JPH10314896A - Production of amorphous metallic strip and device for containing molten metal for production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a producing method, by which at the time of producing an amorphous alloy thin strip by a liquid quenching method, even in the case of developing the variation in supplying quantity of molten metal into a tundish, the thin strip having good thickness precision can be produced in good productivity, and the tundish used for this producing method. SOLUTION: In this producing method, molten metal surface height (h) is controlled so that a ratio (L/h) of a length (L) in the vertical direction of a runner from the bottom surface positioned at the upper part of a runner forming layer in the tundish to a nozzle opening hole and the molten metal surface height (h) from the bottom surface becomes >=1.5. In the tundish used for this producing method and having the runner at the bottom part and connecting the nozzle with the runner, a ratio (L/H) of the length (L) in the vertical direction of the runner and a depth (H) from the uppermost part to the bottom surface in the molten metal containable range, is regulated to >=1.5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a molten alloy or a molten metal (these are collectively referred to as "molten metal").
Is continuously supplied from a molten metal container having a nozzle for ejecting molten metal (hereinafter, referred to as a “tundish”) onto a cooling substrate moving through the nozzle to form a ribbon (in a ribbon shape). A method of manufacturing an amorphous metal ribbon such as an amorphous alloy or an amorphous metal having a small difference between a sheet width and a sheet thickness, and a molten metal container used for carrying out this manufacturing method. Related to the device.

[0002]

2. Description of the Related Art When a ribbon is manufactured, a liquid quenching method is generally used. The liquid quenching method includes a single-roll method in which a molten metal is supplied onto a single high-speed rotating cooling roll to quench and obtain a ribbon, or a molten metal is placed between a pair of high-speed rotating cooling rolls. And quenching to obtain a thin metal strip.

A method for obtaining a ribbon by the liquid quenching method will be described with reference to, for example, a single roll method shown in FIG. In FIG. 3, a molten metal 2 is supplied to a tundish 3 so that the level of the molten metal is as constant as possible. On the bottom of this tundish 3 is a runner forming layer 8.
The intermediate nozzle 7 and the nozzle holder 6 are connected to the runner forming layer 8.

In the inside of the runner forming layer 8, the intermediate nozzle 7 and the nozzle holder 6, a runner 1 reaching the bottom surface 3f located on the runner forming layer 8 of the tundish 3 is formed. It communicates with the nozzle opening 5 of the nozzle 4 attached to the tip of the nozzle holder 6.

An example of the runner 1, the intermediate nozzle 7, the nozzle 4, and the nozzle opening 5 in the nozzle holder 6 is shown in an enlarged horizontal sectional view in FIG. In order to obtain a wide ribbon, the runner 1 in the nozzle holder 6 communicating with the nozzle opening 5 is formed wide.

By raising the tundish stopper 9 from the state shown in FIG. 3, the molten metal 2 in the tundish 3 moves from the nozzle opening 5 to the surface of the cooling roll 10 through the bottom opening 3o and the runner 1. The supply amount of the molten metal 2 that is jetted and jetted from the nozzle opening 5 onto the cooling roll 10 is controlled according to the static pressure of the molten metal in the tundish 3. The molten metal 2 ejected from the nozzle opening 5 is rapidly cooled on the surface of the cooling roll 10 to become a metal ribbon 11.

In FIG. 3, the molten metal 2 is ejected from the side of the cooling roll 6, but actually the molten metal 2 may be ejected not only from this position but also from a position directly above or obliquely. In FIG. 3, the cooling roll 10 is drawn at a scale larger than the scale of the tundish 3 to facilitate understanding of the entire apparatus.

When the ribbon 5 is obtained by, for example, the single roll method as described above, a change in the level of the molten metal in the tundish 3 immediately causes a change in the supply amount of the molten metal 2 jetted to the cooling roll 10. This causes variations in the thickness of the resulting metal ribbon 11.

A metal strip 11 having a large variation in sheet thickness is not preferable because it generally causes a problem when used as an industrial material. It is desirable that the thickness variation of the metal ribbon 11 be suppressed to about 5% or less. Therefore, in order to obtain a good ribbon having a small thickness variation, various measures have been taken so far, such as suppressing the variation in the supply amount of the molten metal to the tundish.

