JP2004114153A - Method and apparatus for producing metallic material in solid-liquid coexisting state and method and apparatus for producing semi-solidified metallic slurry - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for producing semi-solidified metallic slurry with which further fine and uniform spheroidized grains are obtained and, the improvement of energy efficiency, the saving of producing cost, the improvement of mechanical properties, the simplification of casting process and the shortening of producing time can be realized. <P>SOLUTION: Molten metal is poured into a slurry-producing vessel disposed in a space part impressing electromagnetic field. The slurry-producing vessel is transported to out of the space part and the molten metal in the slurry-producing vessel is made to be the semi-solidified metallic slurry. Grain distribution having wholly uniform and fine spheroidized structure can be obtained in this slurry, and the mechanical properties of alloy can be improved. Nuclei-generating density on the wall surface of the slurry-producing vessel is remarkably increased only by stirring for short time at higher temperature than the liquidus and the grains can be spheroidized. The high quality semi-solidified metallic slurry can be produced for short time and has excellent cooperation property with the following process. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of manufacturing a solid-liquid coexisting metal material by applying an electromagnetic field to a molten metal to form a solid-liquid coexisting metal material, a manufacturing apparatus thereof, a method of manufacturing a semi-solid metal slurry, and a manufacturing apparatus thereof.
[0002]
[Prior art]
A metal material in a solid-liquid coexistence state, that is, a semi-solid or semi-molten metal slurry, usually refers to an intermediate product of a composite processing method such as a semi-solid molding method (Reocasting) and a semi-solid molding method (Thixocasting). In a state where the liquid phase and the spherical crystal grains are mixed at an appropriate ratio, it can be deformed by a small force due to thixotropic property, and has excellent fluidity and can be easily formed like a liquid phase. It is a metallic material in a state.
[0003]
Here, the semi-solid molding method is a processing method for producing a billet or a final molded product by casting or forging a slurry having a predetermined viscosity without being completely solidified. Further, the semi-solid molding method is a processing method in which a billet produced by a semi-solid molding method is reheated to a slurry in a semi-molten state, and then this slurry is cast or forged to produce a final product.
[0004]
Such a semi-solid or semi-solid molding method has various advantages as compared with a general molding method using a molten metal such as casting or melt forging. For example, the slurries used in these semi-solid or semi-solid molding processes have a lower fluidity than the molten metal, so that the temperature of the die exposed to the slurry can be further reduced than in the case of the molten metal. The lifespan is extended.
[0005]
Also, when the slurry is extruded along the cylinder, turbulence is less generated, so that air is not mixed in during the casting process, thereby reducing the generation of pores in the final product. In addition, the solidification shrinkage is small, the workability is improved, the mechanical properties and corrosion resistance of the product are improved, and the product can be reduced in weight. As a result, it can be used as a new material in the automotive and aircraft industries, electrical and electronic information communication equipment, and the like.
[0006]
Thus, in all of these semi-solid or semi-solid molding methods, a metal slurry in a semi-solid state is used. However, as described above, the semi-solid molding method uses a slurry obtained by cooling a molten metal by a predetermined method. In the semi-solid molding method, a slurry obtained by reheating a solid billet is used. Here, the semi-solid metal slurry is a region in which the liquid phase and the solid phase coexist between the liquidus and solidus of the metal, that is, the crystal grain boundaries inside the metal at the temperature of the semi-solidification region of the metal. A semi-solid material that is produced by a semi-solid molding method, that is, a semi-solid obtained by cooling from a molten metal, that is, a metal material that is partially dissolved and partially remains as a solid phase component. Slurry of state.
[0007]
On the other hand, in the conventional semi-solid molding method, spherical particles adapted to semi-solid molding by cooling the molten metal mainly by stirring at a temperature below the liquidus line and crushing the dendritic crystal structure already generated. How to make it. As the stirring method, a mechanical stirring method, an electromagnetic stirring method, gas bubbling, low frequency, high frequency or electromagnetic wave vibration, or a stirring method using an electric shock were used.
[0008]
As a method of producing a liquid-solid mixture, the molten metal is cooled while being vigorously stirred during solidification. Further, a production apparatus for producing the liquid-solid mixture mixes the solid-liquid mixture into a container by pouring the mixture with a stirring rod, which stirs the solid-liquid mixture having a predetermined viscosity. Crushing the dendritic structures in the mixture or dispersing the crushed dendritic structures.
[0009]
However, in the method for producing the liquid-solid mixture, the dendritic crystal morphology already formed in the cooling process is pulverized, and the pulverized dendritic crystal is used as a crystal nucleus to obtain a spherical crystal. There are many problems such as a reduction in cooling rate and an increase in production time due to generation of latent heat due to the formation of a layer, and a non-uniform crystal state due to non-uniform temperature in a stirred vessel. Also, in the case of a manufacturing apparatus for manufacturing the liquid-solid mixture, the temperature distribution in the container is not uniform due to the limitation of mechanical stirring, and the working time and subsequent processes are required to operate in the chamber. Has a very difficult limit (for example, see Patent Document 1).
[0010]
The apparatus for producing a semi-solid alloy slurry is provided with a cooling manifold and a mold sequentially inside an electromagnetic field applying means with a coil. The upper side of the mold is formed so that molten metal is continuously poured, and cooling water is supplied to the cooling manifold to cool the mold. Furthermore, according to the method for producing a semi-solid alloy slurry by the semi-solid alloy slurry production apparatus, first, a molten metal is poured from the upper side of a mold, and the molten metal is passed through the mold by a cooling manifold. A solid-phased region is formed. Here, a magnetic field is applied by an electromagnetic field applying means, and while the dendritic tissue is crushed, cooling proceeds, and an ingot is formed from below (for example, see Patent Document 2).
[0011]
However, even in such a method and apparatus for producing a semi-solid alloy slurry, the basic technical idea is to crush the dendritic tissue by applying vibration after solidification has occurred. Has many problems in the process and organizational structure. Also, in the case of the above-mentioned semi-solid alloy slurry manufacturing apparatus, the molten metal continuously forms an ingot while proceeding from the upper part to the lower part. Process control is difficult. Further, since the container is already water-cooled before the application of the electromagnetic field, the temperature difference between the vicinity of the container wall and the center is large.
[0012]
Further, as a method of manufacturing a semi-solid molded material, after heating the alloy so that all metal components in the alloy exist in a liquid state, the obtained liquid metal is heated to a temperature between a liquidus line and a solidus line. Cooling. Thereafter, a semi-solid material is manufactured by breaking a dendritic structure formed from a molten metal cooled by applying a shearing force (for example, see Patent Document 3).
[0013]
In addition, as a method of producing a metal slurry for semi-solid casting, molten metal is poured into a container at a temperature near the liquidus temperature or a temperature higher than the liquidus temperature up to 50 ° C. Thereafter, at the time when at least a part of the molten metal becomes lower than the liquidus temperature in the process of cooling the molten metal, that is, when the molten metal first passes through the liquidus temperature, the molten metal moves to the molten metal by ultrasonic vibration, for example. Add. Furthermore, a metal slurry for semi-solid casting having a metal structure in the form of a grain phase crystal is manufactured by gradually cooling the molten metal after applying a motion to the molten metal (for example, see Patent Document 4).
[0014]
However, in the above-mentioned method for producing a metal slurry for semi-solid casting, a force such as ultrasonic vibration is used to crush a dendritic crystal structure formed at an early stage of cooling. Further, if the pouring temperature is higher than the liquidus temperature, it is difficult to obtain a crystal form of a granular phase, and at the same time, it is difficult to rapidly cool the molten metal. Further, the texture of the surface portion and the central portion becomes uneven.
