EP1398099B1 - Liquid cooled continuous casting mold for casting metal strands - Google Patents

Abstract

Liquid-cooled mold comprises mold plates (1) made from copper or copper alloy joined to an adapter plate or water tank by bolts (14) fixed to a base protruding from the coolant side (6) of the mold plate. The bolts protrude into a cooling gap (5) formed between the mold plate and the adapter plate and have a structure fitting the flow direction of the coolant.

Description

The invention relates to a liquid-cooled mold with the features of Preamble of claim 1.

From DE 197 16 450 A1 are liquid-cooled molds for continuous casting of thin steel slabs are known in which two are opposite one another, respectively composed of a copper plate and a steel support plate Wide side walls are provided. The one mold cavity delimiting Copper plates are releasably fastened to the support plates by means of metal bolts. The Metal bolts are welded to the copper plates. This is additionally an Nickel ring used as welding filler. By welding the Metal stud with the copper plate is a point heat input, which at the Welding disadvantageous structural changes brings with it. Additionally is at the commonly used stud welding a review of the Welded joint required. If a metal bolt is damaged, it must consuming separated from the copper plate and a new metal bolt be replaced.

It also belongs to the prior art, threaded inserts directly into one introduce copper mold plate, so that the mold plate via bolts can be attached to an adapter plate or a water box. at However, mold plates of smaller wall thickness can be the safety distance between the bottom of the hole of the threaded bushing and the casting surface of the Below the mold plate. Usually there is a safety margin of 6 to 25 mm is required to allow reworking of the casting side.

Is the sum of the depth needed to screw in the threaded bushes and the distance required for the safe operation of the mold plates the bottom of the hole and the casting side are larger than the wall thickness of the mold plate, There remains only the possibility of other less effective forms of connection dodge.

EP 1 138 417 A1 discloses a liquid-cooled plate mold for Continuous casting of metals, in particular steel materials, in which the Kokillenplatten by means of fastening bolts each with a water tank or a support plate are connected. The fastening bolts engage in on the Water side of each mold plate arranged moldings, a through Soldered joints or by electron beam welding with the mold plate are positively connected.

The disadvantage of this solution is that usually additional recesses in the Water tank or in the adapter plate must be provided to the from the Coolant side of the mold plate protruding attachment pieces take. Furthermore, additional coolant channels are either in the mold plate or to bring in the adapter plate.

On this basis, the invention is based on the object, a liquid-cooled Mold for the continuous casting of metals with regard to the connection of copper mold plates in particular small wall thickness of an adapter plate or to improve a water tank in such a way that a fluidic convenient connection to the adapter plate or the water tank is possible.

Another object is to provide a particularly wear-resistant Mold seen at the same time thin-walled mold plates.

The invention proposes to solve the first task, a mold with the features of claim 1 before. Essential part of the mold according to the invention are island-like from the mold plate protruding plateau base, in a between the mold plate and the adapter plate or the water tank protrude formed coolant gap. The plateau pedestal or the intermediate spaces between the platform sockets form at least a certain Altitude range the coolant gap. With sufficient flow speed of the coolant are no further grooves in the coolant side of the mold plate or the mold plate facing side of the adapter plate or the Water tank required. The manufacturing effort is in the Solution according to the invention thus lower than in solutions with expensive Coolant guides.

The shape of the island-like plateausockel is chosen so that the flow resistance in the coolant gap is as low as possible. The plateau pedestals own Therefore, adapted to the flow direction of the coolant streamlined Shape.

Especially when the fastening bolts are fixed with in the platform sockets Thread inserts are engaged, the mold according to the invention has the advantage a conventional releasable connection between the adapter plate or the Water tank and the mold plate, even if extreme thin-walled mold plates are used (claim 2). The high of Plateausockel can depend on the height of the threaded inserts to get voted.

A particularly low flow resistance arises when the plateau pedestal are configured diamond-shaped (claim 3). Low resistance values result but also if the plateau pedestals are drop-shaped or elliptical in cross-section are formed.

It is considered particularly advantageous if the mold plate on the Plateausockel to the adjacent adapter plate or the adjacent Water tank is supported. In this case, there are no additional spacers to form a coolant gap required because the plateau socket the distance between the mold plate and the adapter plate or the water box set and thus determine the width of the coolant gap. This has the advantage that basically no further grooves or recesses for the guidance of coolant must be provided in the adapter plate or the mold plate. That the Adapter plate and the mold plate can, with the exception of the Plateausockel to the Coolant side be designed just, whereby the production engineering effort for the production of additional coolant channels or grooves basically eliminated. Optionally, of course, coolant channels or grooves both in the Adapter plate and at least partially provided in the mold plate be.

