JPS59197352A - Method and device for producing light-gauge strip by quick cooling of liquid - Google Patents

Abstract

PURPOSE:To strip surely a light-gauge strip from the surface of a rotary cooling body in an exact position by providing a stripping plate for preventing entry of the light-gauge strip and changing the direction thereof having a blade surface facing flatly the rotary cooling body apart at a slight space from the surface thereof and a nozzle for spraying a gaseous jet into the space between the surface of the cooling body and the stripping plate from the direction opposite from the advancing direction of the light-gauge strip. CONSTITUTION:A molten material is ejected from a nozzle 4 so as to contact with the surface of a rotary cooling body 3 rotating at a high speed and is quickly cooled to solidify, thereby manufacturing continuously a light-gauge strip 5. A stripping plate 1 for preventing the entry of the strip 5 and changing the direction thereof having a blade surface facing flatly the body 3 apart at a slight space from the surface thereof and a nozzle 4 for blowing a gaseous jet toward the space between the surface of the body 3 and the plate 1 from the direction opposite to the advancing direction of the light-gauge strip are provided. The nozzle 4 is provided near the space separately from or integrally with the plate 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a liquid-quenched ribbon and an apparatus for producing the same, and particularly the present invention relates to a method for producing a solution-quenched ribbon of any one of metals, metalloids, and semiconductors. This article relates to the first-generation equipment.

In the present invention, a metal having a structure consisting of at least seven types of amorphous or fine crystalline materials produced by solution quenching ribbon melting and the method of the present invention.

It means a thin strip of metalloids, semiconductors, or ceramics.

As a method for producing amorphous or fine crystalline ribbon,
A method is known in which a molten material is jetted from a nozzle onto the rotating surface of a rotary cooling body to rapidly solidify it. In this case, Fi/metal rotary rolls and two metal rotary rolls rotating in contact with each other are used as rotary cooling bodies. 1
The method using multiple rotating metal rolls can be further divided into one method.

The first method is usually called the single roll method, which uses the outer peripheral surface of a rotating roll as a cooling surface and continues to eject the molten material with the nozzle fixed, resulting in continuous rapid cooling and solidification. , Usually called the centrifugal quenching method, the inner circumferential surface of a rotating cylindrical drum is used as a cooling surface, and the molten metal is jetted onto the inner circumferential surface of the cylinder and is rapidly solidified while being in close contact with it due to centrifugal force. This method involves winding it up within a drum or peeling it off and releasing it outside the drum to form a thin ribbon.

According to these methods described above, for example, F'e, Co+N
B+ Si+ C, t P, Get Zr,
An alloy in which 7 to 3 at.
By melting the molten metal to a high wettability range of 100 C and spouting it onto the rotating roll and rapidly cooling it at a cooling rate of 7007 seconds or more, a wide range of periodicity similar to that in a liquid state without a crystalline structure can be obtained. It is known that it is possible to produce ribbons of so-called amorphous alloys having a structure free of .

When producing a liquid quenched ribbon using these methods, the molten material is rapidly solidified on the surface of a rotary cooling body and formed into a ribbon. At that time, the quenched ribbon remains stuck to the surface of the rotating cooling body, and after running, the surface At an appropriate time determined by the adhesion force on the surface, the material peels off at an appropriate position on the circumferential surface of the cooling body, flies through the air, and then falls to the floor to be deposited or proceed to the subsequent winding process. . The magnitude of the adhesion force between the quenched ribbon and the rotary cooling body, whether amorphous or microcrystalline, is generally determined by the preheating temperature of the cooling body surface, the temperature change during ejection of molten material, the roughness of the surface of the material, Or ejection temperature and ejection pressure of molten material.

It changes and tends to fluctuate depending on various complicated factors such as the material and the differential pressure caused by the pressure gradient in the immediate vicinity on the surface of the rotary cooling body caused by the viscosity of the surrounding atmospheric gas covering the surface of the rotary cooling body. Therefore, while the rotary cooling body rotates, the ribbon does not peel off from its surface, but instead collides and deposits on the nozzle opening, damaging both the nozzle and the roll, causing trouble.

