EP3495086B1 - Method and device for producing a tape-shaped composite material - Google Patents

Description

The invention relates to a method for the continuous production of a strip-shaped composite material according to the preamble of claims 1 and 2, and a corresponding device according to claim 22.

For the production of hot strip, a casting and rolling plant is known according to the prior art, which in the Fig. 31 is shown in a principally simplified side view. Such a casting and rolling plant comprises the following main components, viewed in the direction of transport of the cast strip: casting machine 1, roughing stand 3, heating unit 4, finishing stand 5, cooling section 6, flying shears 7, and finally a reel device 8 the roughing stand 3 and the finishing stand 5 can be arranged.

According to the state of the art, e.g. from DE 101 24 594 B4 , A method for producing a composite strip of steel by roll cladding a directly cast steel strip and the use of such a composite strip are known. In this process, a core strip is cast directly using the two-roll process and then clad with a metal cladding strip with low-corrosion to corrosion-resistant cold-rolled strip properties. This takes place in that the cladding strip is clad inline as a cold strip onto the core strip coming from the casting heat. The production speed and the resulting economic viability of this process are limited due to the casting of the core strip using the two-roll process.

A disadvantage of the technology according to DE 101 24 594 B4 consists in only a loose connection between the core strip and the cladding strip before the actual roll cladding, because these strips are introduced into the rolling mill without a connecting contact and can therefore shift relative to one another, especially at the beginning of roll cladding. The threading of the two strips into the rolling mill is therefore a source of interference. Another disadvantage of the method according to DE 101 24 594 B4 is given by changing the layer thickness (cladding strip thickness) and by adjusting the steel quality of the cladding strip. This is because these material characteristics of the cladding tape cannot be flexibly adjusted or changed during production.

Another method for producing a composite material in a rolling mill is from DE 10 2015 110 361 A1 known, in which a material composite is produced in a sequence of several steps. First of all, a first workpiece and a second workpiece are made available in the form of a provisional composite. In a subsequent step, the provisional composite is rolled to form the composite material, with a planar connection between the first workpiece and the second workpiece being produced by pre-rolling prior to rolling. A disadvantage of the method according to DE 10 2015 110 361 A1 consists in the fact that no continuous rolling process is carried out - instead, extensive, time-consuming partial work steps are required. As a result, there is no inexpensive production of clad tape. Complex quality assurance measures are also required. This includes the cleaning of the dating surface and the measure to prevent oxidation or re-oxidation of the plating surfaces, namely through the aforementioned process step of forming a provisional bond through the first and second workpiece.

Out DE 102 46 887 A1 an apparatus for producing composite material bands by using a steel band and a corresponding method are known. Here, a steel band, which serves as a carrier material, is continuously passed through an isothermal chamber, with a liquid bearing or plating material being applied to the continuous steel band within the isothermal chamber by a so-called caster. In this case, a melting limit band is placed inside the isothermal chamber at the side edges of the steel band in order to prevent the liquid cladding material from running down to the side. The melt limiting belts, which are placed on the side of the steel belt, are designed as circulating endless belts, the speed of which is adapted to a transport speed of the steel belt. In contrast, this document does not consider the processing of a steel strip in which the side edges are already crimped up before a liquid plating material is applied and corresponding lateral melting limit strips are not required for the steel strip. In any case, are in accordance with the technology DE 102 46 887 A1 For the composite material band, which is formed by solidification of the cladding material on the carrier material in the form of the steel band, no additional processing steps are provided after it leaves or exits the isothermal chamber in order to further change the connection quality of the cladding material on the steel carrier band.

Out US 2005/0269056 A1 a generic method with the features according to the preamble of claim 1 is known.

Out WO 2004/033 129 A1 a generic method with the features according to the preamble of claim 2 is known.

Out U.S. 3,620,880 A an apparatus for the continuous production of a multi-layer tape-shaped composite material is known. In one embodiment of this device, two layers of material made of metal are placed one on top of the other and then rolled together with the aid of a roll stand. With regard to a supply of the upper material layer, the situation is such that a sufficient solidification has already occurred for this, so that it can be applied from above in a desired position to the lower material layer.

DE 10 2010 026245 A1 discloses a method for producing hot strip by means of strip casting with material properties that can be adjusted via the strip cross-section. Here, two melts with different alloy compositions are placed on a circulating casting belt, whereby the degree of mixing of these two melts before solidification can be set using an electromagnetic transverse stirrer.

The invention is based on the object of making the continuous production of a metal strip in the form of a multilayer strip-shaped composite material more economical and of optimizing the connection quality of the materials or material partners used for this purpose with simple means.

This object is achieved by a method according to claim 1 and claim 2 and by a device having the features specified in claim 22. Advantageous further developments of the invention are the subject of the dependent claims.

1. (i) Bereitstellen eines kontinuierlich in einer Transportrichtung bewegten Trägermaterials, das aus einem Grundwerkstoff aus Stahl besteht und im Querschnitt eine mittige Oberfläche aufweist, die beidseitig von überhöhten Seitenrändern begrenzt ist, und
2. (ii) Aufbringen zumindest eines aus einem Plattierungswerkstoff bestehenden flüssigen Plattierungsmaterials von oben auf die Oberfläche des bewegten Trägermaterials zwischen den überhöhten Seitenrändern, wobei sich durch Erstarren des flüssigen Plattierungsmaterials auf dem Trägermaterial ein geschlossener Verbund bildet.

A method according to the invention according to the present invention is used for the continuous production of a multilayer, strip-shaped composite material, and comprises the following steps:

1. (i) providing a carrier material which is continuously moved in one transport direction and which consists of a base material made of steel and has a central surface in cross section which is delimited on both sides by raised side edges, and
2. (ii) Applying at least one liquid plating material consisting of a plating material from above onto the surface of the moving carrier material between the raised side edges, a closed composite being formed by solidification of the liquid plating material on the carrier material.

The carrier material is produced in step (i) with a first casting machine as a continuous strand of molten steel, a thin slab being formed from the strand produced with the first casting machine by solidification. Subsequently, in a step (iii), the closed composite formed from the carrier material and the cladding material solidified on it is subjected to hot rolling, so that a single strip-shaped composite material or hot strip is continuously formed by roll cladding, which consists of the base material and the cladding material.

1. (i) Bereitstellen eines kontinuierlich in einer Transportrichtung bewegten Trägermaterials, das aus einem Grundwerkstoff aus Stahl besteht, und
2. (ii) Aufbringen zumindest eines aus einem Plattierungswerkstoff bestehenden flüssigen Plattierungsmaterials von oben auf eine Oberfläche des bewegten Trägermaterials zwischen Seitenbegrenzungseinrichtungen, die an Seitenrändern des Trägermaterials formschlüssig angestellt werden, um damit eine temporäre formschlüssige Seitenkantenerhöhung an den Seitenrändern des Trägermaterials zu bilden, wobei sich durch Erstarren des flüssigen Plattierungsmaterials auf dem Trägermaterial ein geschlossener Verbund bildet.

A method according to the invention according to a further embodiment of the present invention is used for the continuous production of a metal strip in the form of a multilayer strip-shaped composite material, and comprises the following steps:

1. (i) providing a carrier material which is continuously moved in one transport direction and which consists of a base material made of steel, and
2. (ii) Applying at least one liquid plating material consisting of a plating material from above onto a surface of the moving support material between side delimitation devices which are positioned in a form-fitting manner on the side edges of the support material in order to form a temporary form-fitting side edge elevation on the side edges of the support material, whereby solidification occurs of the liquid plating material forms a closed composite on the carrier material.

The carrier material is produced in step (i) with a first casting machine as a continuous strand of molten steel, a thin slab being formed from the strand produced with the first casting machine by solidification. Subsequently, in a step (iii) for the closed composite formed from the carrier material and the cladding material solidified thereon, hot rolling is carried out, so that a single strip-shaped composite material or composite material Hot strip is produced, which consists of the base material and the cladding material.

In the same way, the invention provides a device for the continuous production of a metal strip in the form of a multilayer strip-shaped composite material. This device comprises a first casting machine with which a continuous strand is produced from a base material consisting of steel, a thin slab moving in a transport direction being formed from this strand by solidification, and at least one roll stand that is in line with the first casting machine and downstream is arranged thereof, wherein the solidified thin slab of the strand produced with the first casting machine can be hot-rolled with this roll stand. The device further comprises at least one second casting machine with which a liquid cladding material consisting of a cladding material can be applied from above onto a surface of a carrier material in the form of the solidified thin slab, the second casting machine - viewed in the transport direction of the thin slab - being arranged upstream of the roll stand is. Here, the roll stand is designed as a roll cladding device, by means of which a closed composite formed from the thin slab and the cladding material solidified on it can be hot-rolled, so that a single strip-shaped composite material is continuously formed by roll cladding, which consists of the base material and the cladding material. The first casting machine is designed as a belt casting machine with a moving conveyor belt, with at least one electromagnetic transverse stirring device being provided adjacent to the conveyor belt, with which flows can be generated in the base material consisting of liquid steel, which can be applied to the moving conveyor belt, in the transverse direction to the conveyor belt, so that this creates excessive side edges for the thin slab that is formed by the solidification of the molten steel.

