JPH031098B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to the termination of molten metal spouting,
This invention relates to a manufacturing method that is particularly effective during shutdown.

In recent years, methods for manufacturing thin metal wires with circular cross sections from amorphous alloys, microcrystalline alloys, and non-ductile alloys that are useful as various industrial materials have been proposed; -165016, etc., employ the rotating liquid spinning method. In this method, a cooling liquid layer is formed in a rotating cylindrical drum by centrifugal force, and molten metal is jetted into this cooling liquid layer, cooled and solidified to form a thin wire, which is then pushed and pulled against the inner circumferential wall of the drum by centrifugal force. In this method, the thin wire wound around the inner peripheral surface of the drum is bundled during operation, but when the spouting of molten metal is finished and the rotating drum is stopped, this thin wire bundle is cooled. When the thin wire bundle falls down inside the drum along with the liquid, it loses its shape, and has the disadvantage of falling apart or getting tangled. It is difficult to pull out the ends of the wire, and the wire may become tangled and break during unwinding, which is not desirable in practice.

As a result of various studies in order to eliminate the drawbacks of the conventional method as described above, the inventors of the present invention have found that, when the rotating cylindrical drum is stopped, the bundle of thin wire wound up on the inner peripheral surface of the drum is prevented from falling. Focusing on the fact that all you have to do is to maintain the bundle without losing its shape and take it out as a bundle from inside the drum or pull it out from the terminal.
This has led to the present invention.

That is, when the rotating cylindrical drum is stopped, the direction of the rotating shaft, on which the rotating cylindrical drum is fixed, is changed from horizontal to vertical, thereby preventing the cooling liquid and the bundle of thin metal wires from falling inside the rotating cylindrical drum. The present invention provides a manufacturing method that prevents this.

Metals applicable to the present invention include pure metals, metals containing trace amounts of impurities, and all alloys, but in particular, alloys with excellent properties, such as forming an amorphous phase, can be formed by rapid solidification. The most preferred alloys are alloys that form a non-equilibrium crystalline phase or alloys that form a non-equilibrium crystalline phase. Specific examples of alloys that form the amorphous phase include "Science" No. 8, 1978, pp. 62-72, Bulletin of the Japan Institute of Metals, Vol. 15, No. 3, 1976, pp. 151-206, and "Metals ”
Documents such as the December 1, 1971 issue, pages 73-78, and JP-A-49
−91014, Japanese Patent Application Publication No. 1973-101215, Japanese Patent Application Publication No. 1973-
No. 135820, JP-A-54-3312, JP-A-51-4019
No., JP-A-51-65012, JP-A-51-73920, JP-A-51-73923, JP-A-51-78705, JP-A-51
-79613, JP-A-52-5620, JP-A-52-
This is as described in many publications such as No. 114421 and JP-A-54-99035. Among these alloys, representative examples that have excellent amorphous formation ability and are practical alloys include Fe-Si-B system, Fe-P-C system,
Examples include Fe-P-B system, Cc-Si-B system, Ni-Si-B system, etc., but it goes without saying that there are many types to choose from, such as metal-metalloid combinations and metal-metal combinations. Nor. Furthermore, by taking advantage of the characteristics of its composition, it is possible to assemble an alloy that has excellent properties that cannot be obtained with conventional crystalline metals.
Specific examples of alloys that form non-equilibrium crystalline phases include "Tetsu to Hagane" Vol. 66 (1980) No. 3,
Pages 382-389, "Journal of the Japan Institute of Metals" Vol. 44, No. 3,
1980, pp. 245-254, “TRANSACTIONS OF
THE JAPAN INSTITUTE OF METALS”
VOL20No.8, August1979 pages 468-471, Japan Institute of Metals Autumn Conference General Lecture Summaries (October 1979)
Fe-Cr-Al alloy described on pages 350 and 351, Fe-
Al-C alloys and Mn described in the Japanese Society of Metals Autumn Conference General Lecture Abstracts (November 1981) pp. 423-425.
-Al-C alloy, Fe-Cr-Al alloy, Fe-Mn
Examples include -Al-C alloys.

The method of the present invention will be explained in more detail below with reference to the drawings.

FIG. 1 shows an example of a conventional thin metal wire manufacturing apparatus using a rotating cylindrical drum. In this case, molten metal 2 is heated in a crucible 1 by a heater 3 (for example, siliconite or high-frequency heating is used). . Further, the rotating cylindrical drum 5 is rotationally driven by a motor 6, and a cooling liquid 7 inside the drum 5 is driven.
is pressed against the inner peripheral surface of the drum 5 by centrifugal force. The molten metal 2 is ejected from the nozzle 4 at the tip of the crucible 1 by pressurizing argon gas, enters the cooling liquid 7, cools and solidifies, and becomes a fine wire 8 on the drum 5.
At this time, by traversing the nozzle 4 in the axial direction of the drum 5, the thin wires 8 are accumulated in a bundle on the inner peripheral surface of the drum 5.

