JP2002086254A - Method and apparatus for treating metallic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for treating a metallic material with which the metallic material can be made to fine or amorphous and also, the prevention of environmental pollution and the reduction of cost can be obtained. SOLUTION: The metallic material 302 is heated to make the molten state and rapidly cooled and solidified by allowing the molten state metallic material 302 to contact with liquid metallic sodium 4 for cooling and thus, the amorphous metallic material is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for processing a metal material, and more particularly to a method and an apparatus for processing a metal material suitable for making the structure of the metal material finer or amorphous.

[0002]

2. Description of the Related Art First of all, regarding the cooling technology of steel and wire rods and the cooling technology at the time of rolling, metal materials taken out of various metal melting furnaces have properties such as strength and workability according to various applications. In order to obtain a material having characteristics, adjustment of components, heating and cooling, rolling, and the like are performed.

[0003] Of these, heating and cooling are important processes because the crystal structure, crystal grain size, and component distribution, which are the basic properties of steel and wire, vary greatly depending on the heating and cooling patterns such as heating temperature and cooling rate. is there. Among them, the cooling rate when passing through various transformation temperatures of the metal material is particularly important. It is well known that the higher the cooling rate, the smaller the crystal grains and structures become, and that the smaller the crystal grains and structures, the better the strength and toughness.

[0004] Next, regarding the solidification technology of molten metal, the crystal structure and the crystal grain size change greatly depending on the cooling rate.
Especially when rapidly solidified, amorphous metal is obtained.
It is important to select the coolant and the cooling method.

Conventionally, as a coolant used in these cooling processes, gas, steam, mist, water, distilled water, oil, molten salt, lead, tin, and the like have been used. These cooling materials are stored in a container, and a metal material is immersed in the container to cool the material.

[0006] Further, a method of cooling by directly contacting a metal cooling roll or a cooling method using liquid metal sodium has been proposed.

However, in view of the fact that it can be used in large quantities as a coolant, the cost is low, waste liquid treatment is easy, and the flow rate, temperature and pressure when touching the metal material are easily adjusted, water, distilled water, mist, etc. Many water-based coolants are used.

In the wire drawing process of a piano wire or the like that requires high strength, patenting using lead, which can be rapidly cooled in a high temperature region, is often used.

In the production of amorphous metal,
Since the cooling rate is low in simple water cooling, a method of cooling by directly contacting a molten metal with a cooling roll has been adopted.

As for the heating method, a gas is burned in a radiant tube, the radiant tube is first heated, and the steel material is heated by radiant heat, or a batch type heating furnace is used.

[0011]

However, in the conventional cooling method using a coolant based on water, the value of the heat transfer coefficient is small, the cooling rate is not so fast, and the crystal grains and the structure are relatively small. There is a problem that it is large and does not contribute much to the improvement of strength and toughness.

Individually, gas cooling is easy in terms of equipment, but has the disadvantage that the heat capacity and cooling capacity of the gas itself are low. There are various types of molten salts, but the thermal conductivity is low, and therefore the cooling rate is low.
There is no one of the following types of molten salt that can be cooled at once, and when it is treated as a waste liquid, it contains various chemical substances, so there is a problem from the viewpoint of pollution prevention.

Molten metals such as lead and tin used for patenting wire rods must be used at a temperature higher than the melting point of the metal, so that it is difficult to cool them all at once to 300 ° C. or less. The cooling rate is also limited.

[0014] Speaking of lead, the thermal conductivity is lower than that of liquid metal sodium, and therefore, the heat removal performance is small, and rapid cooling is difficult. In addition, scales such as oxides are generated on the surface of the wire after cooling, so that a scale removing device is necessarily required. In addition, the waste liquid has a high possibility of causing pollution, there is a drawback that use and disposal conditions are severely restricted, and the cost is high. Tin also has the disadvantage of being more expensive.

Since these molten metals have a large specific gravity, they can be circulated by a pump or the like, blown out from a nozzle or the like and sprayed on steel or wire, or flow at a high flow rate to improve the heat transfer coefficient. It is difficult to increase the cooling rate. For this reason, since the steel or the wire is immersed in the molten metal stored in the container or the like for cooling, there is also a disadvantage that a large cooling rate cannot be obtained.

A heating / cooling method using liquid metal sodium as a coolant has also been proposed. In this method, liquid metal sodium is used as a coolant in a continuous steel sheet annealing apparatus. Therefore, for the major purpose of energy saving and improvement of thermal efficiency, the flow of the steel sheet and liquid metal sodium cools the liquid metal sodium during the temperature rise of the steel sheet and the liquid A temperature change pattern in which the temperature of metallic sodium is increased is taken. FIG. 7 shows this temperature change pattern. As can be seen from FIG. 7, since the temperature difference (ΔT) between the steel sheet temperature and the liquid metal sodium temperature cannot be made large in such a temperature change pattern, the cooling rate can be obtained. There is a disadvantage that it is difficult.

