JPH0237943A - Heating mold for continuous casting and method for continuous casting - Google Patents

Abstract

PURPOSE:To improve the quality of a mold, to stabilize casting and to extend the service life by forming heating zone composing of an electric conductive heating element arranging electromagnetic induction coil at outer circumference and a lining material arranged at the inside thereof. CONSTITUTION:The heating zone 1 is constituted of at least the heating element 1-1 composing of the electric conductive material and the lining material 1-2 having excellent corrosion resistance at the contact face side with molten metal (a). By indirectly heating with the electromagnetic induction coil 4 arranging the lining material 1-2 at the outer circumference of the heating element 1-1, the solidification at the molten metal surface can be prevented and it is possible to start to solidify below the molten metal surface. The heating element is formed with electric conductive refractory composing of, for example, 5-40wt.% C, <35wt.% silicon oxide, 30-60wt.% aluminum oxide, 3-50wt.% zirconium oxide and inevitable imprities.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mold and a continuous casting method that enable continuous casting of molten metal while heating a cast material.

(Conventional technology) Continuous casting equipment is mainly of the vertical type, vertical bending type, curved type, etc. Injected from the tundish into the mold through a submerged nozzle, and continuously cooled and solidified downward from the meniscus in the mold. Then, it becomes a slab. The slab is pulled downward, and at this time, the mold is vibrated and a flux of a predetermined viscosity is used to prevent the slab from seizing within the mold.

However, this flux dynamically changes the meniscus shape when it flows between the mold and the slab, which not only forms oscillation marks and deteriorates the surface quality of the slab, but also They are captured in the solidified shell and form defects on the slab inclusions.

These oscillation marks and inclusion defects are caused by casting proceeding with the solidification start point and scene position coincident. For this reason, the present applicant proposed in Japanese Patent Application No. 62-87009 a continuous casting method using a mold having a heating function that separates the solidification start point from the scene position and solidifies below the scene.

This continuous casting method uses a mold consisting of a heating section and a cooling section, arranges a conductive material on the inner surface of the mold, heats it by induction heating, and causes initial solidification to occur below the casting surface.

As a result of repeated experiments using this method, the inventors of the present invention have clarified the characteristics required for the mold, and found that the parts of the inner surface of the mold that come into contact with molten steel have corrosion resistance, electrical conductivity, and the formation of an initial solidified shell. It was found that corrosion resistance, electrical conductivity, and lubricity are required in the transition area between the heating section and the cooling section, and that heat removal performance and lubricity are important in the cooling section.

In addition to regular continuous casting, there is also a continuous casting method (hereinafter referred to as core material casting method) in which composite materials are manufactured by using a solid object as the inner layer material and continuously supplying molten metal to the outer periphery of the material. is proposed. Particularly in this case, there was a risk that the bonding between the solid object forming the inner layer and the molten metal would be poor.

Since most of the clad materials must be shaped and used later by processing such as rolling or shearing, it is necessary to have a strong joint that can withstand processing.

The core material casting method is disclosed in Japanese Patent Publication No. 59-19786, Japanese Patent Application Laid-open No. 61-195740, and the like.

Japanese Patent Publication No. 59-19786 discloses that an induction heating device for heating the core material is placed above the mold, the surface layer of the core material is remelted, and the core material is immersed in the outer layer metal which is kept in a molten state by another heating device. This is a method of joining. It is thought that a good joint can be obtained by remelting and joining the core material surface, but remelting requires a large amount of heating power, and casting speed is limited due to restrictions such as mold lubrication and remelting time. Prices are kept low, productivity is low, and cost reduction cannot be expected. Also,
Since graphite is used in the mold for the molten part, melting of the graphite occurs unavoidably, making it impossible to cast for a long time, and the melted graphite dissolves in the molten metal, increasing the carbon concentration.
It is impossible to obtain the desired molten steel composition. In our experience, the graphite erosion rate is approximately 1 at 1500"C.
mm/min, and the surface layer of the obtained slab rose to a cast iron composition. Therefore, it is impossible to obtain a good rad material using this method of bringing graphite and molten steel into contact.

