JPS6224842A - Apparatus for producing fine metallic wire - Google Patents

Abstract

PURPOSE:To stabilize a continuously injected metal by the specified liquid temp. and high speed cooling power and to form the finer metallic wire having good quality by providing plural partition plates and liquid side plate to the peripheral inside wall of a rotary drum so that the centrifugal surface height of the continuously poured cooling liquid is made constant and that the stationary flow in maintained on the liquid surface. CONSTITUTION:The partition plates 10, 10' and in-liquid plates 11, 11' are provided to a bottom plate 5' of the cylindrical drum 5 and the liquid side plate 12 is provided on the further outer side. A drum 5 is rotated by a motor M and the cooling liquid 6 is continuously poured into the drum from a cooling liquid supply pipe 13. The surface height of the cooling liquid 6 to which centrifugal force acts is made always constant by the side plate 12 and the stationary flow in an arrow direction is maintained by the plates 10, 10' and the plates 11, 11'. A molten metal 3 in a melting furnace 2 is continuously injected 8 into the liquid 6 from a nozzle 4 by a back pressure 7 of an inert gas, then the injected metal 8 is made into the fine wire of the circular section having the specified diameter by the specified liquid temp. and high speed cooling power of the cooling liquid 6 and the quality thereof is stabilized.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an apparatus for manufacturing fine metal wire.

More specifically, the present invention relates to an apparatus for producing fine metal wire by spouting molten metal into a cooling liquid layer formed on the inner peripheral surface of a 9-rotation cylindrical drum.

(Prior Art) In recent years, a so-called rotary liquid spinning method has been proposed as a method for manufacturing thin metal wires having a circular cross section by rapidly cooling and solidifying molten metal, and the establishment of this technology is progressing rapidly. That is, JP-A-56-165016, JP-A-57-52550
JP-A-57-79052, etc. The characteristics of these technologies are that a cooling liquid layer is formed by centrifugal force on the inner peripheral surface of a cylindrical drum that rotates twice, and molten metal is ejected as a jet into the cooling liquid layer, which is rapidly cooled and solidified to form a thin metal wire. According to these devices and methods, thin metal wires with a circular cross section and excellent properties can be easily obtained, and compared to conventional devices and methods,
It is said that the cooling rate can be increased significantly, and it is particularly suitable for manufacturing fine metal wires made of amorphous metals or metals containing fine crystal grains.

Fig. 2 shows a typical apparatus for manufacturing thin metal wires using the conventional spinning method in a rotating liquid, and briefly explains the spinning method. A melting furnace 10 equipped with a heating device 101
The molten metal 103 is prepared by heating and melting into a molten metal 103, and waits for ejection from a spinning nozzle 104 at the tip of the furnace 102. Next, the cylindrical drum 105 is rotated at a predetermined number of rotations.

A cooling liquid 106 is supplied from a cooling liquid supply pipe 113. Next, the melting furnace yarn (heating device 101 and furnace 102) is set at a predetermined position inside the cylindrical drum 105 as shown in the figure. After that, the gas introduction pipe 1 is connected to the melting furnace 102.
Inert gas at a predetermined pressure is introduced from 07, and the molten metal 10
Apply pressure to 3.

A molten metal jet stream 108 is ejected from the spinning nozzle 104 . The jet stream 10B is a cooling liquid 10 that rotates twice.
6, the metal wires are rapidly cooled and solidified to become thin metal wires 109 (cross section shown), which are traversed T on the inner circumferential surface of one cylindrical drum 105, and are aligned and stacked.

After all the initially charged master alloy has been ejected.

The melting furnace system (101, 102) is moved outside the cylindrical drum 105, and then the rotation of the cylindrical drum 105 is stopped, and the cooling liquid 106 falling is received from the discharge port 114 into the liquid receiving box 115. A bundle of thin metal wires 109 is taken out. The above is the spinning method using the conventional apparatus.

(Problems to be Solved by the Invention) Generally, in the production of amorphous metals, the cooling rate when molten metal is rapidly solidified is usually 10' to 105'C/sec.
One of the factors that increases the cooling rate is the temperature of the cooling liquid. The lower this temperature, the higher the cooling rate. For this reason, even in the production of thin metal wires, it is necessary to cool the cooling liquid to a predetermined temperature before supplying it, but also to suppress the temperature rise as much as possible within the drum that rotates nine times.

However, in the conventional rotating submerged spinning device, the supplied cooling liquid is not renewed during spinning.