[0010]

However, in order to suppress the fluctuation of the supply amount of the molten metal to the tundish,
For this purpose, a large-scale apparatus is required, and an operation for making the supply amount uniform is often complicated. Therefore, it has been desired to develop a method for easily suppressing the influence on the thickness of the ribbon even if the supply amount of the molten metal to the tundish varies somewhat.

An object of the present invention is to provide a method for producing a ribbon having good thickness accuracy with good productivity even when the supply amount of molten metal to a tundish fluctuates, and to be used for carrying out this production method. To provide a tundish.

[0012]

The gist of the present invention is as follows. That is, (1) a molten metal is accommodated in a molten metal storage device having a runner at the bottom and a nozzle for ejecting the molten metal connected to the runner, and the cooling substrate moving through the runner and the nozzle. A method of producing a ribbon-shaped amorphous metal by continuously supplying the molten metal onto the cooling substrate, wherein the nozzle opening is formed from a bottom surface located on a formation layer of a runner of the molten metal container during casting. So that the ratio (L / h) of the vertical length (L) of the runner and the height of the molten metal from the bottom surface (h) of the molten metal container becomes 1.5 or more. A method for producing an amorphous metal ribbon, comprising controlling a surface height (h). (2) The vertical length (L) of the runner extending from the bottom surface of the molten metal storage device to the nozzle opening to be used is set to 200 mm or more and 1 m or less. (3) When a molten metal is continuously supplied onto a moving cooling substrate and rapidly cooled on the cooling substrate to produce a linear or ribbon-shaped amorphous alloy. Use,
In a molten metal storage device in which a nozzle for ejecting molten metal is connected to a runner at the bottom, a vertical length of the runner from the bottom surface on the runner forming layer where the runner is formed to the nozzle opening ( An amorphous metal, wherein a ratio (L / H) of L) to a depth (H) from an uppermost portion of the molten metal accommodating area in the molten metal accommodating device to the bottom surface is 1.5 or more. Molten metal container for thin ribbon production. And (4) the vertical length (L) of the runner from the bottom surface of the molten metal storage device to the nozzle opening is 200 mm or more and 1 m.
The molten metal container for producing an amorphous metal ribbon according to the above mode (3), characterized in that:

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION According to the production method of the present invention, a molten metal is continuously supplied onto a moving cooling substrate, quenched on the cooling substrate, and quenched on the cooling substrate. This is applied when a tundish having a runner at the bottom and connected with a nozzle for ejecting the molten metal is used in the production of a thin strip.) The runner in the tundish during casting is used. (The vertical distance of the runner from the bottom surface on the runner formation layer where the runner is formed to the nozzle opening) and the height of the runner surface. ing.

Further, the tundish of the present invention is a structural condition for satisfying all of the control range of the ratio of the vertical length of the runner to the level of the runner in the method of the present invention. The ratio of the length in the direction to the depth from the top to the bottom of the molten metal accommodating area in the tundish (the area where the molten metal can be accommodated from the bottom, hereinafter referred to as “molten metal accommodable area”). Characterized where identified, the actual structural conditions of this device are:
The ratio is set in accordance with the control conditions for the ratio of the vertical length of the runner to the level of the runner in the production method of the present invention.

More specifically, the term "tundish" as used in the present invention means that a runner forming layer (for example, refractory brick) is provided at the bottom to form a runner having a vertical length.
It is a tundish to which a nozzle for ejecting a molten metal onto a cooling substrate is connected. The tundish may have a dissolving function.

Hereinafter, the production method and the tundish of the present invention will be specifically described with reference to FIGS. In the example of the single roll apparatus to which the present invention is applied, as shown in FIG. 1, the molten metal 2 held in the tundish 3 is cooled at a high speed through the runner 1 and the nozzle opening 5 of the nozzle 4. When the thin strip 11 is jetted on the surface of the roll 10 and cast on the surface of the cooling roll 10 to obtain the ribbon 11, from the bottom surface 3 f of the tundish 3 located on the runner forming layer 8 to the runner 1 reaching the nozzle opening 5 ( Here, the length in the vertical direction up to the inner surface bottom of the horizontal portion (hereinafter, simply referred to as “vertical runner length”) (L)
And the height (L / h) of the water level from the bottom surface 3f in the tundish 3 (hereinafter simply referred to as “water level”) (h).
Is set to 1.5 or more throughout the casting from the start to the end of casting. Here, the runner 1 extending from the bottom surface 3f of the tundish 3 to the nozzle opening 5 is formed by connecting holes formed in the runner forming layer 8, the intermediate nozzle 7, and the nozzle holder 6.