JP-A No. 61-195740 basically converts the horizontal continuous casting method vertically and brings the core material into the mold through a tundish. However, the disadvantages of horizontal continuous casting such as cold shut marks and cranks It is well known that this occurs unavoidably, and surface care after casting is essential. Therefore, the yield of outer layer steel is significantly inferior. Stainless steel or the like is normally used as the outer layer material, but it is generally more expensive than inner layer steel (carbon steel, etc.), so removing the outer layer material is extremely disadvantageous in terms of cost. Further, (Problem to be Solved by the Invention) In a continuous casting mold having a heating function, it is essential to optimize the mold material because the main characteristics differ depending on the part. Therefore, the present inventors aim to improve the mold material based on the necessary conditions at the mold site, and aim to stabilize casting and extend its life.

In addition, if the bonded state is incomplete during the manufacture of composite materials, the bond is strengthened by subsequent rolling, but if the original bond is defective, it can easily peel off due to rolling strain, resulting in a decrease in product yield. expected. Furthermore, to take it to the extreme, if the slabs are insufficiently joined, they will oxidize in the heating furnace before rolling, and oxides will be generated at the interface that will inhibit joining, making joining by rolling basically impossible. . Therefore, when manufacturing a composite material by a rolling method, measures are taken to prevent oxidation by lowering the oxygen partial pressure by, for example, sealing the bonded member in a vacuum.

Therefore, in order to manufacture composite materials by casting, it is necessary that the bonding strength of the composite materials is sufficient, that the composite interfaces are stable and there is no variation in plate thickness, and that the cladding ratio is highly flexible. I can say it.

In terms of cost, since composite materials are often produced in small quantities, the manufacturing method needs to be simple and have high production efficiency.

(Means for solving problems) The invention is as follows.

■ A mold for continuous casting in which a heating zone is followed by a cooling zone from the molten metal entry side, and the heating zone is formed from a heating element made of a conductive material and a lining material provided on its inner surface,
A heating mold for continuous casting, characterized in that an electromagnetic induction coil is provided around the outer periphery of the heating element.

■ A mold for continuous casting in which a cooling zone is provided following heating (1) from the molten metal entry side, and the heating zone is a direct current heating heating element made of a conductive material and a lining material provided on its inner surface. A heating mold for continuous casting, characterized in that it is formed from.

■ The mold according to (1) or (2) above, in which the heating element is made of graphite and unavoidable impurities.

(2) The heating element is a conductive refractory consisting of 5 to 40% by weight of carbon, less than 35% by weight of silicon oxide, 30 to 60% by weight of aluminum oxide, 3 to 50% by weight of zirconium oxide, and inevitable impurities. mold.

(2) The mold according to (1) or (2) above, wherein the heating element is a conductive refractory consisting of 5 to 45% by weight of carbon, 30 to 93% by weight of zirconium oxide, and inevitable impurities.

■ Any of the above ■ to ■, wherein the lining material is a refractory material consisting of 5 to 40% by weight of carbon, less than 35% by weight of silicon oxide, 30 to 60% by weight of aluminum oxide, 3 to 50% by weight of zirconium oxide, and unavoidable impurities. Mold described in Crab.

(2) The mold according to any one of (1) to (4) above, wherein the lining material is a refractory material consisting of 5 to 45% by weight of carbon, 30 to 93% by weight of zirconium oxide, and inevitable impurities.

■ The lining material is a refractory consisting of boron nitride 30-970-97 weight silicon nitride and unavoidable impurities.
The mold described in any of the above.

(2) The mold according to any one of (1) to (3) above, wherein the lining material is a refractory material consisting of 30 to 97% by weight of boron nitride, the balance being aluminum nitride and unavoidable impurities.

[Phase] The mold according to any one of (1) to (4) above, wherein the lining material is disposed near the solidification start point where initial solidification is formed within the mold.

■ The heating mold for continuous casting as described in (1) or (2) above, which is a water-cooled mold in which the cooling zone is lined with graphite or coated with lubricant plating.

@ In a method of continuously casting molten metal, a mold is made up of a heating zone and a cooling zone, and the heating zone is made up of a heating element and a lining material, and the molten metal that is injected is heated by heating the heating element. A continuous casting method characterized by heating and casting in such a way that the solidification start point of the molten metal in the mold is below the molten metal surface.

■ In a method of continuous casting of composite materials, a mold consisting of a heating zone and a cooling zone is used, and the heating zone is composed of a heating element and a lining material, and the molten metal and molten metal injected by heating the heating element are used. A continuous casting method for composite materials, characterized by continuous casting by heating a core material inserted into the center.

(2) The method described in @ or (2) above using the mold described in any one of (1) to [phase] above.

