JP2003145251A - Continuous casting mold - Google Patents

Abstract

(57) [Summary] [Problem] When continuous casting is performed by applying an electromagnetic force, a mating surface of a cooling copper plate of a mold and a corner of a mold due to abrasion of a mating surface of a mold and adhesion of a splash near a corner of the mold. Provided is a continuous casting mold capable of preventing a decrease in insulation properties in the vicinity of a part and obtaining a high-quality cast piece for a long time. SOLUTION: This is a mold of a continuous casting apparatus having an electromagnetic coil, wherein a pair of first cooling copper plates is sandwiched between a pair of second cooling copper plates, and a pair of bags are combined with the first cooling copper plate. The plate and a pair of back plates combined with the second cooling copper plate are electrically insulated via an insulator, and the mating surface of the first cooling copper plate and the second cooling copper plate is
Continuous insulation in which the insulator near the corner is installed within 50 mm from the corner of the casting surface of the first and / or second cooling copper plate, and is electrically insulated via the insulator on the mating surface. It is a casting mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous casting apparatus having an electromagnetic coil, and relates to a casting mold capable of stably applying an electromagnetic force to a molten metal in a casting mold to obtain a high quality slab. is there.

[0002]

2. Description of the Related Art In the continuous casting technique for molten metal, the molten metal surface of the molten metal is stabilized, the surface of the continuously cast slab is smoothed,
And, in order to achieve a high casting speed, a technique of utilizing electromagnetic force during casting has been developed.
In Japanese Patent No. 2824, as shown in FIG. 14, an alternating current is supplied to a current-carrying coil 35 that is arranged so as to surround the mold 31 and is insulated by a refractory material to bend the meniscus portion of the molten metal 32, While promoting the inflow of powder 34,
It is disclosed that the surface texture is improved by reducing the contact pressure between the mold and the slab in the initial solidification.
However, the alternating magnetic field applied by the electromagnetic coil induces an induced current in the cooling copper plate forming the mold, and the surface effect attenuates the magnetic field to be applied to the molten metal in the mold.

In order to suppress the attenuation of the magnetic field in the mold and further improve the electromagnetic effect in this technique utilizing electromagnetic force, Japanese Patent Laid-Open No. 05-15949 discloses an internal water cooling structure as shown in FIG. A metal continuous casting apparatus comprising a metal mold 31 and an electromagnetic coil 35 that circulates the mold and passes a high-frequency current. The mold 31 comprises: a) an upper part thereof extending in the casting direction and a mold Has a segment portion 37 of an internally coolable structure divided by a plurality of slits 36 that do not reach the upper end of the, or b) a plurality of slits 36 that extend in the casting direction and reach the upper end of the mold.
Disclosed is a continuous casting device having an internally coolable segment 37 portion divided by and a plurality of girders connecting the segment portions, and in which the electromagnetic coil 35 is arranged so as to surround the segment portion. .

However, a mold provided with such a slit cannot be reinforced by a back plate or the like and has poor rigidity, so that the mold is apt to be thermally deformed and is applied to a mold for casting a large cross section such as a slab. It was difficult to do. In order to solve these points, Japanese Patent Laid-Open No. 2000-
In Japanese Patent No. 246397, as shown in FIG. 12, in a continuous casting apparatus for molten metal, which applies an electromagnetic force to a metal near a meniscus initial solidification portion of the molten metal in a continuous casting mold in a direction perpendicular to the mold wall, An electromagnetic coil 35 for passing an alternating current to the outer peripheral surface of the mold 31, a pair of first cooling copper plates 39, a first back plate 41 made of non-magnetic stainless steel combined with the copper plates, and a pair of first and second cooling plates. A second cooling copper plate 40 and a second back plate 42 made of non-magnetic stainless steel to be combined with the cooling copper plate 40;
And a plurality of divided cooling portions including an insulator 46, each of the first cooling copper plate and the second cooling copper plate has at least one groove on the surface opposite to the casting surface,
The groove forms the cooling passage 43 by hermetically fixing the surface side having the groove of the first and second cooling copper plates with the first and second back plates, respectively. The cooling copper plate and the second cooling copper plate are electrically insulated from each other via an insulator 46, and the first back plate and the second back plate are electrically insulated from each other. And a mold that is insulated and fastened at.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The mold of the continuous casting apparatus disclosed in Japanese Patent No. 46397 has an advantage that the loss of electromagnetic force can be reduced, and that the processing accuracy and the assembly accuracy can be secured by dividing the length of each side of the mold as a unit.

