WO2015159562A1

WO2015159562A1 - Cooling roller and manufacturing device for amorphous alloy foil strips

Info

Publication number: WO2015159562A1
Application number: PCT/JP2015/050687
Authority: WO
Inventors: 駿佐藤; 吉男中村
Original assignee: Ｓａｃｏ合同会社
Priority date: 2014-04-18
Filing date: 2015-01-13
Publication date: 2015-10-22
Also published as: US20170029924A1; JP2015205290A; JP5953618B2

Abstract

This cooling roller (11) is characterized in that flow passages (21a, 21b, 21c), which pass through side surfaces of the cooling roller along the direction of a rotating shaft of the cooling roller, are arranged equidistantly on at least two concentric circles centered on the rotating shaft. This manufacturing device (2) for amorphous alloy foil strips is characterized by comprising the cooling roller (11). It is thus possible to manufacture thick amorphous alloy foil strips on an industrial scale.

Description

Apparatus for manufacturing cooling roll and amorphous alloy foil strip

The present invention relates to a cooling roll for producing an amorphous (amorphous) alloy foil strip, and an apparatus for producing an amorphous alloy foil strip. In particular, the present invention relates to an apparatus for manufacturing an amorphous alloy foil strip provided with a water cooling type cooling roll.

Conventionally, it has been studied to use an iron-based amorphous alloy with low power loss for the iron core of a transformer or a motor, and the practical use of a transformer has been advanced. However, the application to piled iron core transformers has not been reported yet, and even manufacturers that adopt piled iron cores have a second leg to adopting amorphous materials. Further, with regard to motors, there has been little progress in commercialization, and there are some cases where conventional thin (plate thickness of 30 μm or less) foil strips are applied by devising devices.

If thick amorphous alloy foil strips are manufactured at low cost industrially, application to not only wound core type transformers / reactors but also to piled iron cores and motors becomes possible. By increasing the thickness of the foil strip, in the wound iron core type transformer, the working efficiency of the iron core processing step is improved and the space factor is increased. This reduces the volume of the core, and thus the coil containing the winding. By thickening, the hysteresis loss is reduced, and in the commercial frequency range, the reduction effect of the iron loss which is more than offsetting the increase of the eddy current loss can be expected. Thickening the foil can not only reduce power loss but also increase strength. With a motor that rotates at high speed, it is possible to realize an unprecedented product that can withstand strong centrifugal force acting on the rotor.

The most common method of producing an amorphous alloy is to contact the molten metal of the alloy with the outer peripheral surface of the roll through a nozzle while rotating a cooling roll made of metal or alloy having high thermal conductivity. This is a so-called single roll liquid quenching method in which a molten alloy is rapidly cooled and solidified into a foil band. The single roll liquid quenching method is a method of rapidly quenching the molten metal by moving the heat of the molten metal to a cooling roll at high speed, and solidifying the molten metal before it crystallizes to produce an amorphous alloy foil strip. Here, the term "amorphous alloy" includes a double phase alloy in which 50% or more of the volume ratio is amorphous and the balance is amorphous and the nano-sized crystallites are dispersed and precipitated. In addition, even in a material in which 50% or more is crystalline, the manufacturing apparatus and method of the present invention can be used to control crystal grains. Specifically, it is effective for controlling the grain size of a permanent magnet containing neodymium boron.

In the single roll liquid quenching method, the temperature of the cooling roll increased with the production of the amorphous alloy foil strip, and the heat received from the molten metal and the heat discharged from the cooling roll to the cooling water were balanced. By the way, we reach equilibrium. If the surface temperature of the cooling roll in this equilibrium state is low enough to solidify the molten metal in a supercooled state, it is possible to continuously produce an amorphous alloy foil strip. However, amorphous foil strips can only be produced within a finite time if the cooling rate before the roll temperature overheats and passes the glass transition does not reach the predetermined cooling rate during casting .