[Phase] The method according to any one of @ to (■) above, using the mold described in (1) above.

■The method described in any of the above.

(Function) FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing another embodiment. All of them show fir cross sections.

The heating zone 1 is formed from a heating element 1-1 on the heating mold side, and from a lining material 1-2 having physical properties excellent in corrosion resistance and lubricity on the side in contact with molten metal. The heating zone 1 must be heated by induction, and is required to have electrical conductivity and molten steel corrosion resistance. b is the initial grain formation position, and the material corresponding to this area is particularly required to have lubricity and corrosion resistance.

The cooling zone 2 is required to have heat removal properties and lubricity, and a material having both lubricity and heat removal properties, such as graphite or boron nitride, can be used. Alternatively, a water-cooled copper mold with lubricant plating may be used.

Since the heating zone 1 also needs to take thermal shock resistance into consideration, it has a two-layer structure in the present invention. When performing induction heating, we focused on the fact that current flows in the direction of the inner circumference of the mold and generates heat, so we designed the heating zone to have a layered structure in the thickness direction of the heating member, and divided the electrical characteristics and the other above-mentioned characteristics. That is, when heat is generated by induction heating, heat is generated preferentially in the depth region where the current penetrates from the outer periphery toward the inner surface of the mold material, although the depth varies depending on the frequency. Furthermore, since the contact surface with the molten steel is on the inner surface of the mold material, it is possible to perform functional division in the plate thickness direction. In this respect, the outer periphery of the mold material can be considered as a heating element, and the inner surface can be selected from an optimal material as a lining material.

Therefore, the heating zone 1 is at least connected to the heating element 1-1 made of a conductive material and the lining material 1 having excellent corrosion resistance on the contact surface side of the molten metal.
-2. The lining material 1-2 does not necessarily have to be electrically conductive, but only needs to be indirectly heated by the surrounding heating element 1-1, which makes it possible to prevent coagulation in the scene, and solidification starts below the scene. can be done.

Graphite is optimal for the heating element 1-1 used in the heating zone 1. This is evident from the fact that graphite is often used as a heating element in various furnace bodies. However, in cold conditions, graphite reacts with oxygen in the air and deteriorates and wears out. Therefore, when used as a mold self-heating element for a long time or repeatedly, it is necessary to prevent reactions such as oxygen. This can be easily prevented by covering the surrounding area with filler. In addition, ensuring electrical conductivity can be achieved at low cost by using a carbon-containing refractory material, and it is also possible to prevent reaction deterioration of graphite. That is, 5-40% by weight of carbon, 3% by weight of silicon oxide
Conductive material containing less than 5% by weight, 30 to 60% by weight of aluminum oxide, 3 to 50% by weight of zirconium oxide and unavoidable impurities, or 5 to 45% by weight of carbon, 30 to 93% by weight of zirconium oxide and unavoidable impurities. Good results can also be obtained with conductive materials. If the carbon content is less than 5% by weight, the electrical conductivity will be poor, heating will not be stable, the thermal shock resistance will be poor, and cracks will occur when molten steel is injected. Also, the carbon content is 40 or 45% by weight.
If it exceeds this, corrosion resistance will be poor and the reactivity of carbon cannot be suppressed. Furthermore, aluminum oxide, silicon oxide, and zirconium oxide are added for the purpose of suppressing the reactivity of graphite or carbon and improving corrosion resistance.

Next, if graphite is used, the lining material 1-2 on the molten metal contact surface side located inside the heating element 1-1 will be eroded by the molten metal, such as molten steel, and will not only be unable to form a mold, but also Carbon elutes, increasing the carbon concentration and making it unusable. Therefore, it is necessary to select a material for the molten metal contact surface that prevents reaction with the molten metal, prevents seizure of the solidified shell, and improves the thermal shock resistance of the mold material.

This may be made of the same material and composition as the materials other than graphite mentioned above as the materials forming the heating element 1-1, or
This can be achieved with a material consisting of 30 to 97% by weight of boron nitride, the remainder silicon nitride and unavoidable impurities, or a refractory material consisting of 30 to 97% by weight of boron nitride, the remainder aluminum nitride and unavoidable impurities.

Boron nitride is contained in an amount of 30 to 97% by weight for the purpose of preventing seizure of the solidified shell and improving the thermal shock resistance of the mold material. Silicon nitride or aluminum nitride is added for the purpose of increasing the hardness of boron nitride and preventing wear of the mold material due to slab friction.