Another advantage of the mold plate of the invention is the fact that the Fixing bolts attacking clamping forces by the directly to Through hole adjacent support of the plateau socket on the adapter plate be introduced into the adapter plate or the water box on a short path. As a result, almost no bending moments arise in the mold plate (claim 4).

Optimal initiation of the clamping forces from the fastening bolts in the mold plate is then given when the Plateausockel a to Kokillenplatte have rounded transition area (claim 5). hereby become unwanted notch stresses in the connection area of the plateau pedestal avoided.

According to the features of claim 6 it is provided that the plateau pedestal are formed integrally with the mold plate. Here offers a milling-technical Processing of the coolant side of the mold plate, in which case the Plateausockel be formed.

It is also possible within the scope of the invention, the plateau socket as a separate To manufacture components and then connect to the mold plate. Prefers are cohesive bonding methods such as welding or Soldering (claim 7). For very different materials is also a bonding the Plateausockel conceivable with the mold plate.

The subject of claim 8 is a mold, wherein the mold plates have a wall thickness that is less than 2.5 times the diameter of the Mounting bolts. The diameters of the fastening bolts are usually in a range of about 8 mm to about 20 mm.

According to the features of claim 9, the coolant gap is fluid-conducting to the Adapter plate passing through coolant bushings connected. As a result of that the coolant gap over the coolant passages in the adapter plate ultimately with the adapter plate downstream cooling box in conjunction are, are additional lateral coolant supply, as for example by Deep wells within the mold plate to the prior art do not count required. In particular, the coolant supply and removal can completely over the adapter plate made, preferably for this purpose in regular Intervals with coolant supply and coolant discharges is provided, so that the desired cooling of the mold is achieved.

It is considered to be particularly advantageous within the scope of the invention if a Chill plate of small wall thickness together with an adapter plate one form a preassembled plate unit, as such, in total with a water box can be coupled. Due to the small wall thickness of the mold plate, the integration of the Coolant gaps through the plateau base and because of the directly in the Adapter plate arranged coolant passages, it is possible such Plate units for the exchange of mold plates of the same overall dimensions and connection dimensions to use (claim 10). With such a design Plate units can be made of copper plates that are much larger in size or a copper alloy can be completely and inexpensively replaced. The use a plate unit of a mold plate and a reusable Adapter plate is much cheaper than a massive mold plate Copper or a copper alloy after reaching its wear limit against to exchange a new one. In the mold according to the invention only needs exchanged the mold plate of small wall thickness for a new mold plate be reworked or on the previously used processing machines become. Advantageously, the mold plate has over its entire extent a consistent wall thickness.

In particular, to achieve high casting speeds and magnification The service life can Kokillenplatten made of a cured copper material a yield strength> 300 MPa are used (claim 11).

By using copper materials with high yield strength, it is possible the measured between the coolant gap and the casting side wall thickness of the Mold plate to reduce to dimensions of the order of about 5 mm 25 mm, preferably 10 mm to 18 mm lie (claim 12).

When using the mold according to the invention for high casting speeds, especially at casting speeds greater than 5 m / min it is according to the Characteristics of claim 13, provided that the mold plate in a Casting measured length of about 1.0 m to 1.5 m, preferably between 1.1 m to 1.4 m.

Depending on the expected mechanical and thermal loads As well as the stiffness of the mold plate, the Plateausockel in one Mutually spaced from about 50 mm to 250 mm (claim 14).

To compensate for thermal stresses it is according to the features of the claim 15 intends between the surface of the plateau base and an adapter plate or a water tank a relative movements enabling sliding assistance reintegrate. Relative movements in the sense of claim 15 are those described in the Level of the contacting surfaces of the plateau base and the adapter plate or the water box. The sliding aid can be attached both to the adapter plate or the water box and / or the surface of the plateau socket provided be. The sliding aid may in particular be a coating based on Polytetrafluoroethylene (PTFE) be (claim 16). Also the use of sliding washers is possible (claim 17).