• Bei einer "Dünnbramme" handelt es sich um einen gegossenen Strang aus Metall, der bereits weitgehend vollständig durcherstarrt ist, so dass ein späteres Walzen dieser Dünnbramme möglich ist, ohne dass dabei die Gefahr besteht, dass noch flüssige Anteile des Metalls aus dem Innern nach außen herausgequetscht werden. Eine solche Dünnbramme dient als Trägermaterial für ein darauf aufgebrachtes flüssiges Plattierungsmaterial, und kann als ein Endlos-Profil ausgebildet sein, das mittels der ersten Gießmaschine hergestellt bzw. gegossen wird, z.B. durch Stranggießen oder mit einer Bandgießmaschine, auch als BCT (Belt Casting Technology) - Maschine bekannt. In Entsprechung der Gießrichtung des Stranges wird die daraus durch Erstarren gebildete Dünnbramme in einer Transportrichtung bewegt.
• Das Attribut "warm", das im Zusammenhang mit dem Warmwalzen gemäß Schritt (iii) des erfindungsgemäßen Verfahrens bzw. mit der Walzplattierungseinrichtung der erfindungsgemäßen Vorrichtung genannt ist, bezieht sich auf die Temperatur der bei diesem Warmwalzen walzplattierten Materialpartner, und ist dahingehend zu verstehen, dass diese Temperatur oberhalb der Rekristallisationstemperatur der verwendeten Metallwerkstoffe (z.B. 720°C für Stahl) liegt. Jedenfalls empfiehlt sich für das Trägermaterial, welches aus einem Grundwerkstoff aus Stahl besteht, dass es vor dem Aufbringen des flüssigen Plattierungsmaterials eine Temperatur von zumindest 600 °C, vorzugsweise von zumindest 900 °C, aufweist.

In the context of the present invention, the following aspects are to be understood as follows:

• A "thin slab" is a cast strand of metal that is already largely completely solidified, so that later rolling of this thin slab is possible without the risk of still liquid parts of the metal from the inside to the outside be squeezed out. Such a thin slab serves as a carrier material for a liquid cladding material applied to it, and can be designed as an endless profile that is manufactured or cast by means of the first casting machine, e.g. by continuous casting or with a belt casting machine, also as BCT (Belt Casting Technology ) - Machine known. In correspondence with the casting direction of the strand, the thin slab formed therefrom by solidification is moved in a transport direction.
• The attribute "warm", which is mentioned in connection with the hot rolling according to step (iii) of the method according to the invention or with the roll cladding device of the device according to the invention, relates to the temperature of the material partners roll clad during this hot rolling and is to be understood as meaning that this temperature is above the recrystallization temperature of the metal materials used (e.g. 720 ° C for steel). In any case, it is recommended for the carrier material, which consists of a base material made of steel, that it has a temperature of at least 600 ° C., preferably of at least 900 ° C., before the liquid plating material is applied.

The invention is based on the essential knowledge that "cast-roll cladding" is implemented in this way, which is a combination of the individual process steps cast cladding and roll cladding, which are now carried out one after the other in a continuous process sequence on a casting and rolling plant adapted for this purpose. In detail, the application of the liquid plating material to the carrier material is always carried out continuously and from above, possibly also several times, so that with the present invention not only a two-layer Hot strip, but also such a hot strip with three or possibly even more layers can be produced. It is also pointed out that the base material from which the carrier material and the thin slab formed from it is produced is always steel (e.g. carbon steel) or stainless steel (e.g. austenitic steel, ferritic steel). The plating material that is used for the liquid plating material that is applied to the carrier material can be steel (e.g. carbon steel) or stainless steel (e.g. austenitic steel, ferritic steel), in which case the base material and the Cladding material consist of different stainless steels. As an alternative to this, it is also possible to use non-ferrous metals (for example aluminum or copper) or also nickel alloys for the cladding material.

With the present invention, a continuous process sequence is achieved with which a multi-layer hot strip or hot sheet is produced. For this purpose, at least one further casting machine (e.g. the second casting machine) can be integrated or retrofitted in an existing casting and rolling plant (e.g. a CSP plant) in front of a roughing stand group (i.e. upstream of the roughing rolling stand group, viewed in the transport direction of the cast strand and the thin slab formed by solidification) will. This casting machine fulfills the function of a melt application device for the liquid plating material, which, as explained, is applied from above onto the carrier material. Correspondingly, with a casting and rolling plant modified in this way, hot strips with at least two layers, or possibly also with more than two layers, can be produced, which are formed from the carrier material and the at least one cladding material.

A continuous supply of the carrier material (" endless operation") is ensured in an advantageous development of the invention in that the carrier material is continuously produced in step (i) as a strand of steel with a first casting machine. This strand then solidifies to form a thin slab, onto the surface of which the liquid plating material is then applied from above. The first casting machine for producing the continuous strand for the carrier material can function according to the principle of continuous casting, a mold with walls between which the base material is poured as liquid metal from above and down through an opening in the mold in a strand guide system with a Cooling leaks. In the context of the present invention, the first casting machine can be a vertical bending system (bending of the strand after it has solidified or bending of the non-solidified strand with the help of guide segments), curved continuous caster, oval continuous caster. As an alternative to this, it is also possible for the first casting machine to be designed as a belt casting machine (BCT machine) with a moving conveyor belt, with the base material in the form of molten steel being poured or applied to the conveyor belt and then solidifying to form a thin slab .

If the first casting machine is designed as a belt casting machine with a moving conveyor belt, according to an advantageous further development of the invention, the raised side edges for the thin slab can be formed in that the belt casting machine has at least one electromagnetic cross-stirring device with which a cross-flow occurs in the molten steel applied to the conveyor belt in the direction of the side edges, ie a flow is generated in the transverse direction to the conveyor belt. This transverse flow in the direction of the side edges influences the solidification contour of the steel melt, as a result of which the elevated side edges of the thin slab formed by solidification are achieved.

In connection with the application of a liquid plating material to a surface of the carrier material in the form of the thin slab, it can be provided in the method according to the invention that the side delimitation devices, which are positioned positively against the side edges of the thin slab, have circumferential side belts that are guided around rotating guide rollers. The speed of these guide rollers is expediently synchronized with the process or transport speed for the thin slab, so that there is no relative movement between, on the one hand, the thin slab and the cladding material applied to it and, on the other hand, the engaged side bands. As an alternative to this, provision can also be made for the side delimitation devices to have guide rulers which, in the same way, are positioned laterally against the side edges of the thin slab. In any case, the adjustment of the side belts or guide rulers to the side edges of the thin slab is carried out by means of suitable adjusting devices, e.g. hydraulic cylinders or electric motor drives.

In an advantageous further development of the invention, the amount of the liquid plating material that is applied to the carrier material from above with the second casting machine can be adjusted or regulated. This allows the desired plating height to be set. The carrier material in the form of the thin slab moving through or moving in the direction of transport then appropriately absorbs the liquid cladding material in the continuous through-flow process. Appropriately, the band width of the carrier material, the band speed and the camber of the edge, which is ensured with the side limiting devices, can be used as variable process parameters, depending on which the amount of the liquid plating material applied to the carrier material is adjusted or regulated. In detail, the plating height for the applied liquid plating material can be adjusted via the set quantity regulation up to the upper limit of the raised edge.

The quality of a connection of at least two material partners (carrier material, and at least one cladding material), from which the desired strip-shaped composite material is continuously produced, can be further improved by the fact that the closed composite, which is formed in the course of step (ii) by solidification of the Plating material forms on the carrier material, is guided in a protective gas atmosphere or within a closed inertisable limited space. For this purpose, a protective gas device is provided which is either part of the second casting machine and / or - viewed in the direction of transport of the thin slab - is arranged downstream of the second casting machine. If the base material and / or the cladding material consist of steel or a steel alloy, this at least reduces or even eliminates the formation of scale, and in this respect the quality of the connection between the carrier material and the cladding material is improved. In addition and / or alternatively, it can be provided that a protective gas device is provided between the first and second casting machine, the carrier material then already before the application of the liquid plating material - thanks to the protective gas device - in an inert environment in the transport direction, namely is moved in the direction of the second casting machine. This prevents re-oxidation or scaling on the surface of the carrier material or the thin slab. It can also be provided that a cleaning device (e.g. mechanical cleaning or descaling with high-pressure water) is accommodated within the last-mentioned protective gas device.

In an advantageous further development of the invention - viewed in the transport direction of the thin slab - a solidification section is provided downstream of the second casting machine. The length of this solidification path is expediently adapted to the transport speed of the thin slab and preferably corresponds to the longitudinal extent of the aforementioned protective gas device. This ensures that the composite formed from the carrier material in the form of the thin slab and the cladding material applied thereon is guided within the protective gas device at least until the cladding material has completely solidified on the surface of the thin slab.

The connection of the individual material partners (carrier material and at least one plating material) when applying the liquid plating material to the carrier material according to step (ii) is optimized if the carrier material is suitably heated again before step (ii), e.g. to a temperature of 900 ° C. This improves the formation of a closed composite formed from the carrier material and the plating material solidified on it, which is achieved by fusing, partial fusing, adhesion or a complete application of the plating material with or on the surface of the carrier material in the form of the thin slab. In addition and / or alternatively, it can be provided that the surface of the thin slab is cleaned before step (ii), preferably by a mechanical cleaning device, e.g. by blasting, brushing, grinding, planing, milling or the like. For example, rotating brushes can be provided for cleaning the surface of the thin slab. Providing mechanical cleaning of the surface of the thin slab prior to step (ii) has the advantage over e.g.

The roll cladding of the individual material partners (carrier material and at least one cladding material) by means of hot rolling in step (iii) or by the roll cladding device is optimized in that the closed composite is formed from the carrier material and the cladding material solidified on it before step (iii), that is, upstream of the roll cladding device, is heated again in a targeted manner. For this purpose, inductive heating, electrical heating or thermal heating can be provided, with which the closed composite is brought into interaction or passed through.