However, in this mold, as shown in FIG. 11 which is a schematic horizontal cross-sectional view in which a corner portion of a mold in which cooling copper plates are combined is enlarged, an insulator 46 which electrically insulates the cooling copper plates is matched with each other. It is arranged only on the surface 48, and molten metal penetrates into the gap created by abrasion of the mating surfaces due to repeated use of the mold, and splash of molten metal during casting adheres to the vicinity of the corner of the mold wall. As a result, it is unavoidable that the insulating properties deteriorate in the mating surfaces of the cooling copper plate and the hack plate of the mold and in the vicinity of the corners of the mold. When this insulating property deteriorates, an induced current flows in the cooling copper plate, and the magnetic field strength decreases. Therefore, there is a problem that the electromagnetic force applied to the molten metal is also reduced.

The present invention is a continuous casting apparatus for continuously casting molten metal having an electromagnetic coil, which ensures stable insulation of the mold even when the mold is used for a long period of time and obtains a good quality slab for a long period of time. To provide a casting mold.

[0008]

In order to solve the above problems, the present invention has the following structures.

(1) In a continuous casting apparatus having an electromagnetic coil, a pair of first cooling copper plates of a continuous casting mold are sandwiched by a pair of second cooling copper plates and combined with the first cooling copper plate. A pair of first back plates and the second
And a pair of second back plates that are combined with the cooling copper plate are electrically insulated from each other through an insulator, and a mating surface between the first cooling copper plate and the second cooling copper plate is
In the vicinity of a corner part, which is electrically insulated from each other via an insulator on the mating surface, and within 50 cm or less from the corner part of the casting surface of the first cooling copper plate and / or the second cooling copper plate. A mold for continuous casting of molten metal, characterized in that the insulating material of 1. is installed.

(2) In the mating surface of the first cooling copper plate and the second cooling copper plate, one or both of the first cooling copper plate and the second cooling copper plate is insulated from the mating surface. Characterized by things being arranged (1)
The continuous casting mold described.

(3) The insulator of the mating surface and the insulator near the corner are electrically insulating ceramic plates and / or electrically insulating ceramics formed by thermal spraying ( The mold for continuous casting according to 1) or (2).

(4) The insulator on the mating surface and the insulator near the corner are alumina ceramics and / or zirconia ceramics (1) to (3) A mold for continuous casting of molten metal according to one.

(5) The insulator near the corner is
A mold for continuous casting of molten metal according to any one of (1) to (4), which is an alumina-based ceramic, and the insulating material on the mating surface is zirconia-based ceramics.

(6) The insulating material of the mating surface is one or more of a mica plate, a ceramic fiber molding and Teflon (registered trademark) (1)
~ The mold for continuous casting according to any one of (5).

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings of the embodiments. FIG. 1 is a perspective view showing an assembly concept of the continuous casting mold of the present invention, and FIG. 2 is a horizontal sectional schematic view of the continuous casting mold of the present invention thus assembled. In FIG. 1 and FIG. 2, the continuous casting mold of the present invention comprises a first pair of opposed cooling copper plates 1 and 1 (usually the shorter side of the mold) and a second cooling copper plate opposed to sandwich them. 2, 2 (usually the long side of the mold) and the mold wall surface, and the first cooling copper plate is formed on the back surface of these cooling copper plates, that is, the surface of the cooling copper plate opposite to the side in contact with the molten steel. There are provided a pair of back plates 7, 7 that are combined with and support the 1, 1 to support them, and second back plates 8 and 8 that are combined with and support the second cooling copper plates 2 and 2. Further, the mating surface 12 between the first cooling copper plate and the second cooling copper plate sandwiching the first cooling copper plate is electrically insulated by the insulator, and the back plates 7 and 7 and the back plate 8 sandwiching the back plates 7 and 7 are sandwiched therebetween. , 8 are electrically insulated and fastened.

The back plate is preferably made of non-magnetic stainless steel, and there is a gap 13 between the back plate 7 and the back plate 8 combined therewith, and the back plate 7 is electrically insulated by a fastening bolt 14. Are fastened and fixed. That is, the insulating washer 10 and the insulating sleeve 1 are provided between the head and the shaft of the fastening bolt 14 and the outer surface of the back plate 8 and the inner surface of the bolt hole.
1 is interposed therebetween, which is electrically insulated and fastened and fixed, thereby forming a mold.