Water-based coolants such as steam, mist, water, and distilled water are easy to handle.
When cooling a steel material having a high temperature of not less than ℃, water evaporates instantaneously in the process of approaching the steel material surface to form a vapor film.
For this reason, since the droplet component having cooling ability does not directly contact the steel material surface, there is a disadvantage that heat removal performance is deteriorated and a large cooling rate cannot be obtained.

Further, in the conventional cooling method based on lead, water, or the like, a scale such as an oxide adheres to the surface of steel or a wire, and a step of removing the scale is always required after the cooling step. Further, the oil which has a disadvantage that the cooling performance is reduced due to the adhesion of the scale has an advantage that the boiling point is higher than that of water, but at 700 ° C. or higher, a vapor film is formed like water and the heat transfer coefficient is reduced. However, there is a drawback that the waste liquid treatment is expensive from the viewpoint of pollution prevention.

Conventionally, the advantages and disadvantages of the above-mentioned various coolants have been comprehensively evaluated, and water-based coolants such as water jet cooling, mist cooling and distilled water cooling have been widely used as coolants such as steel. ing. In the case of wires, a cooling method using lead is mainly used.

However, as described above, the conventional water-based coolant has the disadvantage that the cooling performance is reduced due to the formation of a vapor film, and the cooling rate near the transformation point of 700 ° C. or higher is low. The use of other coolants is restricted in terms of pollution control and price.

On the other hand, for steel or wire, which is the material to be heat-treated, there is a slight difference depending on the composition of the material.
There is a transformation point between 0 ° C and 900 ° C. When the cooling rate when passing through the transformation point is increased, the grain size and the structure become finer, and the steel material has higher strength and more excellent toughness.

As for the rapid solidification technique of molten metal, the method of spraying water or the like forms a vapor film around the high-temperature metal as described above, which reduces the heat transfer coefficient and makes rapid solidification difficult. In the method of spraying molten metal onto a rotating cooling roll to rapidly solidify it and obtain amorphous metal,
Since cooling is performed only from one side in contact with the cooling roll, a large cooling rate cannot be obtained, and as a result, there is a disadvantage that only a thin metal foil strip or a wire having a small wire diameter can be produced.

The present invention has been made in view of the above circumstances, and provides a metal material processing apparatus and method capable of miniaturizing or amorphizing a metal material, preventing pollution and reducing costs. The purpose is to do.

[0024]

A method for treating a metal material as a reference example of the present invention comprises a heating step of heating a solid metal material to a temperature higher than its transformation point; The liquid metal sodium for cooling is brought into contact with the surface, without forming a vapor film of the liquid metal sodium for cooling on the surface of the metal material, at a cooling rate of such an extent that the structure of the metal material can be refined, A cooling step of rapidly cooling the metal material to a temperature lower than the transformation point.

Preferably, in the heating step, the metal material is heated to a temperature of 700 ° C. or higher.

Preferably, in the cooling step, the liquid metal sodium for cooling is directly sprayed on a surface of the heated metal material.

Preferably, in the cooling step, the heated metal material is directly immersed in the cooling liquid metal sodium circulating in a cooling tank.

Preferably, in the heating step, the metal material is directly immersed in a heating liquid metal sodium at a temperature higher than the transformation point and heated.

Preferably, the metal material is rolled by a rolling roller immediately before and / or immediately after cooling the metal material with the cooling liquid sodium metal.

In the method for treating a metal material according to the present invention, the metal material is heated to a molten state, and the molten metal material is brought into contact with cooling liquid sodium metal.
The metal material is rapidly cooled and solidified, thereby forming an amorphous metal material.

Preferably, the contact between the molten metal material and the cooling liquid metal sodium is performed by continuously flowing the molten metal material into a container storing the cooling liquid metal sodium. Alternatively, the cooling is performed by directly spraying the cooling liquid metal sodium on the molten metal material that is continuously supplied, whereby the amorphous metal material is continuously formed.

The method for treating a metal material according to the present invention is directed to a method for treating a metal material in which the metal material is heated to a molten state, and the molten metal material is applied to a rotating cooling roll, cooled and solidified. The cooling liquid metal sodium is directly sprayed on the upper surface of the metal material solidified on the cooling roll to rapidly cool the metal material, thereby continuously forming an amorphous metal material.

Preferably, cooling liquid metal sodium is directly sprayed also between a surface of the cooling roll and a lower surface of the metal material solidified on the cooling roll to rapidly cool the metal material from both surfaces. I do.

Preferably, immediately after the molten metal material is solidified, controlled rolling is performed to refine the structure by rolling and to adjust the thickness and shape and dimension.

A reference example of the present invention relates to a metal material processing apparatus for performing a heating and cooling process on a continuously supplied metal material, wherein the metal material is heated to a temperature higher than its transformation point. Heating means, sodium injection means for spraying liquid metal sodium for cooling onto the surface of the metal material heated by the metal material heating means to rapidly cool the metal material, and after being rapidly cooled by the sodium injection means A cooling tank for storing cooling liquid metal sodium for immersing and cooling the metal material, and blowing an inert gas onto the surface of the metal material drawn out of the cooling liquid metal sodium in the cooling tank. Inert gas blowing means for removing the cooling liquid metal sodium adhered to the surface of the metal material, and the cooling liquid metal in the cooling tank Sodium circulating cooling means for and cooled by circulating thorium, characterized in that said cooling liquid metal sodium and a inert gas space isolated from the atmosphere.