The problem is that the temperature rises as the spinning time passes due to the intrusion of molten metal, and the cooling capacity gradually decreases, resulting in a decrease in the quality of the thin metal wire, especially the toughness. It has become clear that the temperature rise in the liquid is due to a large temperature rise at the surface of the liquid where the molten metal enters and first comes into contact with the cooling liquid.

(Means for Solving the Problems) The inventors of the present invention took advantage of the basic features of conventional devices and, as a result of intensive research in order to solve the above-mentioned problems, provided a submerged base in the cooling liquid layer. and continuous supply of cooling liquid.
By efficiently renewing the surface of the cooling liquid layer and suppressing its temperature rise, and by constantly maintaining the cooling liquid at a low temperature, the cooling rate when rapidly solidifying the molten metal ejected from the melting furnace can be reduced. We have achieved a manufacturing device that can produce fine metal wires of excellent quality by holding the metal wires at a high temperature.

That is, 1 the present invention forms a cooling liquid layer on the circumferential inner surface of a cylindrical drum that rotates twice by centrifugal force, jets molten metal into the liquid layer, and rapidly cools and solidifies the jetted metal flow to produce a thin metal wire. In a device for producing 9 cylindrical drums, a cooling liquid supply pipe (13) is disposed inside the cylindrical drum (5), through which the cooling liquid (6) flows in along the inner surface of the drum circular bottom plate (5'). (5) has a drum circular bottom plate (5'
) to form a cooling liquid layer and a row of liquid side plates (12) that regulate the depth of the liquid layer, and in the liquid layer, a pair of partition plates with holes in the lower part. (10).

(10'), and a pair of submerged bases (11) and (11') that constitute a thin metal wire winding chamber (9S) between the partition plates,
This is a thin metal wire manufacturing apparatus characterized in that the metal wires are arranged around each other.

An embodiment of the apparatus of the present invention will be described in detail below with reference to FIG.

In Figure 1, 3 is molten metal, 6 is a cooling liquid, 8 is a molten metal jet stream, and 9 is a thin metal wire.

Heating device 1. Melting furnace 2. Nozzle 41 cylindrical drum 5, insoluble gas introduction pipe 7. The cooling liquid supply pipe 13 and the cooling liquid outlet 14 are respectively provided as in the conventional device (FIG. 2), but on the inner peripheral surface of the cylindrical drum 5,
Partition plate 10.10' with lower holes 10h, 10'h
, liquid weirs 11 and 11' and liquid side plates 12 are specially installed. When spinning the thin metal wire 9 using the apparatus of the present invention, the cooling liquid 6 is constantly introduced from the supply pipe 13 along the inner surface of the circular bottom plate 5' of the rotating cylindrical drum 5, and Pass through it as shown in the arrow and insert it into the liquid weir 1
The thin metal wire 9 is deposited from above 1 into a chamber (hereinafter referred to as the thin metal wire winding chamber) 9S, and then the thin metal wire winding chamber 9
S from above the submerged weir 11' and through the lower hole 10'h of the partition plate 10', overflowing from the liquid side plate 12 and provided in a part of the bottom of the groove formed by the drum side plate 5'' and the liquid side plate 12. By discharging the cooling liquid from the cooling liquid outlet 14, the cooling temperature of the cooling liquid 6 in the metal wire winding chamber 9S is maintained at a constant temperature, and then the metal wire is spun by a conventional method.15 is a liquid receiving drum that covers the cylindrical drum 5 and collects the cooling liquid 6 from the cooling liquid supply temperature 4;
16 is a liquid recovery port.

Next, the relationship between the partition plate 10.10' and the liquid weir ILII' will be explained in detail. First, the partition plate 10.10' will be explained in detail.

The turbulence that occurs when the cooling liquid is supplied from the cooling liquid supply pipe 13 along the inner surface of the circular bottom plate 5' of the rotating cylindrical drum 5 is directly below the nozzle (i.e., directly below the nozzle).

This is to prevent the water from spreading to the cooling liquid in the submerged weir (between 11 and 11'), and is naturally higher than the depth of the cooling liquid and higher than the liquid side plate 12. By setting it higher than 12, preferably 111 or more, disturbances on the surface of the cooling liquid can be prevented. Liquid side plate 1
2 is for keeping the depth of the cooling liquid constant and stable, and is the preferred height.

That is, the depth of the cooling liquid is 10 to 30 fl.

