KR20040027266A - Process for producing a semi-solid metallic slurry and apparatus thereof - Google Patents

Abstract

PURPOSE: A method and an apparatus for manufacturing semi-solid metal slurry are provided to obtain more fine and uniformed spheroidized grains, improve energy efficiency, reduce manufacturing cost, improve mechanical properties, simplify casting process, shorten manufacturing period of time, shortly manufacture semi-solid metal slurry having high quality and improve connection with succeeding processes. CONSTITUTION: The method for manufacturing semi-solid metal slurry comprises a step of arranging a slurry manufacturing container inside a certain space part; a step of impressing an electromagnetic field to the space part and injecting molten metal into the slurry manufacturing container; and a step of transferring the slurry manufacturing container to the outside of the space part, wherein the electromagnetic field is impressed to the space part before injecting molten metal into the slurry manufacturing container, wherein the step of arranging the slurry manufacturing container in the space part is performed after the electromagnetic field is impressed to the space part, wherein the electromagnetic field is impressed to the space part at the same time when the molten metal is injected into the slurry manufacturing container, wherein the electromagnetic field is impressed to the space part while the molten metal is being injected into the slurry manufacturing container, wherein the electromagnetic field is continuously impressed to the space part until a solid phase ratio of the molten metal in the slurry manufacturing container reaches 0.001 to 0.7.

Description

Process for producing a semi-solid metallic slurry and apparatus

The present invention relates to a method and apparatus for producing a reaction solid metal slurry, and more particularly, a method and apparatus for producing a solid reaction metal slurry in a solid-liquid coexistence state capable of obtaining fine and uniform spherical particles. It is about.

Metallic materials in solid-liquid coexistence state, that is, reaction solid metal slurry, refer to intermediate products of complex processing methods commonly known as reaction casting and thixocasting, which are liquid and spherical crystal grains at the temperature of the reaction solid region. In the mixed state at the proper ratio, thixotropic properties allow the metal material to be deformed by a small force, and have excellent fluidity and are easily molded and processed, such as a liquid phase. Here, the reactive solidification method refers to a processing method of producing a billet or a final molded product by casting or forging a metal slurry having a predetermined viscosity without solidification, and the semi-melt molding method is a method of regenerating a billet manufactured by a solidified method. Refers to a processing method in which the slurry is cast or forged and then made into a final product after reheating with a semi-molten metal slurry.

The reaction solid / semi-molten molding method has various advantages over the general molding method using molten metal such as casting or molten forging. For example, the slurry used in the reaction solid / semi-melt molding method has fluidity at a lower temperature than molten metal, so that the temperature of the die exposed to the slurry can be lower than that of molten metal, resulting in longer die life. Can be long. In addition, turbulence is less generated when the slurry is extruded along the cylinder, thereby reducing the incorporation of air during the casting process, thereby reducing the generation of pores in the final product. In addition, there is little solidification shrinkage, workability is improved, the mechanical properties and corrosion resistance of the product is improved, and the weight of the product is possible. Accordingly, it can be used as a new material in the automotive and aircraft industries, and electrical and electronic information communication equipment.

As described above, all of the reaction solid / semi-molding methods use a metal slurry in a reaction solid state. As described above, in the reaction solidification method, a slurry in which molten metal is cooled by a predetermined method is used. The slurry obtained by reheating the billet is used. Hereinafter, in the specification of the present invention, the reaction solid metal slurry partially dissolves at the temperature of the region where the liquid phase and the solid phase coexist between the liquid phase and the solid phase of the metal, that is, the temperature of the reaction phase of the metal. It means a metal material in a state remaining partially as a solid phase component, and refers to a slurry in a solid state prepared by the solidification molding method, that is, obtained by cooling from molten metal.

On the other hand, the conventional reaction solidification method is to make the spherical particles suitable for the reaction solidification by agitating the molten metal at a temperature below the liquidus line mainly to cool the molten metal, thereby destroying the dendrite crystal structure. As the method, mechanical stirring, electromagnetic stirring, gas bubbling, low frequency, high frequency or electromagnetic vibration, or agitation by electric shock are used.

For example, U. S. Patent No. 3,948, 650 discloses a method and apparatus for producing a liquid-solid mixture, in which the molten metal is cooled with vigorous stirring while solidifying. In addition, the disclosed solid metal slurry production apparatus is stirred by a stir bar while injecting a solid-liquid mixture into a vessel, which stirs the solid-liquid mixture having a predetermined viscosity to flow the resinous structure in the mixture. To crush or disperse the crushed dendritic structure. In the manufacturing method as described above, to obtain spherical crystals by grinding the dendritic crystal form already formed in the cooling process as a crystal nucleus, the cooling rate decreases and the manufacturing time increases due to the latent heat generated by the formation of the initial solidification layer And uneven crystal states due to temperature unevenness in the stirring vessel. In addition, in the case of the manufacturing apparatus, due to the limitations of mechanical agitation, the temperature distribution in the container is nonuniform, and because it operates in the chamber, the working time and subsequent processes have a very difficult limit.