The gap 12 is formed by the deformation of the mold during casting,
In order to prevent a short circuit due to adhered matter, it is preferable to set the thickness to about 1 to 5 mm.

A coil 9 for passing an alternating current for giving an alternating magnetic field to the molten metal in the mold at the time of casting is provided on the outer periphery of the mold thus constructed. In addition, in this invention, an insulator means what electrically insulates.

As described above, the mating surface 12 between the first cooling copper plate 1 and the second cooling copper plate 2 arranged with the first cooling copper plate 1 sandwiched therebetween.
Is provided with an insulating material of a mating surface, and this insulating material is arranged on one or both surfaces of the cooling copper plate 1 and the cooling copper plate 2. That is, FIGS. 3 to 5 are schematic horizontal cross-sectional views in which the vicinity of the corner portion (A portion in FIG. 2) of the continuous casting mold of the present invention shown in FIG. 2 is enlarged. In the example shown in FIG. 3, the mating surface insulators 3 and 4 are provided on the mating surfaces 12 of both the first cooling copper plate 1 and the second cooling copper plate 2 arranged so as to sandwich the first cooling copper plate 1.

Further, FIGS. 6 (a) to 6 (c) and FIG.
Like FIGS. 3 to 5, (a) to (c) of FIG. 3 are horizontal cross-sectional schematic views in which the vicinity of the corner portion of the continuous casting mold of the present invention shown in FIG. 2 is enlarged, but as shown in these drawings. In addition, the insulator 3 or 4 on the mating surface may be arranged on the surface of either the cooling copper plate 1 or the cooling copper plate 2.

In the mold of the present invention, as described above,
In addition to interposing an insulator on the mating surface 12 of the cooling copper plate, an insulator is installed in the vicinity of the corner of the surface 17 of the cooling copper plate that comes into contact with the molten metal (hereinafter referred to as the casting surface).
That is, in the mold of FIG. 3, the insulator 5 near the corner is provided on the casting surface of the first cooling copper plate 1. Figure 4
In the example shown in (1), the insulator 6 near the corner is provided on the casting surface of the second cooling copper plate 2. Further, in the example shown in FIG. 5, insulators 5 and 6 near the corners are provided on the casting surfaces of the first and second cooling copper plates, respectively.

Further, FIGS. 6 (a) to 6 (c) and FIG.
(A) -FIG.7 (c) show the cooling copper plate in the case where the insulating material 3 or 4 of the mating surface is provided in the surface of either one of the mating surfaces 12 of the cooling copper plate as mentioned above. It shows the installation situation of the insulator 5 or 6 near the corner portion arranged on the casting surface.

That is, in FIGS. 6A to 6C, the insulator 3 of the mating surface is provided on the surface of the first cooling copper plate 1 of the mating surface, and further, FIG. 1 cooling copper plate
Insulator 5 near the corner is cast on the casting surface of Fig. 6 (b).
Is an insulator 6 near the corner on the casting surface of the second cooling copper plate 2, and FIG. 6C shows the first and second cooling copper plates 1, 2.
Insulators 5 and 6 near the corners are provided on the casting surface of No. 2, respectively. In the case of a continuous casting mold of a type in which the short side is moved (variable width type), FIG.
It is preferable to use (a).

The length of the contact portion of the insulator near the corner of the casting surface with the molten metal in the vicinity of the corner, that is, the width W of the insulator is such that the electrical insulation is ensured in a wide range. It is preferable to increase the size, but since many insulators generally have a lower thermal conductivity than copper plates, it is necessary to consider the influence on solidification by providing the insulator on the casting surface of the cooling copper plate.

In order to study this, the present inventors, as shown in the examples, have inner dimensions of 1500 mm × 250 m.
20 m of water-cooled mold with a height of 800 mm
A copper plate having a thickness of mm was used, and a back plate made of stainless steel having a thickness of 50 mm was arranged on the back surface thereof to form a mold as shown in FIG. In addition, as shown in FIG. 4, the insulating material of the mating surface is obtained by spraying zirconia-based ceramics on the mating surface of the first cooling copper plate 1 with a thickness of 0.5 mm × width of 20 mm.
B. An insulator 3 having a height of 800 mm was formed and electrically insulated.