In an advantageous development of the invention it can be provided that a multiple layering of cladding material is carried out on the carrier material in the form of the thin slab. For this purpose, a further liquid plating material consisting of a plating material is then applied to the closed composite, which has formed from the plating material that has already solidified thereon. As a result, a multilayer, strip-shaped composite material with at least three layers is continuously produced. This means that the further liquid plating material is applied from above onto the plating material which has already solidified beforehand. If the further cladding material is applied to the previously formed closed composite upstream of the roll cladding device, the first pass or roll cladding according to step (iii) of the method according to the invention can be carried out for or with a total of three layers consisting of the carrier material in the form of the thin slab and the solidified layers of the cladding material thereon.

As an alternative to this, provision can also be made for a further cladding material to be applied to the continuously produced strip-shaped composite material from above only after the first pass according to step (iii) or downstream of the roll cladding device. This means that steps (ii) and (iii) of the method according to the invention are then carried out repeatedly for the carrier material moved in the transport direction, preferably - as explained - within a protective gas atmosphere, with a closed composite consisting of the first Carrying out step (iii) has formed the composite material produced and the further plating material then applied thereon, is then roll-clad into a single strip-shaped composite material with three layers in the repeated carrying out of step (iii).

In an advantageous further development of the invention, it can be provided that the continuously produced strip-shaped composite material is severed or separated after step (iii) or downstream of a roll cladding device which directly adjoins the merging device. Accordingly, the multi-layer strip produced can then be processed in further process steps, e.g. trimming the strip edges, cold rolling, hot-dip galvanizing, coating. In this context, it should be noted that a furnace or heating device can be arranged in the function of a holding furnace, e.g. between the roughing train or the roll cladding device and the finishing train, in order to enable batch operation if necessary. This is advantageous in the event that a decoupling of the casting speed from the speed at which the composite material produced is processed, e.g. in the finishing train, is desired. A severing of the composite material produced by means of a severing device between the roughing train and the finishing train makes this possible.

• Flexible Erzeugung eines mehrschichtigen Verbundmaterials;
• Energetisch günstiges Produktionsverfahren;
• Hohe Produktionsflexibilität;
• Höhere Produktionsleistung und verbesserte Wirtschaftlichkeit, auf Grundlage eines möglichen Endless-Betriebs und einer Reduzierung von vorzubereitenden Materialien;
• Herstellbarkeit von Stahl- bzw. Warmbändern in unterschiedlicher Güten und Abmessungen;
• Erweiterung der zu produzierenden Stahlsorten bzw. Warmbänder, und
• Nachträgliche Integration/Modernisierung in eine(r) bereits bestehende CSP-Anlage (oder ein anderes kontinuierliches Inline-Verfahren zur Band-/Blecherzeugung) möglich.

Further advantages of the present invention consist of the following aspects:

• Flexible production of a multilayer composite material;
• Energy-efficient production process;
• High production flexibility;
• Higher production output and improved economic efficiency, based on a possible endless operation and a reduction in the materials to be prepared;
• Manufacture of steel or hot strip in different grades and dimensions;
• Expansion of the steel grades or hot strip to be produced, and
• Subsequent integration / modernization in an already existing CSP system (or another continuous inline process for strip / sheet production) possible.

Fig. 1

eine prinzipielle Seitenansicht einer Vorrichtung, die als solche nicht Teil der vorliegenden Erfindung ist, jedoch zur Durchführung eines erfindungsgemäßen Verfahrens geeignet ist,

Fig. 2

eine prinzipielle Seitenansicht einer Vorrichtung nach einer weiteren Ausführungsform, die als solche nicht Teil der vorliegenden Erfindung ist, jedoch zur Durchführung eines erfindungsgemäßen Verfahrens geeignet ist,

Fig. 3

eine vergrößerte prinzipielle Seitenansicht eines Teils der Vorrichtung von Fig. 1 bzw. Fig. 2, mit einem Stauchwalzgerüst und einer daran stromabwärts hiervon angeordneten Gießmaschine, die jeweils Bestandteil der Vorrichtung sind,

Fig. 4

eine Draufsicht auf die in Fig. 3 gezeigten Komponenten,

Fig. 5

eine Querschnittsansicht eines Trägermaterials, das mit der Vorrichtung von Fig. 1 bzw. Fig. 2 verarbeitet wird,

Fig. 6

eine Querschnittsansicht des Trägermaterials von Fig. 5, mit überhöhten Seitenrändern,

Fig. 7

eine Querschnittsansicht des Trägermaterials von Fig. 6, in Kontakt mit Stauchwalzen eines Stauchwalzgerüsts von Fig. 3 bzw. Fig. 4,

Fig. 8

Querschnittsansichten des Trägermaterials von Fig. 5 nach bzw. vor dem plastischen Stauchen von dessen Seitenrändern,

Fig. 9

eine prinzipielle Seitenansicht eines Teils der Vorrichtung von Fig. 1 bzw. Fig. 2,

Fig. 9a-9c

Querschnittsansichten des Trägermaterials, zu verschiedenen Zeitpunkten bei der Bearbeitung gemäß Fig. 9,

Fig. 10

eine prinzipielle Seitenansicht einer Vorrichtung nach einer weiteren Ausführungsform, die als solche nicht Teil der vorliegenden Erfindung ist, jedoch zur Durchführung eines erfindungsgemäßen Verfahrens geeignet ist,

Fig. 11

eine prinzipielle Seitenansicht einer Vorrichtung nach einer weiteren Ausführungsform, die als solche nicht Teil der vorliegenden Erfindung

Fig. 12

ist, jedoch zur Durchführung eines erfindungsgemäßen Verfahrens geeignet ist, eine prinzipielle Seitenansicht einer erfindungsgemäßen Vorrichtung,

Fig. 13

eine vergrößerte prinzipielle Seitenansicht eines Teils der Vorrichtung von Fig. 12,

Fig. 14

eine Draufsicht auf die in Fig. 13 gezeigten Komponenten,

Fig. 15-17

Querschnittsansichten eines Trägermaterials, das mit der Vorrichtung von Fig. 12 verarbeitet wird,

Fig. 18

eine nochmals vergrößerte Querschnittsansicht des Trägermaterials von Fig. 16 bzw. 17,

Fig. 19

eine vergrößerte prinzipielle Seitenansicht eines weiteren Teils der Vorrichtung von Fig. 12,

Fig. 19a-19c

Querschnittsansichten des Trägermaterials, zu verschiedenen Zeitpunkten bei der Bearbeitung gemäß Fig. 19,

Fig. 20

eine prinzipielle Seitenansicht einer Vorrichtung nach einer weiteren Ausführungsform der Erfindung,

Fig. 21

eine prinzipielle Seitenansicht einer Vorrichtung nach einer weiteren Ausführungsform, die als solche nicht Teil der vorliegenden Erfindung ist, jedoch zur Durchführung eines erfindungsgemäßen Verfahrens geeignet ist,

Fig. 22

eine vergrößerte prinzipielle Seitenansicht eines Teils der Vorrichtung von Fig. 21, mit einer zweiten Gießmaschine, die Bestandteil der Vorrichtung ist,

Fig. 23

eine Draufsicht auf die in Fig. 22 gezeigten Komponenten der Vorrichtung,

Fig. 24-28

jeweils Querschnittsansichten eines Trägermaterials, das mit der Vorrichtung von Fig. 21 verarbeitet wird,

Fig. 29

eine prinzipielle Seitenansicht einer Vorrichtung nach einer weiteren Ausführungsform, die als solche nicht Teil der vorliegenden Erfindung ist, jedoch zur Durchführung eines erfindungsgemäßen Verfahrens geeignet ist, und

Fig. 30

eine prinzipielle Seitenansicht einer Vorrichtung nach einer weiteren Ausführungsform, die als solche nicht Teil der vorliegenden Erfindung ist, jedoch zur Durchführung eines erfindungsgemäßen Verfahrens geeignet ist.

Preferred exemplary embodiments of the invention are described in detail below with the aid of a schematically simplified drawing. Show it:

Fig. 1

a basic side view of a device which as such is not part of the present invention, but is suitable for carrying out a method according to the invention,

Fig. 2

a basic side view of a device according to a further embodiment, which as such is not part of the present invention, but is suitable for carrying out a method according to the invention,

Fig. 3

an enlarged principle side view of part of the device from FIG Fig. 1 or. Fig. 2 , with an upsetting roll stand and a casting machine arranged downstream thereof, which are each part of the device,

Fig. 4

a top view of the in Fig. 3 shown components,

Fig. 5

FIG. 3 is a cross-sectional view of a substrate that can be used with the device of FIG Fig. 1 or. Fig. 2 is processed,

Fig. 6

a cross-sectional view of the substrate of FIG Fig. 5 , with raised margins,

Fig. 7

a cross-sectional view of the substrate of FIG Fig. 6 , in contact with edging rolls of an edging stand of Fig. 3 or. Fig. 4 ,

Fig. 8

Cross-sectional views of the substrate of FIG Fig. 5 after or before the plastic upsetting of its side edges,

Fig. 9

a principle side view of part of the device from FIG Fig. 1 or. Fig. 2 ,

Figures 9a-9c

Cross-sectional views of the carrier material at different times during processing according to FIG Fig. 9 ,

Fig. 10

a basic side view of a device according to a further embodiment, which as such is not part of the present invention, but is suitable for carrying out a method according to the invention,

Fig. 11

a principle side view of a device according to a further embodiment, which as such is not part of the present invention

Fig. 12

is, but is suitable for carrying out a method according to the invention, a basic side view of a device according to the invention,

Fig. 13

an enlarged principle side view of part of the device from FIG Fig. 12 ,

Fig. 14

a top view of the in Fig. 13 shown components,

Fig. 15-17

Cross-sectional views of a substrate made with the device of FIG Fig. 12 is processed,

Fig. 18

a further enlarged cross-sectional view of the carrier material from FIG Fig. 16 or 17,

Fig. 19

an enlarged basic side view of a further part of the device from FIG Fig. 12 ,

Figures 19a-19c

Cross-sectional views of the carrier material at different times during processing according to FIG Fig. 19 ,

Fig. 20

a basic side view of a device according to a further embodiment of the invention,

Fig. 21

a basic side view of a device according to a further embodiment, which as such is not part of the present invention, but is suitable for carrying out a method according to the invention,

Fig. 22

an enlarged principle side view of part of the device from FIG Fig. 21 , with a second casting machine that is part of the device,

Fig. 23

a top view of the in Fig. 22 shown components of the device,

Fig. 24-28

each cross-sectional views of a carrier material that is produced with the device of Fig. 21 is processed,

Fig. 29

a basic side view of a device according to a further embodiment, which as such is not part of the present invention, but is suitable for carrying out a method according to the invention, and

Fig. 30

a basic side view of a device according to a further embodiment, which as such is not part of the present invention, but is suitable for carrying out a method according to the invention.