U.S. Patent No. 4,465,118 discloses a method and apparatus for producing a semi-solid alloy slurry, in which a cooling manifold and a mold are sequentially provided inside an electromagnetic field applying means having a coil. The upper side is formed so that molten metal is continuously injected, and cooling water flows to the cooling manifold to cool the mold. In the method for producing a high-temperature alloy slurry, first, molten metal is injected from the upper side of the mold, and the molten metal passes through the mold to first form a solidification zone by a cooling manifold, where The magnetic field is applied by the electromagnetic field applying means, the cooling proceeds while crushing the dendritic tissue, and finally an ingot is formed from the bottom. By the way, also in such a manufacturing method and apparatus, the basic technical idea is that after solidification occurs, vibration is applied to break up the dendritic structure, which also has many problems in the above-described process and structure structure. In addition, in the case of the manufacturing apparatus, it is very difficult to control the state of the metal by forming the ingot continuously as the molten metal proceeds from the top to the bottom, or by continuously growing it, and the overall process control is difficult. In addition, there is a limit in that the temperature difference in the vicinity of the wall of the container and in the vicinity of the center of the container is severe because the container is already water-cooled at the stage before the electromagnetic field is applied.

In addition, as described below, the reaction solid / semi-melt molding method is present in various ways, but all of them have the same technical idea that the dendritic tissue is already formed and used as crystal nuclei as described above. I have it.

U.S. Patent 4,694,881 discloses a dendritic tissue formed from molten metal which is heated by heating the alloy so that all metal components in the alloy are in a liquid state, then cooling the resulting liquid metal to a temperature between the liquid and solid phase lines and then applying a shear force. Disclosed is a method of making thixotropic materials by fracture.

Japanese Laid-Open Patent Publication No. 11-33692 discloses that molten metal is injected into a container at or near the liquidus temperature or up to 50 ° above the liquidus temperature, and then at least a part of the molten metal is cooled to the liquidus temperature during cooling of the molten metal. At the time of the following, that is, the first time passing through the liquidus temperature, by applying a motion to the molten metal, for example by ultrasonic vibration, and then gradually cooled to prepare a metal slurry for reaction solid casting having a granular crystal metal structure A method is disclosed. However, also in this method, force such as ultrasonic vibration is used to break up the dendritic crystal structure formed in the initial stage of cooling. When the pouring temperature is set higher than the liquidus temperature, it is difficult to obtain a crystalline form of granules, and at the same time, it is difficult to rapidly cool the molten metal. In addition, the structure of the surface portion and the central portion becomes uneven.

In addition, in the method for forming a semi-molten metal disclosed in Japanese Patent Laid-Open No. 10-128516, the molten metal is injected into a container, and the vibration bar is deposited in the molten metal to vibrate in contact with the molten metal to vibrate in the molten metal. To give. Accordingly, the vibration force of the vibration bar is transmitted to the molten metal, thereby forming an alloy in a solid-liquid coexisting state having crystal nuclei below the liquidus temperature, and then cooling the molten metal in the container to a molding temperature indicating a predetermined liquidity rate. By holding for 30 to 60 minutes, the crystal nuclei are grown to obtain a semi-molten metal. However, the size of the crystal nuclei obtained by this method is about 100 mu m, the process time is also long, and there is a problem that it is difficult to apply to a container having a predetermined size or more.

US Pat. No. 6,432,160 discloses a method for producing a semi-molten metal slurry by precisely controlling cooling and stirring simultaneously. Specifically, after injecting molten metal into the mixing vessel, a stator assembly installed around the mixing vessel is operated to generate sufficient magnetomotive force to rapidly stir the molten metal in the vessel. The temperature of the molten metal is rapidly reduced by using a thermal jacket installed around the mixing vessel to precisely control the temperature of the vessel and the molten metal. When the molten metal is cooled, the molten metal is continuously stirred and adjusted in such a way as to provide rapid agitation when the solid fraction is low and to provide increased electromotive force as the solid phase increases.

As described above, the conventional methods and apparatuses for producing a reactive solid metal slurry utilize shear force to crush the dendritic crystal form already formed during cooling to form granular metal structures. That is, at least a part of the molten metal is applied only when the temperature is lowered below the liquidus line so as to avoid various problems such as decreasing the cooling rate and increasing the manufacturing time due to latent heat generation due to the formation of the initial solidification layer. it's difficult. In addition, it is difficult to obtain a uniform and fine structure as a whole due to the temperature non-uniformity in the container, and the non-uniformity of the tissue due to the temperature difference between the wall portion of the container and the center of the center is not achieved unless the temperature of injection of molten metal into the container is controlled. Will be further increased.

The present invention is to solve the problems as described above, to obtain finer and more uniform spheroidized particles and at the same time can realize the advantages of improved energy efficiency, reduced manufacturing costs, improved mechanical properties, simplified casting process and shorter manufacturing time It is an object of the present invention to provide a method and apparatus for producing a reactive solid metal slurry.