Essential for a relative movement between the mold plate and the Adapter plate in the region of the connection is that the fastening bolts such Allow relative displacement. Such fastening bolts, basically Through holes in the adapter plate or the water tank with enforce sufficient clearance are the subject of claim 18. Complementary It is possible, even below a locking bolt securing Bolt head also provide sliding aids. These can be sliding washers or Be sliding coatings. Have the appropriate surface pairings while low adhesive and / or Gleitreibungswerte, in particular less than 0.1. A with the sliding surface corresponding surface can for this purpose For example, be chrome plated, polished or hardened. It is also conceivable incorporate elements below the screw head, the relative movement of the bolt against the clamped components enable. Here, for example, a disc with a spherical surface is conceivable, the is stored on one or both sides in conical surfaces. A double cone / ball combination allows with respect to each surface pairing a tilting movement, wherein by the superposition of these opposing tilting movements a lateral Relative movement of the bolt is effected.

The features of claim 19 also contribute advantageously to the, Relative displaceability of the mold plate relative to the adapter plate or a Water tank to improve, and in that the on the adapter plate or a water tank abutting surfaces of the plateau base in each other lying parallel planes. This is especially with mold plates with Central bulges for forming a funnel account for the circumstance carried, that arranged in the region of the bulge Plateausockel with in Distance tangent to the bulge extending surfaces each another Define slip plane. As a result, the glide planes intersect and can one hinder unimpeded relative movement of the mold plates. Through each other Parallel sliding planes solve this problem. In particular, can by the mutual alignment of the surfaces of the plateau base or the Gliding planes formed by a defined expansion direction of a Kokillenplatte be specified without causing tension Chill plate opposite the adapter plate or the water box comes.

Subject matter of claim 20 is that the mold plate is provided in the thermally most exposed contact area with the molten steel, in particular in the height range of the casting mirror with a diffusion barrier layer. Diffusion barrier layers can be formed of a metallic / metalloid material, but also of paints, resins or plastics, as well as ceramic materials. The diffusion barrier layer is preferably mounted in the upper half of the mold plate. It may have a thickness of 0.002 mm to 0.3 mm, in particular a thickness of 0.005 mm to 0.1 mm. The diffusion barrier layer may also be formed as a multilayer layer with a cover layer of ceramic material. The cover layer assumes the function of thermal insulation. The cover layer preferably consists of an oxide-ceramic material, such as aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO ₂ ) or magnesium oxide (MgO).

In addition, according to the features of claim 21, the mold plate in Casting below the casting level provided with a wear protection layer be whose layer thickness increases in the casting direction. Preferably, the lower half the casting side of the mold plate with such a wear protection layer fitted. Since thin-walled mold plates have little wear volume, it is considered particularly advantageous if the wear protection layer with respect to the layer thickness in the casting direction, i. towards the foot of the mold plate slightly increases. The wear protection layer is thus in cross section preferably wedge-shaped. According to the features of claim 22 may increase the layer thickness from about 0.1 mm to about 1 mm.

As coating materials for the wear protection layer nickel and nickel alloys are used. There are also spray methods for material application possible, such as high-speed flame spraying (HVOF), wire or plasma spraying method individually or in combination. The spray-applied coating materials may be, for example, WCCo or the abovementioned oxide-ceramic materials, such as aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO ₂ ) or also materials based on NiCrB.

Figur 1

in perspektivischer Darstellung die rückwärtige Ansicht einer aus einer Kokillenplatte und einer Adapterplatte gebildeten Platteneinheit, teilweise im Schnitt;

Figur 2

einen Querschnitt durch eine Adapterplatte und eine Kokillenplatte im Bereich eines Plateausockels;

Figur 3

in perspektivischer Darstellung den Ausschnitt einer Kokillenplatte in Blickrichtung auf einen an der Kühlmittelseite vorgesehenen Befestigungsbolzen;

Figur 4

einen Schnitt durch eine Kokillenplatte und eine Adapterplatte im Bereich eines Plateausockels und

Figur 5

eine perspektivische Darstellung einer Kokillenplatte mit Blickrichtung auf ihre Kühlmittelseite.

The invention will be explained in more detail with reference to an embodiment shown in the drawings. Show it:

FIG. 1

in perspective view the rear view of a plate unit formed from a mold plate and an adapter plate, partially in section;

FIG. 2

a cross section through an adapter plate and a mold plate in the region of a Plateausockels;

FIG. 3

a perspective view of the section of a mold plate in the direction of a provided on the coolant side mounting bolts;

FIG. 4

a section through a mold plate and an adapter plate in the region of a platform base and

FIG. 5

a perspective view of a mold plate facing the coolant side.