With reference to the Figures 1 to 30 preferred embodiments of a device 10 according to the invention and components thereof are explained, this device 10 serving for the continuous production of a metal strip in the form of a multilayer strip-shaped composite material 11. As already explained above, a device as such according to FIG Fig. 1-11 and according to the Fig. 21-30 not part of the present invention, but is suitable for carrying out a method according to the present invention. The same features in the drawing are each provided with the same reference symbols. At this point it is pointed out separately that the drawing is only shown in a simplified manner and, in particular, without a scale.

The embodiments of the device 10 according to the invention are divided into three concepts, namely concept I ( Fig. 1-11 ), Concept II ( Fig. 12-20 ) and Concept III ( Fig. 21-30 ).

In the Fig. 1 a basically simplified side view of the device 10 according to a first embodiment of the first concept I is shown.

The device 10 comprises a first casting machine 12 with a mold 14. With the casting machine 12, liquid metal (steel) - as the base material - is poured in from above between the walls of the mold 14, the base material then being fed through an opening in the mold 14 as a continuous strand 13 exits into a strand guide system 15 with cooling. As a result of solidification, a thin slab 16 is then formed from the strand 13, which is moved or transported in a transport direction T (in the image area from left to right) over a roller table guide of the device 10. The device 10 further comprises a second casting machine 20 and - in Fig. 1 indicated symbolically by dashed lines - a protective gas device 26 which is part of the second casting machine 20 or - in the transport direction T seen - is arranged downstream thereof. Following the second casting machine 20, a solidification section E is provided, the length of which can coincide with a longitudinal extension of the protective gas device 26 along the transport direction T.

Following the second casting machine 20 or downstream thereof, the device 10 initially comprises a heating device 27, which can be designed as induction heating, and then at least one roll stand in the form of a roll cladding device 22.1, which is part of a roughing train 23. The reference symbol “22.i” indicates that the roughing train 23 can include further roll cladding devices. In the Fig. 1 The number of two roll cladding devices shown for the roughing train 23 is only to be understood as an example. Following the roughing train 23, the device 10 comprises a finishing train 24, the number of the four rolling stands shown here likewise being to be understood only as an example and also being larger or smaller than four.

A cooling section 36 is then provided downstream of the finishing rolling train 24, followed by a pair of shears 37, and finally a reel device 38 for winding up a continuous strip-shaped composite material 11 produced with the device 10.

Between the strand guide system 15 and the second casting machine 20, there may be a descaling device 29 (for cleaning the thin slab 16 which has formed from the continuous strand 13 through solidification), a further heating device 27 (e.g. inductive or thermal) and a further cleaning device 28 arranged. The cleaning device 28 preferably functions purely mechanically and is designed, for example, in the form of rotating brushes.

In order to eliminate possible disturbances in the casting process, the device 10 can have separating devices 35 (e.g. in the form of drum shears), e.g. between the roughing train 23 and the finishing train 24 and / or immediately following the curved strand guide system 15.

The structure of the device 10 explained above and the arrangement of its components according to the first concept I are essentially based on a conventional casting and rolling plant (cf. Fig. 31 ), and come - with the exception of the first casting machine 12 - also in the device 10 according to the second concept II (see. For example Fig. 12 ) for use. An essential feature of the present invention is that in such a conventional casting and rolling plant at least one second casting machine 20 is now integrated or supplemented, for example upstream of the roughing train 23 and its roll cladding device 22.1.

The device 10 according to the embodiment of FIG Fig. 1 comprises an upsetting roll stand 25 which - viewed in the transport direction T - is arranged upstream of the second casting machine 20. The mode of operation and the intended use of this upsetting roll stand 25 are explained separately below. Upstream of the upsetting roll stand 25, the device 10 comprises a further heating device 27, for example in the form of induction heating, and a cleaning device 28, which preferably works mechanically and is designed, for example, in the form of rotating brushes.

Fig. 2 FIG. 11 shows a basically simplified side view of the device 10 according to a second embodiment of the first concept I. In contrast to the first embodiment of FIG Fig. 1 a further heating device 27 and an in particular mechanical cleaning device 28 are arranged between the edging roll stand 25 and the second casting machine 20. The remaining system components of the device 10 in the second embodiment of FIG Fig. 2 correspond to the components of the first embodiment without change, so that the explanations should be referred to in order to avoid repetition Fig. 1 may be referred.

The invention now works as follows:
First, liquid steel, as the base material, is cast with the first casting machine 12 to form a continuous strand 13, from which, after exiting the cooled strand guide system 15, a thin slab 16 is then formed, which is placed on the roller table guide of the device 10 in the transport direction T is moved. After the strand 13 has been moved horizontally at the end of the roller table guide, the thin slab 16 formed therefrom is first cleaned with the descaling device 29, for example with water under high pressure. The thin slab 16 is then heated again with the heating device 27 and then cleaned again by the cleaning device 28, for example by using brushes which are brought into contact with the surface of the thin slab 16 from above. In any case, the use of the heating device 27 arranged upstream of the second casting machine 20 - viewed in the transport direction T - ensures that the thin slab 16, when it finally reaches the second casting machine 20 and is passed below it, has a temperature of at least 600 ° C., preferably of at least 900 ° C.

As soon as the thin slab 16 has reached the edging stand 25 (cf. Fig. 3, Fig. 4 ), the side edges 18 of the thin slab 16 come laterally into contact with the edging rolls 25s of the edging roll stand 25. The two side edges 18 of the thin slab 16 are accordingly plastically deformed and thereby increased. This change in shape for the thin slab 16 is from a comparison of the FIGS. 5 and 6 can be seen in which the thin slab 16 is shown before and after the plastic deformation of the side edges 18. In any case, it is important for the present invention that after the plastic deformation of the raised side edges 18h (cf. Fig. 6 ) in between forms a surface 17 which - seen in cross section - is laterally bounded by the two raised side edges 18h.

Fig. 7 illustrates a possible configuration of the edging roll stand 25, wherein an angle of inclination α of the longitudinal axes L of the two edging rolls 25s relative to a horizontal H can be set. As in Fig. 7 For example, shown, the edging rollers 25s are thus inclined with their longitudinal axis L inclined against the thin slab 16, so that the profiling of the elevated side edges 18 as in FIG Fig. 6 shown results.

As an alternative to the representation of Fig. 7 It can also be provided that the edging rollers 25s are conical with their outer circumferential surface, a longitudinal axis L of the edging rollers 25s running vertically. In this way, the raised side edges 18h of the thin slab 16 can also be produced, as in FIG Fig. 6 shown.

The change in shape that results for the thin slab 16 after passing through the edging stand 25 is shown in the cross-sectional view of FIG Fig. 8 illustrated again. In the upper part of the Fig. 8 the thin slab 16 is shown after the plastic deformation, the thin slab 16 in the lower part of the illustration of FIG Fig. 8 shown before upsetting. In the area of its central surface 17, the thin slab 16 has a height or thickness which is designated by "d". The plastic deformation of the side edges 18 results in an edge height k, a so-called edge elevation being determined from the difference in the distance k (between the uppermost point of the elevation to the underside of the thin slab 16, after upsetting) and the aforementioned thickness d of the thin slab 16. According to the representation in Fig. 8 The following applies here: k> d, where the edge elevation is determined by (k - d). Such elevated side edges of the thin slab 16 are denoted by "18h", the location or position of an upper edge of the elevated side edges 18h in FIG Fig. 8 marked with "18p".

The raised side edges 18h of the thin slab 16 can also be produced in that several upsetting roll stands 25 are provided, which - viewed in the transport direction T - are arranged one behind the other. This is in Fig. 1 , Fig. 2 , Fig. 10 and Fig. 11 for the reference numeral 25 each indicated in a symbolically simplified manner with the two rectangles which are positioned next to one another. Correspondingly, the side edges of the thin slab 16 are then plastically deformed several times by these upsetting roll stands 25 in order to achieve the desired edge elevation (kd) for the thin slab 16 at its side edges as a result.

The shape of the raised side edges 18h resulting from the plastic deformation (cf. Fig. 8 ) the thin slab 16 is now given the function of a trough for further processing within the device 10, into which a liquid plating material can be introduced, as will now be explained in detail below.