According to this conventional method, after the ejection of the molten metal 2 from the nozzle 4 is completed, when the crucible 1 and the heater 3 are pulled out from inside the drum 5 and the rotating drum 5 is stopped, the cooling liquid 7 and the 8 bundles of thin wires are removed. The eight bundles of thin wires fall downward into the drum 5, causing the eight bundles of thin wires to lose their shape. In such an apparatus, even if a support rod is attached to prevent the thin wire bundle from falling downward into the drum during the fall, it is difficult to completely prevent the bundle from deforming. In addition, especially if the rotating cylindrical drum is made loose and then stopped, the centrifugal force will gradually decrease, causing large waves in the cooling liquid layer and causing the thin wire bundle to collapse. Furthermore, if the motor is suddenly stopped using the brake, the cooling liquid will fall all at once, causing the motor to lose its shape.

An embodiment of the manufacturing method of the present invention will be explained with reference to FIGS. 2 and 3. FIG. 2 shows a state in which the rotating shaft 11 of the drum is in a horizontal state during manufacturing;
A rotating cylindrical drum 5 fixed to the shaft end of the crucible 1 is driven by a motor 6 via a timing belt 14, and the molten metal 2 is jetted from a nozzle 4 at the tip of the crucible 1 by pressurizing argon gas. It is ejected and held as a thin wire 8 on the inner peripheral surface of the drum. At this time, the nozzle 4 is oriented vertically, and the state in which the molten metal is ejected is very stable.

Next, when the ejection of the molten metal 2 from the nozzle 4 is completed, the crucible 1, nozzle 4 and heater 3 are pulled out of the drum 5 as shown in FIG. 12
Rotate it 90 degrees around , so that the rotation axis 11, which was in the horizontal direction, becomes vertical. That is, the rotating cylindrical drum 5 is placed in a supine state. At this time, the pedestal 10 is temporarily pulled down from the state shown in FIG. 2, and after the device has rotated through 90 degrees, it is returned to the predetermined position to keep the device in a stable state. Next, the rotating cylindrical drum 5
When the rotation of the drum 5 is slowly stopped, the cooling liquid 7 in the drum 5 loses centrifugal force and collects on the bottom surface of the drum 5, passes through the rotating shaft 11 and the hollow hole 13, and exits at the discharge port 15.
is discharged. Only eight bundles of fine wire remain in the drum 5. In this way, the eight bundles of thin wire can be taken out without losing their shape.

Note that, unlike the method of the present invention, it is also possible to set the rotating shaft of the rotating cylindrical drum approximately vertically from the beginning of the spouting of molten metal, and to stop it as it is when the spouting ends, but normally the nozzle is oriented vertically. Although it would be desirable to It's something that doesn't exist.

Since the method of the present invention has the above-mentioned configuration, it is a relatively simple method that can prevent the cooling liquid and the metal wire bundle from falling when the operation is stopped. It is extremely superior in terms of workability and economy, as it eliminates wire breakage.

Next, the present invention will be specifically explained using examples.

Example 1 An alloy having a composition of Fe75 Si10 B15 (subscripts are atomic %) was melted and ejected, and a rotating cylindrical drum with a diameter of 500 mm and a width of 80 mm was used to perform the method of the present invention at a rotation speed of 340 r.pm and a traverse speed of 10 cm/min. diameter using
When we manufactured fine metal wires of 150μm and 2000m in length, we were able to take them in bundles without losing their shape in the drum.

Example 2 An alloy having a composition of Co ₇₂ , ₅ Si ₁₂ , ₅ B ₁₅ (subscripts are atomic %) was melted and ejected, and a rotating cylindrical drum with a diameter of 500 mm and a width of 80 mm was used at a rotation speed of 300 r.pm and a traverse speed of 8 cm. diameter using the method of the invention in /min
When we produced thin metal wires of 130μm and 1000m in length, we were able to take them in bundles without losing their shape in the drum.

[Brief explanation of the drawing]

FIG. 1 shows a conventional thin metal wire manufacturing device using a rotating cylindrical drum, FIGS. 2 and 3 show an example of an embodiment of the thin metal wire manufacturing device that can be used in the method of the present invention, and FIG. 2 shows an aspect of the thin wire manufacturing device. 3 shows the state when the rotating cylindrical drum is stopped. 1... Crucible, 2... Molten metal, 3... Heater, 4...
Nozzle, 5... Rotating cylindrical drum, 6... Motor, 7...
Cooling liquid, 8... Thin metal wire, 9... Frame.

Claims (1)

[Claims] 1. Molten metal is ejected from a nozzle into the liquid of a rotating cylindrical drum that has a cooling liquid on its circumferential surface by centrifugal force, and the molten metal is cooled and solidified to form thin metal wires on the circumferential surface of the rotating cylindrical drum. In the manufacturing method of thin metal wire, the nozzle remains vertical even after the molten metal has finished spouting, but the rotating shaft with a rotating cylindrical drum fixed to one end remains horizontal while the molten metal is spouting, and the nozzle remains vertical even after the molten metal has finished spouting. A method for producing thin metal wire, which comprises rotating the thin metal wire vertically and then stopping the operation.