Preferably, the metal material heating means heats the metal material to 700 ° C. or higher.

[0037] Preferably, said sodium circulating cooling means is arranged so that said cooling liquid metal sodium injected from said sodium injection means and flowing down into said cooling tank is moved along said moving direction of said metal material in said cooling tank. Flow in the same direction.

Preferably, the sodium circulating cooling means removes the liquid metal sodium for cooling from the vicinity of a position where the metallic material is drawn out of the liquid metal sodium for cooling in the cooling tank. After cooling and removing impurities, the mixture is returned to the sodium injection means.

Preferably, the metal material heating means circulates and heats a heating tank storing liquid sodium for heating at a temperature higher than the transformation point, and the liquid metal sodium in the heating tank. And a sodium circulation heating means, wherein the metal material is directly immersed in the heating liquid metal sodium in the heating tank and heated.

Preferably, the sodium circulating heating means removes the heating liquid metal sodium from the vicinity of a position where the metal material is drawn out of the heating liquid metal sodium in the heating tank. After heating and removing impurities, the metal material is returned to the heating tank in the vicinity of a position where the metal material is submerged in the heating liquid metal sodium in the heating tank.

A reference example of the present invention is directed to a metal material processing apparatus for hot and cold rolling of a continuously supplied metal material, wherein the upstream and downstream sides in the moving direction of the metal material are provided. The upstream rolling roll and the downstream rolling roll respectively disposed, and disposed between the upstream rolling roll and the downstream rolling roll, spraying a cooling liquid metal sodium on the surface of the metal material, Sodium injection means for rapidly cooling the metal material from a temperature higher than its transformation point to a temperature lower than the transformation point, and blowing an inert gas onto the surface of the metal material cooled by the sodium injection means, Inert gas jetting means for removing the cooling liquid metal sodium adhering to the surface of the metal material; and inert gas space for isolating the cooling liquid metal sodium from the atmosphere. Characterized by comprising a and.

[0042] Preferably, the apparatus further comprises a cooling container which contains the sodium injection means and the inert gas injection means and is isolated from the atmosphere, and a seal roll for carrying the metal material into the cooling container. And a sealing roll for carrying out the metal material from inside the cooling container is provided in the cooling container.

Preferably, a sodium circulating cooling means for taking out the cooling liquid metal sodium accumulated in a lower part of the cooling vessel out of the cooling vessel, performing cooling and removing impurities, and then returning to the sodium injection means is provided. Have more.

The apparatus for treating a metal material according to the present invention comprises: a crucible for containing a metal material in a molten state; a rotating cooling roll to which the metal material flowing out of the crucible is applied to a surface thereof; A sodium injection means for rapidly cooling the metal material by directly spraying liquid metal sodium for cooling on the upper surface of the metal material solidified by; and an inert gas space for isolating the liquid metal sodium for cooling from the atmosphere. It is characterized by having.

[0045] Preferably, the apparatus further includes an additional sodium injection means for directly spraying liquid sodium for cooling between the surface of the cooling roll and the lower surface of the metal material solidified on the cooling roll.

[0046]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment Hereinafter, an apparatus and method for processing a metal material according to a first embodiment of the present invention will be described with reference to FIG. In the present embodiment, a plate-shaped metal material will be described as an example. However, the present invention is not limited to a plate-shaped metal material, and can be applied to a rod-shaped or linear metal material.

The processing apparatus for a metal material according to the present embodiment
A heating tank (metal) for heating a steel material 1 as a metal material to a temperature higher than its transformation point as shown in FIG. (Material heating means) 2. This heating tank 2
Can heat the steel material 1 to 700 ° C. or more.

The apparatus also has a spray nozzle (sodium injection means) 5 for spraying liquid metal sodium for cooling onto the surface of the steel material 1 heated by the heating tank 2 to rapidly cool the steel material 1, and the spraying nozzle. A cooling tank 3 for storing a liquid metal sodium 4 for cooling in which the steel material 1 rapidly cooled by the nozzle 5 is immersed, moved, and cooled.

Further, the present apparatus sprays an inert gas onto the surface of the steel material 1 drawn out of the cooling liquid metal sodium 4 in the cooling tank 3 to cool the cooling liquid metal adhered to the surface of the steel material 1. A gas spray nozzle (inert gas jetting means) 12 for removing sodium 4 is provided, and an inert gas supply pipe 13 is connected to the gas spray nozzle 12.

Further, the present apparatus is provided with a sodium circulating cooling means 20 for circulating and cooling the cooling liquid metal sodium 4 in the cooling tank 3, and this sodium circulating cooling means 20 is sprayed from the spray nozzle 5. The cooling liquid metal sodium 4 is configured to flow in the cooling tank 3 in the same direction along the moving direction of the steel material 3.