Fig. 9 FIG. 10 shows, in a fundamentally simplified manner, part of the device 10 from FIG Fig. 1 or from Fig. 2 , namely for the second casting machine 20 and the solidification section E provided downstream thereof. The second casting machine 20 comprises a quantity adjustment device 30, a pan 32 for receiving liquid cladding material consisting of a cladding material, an intermediate container 31 (tundish), and finally a melt feed system 33, which has a pouring nozzle 34 below the intermediate container 31. The functioning of such a pouring nozzle 34 is, for example, from WO 2012/016922 A1 or DE 10 2015 114 725 B3 known, and therefore not explained in detail at this point.

In Fig. 9 the protective gas device 26 is also shown symbolically simplified by a dashed line. It is important here that the protective gas device 26 forms a restricted space that can be inerted at least for the second casting machine 20 and the adjoining solidification path E, which leads to an improved connection quality between the thin slab 16 and the liquid plating material applied to it. Here, a longitudinal extension of the protective gas device 26 - viewed in the transport direction T - can coincide with the length of the solidification path E.

The hot thin slab 16 (e.g. at a temperature of 900 ° C, thanks to the heating device 27) is passed in the transport direction T below the melt feed system 33 of the second casting machine 20, and serves as a carrier material, namely in the sense that the liquid cladding material through the casting nozzle 34 is applied to the surface 17 of the thin slab 16. A lateral flowing down of the applied liquid plating material from the carrier material 16 is prevented by the raised side edges 18h. The height or the amount with which the liquid plating material Pf is applied to the central surface 17 of the thin slab 16 and thus filled into the trough is in the Fig. 8 symbolized with the plating height p shown there.

The application of the liquid plating material to the thin slab 16 at the point where the pouring nozzle 34 opens from above onto the thin slab 16 is shown in the plan view of FIG Fig. 4 indicated symbolically by an arrow "Pf". After the liquid cladding material Pf has reached the surface 17 of the thin slab 16, this cladding material solidifies, namely along the solidification path E and within the inerted space of the protective gas device 26.

In the Figures 9a-9c Various cross-sectional views of the thin slab 16 are shown. In the Figure 9a the thin slab 16 is shown at a point in time at which it arrives at the second casting machine 20. the Figure 9b shows the thin slab 16 at a point in time when liquid plating material Pf “fresh” has been applied to the central surface 17 of the thin slab 16 between the raised side edges 18h and is still liquid. Finally shows the Figure 9c the thin slab 16 at the end of the solidification section E, the cladding material now being essentially completely solidified, which is denoted by the reference symbol “Pe”. Here, the interface between the thin slab 16 and the cladding material Pe solidified thereon is designated by “K” and is symbolized by a dash-dotted line.

At the end of the solidification section E, a closed composite has formed from the carrier material in the form of the thin slab 16 and the cladding material Pe solidified on it, which is incorporated into the Figures 9 and 9c each designated by "21".

By means of the quantity setting device 30, in accordance with its name, the quantity of liquid plating material which is applied to the thin slab 16 on its surface 17 using the second casting machine 21 can be set or regulated. For this purpose, the quantity setting device 30 can have a pressure chamber with a variable vacuum setting, and / or a movable slide or stopper rod which is provided, for example, inside the intermediate container 31. Said variable vacuum setting for the quantity setting device 30 is, for example, off EP 1 428 599 A1 already known and therefore not further explained at this point.

For the further processing of the closed composite 21, which, as explained, is formed from the carrier material 16 and the plating material 18e solidified thereon, it is important that this closed composite 21 is first heated again downstream of the solidification path E by a heating device 27, and then by the roll cladding device 22.1 is hot-rolled with a first pass. As a result, a single strip-shaped composite material 11, which consists of the base material and the cladding material, is then continuously formed by roll cladding. At the end of the processing line of the device 10, this composite material 11 can then be coiled up by the reel device 38.

The following are in Fig. 10 and Fig. 11 further embodiments for a device 10 according to the first concept I according to the present invention are shown and explained, with which a multiple layering of plating material on the carrier material in the form of the thin slab 16 is possible, for the continuous production of a strip-shaped composite material 11 with a total of three (or possibly . even more) layers.

Fig. 10 FIG. 13 shows a third embodiment of the device 10, the components of which are essentially those of the first embodiment of FIG Fig. 1 so that to avoid repetition refer to the explanations Fig. 1 may be referred. In addition, for the third embodiment of Fig. 10 a further melt feed device for liquid plating material is provided, namely in the form of a third casting machine 40. In the illustration of FIG Fig. 10 is this third casting machine 40 in principle simplified within a box above the roller table guide of Fig. 1 shown. In this regard, it goes without saying that the third casting machine 40 and the other components that are contained within said box are arranged at the point of the roller table guide of the device 10, which is indicated by the arrow pointing vertically downwards and - viewed in the transport direction T. - is upstream of the roll cladding device 22.1.

In the third embodiment according to Fig. 10 the third casting machine 40 and the further components provided for this purpose (for example the protective gas device 26 and the solidification section E) correspond to the second casting machine 20 of the first and second embodiment of FIG Fig. 1 or. Fig. 2 .

The arrangement of the third molding machine 40 in the third embodiment of FIG Fig. 10 According to the first concept I, namely upstream of the roll cladding device 22.1, it is to be understood that on the closed composite 21, which has formed from the carrier material in the form of the thin slab 16 and the cladding material applied by the second casting machine 20, then before the first stitch according to step (iii) further plating material is applied from above onto the previously solidified plating material Pe. This application of further plating material takes place according to the same principle as before Fig. 9 explained. In this regard, it should be understood that the raised edge (k - d) of the raised side edges 18h of the thin slab 16 is sufficiently large so that further cladding material can be introduced there again and cannot flow away laterally from the thin slab 16. Subsequently, hot rolling in the form of a first pass is carried out with the roll cladding device 22.1 for a closed composite 41, which has formed from the thin slab 16 and the two solidified cladding materials 18e applied to it, so that a continuous strip-shaped composite material 11 is thereby also carried out a total of three layers is produced.

Fig. 11 shows a basically simplified side view of a device 10 according to a fourth embodiment according to the first concept I according to the present invention. In the box, which is positioned above the roller table guide of the device 10 for the sake of simplicity, the components for the fourth embodiment of the device 10 are shown, which in comparison, for example, with the embodiment of FIG Fig. 2 are now additionally provided. This is - in the same way as in the third embodiment of FIG Fig. 10 a third casting machine 40, in connection with a protective gas device 26 and the solidification section E provided downstream thereof. For the fourth embodiment of FIG Fig. 11 What is important is that the third casting machine 40 - viewed in the transport direction T - is arranged downstream of the roll cladding device 22.1, as indicated by the continuous arrow pointing vertically downwards. This means that further liquid cladding material Pf is now applied to a strip-shaped composite material 11, which was previously produced by the roll cladding device 22.1 has already been hot rolled or roll clad. In order to prevent the liquid plating material from flowing down from the side, which is now applied to a surface of the composite material 11 with the third casting machine 40 from above, a further upsetting roll stand 25 is arranged upstream of the third casting machine 40, with which - as in analogy to Fig. 5-7 already explained - the side edges of the composite material 11 can be plastically deformed.

Optionally, for the fourth embodiment of Fig. 11 it can be provided that between the upsetting roll stand 25 and the third casting machine 40 (see upper box in Fig. 11 ) a further heating device 27 and / or an in particular mechanical cleaning device 28 are arranged. In any case, a closed composite 21, which has formed from the composite material 11 previously produced and the further solidified cladding material 18e applied to it, is then again hot-rolled by means of a roll cladding device 22.1 arranged downstream of the third casting machine 40, so that a Composite material 11 is now produced with a total of three layers.

As evidenced by the Fig. 11 This embodiment can also be modified in such a way that the third casting machine 40 and the other components interacting therewith (see upper box) - viewed in the transport direction T - are arranged downstream of the roughing train 23.

Further embodiments of the invention according to the second concept II based on FIG Fig. 12-20 shown and explained:
Fig. 12 16 shows a basically simplified side view of the device 10 according to a first embodiment of the second concept II. With the exception of the first casting machine 12 and the upsetting roll stand 25, the arrangement of components along the roller table guide of the device 10 corresponds to the embodiment of FIG Fig. 1 so that reference may be made to this in order to avoid repetition.

In the first embodiment of the device 10 according to the second concept II, the first casting machine 12 is designed in the form of a belt casting machine 120 which has a circulating or moving conveyor belt 121. In this case, the cast steel is treated in such a way immediately after casting on the conveyor belt 121 that side edges with increased cross-section are set, and therefore an edging roll stand 25 as in FIG Fig. 1 provided is not required. For this in detail:
Fig. 13 shows the belt casting machine 120 and the adjoining circulating conveyor belt 121 in an enlarged side view, wherein Fig. 14 a top view of Fig. 13 indicates. According to the representation in Fig. 13 A total of three rollers R are provided for the conveyor belt 121, with which the conveyor belt 121 can rotate. The smaller of the two rollers shown on the left in the image area ensures that the conveyor belt 121 is evenly tensioned Fig. 13 are not shown.

A feed device 122 is arranged between the belt casting machine 120 and the beginning of the conveyor belt 121, with which liquid steel is poured or cast onto the conveyor belt 121. In the area of this feed device 122, the conveyor belt 121 is suitably cooled from below by spray nozzles (not shown for the sake of simplicity). For the further functioning of such a strip casting machine, click DE 10 2013 214 940 A1 are referred to, the disclosure of which is hereby incorporated by reference.