FIG. 1 shows, in partial section, a mold plate 1 which is connected to an adapter plate 2 '. is attached. The mold plate 1 and the adapter plate 2 'form a disk unit 3 a liquid-cooled mold not shown for continuous casting of Metals. The disk unit 3 is shown here only to one half, wherein in the right half of the image extending cutting plane divides the disk unit 3 approximately centrally. The Chill plate 1 consists of a copper alloy or a hardened Copper material, preferably with a yield strength of> 300 MPa and has over its entire extent a constant wall thickness D (Figure 5). The Disk unit 3 is for connection to a non-illustrated Water box provided, the disk unit 3 via quick connector with the Water box can be coupled. The disk unit 3 is in its entirety Dimensions configured so that conventional mold plates same Dimensions and connection dimensions completely against the disk unit 3, consisting from an adapter plate 2 'made of a steel material and the relatively thin Chill plate 1 can be replaced.

To cool the mold plate 1 with coolants, the adapter plate 2, 2 'with Coolant bushings 4 provided. The coolant passes through the Coolant bushings 4 in a between the mold plate 1 and the Adapter plate 2 formed coolant gap 5 (Figure 2). From FIG. 2 it becomes clear that the coolant gap 5 is not introduced into the adapter plate 2, but in its width B by island-like on the coolant side 6 of the mold plate. 1 projecting Plateausockel 7 is determined. A possible design of the Plateausockel 7 is clearly apparent from the figure 3. The plateau pedestal 7 have a substantially diamond-shaped configuration with each opposite pointed corners 8, 9 and rounded corners 10, 11. The Plateausockel 7 has in the direction of the sharp corners 8, 9 a larger Longitudinal direction than in the direction of the rounded corners 10, 11. The sharp corners 8, 9 of the platform base 7 are hereby clarified by the arrow S. Direction of flow adapted. Overall, the Plateausockel 7 hereby a streamlined shape. The Plateausockel 7 are in this Embodiment formed integrally with the mold plate 1. The Plateausockel 7 also have a rounded to the mold plate 1 towards Transition region 12, wherein the radius of the transition region 12 in this Embodiment corresponds substantially to the height H of the plateau pedestal 7. The Height H of a plateau pedestal 7 is constant, so that the surface 13 of the Plateau pedestal 7 is aligned parallel to the coolant side 6 of the mold plate 1.

In each platform socket 7 of the mold plate 1 engages a fastening bolt 14 a. For this purpose, a threaded insert 15 is anchored in the platform sockets 7, in the the fastening bolt 14 is screwed. In that shown in Figure 2 Embodiment passes through the fastening bolt 14 while a Through hole 16 in the adapter plate 2. The designed as an external hexagon Bolt head 17 of the fastening bolt 14 is supported via a disc 18 on the Water tank side 19 of the adapter plate 2 from. The fastening bolt 14 is in This embodiment is screwed vertically into the mold plate 1. It is in Frame of the invention also possible to choose other screw-in to a load-adapted fixation of the mold plate 1 to the adapter plate 2 to achieve. This means that the screw-in angle can deviate from 90 °. For a flat Concerns the bolt heads 17 can this purpose either the disc 18 obliquely be executed or the water tank side 19 with corresponding oblique Recesses be provided.

The fastening bolt 14 passes through the through hole 16 with clearance, so that a particular thermally induced relative displacement of the mold plate. 1 opposite the adapter plate 2 is possible. For this purpose, either the surface 13 the plateau base 7 and / or the adapter plate 2 facing side 20 of the Adapter plate at least locally with a relative movements enabling Be provided with sliding assistance. The sliding aid may preferably have a coating with be low coefficient of friction. This can be for example a material based on of polytetrafluoroethylene (PTFE). The engaged with the sliding aid Counter surface has to reduce the static friction and the sliding friction one appropriately prepared surface. For example, surface areas locally polished, cured or even coated, e.g. chromed, be.

In a manner not shown can also slide aids in the form of sliding discs be incorporated between the cooling plate and the adapter plate. The same Measures are also on the water tank side 19 of the adapter plate 2 in the area the support surface below the bolt head 17 possible. If necessary it can already be sufficient, a disc of elastomeric material in addition below the bolt head to order in this way not only relative displacements to compensate in the direction of the coolant channel 15, but also to thermally induced changes in length in the direction of the fastening bolt compensate.