Another object of the present invention is to provide a method and apparatus for producing a reaction solid metal slurry capable of producing a high quality reaction solid metal slurry in a short time and having good connection with subsequent processes.

1 is a graph showing a method for producing a reaction solid metal slurry of the present invention,

2 and 3 is a schematic view showing a reaction apparatus for producing a slurry slurry metal according to an embodiment of the present invention,

Figure 4 is a cross-sectional view showing another embodiment of the slurry manufacturing vessel of the reaction apparatus of the slurry metal slurry of the present invention,

5 is a schematic view showing a reaction apparatus for producing a slurry slurry metal according to another embodiment of the present invention;

Figure 6 is a schematic view showing a reaction apparatus for producing a slurry metal slurry according to another embodiment of the present invention,

7 is a schematic operation state diagram for explaining the operation of the manufacturing apparatus according to FIG.

Figure 8 is a schematic view showing a reaction apparatus for producing a slurry metal slurry according to another embodiment of the present invention.

In order to achieve the above object, the present invention comprises the steps of disposing a slurry production vessel in a predetermined space portion, applying an electromagnetic field to the space portion, injecting molten metal into the slurry production vessel, and the slurry production vessel It provides a method for producing a reaction solid metal slurry comprising the step of transferring to the outside of the space.

According to another feature of the invention, the application of the electromagnetic field may be made before injecting molten metal into the slurry production vessel. At this time, the step of disposing the slurry production vessel in the space may be made after the electromagnetic field is applied to the space.

According to another feature of the invention, the application of the electromagnetic field may be made at the same time as the molten metal is injected into the slurry production vessel.

According to another feature of the invention, the application of the electromagnetic field may be made during the injection of molten metal into the slurry production vessel.

According to another feature of the invention, the application of the electromagnetic field may be such that at least until the solid phase rate of the molten metal in the slurry production container reaches 0.001 to 0.7, preferably lasts to 0.001 to 0.4 It may be to, and more preferably, to last until 0.001 to 0.1.

According to another feature of the invention, after the injection of molten metal into the slurry production vessel may further comprise the step of cooling the slurry production vessel.

According to another feature of the invention, the step of cooling the slurry production vessel may include the step of cooling the molten metal of the slurry production vessel until a solid phase rate of 0.1 to 0.7.

According to another feature of the invention, the step of cooling the slurry production vessel may be to cool the molten metal of the slurry production vessel at a rate of 0.2 ℃ / s to 5.0 ℃ / s, preferably the slurry production The molten metal of the vessel may be cooled at a rate of 0.2 ℃ / s to 2.0 ℃ / s.

The present invention also provides at least one stirring unit for providing an electromagnetic field to the space and having a space therein, and at least one slurry production vessel accommodated in the space, in order to achieve the object as described above, By lifting and lowering the slurry production vessel, a reaction unit for producing a slurry metal slurry comprising a drive unit for accommodating the slurry production vessel into the space portion, and an injection portion for injecting a liquid molten metal into the slurry production vessel to provide.

According to another aspect of the present invention, the stirring portion may apply an electromagnetic field to the space portion before the molten metal is injected into the slurry production vessel.

According to another feature of the present invention, the stirring portion may be injected with an molten metal into the slurry production vessel and may apply an electromagnetic field to the space portion.

According to another feature of the invention, the stirring unit may apply an electromagnetic field to the space portion while the molten metal is injected into the slurry production vessel.

According to another feature of the present invention, the driving unit may be lifted out of the space portion by raising the slurry production vessel after a predetermined time after the molten metal is injected into the slurry production vessel.

According to another feature of the present invention, the driving unit may be provided to horizontally move the slurry production vessel.

According to another feature of the invention, the drive unit is provided with a rotating plate on the edge of the slurry production vessel is seated, the molten metal is injected into the slurry production vessel after the predetermined time after the slurry production vessel is lowered and rotated to It can be separated out of the space portion.

According to another feature of the invention, the drive unit is provided to be horizontally moved along the rail, the molten metal is injected into the slurry production vessel after the predetermined time after the slurry production vessel is lowered horizontally moved along the rail It can be separated out of the space portion.

According to another feature of the invention, the application of the electromagnetic field by the stirring unit may be such that at least until the solid phase rate of the molten metal injected into the slurry production container reaches 0.001 to 0.7, preferably, 0.001 It may be allowed to continue until to 0.4, and more preferably, it can be continued until 0.001 to 0.1.

According to another feature of the present invention, a temperature control device may be further added to the slurry production vessel.

According to another feature of the invention, the temperature control device may be provided with at least one of a cooling device installed in the slurry production vessel and an electric heater installed outside the slurry production vessel.

According to another feature of the invention, the temperature control device of the slurry production vessel can cool the molten metal in the slurry production vessel until reaching a solid phase rate of 0.1 to 0.7.

