JPH0420692B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing thin metal wires.

In recent years, a so-called rotating liquid spinning method has been proposed as a method for producing thin metal wires having a circular cross section from molten metal, and the establishment of this technology is progressing rapidly. That is, JP-A-56-165016, JP-A-57-52550,
JP-A No. 57-79052, etc., and the feature of these prior art is that a liquid layer is formed by centrifugal force on the circumferential surface of a rotating cylindrical drum, and molten metal is ejected as a jet into the liquid layer. According to these methods, thin metal wires with a circular cross section and excellent properties can be easily obtained, and the cooling rate is faster than that of conventional methods. It is recommended that it can be made extremely large and is particularly suitable for manufacturing thin metal wires made of amorphous metals or metals containing fine crystal grains.

The inventors of the present invention have continued to conduct intensive research into the development of manufacturing equipment and manufacturing techniques for spinning in a rotating liquid as disclosed in the above-mentioned disclosures, but have now come across a major obstacle. The reason is that these rotating liquid spinning methods are batch-based. In other words, in these methods, a cooling liquid layer is formed on the circumferential surface of a rotating cylindrical drum by centrifugal force, and by keeping the surface and inside of this cooling liquid layer stable, the molten metal flow ejected as a jet is The molten metal flow stably enters the cooling liquid layer without disturbance, and after rapidly solidifying the molten metal flow, it is stably wound around the inner wall of the cylindrical drum by centrifugal force to form a desired thin metal wire. It is something to do.
An example of this will be explained in more detail with reference to FIG. 1. The procedure for manufacturing fine metal wires by the rotating liquid spinning method is as follows: First, a predetermined amount of a master alloy having a predetermined alloy composition prepared in advance is heated to The molten metal is charged into a melting furnace 2 equipped with a molten metal, heated and melted to form a molten metal 3, and then ejected from a nozzle 4 having a predetermined hole diameter provided at the tip of the furnace 2. Next, the cylindrical rotating drum 5 (hereinafter abbreviated as drum) is rotated at a predetermined number of rotations, and a predetermined amount of cooling liquid 6 is supplied from a supply device (not shown). Subsequently, the melting furnace system (heating device 1 and melting furnace 2) is set at a predetermined position in the space inside the drum 5 as shown. Thereafter, an inert gas is introduced at a predetermined pressure through a pipe 7 communicating with the melting furnace 2, and pressure is applied to the molten metal 3, so that it is ejected as a jet 8 from the nozzle 4. The jet 8 enters the rotating cooling liquid 6 and rapidly solidifies into a thin metal wire 9 (shown as a dotted cross section).
It is wound up on the inner wall of the drum 5. In this case, since the thin metal wire 9 usually needs to be wound up to a certain length, the melting furnace system (heating device 1 and melting furnace 2) is traversed 10 in the width direction of the inner circumference of the drum 5. After all the initially charged master alloy has been ejected, the melting furnace system is moved outward from the space of the drum 5, and then the rotation of the drum 5 is stopped.
Cooling liquid 6 that is no longer held by centrifugal force and falls
The bundle of thin metal wires produced on the circumferential surface of the drum 5 is taken out after being stored in a container (not shown). Conventional manufacturing equipment for the rotating liquid spinning method has been a batch-type manufacturing equipment in which such a procedure is performed in one cycle. Therefore, as can be easily surmised, such manufacturing equipment is limited in the amount of fine metal wire produced per batch due to constraints imposed by the size of the machinery and equipment, and the amount of fine metal wire produced per batch is limited. Due to the fact that it requires time for post-processing and other reasons, it has the drawback of extremely low productivity, and the reality is that it is difficult to commercialize it.

The inventors have overcome the obstacles to conventional manufacturing equipment,
Furthermore, the present invention provides a method and apparatus for continuously producing fine metal wires at low processing costs, which makes use of the basic characteristics of the spinning method in a rotating liquid, and which significantly increases productivity.

An embodiment of the apparatus of the present invention will be described in detail below with reference to FIGS. 2 and 3.