In the production of a thick amorphous alloy foil, the amount of heat proportional to the thickness of the foil must be transferred to the cooling roll. However, the amount of heat that can be discharged to the cooling water in contact with the inner surface of the cooling roll is limited. The cooling structure of the water-cooled roll so far is configured by the outer peripheral surface of the roll and the cooling water channel flowing along the circumferential direction as shown in the known examples (

patent documents

1, 2 and 3).

Moreover, although the patent document 4 has arrange | positioned the cooling flow path which penetrates the side of a roll, the flow path which contributes to cooling of a roll has an inadequate heat removal capacity only in the flow path on the concentric circle of outermost periphery. It is. The flow path located on the second concentric circle from the outer periphery is provided for temperature control and has no cooling device.

The conventional cooling roll has a limitation in the amount of heat per unit time that the cooling water can discharge. The reason is that the area of the cooling channel above the area corresponding to the outer peripheral surface of the roll could not be obtained. For this reason, there is a limit to the thickness obtained in the amorphous state under a constant width.

The method for producing an amorphous alloy foil strip having a plate thickness exceeding the plate thickness (25 to 30 μm in the current commercially available material) which has been limited so far (industrial production scale, eg, 100 kg or more per charge) is

patent document

1, 2, 3).

These methods are methods for continuously producing an amorphous foil strip having a thickness exceeding 30 μm of the thickness limit (industrial production scale) of conventional amorphous alloy foils. However, since these methods use a plurality of cooling rolls, there is a problem that the equipment becomes large. In addition, it is complicated to repeat the molten metal pouring alternately with two cooling rolls, which complicates the operation.

Recently, a highly durable nozzle material has been found to discharge the molten alloy onto the outer peripheral surface of the cooling roll. Using this nozzle, continuous casting is possible for several hours. The possibility of continuously producing thick amorphous alloy foil strips even with a single cooling roll has emerged, without depending on the alternating casting method of Patent Documents 1 to 3.

Patent No. 5114241 gazette Patent No. 5270295 gazette Patent No. 5329915 gazette JP, 2012-086232 gazette

An object of the present invention is to provide an apparatus for producing an amorphous alloy foil strip, which enables production of an industrial scale (100 kg or more per charge) using a thick amorphous alloy foil strip and a single cooling roll. It is. The thickness of the thick amorphous alloy foil marketed today was limited to 30 μm or less. It is an object of the present invention to propose a technique for continuously producing an amorphous foil strip thicker than 30 μm by breaking this limitation.

The present invention specifies the structure of the cooling water flow path of the cooling roll in order to continuously produce a thick amorphous alloy foil strip using a single cooling roll. Specifically, in order to obtain an amorphous alloy having a desired thickness, a cooling roll structure capable of securing the surface area of the in-roll cooling water passage is provided.

According to the present invention, an apparatus for producing an amorphous alloy foil strip capable of producing a thick amorphous alloy foil strip on an industrial scale can be realized. As a result, the production cost can be reduced, and the miniaturization of applied products can be realized by the improvement of space factor. In addition, core loss (iron loss) is reduced, which contributes to energy saving. When annealing is performed on a magnetic core used by winding and stacking, uniformity of the temperature in the core can be realized. Heat flows from the edge to the inside from the interlayer. Annealing conditions can be optimized because temperature uniformity can be realized. Since the temperature across the core is equal within a narrow range, optimum conditions are achieved for each part of the core and optimum characteristics can be easily achieved.