[0015]
Furthermore, as a method of forming a semi-molten metal, after pouring the molten metal into a container, a vibrating bar is immersed in the molten metal and vibrated in a state of being in direct contact with the molten metal to vibrate the molten metal. I have. Specifically, by transmitting the vibration force of the vibration bar to the molten metal, an alloy having a crystal nucleus at a liquidus temperature or lower and in a solid-liquid coexisting state is formed. Thereafter, the molten nucleus is maintained in the container for 30 seconds or more and 60 minutes or less while being cooled to a molding temperature showing a predetermined liquidus ratio, thereby growing crystal nuclei to obtain a semi-molten metal. However, the size of the crystal nucleus obtained by this method is about 100 μM, the process time is considerably long, and it is difficult to apply the method to a container having a predetermined size or more (for example, see Patent Document 5).
[0016]
In addition, as a method for producing a semi-molten metal slurry, a semi-molten metal slurry is produced by precisely controlling cooling and stirring simultaneously. Specifically, after pouring the molten metal into the mixing vessel, a stator assembly provided around the mixing vessel is operated to generate a magnetomotive force sufficient to rapidly stir the molten metal in the vessel. In addition, the temperature of the molten metal is rapidly reduced using a thermal jacket provided around the mixing vessel and acting to precisely control the temperature of the vessel and the molten metal. As the molten metal cools, the molten metal continues to be agitated, adjusted to provide fast agitation when the solids fraction is low, and to provide an increased electromotive force as the solids fraction increases (eg, US Pat. 6).
[0017]
[Patent Document 1]
U.S. Pat. No. 3,948,650 (columns 3-8 and FIG. 3)
[0018]
[Patent Document 2]
U.S. Pat. No. 4,465,118 (columns 4-12, FIGS. 1, 2, 5, and 6)
[0019]
[Patent Document 3]
U.S. Pat. No. 4,694,881 (columns 2-6)
[0020]
[Patent Document 4]
JP-A-11-33692 (page 3-5 and FIG. 1)
[0021]
[Patent Document 5]
JP-A-10-128516 (page 4-7 and FIG. 3)
[0022]
[Patent Document 6]
U.S. Pat. No. 6,432,160 (columns 7-15, FIGS. 1A-2B and 4)
[0023]
[Problems to be solved by the invention]
As described above, the conventional method for manufacturing a semi-solid metal slurry and the apparatus for manufacturing the same use a shearing force to pulverize dendritic crystal forms already formed in a cooling process to obtain a metal structure of a granular phase. ing. Therefore, it is difficult to avoid various problems such as a decrease in cooling rate and an increase in production time due to the generation of latent heat due to the formation of an initial solidified layer because a force such as vibration is applied only when at least a part of the molten metal falls below the liquidus line. . In addition, the obtained metal structure is difficult to obtain a uniform and fine structure as a whole due to non-uniform temperature in the container. The non-uniformity of the tissue is further increased due to the temperature difference between.
[0024]
SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing points, and provides energy efficiency improvement, reduction of production cost, improvement of mechanical properties, simplification of the casting process and production while obtaining finer and more uniform spherical particles. A method for producing a solid-liquid coexisting metal material that can realize the advantage of shortening time and can produce a high-quality solid-liquid coexisting metal material in a short time and has excellent coordination with subsequent processes, a manufacturing apparatus thereof, and semi-solidification. An object of the present invention is to provide a method of manufacturing a metal slurry and an apparatus for manufacturing the same.
[0025]
[Means for Solving the Problems]
In the method for producing a metal material in a solid-liquid coexistence state according to claim 1, an applying step of applying an electromagnetic field to a predetermined space where the container is placed, and an electromagnetic field is applied to the space in the applying step. Pouring the molten metal into the container disposed in the space, and transferring the container into which the molten metal has been poured in the pouring step to outside the space. And transferring the molten metal to a solid-liquid coexisting state metal material.
[0026]
Further, as compared with the conventional case, a uniform and fine spherical structure can be obtained as a whole, so that the mechanical properties of the alloy can be improved. In addition, the nucleation density on the vessel wall can be significantly increased by only short-time stirring at a temperature higher than the liquidus line to realize spheroidization of the particles, thereby achieving a uniform and fine particle distribution as a whole. Therefore, the mechanical properties of the alloy can be improved.
[0027]
The method for producing a metal material in a solid-liquid coexistence state according to claim 2 is the method for producing a metal material in a solid-liquid coexistence state according to claim 1, wherein the applying step is performed before pouring the molten metal into the container in the pouring step. Then, an electromagnetic field is applied to the space.
[0028]
Then, before pouring the molten metal into the container in the pouring step, an electromagnetic field is applied to the space in the applying step, whereby the solid-liquid coexisting metal having a uniform and fine spherical structure as a whole is obtained. The material can be obtained easily.
[0029]
According to a third aspect of the present invention, in the method for manufacturing a solid-liquid coexisting metallic material according to the first or second aspect, the applying step includes applying an electromagnetic field to the space, and then applying the electromagnetic field to the space. A container is arranged in the unit.
[0030]
Then, even after the electromagnetic field is applied to the space in the application step, even if a container is arranged in the space, a solid-liquid coexisting metal material having a uniform and fine spherical structure as a whole can be easily obtained. Can be.
[0031]
According to a fourth aspect of the present invention, there is provided a method of manufacturing a solid-liquid coexisting metal material according to the first aspect, wherein the applying step comprises simultaneously pouring the molten metal into the container in the pouring step. , An electromagnetic field is applied to the space.
[0032]
Even when the molten metal is poured into the container in the pouring step and an electromagnetic field is applied to the space at the same time as the applying step, the solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole is obtained. Can be easily obtained.
[0033]
According to a fifth aspect of the present invention, there is provided the method for producing a solid-liquid coexisting metal material according to the first aspect, wherein the applying step includes the step of pouring the molten metal into the container in the pouring step. In this, an electromagnetic field is applied to the space.
[0034]
Then, even if an electromagnetic field is applied to the space in the application step while the molten metal is being poured into the container in the pouring step, the solid-liquid coexisting metal having a uniform and fine spherical structure as a whole is obtained. The material can be obtained easily.
[0035]
The method for producing a metal material in a solid-liquid coexistence state according to claim 6 is the method for producing a metal material in a solid-liquid coexistence state according to any one of claims 1 to 5, wherein the applying step comprises: The electromagnetic field is applied to the space until the value becomes 0.001 or more and 0.7 or less.
[0036]
Then, by applying an electromagnetic field to the space in the application step until the solid phase ratio of the molten metal in the container becomes 0.001 or more and 0.7 or less, a uniform and fine spherical structure is obtained as a whole. The solid-liquid coexisting metal material can be obtained more easily.
[0037]
The method for producing a metal material in a solid-liquid coexistence state according to claim 7 is the method for producing a metal material in a solid-liquid coexistence state according to any one of claims 1 to 5, wherein the applying step comprises: The electromagnetic field is applied to the space until the value becomes 0.001 or more and 0.4 or less.
[0038]
Then, by applying an electromagnetic field to the space in the application step until the solid phase ratio of the molten metal in the container becomes 0.001 or more and 0.4 or less, a uniform and fine spherical structure is obtained as a whole. It is more desirable because the solid-liquid coexisting metallic material can be obtained more easily.
[0039]
The method for producing a metal material in a solid-liquid coexistence state according to claim 8 is the method for producing a metal material in a solid-liquid coexistence state according to any one of claims 1 to 5, wherein the applying step comprises: The electromagnetic field is applied to the space until the value becomes 0.001 or more and 0.1 or less.
[0040]
Then, by applying an electromagnetic field to the space in the application step until the solid phase ratio of the molten metal in the container becomes 0.001 or more and 0.1 or less, a uniform and fine spherical structure is obtained as a whole. It is more desirable because the solid-liquid coexisting metallic material can be obtained more easily.