More specifically, the sodium circulating cooling means 20 cools the cooling liquid metal sodium 4 from the vicinity of the position where the steel material 1 cooled in the cooling tank 3 is pulled up from the cooling liquid metal sodium 4. Suction-side pipe 7 taken out of tank 3, liquid metal sodium cooler 8 for cooling liquid metal sodium 4 taken out by suction side pipe 7, and impurity removing device 9 for removing impurities from liquid metal sodium 4 for cooling Spraying liquid metal sodium 4 for cooling after cooling and removing impurities
And a circulating pump 10 for circulating the cooling liquid metal sodium 4 from the suction side pipe 7 to the discharge side pipe 6.

The gas phase space inside the cooling tank 3 forms a cover gas space (inert gas space) 11 covered with an inert gas such as nitrogen or argon, and is cooled by a lid (not shown). The tank 3 is isolated from the surrounding atmosphere. The lid is provided with a steel material inlet and outlet provided with a seal mechanism so that air does not enter from the outside.

Next, a method of heating and cooling the steel material 1 by the metal material processing apparatus according to the present embodiment to refine the structure of the steel material 1 will be described.

First, the steel material 1 is heated to a predetermined temperature of 700 ° C. or more in the heating tank 2. After that, enter the cooling tank 3,
The cooled liquid metal sodium 4 coming out of the spray nozzle 5 is sprayed on the surface of the steel material 1 and cooled.

Here, since liquid metal sodium 4 is in a liquid state from 98 ° C. to 886 ° C., even when it comes into contact with steel 1 at 700 ° C. or higher, a vapor film of liquid metal sodium 4 is formed on the surface of steel 1. And a good heat transfer coefficient is ensured.

The liquid metal sodium 4 at the lowest temperature immediately after being cooled by the liquid metal sodium cooler 8
Is sprayed on the steel material 1 having the highest temperature immediately after being heated by the heating tank 2, so that the temperature difference between the steel material 1 and the liquid metal sodium 4 when they first contact each other can be made large.

As described above, the steel material 1 having the highest temperature is cooled by the liquid metal sodium 4 having the lowest temperature under a good heat transfer coefficient, so that an extremely high cooling rate, for example, about 10,000 degrees / second. It can be cooled at a stretch to 300 ° C. or less at a cooling rate of.

FIG. 2 is a graph showing the time change of the steel material surface temperature when the liquid metal sodium or water is sprayed on the steel material at 800 ° C. to cool the steel material. The dashed line shows the case of conventional cooling with water. As can be seen from FIG. 2, there is a large difference particularly in the cooling rate from 800 ° C. to about 600 ° C.

The liquid metal sodium 4 in the cooling bath 3
Flows in the same direction as the moving direction of the steel 1, the temperature change of the steel 1 and the liquid metal sodium 4 results in a co-current heat exchange pattern shown by a solid line in FIG. 3 and a direction shown by a dotted line in FIG. As compared with the flow type heat exchange pattern, a large temperature difference (ΔT) between the two at the time of the initial contact can be obtained.

Then, under such an extremely high cooling rate, the steel material 1 having a temperature higher than the transformation point (for example, about 700 ° C.) is instantaneously cooled to a temperature lower than the transformation point, whereby the structure of the steel material 1 is obtained. Can be miniaturized. Specifically, a particle size of about 10 μm to 1 μm can be achieved.

Subsequently, the steel material 1 is immersed in the liquid metal sodium 4 in the cooling bath 3, cooled to a predetermined temperature, and exits the cover gas space 11 where the gas spray nozzle 1
2 can be blown with inert gas. Thereby, the liquid metal sodium 4 adhering to the surface of the steel material 1 is removed,
After a while, it goes out of the cooling tank 3 to the atmosphere. As described above, since the liquid metal sodium 4 on the surface of the steel material 1 is removed before entering the atmosphere, the liquid metal sodium 4 does not burn in the atmosphere.

The liquid metal sodium 4 in the cooling bath 3
Flows out of the spray nozzle 5 and flows along the steel material 1 in the same direction as the flow of the steel material 1, flows out of a suction side pipe 7 provided at a position opposite to the spray nozzle 5, and flows out of the steel material 1. The temperature increased by the heat exchange is transferred to the liquid metal sodium cooler 8.
To remove impurities such as oxides, hydroxides, and carbides contained in the liquid metal sodium 4 by an impurity removing device 9, pressurized by a circulation pump 10, and discharged.
Circulated through.

The arrow (⇒) in the figure indicates the direction in which the steel material flows, and the arrow (→) indicates the direction in which the liquid metal sodium flows.

As described above, according to the apparatus and method for treating a metal material according to the present embodiment, the liquid metal sodium 4 is sprayed on the steel material 1 having a temperature higher than the transformation point, and extremely large cooling is performed to a temperature lower than the transformation point. Since the cooling is performed at the speed, the structure of the steel material 1 can be refined, whereby the steel material 1 having high strength and excellent toughness can be obtained. Specifically, conventionally, 100 μm to several tens
Where the particle size of about μm is the limit, according to the present embodiment, a particle size of about 10 μm to about 1 μm can be achieved.