Prior to the start of casting, for example, the tundish stopper 9 is lowered, and the bottom of the tundish 3
f, the molten metal 2 is prevented from flowing out to the runner 1. From this time, the molten metal height (h) from the bottom surface 3f is adjusted so that the value of L / h becomes 1.5 or more. ) Is set. Then, from the start to the end of casting, the surface level control is performed so that the value of L / h is maintained at 1.5 or more. In addition,
In FIG. 1, the cooling roll 10 is drawn at a scale larger than the scale of the tundish 3 to facilitate understanding of the entire apparatus.

Here, the reason why the value of L / h is limited to 1.5 or more will be described. The present inventors focused on the value of L / h in a tundish during casting, and performed casting experiments while changing the value of L / h. As a result, by making the vertical runner length (L) larger than the level (h), the effect of the level (h) on the amount of molten metal jetted from the nozzle is reduced, and When the runner length (L) is set to 1.5 times or more the surface height (h), it is found that the effect of the surface height in the tundish on the amount of molten metal spouted is almost completely eliminated. Was. This is the reason for limiting the value of L / h to 1.5 or more in the manufacturing method of the present invention.

The supply of the molten metal 2 to the tundish 3 is performed, for example, from a ladle (not shown) holding the molten metal 2 through a long nozzle (not shown) or by tilting. In the present invention, it is not necessary to devise a method for suppressing a change in the supply amount particularly when supplying the molten metal from the ladle. However, the degree of the change in the supply amount is grasped in advance, and even if the supply amount of the molten metal from the ladle during casting fluctuates to the maximum, the vertical runner length (L) and the level of the molten metal (h) are used. ) Needs to be set so that casting can be performed while maintaining the ratio (L / h) of 1.5 or more.

In the manufacturing method of the present invention, the amount of molten metal jetted from the nozzle opening 5 is controlled by the total length of the level of the molten metal (h) and the length of the vertical runner (L). Therefore,
If the total length is too large, the supply rate of the molten metal from the nozzle opening increases, so that the cooling rate of the ribbon decreases, making it difficult to obtain a favorable ribbon. From this point,
The total length of the surface level (h) and the length of the vertical runner (L) is 1m
It is preferred that: Therefore, even if casting is performed so as to minimize the level of the molten metal, the length of the vertical molten metal (L) cannot exceed 1 m.
Is preferably 1 m or less.

On the other hand, if the total length of the molten metal level (h) and the length of the vertical runner (L) is too small, the static pressure of the molten metal in the tundish 3 decreases, and the molten metal is ejected from the nozzle opening. However, since a good ribbon cannot be obtained due to a local break in the width direction of the ribbon, it is difficult to obtain a stable molten metal static pressure. The total length is preferably 200 mm or more. In addition, in order to improve the yield by casting all of the molten metal in the tundish, it is effective to obtain the molten metal static pressure until a small amount is obtained. The length (L) is preferably 200 mm or more. The preferred combination of the surface level (h) and the vertical runner length (L) and other preferable casting conditions will be described in detail in Examples below.

According to the production method of the present invention, since the molten metal can be cast until it reaches the bottom of the tundish, it is possible to produce a good ribbon with good productivity. Further, the tundish used for carrying out the production method of the present invention includes a vertical runner length (L) and the bottom 3f from the top of the molten metal accommodable region in the tundish.
The ratio (L / H) of the depth (H) up to 1.5 or more may be used.

Although the production method of the present invention can be realized by various tundishes, all the conditions specified by the production method of the present invention can be reliably realized by using the tundish of the present invention. The preferred dimensions and materials for the tundish will be specifically described in Examples below.

In FIG. 1, the runner 1 has a shape bent vertically from a horizontal portion, but the present invention is not limited to this shape. For example, the runner 1 as shown in FIG. 2 (A) may be formed diagonally. In this case, the value of the vertical runner length L is from the bottom surface 3f to the inner surface bottom of the horizontal part of the runner 1. The projection length in the vertical direction. Also,
A step-like runner 1 as shown in FIG. 2B may be used. In this case, the value of the vertical runner length L is the vertical length from the bottom surface 3f to the inner bottom surface of the horizontal portion on the lower side of the runner 1. (L1 + L
2).