It is a perspective view which illustrates the manufacturing device of the amorphous alloy foil strip concerning a 1st embodiment. BRIEF DESCRIPTION OF THE DRAWINGS (a) Front view and (b) Side view which illustrate the apparatus of 1st Embodiment. (A) is a schematic diagram which saw the apparatus concerning the modification of 1st Embodiment from the front of a cooling roll, (b) is the through-hole entrance part which attached collar-like protrusion from the side of a cooling roll It is a view. It is a schematic diagram which illustrates the cooling channel structure of the cooling roll in 2nd Embodiment. (A) is a schematic front view which illustrates the manufacturing apparatus of the amorphous alloy foil strip in 2nd Embodiment, and shows one of a cooling channel system. (B) is a schematic side view illustrating the cooling roll and the vicinity thereof, and (c) is a front view showing another cooling channel system of the cooling roll. It is a side view which illustrates the manufacturing device of the amorphous alloy foil strip concerning the modification of a 2nd embodiment. It is a side view which illustrates the appearance (paddle) of the nozzle tip which a molten alloy contacts with a cooling roll in FIG. It is a conceptual diagram which shows the double slit nozzle and paddle vicinity which are based on this invention. FIG. 1 is a front view of an apparatus illustrating a twin cooling roll method used in producing a large thickness amorphous alloy foil strip that can not be achieved with a single roll of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the first embodiment will be described.
FIG. 1 is a perspective view illustrating an apparatus for manufacturing an amorphous alloy foil strip according to the present embodiment,
FIG. 2: is the front view which illustrated the (a) cooling roll and the cooling channel of the manufacturing apparatus which concerns on this embodiment, (b) It is a side view of a cooling roll.

As shown in FIG. 1, in the apparatus 1 for manufacturing an amorphous alloy foil strip according to the present embodiment, a cooling roll 11, cooling water supply means 12 for circulating cooling water in the cooling roll 11, and a cooling roll 11. The driving means 13 (including the draining means) for rotating the metal and the molten metal supply means 17 for supplying the molten metal to the outer peripheral surface 11 a of the cooling roll 11 are provided. The molten metal supply means 17 is provided with a melting furnace 14 for melting the alloy, a crucible 15 for holding the molten metal A, and a nozzle 16 attached to the bottom of the crucible 15 for discharging the molten metal in the crucible 15 downward. There is. The nozzle 16 is disposed above the cooling roll 11 with a slight gap from the outer circumferential surface 11 a of the cooling roll 11. The manufacturing apparatus 1 is an apparatus for manufacturing the amorphous alloy foil strip S. Here, “amorphous alloy” is a double phase in which 50% or more of the volume ratio is amorphous, and the remaining part is amorphous and used as a matrix to disperse and deposit fine crystals of nanometer (nm) size. Contains alloys.

Next, the operation of the apparatus for producing an amorphous alloy foil strip constructed as described above, that is, the method for producing an amorphous alloy foil strip according to the present embodiment will be described.
First, in the melting furnace 14, the alloy to be the raw material of the amorphous alloy foil strip S is melted and the molten metal A is poured into the crucible 15. The molten metal A contains 70 atomic percent to 95 atomic percent in total of at least one of Fe, Co, and Ni, and at least one of semimetals B, Si, C, and P other than the three ferromagnetic metal elements. Containing 5 atomic% to 30 atomic% of the elements of Furthermore, at least one of Cr, V, Nb, Mo, W, Ta, Cu, and Sn may be added in a range of 0.01 atomic% to 5 atomic% to part of the ferromagnetic elements described above. Needless to say, the total content of constituent elements must be 100%, excluding unavoidable impurities.

Among the above-mentioned additive elements, Cu is an essential element in producing an amorphous foil and then crystallizing by annealing to produce a so-called nanocrystalline material consisting of fine crystal grains in the range of several nanometers to 100 nanometers. It is an element. Even if the material is not a nanocrystal material, Cu alone (Fe, Co, Ni)-(B, Si) is used to promote partial crystallization by partially promoting crystallization in order to improve high frequency magnetic properties. It is also within the scope of the present invention to add to the (C, P) alloy in the range of 0.1 at% to 2.5 at%.