The representation of Fig. 13 It also makes clear that along the longitudinal extension of the conveyor belt 121 a solidification section E is provided for the steel melt poured onto the conveyor belt 121, possibly in connection with a protective gas device 126 in which the conveyor belt 121 can be accommodated.

Above the conveyor belt 121 there is at least one electromagnetic transverse stirring device 123 ( Fig. 13 ) arranged, comprising a first electromagnetic transverse stirrer 124 and a second electromagnetic transverse stirrer 125 arranged adjacent thereto ( Fig. 14 ). These transverse stirrers 124, 125 each consist of a multiplicity of coils which are arranged across the conveyor belt 121 and the molten steel cast thereon. By passing a current through the respective coils, a magnetic field is induced which serves to generate a flow within the molten steel towards the side edges, ie in the transverse direction to the conveyor belt 121.

Downstream of the two transverse stirrers 124, 125, an electromagnetic longitudinal stirrer 126 can also be arranged, which also consists of a plurality of coils. The mode of operation of this electromagnetic stirrer 12-126 and its mode of operation is, for example, from EP 2 649 407 B1 known, for the purposes of the present invention the disclosure according to EP 2 649 407 B1 is comprehensively referred to.

After the molten steel has been discharged by the feed device 122 onto the moving conveyor belt 121, the two transverse stirrers 124, 125, as explained, generate a flow within the molten steel towards the side, ie in the direction of the side edges. In other words, a surface flow is caused within the molten steel by the two transverse stirrers 124, 125 in the direction of the side edges of the conveyor belt 121 - as seen from the center of the conveyor belt. Specifically, in the molten steel 130 ( Fig. 15 ) with the first transverse stirrer 124 a - as seen in the pouring or transport direction T - generated flow to the left, with the second transverse stirrer 125 generating a flow in the opposite direction, namely to the right. The dam block chains (not shown) ensure the necessary lateral guidance and thus limit the profile width b for the poured molten steel 130 Solidification distance E (cf. Fig. 13 ).

The solidification contour of the molten steel is influenced by the cross flow generated by means of the two transverse stirrers 124, 125 within the molten steel. This means that a thin slab 16, which is formed from the molten steel by solidification, has side edges 18h that are elevated when viewed in cross section. A comparison of those in the Fig. 15-17 The cross-sectional views shown illustrate the course of the contour formation after the molten steel has been discharged onto the conveyor belt 121. Fig. 15 shows a liquid flat profile 130 before the stirring process. Fig. 16 shows the flat profile 16 after the action of the two transverse stirrers 124, 125, a thin slab 16 with raised side edges 18h being formed from the liquid steel as a result of incipient solidification. Finally, the cross-sectional view of FIG Fig. 17 the flat profile or the thin slab 16 formed from the steel melt by solidification at the end of the solidification section E (cf. Fig. 13 ), the location or position of the generated upper edges of the raised side edges 18h being provided with the reference symbol "18p".

The cross-sectional view of Fig. 17 is in the Fig. 18 shown enlarged again. It can be seen from this that with the raised side edges 18h of the thin slab 16, an edge elevation is achieved which is determined from the difference between the edge height k and the thickness or height d of the thin slab 16. This gives the thin slab - viewed across its width b or in cross section - a central surface 17 which is laterally delimited by the two raised side edges 18h.

After solidification, ie when leaving the circulating conveyor belt 121 or at the end of the associated solidification section E, the thin slab 16 has the in the Fig. 16-18 The contour shown has the function of a trough for further processing within the device 10, into which a liquid plating material can be introduced, as will now be explained in detail below.

The thin slab 16 is after it in cross section the in Fig. 18 has received the contour shown, moved on the roller table guide of the device 10 further in the transport direction T, in the direction of the second casting machine 20. Before the thin slab 16 reaches the second casting machine, it can first be cleaned by the descaling device 29, and then by the heating device 27 heated in a targeted manner and, if necessary, cleaned again by the mechanically functioning cleaning device 28.

The subsequent process, after which a liquid plating material Pf is applied to the central surface 17 of the thin slab 16 by means of the second casting machine 20, is shown in FIG Figures 19 and 19a-19c shown, and corresponds identically to the sequence that was already described above with reference to Figures 9 and 9a-9c has been explained, so that reference is made to this in order to avoid repetition. This applies in the same way to the functioning of the quantity setting device 30 of the second casting machine 20, as well as to the further processing of the closed composite 21, which is made up of the carrier material in the form of the thin slab 16 and the cladding material Pe solidified on it formed by the roll cladding device 22.1 to produce the tape-shaped multilayer composite material 11.

the Fig. 20 FIG. 11 shows a basically simplified side view of a second embodiment of the device 10 according to the second concept II. Based on the embodiment of FIG Fig. 19 are here a third casting machine 40 with further system components - in Fig. 20 shown in simplified form in a box above the roller table guide - arranged upstream of the roll cladding device 22.1, as indicated by the arrow pointing vertically downwards, which ends in front of or upstream of the roll cladding device 22.1. With the third casting machine 40 it is possible to apply further liquid plating material to the closed composite 21, which has previously formed from the carrier material 16 below solidified plating material Pe subsequent first stitch with the roll cladding device 22.1. Otherwise, this casting machine 40 is used in the same way as in the embodiment of FIG Fig. 10 according to the first concept I, so that reference is made to the explanations at the appropriate point.

Below are further embodiments of the invention according to the third concept III with reference to FIG Fig. 21-30 shown and explained:
In Fig. 21 a basically simplified side view of the device 10 for a first embodiment according to the third concept III is shown. The system components used here, which - viewed in the transport direction T - are provided following the first casting machine 12 along the roller table guide, correspond to those of the embodiment from FIG Fig. 1 , with the exception of the edging mill stand 25 (at Fig. 21 not provided) and by institutions that are now part of the Fig. 21 downstream of the second molding machine 20 for side guiding the plating liquid material Pe, as explained below.

The thin slab 16, which has formed from the molten steel by solidification, has a rectangular cross-section when it arrives at or in front of the second casting machine 20 (cf. Fig. 24 ).

the Fig. 22 FIG. 10 shows an enlarged side view of part of the device 10 of FIG Fig. 21 , namely for the second casting machine 20 and the other components that serve to guide the liquid plating material Pe and are either part of the casting machine 20 or are located downstream thereof. the Fig. 23 FIG. 11 shows a plan view of the side view of Fig. 22 Specifically - viewed in the transport direction T of the thin slab 16 - a side delimitation device S is provided up or from the level of the second casting machine 20, which has circumferential side belts 19 which are guided on rotating guide rollers F. During the movement of the thin slab 16, the side belts 19 are positioned in a form-fitting manner on their side edges 18, so that a temporary side edge elevation or edge elevation is thereby formed. Here, a length of the side belts 19 - viewed in the transport direction T of the thin slab 16 - essentially corresponds to the length of the solidification path E (see top view of FIG Fig. 23 ).

In interaction with the second casting machine 20, a protective gas device 26 is provided (in Fig. 21 and Fig. 22 symbolized only in a simplified manner by dashed lines), in which the side delimitation device S is received in connection with the circumferential side belts 19. It is important here that the protective gas device 26 forms a restricted space that can be inerted at least for the second casting machine 20 and the adjoining solidification path E, which leads to an improved connection quality between the thin slab 16 and the liquid plating material applied to it. The side delimitation device S with its circumferential side strips 19 is accommodated within the protective gas device 26, so that the application of the liquid plating material Pf and its subsequent solidification on the surface 17 of the thin slab 16 takes place accordingly in an inert environment.

In the Figures 24 to 26 the thin slab 16 is shown in each case in a cross-sectional view, a comparison of these figures making it clear how the guide rollers F, and thus the side belts 19, are attached to the side edges 18 of the thin slab ( Fig. 24 ) be employed. With regard to the section in which the circumferential side belts 19 are in contact with the side edges 18 of the thin slab 16 moving synchronously with this, the thin slab 16 now has the function of a trough for further processing within the device 10, into which a Surface 17 of the thin slab 16 (cf. Fig. 25 ) liquid plating material can be introduced or cast, which will be explained in detail below.

the Fig. 22 It also clarifies that the second casting machine 20 comprises the following additional components: a quantity adjustment device 30, a pan 32 for receiving liquid plating material consisting of a plating material, an intermediate container 31 (tundish), and finally a melt feed system 33, which is located below the intermediate container 31 Has pouring nozzle 34.

The application of liquid plating material to a surface 17 of the thin slab 16 now works as follows:
The thin slab 16 is passed in the transport direction T below the melt feed system 33 of the second casting machine 20 in the hot state, and serves here as a carrier material, namely in the sense that liquid plating material, which is formed from a plating material, through the pouring nozzle 34 onto the surface 17 of the thin slab 16 is applied. This application of the liquid plating material Pf to the surface 17 of the thin slab 16 takes place within the inerted environment of the protective gas device 26. A lateral downflow of the applied liquid plating material from the carrier material 16 is prevented by the circumferential side belts 19 (cf. Fig. 3 ) which are moved synchronously, that is, at preferably the same speed, with the thin slab 16 and are positioned in a form-fitting manner against the side edges 18 of the thin slab. The application of the liquid plating material on the hot thin slab 16 is in the plan view of FIG Fig. 23 symbolically indicated by an arrow "Pf", and is also shown in the cross-sectional view of the thin slab in FIG Fig. 26 shown when the plating material Pf is still liquid

After the liquid cladding material Pf has reached the surface 17 of the thin slab 16, this cladding material solidifies, namely along the solidification path E. This also takes place within the inerted environment of the protective gas device 26. The cross-sectional view of the thin slab 16 from FIG Fig. 27 With the designation “Pe” symbolizes the now solidified cladding material which adheres to the surface 17 of the thin slab 16 as a result of its solidification. The contact area between the thin slab 16 and the cladding material Pe solidified thereon is in FIG Fig. 27 labeled "K" and symbolized by a dash-dotted line.