Further, since the raw material for producing the liquid metal sodium 4 is a salt, it can be produced at a relatively low cost. Further, even after use, the waste liquid is neutralized with hydrochloric acid and used as ordinary waste water. Since the treatment is possible, there is no problem of pollution, and since the liquid metal sodium 4 is active, impurities such as oxygen, hydrogen and carbon are taken in by itself. No scales such as oxides are generated on the surface of No. 1 and, therefore, a conventionally required scale removing device becomes unnecessary,
Further, the economic efficiency is improved, and since it is not necessary to use various chemicals used for the scale removal, it is possible to prevent the occurrence of pollution from this point as well.

According to the apparatus and method for treating metal material according to the present embodiment, since the liquid metal sodium 4 in the cooling tank 3 flows in the same direction as the moving direction of the steel material 1, the steel material 1 and the liquid metal sodium The temperature change of 4 becomes a co-current type heat exchange pattern, and the temperature difference (ΔT) between the two at the time of initial contact
Can be made large, whereby the miniaturization of the steel material 1 can be achieved more reliably.

Second Embodiment Next, a metal material processing apparatus and method according to a second embodiment of the present invention will be described with reference to FIG. Note that components having substantially the same functions as those of the above-described first embodiment are denoted by the same reference numerals and described. In the present embodiment, a linear metal material will be described as an example. However, the present invention is not limited to a linear metal material, and can be applied to a metal material such as a band plate material.

As shown in FIG. 4, the metal material processing apparatus according to the present embodiment includes a heating tank (metal material heating means) 112.
And a cooling tank 3. As in the first embodiment described above, the cooling liquid metal sodium 4 is accommodated in the cooling tank 3, and the cooling liquid metal sodium 4 is separated by the sodium circulating cooling means 20 into a wire rod in the cooling tank 3. It flows in the same direction along the moving direction of 101.

The sodium circulating cooling means 20 includes a liquid metal sodium cooler 8, an impurity removing device 9, and a circulating pump 10. The cooling liquid having the lowest temperature immediately after being cooled by the liquid metal sodium cooler 8 is provided. The metallic sodium 4 is sprayed from the spray nozzle 5 toward the wire 101.

The cooling tank 3 has a U-shaped cross section, and seal rolls 103 are provided at the entrance and exit of the wire 101, respectively. The seal roll 103 on the exit side includes a gas spray nozzle 12 therein. An outlet gas space (inert gas space) 106 is connected to the outlet gas space 106. The outlet gas space 106 is shielded from the atmosphere by a seal roll 110,
The atmosphere is controlled by an inert gas.

At the downstream side of the outlet gas space 106, a cleaning tank 107 containing water or a neutralizing cleaning agent, and a converging device 108 for winding the processed wire 101 are arranged.

Further, the apparatus for treating a metal material according to the present embodiment is provided with a heating tank 112 as a heating means for the metal material, and the heating tank 112 has a heating liquid metal temperature higher than the transformation point of the wire 101. Sodium 113 is stored. Liquid metal sodium 11 for heating in heating tank 112
3 is circulated and heated by the sodium circulation heating means 111.

More specifically, the sodium circulating heating means 111 is a heating liquid taken out of the heating tank 112 from a position near the position where the wire 101 heated in the heating tank 112 is pulled up from the liquid sodium 113 for heating. Liquid metal sodium heater 109 for heating metal sodium 113, impurity removing device 9 for removing impurities from heating liquid metal sodium 113, and heating tank 1 for heating liquid metal sodium 113 after heating and impurity removal.
A circulation pump 10 for reflux is provided on the inlet side of the pump 12.

The heating tank 112 has a U-shaped cross section.
A seal roll 103 is provided at the entrance and exit of the wire rod 101.
Is provided. An inlet gas space (inert gas space) 104 is connected to the seal roll 103 on the inlet side. The inlet gas space 104 is shut off from the atmosphere by a seal roll 110, and the atmosphere is controlled by the inert gas.

On the upstream side of the seal roll 110 in the inlet gas space 104, a winding machine 102 in which a wire 101 before processing is stored is arranged.

Further, a heat retaining tank 105 is disposed between the heating tank 112 and the cooling tank 3.
Is connected to the outlet of the heating tank 112 and the inlet of the cooling tank 3 via seal rolls 103, 103. Insulation tank 1
05 is shielded from the atmosphere and controlled by an inert gas, and the temperature of the inert gas space is controlled so that the wire 101 passing through the inside is maintained at a constant temperature.

Next, the wire material 101 is heated and cooled by the metal material processing apparatus according to the present embodiment, and
A method for making the structure No. 01 finer will be described.

First, the wire 101 coming out of the winding machine 102 passes through the inlet gas space 104, enters the heating tank 112, and comes into direct contact with the heating liquid metal sodium 113 to exchange heat and reach a predetermined temperature. Insulation tank 1
Enter 05. In the heat retaining tank 105, the wire 101 is kept at a constant temperature for a predetermined time.

The wire 101 that has exited the heat retaining tank 105 is
And the liquid metal sodium 4 for cooling, which is discharged from the spray nozzle 5 and has the lowest temperature, is rapidly cooled. Thereafter, the wire 101 is immersed in the liquid metal sodium 4 in the cooling bath 3 and is maintained at a predetermined temperature for a predetermined time.