Such an embodiment shows the embodiment of Figure 4. Here is a comparison with the embodiment of Figure 2 shorter executed fastening bolts 14 'including its bolt head 17' in a counterbore 21st admitted. In particular, due to the reduced length of the fastening bolt 14 'are means for compensating relative movements between the adapter plate 2' and the mold plate 1 of importance. For this purpose comes in the Embodiment of Figure 4 is a bolt head 17 'for use, in one piece with the fastening bolt 14 'may be formed, so that the fastening bolt configured as a screw. But it is also conceivable, the bolt head 17 'as a mother to design. The bolt head 17 'has in the direction of the mold plate 1 a preferably integrally machined widened collar 22 to axial forces to be able to record optimally. Below the collar 22 is optionally a integral with the bolt head 17 'formed disc enlarged diameter 23 provided on one side with a sliding aid 24 in the form of a PTFE coating is provided. This is followed by a sliding washer 25 with a PTFE coating 24 matching surface. The sliding disk 25 has a larger diameter than the coated disc 23 and is preferably chromed, polished or hardened.

Finally, below the sliding disk 25 is an elastic ring element 26th incorporated, on the necessary bias of the screw can be applied. The elastic ring member 26 is, for example, a ring of an elastomeric material, such as rubber, or is one or formed of several resilient elements. The elastic ring element 26 is supported finally on the collar-like bore bottom 27 of the counterbore 21 from. Around a defined relative movement of the fastening bolt 14 'within the Through hole 16 'in the adapter plate 2 to ensure that is Outer diameter of the coated with a sliding aid 24 disc 23 smaller measured as the outer diameter of the adjacent sliding washer 25. Die Sliding disk 25 and the elastic ring member are in their outer diameter only slightly smaller than the diameter of the counterbore, so that the by the fastening bolt 14 'exerted clamping force on the entire Bore ground 27 is transmitted. On the one hand, this results in low local Surface pressure on and on the other hand is a positional orientation of the sliding disk 25 is given to the PTFE-coated disc 23.

From Figures 1 and 5 it is clear that the plateau pedestal 7 evenly grid over the entire coolant side 6 of the mold plate 1 are distributed. In In this embodiment, the plateau pedestals 7 are perpendicular to each other standing rows and columns oriented, with their pointed corners 8, 9 in the Direction of flow S of the coolant, which in this embodiment of the Casting X corresponds. The casting direction X and the flow direction S can differ, e.g. also be directed opposite.

The mold plate 1 has a commonly used in the continuous casting Contour with central bulge, with their between the coolant side 6 and the Gießseite 28 measured wall thickness D is constant over its entire extent. Only the plateau pedestals 7, 7 'protrude out of the coolant side 8 like islands.

The plateau pedestals 7, 7 'have surfaces 13, 13' which in the illustrated Embodiment parallel to the immediately surrounding coolant side 6 of the Chill plate 1 are aligned. Is the coolant side 6 curved, as it is in Area of the bulge is the case, then the surface 13 'of the local Plateausockel 7 'be aligned tangentially to the curvature of the bulge. The means, the plateau pedestals 7, 7 'are in principle perpendicular to the respective Surface area of the coolant side 6 is arranged.

But it is also possible that all surfaces 13, 13 'of the plateau pedestal 7, 7' are aligned parallel to each other. Then the surfaces of the plateau pedestal 7 'of the bulge is not arranged tangentially to the coolant side 6, but close depending on their positioning at the bulge different angles with the coolant side 6 a. The advantage is that all Plateausockel 7, 7 'a have defined rectified direction of displacement, whereby stresses in the mold plate 1 are further reduced.

REFERENCE NUMBERS:

1 -

mold plate

2 -

adapter plate

2 '-

adapter plate

3 -

disk unit

4 -

Coolant feed

5 -

Coolant gap

6 -

Refrigerant side

7 -

plateau pedestals

7 '-

plateau pedestals

8th -

Corner of 7

9 -

Corner of 7

10 -

Corner of 7

11 -

Corner of 7

12 -

Transition area

13 -

Surface of 7

13 '-

Surface of 7 '

14 -

mounting bolts

14 '-

mounting bolts

15 -

threaded insert

16 -

Through Hole

16 '-

Through Hole

17 -

bolt head

17 '-

bolt head

18 -

disc

19 -

Water box side

20 -

Page of 2

21 -

Counterbore in 2 '