On the other hand, on the mating surface of the second cooling copper plate 2,
Thickness 1 mm x (width 20 mm (matching surface) + width W (mm)
(Insulator near corner of casting surface) x height 200mm
The four alumina plates of No. 3 were vertically attached to form insulators 4 and 6 having a total height of 800 mm and electrically insulated. Here, W is the width of the insulator near the corner of the casting surface, and this width was changed variously. However, the integrated width of the width of the mating surface and the width of the insulator near the corner was combined. As described above, an alumina plate was prepared and adhered to a cooling copper plate.

Using the mold of the present invention thus constructed, molten steel S45C as a molten metal was supplied to the mold, continuous casting was performed, and the shell thickness of the corner at the lower end of the mold was measured by sulfur printing, Corner solidification delay rate = Minimum corner shell thickness at the bottom of the mold (m
m) / maximum shell thickness at the corner at the bottom of the mold (m
m) × 100 (%) was determined. This was plotted against the width W (mm) of the insulator near the corners, and the relationship shown in FIG. 9 was obtained. As can be seen from FIG. 9, when the contact length of the insulating material with the molten steel, that is, the width of the insulating material exceeds 50 mm, the solidification delay rate of the corner portion becomes large, exceeding 50% which is the strength limit of the solidified shell. . Therefore, the contact length of the insulator with the molten steel, that is, the width of the insulator arranged near the corner is 50 mm or less. For this reason, the insulator in the vicinity of the corners is installed within a range of 50 mm or less from the corners of the first and second cooling copper plates.

The thickness t (mm) of this insulator is preferably about 0.5 to 1.00 mm from the same thermal viewpoint.

Further, as shown in FIG. 8, it is desirable that the insulator near the corner portion is provided over the entire height in the vertical direction of the cooling copper plate of the mold, similarly to the insulator on the mating surface.

As a result, it is possible to prevent a wide range of deposits from adhering to the surface of the molten metal, and to prevent deterioration of insulation due to wear of the mating surfaces near the lower end. 8A shows an example in which the insulator 15 of the alumina plate is provided at the entire height in the vicinity of one corner of the first water-cooled copper plate, and FIG. 8B shows the thermal spraying of alumina in the vicinity of the corner of the cooling copper plate 1. Insulation 16
Is an example in which is provided. Further, in FIG. 8, an insulating material for the mating surface is provided on the surface of the first cooling copper plate, which is the mating surface, and FIG.
FIG. 8B shows an example in which a thermal spraying insulator 16 'of alumina is provided.

The insulating material near the mating surfaces and the corners may be any electrically insulating material having heat resistance, but the electrical insulating material has corrosion resistance against molten metal and excellent abrasion resistance. Ceramics are preferred. As such ceramics, alumina ceramics are preferable. Further, in a portion that does not always come into contact with the molten metal, for example, an upper portion of the mold, it is desirable to use zirconia-based ceramics that withstands a rapid temperature rise and also has insulating properties.

Therefore, the insulator of the mating surface may be a zirconia-based ceramic, and the insulator in the vicinity of the corner, which is the side (casting surface) in contact with the molten steel, may be an alumina-based ceramic. As a result, the thermal shock to the alumina-based ceramics due to the large temperature difference between the molten steel and the cooling copper plate can be mitigated.

Insulators for the mating surfaces are made of mica plate, alumina,
Ceramic fiber such as zirconia 0.1 to 1 mm
It is preferable to use Teflon (registered trademark) or the like that is molded into a plate shape.

The method of providing the insulating material near the mating surface and the corner portion of the cooling copper plate is as follows. An insulating material, such as a ceramic plate, is bonded with an adhesive (ceramics, etc.), a heat-resistant inorganic adhesive, or the like. A method of forming a sprayed layer on the surface of the copper plate by a spraying method of melting and injecting the above powder with plasma or gas can be appropriately adopted.

3 to 5, FIG. 6 (a), and FIG.
As shown in the examples of (c), FIG. 7 (b), and FIG. 7 (c), when the insulating material is installed on both the mating surface and the vicinity of the corner for the same cooling copper plate, Providing the insulator near the corner as a continuous, integrated
Needless to say, this is preferable in reducing the boundary between the insulators.

