of the material so as to reduce a temperature difference between the surface and inside of the material; a third heating step of raising the temperature of the material; and a soaking step of reducing the temperature difference between the surface and inside of the material. The temperature of the material in the heating furnace is maintained at the melting point of fayalite or lower. | 03-06-2014 |
20140047886 | STEAM-BLOCKING APPARATUS - A steam-blocking apparatus includes: a rolling mill configured to roll a material; a transfer roller disposed at a rear side of the rolling mill and configured to transfer the material from the rolling mill; a descaler disposed above the transfer roller and configured to spray wash water toward the transfer roller; a width-measuring part disposed at a rear side of the descaler and configured to measure the width of the material; and a shield disposed between the descaler and the width-measuring part and configured to prevent steam, generated from evaporation of the wash water, from being introduced into the width-measuring part. | 02-20-2014 |
20140029643 | ROOF FOR ELECTRIC FURNACE - Disclosed herein is a roof for an electric furnace. The roof includes: a small-ceiling seating port ( | 01-30-2014 |
20140029642 | ROOF FOR LADLE FURNACE - The present invention relates to a roof for a ladle furnace which can be compatible with a dust collection elbow or with a dust collection hood. The roof according to the present invention includes a side part ( | 01-30-2014 |
20130228958 | APPARATUS FOR ATOMIZING MOLTEN SLAG AND RECOVERING VALUABLE METAL - The present invention relates to an apparatus for atomizing molten slag and recovering valuable metals, and more particularly to an apparatus for atomizing molten slag and recovering valuable metals, which enables molten slag of a blast furnace or a converter or an electric furnace to be atomized and valuable metals to be recovered. | 09-05-2013 |
20130224063 | STEEL PLATE FOR PIPELINE, HAVING EXCELLENT HYDROGEN INDUCED CRACK RESISTANCE, AND PREPARATION METHOD THEREOF - Disclosed are a steel plate for a line pipe having excellent hydrogen induced crack resistance with a tensile strength of 450 MPa or more, and a preparation method thereof. According to the present invention, the steel plate for a line pipe, having excellent hydrogen induced crack resistance comprises: 0.03-0.05 wt % of carbon (C); 0.2-0.3 wt % of silicon (Si); 0.5-1.3 wt % of manganese (Mn); 0.010 wt % or less of phosphorus (P); 0.005 wt % or less of sulfur (S); 0.02-0.05 wt % of aluminum (Al); 0.2-0.5 wt % of nickel (Ni); 0.2-0.3 wt % of chromium (Cr); 0.03-0.05 wt % of niobium (Nb); 0.02-0.05 wt % of vanadium (V); 0.01-0.02 wt % of titanium (Ti); 0.001-0.004 wt % of calcium (Ca); and a balance of iron (Fe) and inevitable impurities, and has a tensile strength of 450 MPa or more. | 08-29-2013 |
20130220147 | SCRAP COMPACTOR AND APPARATUS FOR MANUFACTURING SAME - The present invention relates to a scrap compactor and to an apparatus for manufacturing same. The apparatus for manufacturing scrap compactors includes a core by means of which a through-hole can be formed in a scrap compactor (S), improves the melting behavior of the scrap compactor by means of the through-hole (h), and also has the effect of preventing the deliberate misrepresentation of the weight of the contents of the scrap compactor carried out by inserting heavy substances into the scrap compactor instead of scrap. | 08-29-2013 |
20130211738 | DEVICE AND METHOD FOR DIAGNOSING CRACKS IN A SOLIDIFIED SHELL IN A MOLD - The present invention relates to a system and method for diagnosing cracking in a solidified shell in a mold, in which whether longitudinal cracking has occurred in the solidified shell can be diagnosed in real time by using a variation in temperature of the solidified shell in the mold during a continuous casting process. The system comprises: a plurality of temperature sensors arranged in a matrix form in a mold, wherein the plurality of temperature sensors are divided into a first group and a second group based on where cracking occurs; and a processor configured to: calculate a temperature difference between the temperature of the first group and the temperature of the second group from the temperatures detected by the plurality of temperature sensors; and determine, using the calculated temperature difference, whether cracking has occurred in a solidified shell discharged from the mold. | 08-15-2013 |