According to another feature of the invention, the temperature control device of the slurry production vessel can cool the molten metal in the slurry production vessel at a rate of 0.2 ℃ / s to 5.0 ℃ / s.

According to another feature of the invention, the temperature control device of the slurry production vessel can cool the molten metal in the slurry production vessel at a rate of 0.2 ℃ / s to 2.0 ℃ / s.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

First, referring to Figure 1 looks at the method for producing a reaction solid metal slurry of the present invention.

Unlike what can be seen in the above-described prior arts, the method for producing a reactive solid metal slurry of the present invention performs stirring by an electromagnetic field before the injection of molten metal into the slurry preparation container is completed. That is, before the molten metal is injected into the slurry production vessel, the molten metal is injected into the slurry production vessel, or the stirring is performed by the electromagnetic field during the injection of the molten metal into the slurry production vessel, thereby generating the initial dendritic structure. To block. In this case, ultrasonic waves may be used instead of the electromagnetic field as the stirring. This will be described in more detail as follows.

An empty slurry production container is disposed without pouring molten metal into a predetermined space, and an electromagnetic field is applied to the space while the slurry production container is empty, and molten metal is poured. At this time, the application of the electromagnetic field is made of an intensity capable of stirring the molten metal.

As can be seen in Figure 1, molten metal is injected into the slurry preparation vessel at the pouring temperature Tp. Of course, as described above, the slurry production vessel at this time may be in a state in which an electromagnetic field is applied and stirring is performed. The step of disposing the slurry manufacturing vessel in the space may be made after the electromagnetic field is applied to the space. However, the present invention is not necessarily limited thereto, and the electric field agitation may be performed simultaneously with molten metal pouring, or electromagnetic agitation may be performed while the molten metal is pouring.

As the electromagnetic field is stirred before the injection of molten metal into the slurry production container is completed, the molten metal does not grow from the initial solidification layer in the inner wall of the low temperature container into the dendritic structure, and thus, fine crystals throughout the container. The nuclei are generated at the same time, and the entire molten metal in the container can be rapidly cooled evenly below the liquidus temperature to generate a plurality of crystal nuclei simultaneously.

This is due to active initial stirring by injecting an electromagnetic field before or at the same time as injecting molten metal into the slurry container, so that the inner molten metal and the molten metal on the surface are agitated well so that heat transfer in the molten metal occurs quickly. This is because the initial solidification layer formation at is suppressed. In addition, convective heat transfer between the well-stirred molten metal and the low temperature vessel inner wall is increased to rapidly cool the temperature of the entire molten metal. That is, the injected molten metal is dispersed into the dispersed particles by electromagnetic field stirring at the same time as the injection, and the dispersed particles are evenly distributed in the container as crystal nuclei, so that a temperature difference does not occur throughout the container. On the other hand, according to the prior art, the injected molten metal is brought into contact with the inner wall of the low temperature container to grow into dendritic crystals in the initial solidification layer in the inner wall of the container by rapid convection heat transfer.

This principle may be explained in terms of latent heat of solidification, that is, no initial solidification of the molten metal at the wall of the slurry production vessel occurs, so that no latent heat of solidification occurs, so that cooling of the molten metal is only melted. This is possible only with the release of heat equivalent to the specific heat of the metal (only about 1/400 of the latent heat of solidification). Therefore, as in the prior art, the formation of dendritic crystals, which is an initial solidification layer, which is often generated in the wall portion of the container, does not occur, and the overall temperature of the molten metal in the container is reduced uniformly and rapidly. . The time it takes is only a short time of about 1 to 10 seconds after the injection of molten metal. As a result, a large number of crystal nuclei are uniformly generated throughout the molten metal in the container, and the distance between the crystal nuclei becomes very short due to the increase in the nuclei formation density, so that dendritic crystals do not form and grow independently to form spherical particles. do.

The same is true when an electromagnetic field is applied while molten metal is being poured. In the case where an electromagnetic field is applied while molten metal is being poured, although the initial solidification layer is formed on the inner wall of the container, the initial solidification layer no longer grows to the dendritic structure by stirring the electromagnetic field during the injection process. You will not lose. The effects thereafter are as described above.

At this time, it is preferable that the pouring temperature Tp of the molten metal is maintained at a temperature (melting superheat degree, melt superheat = 0 ° C. to 100 ° C.) between a liquidus temperature and a liquidus temperature + 100 ° C. As described above, since the entire inside of the container containing molten metal is uniformly cooled, there is no need to cool the liquidus temperature near the liquidus temperature before injecting the molten metal into the slurry production vessel and maintain the temperature of about 100 ° C above the liquidus temperature. This is because too much. On the other hand, in the conventional method of applying an electromagnetic field to the container when the molten metal is injected into the container and a part of the molten metal becomes below the liquidus line, the initial solidification layer is formed on the wall of the container, and the latent heat of solidification is generated. Since silver is about 400 times the specific heat, it takes a lot of time for the temperature of the molten metal of the entire container to drop. Therefore, in this conventional method, it was common to cool the temperature of the molten metal to a temperature of about 50 ° C. above the liquidus level or to inject it into a container.