Thereafter, the wire rod 101 exits the cooling bath 3 and enters the outlet gas space 106. In order to remove and recover the liquid metal sodium 4 adhering to the surface, an inert gas is blown from the gas blowing nozzle 12 to remove the surface. The liquid metal sodium adhered to is removed. Thereafter, the wire 101 that has exited from the outlet gas space 106 further enters the cleaning tank 107, where it is washed and dried, and is wound up by the focusing device 108.

The liquid metal sodium 113 in the heating tank 112 exchanges heat with the wire 101, is cooled, flows out, passes through the impurity removing device 9, the circulation pump 10 and the liquid metal sodium heater 109, and rises to a predetermined temperature. Heated, heating tank 1
12 and is recycled. On the other hand, the liquid metal sodium 4 in the cooling tank 3 deprives the wire 101 of heat and becomes high temperature, exits the cooling tank 3, and returns to the cooling tank 3 via the liquid metal sodium cooler 8, the impurity removing device 9, and the circulation pump 10. Reused, circulating.

In order to ensure the safety of the present apparatus, the inlet gas space 104 is provided on the inlet side of the heating tank 112 in order to avoid direct contact between the liquid metal sodium and the atmosphere. Even if the liquid metal sodium 113 and its vapor flow out of the inlet gas space 104, it can be safely captured and recovered.

Further, from the outlet of the heating tank 112 to the inlet of the cooling tank 3 where the liquid metal sodium 4 may be attached to the surface of the wire 101, the atmosphere is shut off and the temperature is controlled by an inert gas. A tank 105 is provided.

As described above, according to the apparatus and method for treating a metal material according to the present embodiment, the same effects as those of the above-described first embodiment can be obtained, and the heating liquid metal sodium 113 in the heating tank 112 can be used. Since the wire 101 is heated, the configuration of the heating unit can be reduced in size, and a scale such as an oxide does not adhere to the surface of the wire 101 during heating. The removal device becomes unnecessary, and the wire 1
Since 01 can be heated, productivity is improved.

Third Embodiment Next, a metal material processing apparatus and method according to a third embodiment of the present invention will be described with reference to FIG. Note that components having substantially the same functions as those of the above-described first and second embodiments are denoted by the same reference numerals and described.

The processing apparatus for a metal material according to the present embodiment
This is an apparatus that performs hot and cold rolling while moving a metal material such as a steel material. As shown in FIG.
04 on the upstream side in the moving direction of the
And a press roll 201a thereof, and a downstream roll 202b and a press roll 201b thereof are disposed downstream.

Further, the present apparatus comprises an upstream rolling roll 202
a spray nozzle (sodium injection means) 5 that is disposed between a and the downstream rolling roll 202b and sprays the cooling liquid metal sodium 4 onto the surface of the metal material 204 to rapidly cool the metal material 204; A gas spray nozzle (inert gas jetting means) 12 for blowing an inert gas onto the surface of the metal material 204 cooled by the nozzle 5 to remove the cooling liquid metal sodium 4 attached to the surface of the metal material 204. And An inert gas supply pipe 13 is connected to the gas blowing nozzle 12.

Spray nozzle 5 and gas spray nozzle 12
Is enclosed in a cooling container 206 having a lid 205 and is isolated from the atmospheric space. In addition, seal rolls 203a and 203b are provided at the entrance and exit of the metal material 204 in the cooling vessel 206, respectively.

Further, the present apparatus is provided with a sodium circulation cooling means 2.
0, and the sodium circulation cooling means 20
A liquid metal sodium cooler 8, an impurity removing device 9, and a circulation pump 10 are provided. Then, the sodium circulating cooling means 20 takes out the cooling liquid metal sodium 4 accumulated in the lower part of the cooling vessel 206 out of the cooling vessel 206, and after cooling and removing impurities, returns to the spray nozzle 5.

Next, a method of heating and cooling the metal material 204 by the metal material processing apparatus according to the present embodiment to refine the structure of the metal material 204 will be described.

First, the metal material 204 that has been hot rolled to a predetermined thickness by the upstream rolling roll 202a such as a hot strip mill is supplied to the cover gas space 11 in the cooling tank 3.
Through the seal roll 203a and the metallic material 204
Is rapidly cooled by the liquid metal sodium 4 blown out from the spray nozzles 5 provided above and below.

Next, the liquid metal sodium 4 adhered to the surface of the metal material 204 by an inert gas coming out of a gas spray nozzle 12 also provided above and below the metal material 204.
Is removed from the cover gas space 11 through the seal roll 203b, and if necessary,
Rolled and wound by 2b.

On the other hand, the liquid metal sodium 4 discharged from the spray nozzle 5 is stored in a lower portion of the cooling vessel 206 or is transferred to a liquid metal sodium dump tank connected to a drain pipe (not shown) below the cooling vessel 206. The liquid metal sodium is cooled and cooled by a liquid metal sodium cooler 8, and impurities such as oxides, hydroxides, and carbides in the liquid metal sodium 4 are removed by an impurity removing device 9. 5 to be recycled and reused.