20130197885 | METHOD FOR PREDICTING DEGREE OF CONTAMINATION OF MOLTEN STEEL DURING LADLE EXCHANGE - The present invention relates to a method for predicting the degree of contamination of molten steel during ladle exchange. The method comprises: setting a casting quantity (Q) and a residual quantity of residual molten steel (Qrm); calculating, based upon the Qrm with proportional coefficients, a casting amount (Qplug) and a casting amount (Qpeak); determining preliminary degrees of contamination; and selecting the smaller of the preliminary degrees to obtain degrees of contamination. | 08-01-2013 |
20130142611 | APPARATUS FOR TURNING STEEL PRODUCTS - The present invention relates to an apparatus for turning steel products. The apparatus comprises a rotating shaft, a first turning plate, and a second turning plate. The first turning plate is fixedly mounted to the rotating shaft with a longitudinal axis of the first turning plate perpendicular to a longitudinal axis of the rotating shaft. The second turning plate is movably mounted to the rotating shaft with a longitudinal axis of the second turning plate perpendicular to a longitudinal axis of the rotating shaft. | 06-06-2013 |
20130098513 | ULTRA-HIGH-STRENGTH STEEL BAR AND METHOD FOR MANUFACTURING SAME - This invention relates to an ultra-high-strength steel bar and to a method of manufacturing the same, in which the steel bar includes C: 0.05 to 0.45 wt %, Si: 0.10 to 0.35 wt %, Mn: 0.1 to 0.85 wt %, Cr: 0.6 to 1.20 wt %, and Mo: 0.05 to 0.35 wt %, with the remainder being Fe, wherein a martensite structure is formed at a surface layer and a fine ferrite structure is formed at a center layer. | 04-25-2013 |
20130064752 | METHOD FOR FIXING CARBON DIOXIDE - The present invention provides a method for carbon dioxide fixation, which comprises extracting an alkali metal component from a raw slag in a first reactor by using an ammonium salt solvent to produce a solution containing the extracted alkali metal component and then reacting the solution with carbon dioxide in a second reactor to produce a carbonate precipitate. With this method, an alkali metal component can be extracted and a carbonate precipitate can be obtained in a simpler and cost-effective manner, among others. | 03-14-2013 |
20130064741 | SYSTEM FOR FIXING CARBON DIOXIDE - The present invention relates to a system fixing carbon dioxide. The system comprises a first reactor for extracting alkali metal components from a slag and a second reactor for carbonating the extracted alkali metal component with carbon dioxide. With this system, carbon dioxide can be fixed in a simpler and cost-effective manner. | 03-14-2013 |
20130052088 | APPARATUS FOR SOLIDIFYING AND CONVERTING CARBON DIOXIDE INTO CARBONATE - The present invention provides an apparatus for solidifying and converting carbon dioxide into carbonate, comprising: an alkali component extraction reactor for extracting an alkali metal component from a raw slag; a carbonation reactor for injecting carbon dioxide into an alkali metal component solution containing the extracted alkali metal component to produce a carbonate precipitate from the alkali metal component solution; a first filtration device connected between the alkali component extraction reactor and the carbonation reactor to separate a post-treatment slag, from which the alkali component is extracted, from the alkali metal component solution; and a second filtration device connected between an inlet of the alkali component extraction reactor and an outlet of the carbonation reactor to separate the carbonate from the alkali metal component solution after the carbonation reaction. | 02-28-2013 |
20130014555 | QUENCHABLE STEEL SHEET HAVING HIGH HOT PRESS WORKABILITY AND METHOD OF MANUFACTURING THE SAME - The quenchable steel sheet has an alloy composition including carbon (C) in an amount of 0.15 to 0.30 wt %, silicon (Si) in an amount of 0.05 to 0.5 wt %, manganese (Mn) in an amount of 1.0 to 2.0 wt %, boron (B) in an amount of 0.0005 to 0.0040 wt %, sulfur (S) in an amount of 0.003 wt % or less, phosphorus (P) in an amount of 0.012 wt % or less, one or more selected from among calcium (Ca) in an amount of 0.0010 to 0.0040 wt % and copper (Cu) in an amount of 0.05 to 1.0 wt %, two or more selected from among cobalt (Co), zirconium (Zr) and antimony (Sb), and iron (Fe). Alloy elements are controlled to increasing hot ductility and enabling pressing at 600 to 900° C. so that a tensile strength of 1400 MPa or more and an elongation of 8% or more are obtained after pressing. | 01-17-2013 |
