Patent application number | Description | Published |
20080276679 | Method for the Production of Hot-Rolled Steel Strip and Combined Casting and Rolling Plant for Carrying Out the Method - A method for the production of a hot-rolled steel strip from a steel melt in a continuous manufacturing process, with an uninterrupted strip runthrough, comprising continuously casting a steel strand in a continuous casting mold of a continuous casting plant, roll-forming the cast steel strand in a first group of roll stands into a pre-rolled hot strip, further roll-forming the pre-rolled hot strip in a second group of roll stands into a hot-rolled steel strip, setting the pre-rolled hot strip to a rolling temperature between the first group of roll stands and the second group of roll stands in a temperature setting device, and winding of the hot-rolled steel strip into bundles or the division of the hot-rolled steel strip into sheets. In order to increase flexibility in the production of different steel qualities and to keep investment costs and operating costs low, descaling the pre-rolled hot strip immediately before its entry into the temperature setting device, holding the pre-rolled hot strip in a protective gas atmosphere in the temperature setting device, and after the pre-rolled hot strip runs through the temperature setting device, roll-forming the strip immediately thereafter in the second group of roll stands. Further, a combined casting and rolling plant for carrying out the method is disclosed. | 11-13-2008 |
20090049882 | PROCESS AND APPARATUS FOR THE CONTINUOUS PRODUCTION OF A THIN METAL STRIP - Processes for continuous production of a thin metal strip, in particular a steel hot strip, directly from a metal melt and with a strip cast thickness of <10 mm by the roll-casting process. The cast metal strip is fed for in-line thickness reduction, and then to a storage device. To achieve a high-quality, hot-rolled metal strip with flatness tolerances comparable to those which can currently be achieved in the production of hot-rolled metal strip from continuous-cast thin slabs or slabs, at cast thicknesses of between 40 and 300 mm, in a continuous production process starting directly from metal melt. With the low strip cast thickness, a flatness measurement is performed on the moving metal strip, and the measurement results of this flatness measurement are used to influence the flatness of the metal strip in a targeted way. | 02-26-2009 |
20090100891 | BENDING DEVICE FOR TWO WORKING ROLLS OF A ROLLING STAND - A bending device for two working rolls of a rolling stand. Guide blocks provided in lateral roll housings for guiding two pressure-transmission bodies vertically adjustable with respect to each other and, on which the working rolls are supported via chocks. Bending cylinders are arranged in pairs between the pressure-transmission bodies at each end of the rolls. Each cylinder has a piston rod acting on one pressure-transmission body and a cylinder at the respective other pressure-transmission body. Each pressure-transmission body is supported on a respective guide block in a sliding manner. So that loads acting on the pressure-transmission bodies can be introduced into the guide block free of edge pressure, the pressure-transmission bodies are supported on the respective guide blocks in a sliding manner by self-adjusting wearing plates which include surfaces that enable both sliding and pivoting of the bodies with respect to the guide blocks. | 04-23-2009 |
20100018665 | PROCESS FOR PRODUCING A STEEL STRIP - A process for producing a strip-cast, low-carbon, partly Mn/Si killed steel strip which is largely free of cracks and surface defects from a steel melt having a sulfur content of between 20 and 300 ppm and an Mn/Si ratio ≧3.5, using a roll separating force of between 2 and 50 kN/m. | 01-28-2010 |
20100078146 | METHOD FOR PRODUCING A CAST STEEL STRIP - The invention relates to a method for producing a cast steel strip of preferably hot crack-sensitive or hot-brittle steel quality by means of a strip casting plant and to a strip casting plant for carrying out this method. In this case, steel melt is conducted into a melt space formed by two casting rolls and two sideplates, slab shells are formed in the melt space on cooled surface areas of the casting rolls and are brought together in the strip forming cross section between the casting rolls to form an at least partly solidified steel strip, the cast steel strip is then guided along the surface area of one of the two casting rolls from a vertical casting direction into an essentially horizontal transport direction, and the cast steel strip is supplied essentially horizontally on a transport device to a strip winding device and is wound there into a coil. In order in this case to minimize susceptibility to crack formation, the cast steel strip, during its transport movement along the surface area of one of the two casting rolls, is guided in a transport channel without the application of deformation forces influencing the strip thickness and is subjected in this region to strip cooling of less than 200 K/s. | 04-01-2010 |
20100292061 | CYLINDER AND/OR ROLLER AND A PROCESS FOR THE PRODUCTION OF A CYLINDER AND/OR ROLLER - in a cylinder and/or a roller and in a method for producing and/or for the maintenance of a cylinder and/or roller, a metal layer ( | 11-18-2010 |