Sn segregates in a thin layer on the surface of the foil and acts to suppress crystallization, so it is effective in producing an amorphous foil strip of a Fe-based alloy containing a high content of Fe. An alloy containing 82 atomic% or more of Fe is likely to undergo surface crystallization due to annealing, and magnetic properties such as iron loss and magnetic permeability are significantly degraded, but containing 0.1 mass% to 1 mass% of Sn No crystallization occurs after annealing, maintaining the original excellent soft magnetic properties. The addition of a small amount of S (sulfur) also acts in the same manner as Sn. The amount of S added is preferably in the range of 0.003 to 0.5% by mass.

The description of the function of the manufacturing apparatus 1 of the present embodiment will be continued. The driving means (which also serves as a drainage means) 13 rotates the cooling roll 11 while the cooling water supply means 12 circulates the cooling water W through the flowing water path 21 in the cooling roll 11. In this state, the molten metal A of the alloy poured from the melting furnace 14 into the crucible 15 is discharged from the nozzle 16 to the outer peripheral surface 11 a of the cooling roll 11.

At this time, the molten metal A forms a paddle between the outer peripheral surface 11 a of the cooling roll 11 and the nozzle 16. The portion in contact with the roll surface 11a of the paddle cooled by the cooling roll 11 by the rotating cooling roll 11 becomes a highly viscous supercooled liquid, which is drawn out in the rotational direction of the roll and quenched by the cooling roll 11 for supercooling Solidify in liquid form. Thereby, a strip-like amorphous alloy foil strip S is formed. The amorphous alloy foil strip S moves to a predetermined position along with the outer peripheral surface 11 a of the cooling roll 11, and then is induced in a direction away from the cooling roll 11 and wound up. On the other hand, the heat transferred from the molten metal A to the cooling roll 11 is transferred to the cooling water flowing inside the cooling roll and then discharged to the outside of the cooling roll 11 by the cooling water W flowing in the flowing water path 21.

The apparatus for producing an amorphous alloy foil strip of the present invention will be described more specifically. FIG. 2 (a) shows one of the embodiments of the present invention. The cooling roll 11 is formed with through

holes

21a, 21b and 21c penetrating through the side surfaces. It is provided at equal intervals on a plurality of concentric circles whose center C is the roll rotation axis shown in FIG. The side view of the cooling roll 11 of FIG. 2 (b) exemplifies a state in which the through holes are arranged at equal intervals on three concentric circles. The diameter of the through holes is the same size on the same concentric circle.

The side surfaces of the cooling roll 11 are covered with

covers

23a and 23b on both sides respectively. The cover does not release the cooling water to the outside, but serves to send or receive the cooling water to the through holes. Although FIG. 2 shows an example in which the cooling water is sent from the water supply side and the cooling water having passed through the through holes is flowed to the opposite side, as shown in FIG. It is also possible to drain water through a double pipe after passing through the center of the roll and passing through the through hole from the back side after hitting the cover 23b installed on the opposite side to the cooling water supply side after passing through the center of the roll. In the latter case, air is less likely to remain, and water is likely to flow evenly through the through holes.

As a modification of the first embodiment, a semicircular shape as shown in FIG. 3 (b) is provided at the end (the side far from the rotation axis) of the through hole inlet on the surface opposite to the water supply side in FIG. When the collar-like projections 26 are provided, the flow of water becomes smooth and it is easy to equalize the amount of water flowing through the through holes. A collar is not required on the outlet side of the through hole. However, if it is difficult to balance the roll rotation, a collar may be provided on the outlet side.

In FIGS. 2 and 3, it is convenient to provide a valve 27 on the cover 23 for air removal. Air may remain in the cooling channel. The residual air balances the cooling water passing through the through holes and reduces the cooling efficiency of the roll. Before casting is started, the cooling water is allowed to flow slowly and the roll is slowly rotated to open the valve provided on the cover (may be provided on one cover) to purge air and then close it. By repeatedly opening and closing the valve while rotating slowly, the air remaining in the flow path of the roll can be brought close to zero as much as possible.