In addition, in the present invention, as shown in FIG. 1, the electromagnetic field agitation is performed when the temperature of the molten metal in the slurry production vessel is lowered to below the liquidus temperature (T ₁ ), that is, the solid phase rate is at least partially. If any predetermined nuclei are generated after about 0.001, there is no problem in terminating at any time. That is, the electromagnetic field may be applied until the molten metal is injected into the slurry preparation container and the molten metal is cooled, and the stirring of the electromagnetic field may be stopped before the subsequent die casting process or forming process such as a hot forging process. This is because the magnetic field agitation at the stage of crystal grain growth around the crystal nuclei does not affect the characteristics of the metal slurry to be prepared because the crystal nuclei are evenly distributed throughout the slurry production vessel. Therefore, such electromagnetic field stirring can be continued at least until the solid phase rate of the molten metal reaches any time of 0.001 to 0.7.

However, since the duration of the electromagnetic agitation can be considered in terms of energy efficiency, according to a preferred embodiment of the present invention, at least until the solid phase rate of the molten metal in the slurry production vessel becomes 0.001 to 0.4. And, more preferably, it can be continued until the solid phase rate of the molten metal is 0.001 to 0.1.

As described above, after the electromagnetic agitation is applied, the slurry production vessel is transferred to the outside of the space portion to which the electromagnetic field is applied to be connected to a subsequent process. That is, it transfers to a die casting process, a hot forging process, or a billet manufacturing process which is a subsequent process, and is shape | molded. As described above, the transfer of the slurry production vessel may proceed regardless of the termination of the electromagnetic field. First, after the application of the electromagnetic field is terminated, the slurry production vessel may be transferred, and the electromagnetic field is applied to the space. It is also possible to leave the slurry production vessel outside the space portion in the state.

On the other hand, an electromagnetic field is applied before the injection of molten metal into the slurry production vessel is completed, and after forming a uniform distribution of crystal nuclei, the slurry production vessel is cooled to accelerate the growth of the generated crystal nuclei. Therefore, this cooling step may be performed when the molten metal is injected into the slurry production vessel.

As described above, the electromagnetic field may be continuously applied even during this cooling step. Thus, this cooling step may be made when the slurry production vessel is in the space portion to which the electromagnetic field is applied, that is, before leaving the slurry production vessel from the space portion. Accordingly, after the metal slurry in the reaction state is prepared in the slurry production vessel located in the space part, it is to be used immediately in a subsequent forming process.

On the other hand, such a cooling step can be continued until the molding process, which is a subsequent process, according to a preferred embodiment of the present invention, it is also possible to maintain the cooling step until the time (t2) molten metal reaches a solid phase rate of 0.1 to 0.7. . At this time, the cooling rate of the molten metal may be about 0.2 ℃ / sec to 5.0 ℃ / sec, which may also be 0.2 ℃ / sec to 2.0 ℃ / sec depending on the distribution of crystal nuclei and fineness of the particles. .

According to this method, a metal slurry in a solid state of a solid state having a predetermined solid phase rate can be prepared, and then transferred directly to a billet manufacturing process to prepare a billet for semi-melting molding by quenching, or by die casting, forging, or press working. It can also be transferred to form a final product.

According to the present invention as described above, it is possible to significantly shorten the time for producing the metal slurry in the reaction solid state, the metal material in the form of a metal slurry with a solid phase of 0.1 to 0.7 from the time of injection of the molten metal into the container The time required to form the time is only 30 seconds to 60 seconds. When the product is molded using the prepared metal slurry, a uniform and dense spherical crystal structure can be obtained.

The manufacturing method as described above can be realized by the preferred embodiment of the present invention according to Figs.

As shown in FIG. 2, the apparatus for manufacturing a slurry for slurry according to the preferred embodiment of the present invention includes a space 13 inside, and the coil device 11 for applying an electromagnetic field is the space 13. ), The stirring unit (1) provided to surround the at least one slurry production vessel (2) accommodated in the space portion 13 in the stirring unit (1), and the slurry production vessel (2) at least And a drive unit 3 for injecting molten metal into the slurry production vessel 2 and a control unit 5 for controlling them.

The stirring portion 1 is provided on the hollow base plate 14, which is supported by a separate support member 15 so as to be installed above a predetermined height from the ground. An upper portion of the base plate 14 is provided with an electromagnetic field applying coil device 11 around the opening 14a. The coil device for applying an electromagnetic field has a predetermined portion having a space 13 therein. It may be supported by the frame 12. The coil device for applying the electromagnetic field 11 is electrically connected to the control unit 5, the slurry production vessel (2) accommodated in the space 13 by applying an electromagnetic field of a predetermined strength toward the space 13 The molten metal inside is electromagnetically stirred. Although not shown in the drawings, the stirring unit may be an ultrasonic stirring device.