[0041]
The method for producing a metal material in a solid-liquid coexistence state according to claim 9 is the method for producing a metal material in a solid-liquid coexistence state according to any one of claims 1 to 8, after the molten metal is poured into the container in the pouring step. And a cooling step of cooling the container.
[0042]
Then, after pouring the molten metal into the container in the pouring step, the container is cooled in the cooling step, so that the solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily formed. Obtainable.
[0043]
In the method for producing a metal material in a solid-liquid coexistence state according to claim 10, in the method for producing a metal material in a solid-liquid coexistence state according to claim 9, the cooling step may be such that the solid phase ratio of the molten metal in the container is 0.1 or more. The container is cooled until it becomes 0.7 or less.
[0044]
By cooling the container in the cooling step until the solid phase ratio of the molten metal in the container becomes 0.1 or more and 0.7 or less, the solid-liquid coexistence state of a uniform and fine spherical structure as a whole is obtained. It is more desirable because a metal material can be obtained more easily.
[0045]
In the method for producing a metal material in a solid-liquid coexistence state according to claim 11, in the method for producing a metal material in a solid-liquid coexistence state according to claim 9, the cooling step comprises: The cooling is performed at a rate of 0.0 ° C./sec or less.
[0046]
Then, the molten metal in the container is cooled at a rate of 0.2 ° C./sec or more and 5.0 ° C./sec or less in a cooling step, so that a solid-liquid coexistence state of a uniform and fine spherical structure as a whole is obtained. It is more desirable because a metal material can be obtained more easily.
[0047]
The method for producing a metal material in a solid-liquid coexistence state according to claim 12 is the method for producing a metal material in solid-liquid coexistence state according to claim 9, wherein the cooling step comprises: The cooling is performed at a rate of 0.0 ° C./sec or less.
[0048]
Then, the molten metal in the container is cooled at a rate of 0.2 ° C./sec or more and 2.0 ° C./sec or less in a cooling step, so that a solid-liquid coexistence state of a uniform and fine spherical structure as a whole is obtained. It is more desirable because a metal material can be obtained more easily.
[0049]
According to a thirteenth aspect of the present invention, in the method for producing a semi-solid metal slurry, the solid-liquid coexisting metal material according to any one of the first to twelfth aspects is a semi-solid metal slurry.
[0050]
The solid-liquid coexisting metal material according to any one of the first to twelfth aspects is a semi-solid metal slurry, and thus has the same effect as the solid-liquid coexisting metal material according to the first to twelfth aspects.
[0051]
The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 14 includes a predetermined space portion, a stirrer for applying an electromagnetic field to this space, a container housed in the space of the stirrer, It is provided with a drive unit for accommodating a container in the space, and a pouring unit for pouring molten metal into the container.
[0052]
And since the whole process can be simplified and the electromagnetic field stirring time can be greatly reduced, the energy consumption required for the stirring is reduced, and the product molding time is shortened, which has considerable economical advantages. The coordination is also excellent and the yield can be greatly improved.
[0053]
In the apparatus for producing a metal material in a solid-liquid coexistence state according to a fifteenth aspect, in the apparatus for producing a metal material in a solid-liquid coexistence state according to the fourteenth aspect, the stirring section is configured to pour the molten metal into the container at the pouring section. Before, an electromagnetic field is applied to the space.
[0054]
Before the molten metal is poured into the container at the pouring section, the stirring section applies an electromagnetic field to the space to form a solid-liquid coexisting metal having a uniform and fine spherical structure as a whole. The material can be obtained easily.
[0055]
In the apparatus for producing a metal material in a solid-liquid coexistence state according to claim 16, in the apparatus for producing a metal material in a solid-liquid coexistence state according to claim 14, a molten metal is poured into a container by a pouring section in a stirring section. At the same time, an electromagnetic field is applied to the space.
[0056]
At the same time as the molten metal is poured into the container at the pouring section, even when the stirring section applies an electromagnetic field to the space, the solid-liquid coexisting metal having a uniform and fine spherical structure as a whole is obtained. The material can be obtained easily.
[0057]
In the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 17, in the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 14, a molten metal is poured into a container by a pouring section in a stirring section. On the way, an electromagnetic field is applied to the space.
[0058]
Even when the molten metal is poured into the container at the pouring section, even if the stirring section applies an electromagnetic field to the space, the solid-liquid coexisting metal having a uniform and fine spherical structure as a whole is obtained. The material can be obtained easily.
[0059]
An apparatus for producing a metal material in a solid-liquid coexistence state according to claim 18 is the apparatus for producing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 17, wherein the driving unit is configured to supply molten metal to the container at the pouring unit. After pouring, the container is raised to transfer the container out of the space.
[0060]
Then, after the molten metal is poured into the container at the pouring section, the drive section raises the container and transfers the container out of the space, so that the container into which the molten metal has been poured can be easily transferred. Become.
[0061]
In the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 19, in the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 18, the drive unit horizontally moves the container.
[0062]
And since a drive part moves a container horizontally, it can transfer this container out of a space part, without overflowing the molten metal poured into this container.
[0063]
An apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 20, wherein the driving unit is a rotary plate in which a container is installed at an edge portion in the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 19. After the molten metal is poured into the container at the pouring section, the rotating plate is lowered and rotated to transfer the container out of the space.
[0064]
Then, after the molten metal is poured into the container at the pouring section, the rotating plate provided with the container at the edge is lowered and rotated to transfer the container out of the space. Transfer to the outside of the space can be ensured with a simple configuration.
[0065]
An apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 21 is the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 18 or 19, further comprising a rail that supports a driving unit so as to be movable horizontally. The part lowers the container after the molten metal is poured into the container, and then moves horizontally along the rail to transfer the container out of the space.
[0066]
Then, after the molten metal was poured into the container, the driving unit lowered the container, and then moved horizontally along the rail to transfer the container out of the space, so that the molten metal was poured. The transfer of the container to the outside of the space can be reliably performed with a simple configuration.
[0067]
In the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 22, in the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 21, the agitating unit is poured into the container by the pouring unit. An electromagnetic field is applied to the space until the solid phase ratio of the molten metal becomes 0.001 or more and 0.7 or less.
[0068]
The stirring unit applies an electromagnetic field to the space until the solid phase ratio of the molten metal poured into the container at the pouring unit becomes 0.001 or more and 0.7 or less. Further, a metal material having a fine and spherical structure in a solid-liquid coexistence state can be more easily obtained, so that it is more desirable.
[0069]
In the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 23, in the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 21, the agitating section is poured into the container by the pouring section. The electromagnetic field is applied to the space until the solid phase ratio of the molten metal becomes 0.001 or more and 0.4 or less.
[0070]
The stirring unit applies an electromagnetic field to the space until the solid phase ratio of the molten metal poured into the container at the pouring unit becomes 0.001 or more and 0.4 or less. Further, a metal material having a fine and spherical structure in a solid-liquid coexistence state can be more easily obtained, so that it is more desirable.
[0071]
In the apparatus for producing a metal material in a solid-liquid coexistence state according to claim 24, in the apparatus for producing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 21, the agitating section is poured into the container by the pouring section. The electromagnetic field is applied to the space until the solid phase ratio of the molten metal becomes 0.001 or more and 0.1 or less.
[0072]
The stirring unit applies an electromagnetic field to the space until the solid phase ratio of the molten metal poured into the container at the pouring unit becomes 0.001 or more and 0.1 or less. Further, a metal material having a fine and spherical structure in a solid-liquid coexistence state can be more easily obtained, so that it is more desirable.
[0073]
An apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 25 is the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 24, wherein the apparatus is attached to a container and adjusts the temperature of the molten metal in the container. It is equipped with a temperature controller for adjusting.
