Abstract: A roll stand (1) for rolling flat rolling stock (2) includes an upper working roller (3) and a lower working roller (4) that form a roll gap (5) between each other. The flat rolling stock (2) runs through the roll gap (5) in a transport direction (x) during rolling of the flat rolling stock (2). An upper cooling device (8), cools the upper working roller (3) and is arranged on the outlet side of the roll stand (1). The upper cooling device (8) has an upper spray boom (17), which extends parallel to the upper working roller (3) and has a plurality of upper spray nozzles (22), which spray a liquid coolant (12) onto the upper working roller (3). The upper cooling device (8) also has a lower spray boom (18), which extends parallel to the upper working roller (3) and has a plurality of lower spray nozzles (23), which spray the liquid coolant (12) onto the upper working roller (3). The lower spray boom (18) is arranged between the flat rolling stock (2) and the upper spray boom (17).

Abstract: There is provided a meandering control device for a rolling line capable of setting temperature of a material to be rolled so as to suppress meandering of the material to be rolled. The meandering control includes a tail end roll force calculation unit that calculates a predictive value of roll force when entry side tension is not applied, an allowable meandering amount roll force calculation unit that calculates a reference value of the roll force applied to the material to be rolled when a meandering amount of the material to be rolled is an allowable amount, and a temperature rise amount calculation unit that calculates a temperature rise amount of the material to be rolled, based on a difference between the predictive value of the roll force and the reference value of the roll force.

Abstract: A temperature control apparatus of a hot-rolling mill according to the present invention extracts a high-frequency component, a medium-frequency component, and a low-frequency component from a deviation between a calculated value or a measured value of a material temperature in a temperature managing position set on an outlet side of the hot-rolling mill and a given temperature target value. The temperature control apparatus then corrects a reference value of electric power of an induction heating device set to an electric power changing device based on the high-frequency component, corrects a reference value of a cooling water flow rate set to a flow rate changing device based on the medium-frequency component, and corrects a reference value of a roll rotation speed set to a speed changing device based on the low-frequency component.

Abstract: The invention concerns a hot-rolling mill comprising a finishing train (1) for finishing rolling stock, in particular a strip, the finishing train (1) comprising a number of rolling stands (2, 3, 4) which follow one another in a conveying direction (F) of the rolling stock. According to the invention, in order to improve the rolling force level during finishing, there is disposed at least between two rolling stands (2, 3, 4), following one another in the conveying direction (F), at least one heat-insulating element (5) by means of which the rolling stock can be protected from heat losses.

Abstract: The object is to provide a method of detecting a fault which ensures high-accuracy detection of a fault in piercing-rolling. A piercing-rolling mill (10) is provided with piercer rolls (1a, 1b), a piercer plug (3), a rolling load sensor (4), a thrust load sensor (5), and a control device (6). The control device (6) measures a rolling load parameter corresponding to the rolling load of the piercer rolls (1a, 1b) and a thrust load parameter corresponding to the thrust load of the piercer plug (3), and detects a fault in piercing-rolling on the basis of a measured value of the rolling load parameter and a measure value of the thrust load parameter.

Abstract: A coiling device (1) for coiling or uncoiling a strip (2), has at least one coiler (5), an optional drive roll (7) associated with the coiler (5), and a control device (10) for the coiler (5) and the optional drive roll (7). The control device (10) operates the coiling device (1) in such a way that a current strip temperature and/or a current microstructure property of the strip is/are determined by taking measurements or calculating a model, the control device (10) determines a current desired torque value (MH,MR) from the actual value or a variable derived therefrom, and the control device (10) operates the coiler (5) and the optional drive roll (7) by the current desired torque value (MH,MR). The coiling device (1) has the advantage of improving the coiling quality as well as the strip quality in terms of the strip thickness and width.

Abstract: In a method for cooling a hot strip wound to a hot strip bundle, a device for cooling a hot strip bundle, a control and/or regulating device, and a metal strip, the hot strip bundle (1) is twisted (100) and cooled by contact of the lateral surface (5) thereof with at least one element (3, 7). By twisting the hot strip bundle (1) about the axis of symmetry (S) thereof, a method and a device can be provided by which homogenous strip properties may be obtained for a cooling hot strip bundle in a compact manner.