The slurry production vessel 2 may be provided with a metal material, may be provided with an insulating material, the size thereof may be any shape that can be accommodated in the space 13 of the stirring section (1). It is preferable to use the slurry manufacturing container 2 higher than the temperature of the molten metal in which melting | fusing point is accommodated, and the step part 21 may be provided so that a container may not flow in a bottom part. Although not shown in the drawings, a separate thermocouple may be built in, and the thermocouple may be connected to the controller 5 to transmit temperature information to the controller 5.

In addition, the slurry manufacturing container 2 may be formed to accommodate only molten metal, as shown in FIGS. 2 and 3, but as shown in FIG. 4, the temperature control device 20 is further provided. You may. The temperature control device 20 may be provided with a cooling device and a heating device. According to a preferred embodiment of the present invention as shown in FIG. 4, the coolant pipe 23 is installed in the container body 22. By the cooling device, although not shown, it is possible to further install an electric heater device according to the heat transfer coil to the outside of the container body 22. In addition, the cooling device may also be separately attached to the cooling water pipe 23 in the form of a water jacket on the outside of the container body 22. These cooling water pipes 23 and heaters can be mounted alone or in combination in the slurry production vessel 2, whereby the molten metal contained in the vessel can be cooled at an appropriate rate. This slurry production vessel 2 can of course be applied as is to all embodiments of the present invention to be described below.

On the other hand, the drive part 3 which raises and lowers the said slurry manufacturing container 2 accommodates the said slurry manufacturing container 2 in the said space part 13, and separates it out of the space part 13 outside. The drive unit 3 is provided with a drive motor, a gear device or a hydraulic cylinder, and the like, and is electrically connected to the control unit 5, and from the power unit 31 inside the space 13. And a piston 32 which is linearly reciprocated by the power unit 31 and a seating plate 33 which is connected to an end of the piston 32 and is located inside the space 13. have. The slurry manufacturing container 2 is seated on the seating table 33.

The injection portion 4 is to inject a liquid molten metal into the slurry production vessel (2) when the slurry production vessel (2) is lifted by the drive unit 3 and accommodated in the space (13), Ordinary ladle (ladle) electrically connected to the control unit 5 may be used, as well as any other thing as long as it can inject molten metal into the slurry production vessel (2).

According to a preferred embodiment of the present invention configured as described above, first, as shown in Figure 2, by operating the drive unit 3 accommodates the slurry production vessel (2) in the space 13, then stirring In the section 1, the electromagnetic field applying device 11 applies an electromagnetic field in the space 13 at a predetermined frequency and intensity. The accommodation of the slurry manufacturing container 2 in the space 13 may be made after an electromagnetic field is applied to the space 13. Then, molten metal melted in a separate electric furnace or the like is injected into the slurry production vessel 2 under the influence of the electromagnetic field by the injection portion 4. In this case, the application of the electromagnetic field may be made before the injection of the molten metal, but is not limited thereto, and as described above, may be performed simultaneously with the injection of the molten metal or during the injection of the molten metal.

After the predetermined time after the molten metal is injected into the slurry production container 2, the driving unit 3 raises the slurry production container 2 to be separated from the space 13 outside, as shown in FIG. 3. Replace with a new slurry container by a transfer device such as a robot. The replaced slurry production vessel 2 is cooled at a predetermined rate until a solid phase rate of 0.1 to 0.7 is reached to produce a reaction solid metal slurry. At this time, the cooling rate may be a rate of 0.2 ℃ / sec to 5.0 ℃ / sec, as described above, more preferably may be a rate of 0.2 ℃ / sec to 2.0 ℃ / sec. The cooling of the slurry production container 2 may be performed before the slurry production container is replaced, that is, before the slurry production container 2 is separated out of the space 13 by the driving part 3, and cooling is performed. After completion, the slurry production vessel 2 may be separated out of the space and replaced with a new container.

On the other hand, the application of such an electromagnetic field can be continued until the cooling is completed, that is, the electromagnetic field continues until the slurry manufacturing container 2 is separated out of the space 13 by the drive unit (3). May be applied. The application of the electromagnetic field can last until at least the solid phase is 0.001 to 0.7. However, as described above, in the energy efficiency aspect, the electromagnetic field applying device 11 may continue until at least the solid phase ratio is about 0.001 to 0.4 after injection of molten metal, and more preferably, the solid phase ratio is 0.001 to 0.4. It can last until about 0.1. The time to become such a solid phase rate can be found beforehand by experiment. As described above, the cooling may continue while the electromagnetic field is applied.

As can be seen in Figure 5, the apparatus for producing a solid metal slurry may be formed to have two or more slurry production containers (2a) (2b) to work at the same time. Reactor solid metal slurry production apparatus according to another preferred embodiment of the present invention according to Figure 5 is the same as the above-described embodiment and its basic configuration is omitted detailed description. However, when the two or more slurry manufacturing containers (2a) (2b) is provided, the seating table (33a) (33b) is disposed on the seating plate 34, these seating table (33a) (33b) is the slurry production Preferably, the containers 2a and 2b are formed high so as to correspond to the height of the space 13 so as to be separated out of the upper side of the stirring section 1.