Further, in FIG. 1, FIG. 2 (A) and FIG. 2 (B), the molten metal is ejected from the side of the cooling roll. However, actually, the molten metal is ejected from directly above or at an oblique position. Sometimes. For example, as shown in FIG. 2C, when the molten alloy is ejected from directly above, the value of the vertical runner length L when the runner 1 is formed straight is determined from the bottom surface 3f of the tundish. Runner 1 leading to nozzle opening 5
Is the length up to the lower end. In the manufacturing method of the present invention, the length of the runner 1 in the horizontal direction is not particularly limited. However, the length of the runner in the horizontal direction should not be too long in consideration of preheating before the start of casting. Further, the sectional shape and the sectional area of the runner are not particularly limited. The runner may be formed, for example, by a commonly used round hole.

As described above, the basic ribbon manufacturing apparatus employed in the present invention is a liquid quenching apparatus in which molten metal is ejected through a nozzle onto a cooling substrate and rapidly solidified by thermal contact. And a ribbon manufacturing apparatus using a single roll as a cooling substrate and a ribbon manufacturing apparatus using a twin roll as a cooling substrate. Single-roll ribbon manufacturing equipment includes centrifugal quenching equipment that uses the inner wall of the drum, equipment that uses endless belts, and improved versions of these equipment, such as auxiliary rolls and roll surface temperature control equipment, or decompression. Also included are devices for casting below or in a vacuum or in an inert gas.

Next, the casting conditions employed in the manufacturing method of the present invention and specific casting operations will be described. The jet pressure of the molten alloy is 0.01 to 3 kg / cm ² and is set mainly using the length of the vertical runner (L) and the height of the molten metal (h). The rotation speed (surface speed) of the cooling roll is 5 to 60 m
/ Second range. For these conditions, optimal values are selected according to the type of metal to be used, the thickness of the target ribbon, and other manufacturing conditions.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. Example 1 A ribbon was produced from Fe—B ₁₂ —Si _6.5 —C ₁ (atomic%) using a single roll ribbon manufacturing apparatus as shown in FIG. As shown in FIG. 1, the tundish 3 is made of a zircon-based material by disposing a runner-forming layer (brick) 8 made of alumina at the bottom in a castable manner and has a length of 300 mm and a width of 500 mm. It had a substantially rectangular cross section, a height of about 800 mm, and a depth of 290 mm from the top of the molten metal housing area to the bottom face 3f.

The runner forming layer 8 was provided with a (reverse) L-shaped circular hole having a diameter of 20 mm at the center. An intermediate nozzle 7 made of silica is mounted next to the runner forming layer so that the two round holes are aligned with each other, and a nozzle holder made of alumina graphite in which a nozzle 4 made of silicon nitride is embedded at the tip of the intermediate nozzle 7. 6 was attached.

The nozzle holder 6 is provided with a round hole at the center, but the intermediate nozzle 7 side is formed as a round hole similar to that provided in the intermediate nozzle, and the nozzle is inserted as a wide rectangular hole toward the nozzle 4. Size. The size of this nozzle is a rectangular parallelepiped of 200 × 20 × 25 mm, and this nozzle has two 120 × 0.7 mm rectangular holes at 1.5 mm intervals.
The openings 5 are provided in a row.

The height of the runner forming layer 8 is 500 mm from the upper surface of the bottom plate of the tundish, and the round hole which becomes the runner 1 formed in this runner forming layer has a vertical length of 450 mm.
The horizontal length was 150 mm. Therefore, the vertical runner length (L) of the used tundish 3 is 450 mm, and the depth (H) from the top of the molten metal storage area to the bottom 3o is 2 mm.
Since it is 90 mm, (L / H) was 1.55.

Melting furnace by high frequency induction method (not shown)
The molten metal obtained in the above is charged into a ladle (not shown), and at the start of casting, the molten metal is supplied from the ladle to the tundish 3 by tilting, and when the surface level (h) reaches 200 mm. Then, the tundish stopper 9 was raised, and the opening of the opening 3o was set to the set opening to start casting.

The angle of the ladle was controlled so that the surface level (h) during casting was always 250 mm or less. This level of control is also possible with a normal tilting system. The surface of molten metal 2 in the tundish is almost tundish 3
When the bottom 3f was reached, the casting was terminated.