In order to eliminate the above-mentioned problem, the first method is to install one or more gas nozzles at the position where the ribbon is to be peeled from the cooling body such as a roll, and from there, the gas is blown onto the surface of the cooling body and the ribbon. argon at the interface.

Rather than spraying high-pressure gas such as nitrogen or air, a method has been proposed in which the film is peeled off at a certain position (JP-A-Sho!).
r4'-! OQ3'l, JP-A-35-97g! (Japanese Unexamined Patent Publication No. 37-//ko-93/). In addition, as a first method, a method is known in which a peeling plate with a sharp tip is provided at a position where the ribbon is to be peeled off by contacting the surface of the rotating cooling body, and the ribbon is forcibly peeled off. .

However, in the case of using the first method, even if the gas blowing pressure, direction and position are appropriately set, the adhesion force of the ribbon to the surface of the rotary cooling body exceeds the peeling force obtained by the method. In such cases, the ribbon may bend and accumulate near the gas blowing nozzle opening, near the molten material jetting nozzle, or in the narrow gap between the cooling body surface and these nozzle openings. This will cause significant damage to the In addition, in the case of the second method, a release plate made of carbide, high-speed steel, beryllium copper, etc., which is relatively hard and does not cause seizures, is placed on the surface of the rotating cooling body that moves at high speed. It is installed with light contact or with a slight load applied, but depending on the operating conditions of the device, the adhesion force of the ribbon may exceed the peeling force of the method, in which case the ribbon may buckle. The thin strip is pressed between the release plate and the cooling body surface, and a satisfactory continuous ribbon cannot be obtained.
On the contrary, the surface of the cooling body will be seriously damaged.

The present invention solves the above-mentioned problems of the prior art and provides a method and apparatus for reliably forcibly peeling a ribbon formed at high speed by rapid solidification from a liquid state from a rotating cooling body. As described in the above claims, the thin strip has a blade surface that faces the surface of the rotary cooling body with a slight gap therebetween, and is intended to prevent the intrusion of a thin strip and to prevent peeling for direction change. A nozzle that sprays a gas jet from a direction opposite to the direction in which the ribbon advances toward the gap formed by the surface of the cooling body and the peeling plate is installed in the vicinity of the gap, either separately or integrally with the peeling plate. The thin strip is forcibly and reliably peeled off from the surface of the rotary cooling body at a precise position.

Next, the present invention will be explained in detail with reference to the principle diagram shown in FIG. Figure 1 (5) shows the spouting of molten material 1
7. Ream M shows the state in which the ribbon is being manufactured, and Fig. 7 β) shows an enlarged view of the parting plate 1 for preventing intrusion and changing the direction, and the gas jet blowing area near the nozzle installation part. As a cooling body, diameter/30~. The ejection point of the molten material ejected from the nozzle in a manner that circumscribes the outer circumferential surface of the cooling roll J in the lateral direction of approximately 2θ0OsS, for example, at a position as far away as possible from the position of O0, from directly above to the right; The strip 3 can be produced by forcibly and continuously peeling off the strip 3 by installing a peeling plate 1 and a gas spray nozzle in the direction of the angle between 0° and the tangent.

At the tip of the rapidly cooled continuous ribbon 5 formed on the outer peripheral surface of the cooling roll, the temperature rise of the cooling body is generally still small, so the adhesion force of the ribbon is small and it is naturally peeled off by centrifugal force.
When it reaches the release plate, it is ejected into the air, but as the subsequent molten material continues to spout, the surface temperature of the cooling roll 3 rises and the adhesion force increases, so that it adheres to the release plate. You will be able to reach it as it is. As shown in FIG. 7 (I3), the ribbon that has reached the peeling plate 1 has both sides facing the outer peripheral surface of the cooling roll 3 and the width of the blade surface 6 of the peeling plate facing it (
Width (approximately the width of the outer circumferential surface of the cooling roll) and length Quantity ~
Gaps θ, θ! surrounded by several lQ Intn). ~
Even if it bends and tries to enter the narrow gap 7 below θ, jllll+1, there is a cooling roll on the opposite side of the peeling plate.