20120139170 | SLAG DISCHARGE DOOR APPARATUS FOR ELECTRIC FURNACE - A slag discharge door apparatus for an electric furnace is disclosed. The apparatus includes a door which is operated by a door operator to open or close a slag discharge outlet of the electric furnace, and a door support which supports the door in such a way that a portion of a lower end of the door overlaps with the door support, so that slag is inhibited from leaking out of the electric furnace through the slag discharge outlet. | 06-07-2012 |
20120134902 | METHOD OF FIXING CARBON DIOXIDE - A method and system of fixing carbon dioxide is provided. After metal ion components are extracted from, e.g., natural mineral or steel slag through acid treatment, carbon dioxide is injected to fix carbon dioxide by carbonating the same. Since the procedure of pH adjustment is unnecessary, the reaction is carried out effectively and a continuous process is enabled. Accordingly, the disclosed method of fixing carbon dioxide enables effective removal of carbon dioxide produced from the steelmaking industry, thereby significantly reducing greenhouse gas emission and allowing recycling of the discarded steel slag. | 05-31-2012 |
20120128027 | APPARATUS AND METHOD FOR MEASURING THE TEMPERATURE OF A MATERIAL - An apparatus for measuring a temperature of a material includes a body unit disposed on an exit side of a heating furnace; a temperature measuring unit installed on the body unit and constructed to measure a temperature of a material which is extracted from the heating furnace; a foreign substance removing unit installed on the body unit and constructed to inject a fluid toward the material so as to remove foreign substances adhered to the material; and a moving unit installed on the body unit and constructed to move the temperature measuring unit. | 05-24-2012 |
20120085171 | DEVICE FOR MEASURING SPEED OF MATERIAL - A device for measuring a speed of a material includes a body unit disposed at an exit side of a rolling stand and placed below a material which is transferred from the rolling stand; and a speed measuring unit installed on the body unit and constructed to measure a speed of the material transferred from the rolling stand. | 04-12-2012 |
20120074095 | METHOD OF EVALUATING CENTER SEGREGATION OF CONTINUOUS CAST SLAB - A method for evaluating center segregation of a continuous cast slab is provided. The method of the present invention includes (A) creating a center segregation image of a slab using an etching solution comprising a picric acid (C | 03-29-2012 |
20120073779 | METHOD OF CONTINUOUS CASTING OF BEAM BLANK - A method of continuous casting a beam blank adapted for impact absorption is disclosed. The method includes: introducing molten steel into a continuous casting mold from a tundish through an immersion nozzle to perform non-oxidation casting, wherein the immersion nozzle is disposed at one side of the continuous casting mold forming both side flanges of a beam blank, and the molten steel is introduced into the continuous casting mold through the immersion nozzle. The method is advantageous in that it is possible to produce steel adapted for low-temperature impact absorption, and productivity is improved due to the increase of the number of consecutive heats of continuous casting. | 03-29-2012 |
20120073778 | METHOD FOR PREDICTING SURFACE QUALITY OF THIN SLAB HOT ROLLED COIL AND METHOD FOR PRODUCING THIN SLAB HOT ROLLED COIL USING THE SAME - Disclosed is a method of predicting surface quality of a thin slab hot rolled coil. The method includes calculating the Cu equivalent (Cu eq.) of molten steel, applying the calculated Cu equivalent of the molten steel into an equation: 120×(Cu equivalent) | 03-29-2012 |
20120073406 | METHOD AND APPARATUS FOR RECOVERING VALUABLE METALS FROM SLAG AND MANUFACTURING MULTIFUNCTIONAL AGGREGATE - Disclosed is a method and apparatus for recovering valuable metals from slag and manufacturing multifunctional aggregate, wherein a reducing agent is fed into molten slag discharged into a slag pot or a slag reforming pot from a converter or an electric arc furnace thus recovering valuable metals from the molten slag, and then the molten slag is formed into a lightweight porous structure. Accordingly, the valuable metals (Fe, Mn) are recovered from the slag discharged from the converter or electric arc furnace, and slag having low specific gravity is ensured using foaming and controlled cooling and then formed into multifunctional aggregate. | 03-29-2012 |