[0074]
By adjusting the temperature of the molten metal in the container with a temperature controller attached to the container, it is possible to more easily and reliably obtain a solid-liquid coexisting metal material having a uniform and fine spherical structure as a whole. Can be.
[0075]
An apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 26 is the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 25, wherein the temperature control device is attached to the container and cools the molten metal in the container. The cooling device is provided.
[0076]
Then, by cooling the molten metal in the container with a cooling device attached to the container, it is possible to more easily and reliably obtain a solid-liquid coexisting metal material having a uniform and fine spherical structure as a whole. .
[0077]
An apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 27 is the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 25 or 26, wherein the temperature control device is attached to a container, and the molten metal in the container is Is provided with a heating device for heating.
[0078]
Then, by heating the molten metal in this container with a heating device attached to the container, it is possible to more easily and reliably obtain a solid-liquid coexisting metal material having a uniform and fine spherical structure as a whole. .
[0079]
An apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 28 is the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 27, wherein the heating device is an electric heater.
[0080]
By using an electric heater as the heating device, it is possible to more easily obtain a solid-liquid coexisting metal material having a uniform and fine spherical structure as a whole with a simple configuration.
[0081]
The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 29 is the apparatus for producing a metal material in a solid-liquid coexistence state according to claim 25 or 26, wherein the temperature control device has a solid phase ratio of molten metal in the container of 0. It cools until it becomes not less than 1 and not more than 0.7.
[0082]
Then, the temperature controller cools the molten metal in the container until the solid phase ratio of the molten metal becomes 0.1 or more and 0.7 or less, so that a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole is obtained. Is more preferable because it can be obtained more easily.
[0083]
The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 30 is the apparatus for producing a metal material in a solid-liquid coexistence state according to claim 25 or 26, wherein the temperature control device sets the molten metal in the container to 0.2 ° C / The cooling is performed at a rate of not less than sec and not more than 5.0 ° C./sec.
[0084]
The molten metal in the container is cooled at a rate of 0.2 ° C./sec or more and 5.0 ° C./sec or less by the temperature control device, so that a solid-liquid coexistence state of a uniform and fine spherical structure as a whole is obtained. It is more desirable because a metal material can be obtained more easily.
[0085]
The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 31 is the apparatus for producing a metal material in a solid-liquid coexistence state according to claim 25 or 26, wherein the temperature control device sets the molten metal in the container to 0.2 ° C. / The cooling is performed at a rate of not less than sec and not more than 2.0 ° C./sec.
[0086]
The molten metal in the container is cooled at a rate of 0.2 ° C./sec or more and 2.0 ° C./sec or less by a temperature control device, so that a solid-liquid coexistence state of a uniform and fine spherical structure as a whole is obtained. It is more desirable because a metal material can be obtained more easily.
[0087]
According to a thirty-second aspect of the present invention, the solid-liquid coexisting metal material according to any one of the fourteenth to thirty-first aspects is a semi-solid metal slurry.
[0088]
The solid-liquid coexisting metal material according to any one of claims 14 to 31 is a semi-solid metal slurry, and thus has the same effect as the solid-liquid coexisting metal material according to any one of claims 14 to 31.
[0089]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a method for producing a metal material in a solid-liquid coexistence state according to a first embodiment of the present invention will be described with reference to the drawings.
[0090]
First, the metal material in the solid-liquid coexistence state is a semi-solid metal slurry, and this semi-solid metal slurry is stirred in an electromagnetic field before pouring the molten metal M into the slurry production vessel 2a in the pouring step. That is, before pouring the molten metal M into the slurry production container 2a in the pouring process, at the same time as pouring the molten metal M into the slurry production container 2a in the pouring process, or in the pouring process. During the pouring of the molten metal M into the melt, the generation of the initial dendritic structure is cut off by stirring with an electromagnetic field in the application step. At this time, ultrasonic waves or the like can be used instead of the electromagnetic field for the stirring.
[0091]
In other words, the stirring by the electromagnetic field in the applying step is performed by disposing the empty slurry production container 2a in which the molten metal M is not poured into the predetermined space portion 13 as an arrangement step. In a vacant state, an electromagnetic field is applied to the space 13 as an application step, and the molten metal M is poured. At this time, the application of the electromagnetic field is performed with a strength capable of stirring the molten metal M.
[0092]
Thereafter, as shown in FIG. 1, the molten metal M is poured at a pouring temperature T as a pouring step. _P To pour into the slurry production container 2a. At this time, an electromagnetic field is applied to the slurry production container 2a to stir the molten metal M. The arranging step of arranging the slurry manufacturing container 2a in the space 13 can be performed even after the electromagnetic field is applied to the space 13. At this time, the molten metal M can be stirred in the electromagnetic field simultaneously with the pouring of the molten metal M, and can be stirred in the electromagnetic field even while the molten metal M is being poured.
[0093]
As described above, by applying the electromagnetic field before the pouring of the molten metal M into the slurry production container 2a is completed, it becomes difficult for the molten metal M to form an initial solidified layer on the inner wall of the low temperature slurry production container 2a. . Then, fine crystal nuclei are simultaneously generated in the entire slurry production container 2a, and the entire molten metal M in the slurry production container 2a is rapidly cooled uniformly to a liquidus temperature or lower, thereby simultaneously generating a large number of crystal nuclei. .
[0094]
This is because the molten metal M inside and the molten metal M on the surface are well stirred by vigorous initial stirring action by applying an electromagnetic field before or simultaneously with pouring the molten metal M into the slurry production container 2a. This is because heat transfer in the molten metal M is fast, and the formation of an initial solidified layer on the inner wall of the slurry production container 2a is suppressed.
[0095]
In addition, the convective heat transfer between the well-stirred molten metal M and the inner wall of the low-temperature slurry production vessel 2a increases to rapidly cool the temperature of the entire molten metal M. That is, the poured molten metal M is dispersed into the dispersed particles by the stirring of the electromagnetic field at the same time as the molten metal is poured, and the dispersed particles are uniformly distributed as crystal nuclei in the slurry production container 2a. No temperature difference occurs. On the other hand, according to the above-described conventional technique, the molten metal M poured into the molten metal M comes into contact with the inner wall of the low-temperature slurry production vessel 2a and grows into a dendritic crystal in the initially solidified layer by rapid convection heat transfer. I do.
[0096]
Such a principle can be explained in relation to the latent heat of solidification. That is, since the initial solidification of the molten metal M does not occur on the wall surface of the slurry production vessel 2a, no latent heat of solidification is generated, whereby the cooling of the molten metal M is performed only by the specific heat of the molten metal M (about 1/400 of the latent heat of solidification). It is possible only by releasing the amount of heat corresponding to (not). Therefore, the dendritic crystal, which is an initial solidified layer, which often occurs on the wall surface of the slurry manufacturing container 2a in the related art, is not formed, and the molten metal M in the slurry manufacturing container 2a moves from the wall surface of the slurry manufacturing container 2a to the central portion. Shows that the temperature decreases uniformly and rapidly over the entirety. The time required to lower the temperature at this time is only a short time of about 1 second to 10 seconds after the molten metal M is poured. As a result, a large number of crystal nuclei are uniformly generated over the entire molten metal M in the slurry production vessel 2a, and the distance between the crystal nuclei becomes extremely short due to an increase in the crystal nucleus generation density, so that dendritic crystals are not formed. Grow independently to form spherical particles.
[0097]
This is the same when the electromagnetic field is applied while the molten metal M is being poured. That is, the initial solidified layer is less likely to be formed on the inner wall surface of the slurry production container 2a by the electromagnetic field agitation during the pouring process.