The further cross-sectional view of Fig. 28 shows the thin slab 16 at a point on the roller table guide which is located downstream of the side delimitation device S and in particular also downstream of the solidification section E. Correspondingly, there are no longer any side bands at the side edges 18 of the thin slab 16, because further processing of the thin slab 16 with the cladding material Pe solidified on it can now take place without further edge guidance.

After the cladding material Pe has completely solidified on the surface 17 of the carrier material in the form of the thin slab 16, this forms a closed composite of these two materials, which is shown in the drawing (e.g. in Fig. 21 , Fig. 22 and Fig. 28 ) is marked with "21"

By means of the quantity setting device 30 (cf. Fig. 22 ) the amount of liquid plating material which is applied to the thin slab 16 on its surface 17 with the second casting machine 20 can be set or regulated - in accordance with its name. For this purpose, the quantity setting device 30 can have a pressure chamber with a variable vacuum setting, and / or a movable slide or stopper rod, which, for example, is inside the intermediate container 31 is provided. Said variable vacuum setting for the quantity setting device 30 is, for example, off EP 1 428 599 A1 already known and therefore not further explained at this point. In this regard, it goes without saying that the cladding material is only applied to the carrier material in the form of the thin slab 16 in such an amount as is possible with the raised edge realized by the side strips 19 of the side delimitation device S.

For the further processing of the closed composite 21, which, as explained, is formed from the carrier material 16 and the cladding material Pe solidified on it, it is important that this closed composite 21 is heated again downstream of the solidification section E by a heating device 27 before this composite 21 is then hot rolled by the roll cladding device 22.1 with a first pass. As a result, a single strip-shaped composite material 11, which consists of the base material and the cladding material, is continuously formed by roll cladding. The composite material 11 produced is then guided through the finishing rolling train 24 and the cooling section 36 and can be coiled up by the reel 38 at the end of the processing line.

The following are in Fig. 29 and Fig. 30 further embodiments for a device 10 according to the third concept III according to the present invention are shown and explained, with which a multiple layering of plating material on the carrier material in the form of the thin slab 16 is possible for the continuous production of a strip-shaped composite material 11 with a total of three (or possibly . even more) layers.

Fig. 29 FIG. 11 shows a second embodiment of the device 10 according to the third concept III, the components of which are essentially those of the first embodiment from FIG Fig. 21 so that to avoid repetition refer to the explanations Fig. 1 may be referred. In addition, for the second embodiment of Fig. 29 a further melt feed device for liquid plating material is provided, namely in the form of a third casting machine 40. In the illustration of FIG Fig. 29 this third casting machine 40 is simplified in principle inside a box above the roller table guide of Fig. 1 shown, in connection with further components, which are also provided in addition and interact with this third casting machine 40. In this regard, it goes without saying that the third casting machine 40 and the other components that interact with it and that are shown inside the said box are arranged at the point of the roller table guide of the device 10, which is indicated by the arrow pointing vertically downwards and - in seen in the direction of transport T - upstream of the roll cladding device 22.1.

In the second embodiment according to Fig. 29 correspond to the third casting machine 40 and the further components provided for this purpose (e.g. the protective gas device 26, the solidification section E and the side delimitation device S with the circumferential side belts 19) of the second casting machine 20 according to the first embodiment, so that to avoid repetition on the explanations to Fig. 21 may be referred.

The arrangement of the third molding machine 40 in the second embodiment of FIG Fig. 29 , namely upstream of the roll cladding device 22.1, it is to be understood that further cladding material from is applied on top of the previously solidified cladding material Pe. This application of further plating material is carried out according to the same principle as already, for example, on the basis of Fig. 23 and the Figures 26-28 explained. In this regard, it should be understood that the raised edge that is formed with the side strips 19 positioned on the side edges 18 of the thin slab 16 is sufficiently large so that this further cladding material can be introduced between them and does not flow down the side of the thin slab 16. This is followed by hot rolling in the form of a first pass according to step (iii) of the invention for a closed composite 41, which has formed from the thin slab 16 and the two solidified cladding materials Pe applied to it, with the roll cladding device 22.1 Process carried out, so that a tape-shaped composite material 11 with a total of three layers is thereby continuously produced.

Fig. 30 shows a basically simplified side view of a third embodiment for a device 10 according to the third concept III according to the present invention. In the box, which is positioned above the roller table guide of the device 10 for the sake of simplicity, the components for the third embodiment of the device 10 are shown, which in comparison to the embodiment of FIG Fig. 21 are now additionally provided. This is - in the same way as in the second embodiment of Fig. 29 A third casting machine 40, in connection with a protective gas device 26, the solidification section E provided downstream thereof and the side delimitation device S with the circumferential side belts 19, which are positioned positively on the side edges 18 of the thin slab 16.

For the third embodiment of Fig. 30 It is important that the third casting machine 40 - seen in the transport direction T - is arranged downstream of the (first) roll cladding device 22.1, and e.g. upstream of further roll cladding devices of the roughing mill train 23. This means that now further liquid cladding material Pf is applied to a strip-shaped composite material 11 is applied, which has already been hot-rolled or roll-clad previously by the roll cladding device 22.1. A lateral downward flow of the liquid plating material, which is now applied from above with the third casting machine 40 onto a surface of the composite material 11, is prevented, as already explained, by the circumferential side bands 19 that are positioned.

Optionally, for the third embodiment of Fig. 30 it can be provided that upstream of the third casting machine 40 (see upper box in Fig. 10 ) a further heating device 27 and / or an in particular mechanical cleaning device 28 are arranged. In any case, a closed composite 42 (see upper box in Fig. 30 ), which has formed from the previously produced composite material 11 and the solidified further plating material Pe applied to it, then hot rolling again by means of a downstream The roll cladding device 22.1 arranged by the third casting machine 40 is carried out, so that a composite material 11 with a total of three layers is now produced by roll cladding.

With regard to all the embodiments explained above, it should be pointed out that a protective gas device can also be provided between the first casting machine 20, 120 and the second casting machine 20. For example, the effective range of the protective gas device 26 shown in FIG Fig. 1 , Fig. 12 and Fig. 21 each shown in connection with the second casting machine 20, extend further upstream of the second casting machine 20, and thus also include, for example, the cleaning device 28 and possibly also the heating device 27. As a result, the carrier material in the form of the thin slab 16 is moved in an inert environment thanks to the protective gas device even before the application of the liquid plating material Pf, which prevents re-oxidation or the like on the surface of the thin slab 16.

With the above-explained embodiments for a device 10 according to concepts I to III, the method according to the invention for producing the continuous strip-shaped composite material 11 can be carried out. This method can be carried out automatically and preferably in a regulated manner as a function of at least one of the process variables mentioned at the outset.

The embodiments of the invention explained above have in common that a liquid cladding material is applied from above to the carrier material moved in the transport direction T (in the form of the thin slab 16 or the already roll-clad composite material 11) through the second casting machine 20 (or the third casting machine 40). is applied (= cast cladding), and then hot rolling by means of the roll cladding device 22.1 (= roll cladding) takes place directly within the same processing line of the device 10.

Finally, for the embodiments according to the first concept I, it is pointed out that the plastic deformation of the thin slab 16, which leads to its raised side edges 18h, as part of step (i) of the invention Method of claim 1 is to be understood. In the same way, it applies to the embodiments according to the third concept III that the interaction between at least the two transverse stirrers 124, 125 and the still liquid and hot molten steel 130, as a result of which the explained cross flows then arise within the molten steel 130 and for those formed by solidification as a result Thin slab 16, the raised side edges 18h are produced, can also be seen as part of step (i) of the method according to the invention of claim 1.

Claims (28)

1. Method for continuous production of a multi-layer strip-shaped composite material (11), comprising the steps of:

   (i) providing a carrier material (16), which is continuously moved in a transport direction (T) and which consists of a basic substance of steel and has in cross-section a central surface (17) bounded at both sides by elevated side edges (18h), and

   (ii) applying at least one liquid plating material (P-f), which consists of a plating substance, from above to the surface (17) of the moved carrier material (16) between the elevated side edges (18h), wherein a closed composite (20) forms by hardening of the liquid plating material on the carrier material (16),

   characterised in that

   the carrier material (16) is produced in step (i) by a first casting machine (12) as a continuous strip (13) of molten steel, wherein a thin slab (16) forms by hardening from the strip (13) produced by the first casting machine (12), and

   in a step (iii) the closed composite (20) formed from the carrier material (16) and the plating material (P-e) hardened thereon is subjected to hot rolling so that a single strip-shaped composite material (11) or hot strip consisting of the basic substance and the plating substance thereby continuously arises through roll-bonding.
2. Method for continuous production of a multi-layer strip-shaped composite material (11), comprising the steps of:

   (i) providing a carrier material (16) which is continuously moved in a transport direction (T) and consists of a basic substance of steel, and