20120073404 | METHOD OF RECOVERING VALUABLE METAL FROM SLAG - A method of recovering a valuable metal from slag is disclosed. The method includes the steps of: applying a magnetic field whose magnitude is increased in a stepwise fashion to crushed slag to separate a magnetic material from the crushed slag; and introducing a reductant into the separated magnetic material to recover a valuable metal therefrom. The method is advantageous and cost effective because the recovery rate of iron (Fe) from slag exceeds 50% by using a magnetic field, thus reducing the amount of slag to be wasted. | 03-29-2012 |
20120073349 | DIE APPARATUS USING IMMERSION COOLING - The present invention relates to a die apparatus which cools metals after hot pressing. More specifically, the present invention relates to an immersion cooling type die apparatus, in which dies are immersed in a coolant to enhance a cooling rate of the dies while guaranteeing uniform quality. The die apparatus includes an upper die having a pressing surface formed on a lower surface thereof, a lower die having a pressing surface formed on an upper surface thereof, a coolant bath storing a predetermined level of coolant, and a pressing unit driven to lower and compress the upper die onto the lower die, to lower both the upper and lower dies in a compressed state, and to lift the upper and lower dies in a reverse sequence. | 03-29-2012 |
20120073342 | APPARATUS FOR MEASURING THE TEMPERATURE OF A ROLLING MATERIAL - An apparatus for measuring the temperature of a rolling material is capable of accurately measuring the temperature of a rolling material by putting a temperature-measuring unit in contact with a surface of the rolling material that is extracted from a heating furnace and conveyed on a roller table to the next process, and moving the temperature-measuring unit contacting the surface of the rolling material together with the rolling material in the conveyed direction thereof. | 03-29-2012 |
20120045358 | HIGH MANGANESE NITROGEN-CONTAINING STEEL SHEET HAVING HIGH STRENGTH AND HIGH DUCTILITY, AND METHOD FOR MANUFACTURING THE SAME - Provided is a high manganese nitrogen-containing steel sheet. The high manganese nitrogen-containing steel sheet according to the present invention comprises 0.5 to 1.0 wt % of carbon, 10 to 20 wt % of manganese, 0.02 to 0.3 wt % of nitrogen, with a remainder of Fe and unavoidable impurities. The high manganese nitrogen-containing steel sheet according to the present invention produces an austenite phase at room temperature, in which the stacking fault energy is effectively controlled by adding chrome and nitrogen. Accordingly, the high manganese nitrogen-containing steel sheet of the present invention produces a mechanical twin during the plastic deformation of the steel sheet, thereby increasing the work hardening rate, tensile strength, and workability. | 02-23-2012 |
20110159314 | QUENCHABLE STEEL SHEET HAVING HIGH HOT PRESS WORKABILITY AND METHOD OF MANUFACTURING THE SAME - The quenchable steel sheet has an alloy composition including carbon (C) in an amount of 0.15˜0.30 wt %, silicon (Si) in an amount of 0.05˜0.5 wt %, manganese (Mn) in an amount of 1.0˜2.0 wt %, boron (B) in an amount of 0.0005˜0.0040 wt %, sulfur (S) in an amount of 0.003 wt % or less, phosphorus (P) in an amount of 0.012 wt % or less, one or more selected from among calcium (Ca) in an amount of 0.0010˜0.0040 wt % and copper (Cu) in an amount of 0.05˜1.0 wt %, two or more selected from among cobalt (Co), zirconium (Zr) and antimony (Sb), and iron (Fe). Alloy elements are controlled to increasing hot ductility and enabling pressing at 600˜900° C. so that a tensile strength of 1400 MPa or more and an elongation of 8% or more are obtained after pressing. | 06-30-2011 |
20110132503 | METHOD FOR REDUCING EDGE SERRATION DEFECTS IN THIN SLAB - Disclosed herein is a method for reducing edge serration defects in a thin slab, including: reheating a thin slab having an alloy composition including carbon (C), niobium (Nb), aluminum (Al), iron (Fe) and inevitable impurities to uniformalize the thin slab into an austenite structure; controlling precipitates that occur in the reheated thin slab by controlling an temperature of the thin slab discharged from a heat-treatment furnace at a temperature at which niobium carbide (NbC) start to precipitate; and hot-rolling the thin slab. The method is advantageous in that the temperature of a thin slab discharged from a heat-treatment furnace is controlled, so that the edge serration defects in the thin slab can be reduced, thereby improving the productivity of the thin slab. | 06-09-2011 |