Figure 6 shows a reaction apparatus for producing a metal slurry according to another preferred embodiment of the present invention, the difference from the above embodiment is that the drive unit 3 can move the slurry production vessel (2) horizontally will be. Hereinafter, description will be made mainly on the parts that are distinguished from the above-described embodiment.

In the reaction apparatus for producing a metal slurry according to still another preferred embodiment of the present invention as shown in FIG. 6, the rotary plate 35 is mounted at the end of the piston 32 of the driving unit 3. At this time, the piston 32 is coupled to approximately the middle portion of the rotating plate 35. At least one seating table 33a, 33b is mounted at the edge of the rotating plate 35, and slurry production vessels 2a, 2b are seated on the seating boards 33a, 33b. And the power unit 31 is provided not only to raise and lower the piston, but also to rotate. Therefore, the reaction solid metal slurry production apparatus as shown in Figure 6 is to move the slurry production vessel horizontally by the rotation of the rotating plate 35 to leave the space portion outside. The operation of the reaction metal slurry manufacturing apparatus according to another preferred embodiment of the present invention will be described in more detail with reference to FIG.

FIG. 7 schematically shows an apparatus for producing a slurry metal slurry according to another preferred embodiment of the present invention according to FIG. 6, and shows a process sequence sequentially. First, as shown in FIG. 7A, the piston 32 is raised to accommodate the first slurry production container 2a in the space portion 13, and then the electromagnetic field applying device 11 of the stirring portion 1 is provided. The electromagnetic field is applied to the space 13 by the following. At this time, the first slurry production container 2a may be accommodated in the space portion while the electromagnetic field is applied.

In this state, as shown in FIG. 7B, the molten metal is injected into the first slurry production container 2a by the injection container 4, and the sieve is maintained while applying an electromagnetic field for a predetermined time. In this case, as described above, the electromagnetic field may be applied simultaneously with the injection of the molten metal, or the electromagnetic field may be applied while the molten metal is being injected.

Then, as can be seen in Figure 7 (c), the piston 32 is lowered so that the first slurry production container (2a) is pulled out of the space portion 13, as can be seen in (d), The piston 32 is rotated to change its position with the second slurry production container 2b which is an empty container. The first slurry production container 2a cools the metal therein to a predetermined solid phase rate at a predetermined cooling rate to produce a slurry, and raises the piston 32 again as shown in FIG. The same process is repeated to the second slurry production container (2b). At this time, the first slurry production container (2a) is transferred by a transfer means such as robot 6 to perform a separate subsequent molding process.

According to the apparatus for producing a high solid metal slurry, it is possible to continuously manufacture a large amount of high solid metal slurry, and further increase the linkage with subsequent processes, thereby improving the efficiency of the entire process.

Meanwhile, as described above, the method for horizontally moving the slurry production container may be variously implemented. For example, as shown in FIG. 8, the driving unit 3 may be horizontally moved along a separate rail 36. have.

The manufacturing method and apparatus of the present invention are universal for reaction solidification methods of various metals / alloys such as aluminum or alloys thereof, magnesium or alloys thereof, zinc or alloys thereof, copper or alloys thereof, or iron or alloys thereof. Of course, it can be applied as. In addition, the metal material thus produced has a fine spherical shape with an average particle diameter of 10 to 60 µm, and its distribution is also uniform.

As described above, according to the present invention, a uniform and fine spherical structure can be obtained as compared with the conventional one, so that the mechanical properties of the alloy can be improved.

In addition, only a short time of stirring at a temperature higher than the liquidus can significantly increase the nucleation density on the wall of the container, thereby realizing spheroidization of the particles.

In addition, the reaction apparatus of the high-metallurgical slurry production apparatus of the present invention can simplify the whole process and greatly shorten the electromagnetic stirring time, so that the energy consumption required for stirring is shortened, and the molding time of the product is also shortened. Has

In addition, it is also highly compatible with subsequent processes and can greatly improve yield.

In the present specification, the present invention has been described with reference to limited embodiments, but various embodiments are possible within the spirit of the present invention. In addition, although not described, equivalent means will also be referred to as incorporated in the present invention. Therefore, the true scope of the present invention will be defined by the claims.