[0098]
At this time, the pouring temperature T of the molten metal M _P Is preferably maintained at a temperature equal to or higher than the liquidus temperature and equal to or lower than the liquidus temperature + 100 ° C. (superheat degree of the molten metal = 0 to 100 ° C.). As described above, since the entire inside of the slurry production container 2a containing the molten metal M is uniformly cooled, the molten metal M is cooled to around the liquidus temperature before pouring the molten metal M into the slurry production container 2a. This is because there is no need to maintain a temperature higher than the liquidus temperature by about 100 ° C.
[0099]
On the other hand, according to the conventional method in which the molten metal M is poured into the slurry production vessel 2a and then an electromagnetic field is applied to the slurry production vessel 2a when a part of the molten metal M becomes below the liquidus line, Latent heat of solidification is generated while an initial solidified layer is formed on the wall surface of the vessel 2a, but since the latent heat of solidification is about 400 times the specific heat, it takes a long time for the temperature of the molten metal M in the entire slurry production vessel 2a to drop. . Therefore, in such a conventional method, it is common that the temperature of the molten metal M is cooled down to about the liquidus or about 50 ° C. higher than the liquidus, and then poured into the slurry production vessel 2a. .
[0100]
Further, as shown in FIG. 1, even when the molten metal M in the slurry production vessel 2a is at least partially, the temperature of the molten metal M is reduced to the liquidus temperature T as shown in FIG. ₁ When the temperature drops below, that is, when the solid phase ratio of the molten metal M is about 0.001 and even a predetermined crystal nucleus is generated, it does not matter much if the process is terminated at any time. That is, the molten metal M is poured into the slurry production container 2a and an electromagnetic field is applied until the molten metal M is cooled, before the subsequent die casting step or a forming step such as a hot forging step (not shown). The stirring by the electromagnetic field may be stopped. This is because the crystal nuclei are already uniformly distributed over the entire slurry production vessel 2a, so that the stirring of the electromagnetic field at the stage of crystal grain growth centering on the crystal nuclei affects the characteristics of the produced metal slurry. Because it has no effect. Therefore, the stirring by the electromagnetic field is continued until at least the solid phase ratio of the molten metal M reaches 0.001 or more and 0.7 or less.
[0101]
However, since the duration of stirring by the electromagnetic field can be considered in terms of energy efficiency, it can be maintained at least until the solid phase ratio of the molten metal M in the slurry production vessel 2a becomes 0.001 or more and 0.4 or less, which is more desirable. Is maintained until the solid fraction of the molten metal M becomes 0.001 or more and 0.1 or less.
[0102]
As described above, after stirring by the electromagnetic field, the slurry manufacturing container 2a is transferred to the outside of the space 13 to which the electromagnetic field is applied, and is linked to a subsequent process. That is, the molding is performed by moving to a die casting process, a hot forging process, or a billet manufacturing process, which is a subsequent process. Such transfer of the slurry production container 2a can proceed independently of the end of the electromagnetic field. First, after the application of the electromagnetic field is completed, the slurry production container 2a can be transferred, and the electromagnetic field is applied to the space 13. In this state, the slurry manufacturing container 2a can be transferred to the outside of the space 13 and separated therefrom.
[0103]
On the other hand, before the pouring of the molten metal M into the slurry production container 2a is completed, an electromagnetic field is applied to form crystal nuclei having a uniform distribution, and then the slurry is produced by cooling the slurry production container 2a as a cooling step. Can accelerate the growth of crystal nuclei. Therefore, such a cooling step can be started when the molten metal M is poured into the slurry production container 2a.
[0104]
Also, an electromagnetic field may be continuously applied during the cooling step. Therefore, the cooling step may be performed when the slurry manufacturing container 2a is in the space 13 to which the electromagnetic field is applied, that is, before the slurry manufacturing container 2a is separated from the space 13. As a result, after the metal slurry in a semi-solid state is manufactured in the slurry manufacturing container 2a located in the space 13, the metal slurry can be immediately used in the subsequent forming process.
[0105]
On the other hand, such a cooling step can be continued until before the forming step which is a subsequent step, but at the time t when the molten metal M reaches a solid fraction of 0.1 or more and 0.7 or less. ₂ The cooling process can be maintained until. At this time, the cooling rate of the molten metal M is about 0.2 ° C./sec or more and about 5.0 ° C./sec or less, which depends on the distribution of crystal nuclei and the fineness of the particles. It can be set to 2.0 ° C./sec or less.
[0106]
As a result, a semi-solidified metal slurry having a predetermined solid fraction can be produced, which is immediately transferred to a billet production step in a transfer step, and a quenching is performed to produce a semi-solid molding billet, or die casting or forging. Alternatively, it is transferred to a press working step and formed into a final product.
[0107]
At this time, the time for producing the metal slurry in a semi-solid state can be remarkably shortened. However, from the time when the molten metal M is poured into the slurry production container 2a, the metal slurry having a solid fraction of 0.1 or more and 0.7 or less is formed. The time taken to form the metal material is no less than 30 seconds and no more than 60 seconds. If a product is formed using the metal slurry thus manufactured, a uniform and dense spherical crystal structure can be obtained.
[0108]
Next, an apparatus for producing a semi-solid metal slurry used as a method for producing the semi-solid metal slurry will be described with reference to FIGS.
[0109]
The apparatus for producing a semi-solid metal slurry shown in FIGS. 2 and 3 includes a stirring unit 1, and a space 13 is provided inside the stirring unit 1. Further, an electromagnetic field applying coil device 11 is formed in the stirring unit 1 so as to surround the space 13. Further, at least one slurry production container 2a is attached to the space 13 of the stirring unit 1 so as to be able to be accommodated therein. The slurry production container 2a can be moved up and down by a drive unit 3, and molten metal M is poured into the slurry production container 2a by a pouring container 4 serving as a pouring unit. The stirring unit 1 and the driving unit 3 are controlled by the control unit 5.
[0110]
The stirring unit 1 is provided above a hollow base plate 14, and the base plate 14 is supported and attached by a support member 15 so as to be at a predetermined height from the ground. The coil device 11 for applying an electromagnetic field is attached to an upper portion of the base plate 14 around an opening 14 a opened at the center of the base plate 14. The electromagnetic field applying coil device 11 is supported by a predetermined frame 12 having a space 13 inside. The coil device 11 for applying an electromagnetic field is electrically connected to the control unit 5, and applies an electromagnetic field toward the space 13 for a predetermined time so that the inside of the slurry production container 2 a accommodated in the space 13 is formed. Is stirred electromagnetically. The stirring unit 1 may be an ultrasonic stirring device (not shown).
[0111]
Next, the slurry production container 2a is formed of a metal material or an insulating material, and the size of the slurry production container 2a may be such that it can be accommodated in the space 13 of the stirring unit 1. In addition, it is desirable that the slurry manufacturing container 2a be used such that the melting point of the slurry manufacturing container 2a itself is higher than the temperature of the molten metal M contained therein. Further, a step 21 is formed on the outer peripheral edge of the bottom of the slurry production container 2a so that the slurry production container 2a does not move. Further, another thermocouple (not shown) is built in the slurry manufacturing container 2a, and the thermocouple is connected to the control unit 5, and the temperature information is sent to the control unit 5.
[0112]
Here, as shown in FIGS. 2 and 3, the slurry production container 2a may be formed so as to simply accommodate the molten metal M, but as in the second embodiment shown in FIG. The temperature control device 20 can be further attached. The temperature control device 20 includes a cooling device and a heating device. A cooling water pipe 23 is provided in the container main body 22 of the slurry production container 2a to form a cooling device. An electric heating coil is provided outside the container main body 22. The heating device is configured by attaching a heater device such as an electric heater (not shown). In addition, the cooling device can also separately attach the cooling water pipe 23 to the outside of the container body 22 in a water jacket shape. The cooling water pipe 23 and the heater device can be attached to the slurry manufacturing container 2a singly or in combination, and can cool the molten metal M contained in the slurry manufacturing container 2a at an appropriate speed.