If the boron nitride content is less than 30% by weight, the mold material will crack due to thermal shock, and if it exceeds 97% by weight, the mold will be severely worn out.

It is desirable that the heating element 1-1 and the lining material 1-2 are configured in close contact with each other and are integrated.

Since the heating zone 1 is composed of the heating element 1-1 and the lining material 1-2 as described above, it is heated by induction by the electromagnetic induction coil 4, thereby indirectly heating the lining material 1-2. Of course,
When the lining material 1-2 has conductivity, it is also directly heated and heated by the electromagnetic induction coil 4.

Next, the formation of the cooling zone 2 will be described. The cooling zone 2 is constructed by pasting graphite on the cooling mold 5 or applying lubricant plating to the cooling mold 5. The cooling mold 5 may be made of ordinary copper.

The temperature detector 8 monitors the heating temperature of the lining material, thereby controlling the initial solidification position within the mold. Further, it is also possible to feed back the heating power to the control device as needed, making it possible to control the applied power and the entire casting apparatus. However, the temperature detector 8 is not essential because the applied power conditions can be determined by conducting experiments in advance.

Note 5. Although the above explanations have all been made with respect to the vertical cross section of the mold, the cross section may have a commonly used cross-sectional shape such as a circular or rectangular shape, and there are no particular requirements.

Next, other embodiments of the present invention will be described. FIG. 2 is an explanatory diagram showing another embodiment of the present invention.

A lining material 1-2 having excellent corrosion resistance is partially applied to about the lower half in the longitudinal direction of the casting near the solidification start point where initial solidification is formed in the mold. However, other parts are formed with heat generation≠1-1,
In this case, conductive refractories other than graphite can be used.

Next, the case where the core material casting method is performed using the above mold will be described. FIG. 3 is an explanatory diagram showing implementation B. The mold 13 is composed of a heating zone 11 and a cooling zone 12. The heating zone 11 includes a heating element 1-1, a lining i that contacts the molten metal,
t1-2. The lining material 1-2 is lined with the heating element 1-1. Reference numeral 14 has a structure in which an electromagnetic conductor for heating the heating element is provided smoothly, and there is no step (difference in dimension).

The heating temperature can be monitored with a temperature detector 8 to achieve sufficient heating for bonding. Furthermore, it is possible to feed back the heating power to the control device as needed, making it possible to control the power and the entire casting apparatus.

FIG. 4 is a detailed view of the composite slab manufacturing method of the present invention, and FIGS. 4(a) and 4(b) each show a different embodiment.

FIG. 4(a) shows an example in which the lining material 1-2 is installed over the entire length of the heating zone 11, and FIG. This is an example in which a mold is used in which only the vicinity where solidification starts, for example, the lower half of the heating zone 11, is formed of the lining material 1-2.

In either case, the mold 13 is
When the molten metal a injected into the core material d comes into contact with the core material d, it is cooled by the core material d and solidifies around the core material d.
form. This state corresponds to the conventional combination method. In the present invention, the heating zone 11 on the upper part of the mold 13 heats the core material d together with the molten metal a to a marginal temperature, and the initially generated solidified shell disappears to form the disappearing part e-2, thereby achieving joining with the core material d. After that, it is re-solidified to form a re-solidified part e-3 to obtain a composite slab e.

The solidified shell is not directly melted by heating, but is heated to a high temperature to promote the diffusion of alloying elements and unavoidable impurities contained in the molten metal a and core material d, alloying the vicinity of the bonding interface and reducing the This is achieved by creating a melting point region. Therefore, the heating power can be kept lower than the power required for direct heating and melting.

FIG. 4(b) shows an example in which the lining material is varied in the casting direction, and thereby the expensive lining material can be reduced to the necessary minimum.

As the heating means, an induction heating method is effective. With induction heating, the induction stirring of molten metal or the heating depth can be changed arbitrarily by changing the power frequency, so it is expected to increase the temperature of the core material and molten metal and to clean surface contaminated layers such as oxide films. Accordingly, composite slabs can be manufactured reliably and easily.

According to the present invention, since the heating zone is divided into functions,
Not only in the continuous casting of composite slabs but also in the continuous casting of ordinary materials, it is possible to separate the solidification start point from the scene.

In addition, by using a lining material on the surface that comes in contact with molten metal, the carbon content of the lining material can be reduced, and boron nitride-based materials can be used in addition to carbon-containing refractory materials, so mold materials It has the advantage that melting loss of carbon can be suppressed, and good composition can be maintained without molten metal contamination of carbon.

