Abstract:
A method for producing a metal strip, in which the strip is rolled in a multi-stand rolling mill, is removed behind the final rolling stand of the rolling mill in the direction of conveyance, and is cooled in a cooling device. The strip or metal sheet is subjected to additional rapid cooling immediately after passing the working rollers of the final rolling stand, wherein the strip or the metal sheet is cooled at least partially within the extent of the final rolling stand in the direction of conveyance, wherein rapid cooling is performed by applying a coolant to the strip or metal sheet from above and from below, wherein the volume flow of coolant that is applied to the strip or metal sheet from below measures at least 120% of the volume flow of coolant that is applied to the strip or metal sheet from above.
Abstract:
In a rolling process for reverse thermomechanically rolling an aluminum plate involving a plurality of rolling passes, identifying data are determined for thermally guiding the rolling process. Then a value of a state variable, from which a temperature of the aluminum plate can be deduced, is continuously measured and a pass schedule is determined for the rolling process on the basis of the value of the measured state variable and of the identifying data. The pass schedule provides for a rolling pause between at least two successive rolling passes, during which rolling of the aluminum plate is interrupted for cooling purposes.
Abstract:
The invention relates to a method for producing a coated steel strip for producing tailored blanks suitable for thermomechanical shaping. The method includes the following steps: providing a hot-rolled steel strip; coating the strip with a metallic coating; cold rolling the strip such that the strip obtains a variable thickness in its length direction, having at least thicker sections and thinner sections, such that tailor rolled blanks (TRBs) can be cut from this strip. The invention also relates to a steel strip thus produced and the use of such a steel strip.
Abstract:
A method of operating a mill for wire or fine sections in which control of the rolling gap is limited only to selected stands of a multiple stand intermediate line of the mill for changeover of the product to be rolled, for example, as the composition or diameter.
Abstract:
A roll stand arrangement for a single wire rolling mill train, and including arranged along a main pitch line, a multi-stand finishing block, a multi-stand post finishing block located downstream of the finishing block, and a pitch line change-over unit arranged between the finishing block and the post finishing block for advancing a wire strand from the finishing block to the post finishing block directly or through a looping pitch line in which there are provided a cooling zone, a wire looper, and a looping table.
Abstract:
A hot strip mill having a final reducing stand and runout cooling means downstream of the reducing stand includes an incubator capable of coiling and decoiling the hot strip. The incubator is located intermediate the runout cooling means. In a preferred form the final reducing stand is a hot reversing mill. A second incubator and/or a temper mill and/or a slitter may be positioned downstream of the first incubator. The method of rolling includes isothermally treating the strip within a predetermined time and temperature range in the incubator prior to subsequent processing. The subsequent processing may include any one or more of the following: further deformation by cold rolling, temper rolling or cooling at a desired heat loss rate.
Abstract:
Das Verfahren betrifft eine Anlage (11) zum Herstellen warmgewalzter Bänder aus Metall, vorzugsweise Stahl, gemäß dem CSP-Anlagenkonzept, umfassend wenigstens zwei Gießmaschinen (12a, 12b) zum Gießen von Dünnbrammen (i, i+1) mit einer Dicke von
Abstract:
A titanium alloy contains niobium from 8 to 18% by weight; zirconium from 2 to 15% by weight; tin from 0 to 8% by weight; yttrium from 0.0 to 0.3% by weight, and a balance essentially titanium. The titanium alloy has a low Young's modulus, high yield strength, excellent cold bending properties, and good cold stamping and forming performance.
Abstract:
Die Erfindung betrifft eine Vorrichtung zum Reibverschweißen warmer metallischer Produkte wie Bänder und/oder Brammen, insbesondere Dünnbrammen, umfassend eine Fördereinrichtung für mindestens zwei hintereinander angeordnete Bänder und/oder Brammen (i, i+1) und eine Andrückvorrichtung zum Andrücken des Kopfes des nacheilenden Bandes und/oder der Bramme (i+1) an das Ende des voreilenden Bandes und/oder der Bramme (i), dadurch gekennzeichnet, dass die Andrückvorrichtung ein Losteil (L) und ein Festteil (F) oder zwei Losteile (L) aufweisen und zum Fixieren der Kontaktflächen der Bänder und/oder Brammen (i, i+1) zueinander dient, wobei das Losteil (L) gegenüber dem Festteil (F) oder zwei Losteile (L) gegeneinander so in Vibration versetzt werden können, dass die zwei hintereinander angeordneten Bänder und/oder Brammen (i, i+1) miteinander unter Einfluss der Reibenergie zwischen den Kontaktflächen und unter aufgebrachten definierten Druck verschweißbar sind. Des Weiteren betrifft die Erfindung ein Verfahren zum Reibverschweißen warmer metallischer Produkte wie Bänder und/oder Brammen, insbesondere Dünnbrammen, umfassend die Schritte des Förderns von zwei hintereinander angeordneten Bändern und/oder Brammen (i, i+1) zu einer Andrückvorrichtung, Entzunderns zumindest der Kontaktflächen der miteinander zu verbindenden Bänder und/oder Brammen (i, i+1), Andrückens des Kopfes des nacheilenden Bandes und/oder der Bramme (i+1) an das Ende des vorauseilenden Bandes und/oder der Bramme (i), sowie des relativen Bewegens der Kontaktflächen zueinander mit vorab festgelegter Schwingungsfrequenz und -amplitude sowie unter vorab festgelegtem Druck oder/und zeitlich variablem Druckverlauf zum Aufbringen der Reibenergie, Fixierens der Kontaktflächen der Bänder und/oder Brammen (i, i+1) zueinander und Aufbringen eines definierten Drucks, sodass die zwei hintereinander angeordneten Bänder und/oder Brammen (i, i+1) miteinander zwischen den Kontaktflächen reibverschweißt werden.
Abstract:
The invention relates to a method for hot-rolling a slab (1), especially a steel slab, the slab (1) being subjected to at least two shaping steps at different temperatures in a hot-rolling mill (2), the slab (1) being cooled between two such shaping steps. In order to prevent ferrite from forming too soon during the hot-rolling, the slab (1) is cooled such that the lateral end sections (3, 4) of the slab (1) are cooled with a lower cooling efficiency than a center section (5) of the slab (1). The invention further relates to a hot-rolling mill (2) for hot-rolling a slab.