   (ii) applying at least one liquid plating material (P-f), which consists of a plating substance, from above to a surface (17) of the moved carrier material (16) between lateral boundary devices (S) set up in interlocking manner at side edges (18) of the carrier material (16) so as to thereby form a temporary side edge elevation at the side edges (18) of the carrier material (16), wherein a closed composite (21) forms by hardening of the liquid plating material (P-f) on the carrier material (16),

   characterised in that

   the carrier material (16) is produced in step (i) by a first casting machine (12) as a continuous strip (13) of molten steel, wherein a thin slab (16) forms by hardening from the strip (13) produced by the first casting machine (12), and

   in a step (iii) the closed composite (20) formed from the carrier material (16) and the plating material (P-e) hardened thereon is subjected to hot rolling so that a single strip-shaped composite material (11) or hot strip consisting of the basic substance and the plating substance thereby continuously arises through roll-bonding.
3. Method according to claim 1 or 2, characterised in that the first casting machine (12) comprises a mould (14) with walls, between which the basic substance as liquid metal can be poured from above and issues downwardly through an opening into a strip guide system (15) with cooling.
4. Method according to claim 1 or 2, characterised in that the first casting machine (12) is constructed as a belt casting machine (120; BCT machine) with a moved transport belt (121), wherein the basic substance is spread in the form of molten steel (130) on the moved transport belt (121) and subsequently forms a thin slab (16) through hardening.
5. Method according to any one of claims 2 to 4, characterised in that the carrier material in the form of the hardened thin slab (16) is plastically deformed at both side edges (18) by contact with upsetting rolls (25s) so that the elevated side edges (18h) of the carrier material (16) are thereby formed prior to the step (ii).
6. Method according to claim 5, characterised in that an edge elevation (k-d) is produced by contact of the upsetting rolls (25s) with the side edges (18) of the carrier material (16) on the upper side (17) thereof, wherein:

   k = edge height, i.e. spacing of the uppermost point of the elevation from the from the lower side of the carrier material (16) after the upsetting and

   d = thickness of the carrier material in the form of the hardened thin slab (16) prior to the upsetting.
7. Method according to claim 5 or 6, characterised in that the upsetting rolls (25s) have a profiling by which the elevated side edges (18h) of the carrier material (16) are produced.
8. Method according to any one of claims 5 to 7, characterised in that the upsetting rolls (25s) are of cylindrical configuration, wherein an angle (α) of inclination of a longitudinal axis (L) of the upsetting rolls (25s) relative to the horizontal (H) is settable so as to produce the edge elevation (k-d).
9. Method according to claim 4 when dependent on claim 1, characterised in that the belt casting machine (120) comprises at least one electromagnetic transverse agitating device (123) by which a flow in transverse direction with respect to the moved transport belt (121) is produced in the molten steel (130) spread on the transport belt (121) so that the elevated side edges (18h) of the carrier material (16) thereby form in step (i).
10. Method according to claim 9, characterised in that the electromagnetic transverse agitating device (123) comprises a first electromagnetic transverse agitator (124) and a second electromagnetic transverse agitator (125), preferably in that the electromagnetic transverse agitators (124, 125) each comprise a plurality of coils extending transversely over the moved transport belt (121).
11. Method according to claim 9, characterised in that the belt casting machine (120) comprises at least one electromagnetic longitudinal agitating device (126) which as seen in the transport direction (T) of the carrier material (16) is arranged downstream of the transverse agitating devices (123) and directly adjacent thereto, wherein a flow in longitudinal direction with respect to the transport belt (121) is produced by the electromagnetic longitudinal agitating device (126) in the molten steel (130) spread on the moved transport belt (121).
12. Method according to any one of claims 2 to 11, characterised in that the lateral boundary devices (S) are formed as circulating side belts (19) or as straight guides.
13. Method according to any one of the preceding claims, characterised in that in step (iii) the amount of liquid plating material (P-f) is applied in dependence on at least one predetermined process parameter, particularly the transit speed, the plating width and the plating height of the continuously produced strip-shaped composite material (11), preferably in that the applied amount of the liquid plating material (P-f) is set in regulated manner in dependence on the at least one predetermined process parameter, preferably in that for application of the liquid plating material use is made of a second casting machine (21) which as seen in the transport direction (T) of the carrier material (16) is arranged downstream of the first casting machine (12).
14. Method according to any one of the preceding claims, characterised in that the carrier material (16) is heated prior to the step (ii), preferably in that the carrier material (16) is cleaned prior to the step (ii).
15. Method according to any one of the preceding claims, characterised in that the closed composite (21) formed from the carrier material (16) and the hardened plating material (P-e) is heated prior to the step (iii).
16. Method according to any one of the preceding claims, characterised in that prior to carrying out the step (iii) lateral boundary devices (S) are set up at the side edges (18) of the closed composite (21) formed from the carrier material (16) and the plating material (P-e) hardened thereon and that subsequently a further liquid plating material (P-f), which consists of a plating substance, is applied from above to a closed composite (14) formed from the carrier material (16) and the plating material (P-e), which is already hardened thereon, between the set-up lateral boundary devices (S), wherein subsequently the step (iii) for the carrier material (16) and the plating materials (P-e) hardened thereon is carried out and thus a single strip-shaped composite material (11) or hot strip with in total three layers continuously arises.
17. Method according to any one of the preceding claims, characterised in that after performance of the step (iii) for the thereby continuously produced single strip-shaped composite material (11), the steps (ii) and (iii) are repeated so that in the case of a repeated performance of the step (iii) a single strip-shaped composite material (11) or hot strip with in total three layers thereby continuously arises.
18. Method according to any one of the preceding claims, characterised in that the carrier material (16) provided in step (i) and/or the closed composite (21, 41, 42) formed in step (ii) is or are guided in a protective gas atmosphere (36) prior to performance of the step (iii).
19. Method according to any one of the preceding claims, characterised in that the basic substance consists of stainless steel.
20. Method according to any one of the preceding claims, characterised in that the plating substance for the at least one plating material consists of stainless steel, preferably in that the plating substance and the basic substance respectively consist of different stainless steels.
21. Method according to any one of the preceding claims, characterised in that the plating substance for a plating material consists of a non-ferrous metal, preferably of aluminium, copper or a nickel alloy.
22. Device (10) for continuous production of a multi-layer strip-shaped composite material (11), comprising

    a first casting machine (12) by which a continuous strip (13) of a basic substance consisting of steel is produced, wherein a thin slab (16) moved in a transport direction (T) forms from this strip (13) by hardening, and

    at least one roll stand which is arranged in line with the first casting machine (12) and downstream thereof, wherein the hardened thin slab (16) of the strip produced by the first casting machine (12) can be hot-rolled by this roll stand,

    wherein at least one second casting machine (20) is provided, by which a liquid plating material (P-f) consisting of a plating substance can be applied from above to a surface (17) of a carrier material in the form of the hardened thin slab (16), wherein the second casting machine (20) as seen in the transport direction (T) of the thin slab (16) is arranged upstream of the roll stand,

    wherein the roll stand is constructed as a roll-bonding device (22.1) by means of which a closed composite (21) formed from the thin slab (16) and the plating material (P-e) hardened thereon can be hot-rolled so that a single strip-shaped composite material (11) consisting of the basic substance and the plating substance thereby continuously arises through roll-bonding and

    wherein the first casting machine (12) is constructed as a belt casting machine (120) with a moved transport belt (121), wherein provided adjacent to the transport belt (121) is at least one electromagnetic transverse agitating device (123) by which flows in transverse direction with respect to the transport belt (121) can be generated in the basic substance consisting of liquid steel (130) which can be spread on the moved transport belt (121), so that elevated side edges (18h) thereby form for the thin slab (16) which forms through hardening of the molten steel.
23. Device (10) according to claim 22, characterised in that the transverse agitating device (123) comprises a first electromagnetic transverse agitator (124) and a second electromagnetic transverse agitator (125), wherein flows in the liquid steel (130) in respectively opposite directions transversely to the longitudinal direction of the transport belt (121) can be produced by these transverse agitators (124, 125).
24. Device (10) according to claim 23, characterised in that the first casting machine in the form of the belt casting machine (120) as seen in the transport direction (T) of the thin slab (16) has downstream of the transverse agitating device (123) an electromagnetic longitudinal agitating device (126) by which a flow in longitudinal direction with respect to the transport belt (121) can be produced in the basic substance consisting of liquid steel (130) which can be spread on the moved transport belt (121).
25. Device (10) according to any one of claims 22 to 24, characterised in that as seen in the transport direction (T) of the thin slab (16) a heating device (27) and/or a cleaning device (28, 29), by means of which the thin slab (16) formed by hardening from the strip (13) produced by the first casting machine (12) is heated or cleaned, is or are arranged upstream of the second casting machine (20).
26. Device (10) according to any one of claims 22 to 25, characterised in that a third casting machine (40) as seen in the transport direction (T) of the thin slab (16) is arranged downstream of the second casting machine (20), wherein a further liquid plating material (P-f) consisting of a plating substance can be applied by the third casting machine (40) from above to the closed composite (21) formed from the thin slab (16) and the already hardened plating material (P-e).
27. Device (10) according to any one of claims 22 to 26, characterised in that the second/third casting machine (20/40) comprises a quantity setting device (30) by means of which an amount of the liquid plating material (P-f) applied to a surface (17) of the hardened thin slab (16) is settable, preferably regulable, preferably in that the quantity setting device (30) comprises a tundish (31) which comprises a movable slider and/or a movable plug rod and/or a pressure chamber with a variable vacuum setting.
28. Device (10) according to any one of claims 22 to 27, characterised by a protective gas device (26), which is provided between the first casting machine (12, 120) and the second casting machine (20) and/or is part of the second/third casting machine (20/40) and/or as seen in the transport direction (T) of the thin slab (16) is arranged downstream of the second/third casting machine (20/40), wherein the closed composite (21, 41) formed from the carrier material in the form of a thin slab (16) and the plating material (P-e) hardened thereon is guided within this protective gas device (26) in a protective gas atmosphere.

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