Figure 2 is a longitudinal sectional view of the main part of the device, showing the two outer diameters.
Cylindrical drum 11, 1 with the same diameter of 600mm/φ
One end of each drum 1' has an inner thick end 13, 13' over the entire circumference in order to form a liquid groove side wall 12, 12' to obtain a liquid depth of 20 mm later, and both drums 11, 11 The two thick end portions 13, 13' of the threads 14, 14' are arranged opposite each other at a predetermined thread passing interval of 30 mm, and are connected in series so as to be rotatable simultaneously by bearings 14, 14' bearing B, etc. Reference numeral 15 denotes an endless flat belt, which has a width of 50 mm and extends between the liquid groove side walls 12 and 12'.
In other words, the width is set to cover the threading interval of 30 mm, so the third
As shown in the figure (schematic side view of the device of the present invention), the drive pulley 16 and turn pulleys 17, 18, 1
9, the belt 15 is wound around most of the outer periphery (threading interval circumference) of both drums 11, 11', and the drums are rotated by the friction between the belt 15 and the drums 11, 11'. The belt is synchronized with the drum at a running speed of 600 m/min to prevent slippage between the two. This belt also serves as the groove bottom of the liquid groove 20.

Reference numeral 21 denotes a liquid injection part provided at the upper side where the rotating belt 15 first comes into close contact with the yarn threading interval to form the liquid groove 20, and cooling water of 5° C. is continuously supplied from this part 21. A stable cooling liquid layer is formed in the liquid groove 20 by the centrifugal force caused by the rotation of both drums 11, 11', and the cooling water is distributed to the liquid take-out portion 22 near the lower part where the belt 15 deviates from the yarn threading interval. The liquid is then taken out from the water tank 23, passed through a cooler 25 by a pump 24, adjusted to 5° C., and then supplied to the liquid injection section 21.

Note that the drive pulley 16 and turn pulleys 17 and 1 are moved to the belt 15 with a force greater than the sum of the centrifugal force of the belt itself and the centrifugal force received from the cooling liquid layer.
8 and 19, the belt is wound around the outer periphery of the drums 11 and 11' to maintain close contact between the belt and the drum. This prevents the cooling liquid from leaking from the gap between the belt and the drum, and stabilizes the cooling liquid layer.

After both drums 11 and 11' are rotated by a belt 15 and cooling water is supplied to a liquid groove 20, a thin metal wire is then spun, and 26 is a melting furnace equipped with a heater 27. A nozzle 28 with a hole diameter of 0.15 mmφ is attached to the tip of the melting furnace 26.
The raw material alloy having a composition of 75 atomic% Fe, 10 atomic% Si, and 15 atomic% B is fed to the melting furnace 2 through a supply pipe 29.
The molten metal 30 melted at 1300° C. is fed into the liquid groove 20 in an argon atmosphere, and the molten metal 30 is heated by argon gas from the nozzle 28 whose tip is disposed above the liquid groove 20.
The liquid is continuously jetted into the cooling water in the liquid groove 20 under a pressure of 4.5 kg/cm ² and is rapidly cooled and solidified to form a thin metal wire 31, which is then provided on the lower side of the liquid groove component. It was separated from the cooling water through the take-out port 32 and continuously taken out of the drum, and continuously wound up using a winding machine 33 provided separately.

The obtained 50,000 m continuous thin metal wire has a diameter of 0.15
mmφ, its cross section is almost a perfect circle, and its tensile breaking strength
It has a high strength of 355 Kg/mm ² and an elongation at break of 3.5%, and when the thin metal wire was examined for crystallinity by X-ray diffraction, only a broad diffraction peak characteristic of an amorphous state was observed.

Since the present invention has the above-described configuration, it is possible to continuously manufacture thin metal wires even though it does not require a huge amount of equipment, and therefore the production amount can be significantly increased.
This is an extremely excellent manufacturing method and apparatus in which productivity is improved and the temperature of the cooling liquid can be kept constant at all times, so that all parts of the obtained thin metal wire are homogeneous and highly strong.