It is also preferable that the insulator near the corner and the insulator on the mating surface are made of the same insulating material and provided by the same method. For example, one alumina plate is provided with an insulating material provided on the mating surface of the first cooling copper plate and the second cooling copper plate, and near the corner of the first cooling copper plate and / or near the corner of the second cooling copper plate. It is also preferable that the insulating material is provided by adhering the insulating material, or similarly, the insulating material is sprayed to form a sprayed layer at one time.

The insulator near the corner and the insulator on the mating surface may be made of different insulating materials and may be provided by different methods or by the same method. Similarly, the insulator near the corner and the insulator on the mating surface are
The same insulating material may be used, and each may be provided by a different method or the same method.

In the mold of the present invention, the method for cooling the cooling copper plate may be such that a cooling water passage is provided between the copper plate and the back plate as disclosed in Japanese Patent Laid-Open No. 2000-246397, or inside the copper plate. A well-known method such as providing a cooling water passage by piercing a through hole can be adopted.

[0039]

EXAMPLES A water-cooled mold having internal dimensions of 1500 mm × 250 mm and a height of 800 mm was made of a copper plate having a thickness of 20 mm, and a back plate made of non-magnetic stainless steel having a thickness of 50 mm was arranged on the back surface thereof. Form the mold,
An electromagnetic coil was installed on the outer periphery of this mold. As shown in FIG. 4, the insulating material has a thickness of 0.5 m when the zirconia-based ceramic is sprayed on the mating surface of the first cooling copper plate 1.
An insulator 3 having a size of m × width 20 mm × height 800 mm was formed.

Further, a thickness of 1 mm is provided on the mating surface of the second cooling copper plate 2 and in the vicinity of the corner portion of the second cooling copper plate 2.
X (width 20 mm at the mating surface + width (W) 5 mm near the corner) x height 200 mm alumina plate 4
The sheets were attached in the height direction to form insulators 4 and 6 having a total height of 800 mm, respectively. The alumina plate was attached as an integrated plate having a combined width of the mating surfaces and the width near the corners.

Using the thus constructed mold of the present invention, molten steel of S45C as a molten metal was supplied to the mold, and continuous casting was carried out while passing an alternating current of 100 Hz to the electromagnetic coil 9.

For comparison, casting was performed in the same manner using a mold having no insulator near the corner.

After casting, the coil is energized,
The magnetic field strength was measured at the center of the coil in the vertical direction and at the center positions of the mold width and thickness, and the relative magnetic field strength between the magnetic field strength at each time point and the magnetic field strength in the initial state was investigated. The result is shown in FIG.

As can be seen from FIG. 10, when the conventional mold is used, the relative magnetic field strength decreases as the casting time elapses, whereas when the mold of the present invention is used, the casting time is reduced. Even if it exceeds 100 hours, the relative magnetic field does not decrease, and it can be seen that the insulation is sufficiently secured as in the initial stage.

[0045]

INDUSTRIAL APPLICABILITY The continuous casting mold of the present invention, when continuously casting molten metal by applying an electromagnetic force, causes wear of the mating surfaces due to repeated use of the mold and splash of molten metal near the corners of the mold. It is possible to prevent deterioration of the insulation on the mating surface of the cooling copper plate of the mold and the vicinity of the corners of the mold due to adhesion, etc. Even when the mold is used for a long time, the insulation of the mold is stably secured, and a good quality slab for a long time Can be obtained.

[Brief description of drawings]

FIG. 1 is an assembly conceptual diagram of a continuous casting mold of the present invention.

FIG. 2 is a schematic horizontal sectional view of the continuous casting mold of the present invention.

FIG. 3 is a view of a corner portion (A of the continuous casting mold of the present invention).
Partial horizontal cross-sectional schematic view showing the arrangement of the insulating material.

FIG. 4 is a view showing the vicinity of a corner portion of the continuous casting mold of the present invention (A
Partial horizontal cross-sectional schematic view showing another arrangement state of the insulator of FIG.

FIG. 5 is a view showing the vicinity of a corner portion of the continuous casting mold of the present invention (A
Partial horizontal cross-sectional schematic view showing another arrangement state of the insulator of FIG.

FIG. 6 is a view showing the vicinity of a corner portion of the continuous casting mold of the present invention (A
(A) is a partial horizontal cross-sectional schematic view showing an arrangement state of insulators, where (a) is one copper plate in the vicinity of a corner, and (b) is
Shows a situation in which an insulator is placed on the other one of the copper plates near the corner, and (c) shows a situation where an insulator is placed on both of the copper plates near the corner.