The jet stream ejected from the gas blowing nozzle, which is placed about /-~gwa away from the peeling plate, aims at this narrow gap 7 and passes through the gap 7, so it is blown away and cannot enter, and the direction is changed to the peeling plate. It continuously peels off and flies in a non-contact state along the lower edge of the object without receiving any damage.

Even if the adhesion force of the ribbon to the cooling roll surface 9 is so great that a local part of the ribbon buckles and enters the narrow gap, the narrow gap 7 causes the ribbon to run immediately. The speed of the jet stream flowing in from the front of the gap is reduced.
Since it is easily blown away by O, it never enters continuously, and a continuous ribbon S can be produced safely.

Further, Fig. 10 shows a nozzle co' with a peeling plate l' which is provided by combining a peeling plate for preventing intrusion and changing the direction of the present invention and a nozzle for blowing gas, but in this case also. In principle, it is possible to prevent the continuous ribbon from entering in exactly the same way and to reliably peel it off. The release plate of the present invention has high hardness such as carbide, high-speed rigidity, high-density and high-strength nitride/silicon purple, silicon carbide 9-part stabilized zirconia, tetragonal boron nitride, alumina, etc.
A tough material with excellent wear resistance is used for the blade. or,
Any material can be used for the nozzle as long as it has appropriate rigidity, and the cross-sectional shape of the nozzle tip can be circular or oval as shown in Figure 2, or it can be a slit as in the case where it is integrated with a peeling plate. It may be in any form, and may be made of a suitable gas such as dry air, Ar gas, N
Any device may be used as long as it can flow out two gases etc. as a jet stream at an appropriate flow rate and pressure. Furthermore, in order to prevent the peeling plate of the present invention from coming into contact with the roll surface and damaging it due to the thermal expansion of the cooling roll due to the temperature rise near the surface of the cooling roll during spouting of the molten material, the peeling plate of the present invention is released slightly but gradually during ribbon production. It is also possible to move it in the direction.

FIG. 3 shows a cooling roll 3Z as a rotary cooling body,
311 is used, and the molten material jetted from the molten material jetting nozzle to the meeting area of two rolls is 2.
The surface of each roll is quenched from both sides to form a quenched ribbon S. At this time, as in the case of the principle diagram in FIG. By arranging it near the outer periphery of the roll, it can be manufactured with reliable peeling.

Figure 11 (G), @) shows the cooling drum l as a rotary cooling body.
The principle of using / is shown, and the molten material jetted from the molten material spouting nozzle onto the inner peripheral surface of the cooling drum // is rapidly cooled on the inner peripheral surface and becomes a quenched ribbon. 1
As in the case of the principle diagram in Figure 1, by arranging the peeling plate l of the present invention and the gas jet blowing nozzle near the inner circumferential surface of the drum, the peeling can be ensured as shown in Figure 1I (a), and the inside of the drum can be removed. It can be produced by winding it up or simply by ejecting it from the drum as shown in FIG. 9).

The present invention will be specifically described below based on examples.

Example 1 Principle In an apparatus as shown in FIG. 1 (a), a metal roll with a diameter of 11,000 tons and a width of 100 mm is rotated as a cooling roll at a speed of Soorpm, and rotated clockwise from a position directly above the cooling roll. A molten metal spouting nozzle was placed near the outer circumferential surface at the position of K00, and while filling the melting crucible with Ar gas, / after melting the alloy of the following components: COss MOsZr 1o of K9, the pressure of Ar gas was increased to 7 Ky/crn2 Then, the mixture was ejected through the narrow slit-like gap of the nozzle onto the outer peripheral surface of the cooling roll and rapidly cooled to produce an amorphous ribbon. At that time, use a peeling plate with length jfQmtl+ and width 10θmm.
.