[0113]
On the other hand, the driving unit 3 that moves the slurry manufacturing container 2 a up and down moves the slurry manufacturing container 2 a into the space 13 and separates the slurry manufacturing container 2 a to the outside of the space 13. Further, the drive unit 3 includes a drive motor and a gear device or a hydraulic cylinder (not shown). More specifically, the drive unit 3 includes a power unit 31 electrically connected to the control unit 5, extends from the power unit 31 to the inside of the space 13, and linearly reciprocates by the power unit 31. A piston 32 is mounted. A seat 33 a located inside the space 13 is connected to an end of the piston 32. The slurry production container 2a is seated and attached to the seat 33a.
[0114]
Further, the pouring container 4 pours the molten metal M in the liquid phase into the slurry manufacturing container 2a when the slurry manufacturing container 2a is moved up by the driving unit 3 and accommodated in the space 13 to which the electromagnetic field is applied. . As the pouring container 4, a normal ladle electrically connected to the control unit 5 is used.
[0115]
Therefore, as shown in FIG. 2, the apparatus for producing a semi-solid metal slurry operates the driving unit 3 to accommodate the slurry production container 2 a in the space 13, and then uses the coil unit for applying an electromagnetic field in the stirring unit 1. 11 applies an electromagnetic field to the space 13 at a predetermined frequency and intensity. The storage of the slurry production container 2a in the space 13 may be performed after an electromagnetic field is applied to the space 13. Then, the molten metal M melted in another electric furnace is transferred by the pouring vessel 4 and poured into the slurry producing vessel 2a under the influence of the electromagnetic field. At this time, the application of the electromagnetic field may be performed before pouring the molten metal M, but may be performed simultaneously with the pouring of the molten metal M or during the pouring of the molten metal M.
[0116]
Further, after the molten metal M has been poured into the slurry production container 2a, the slurry production container 2a is raised by the driving unit 3 after a predetermined time, and the slurry production container is placed outside the space 13 as shown in FIG. 2a is transferred and removed, and is replaced with a new slurry production container 2a by a transfer device such as a robot (not shown). At this time, the replaced slurry production container 2a is cooled at a predetermined speed until the solid content ratio becomes 0.1 or more and 0.7 or less to produce a semi-solid metal slurry. The cooling rate at this time is 0.2 ° C./sec or more and 5 ° C./sec or less, and more preferably 0.2 ° C./sec or more and 2 ° C./sec or less. The cooling of the slurry manufacturing container 2a can be performed before the slurry manufacturing container 2a is replaced, that is, before the slurry manufacturing container 2a is transferred to the outside of the space 13 by the driving unit 3 and separated therefrom. After the completion of the above, the slurry production container 2a can be detached outside the space portion 13 and replaced with a new slurry production container 2a.
[0117]
On the other hand, the application of the electromagnetic field can be continued until the cooling is completed. That is, the electromagnetic field may be continuously applied until the driving unit 3 transfers the slurry manufacturing container 2a to the outside of the space 13 and separates it. The application of the electromagnetic field is continued until the solid phase ratio of the molten metal M becomes at least 0.001 or more and 0.7 or less. However, in the energy efficiency dimension, the electromagnetic field applying coil device 11 continues until the solid phase ratio of the molten metal M becomes at least 0.001 or more and 0.4 or less after pouring of the molten metal M, and more preferably, This is maintained until the solid phase ratio of the molten metal M becomes 0.001 or more and 0.1 or less. The time required for the molten metal M to reach such a solid fraction can be determined in advance by an experiment. In this way, the cooling can be progressed all the time even during the application of the electromagnetic field.
[0118]
Further, as in the third embodiment shown in FIG. 5, two or more slurry production containers 2a and 2b can be provided, and these slurry production containers 2a and 2b can be formed so as to work simultaneously. In this case, the seats 33a and 33b are arranged on the fixing plate 34, and the seats 33a and 33b are separated from the space 13 so as to separate the slurry production containers 2a and 2b to the upper outside of the stirring unit 1. Are formed higher in accordance with the height of the object.
[0119]
Next, as in the fourth embodiment shown in FIGS. 6 and 7, when the slurry manufacturing container 2a is horizontally moved by the driving unit 3, the rotating plate 35 is attached to the end of the piston 32 of the driving unit 3. Is installed. At this time, the piston 32 is connected to a substantially intermediate portion of the rotating plate 35. At least one or more seats 33a, 33b are mounted on the edge of the rotating plate 35. Further, the slurry production containers 2a and 2b are seated on these seats 33a and 33b. Then, the power unit 31 not only moves the piston 32 up and down but also rotates it. Therefore, the power unit 31 moves the slurry manufacturing containers 2 a and 2 b horizontally by the rotation of the rotary plate 35 and separates the slurry manufacturing containers 2 a and 2 b outside the space 13.
[0120]
Then, as shown in FIG. 7 (a), after the piston 32 is raised and the first slurry production container 2a is accommodated in the space 13, the electromagnetic field applying coil device 11 of the stirring unit 1 moves the piston into the space 13. Apply an electromagnetic field. At this time, the first slurry production container 2a may be accommodated in the space 13 while the electromagnetic field is being applied.
[0121]
In this state, as shown in FIG. 7B, the molten metal M is poured into the first slurry production vessel 2a by the pouring vessel 4, and the electromagnetic field is maintained for a predetermined time. At this time, the electromagnetic field may be applied simultaneously with the pouring of the molten metal M, or the electromagnetic field may be applied while the molten metal M is being poured.
[0122]
Thereafter, as shown in FIG. 7C, the piston 32 is lowered so that the first slurry production container 2a is separated from the lower side of the space 13, and as shown in FIG. The position of the second slurry production container 2b and the first slurry production container 2a, which are empty containers, are changed by rotating 32. At this time, the first slurry production vessel 2a produces a slurry by cooling the molten metal M inside the first slurry production vessel 2a at a predetermined cooling rate until a predetermined solid phase ratio is reached. As shown in FIG. 7 (e), the piston 32 is raised again, and the same process is repeated in the second slurry production container 2b. At this time, the first slurry production container 2a is transferred by the robot 6 as a transfer means, and another subsequent forming step is performed. As a result, a large amount of semi-solid metal slurry can be continuously manufactured, and the associativity with the subsequent process can be further increased to improve the efficiency of the entire process.
[0123]
Further, as in the fifth embodiment shown in FIG. 8, the slurry production container 2a can be moved horizontally by moving the drive unit 3 horizontally along another rail 36.
[0124]
In each of the above-described embodiments, various metals or alloys, such as aluminum or its alloy, magnesium or its alloy, zinc or its alloy, copper or its alloy, and iron or its alloy, may be used for semi-solid molding. Can be applied universally. In addition, the metal material manufactured as described above has a fine spherical shape having an average particle size of 10 μm or more and 60 μm or less, and has a uniform particle size distribution.
[0125]
【The invention's effect】
According to the method for producing a metal material in a solid-liquid coexistence state according to the first aspect, a uniform and fine spherical structure can be obtained as a whole, as compared with the conventional method, so that the mechanical properties of the alloy can be improved. In addition, the nucleation density on the vessel wall can be significantly increased by only short-time stirring at a temperature higher than the liquidus line to realize spheroidization of the particles, thereby achieving a uniform and fine particle distribution as a whole. Therefore, the mechanical properties of the alloy can be improved.
[0126]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 2, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to claim 1, a molten metal is poured into a container in a pouring step. By applying an electromagnetic field to the space in the application step beforehand, it is possible to easily obtain a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole.
[0127]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 3, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to claim 1 or 2, an electromagnetic field is applied to the space in the application step. After that, even if a container is arranged in this space, a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be easily obtained.
[0128]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 4, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to claim 1, when a molten metal is poured into a container in a pouring step. At the same time, even when an electromagnetic field is applied to the space in the application step, a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be easily obtained.