In addition, since the submerged weirs 1'l and 11' are used to efficiently renew the surface of the cooling liquid at the entrance of molten metal as described above, they are always lower than the depth of the cooling liquid and are Liquid side plate 12 for always keeping the depth of liquid constant
It is natural that it is lower than the liquid side plate work 2 and liquid submerged weir 11.
．． The difference in height from 11' is determined by the amount of cooling liquid to be renewed, the size of the cylindrical drum, etc., but it is preferable that the liquid side plate 12 is 0.2 to 10 times higher than the submerged weir 11.11'. Furthermore, the interval between the submerged weirs 11 and 11' becomes wider as the amount of molten metal ejected in one batch increases (although it is preferable to make it as narrow as possible from the viewpoint of stability of the cooling liquid. Generally, one cylindrical drier' When the diameter of the submerged weir 11.11' is 500-10001 m, the spacing between the submerged weirs 11.11' is 20-200 m, preferably 40-150 m.

(Function) In order to suppress the rise in the surface temperature of the cooling liquid at the part where the molten metal enters, which is the object of the present invention, it is generally sufficient to increase the supply amount of the cooling liquid. If the amount of water supplied is large (1), even if the partition plates 10 and 10' are used as in the present invention, the cooling liquid will be disturbed.

Although it is difficult to obtain a straight and continuous thin metal wire, by using a submerged weir 11, 11' like the one of the present invention, the efficiency of surface renewal of the cooling liquid is greatly improved. Even if the amount is small (15 It/min or less), the temperature rise on the liquid surface can be suppressed, and the cooling liquid can be stably maintained.

(Example) The results of manufacturing fine metal wire using the above-mentioned apparatus of the present invention.

For comparison, the results of manufacturing using a conventional device (FIG. 2) are shown below.

Fe7SSil. B1. 200 g of an alloy having the composition (subscripts are atomic %) was melted at 1320° C. and ejected from a nozzle having a diameter of 0.15 φ under a pressure of 4.3 kg/−. Cylindrical drum diameter is 600m, rotation speed is 300r
pm, the distance between the submerged weirs is 50cm, the distance from the top of the submerged weir to the liquid level is 3℃m, the depth of the cooling liquid is 25mm, the amount of cooling liquid is 101cm.
/min, and the cooling liquid was continuously supplied at a temperature of 1°C. Note that during spinning, the surface temperature of the cooling liquid was measured using a thermocouple. As a result, the surface temperature of the liquid rose to 1°C-3°C.

In addition, the obtained amorphous metal thin wire is straight and of high quality.

It did not break even in a test over the entire length (a bending test in which the wrapper was evaluated by running it around a round bar with a diameter of 2.5 mm).

Next, for comparison, a conventional method was conducted using the apparatus shown in FIG. 2 under similar conditions. That is, spinning was carried out at a liquid depth of 25 fl, a cylindrical drum width of 50 mm, a drum diameter of 600 mm, a rotation speed of 30 rpm, and a coolant temperature of 1° C. at the start of spouting. As a result, the liquid surface temperature rose to 1°C=25°C.

In addition, when the same bending test as above was performed on the entire length of the obtained amorphous metal thin wire, it was found that
It broke in several places.

(Effects of the Invention) The apparatus of the present invention improves the cooling liquid layer of the cylindrical drum of the conventional rotating liquid spinning force, makes the liquid flow more effective, and makes it possible to constantly renew the surface. So,
Since the temperature of the cooling liquid layer can be maintained low and the cooling rate can be increased, it has become possible to manufacture thin metal wires of excellent quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view of an embodiment of the device of the present invention, and FIG. 2 is a schematic longitudinal sectional view of a conventional device.

Claims (1)

[Claims] (1) In an apparatus for manufacturing fine metal wire by forming a cooling liquid layer on the circumferential inner surface of a rotating cylindrical drum by centrifugal force, and spouting molten metal into the liquid layer to rapidly cool the jetted metal flow. A cooling liquid supply pipe (13) is disposed inside the cylindrical drum (5) to flow the cooling liquid (6) along the inner surface of the drum circular bottom plate (5').
On the circumferential inner surface of the drum, a row of liquid side plates (12) which form a cooling liquid layer together with the drum circular bottom plate (5') and regulate the depth of the liquid layer are installed. , a pair of partition plates (10), (10') with lower holes bored therein, and a pair of submerged weirs (1) forming a thin metal wire winding chamber (9S) between the partition plates.
1) and (11') are arranged around each other.