Thickness/jsfi high density and high strength (bending strength is 30 Ky)
/am2) is cut and polished to give the tip a flat blade shape of 17, and the gap with the cooling roll is Qo, 2111.
11, two cooling roll circumferential surfaces are fixedly arranged near the left 0 with a metal holder, while the outer diameter is 16φ and the inner diameter is /lIφ.
A nozzle made by crushing the tip of a copper pipe into an elliptical cross section is placed at a distance of approximately the same distance to the left from the direction of the line that bisects the angle between the tangent to the cooling roll and the top surface of the peeling plate. , Ar gas 3. By ejecting and spraying at a pressure of -2 θK, the width is 30 mm and the length is approximately t, o m.
, a continuous amorphous ribbon with a thickness of 3 kpm could be peeled off from the cooling roll surface and produced with almost no damage.

The above experiment was repeated several times, and the excellent effect was demonstrated without getting caught in the peeling plate, and the continuous ribbon could be reliably recovered.

On the other hand, as a result of conducting an experiment under the same conditions, removing either or both of the peeling plate and the gas jet blowing nozzle, a thin strip appeared on the surface of the cooling roll 0.3 to i, o seconds after the start of molten metal spouting. It began to adhere to the surface, buckled and accumulated near the peeling plate or the molten metal spouting nozzle, and a continuous ribbon could not be obtained.

Example a Principle In an apparatus as shown in FIG. 3, a single metal roll with a diameter of 4Qm and a width of 1QWI is pressed against each other with a force of several tens to hundreds of times as a cooling roll.
811 of 1009 while filling the melting crucible with Ar gas. x, after melting the silicon-iron alloy containing % by weight, Ar gas pressure t, :IKy/
crn2 was used to jet the mixture through the narrow slit-like gap of the nozzle to the joint of the cooling rolls and rapidly cool it to produce a fine crystalline ribbon with a width of /Qm. At that time, as a peeling plate, the length is 4IO-
A plate of partially stabilized zirconia (bending strength of about 1 o6 Kg/am2) with a width of 10 mm and a thickness of 10 mm is cut and polished to make the tip a flat blade, and the gap with the cooling roll is Q, 7.
Fix each chill roll in the vicinity of go0 in the rotational direction from the joint of the circumferential surface with a metal holder so that the volume is 1 ml+,
On the other hand, for spraying, the tip of a copper pipe with an outer diameter of Aφ and an inner diameter of 4'φ is formed into a slit-like cross section with a gap of approximately the same size as a slit. From the dividing angle to each? Arranged at a distance of about
A continuous microcrystalline ribbon having a thickness of 70 μm was peeled off from the cooling roll surface and produced with almost no damage.

The above experiment was repeated several times under different conditions within the range mentioned above, but the release plate was never caught, but either the release plate or the gas jet spray nozzle, or both, were removed. As a result of conducting an experiment under the same conditions, the higher the rotation speed and the lower the roll pressing load, the more the quenched ribbon and molten metal droplets stuck to the roll surface, causing the nozzle tip, peeling plate, etc. It was difficult to obtain a continuous ribbon due to buckling or accumulation near the gas blowing nozzle.