Metals applicable to the present invention include pure metals, metals containing trace amounts of impurities, and all alloys, but especially alloys that have excellent properties when rapidly solidified, such as forming an amorphous phase. The most preferred alloys are alloys or alloys that form non-equilibrium crystalline phases. For example, "Science No. 8, 1978, pp. 62-72, Bulletin of the Japan Institute of Metals, Volume 15, No. 3, 1976, pp. 151-206,""Metals", 1971, 12
Monthly 1st issue, pages 73-78, etc., and Japanese Patent Publication No. 49-91014
No., JP-A-50-101215, JP-A-49-135820,
JP-A-51-3312, JP-A-51-4017, JP-A-51
-4018, JP-A-51-4019, JP-A-51-65012
No., JP-A-51-73923, JP-A-51-78705, JP-A-51-79613, JP-A-52-5620, JP-A-52
This is as described in numerous publications such as No.-114421 and Japanese Unexamined Patent Publication No. 54-99035. Among these alloys, Fe-Si-B system, Fe-P-C
system, Fe-P-B system, Co-Si-B system, Ni-Si-B
It goes without saying that a large number of types can be selected from metal-metalloid combinations and metal-metal combinations. Moreover, by taking advantage of its compositional characteristics, it is possible to assemble an alloy with excellent properties that cannot be obtained with conventional crystalline metals. In addition, as a specific example of an alloy that forms a non-equilibrium crystalline phase, for example, "Tetsu to Hagane" Vol. 66 (1980)
No. 3, pp. 382-389, “Journal of the Japan Institute of Metals,” Vol. 44, No. 3, 1980, pp. 245-254, “TRANSACTONS
OF THE JAPAN INSTITUTE OF
MEMALS” VOL20No.8AUgust1979 468-471
Page, Abstracts of General Lectures at the Autumn Conference of the Japan Institute of Metals (1979)
Fe-Cr-Al alloys and Fe-Al-C alloys described on pages 350 and 351 (October 1981), and summaries of general lectures at the Autumn Conference of the Japan Institute of Metals (November 1981), pages 423-425. Examples include Mn-Al-C alloys and Fe-Mn-Al-C alloys.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a conventional device, FIG. 2 is a vertical cross-sectional view of essential parts of a device according to an embodiment of the present invention, and FIG. 3 is a schematic side view of the entire device. 11, 11'... Cylindrical drum, 12, 12'... Liquid groove side wall, 13, 13'... Thick end portion, 14, 14'...
Bearing, 15... Endless flat belt, 16... Drive pulley, 17, 18, 19... Turn pulley, 20...
Liquid groove, 21... Liquid injection part, 22... Liquid extraction part, 26... Melting furnace, 27... Heater, 28... Nozzle, 29... Supply pipe, 30... Molten metal, 31...
Fine metal wire, 32... Fine metal wire outlet, 33... Winding machine.

Claims (1)

[Scope of Claims] 1. The entire circumference of one end of each of two cylindrical rotating drums having the same diameter consists of an inner thick end that will later become a side wall of the liquid groove, and both thick ends of both drums are A plurality of endless flat belts including drive pulleys are arranged opposite to each other at a predetermined threading interval, are connected in series so as to be rotatable simultaneously, and on the outer peripheral surface of the threading interval, have a width that covers the interval. The drum is rotated with a pulley in close contact with most of the periphery of the interval, and the belt is brought in close contact with the interval so that the cooling liquid is injected from the upper side only into the liquid groove constituent portion obtained by the belt serving as the groove bottom, A device is operated that uses centrifugal force to form a stable layer of cooling liquid, which is taken out from the bottom. A nozzle attached to the melting furnace is placed inside the drum, and a molten metal stream is added to a part of the rotating cooling liquid stream. 1. A method for continuously producing a thin metal wire, which comprises ejecting the wire, rapidly cooling and solidifying the thin metal wire, and then continuously taking out the thin metal wire from the lower side of the liquid groove constituting portion and winding it up. 2. One end of each of the two cylindrical rotary drums having the same diameter is provided around the entire circumference as a thick end suitable for obtaining a desired liquid depth, which will later be used as a side wall of the liquid groove. The thick end portions of both drums are attached at a predetermined threading interval and are connected in series so as to be able to rotate simultaneously, and an endless flat belt having a width that covers the threading interval is provided on the outer peripheral surface of the threading interval. , a plurality of pulleys including a drive pulley are used to bring the drums into close contact with most of the circumference of the belt, so that only the part that is in close contact with the belt is formed as the bottom of the liquid groove, and at the same time, both drums are simultaneously rotated by the drive pulley. The liquid injection part is located near the upper side where the rotating belt first comes into close contact with the thread threading interval, and the liquid injection part is located near the lower part where the belt moves away from the thread threading interval. A metal melting device equipped with a nozzle is inserted into the drum from the outside when both drums rotate and a liquid layer is formed in the liquid groove. 1. An apparatus for continuously producing fine metal wire, characterized in that the tip of the nozzle is arranged in a part of the liquid groove at the threading interval.