[0129]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 5, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to claim 1, molten metal is poured into a container in a pouring step. Even if an electromagnetic field is applied to the space in the application step in the middle, a solid-liquid coexisting metal material having an overall uniform and fine spherical structure can be easily obtained.
[0130]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 6, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to any one of claims 1 to 5, the solid phase ratio of the molten metal in the container By applying an electromagnetic field to the space in the applying step until the value becomes 0.001 or more and 0.7 or less, a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily obtained. be able to.
[0131]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 7, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to any one of claims 1 to 5, the solid phase ratio of the molten metal in the container is By applying an electromagnetic field to the space in the applying step until the value becomes 0.001 or more and 0.4 or less, a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily obtained. More desirable.
[0132]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 8, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to any one of claims 1 to 5, the solid phase ratio of the molten metal in the container is By applying an electromagnetic field to the space in the application step until the value becomes 0.001 or more and 0.1 or less, a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily obtained. More desirable.
[0133]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 9, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to any one of claims 1 to 8, the molten metal is added to the container in the pouring step. After pouring, the container is cooled in a cooling step, whereby a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily obtained.
[0134]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 10, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to claim 9, the solid phase ratio of the molten metal in the container is 0.1. By cooling the container in the cooling step until it becomes not less than 0.7 or less, a metal material in a solid-liquid coexistence state having a uniform and fine spherical structure as a whole can be more easily obtained, which is more preferable.
[0135]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 11, in addition to the effect of the method for producing a metal material in a solid-liquid coexistence state according to claim 9, the molten metal in the container is cooled by 0.2 in the cooling step. Cooling at a rate of not less than ° C / sec and not more than 5.0 ° C / sec is more preferable because a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily obtained.
[0136]
According to the method for producing a metal material in a solid-liquid coexistence state according to claim 12, in addition to the effect of the method for producing a metal material in solid-liquid coexistence state according to claim 9, the molten metal in the container is cooled by 0.2 in the cooling step. Cooling at a rate of not less than 2 ° C./sec and not more than 2.0 ° C./sec is more preferable because a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily obtained.
[0137]
According to the method for producing a semi-solid metal slurry according to the thirteenth aspect, the solid-liquid coexisting metal material according to any one of the first to twelfth aspects is a semi-solid metal slurry. The same effect as that of the solid-liquid coexisting metallic material can be obtained.
[0138]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 14, since the entire process can be simplified and the electromagnetic field stirring time can be greatly reduced, energy consumption required for stirring is reduced and the product molding time is also reduced. In addition to having a considerable economical advantage, it is also excellent in coordination with the subsequent steps and can greatly increase the yield.
[0139]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 15, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 14, molten metal is poured into the container at the pouring section. By applying the electromagnetic field to the space before the stirring section, a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be easily obtained.
[0140]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 16, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 14, molten metal is poured into the container at the pouring section. At the same time, even if the stirring section applies an electromagnetic field to the space, a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be easily obtained.
[0141]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 17, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 14, molten metal is poured into the container at the pouring section. Even if the stirring section applies an electromagnetic field to the space during the stirring, a solid-liquid coexisting metal material having a uniform and fine spherical structure as a whole can be easily obtained.
[0142]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 18, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 17, the molten metal is added to the container at the pouring section. After the molten metal is poured, the drive unit raises the container and transfers the container out of the space, so that the container into which the molten metal has been poured can be easily transferred.
[0143]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 19, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any of claims 14 to 18, the driving unit horizontally moves the container. The container can be transferred to the outside of the space without overflowing the molten metal poured into the container.
[0144]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 20, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any of claims 14 to 19, the molten metal is added to the container at the pouring section. After the molten metal is poured, the rotating plate on which the container is installed is lowered and rotated to transfer the container out of the space, so that the container can be easily transferred out of the space with a simple configuration. I can do it for sure.
[0145]
According to the apparatus for manufacturing a solid-liquid coexisting state metal material according to claim 21, in addition to the effect of the apparatus for manufacturing a solid-liquid coexisting state metal material according to claim 18 or 19, after the molten metal is poured into the container, After the drive unit lowers the container, it moves horizontally along the rails and transfers this container to the outside of the space, so that the container into which the molten metal has been poured can be easily transferred to the outside of the space. I can do it for sure.
[0146]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 22, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any of claims 14 to 21, pouring into a container at a pouring section is performed. The stirring section applies an electromagnetic field to the space until the solid phase ratio of the molten metal becomes 0.001 or more and 0.7 or less, so that a solid-liquid coexistence state of a uniform and fine spherical structure as a whole is obtained. It is more desirable because a metal material can be obtained more easily.
[0147]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 23, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 21, pouring into a container at a pouring section is performed. The stirring section applies an electromagnetic field to the space until the solid phase ratio of the molten metal becomes 0.001 or more and 0.4 or less, so that the solid-liquid coexistence state of a uniform and fine spherical structure as a whole is obtained. It is more desirable because a metal material can be obtained more easily.
[0148]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 24, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 21, pouring into a container at a pouring section is performed. The stirring unit applies an electromagnetic field to the space until the solid phase ratio of the molten metal becomes 0.001 or more and 0.1 or less, so that the solid-liquid coexistence state of a uniform and fine spherical structure as a whole is obtained. It is more desirable because a metal material can be obtained more easily.
[0149]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 25, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to any one of claims 14 to 24, a temperature control device attached to a container is used. By adjusting the temperature of the molten metal in the container, it is possible to more easily and reliably obtain a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole.
[0150]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 26, in addition to the effect of the apparatus for manufacturing a metal material in solid-liquid coexistence state according to claim 25, melting in the container by a cooling device attached to the container By cooling the metal, it is possible to more easily and reliably obtain a solid-liquid coexisting metal material having a uniform and fine spherical structure as a whole.
[0151]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 27, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 25 or 26, a heating device attached to the container can be used to form the inside of the container. By heating the molten metal, a solid-liquid coexisting metal material having a uniform and fine spherical structure as a whole can be obtained more easily and reliably.
[0152]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 28, in addition to the effect of the apparatus for manufacturing a metal material in solid-liquid coexistence state according to claim 27, by using an electric heater for the heating device, A solid-liquid coexisting metallic material having a uniform and fine spherical structure can be more easily obtained with a simple configuration.
[0153]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 29, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 25 or 26, the solid phase ratio of the molten metal in the container is zero. It is more desirable that the temperature control device be cooled until it becomes not less than 1 and not more than 0.7, so that a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily obtained.
[0154]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 30, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 25 or 26, the molten metal in the container is heated at 0.2 ° C. / By cooling the temperature control device at a speed of not less than sec and not more than 5.0 ° C./sec, a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily obtained. desirable.
[0155]
According to the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 31, in addition to the effect of the apparatus for manufacturing a metal material in a solid-liquid coexistence state according to claim 25 or 26, the molten metal in the container is heated at 0.2 ° C. / By cooling the temperature controller at a rate of not less than sec and not more than 2.0 ° C./sec, a solid-liquid coexisting metallic material having a uniform and fine spherical structure as a whole can be more easily obtained. desirable.
[0156]
According to the apparatus for manufacturing a semi-solid metal slurry according to claim 32, the metal material in a solid-liquid coexistence state according to any one of claims 14 to 31 is a semi-solid metal slurry, and thus the metal slurry according to any one of claims 14 to 31 is provided. The same effect as that of the solid-liquid coexisting metallic material can be obtained.
[Brief description of the drawings]
FIG. 1 is a secondary graph showing a molten metal pouring temperature with respect to time in an apparatus for producing a metal material in a solid-liquid coexistence state according to a first embodiment of the present invention.
FIG. 2 is a schematic explanatory view showing an apparatus for producing a metal material in a solid-liquid coexisting state according to the first embodiment.