Example 3 In an apparatus as shown in Figure 5 (5) of the same principle, a metal drum having an inner diameter of about 7QQQ m and a cylindrical surface with a width of 70 cm on the inner circumference was rotated at goorpm and cooled. A molten metal spouting nozzle was placed on the inner peripheral surface at 13 left 0 position counterclockwise from the position directly above the drum, and 7 Ky Co75Fe5S was poured while filling the melting crucible with Ar gas.
After melting an alloy containing atomic percent of 15B15, Ar gas pressure is 0, K K9/Crl? Then, it was ejected onto the inner peripheral surface of the cooling drum through the narrow slit-like gap of the nozzle, and was rapidly cooled to produce an amorphous ribbon. At that time, as a peeling plate, a high-density, high-strength (analytical bending strength: rOK9/w'' degree) silicon carbide plate with length j; The tip has a flat blade shape, and a metal holder is installed near just above the inner circumferential surface of the cooling drum so that the gap with the inner circumferential surface of the cooling drum is Q, Q/ltl+, and the angle made with the tangent line is approximately 20°. Fixed arrangement, one side outer diameter / Aφ, inner diameter /
A nozzle made by crushing the tip of a φ copper pipe into an elliptical cross section is placed at a distance of J culm degrees from the direction that bisects the angle between the tangent to the cooling drum and the top surface of the peeling plate. By spraying Ar gas at a pressure of 0Ky/cm, a continuous amorphous ribbon with a width of SO, a length of about 100m, and a thickness of 3kpm was peeled off from the inner circumferential surface of the cooling drum. It was possible to produce the product without damage almost every time by reaching the temperature of 1~ with a vacuum adsorption type winding drum and winding it up.

On the other hand, as a result of conducting an experiment under the same conditions, removing either the peeling plate or the gas jet nozzle, it was found that the peeling plate or the gas jet nozzle were immediately seated near the molten metal spout nozzle opening after the molten metal spout started. If the peeling plate is strongly pressed with a force of about 2 Ky in an attempt to forcibly peel off the thin strip, the inner circumferential surface of the cooling drum may be damaged. The strong contact between the stripping plate and the peeling plate blade caused damage to the inner circumferential surface, significantly impeding the surface roughness of the back side of the ribbon, and having an adverse effect.

As described above, according to the present invention, a liquid quenched thin body with a smooth surface can be stably produced.

[Brief explanation of the drawing]

FIG. 1(A) is a longitudinal sectional view of the device of the present invention, FIG. 1(B)
1 is an enlarged longitudinal cross-sectional view of the vicinity where a peeling plate of one embodiment of the apparatus of the present invention is installed, and FIG. Figures 3 and 3 are diagrams showing the shape of the tip opening of the gas blowing nozzle, respectively, and Figure 3 is a longitudinal cross-sectional view of the apparatus of the present invention for producing a quenched ribbon using a gas blowing nozzle. /... Peeling plate, K... Gas jet blowing nozzle, 3.0
Cooling roll, q... nozzle, SjT umbrella ribbon, 6...
Blade surface of the release plate, ri...gap, g...lower surface of the release plate, 9...cooling roll surface. Patent applicant Sumitomo Special Metals Co., Ltd. Agent Patent attorney Mura 1) Politics

Claims (1)

[Claims] 1. By bringing a molten material into contact with a nozzle and jetting it onto the surface of a rotating cooling body moving at high speed, the material is rapidly cooled and solidified.
In the method of continuously manufacturing thin strips, a peeling plate is used to prevent the intrusion of the thin strip and to change the direction of the thin strip, which has a blade surface that faces the surface of the rotary cooling body with a slight gap between them, and the surface of the cooling body under examination. Through the opening of the gap formed by the peeling plate,
A nozzle that blows a gas jet in the direction opposite to the direction in which the ribbon travels is provided in the vicinity of the gap, either separately or integrally with the peeling plate, to forcefully and reliably remove the ribbon from the surface of the rotating cooling body at a precise position. A method for producing a liquid p-cold ribbon characterized by peeling it off. 2. The method for producing a liquid-quenched ribbon according to claim 7, wherein the liquid-quenched ribbon is an amorphous alloy. 3. The method for producing a liquid quenched ribbon according to claim 1, wherein the liquid quenched ribbon is a microcrystalline quenched alloy. 4. A container equipped with a nozzle for storing and ejecting molten material;
It has a rotating bath cooling body, a peeling plate for changing the direction of preventing the intrusion of the ribbon, and a gas jet nozzle, and rapidly cools and solidifies the molten material spouted onto the surface of the rotary cooling body from the molten material jet nozzle of the container. 1. An apparatus for producing a liquid quenched ribbon, characterized in that after forming a continuous ribbon, the ribbon is continuously and forcibly peeled off from the surface of a rotating cooling body.