FIG. 7 is a view of a corner portion (A of the continuous casting mold of the present invention).
(A) is a partial horizontal cross-sectional schematic view showing an arrangement state of insulators, where (a) is one copper plate in the vicinity of a corner, and (b) is
Shows a situation in which an insulator is placed on the other one of the copper plates near the corner, and (c) shows a situation where an insulator is placed on both of the copper plates near the corner.

FIG. 8 is a schematic partial vertical cross-sectional view showing the arrangement of insulators in the vicinity of the corners of the continuous casting mold of the present invention,
(A) shows the arrangement of insulators near the corners by attaching an alumina plate, and (b) shows the arrangement of insulators near the corners by thermal spraying of alumina.

FIG. 9 is a diagram showing the relationship between the width of an insulator near the corner and the solidification delay rate of the corner of the continuous casting mold of the present invention.

FIG. 10 is a diagram showing the relationship between casting time and relative magnetic field strength in the continuous casting mold of the present invention.

FIG. 11 is a schematic partial horizontal cross-sectional view showing a state of attachment of deposits on a mold wall in a conventional mold.

FIG. 12 is a horizontal sectional view of a conventional continuous casting mold.

FIG. 13 is a horizontal sectional view of a conventional continuous casting mold.

FIG. 14 is a conceptual diagram showing a continuous casting technique for applying an electromagnetic force.

[Explanation of symbols]

1 ... First cooling copper plate 2 ... Second cooling copper plate 3 ... Insulator on the mating surface of the first cooling copper plate 4 ... Insulator on the mating surface of the second cooling copper plate 5 ... Insulator near the corner of the first cooling copper plate 6 ... Insulator near corner of second cooling copper plate 7 ... 1st back plate 8 ... Second back plate 9 ... Electromagnetic coil 10 ... Insulation washer 11 ... Insulation sleeve 12 ... Mating surface of cooling copper plate 13 ... Gap 14 ... Fastening bolt 15, 15 '... Ceramic plate 16, 16 '... Ceramic sprayed layer 17 ... Casting surface 31 ... Mold 32 ... Molten metal 33 ... Meniscus 34 ... Powder 35 ... energizing coil 36 ... Slit 37 ... Segment 38 ... Immersion nozzle 39 ... First cooling copper plate 40 ... Second cooling copper plate 41 ... First back plate 42 ... Second back plate 43 ... Cooling water passage 44 ... Fastening bolt 45 ... Insulation fastening bolt 46 ... Insulator 47 ... Sealed material 48 ... Mating surface 49 ... Casting surface

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Rikiya Kanno             12 Nakamachi, Muroran City, Hokkaido Nippon Steel Corporation Stock             Muroran Works F-term (reference) 4E004 AA04 AA09 MA10 NB01

Claims (6)

[Claims] 1. A continuous casting apparatus having an electromagnetic coil, wherein a pair of first cooling copper plates of a continuous casting mold has a pair of second cooling copper plates.
And a pair of second back plates combined with the second cooling copper plate and an insulating material. Electrically isolated from each other via the first
The mating surface of the cooling copper plate and the second cooling copper plate are electrically insulated from each other via the insulator of the mating surface,
And a casting mold for continuous casting, characterized in that an insulator near a corner portion is installed in a range of 50 mm or less from a corner portion of a casting surface of the first cooling copper plate and / or the second cooling copper plate. . 2. The first cooling copper plate and the second cooling copper plate at the mating surface of the first cooling copper plate and the second cooling copper plate.
The casting mold for continuous casting according to claim 1, wherein an insulator of the mating surface is arranged on either or both of the cooling copper plates. 3. The insulating material on the mating surface and the insulating material near the corner are an electrically insulating ceramic plate and / or an electrically insulating ceramic formed by thermal spraying. The continuous casting mold according to 1 or 2. 4. The insulator of the mating surface and the insulator near the corner are alumina-based ceramics and / or zirconia-based ceramics, according to any one of claims 1 to 3. Continuous casting mold. 5. The insulating material in the vicinity of the corner portion is alumina ceramics, and the insulating material on the mating surface is zirconia ceramics.
The continuous casting mold according to any one of 4 above. 6. The insulating material of the mating surface is a mica plate, a ceramic fiber molding, or Teflon (registered trademark) 1.
The mold for continuous casting according to any one of claims 1 to 5, characterized in that there are two or more kinds.