FIG. 3 is a schematic explanatory view showing an apparatus for producing a metal material in a solid-liquid coexisting state according to the first embodiment.
FIG. 4 is an explanatory sectional view showing a container according to a second embodiment of the apparatus for producing a metal material in a solid-liquid coexistence state according to the present invention.
FIG. 5 is a schematic explanatory view showing a third embodiment of the apparatus for producing a metal material in a solid-liquid coexisting state according to the present invention.
FIG. 6 is a schematic explanatory view showing a fourth embodiment of the apparatus for producing a metal material in a solid-liquid coexistence state according to the present invention.
FIG. 7 is a schematic explanatory view showing a manufacturing process of the manufacturing apparatus for the metal material in the solid-liquid coexisting state.
(A) Explanatory drawing which shows the state which raises a drive part and accommodates a container in a space part.
(B) Explanatory drawing showing a state where molten metal is poured into a container and an electromagnetic field is applied
(C) Explanatory drawing showing a state in which the drive unit is lowered to transfer the container to the lower side of the space.
(D) Explanatory drawing showing a state in which the drive unit is rotated to replace the container.
(E) Explanatory drawing which shows the state which raises a drive part and accommodates another container in a space part, and transfers a container.
FIG. 8 is a schematic explanatory view showing a fifth embodiment of the apparatus for producing a metal material in a solid-liquid coexistence state according to the present invention.
[Explanation of symbols]
1 stirrer
2a Slurry manufacturing container as container
3 Drive
4 Pouring vessel as pouring section
13 Space
20 Temperature control device
23 Cooling water pipe as cooling device
35 rotating plate
36 rails
M molten metal

Claims (32)

An application step of applying an electromagnetic field to a predetermined space where the container is placed,
A pouring step of pouring a molten metal into the container disposed in the space, while an electromagnetic field is being applied to the space in the applying step,
Transferring the container into which the molten metal has been poured in the pouring step to the outside of the space to convert the molten metal into a solid-liquid coexisting state metal material. A method for producing a metallic material in a liquid coexistence state. 2. The method according to claim 1, wherein the applying step applies an electromagnetic field to the space before pouring the molten metal into the container in the pouring step. 3. The method for producing a metal material in a solid-liquid coexistence state according to claim 1, wherein, in the applying step, a container is arranged in the space after applying an electromagnetic field to the space. 2. The method for producing a metal material in a solid-liquid coexistence state according to claim 1, wherein in the applying step, the molten metal is poured into the container in the pouring step, and at the same time, an electromagnetic field is applied to the space. 2. The method for producing a metal material in a solid-liquid coexistence state according to claim 1, wherein the applying step applies an electromagnetic field to the space portion during the pouring of the molten metal into the container in the pouring step. The solid-liquid according to any one of claims 1 to 5, wherein the applying step applies an electromagnetic field to the space until the solid fraction of the molten metal in the container becomes 0.001 or more and 0.7 or less. A method for producing a coexisting metallic material. The solid-liquid according to any one of claims 1 to 5, wherein the applying step applies an electromagnetic field to the space until the solid fraction of the molten metal in the container becomes 0.001 or more and 0.4 or less. A method for producing a coexisting metallic material. The solid-liquid according to any one of claims 1 to 5, wherein the applying step applies an electromagnetic field to the space until the solid fraction of the molten metal in the container becomes 0.001 or more and 0.1 or less. A method for producing a coexisting metallic material. The method for producing a solid-liquid coexisting metal material according to any one of claims 1 to 8, further comprising a cooling step of cooling the container after pouring the molten metal into the container in the pouring step. The method for producing a metal material in a solid-liquid coexistence state according to claim 9, wherein the cooling step cools the container until the solid phase ratio of the molten metal in the container becomes 0.1 or more and 0.7 or less. . The method for producing a metal material in a solid-liquid coexistence state according to claim 9, wherein the cooling step cools the molten metal in the container at a rate of 0.2 ° C / sec or more and 5.0 ° C / sec or less. The method for producing a solid-liquid coexisting metallic material according to claim 9, wherein the cooling step cools the molten metal in the container at a rate of 0.2C / sec or more and 2.0C / sec or less. 13. A method for producing a semi-solid metal slurry, wherein the solid-liquid coexisting metal material according to any one of claims 1 to 12 is a semi-solid metal slurry. A stirrer having a predetermined space, and applying an electromagnetic field to the space,
A container housed in the space of the stirring section,
A driving unit that accommodates the container in the space,
An apparatus for producing a metal material in a solid-liquid coexistence state, comprising: a pouring section for pouring a molten metal into the container. The apparatus according to claim 14, wherein the stirring unit applies an electromagnetic field to the space before the molten metal is poured into the container in the pouring unit. The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 14, wherein the stirring section applies an electromagnetic field to the space at the same time as the molten metal is poured into the container in the pouring section. The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 14, wherein the stirring section applies an electromagnetic field to the space while the molten metal is being poured into the container in the pouring section. 18. The solidifying device according to claim 14, wherein after the molten metal is poured into the container by the pouring unit, the driving unit raises the container and transfers the container out of the space. Production equipment for metallic materials in the liquid coexistence state. 19. The apparatus according to claim 14, wherein the driving unit horizontally moves the container. The driving unit includes a rotating plate on which a container is installed at an edge, and lowers and rotates the rotating plate after the molten metal is poured into the container at the pouring unit to rotate the container to the space. 20. The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 14, wherein the metal material is transferred outside. Equipped with a rail that supports the drive unit so that it can move horizontally,
19. The method according to claim 18, wherein the driving unit lowers the container after the molten metal is poured into the container, and then horizontally moves along the rail to transfer the container out of the space. 20. The apparatus for producing a metal material in the solid-liquid coexistence state according to 19. The stirrer applies an electromagnetic field to the space until the solid phase ratio of the molten metal poured into the container at the pouring unit becomes 0.001 or more and 0.7 or less. 21. The apparatus for producing a metal material in a solid-liquid coexistence state according to any one of 21. The stirring unit applies an electromagnetic field to the space until the solid phase ratio of the molten metal poured into the container at the pouring unit becomes 0.001 or more and 0.4 or less. 21. The apparatus for producing a metal material in a solid-liquid coexistence state according to any one of 21. The stirrer applies the electromagnetic field to the space until the solid phase ratio of the molten metal poured into the container at the pouring unit becomes 0.001 or more and 0.1 or less. 21. The apparatus for producing a metal material in a solid-liquid coexistence state according to any one of 21. 25. The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 14, further comprising a temperature controller attached to the container and adjusting a temperature of the molten metal in the container. 26. The apparatus for producing a metal material in a solid-liquid coexisting state according to claim 25, wherein the temperature control device is provided with a cooling device attached to the container and cooling the molten metal in the container. 27. The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 25, wherein the temperature control device is provided with a heating device attached to the container and heating the molten metal in the container. 28. The apparatus according to claim 27, wherein the heating device is an electric heater. 27. The apparatus for producing a metal material in a solid-liquid coexistence state according to claim 25, wherein the temperature controller cools the molten metal in the vessel until the solid phase ratio of the molten metal becomes 0.1 or more and 0.7 or less. 27. The solid-liquid coexisting metal material according to claim 25, wherein the temperature controller cools the molten metal in the container at a rate of 0.2 ° C./sec or more and 5.0 ° C./sec or less. apparatus. The solid-liquid coexisting metal material according to claim 25 or 26, wherein the temperature controller cools the molten metal in the container at a rate of 0.2 ° C / sec or more and 2.0 ° C / sec or less. apparatus. The apparatus for producing a semi-solid metal slurry, wherein the solid-liquid coexisting metal material according to any one of claims 14 to 31 is a semi-solid metal slurry.

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