Abstract: The present invention relates to the providing of a rolling mill that makes it possible to more accurately control the shape of a plate material than has hitherto been possible, and to a rolling method, and is a rolling mill that rolls a plate material using vertical work rolls, and that includes: a coolant jet spray unit that has a plurality of nozzles that are arranged at predetermined intervals in the direction of the rotation axis of the work rolls, and that sprays jets of coolant from the respective nozzles onto the work rolls; a roll temperature estimation unit that estimates a mean temperature of the work rolls; a coolant temperature detection unit that detects a temperature of the coolant; a shape detection unit that detects the shape in the width direction of the rolled plate material; a shape deviation calculation unit that calculates an amount of deviation between a plate material shape detected by the shape detection unit and a target shape; and a shape control unit that controls the shape of the

Abstract: The monitoring apparatus of production conditions in a piercing-rolling mill for piercing and rolling a billet B to produce a pipe S comprises an ultrasonic thickness meter which is installed on an exit side of the piercing-rolling mill and measures a thickness of the pipe S produced by the piercing-rolling mill, a thermometer which is installed on the exit side of the piercing-rolling mill and measures a surface temperature of the pipe S produced by the piercing-rolling mill, and a computing and displaying device which is connected to the ultrasonic thickness meter and the thermometer and displays a thickness distribution in a circumferential direction of the pipe S based on the thickness of the pipe S measured by the ultrasonic thickness meter, and a surface temperature distribution in a circumferential direction of the pipe S based on the surface temperature of the pipe S measured by the thermometer.

Abstract: A method and a device have high energy efficiency and high descaling performance, with which high-quality rolling stock can be produced. In a method in which the rolling stock is heated in an induction furnace and subsequently descaled, before the rolling stock is rolled in a rolling stand or rolling relay, the heated rolling stock is descaled by at least one rotating water jet from a rotary descaler; then at least one temperature of the descaled rolling stock is respectively recorded by a temperature measuring instrument and delivered to a controller; and the controller determines at least one control parameter with the aid of a control rule and by taking into account a setpoint temperature, and delivers it to a control component, at least one inductor of the induction furnace being driven so that the temperature of the descaled rolling stock corresponds as far as possible to the setpoint temperature.

Abstract: A method for drying a strip (3) or sheet metal that runs through a rolling mill is characterized in that the strip (3) or the sheet metal is cooled to a lower temperature in a cooling section by means of a coolant, in particular a cooling liquid, down-stream of a hot strip mill (1) or, in case of sheet metal, after passing through at least one roll stand (2), and in that the coolant, in particular the cooling liquid, and subsequently the moisture remaining on the strip (3) or the sheet metal is removed from the strip (3) or sheet metal by means of a drying apparatus (10).

Abstract: A low specific gravity and high strength steel sheet includes C of 0.2% to 0.8%, Mn of 2% to 10%, P of 0.02% or less, S of 0.015% or less, Al of 3% to 15%, and N of 0.01% or less. A ratio of Mn/Al is 0.4 to 1.0. Retained austenite in a structure is included in the range of 1% or more. The steel sheet further includes one or two or more elements selected from the group consisting of Si of 0.1% to 2.0%, Cr of 0.1% to 0.3%, Mo of 0.05% to 0.5%, Ni of 0.1% to 2.0%, Cu of 0.1% to 1.0%, B of 0.0005% to 0.003%, Ti of 0.01% to 0.2%, Zr of 0.005% to 0.2%, Nb of 0.005% to 0.2%, W of 0.1% to 1.0%, Sb of 0.005% to 0.2%, and Ca of 0.001% to 0.2%.

Abstract: According to a method, initial temperatures (T1) of strip points (101) are detected when the hot-rolled strip (6) is fed to the production line. The strip points (101) are monitored on their way through the production line. The hot-rolled strip (6) is subjected to temperature influences (delta T) in the production line (3). The strip points (101), the initial temperatures (T1), the monitored values (W(t)) and the temperature influences (delta T) are supplied to a model (9) for the production line (3). The model (9) determines expected actual temperatures (T2) of the strip points (101) in real time and allocates them to the strip points as the new actual temperatures (T2).

Abstract: The present invention provides a method to control the flatness of a metal sheet or plate by effectively preventing waviness from occurring at the edge portions of the sheet or plate when it is cooled to the room temperature after completing hot rolling, and an apparatus to carry out the method: and relates to a method to control the flatness of a metal sheet or plate by homogenizing the surface temperature distribution of the metal sheet or plate through; measuring the surface temperatures of the metal sheet or plate at the edge portions and the center portion across its width between two rolling stands of a tandem finishing mill, or at the entry to and/or the exit from a reversing finishing mill, or after completing hot rolling, or after hot leveling; controlling the heating temperatures of the edge portions and/or the center portion based on the measured surface temperatures; and then cooling the metal sheet or plate after completing the finishing rolling.

Abstract: A method for the flexible rolling of a metallic band wherein, during the rolling procedure, the metallic strip is lead through a roll gap which is formed between two working rolls and which is set so that, over the length of the metallic strip, strip sections are obtained with different strip thickness. In order to prevent temperature-related deviations in the thickness and length profiles of the metallic strip, a compensation of the temperature influence effecting the metallic strip is carried out during rolling in order to prevent deviations from the theoretical thickness and/or the theoretical length of the individual strip sections at a default temperature of the metallic strip.

Abstract: Inter-rolling stand cooling devices are provided.