Abstract: A method of rolling metal strip, and in particular steel strip, in which the metal strip passes through the roll gap of at least one roll stand, allows the work rolls of the roll stand which define the roll gap to be able to be shifted along their axes of rotation if differences occur in the shape of the roll gap from its desired shape. The method provides for flat products to be rolled which meet very stringent requirements in respect of their dimensional accuracy. For this purpose, the work rolls are shifted in the same direction in accordance with the invention, following a given shift strategy which is characterized by a regular change in the direction of shift (R?, R+) as a function of the reaching of given maximum shifted positions (V2, V4, V6, . . . , V28, V28, V30, V32 . . . , V53).

Abstract: A twin roll caster and a method for operating a machine of this type. The machine includes two casting rolls, that delimit a casting gap between them on its longitudinal sides; two side plates that delimit the casting gap on its narrow sides; and at least one oscillation device, which moves the side plate in an oscillating manner about an axis of oscillation, extending substantially axially parallel to the axes of rotation of the casting rolls. Oscillation device includes two actuators, which are articulatedly coupled to the one side plate and each apply a torque rotating about the axis of oscillation on the one side plate, and a control device that emits control signals, upon which the actuators, individually or together with each other, carry out adjustment movements aligned against one another or parallel to one another.

Abstract: A twin roll caster and method for producing strip cast from a molten metal using the twin roll caster. The twin roll caster has casting rolls which delimit a casting gap between them on its longitudinal sides and narrow sides sealed in each case by a side plate which is moved during the casting operation about an axis of oscillation in an oscillating manner. The inventive method and the twin roll caster enable the risk of operational disruptions from molten mass solidifying in the region of the side plate to be further minimized. This is achieved by changing the position of the axis of oscillation during the casting operation.

Abstract: A twin roll caster and a method for operating comprising two casting rolls that delimit a casting gap on its longitudinal sides; two side plates that delimit the casting gap on its narrow sides; and at least one axial actuator associated with one of the side plates and impacting the respective side plate on its rear turned away from the front sides of the casting rolls with a force axially aligned toward the casting gap pressing the side plate against the front sides of the casting rolls. An axial actuator acts on the rear side of the side plate by means of a joint provided to adjust an angular offset between the normal level relative to the effective direction of the force applied by the axial actuator to the side plate and the normal level relative to the axes of rotation of the casting rolls.

Abstract: A method for operating a two-roll casting machine for casting molten metal into cast strip, which machine has two casting rolls which are each rotatively driven in opposite directions about an axis of rotation and between them delimit a casting gap on its longitudinal sides, with side plates that can be placed on the casting rolls, which side plates seal the casting gap on its narrow sides in the casting operation, bridging the casting gap with a refractory material, wherein the side plates are moved during the casting operation in a direction which is aligned parallel to the direction of conveying in which the cast strip leaves the casting gap. With such a method the formation of grooves distorting the casting result and the casting operation can be suppressed with increased certainty and the service life of the side plates can be increased, compared to the prior art.

Abstract: A method for producing strip cast from a molten metal by means of a twin roll caster and a twin roll caster. The machine has casting rolls which delimit a casting gap between them on its longitudinal sides and narrow sides sealed in each case by a side plate which is moved during the casting operation about an axis of oscillation in an oscillating manner. The inventive method and the twin roll caster enable the risk of operational disruptions from molten mass solidifying in the region of the side plate to be further minimized. This is achieved by changing the position of the axis of oscillation during the casting operation.

Abstract: A twin roll caster and a method for operating a machine of this type. The machine comprises two casting rolls that delimit a casting gap between them on its longitudinal sides; two side plates that delimit the casting gap on its narrow sides; and at least one oscillation device, which moves the side plate in an oscillating manner about an axis of oscillation extending substantially axially parallel to the axes of rotation of the casting rolls. The degrees of freedom of the side plate movements are increased because the oscillation device comprises two actuators which are articulatedly coupled to the respective side plate and each apply a torque rotating about the respective axis of oscillation on the side plate and a control device that emits control signals, upon which the actuators individually or together with each other, carry out adjustment movements aligned against one another or parallel to one another.

Abstract: A twin roll caster and a method for operating comprising two casting rolls that delimit a casting gap on its longitudinal sides; two side plates that delimit the casting gap on its narrow sides; and at least one axial actuator associated with one of the side plates and impacting the respective side plate on its rear turned away from the front sides of the casting rolls with a force axially aligned toward the casting gap pressing the side plate against the front sides of the casting rolls. An axial actuator acts on the rear side of the side plate by means of a joint provided to adjust an angular offset between the normal level relative to the effective direction of the force applied by the axial actuator to the side plate and the normal level relative to the axes of rotation of the casting rolls.

Abstract: A method of rolling metal strip, and in particular steel strip, in which the metal strip passes through the roll gap of at least one roll stand, allows the work rolls of the roll stand which define the roll gap to be able to be shifted along their axes of rotation if differences occur in the shape of the roll gap from its desired shape. The method provides for flat products to be rolled which meet very stringent requirements in respect of their dimensional accuracy. For this purpose, the work rolls are shifted in the same direction in accordance with the invention, following a given shift strategy which is characterized by a regular change in the direction of shift (R?, R+) as a function of the reaching of given maximum shifted positions (V2, V4, V6, . . . , V28, V28, V30, V32 . . . , V53).

Abstract: A method for operating a two-roll casting machine for casting molten metal into cast strip, which machine has two casting rolls which are each rotatively driven in opposite directions about an axis of rotation and between them delimit a casting gap on its longitudinal sides, with side plates that can be placed on the casting rolls, which side plates seal the casting gap on its narrow sides in the casting operation, bridging the casting gap with a refractory material, wherein the side plates are moved during the casting operation in a direction which is aligned parallel to the direction of conveying in which the cast strip leaves the casting gap. With such a method the formation of grooves distorting the casting result and the casting operation can be suppressed with increased certainty and the service life of the side plates can be increased, compared to the prior art.

Abstract: A device and a method for casting of strips from a metal melt includes the use of two casting rollers, which delimit between them a casting gap at their longitudinal sides, and two side plates, which, arranged opposite one another, are held in contact at face sides of the casting rollers, allocated to narrow sides in each case of the casting gap. With the device and method, metallic strips can be reliably produced which have high dimensional stability even in the area of their strip edges, in that the risk of a gathering of solidified melt at the side plates in casting operation is reduced to a minimum. This is achieved by providing at least one heating device for the heating of the casting rollers in at least those sections of their face sides at which the side plate, allocated to the face side in each case, is in contact.

Abstract: A method for the production of cast steel strip in a continuous procedure includes casting a steel melt into a casting gap having longitudinal sides of which are formed by walls that move during the casting process, to form the steel strip, and holding the steel melt, which is present above the casting gap in a melt pool, under an atmosphere containing nitrogen and hydrogen. This method allows the production of high-quality steel strips having a significantly improved surface composition compared to the prior art in that the hydrogen content of the atmosphere is greater than 0 mol % to 10 mol %, and the Cr, Mo, Nb, Si, Ti, Ni, Mn, C or N contents of the cast steel melt, which are selectively present in each case for adjusting the characteristics of the steel strip, are in each case selected so that a ratio Creq/Nieq?1.7.