20110127002 | CENTERING SUBMERGED ENTRY NOZZLE FOR CONTINUOUS CASTING OF METAL SLAB - The present invention relates to an apparatus for centering a submerged entry nozzle. The present invention includes: a plurality of laser beam generators | 06-02-2011 |
20110079379 | MOLD POWDER SUPPLY APPARATUS USING THE WASTE HEAT OF A TUNDISH - The present invention relates to a mold powder supply apparatus using the waste heat of a tundish, which can collect waste heat from molten steel in the tundish, and preheat and dry mold powder. The mold powder supply apparatus using the waste heat of a tundish according to an embodiment of the present invention includes: a powder hopper that is mounted to a frame close to a tundish to absorb heat radiated from the top of the tundish, through one side; an agitator that agitates mold powder filled in the powder hopper; and a supply pipe that is connected to the bottom of the powder hopper to supply the powder hopper into a mold. | 04-07-2011 |
20110073220 | CONTINUOUS PRESS HARDENING PROCESS AND APPARATUS THEREFOR - The present invention relates to a method of continuous hardening press and an apparatus thereof. The process of continuous press hardening, includes: slab casting that makes a slab by continuous-casting molten steel refined by an electric furnace or a blast furnace, and then reheats and hot-rolls the slab into a hot-rolled steel sheet; blanking that conveys the hot-rolled steel sheet to a blank through a sealed oven and blanks the hot-rolled steel sheet, after the slab casting; and press hardening that conveys the hot-rolled steel sheet to a press die and presses the hot-rolled steel sheet, after the blanking. According to the embodiments of the present invention, since a high-temperature steel sheet formed by hot rolling is directly put into press hardening, reheating is not required such that the entire process is simplified and reduction of manufacturing cost can be expected. | 03-31-2011 |
20110068519 | PRESS HARDENING DIE COOLING DEVICE - The present invention relates to an apparatus for a press hardening die which has a structure improved to decrease cooling rate of trimming portions in pressing a steel plate blank for manufacturing a part for press hardening. A press hardening die cooling device according to an embodiment of the present invention includes: a press hardening die composed of upper and lower dies equipped with cooling water suppliers therein to press a steel plate blank from the top and the bottom; and a cooling water temperature adjuster disposed between the cooling water suppliers of the upper and lower dies and the contact surface of the steel plate blank to adjust temperature of cooling water supplied to the steel plate blank. | 03-24-2011 |
20110068518 | HEATING FURNACE FOR PRESS HARDENING PROCESS - A heating furnace according to an embodiment of the present invention includes: a furnace body that has an inlet at the upper portion through which a steel sheet blank is inserted from a wound coil and an outlet at the lower portion through which the steel sheet blank is discharged, and has a cylindrical structure having a space for conveying the steel sheet blank; a conveyer that is spirally disposed on the inner circumference of the furnace body and sequentially conveys the steel sheet blank from the inlet at the upper portion and the outlet at the lower portion; and a clamping means that is disposed at one side of the conveyer and selectively clamps the steel sheet blank. | 03-24-2011 |
20100172788 | COLD ROLLEDSTEEL SHEET AND METHOD FOR MANUFACTURING THE SAME - A method of manufacturing a cold-rolled steel sheet includes: adding, by weight %, carbon (C) 0.005% or less, nitrogen (N) 0.002 to 0.005%, manganese (Mn) 0.1 to 1.0%, phosphorous (P) 0.005 to 0.1%, niobium (Nb) 0.015 to 0.04%, silicon (Si) 0.30 or less, sulfur (S) 0.02% or less, aluminum 0.001 to 0.03%; adjusting the atomic ratio of Nb/C to 1 or more and the atomic ratio of Al/N to 0.5 to 1.5, homogenizing a steel containing iron (Fe) and elements inevitably contained in manufacturing the steel as the remainder at temperature of 1150 to 1300° C., setting the final hot-rolling temperature to 890 to 950° C. that is over an Ar3 critical point; and hot-winding the hot-rolled steel sheet and cold-rolling the hot-rolled steel sheet at 40 to 80% cold reduction ratio. | 07-08-2010 |