22 -

Collar of 17 '

23 -

disc

24 -

sliding aid

25 -

sliding disk

26 -

elastic ring element

27 -

hole bottom

B -

Width of 5

D -

wall thickness

H -

Height of 7

S -

flow direction

X -

casting

Claims (22)

1. Liquid-cooled mould for the continuous casting of metals, comprising mould plates (1) made of copper or a copper alloy, which are connected respectively to an adapter plate (2, 2') or a water tank by clamping bolts (14, 14'), characterised in that the clamping bolts (14, 14') are fastened to plateau pedestals (7, 7') which project in an island-like manner from the coolant side (6) of the mould plate (1) and protrude at least partially into a coolant gap (5) formed between the mould plate (1) and the adapter plate (2, 2') or the water tank, and have a streamlined shape adjusted to the flow direction (S) of the coolant.
2. Mould according to claim 1, characterised in that the clamping bolts (14, 14') engage with threaded inserts (15) fixed in the plateau pedestals (7, 7').
3. Mould according to claim 1 or 2, characterised in that the plateau pedestals (7, 7') are configured to be rhombic.
4. Mould according to any one of claims 1 to 3, characterised in that the mould plate (1) is supported via the plateau pedestals (7, 7') on the adjacent adapter plate (2, 2') or the adjacent water tank.
5. Mould according to any one of claims 1 to 4, characterised in that the plateau pedestals (7, 7') have a transition region (12) that is rounded towards the mould plate (1).
6. Mould according to any one of claims 1 to 5, characterised in that the plateau pedestals (7, 7') are formed in one piece with the mould plate (1).
7. Mould according to any one of claims 1 to 5, characterised in that the plateau pedestals (7, 7') are connected integrally to the mould plate (1).
8. Mould according to any one of claims 1 to 7, characterised in that the mould plates (1) have a wall thickness (D), which is less than 2.5 times the diameter of the clamping bolts.
9. Mould according to any one of claims 1 to 8, characterised in that the coolant gap (5) is connected in a fluid-conducting manner to the coolant ducts (4) which penetrate the adapter plate (2, 2').
10. Mould according to any one of claims 1 to 9, characterised in that a mould plate (1) with a small wall thickness (D) and the adapter plate (2, 2'), form a preassembled plate unit (3) which can be coupled to a water tank, for the exchange of mould plates of the same overall dimensions and connecting measurements as the plate unit (3).
11. Mould according to any one of claims 1 to 10, characterised in that the mould plate (1) consists of a hardened copper material with a yield point of more than 300 MPa.
12. Mould according to any one of claims 1 to 11, characterised in that the wall thickness (D) of the mould plate (1) measured between the coolant channel (5) and the casting side is between 5 mm and 25 mm.
13. Mould according to any one of claims 1 to 12, characterised in that the mould plate (1) has a length of 1.0 to 1.5 m measured in the casting direction (X).
14. Mould according to any one of claims 1 to 13, characterised in that the plateau pedestals (7, 7') are arranged at a mutual distance of about 50 mm to 250 mm.
15. Mould according to any one of claims 1 to 14, characterised in that a sliding aid (24) facilitating relative movements is incorporated between the surface (13) of the plateau pedestals (7, 7') and an adapter plate (2, 2') or a water tank.
16. Mould according to claim 15, characterised in that the sliding aid (24) is a coating based on polytetrafluorethylene.
17. Mould according to claim 16, characterised in that the sliding aid (25) is a sliding disc.
18. Mould according to any one of claims 1 to 17, characterised in that the clamping bolts (14, 14') facilitate a relative displacement of the mould plate (1) relative to the adjacent adapter plate (2) or the adjacent water tank.
19. Mould according to any one of claims 1 to 18, characterised in that the surfaces (13, 13') of the plateau pedestals (7, 7') resting on an adapter plate (2, 2') or on a water tank lie in planes that are parallel to one another.
20. Mould according to any one of claims 1 to 19, characterised in that the mould plate (1) is provided with a diffusion barrier in the contact region with a steel melt, that is thermally most stressed, in particular in the height range of the casting bath level.
21. Mould according to any one of claims 1 to 20, characterised in that the mould plate, in the casting direction (X) below the casting bath level, is provided with a wear-resistant layer, the layer thickness of the wear-resistant layer increasing in the casting direction (X).
22. Mould according to claim 21, characterised in that the layer thickness increases from about 0.1 mm to about 1 mm.

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