As described above, according to the apparatus and method for processing a metal material according to the present embodiment, the first and second metal materials described above are used.
The same effects as in the embodiment can be obtained, and the metal material 20
4 is rolled by rolling rollers 202a and 202b immediately before or immediately after being rapidly cooled with liquid metal sodium 4, thereby making the internal crystal structure of the metal material 204 physically fine and applying strain energy to the inside. In addition, the number of crystal nuclei after rolling can be increased, and the metal material 204 having finer crystals and texture can be formed.

Fourth Embodiment Next, an apparatus and a method for processing a metal material according to a fourth embodiment of the present invention will be described with reference to FIG. Note that components having substantially the same functions as those of the above-described first to third embodiments are denoted by the same reference numerals and described.

The apparatus for processing a metal material according to the present embodiment is suitable for producing an amorphous metal. As shown in FIG. 6, a crucible 301 for accommodating a metal material 302 in a molten state and a crucible 301 for the crucible 301 are provided. A rotating cooling roll 304 to which the metal material 302 flowing down from the outlet nozzle 303 is applied to the surface thereof. Cooling roll 3
04 is submerged in the liquid metal sodium 4 of the cooling bath 3 except for the upper end portion.

Further, in the present apparatus, the cooling liquid metal sodium 4 is directly sprayed on the upper surface of the metal material 305 solidified on the cooling roll 304 to rapidly cool the metal material 305.
Spraying nozzle (first sodium injection means) 5a,
A second spray nozzle (second sodium spraying means) 5b for directly spraying the cooling liquid metal sodium 4 between the surface of the cooling roll 304 and the lower surface of the metal material 305 solidified on the cooling roll 304; .

Further, this processing apparatus is provided with a sodium circulating cooling means 20 for circulating and cooling the cooling liquid metal sodium 4 in the cooling tank 3, and the sodium circulating cooling means 20 is provided with a cooling liquid metal sodium. Suction-side pipe 7 for taking out 4 from cooling tank 3, liquid metal sodium cooler 8 for cooling cooling liquid metal sodium 4 taken out by suction-side pipe 7, and impurities for removing impurities from cooling liquid metal sodium 4 Removing device 9 and discharge-side pipe 6 for returning cooling liquid metal sodium 4 after cooling and impurity removal to spray nozzles 5a and 5b
And a circulation pump 10 for circulating the cooling liquid metal sodium 4 from the suction side pipe 7 to the discharge side pipe 6.

Although not shown in FIG. 6, the cooling bath 3 is provided with a lid, and a cover gas space is provided above the liquid metal sodium 4 contained therein by an inert gas such as nitrogen or argon. 11 is formed, and a metal material 30 having a sealing mechanism is provided on the lid so that air does not enter from the outside.
There are 2,305 inlets and outlets.

Next, a method for continuously forming an amorphous metal material by the metal material processing apparatus according to the present embodiment will be described.

First, the metal 302 melted by the crucible 301 flows down from the outlet nozzle 303 and is cooled by the cooling roll 30.
At the same time as touching 4, the liquid metal sodium 4 ejected from the spray nozzles 5a, 5b rapidly cools and solidifies,
With the rotation of the cooling roll 304, the liquid enters the liquid metal sodium 4 filled in the cooling tank 3, is cooled to a predetermined temperature, and is carried out of the cooling tank 3.

The liquid metal sodium 4 in the cooling tank 3 is sent to the liquid metal sodium cooler 8 through the suction pipe 7 and cooled, and further impurities are removed by the impurity removing device 9 and pressurized by the circulation pump 10. And spray nozzle 5
a, 5b and are recycled.

As described above, according to the metal material processing apparatus and method according to the present embodiment, the molten metal material 3
02 flows down onto the cooling roll 304, and the cooling liquid metal sodium 4 is directly blown from both surfaces of the metal material 305 solidified on the cooling roll 304 to cool the metal material 302. There is no formation of a vapor film on the surface of the metal material which deteriorates the quality, and there is no scale adhesion, and it is inexpensive, and waste liquid collection and treatment after use are easy.

Then, a thicker strip-shaped or linear amorphous metal which cannot be obtained by the conventional method is continuously formed, or a metal material having finer crystals or structure is continuously formed. Can be.

As a modified example of the present embodiment, the solidified metal material 305 may be subjected to controlled rolling to refine the structure by rolling and to adjust the thickness and the shape and dimensions.

According to this modification, the crystal structure inside the solidified metal material is made physically finer, and at the same time, strain energy is applied to the inside, so that the crystal nuclei after rolling are increased, and finer crystals and structures are obtained. In addition, a metal material having a uniform thickness and shape can be obtained.

Fifth Embodiment Next, a method for processing a metal material according to a fifth embodiment of the present invention will be described. The method for treating a metal material according to the present embodiment is characterized in that a metal material in a molten state is brought into contact with a cooling liquid sodium metal to rapidly cool and solidify the metal material to form an amorphous metal material. I do.