Next, a second embodiment will be described.
FIG. 4 illustrates the arrangement of through holes penetrating through the side surface of the cooling roll shown in the first embodiment. In FIG. 2B, adjacent through holes on concentric circles are connected by a metal U-shaped pipe. An example is shown. Fig.4 (a) is a front view of the cooling roll which illustrates 2nd Embodiment, (b) is a side view of a cooling roll. Further, FIG. 4C is a view showing a flow path of the cooling water provided concentrically closest to the outer periphery of the roll when viewed from the front of the device. FIG. 4A shows the cooling water channel provided on the second concentric circle from the outer periphery of the roll.

In FIG. 4, 62a, 62b, and 62c are, in order from the side of the roll, the coolant flow path closest to the outer periphery, the second concentric flow path from the outer periphery, and the third concentric circle flow path from the outer periphery Is shown.

FIG. 4 illustrating the second embodiment shows that U-shaped pipes 64 connect adjacent through holes concentrically. Thereby, the through holes on the same concentric circle form one flow path branched from the main pipe flow path 21. FIG. 4 shows three examples of concentric circles, so there are three

flow paths

21a, 21b and 21c. Each end is coupled to a rotary diverter rotary joint 63 provided along the axis of rotation of the roll. As a result, even while the roll is rotating, a branched flow path is connected to the water supply and drainage main pipes (not shown) along the rotation axis.

In the second embodiment, the flow control valve 65 is provided in each of the

flow paths

62a, 62b and 62c branched from the main flow path. If there is a flow control valve in each flow path, optimal flow distribution can be performed according to the plate width and plate thickness of the foil strip to be cast. For example, when the plate width and the plate thickness are relatively small, the cooling water may be supplied with emphasis on the flow path closest to the roll outer peripheral surface. As the plate thickness and plate width increase, the water distribution is also increased in the second and third concentric channels. As a result, even if the plate thickness and plate width increase, the cooling capacity does not occur.

More specifically, when producing an amorphous alloy foil strip having a thickness of 30 μm, 90% or more of cooling water may be supplied with emphasis on the flow path closest to the roll outer periphery. By increasing the flow rate of the cooling water flowing through the second and third flow channels as the thickness of the foil increases, it becomes possible to produce amorphous foil strips having thicknesses of 50 μm, 75 μm and 100 μm. The heat which can not be removed in the first channel is absorbed by the second and third channels at almost 100%. The part that wraps the cooling channel of the roll is not a mechanical joint of multiple rings or sleeves by shrink fitting method, etc., and there is no heat resistant part, so the heat flow is the original of Cu alloy. High thermal conductivity can be utilized.

Next, a modification of the second embodiment will be described.
FIG. 5 is a side view illustrating the cooling roll in the present modification. In FIG. 5, for convenience, the through holes 67 (see FIG. 4A) and the U-shaped pipe 64 (see FIG. 4A) are not shown, and the through holes 21a to 21c, which are flowing water paths, are broken. It shows by.

As shown in FIG. 5, in the cooling roll 61 a in the present modification, the water flow path of each stage is divided into three. As a result, although the number of pipes (channels) collected at the rotary joint is increased (three times in the illustrated example) compared to the second embodiment described above, the temperature rise of the cooling water can be suppressed. It is possible to more effectively enhance the heat removal capacity of the cooling roll. This is because the pressure loss in the cooling channel is reduced.

In the apparatus for manufacturing an amorphous alloy foil band having side through holes according to the present invention, if an apparatus for cooling the cooling water is provided in the middle of the water supply passage, the heat removal effect is improved.

The diameter and width of the cooling roll used in the present invention will be described. These depend on the strength of support mechanisms such as the roll rotation shaft, bearings, etc. that support the weight of the roll. If the diameter is too large, the cooling capacity is improved but the load on the support mechanism is increased. In addition, if the diameter is too small, the number of branches of the flow channel will be insufficient and the cooling capacity will be insufficient. The diameter should be determined according to the desired board thickness. For example, for a plate thickness of 30 to 60 μm, a diameter of 40 to 60 cm is sufficient, and for a plate thickness of 60 to 90 μm, a diameter of 60 to 80 cm is appropriate. 80 to 100 cm is preferable at 90 to 110 μm.