[Other ribbon production conditions]-Temperature of molten metal in tundish at pouring: 1350 ° C-Surface speed of cooling roll during casting: 25 m / s-Gap between nozzle and cooling roll: 0.3 mm

As a result, a strip having good properties and a width of about 120 mm was obtained until the casting was completed. Each of the obtained ribbons has a length 2 at 20 positions at equal intervals in the longitudinal direction.
Five-meter samples were taken and the weight of each sample was measured. Each sample is about 1.2kg,
When the thickness of the ribbon was measured from this weight, the thickness of the ribbon was about 55 μm. That is, it was found that the ribbon had a uniform thickness in the longitudinal direction.

On the other hand, when the level of the molten metal surface (h) was measured during casting, it was found that the molten metal surface height (h) was in the range of 160 mm to 240 mm except at the end of casting. That is, the value of the ratio (L / h) of the vertical runner length (L) and the surface level (h) of the used tundish is at least 1.9,
It turns out that it was 1.5 or more from beginning to end. From this result, when the ratio (L / h) of the length of the vertical runner (L) to the height of the metal surface (h) is 1.5 or more, the dimensional accuracy is maintained even if the height of the metal surface in the tundish varies. It was found that a thin ribbon having a good value was obtained at a high yield.

Example 2 The production of a ribbon was attempted using the single-roll ribbon production apparatus used in Example 1. The casting conditions were all the same except for the casting surface height (h) at the start of casting and during casting. At the start of casting, molten metal is supplied from the ladle to the tundish 3 by tilting, and the molten metal level (h) is 1
When the diameter reached 60 mm, the tundish stopper 9 was raised, and the opening of the opening 3o was set to the set opening to start casting.

The angle of the ladle was controlled so that the surface level (h) during casting was always 200 mm or less. This level of control is also possible with a normal tilting system. The molten metal surface in tundish 3 is almost tundish 3
The casting was terminated when the bottom surface 3f was reached.

As a result of casting, a ribbon having a good property and a width of about 120 mm was obtained until the end of casting. Samples each having a length of 25 m were collected at 20 positions at equal intervals in the longitudinal direction of the ribbon, and the weight of each sample was measured. Each sample weighed about 111 kg, and when the thickness of the ribbon was measured from this weight, the thickness of the ribbon was approximately 51 μm. That is, it was found that the ribbon had a uniform thickness in the longitudinal direction.

On the other hand, it was found that the molten metal surface height (h) during casting was in the range of 120 mm to 200 mm except at the end of casting. That is, since the vertical runner length (L) of the tundish used was 450 mm, the ratio (L / L) of the vertical runner length (L) and the surface level (h) of this tundish was used.
It can be seen that the value of h) was at least 2.25 and 1.5 or more throughout. From this result, when the ratio (L / h) of the vertical runner length (L) to the surface level (h) of the tundish is 1.5 or more, the supply amount of the molten metal to the tundish varies. It was found that even if this occurs, a ribbon with a high yield and good dimensional accuracy can be obtained.

[Comparative Example] Production of a ribbon was attempted using the same single-roll ribbon production apparatus as in Example 1. However, the tundish 3 used had the same structure as that used in Example 1, but only the height of the runner forming layer 8 was changed to 22.
0mm, and the bottom 3f from the top of the molten metal storage area
With a depth (H) of 570 mm.

The round hole provided at the center of the runner forming layer 8 had a vertical length of 170 mm and a horizontal length of 150 mm. Vertical runner length (L) of tundish 3 is 170mm
And (L / H) was about 0.3.

At the start of casting, molten metal is supplied from the ladle to the tundish 3 by tilting, and the molten metal level (h) is 200.
mm, raise the tundish stopper 9
The casting was started by setting the opening of the opening 3o to the set opening. The angle of ladle decanting was controlled so that the surface level (h) during casting was always 250 mm or less. This level of control is also possible with a normal tilting system.

When the level (h) of the molten metal becomes about 30 mm, the static pressure of the molten metal in the tundish decreases and the nozzle 4
Since the supply of the molten metal 2 from the tank became unstable, the casting was stopped, and the molten metal 2 remaining in the tundish 3 had to be discarded. The other casting conditions were the same as in Example 1. As a result of casting, about 1
Although a ribbon having a width of 20 mm was obtained, the ribbon at the end of casting had poor edges and elongated hole-like defects.