The contact between the molten metal material and the cooling liquid metal sodium is performed by pouring the molten metal material into a container containing the cooling liquid metal sodium, or by contacting the molten metal material with the molten metal metal. This is performed by directly spraying liquid metal sodium for cooling.

According to the method for treating a metal material according to the present embodiment, by using liquid metal sodium as a coolant, a vapor film is formed on the surface of the metal material, which deteriorates the heat removal performance when cooling the metal material. Without,
There is no scale adhesion, it is inexpensive, and waste liquid collection and treatment after use are easy. Then, similarly to the above-described fourth embodiment, an amorphous metal material and a metal material having finer crystals and texture can be continuously formed.

[0110]

As described above, according to the method and apparatus for treating a metal material according to the present invention, liquid metal sodium is brought into contact with a molten metal material, rapidly cooled, and solidified to form an amorphous material. The metal material can be formed continuously.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a metal material processing apparatus according to a first embodiment as a reference example of the present invention.

FIG. 2 is a graph showing a time change of a steel material surface temperature when a liquid metal sodium or water is sprayed on a steel material at 800 ° C. to cool the steel material.

FIG. 3 is a graph showing fluid temperature change patterns of a heat exchanger of a co-current type in which a high-temperature fluid and a low-temperature fluid flow side by side in the same direction to exchange heat, and an AC type in which heat flows and heat exchanges in opposite directions.

FIG. 4 is a diagram showing a schematic configuration of a metal material processing apparatus according to a second embodiment as a reference example of the present invention.

FIG. 5 is a diagram showing a schematic configuration of a metal material processing apparatus according to a third embodiment as a reference example of the present invention.

FIG. 6 is a diagram showing a schematic configuration of a metal material processing apparatus according to a fourth embodiment of the present invention.

FIG. 7 is a graph showing a temperature change pattern of a steel sheet temperature and a liquid metal sodium temperature when liquid metal sodium is applied to a continuous annealing apparatus for heating and cooling a steel sheet.

[Explanation of symbols]

 Reference Signs List 1 steel material 2 heating tank (metal material heating means) 3 cooling tank 4 cooling liquid metal sodium 5, 5a, 5b spraying nozzle (sodium injection means) 8 liquid metal sodium cooler 10 circulation pump 11 cover gas space (inert gas) 12) Gas blowing nozzle (inert gas jetting means) 13 Inert gas supply system 20 Sodium circulation cooling means 101 Wire rod 103, 110, 203a, 203b Seal roll 104 Inlet gas space (inert gas space) 105 Heat insulation tank 106 Outlet gas space (inert gas space) 109 Liquid metal sodium heater 111 Sodium circulation heating means 112 Heating tank (metal material heating means) 113 Liquid metal sodium for heating 201a, 201b Pressing roll 202a, 202b Rolling roll 204, 305 Metal material 206 Cooling device 01 crucible 302 metal material 304 cooling roll in the molten state

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) C21D 9/52 102 C21D 9/52 102 104 104 F28C 3/08 F28C 3/08 Z

Claims (7)

[Claims] 1. A metal material is heated to a molten state, and the metal material in a molten state is brought into contact with cooling liquid sodium metal to rapidly cool and solidify the metal material, thereby forming an amorphous metal material. A method for treating a metal material, comprising forming a material. 2. The contact between the molten metal material and the cooling liquid metal sodium is performed by continuously pouring the molten metal material into a container storing the cooling liquid metal sodium, or 2. The method according to claim 1, wherein the cooling is performed by directly spraying the liquid metal sodium for cooling onto the molten metal material supplied in a molten state, whereby an amorphous metal material is continuously formed. A method for treating a metal material as described above. 3. A method for treating a metal material in which the metal material is heated to a molten state, and the molten metal material is applied to a rotating cooling roll, cooled and solidified, and solidified on the cooling roll. A method for treating a metal material, wherein a cooling liquid metal sodium is directly sprayed on an upper surface of the metal material to rapidly cool the metal material, thereby continuously forming an amorphous metal material. 4. A method of directly cooling liquid metal sodium for cooling also between a surface of the cooling roll and a lower surface of the metal material solidified on the cooling roll to rapidly cool the metal material from both surfaces. The method for treating a metal material according to claim 3, wherein: 5. The method according to claim 1, wherein, immediately after the molten metal material solidifies, controlled rolling is performed to refine the structure by rolling and to adjust the thickness and shape dimensions. A method for treating a metal material according to claim 1. 6. A crucible containing a metal material in a molten state,
The metal material flowing out of the crucible is applied to the surface thereof, and a rotating cooling roll, and the cooling liquid metal sodium is directly sprayed on the upper surface of the metal material solidified on the cooling roll to rapidly cool the metal material. An apparatus for treating a metal material, comprising: sodium injection means for cooling; and an inert gas space for isolating the liquid sodium metal for cooling from the atmosphere. 7. An additional sodium injection means for directly spraying cooling liquid metal sodium between a surface of the cooling roll and a lower surface of the metal material solidified on the cooling roll. 7. An apparatus for processing a metal material according to claim 6.