20110056649 | PROCESS AND APPARATUS FOR A COMBINED CASTING AND ROLLING INSTALLATION - A method and an apparatus for producing hot-rolled products in a combined casting-rolling installation. A method and a combined casting-rolling installation with which an uninterrupted continuous casting process can be maintained not only when there is a planned interruption to production but also when there is an unplanned interruption to production, occurring for example in a heating zone, a finishing mill train, a cooling zone or a storage device. This method steps are carried out to bridge an interruption in production in the part of the installation that is downstream of the cutting-up and delivering device ( | 03-10-2011 |
20110106289 | METHOD FOR MONITORING AN INDUSTRIAL PLANT - A method for monitoring plants, in particular complex plants in the iron and steel industry, having the steps of recording at least two channels of measurement data of a plant, if appropriate storing the measurement data, defining a target channel from the measurement data, preprocessing the measurement data, preparing at least one model of the target channel on the basis of the measurement data, and using the model thus generated and currently determined measurement data to detect fault conditions of the plant. This is to monitor industrial plants to improve the quality of the recorded measurement data of the plant, and reduce the volume of the measurement data, without a significant loss of information. Preprocessing the measurement data are subjected to the method steps of 1) detecting and eliminating “zero channels”, 2) detecting and eliminating outliers, 3) filtering, and 4) downsampling. | 05-05-2011 |
20110120202 | METHOD AND APPARATUS FOR SUPPRESSION OF OSCILLATIONS IN A ROLLING INSTALLATION - A method and an apparatus for suppression of oscillations in a rolling installation is described. By means of a hydraulic roller engagement third-octave oscillations are effectively suppressed, thus making it possible to improve the quality of the rolled material and/or the productivity of the rolling installation. A manipulated variable is supplied to an electrohydraulic actuating element that acts on at least one hydraulic actuator for the roller engagement and has a rated flow rate of ≧50 l/min. At least a portion of the frequency response at frequencies f≧80 Hz has a magnitude drop of ≦3 dB, and the phase lag φ in this frequency range satisfies the conditions f≧19·{square root over (φ)}+3.1·10 | 05-26-2011 |
20120291248 | PROCESS AND APPARATUS FOR A COMBINED CASTING AND ROLLING INSTALLATION - An apparatus for producing hot-rolled products in a combined casting-rolling installation when there is a planned or unplanned interruption to production. This can bridge an interruption in production downstream of the cutting-up and delivering device ( | 11-22-2012 |
20120305212 | PROCESS AND DEVICE FOR PRODUCING HOT-ROLLED STRIP FROM SILICON STEEL - A method and a combined casting/rolling installation for production/processing of high-quality hot-rolled strip into grain-oriented electrical steel strip at low cost, provides for: a) melting a steel having a chemical composition in wt % of Si 2 to 7%, C 0.01 to 0.1%, Mn<0.3%, Cu 0.1 to 0.7%, Sn<0.2%, S<0.05%, Al<0.09%, Cr<0.3%, N<0.02%, P<0.1%, remainder Fe and impurities; b) casting a strand having a thickness of 25 to 150 mm on a continuous casting installation; c) rolling into a strip in up to 4 rolling passes directly after casting the strand, wherein at least in one rolling pass a true strain is >30% or the total true strain of all passes is >50%; d) heating the strip to a final temperature of 1050 to 1250° C., preferably 1100 to 1180° C.; e) finish rolling the strip in a second rolling train, then f) cooling and winding the strip. | 12-06-2012 |
20130186588 | Energy and Yield-Optimized Method and Plant for Producing Hot Steel Strip - A method is disclosed for continuously or semi-continuously producing hot steel strip which, starting from a slab guided through a slab-guiding device, is rolled in, for example, an at least four-stand roughing train to form an intermediate strip and, in a further sequence in a finish rolling train, into a final strip. The thickness of a slab cast in a die is reduced in the liquid core reduction process by means of the adjoining slab-guiding device to between 85 and 120 mm, a slab support length measured between the meniscus, i.e., the bath level, of the die and an end of the slab-guiding device facing the roughing train being at least 18.5 m, a casting speed ranging from 3.8 to 7 m/min, and slabs of different thicknesses being cast as a function of given casting speeds. Using the disclosed casting parameters, high-quality finishing may be provided with high production capacities. | 07-25-2013 |
20130192790 | Method and Plant for the Energy-Efficient Production of Hot Steel Strip - A method is disclosed for continuously or semi-continuously producing hot steel strip which, starting from a slab guided through a slab-guiding device, is rolled in a roughing train having at least four-stands, the method comprising: casting a slab in a die, the slab being reduced to a thickness of between 60 and 95 mm in a liquid core reduction process by the adjoining slab-guiding device, a slab support length measured between the meniscus, i.e., the bath level, of the die and an end of the slab-guiding device facing the roughing train being between 12 m and 15.5 m, and a casting speed ranging from 3.8 to 7 m/min. The disclosed combination of casting parameters may ensure that the crater tip of the slab extends to the vicinity of the end of the slab-guiding device independently of the respective maximum casting speeds which are dependent on the particular grade of material. | 08-01-2013 |
20140096578 | METHOD AND APPARATUS FOR PREPARING STEEL STOCK BEFORE HOT ROLLING - A process and an apparatus for preparing steel stock before hot rolling. The steps of preheating the stock ( | 04-10-2014 |