Claims (28)

Disposing a slurry production container in a predetermined space; Applying an electromagnetic field to the space and injecting molten metal into the slurry container; And And transporting the slurry production vessel to the outside of the space portion. The method of claim 1, The application of the electromagnetic field is a method for producing a reaction solid metal slurry, characterized in that before the molten metal is injected into the slurry production vessel. The method of claim 2, Disposing the slurry production vessel in the space portion is a method for producing a reactive metal slurry, characterized in that the electromagnetic field is applied to the space portion. The method of claim 1, The application of the electromagnetic field is a method of producing a reaction solid metal slurry, characterized in that at the same time as the molten metal is injected into the slurry production vessel. The method of claim 1, The application of the electromagnetic field is made in the middle of injecting a molten metal into the slurry production vessel. The method of claim 1, The application of the electromagnetic field is a method for producing a solid metal slurry, characterized in that at least until the solid phase of the molten metal in the slurry production container reaches 0.001 to 0.7. The method of claim 6, The application of the electromagnetic field lasts at least until the solid phase rate of the molten metal in the slurry production container reaches 0.001 to 0.4. The method of claim 7, wherein The application of the electromagnetic field lasts at least until the solid phase rate of the molten metal in the slurry production container reaches 0.001 to 0.1. The method according to any one of claims 1 to 8, And injecting molten metal into the slurry production vessel, and then cooling the slurry production vessel. The method of claim 9, Cooling the slurry production vessel comprises the step of cooling the molten metal of the slurry production vessel until reaching a solid phase rate of 0.1 to 0.7. The method of claim 9, The cooling step of the slurry production vessel is a method for producing a reactive metal slurry, characterized in that for cooling the molten metal of the slurry production vessel at a rate of 0.2 ℃ / s to 5.0 ℃ / s. The method of claim 11, Cooling the slurry production vessel is a method for producing a reactive metal slurry, characterized in that for cooling the molten metal of the slurry production vessel at a rate of 0.2 ℃ / s to 2.0 ℃ / s. At least one stirring part having a space inside and applying an electromagnetic field to the space; At least one slurry production vessel accommodated in the space portion; A drive unit for lifting and lowering the slurry production vessel to accommodate the slurry production vessel into the space; And Reactor solid metal slurry production apparatus comprising a; injection portion for injecting a molten metal of the liquid phase into the slurry production vessel. The method of claim 13, The stirring unit is a device for producing a reactive metal slurry, characterized in that to apply an electromagnetic field to the space portion before the molten metal is injected into the slurry production vessel. The method of claim 13, The stirring unit is a molten metal is injected into the slurry production vessel and at the same time the apparatus for producing a reactive metal slurry, characterized in that to apply an electromagnetic field to the space. The method of claim 13, The stirring unit is a reaction apparatus for producing a slurry metal slurry, characterized in that for applying the electromagnetic field to the space portion while the molten metal is injected into the slurry production vessel. The method of claim 13, The driving unit is a reaction metal slurry manufacturing apparatus, characterized in that the molten metal is injected into the slurry production vessel and after the predetermined time to raise the slurry production vessel to leave the space portion outside. The method of claim 13, The driving unit is a reaction high metal slurry production apparatus, characterized in that provided to move the slurry production vessel horizontally. The method of claim 18, The driving unit is provided with a rotating plate on which the slurry production vessel is seated at an edge thereof, and after the molten metal is injected into the slurry production vessel, the slurry production vessel is lowered and rotated after a predetermined time so as to leave the space outside. Reactor high metal slurry manufacturing apparatus. The method of claim 18, The driving unit is provided to be movable horizontally along the rail, the molten metal is injected into the slurry production vessel and after the predetermined time, the slurry production vessel is lowered and then moved horizontally along the rail to move out of the space portion. Reactor solid metal slurry production apparatus. The method according to any one of claims 13 to 20, The application of the electromagnetic field by the stirring unit is at least a solid metal slurry production apparatus, characterized in that until the solid phase of the molten metal injected into the slurry production container reaches 0.001 to 0.7. The method of claim 21, The application of the electromagnetic field by the stirring unit is a reaction solid metal slurry production apparatus, characterized in that at least until the solid phase of the molten metal injected into the slurry production container reaches 0.001 to 0.4. The method of claim 22, The application of the electromagnetic field by the stirring unit is at least a solid metal slurry production apparatus, characterized in that until the solid phase rate of the molten metal injected into the slurry production container reaches 0.001 to 0.1. The method according to any one of claims 13 to 20, Reactor high metal slurry production apparatus, characterized in that the temperature control device is further added to the slurry production vessel. The method of claim 24, The temperature control device is a reaction apparatus for producing a metal slurry, characterized in that provided with at least one of a cooling device installed in the slurry production vessel and an electric heater installed outside the slurry production vessel. The method of claim 24, The temperature control device of the slurry production vessel is a reaction solid metal slurry production apparatus, characterized in that for cooling the molten metal in the slurry production vessel until a solid phase rate of 0.1 to 0.7. The method of claim 24, The temperature control device of the slurry production vessel is a reactive metal slurry production apparatus, characterized in that for cooling the molten metal in the slurry production vessel at a rate of 0.2 ℃ / s to 5.0 ℃ / s. The method of claim 27, The temperature control device of the slurry production vessel is a reaction metal slurry production apparatus, characterized in that for cooling the molten metal in the slurry production vessel at a rate of 0.2 ℃ / s to 2.0 ℃ / s.