| HYUNDAI STEEL COMPANY Patent applications |
| Patent application number | Title | Published |
|---|
| 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 |