In addition, heating has the effect of moving the solidification start point to a position deeper than the surface, and enables subsurface solidification, so there is no need for flux for mold lubrication, and the problem of inclusions caused by flux entrainment is basically eliminated. It doesn't happen.

Furthermore, it is possible to prevent scum on the surface, inclusions inevitably included in the molten metal, etc. from being captured in the solidified shell, and a good slab can be obtained.

Furthermore, it has been found that by performing casting according to the present invention with the solidification start point below the surface, it is possible to obtain an extremely good slab surface without any oscillation marks. This eliminates the need for surface care of the slab, improves yield, reduces care costs, and reduces manufacturing costs.

Particularly in the core casting method, the present invention achieves joining by heating the core material to a temperature close to its melting point and simultaneously heating the molten metal. The joining is achieved by promoting the diffusion of alloying elements or metals, forming an alloy layer at the joint, and creating a region with a melting point lower than the melting point of the core material or molten metal, that is, by diffusion melting. Since it only promotes the diffusion of solute elements, it also has the characteristic that only a small amount of heating power is required. Of course, it is also possible to re-melt and bond each time the heating power is increased.

Further, an advantage of forming the heating zone by a heating element and a lining material is that the heating zone can be preheated by an induction coil before casting. This prevents the inner refractory material from being destroyed by thermal shock caused by molten metal injection by performing preheating, and also enables stable subsurface solidification by heating from the initial stage of casting. In order to preheat the mold, it is necessary that the heating element has electrical conductivity, and as mentioned above, graphite or a carbon-containing material is effective.

Since the method of the present invention does not use a large amount of carbon on the contact surface with the molten metal, good components can be maintained without contamination of the carbon with the molten metal due to melting loss.

Heating also has the effect of moving the solidification starting point to a position deeper than the surface, making it possible to solidify below the surface of the hot water. Subsurface solidification does not require continuous casting powder (for example, oxide slag, which functions as a lubricant), so there is no joining failure due to powder entrainment at the joining interface. Furthermore, scum on the surface, inclusions inevitably included in the molten metal, and the like can be prevented from being captured by the solidified grain, and a good slab can be obtained.

Furthermore, oscillation marks on the surface of the slab do not occur at all due to the subsurface hardening that does not use powder. This eliminates the need for surface care of the slab, improves yield, reduces care costs, and lowers manufacturing costs.

In addition, in the above explanation, the heating method of the heating body in the present invention was mainly explained by induction heating, but as the heating means of the heating body, there is also a direct energization method usually used for conductive materials. Electrical heating can be adopted.

In that case, electrodes may be provided at both ends of the heating element so that the current flows evenly throughout the heating element.

(Example 1) A heating element and a lining material were selected as shown in Table 1, a heating zone was constructed, and continuous casting was performed under the conditions shown in Table 2. The mold is as shown in Figure 1, and the heating zone length is 44 mm.
0 mm, and the length of the cooling zone was 600 mm.

Table 2 Table 3 The results of each casting are also shown in Table 1.

(Actual implementation 2) Not shown in Figure 3 Actual /i'I! Based on the aspect, a case where a composite material is continuously cast will be shown. The molds used were those shown in Nos. 4 and 5 in Table 1. The casting conditions are the third
As shown in the table. In addition, the length of the heating zone is 440 mm.
mm, and the length of the cooling 4jF was 600 mm.

Regarding the casting results, FIGS. 5 and 6 show the component distribution in the thickness direction and the surface roughness of the slab of the composite slab obtained in the example.

FIG. 5 shows the component distribution in the plate thickness direction of the obtained composite slab. The width of the component transition layer near the bonding interface, which is important for a composite material, is as small as 300μ for Cr, indicating good bonding.

The diffusion widths of other elements are as shown in Table 4,
Both values are small.

Table 4, Figure 6 shows the surface roughness of the slab, which shows that it is extremely smooth and can be used as is for later processing steps such as rolling without any maintenance.

(Effects of the Invention) As shown above, a good mold can be constructed according to the present invention. In addition, the obtained slab has good surface properties, can omit cleaning steps, and can be used directly as a material for the next process, reducing manufacturing costs, making it an extremely meaningful invention for steel manufacturing.