As for the width of the cooling roll, the larger the width, the higher the cooling capacity. However, the effect of increasing the width is small compared to the conventional one-stage cooling roll. In the case of one-stage cooling, heat is transferred in a two-dimensional manner to a wide range of cooling water by increasing the thickness of the roll (the distance between the roll surface and the cooling water channel). However, in the multistage cooling water channel proposed in the present invention (water channels disposed on two or more concentric circles), most of the heat quantity flows in one dimension (the temperature gradient is large in the radial direction of the roll), so The effect of widening is limited. In other words, the width of the roll may be somewhat larger than the width of the foil band.

Next, the size of the through hole will be described. Basically, it is sufficient that the total surface area of the through holes is sufficient to absorb all the heat transferred from the molten metal to the cooling roll into the cooling water. Details will be described later. As for the size of the through hole, the easiness of drilling and the processing cost are important points. In addition, the pressure for circulating the cooling water should be in an appropriate range. Taking these into consideration, the diameter of the through hole is preferably 20 to 50 mm.

The nozzle used in the present invention (the opening for discharging the molten alloy to the cooling roll) is basically a multiple slit nozzle. An example of a double nozzle is shown in FIG. Conventionally, a single slit nozzle is generally used, but even if the width of the nozzle (dimension measured in the roll movement direction of the rectangular opening) is increased, the thickness of the foil remains at a constant value. It does not become more than. According to our experiments and calculations based on them, it was found that the thickness of the foil depends on the heat transfer coefficient of the molten metal and the cooling roll. The width of each double nozzle is preferably in the range of 0.2 to 0.8 mm. Further, if the upstream slit width is increased, the width of the bridge can be increased, which is advantageous from the viewpoint of the strength and the wear resistance of the bridge portion. The plate thickness is increased according to the multiplicity of the nozzles, so it is preferable to use triples at 60 to 80 μm and quadruple or five-fold nozzles for 80 to 110 μm. It has been confirmed that an alloy foil strip in an amorphous state can be produced up to at least five folds.

That is, the surface temperature of the cooling roll is low at the beginning of casting. The Cu or Cu alloy roll used due to the high thermal conductivity is not compatible with the Fe-based alloy. As the equilibrium phase diagram of the Cu-Fe alloy shows, the ratio of melting each other is small at low temperatures (including normal temperature). Since we dislike each other, it is difficult to transmit the heat transmitted by lattice vibration. The heat transfer rate is low. If the heat transfer coefficient is low, it does not solidify even if the molten metal is supplied. That is, the thickness does not increase. The excess supply of molten metal is only splashed around in the form of hot water balls. No stable paddles (pools held between the nozzle and the roll) are formed.

In order to raise the heat transfer coefficient, it is necessary to raise the roll temperature. Therefore, the discharge pressure is set to a lower value at the beginning of casting, and the amount of molten metal corresponding to the heat transfer coefficient is supplied. Then, the paddle is stabilized, and all heat released during solidification or solidification of a highly viscous supercooled liquid is absorbed by the roll, and the temperature of the roll rises. This increases the heat transfer coefficient and receives more heat. That is, the thickness of the foil can be increased.

We hear that we can not thick-foil by the multiple slit nozzle method until now. The reason is that although the temperature of the cooling roll is low, the molten metal having the heat absorbing ability of the roll is supplied. The overflowing molten metal splashes and a stable paddle is not formed. Since the heat is not absorbed by the roll, the temperature of the roll never rises and a thick foil is not formed. It seems quite commonplace but not generally recognized.