Samples each having a length of 25 m were taken at 20 positions at equal intervals in the longitudinal direction of the obtained ribbon, and the weight of each sample was measured. The weight of the sample was 0.78 kg to 0.98 kg. When the thickness of the ribbon was measured from this weight, the thickness of the ribbon was approximately 36 μm to 4 μm.
The distribution was in the range of 5 μm. The distribution of the thickness of the ribbon spread throughout the casting, but the thickness of the sample was particularly small in the sample at the end of casting.

On the other hand, it was found that the surface level (h) during casting was in the range of 160 mm to 240 mm except for the end of casting. That is, the value of the ratio (L / h) of the vertical runner length (L) to the surface level (h) of the tundish 3 is in the range of 0.7 to 1.1 except for the end of casting. I couldn't keep more than 1.5 throughout. From this, if the ratio (L / h) of the vertical runner length (L) and the surface level (h) of the tundish cannot be maintained at 1.5 or more,
The thickness of the ribbon changes with the variation of the supply amount of the molten metal to the tundish, and it becomes difficult to manufacture the ribbon with good dimensional accuracy. In addition, the yield at the time of production is reduced due to the presence of a large amount of residual hot water that cannot be cast.

[0047]

As described above, by employing the method and the tundish of the present invention, it is possible to supply the molten metal to the tundish without any special measures.
Even if a normal supply method in which the supply amount fluctuates is used, it is possible to manufacture a ribbon with good plate thickness accuracy. Furthermore, since the remaining molten metal supplied to the tundish can be reduced into a good ribbon by reducing the amount of the remaining molten metal, productivity and yield can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram (side sectional view) illustrating an example of a single roll ribbon manufacturing apparatus that implements an example of a ribbon manufacturing method of the present invention and a tundish structure used.

FIGS. 2A to 2C are schematic views (sides) for explaining another example of a tundish runner used in an example of a single-roll ribbon manufacturing apparatus for implementing a ribbon manufacturing method according to the present invention. Sectional view).

FIG. 3 is a schematic diagram (side sectional view) illustrating an example of a single-roll ribbon manufacturing apparatus for performing a conventional single-roll method, which is one of the liquid quenching methods.

4A is an enlarged schematic view (horizontal sectional view) illustrating an example of forming a tundish runner and a nozzle opening in the example of the single roll ribbon manufacturing apparatus in FIG. 3, and FIG. FIG. 2 is a schematic diagram (front view) illustrating the opening shape of the nozzle in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Runner 2 Molten metal 3 Tundish 3o Opening 3f Bottom surface 4 Nozzle 5 Nozzle opening 6 Nozzle holder 7 Intermediate nozzle 8 Runner forming layer 9 Tundish stopper 10 Cooling roll 11 Metal strip (thin strip)

Claims (4)

[Claims] 1. A cooling substrate which is accommodated in a molten metal container having a molten metal having a runner at a bottom and a nozzle for ejecting a molten alloy connected to the runner, and moving through the runner and the nozzle. A method of producing a ribbon-shaped amorphous metal by continuously supplying the molten metal onto the cooling substrate, wherein the nozzle opening is formed from a bottom surface located on a formation layer of a runner of the molten metal container during casting. The vertical length (L) of the runner leading to
Metal surface height (h) from the bottom surface of the molten metal container
The height (h) of the molten metal is controlled so that the ratio (L / h) becomes 1.5 or more. 2. A vertical length (L) of a runner from the bottom surface of the molten metal container used to the nozzle opening.
2. The method for producing an amorphous metal ribbon according to claim 1, wherein the thickness is 200 mm or more and 1 m or less. 3. A molten metal jetting method for continuously supplying molten metal onto a moving cooling substrate, and rapidly cooling the molten metal onto the cooling substrate to produce a ribbon-shaped amorphous metal. In the molten metal storage device connected with the nozzle of
The vertical length (L) of the runner from the bottom surface on the runner formation layer where the runner is formed to the nozzle opening, and the top of the molten metal accommodable area in the molten metal accommodation device. A molten metal container for producing an amorphous metal ribbon, wherein a ratio (L / H) of a depth (H) to the bottom surface is 1.5 or more. 4. A vertical length (L) of a runner from the bottom surface of the molten metal container to the nozzle opening is 200 mm.
The molten metal container for producing an amorphous metal ribbon according to claim 3, wherein the molten metal container is at least 1 m or less.