In addition, the present invention makes it possible to produce complete and good composite slabs, and the resulting slabs have good surface properties, making it possible to omit maintenance steps, etc., and directly use them as materials for the next process, reducing manufacturing costs. This is an extremely meaningful invention for the production of composite materials.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional view showing another embodiment, Fig. 3 is a longitudinal sectional view showing an embodiment in continuous casting of composite materials, and Fig. 4. (a) is the third
4(b) is a detailed explanatory diagram of the essential parts of the figure, FIG. 4(b) is a detailed explanatory diagram of the essential parts similarly showing another embodiment, No.
... Heating element, 1-2 ... Lining material, 2 ... Cooling zone,
3... Heating mold, 4... Electromagnetic induction coil, 5...
...Cooling mold, 6... Molten metal injection pipe, 7...
Molten metal container, 8... Temperature detector, 9... Slab guide device, IO... Spray nozzle, 11... Heating zone,
12... Cooling zone, 13... Mold, 14... Electromagnetic induction coil, 15... Mold, 16... Immersion nozzle, 1
7... Ladle, a... Molten metal, b... Formation position of initial solidified grain, C... Slab, d... Core material, e... Composite slab. 72 figure 71'3 figure 7i5 figure 76 figure? @H table

Claims (16)

[Claims] (1) A mold for continuous casting in which a heating zone is followed by a cooling zone from the molten metal entry side, and the heating zone is formed from a heating element made of a conductive material and a lining material provided inside the heating zone. A heating mold for continuous casting, characterized in that an electromagnetic induction coil is provided around the outer periphery of the heating element. (2) A mold for continuous casting in which a cooling zone is provided following the heating zone from the molten metal entry side, the heating zone being a direct current heating heating element made of a conductive material and a lining material provided on the inner surface of the heating zone. A heating mold for continuous casting, characterized in that it is formed from. (3) The mold according to claim 1 or 2, wherein the heating element comprises graphite and inevitable impurities. (4) Claim 1 wherein the heating element is a conductive refractory consisting of 5 to 40% by weight of carbon, less than 35% by weight of silicon oxide, 30 to 60% by weight of aluminum oxide, 3 to 50% by weight of zirconium oxide, and inevitable impurities. Or the mold described in 2. (5) The mold according to claim 1 or 2, wherein the heating element is a conductive refractory consisting of 5 to 45% by weight of carbon, 30 to 93% by weight of zirconium oxide, and inevitable impurities. (6) The lining material is a refractory material comprising: 5 to 40% by weight of carbon, less than 35% by weight of silicon oxide, 30 to 60% by weight of aluminum oxide, 3 to 50% by weight of zirconium oxide, and unavoidable impurities. 5
A mold described in any of the following. (7) Claims 1 to 5 wherein the lining material is a refractory consisting of 5 to 45% by weight of carbon, 30 to 93% by weight of zirconium oxide, and unavoidable impurities.
A mold described in any of the following. (8) Claim 1, wherein the lining material is a refractory consisting of 30 to 97% by weight of boron nitride, the remainder silicon nitride, and unavoidable impurities.
5. The mold according to any one of items 5 to 5. (9) The mold according to any one of claims 1 to 5, wherein the lining material is a refractory consisting of 30 to 97% by weight of boron nitride, the balance being aluminum nitride and unavoidable impurities. (10) The mold according to any one of claims 6 to 9, wherein the lining material is disposed near a solidification start point where initial solidification is formed within the mold. (11) The heating mold for continuous casting according to claim 1 or 2, wherein the cooling zone is a water-cooled mold with a graphite lining or lubricant plating. (12) In a method of continuously casting molten metal, a mold consisting of a heating zone and a cooling zone, the heating zone consisting of a heating element and a lining material is used, and the molten metal is injected by heating the heating element. A continuous casting method characterized by heating metal and casting the molten metal so that the solidification start point in the mold is below the molten metal surface. (13) In a method of continuously casting a composite material, a mold consisting of a heating zone and a cooling zone is used, and the heating zone is composed of a heating element and a lining material, and the molten material is injected by heating the heating element. A continuous casting method for composite materials, characterized by continuous casting by heating metal and a core material inserted into the center. (14) The method according to claim 12 or 13, using the mold according to any one of claims 6 to 10. (15) Claims 12 to 1 using the mold according to Claim 11.
4. The method described in any of 4. (16) Claims 12 to 1 in which the heating element is heated by induction heating using an electromagnetic induction coil or energization heating by direct energization.
5. The method described in any of 5.