The method illustrated in FIG. 4 is effective to accelerate the temperature rise of the cooling roll at the beginning of casting as described above. For example, when casting is started, water is not supplied to the outermost channel. Close the flow control valve 65 of the corresponding flow path. Then, the outer peripheral temperature of the roll rises rapidly. The discharge pressure is increased accordingly. Since the heat transfer coefficient is high, the solidification speed is increased and the plate thickness is increased. When the desired plate thickness is reached, water is also supplied to the outermost peripheral flow path. At this point, the heat balance is balanced because the temperature of the outer peripheral surface of the roll is high. That is, the amount of heat absorbed by the roll and the heat removal capacity of the roll are equal.

If the plate thickness is greater than a certain value, the heat can not be taken away only by the flow path at the outermost periphery. The heat that can not be taken up is absorbed by the water flowing through the second water channel from the outer periphery. Furthermore, when the plate thickness is increased, the water of the third flow path takes over. Thus, the number of channels may be increased according to the desired thickness. The three stages of flow paths shown in FIGS. 4 and 5 are not limited to this, and may be adjusted according to the plate thickness.

In the practice of the present invention, the arrangement of the through holes, ie, the distance from the outer peripheral surface of the roll, must be determined. However, when the cooling water passage is set only at the outermost periphery as in the prior art, the thickness of the roll becomes important, but can not be specified in the present invention. As long as Cu or Cu alloy with high thermal conductivity (thermal conductivity of 70% or more of pure Cu) is used, the total surface area of through holes penetrating through the side of the roll absorbs the amount of heat input to the roll per unit time It is not necessary to specify the wall thickness if possible. The amount of heat transferred to the cooling water can be estimated using the sum of the surface area of the cooling water flow path and the forced convection heat transfer coefficient of the water (1.2 to 5.8) × 10 ³ W / kg. For the heat transfer rate described above, reference was made to “How to learn graphic heat transfer engineering” Ohmsha (published on January 10, 1985), edited by Nishikawa Kenji and Kitayama Kokoku.

If a very thick amorphous alloy foil strip is desired, the number of channels viewed from the side of the roll may be four or more. As the number of channels increases, the diameter of the roll must be increased. If the roll becomes too large, problems occur in the strength of the support mechanism such as the rotating shaft and the bearings that support the roll. In such a case, two rolls are used side by side as shown in FIG. The specific example of the device and the method of operation are already disclosed in Patent Document 1 and thus the description is omitted here. The modification is shown by patent document 2 and patent document 3. FIG.

When the cooling roll of the present invention is used in combination with any one of

Patent Documents

1, 2 and 3, productivity increases because the time to roll change becomes long. Work efficiency is also improved.

According to the present invention, it is possible to realize an apparatus for producing an amorphous alloy foil strip capable of producing a thick amorphous alloy foil strip on an industrial scale using a single roll.

1, 2, 3, 4, 5: manufacturing apparatus, 11: cooling roll, 11a: outer peripheral surface, 12: cooling water supply means, 13: driving means, 14: melting furnace, 15: weir, 16: nozzle, 17: Molten metal supply means, 18: moving means of molten metal supply device, 21a, 21b, 21c: through holes, 26: projections, 61a: cooling roll, 62: cooling water channel branched from the main pipe, 62a: cooling water channel at the outermost periphery of the roll, 62b: second cooling water passage from the roll periphery, 62c: third cooling water passage from the outer periphery, 63a: water supply side rotary joint, 63b: drainage side rotary joint, 64: U-shaped pipe, 65: flow control valve, 67:

penetration Hole

71a, 71b: Cooling roll, 72a, 72b: Cooling water supply means, 73: Driving means, 74a, 74b: Water supply pipe, 75a, 75b: Drain pipe, 77: Rail, 81: Slip Preparative, A: molten, C: rotary shaft, P: Paddle, S: amorphous alloy foil strip

Claims

A flow passage penetrating in the rotational axis direction on the side surface of the cooling roll is disposed at equal intervals on two or more concentric circles centering on the rotational axis of the roll. Cooling roll.
The manufacturing apparatus of the amorphous alloy foil strip provided with the cooling roll of Claim 1.