JPH04361857A - Production of metallic wire rod - Google Patents

Abstract

PURPOSE:To continuously produce a wire rod having the constant quality by spout-supplying cooling liquid along inner peripheral face of a cylindrical body and forming a cooling liquid layer flowing down while circling along the inner peripheral face thereof. CONSTITUTION:The cooling liquid spout-supplied along the inner peripheral face of cylindrical body 1 flows down while circling along the inner peripheral face thereof 1 and the cooling liquid layer 31 having almost the constant thickness is formed by the action of centrifugal force at the time of circulating. By this method, molten metal stream 33 supplied into the cooling liquid layer 31 comes in the cooling liquid layer 31 always under the constant condition and as this is cooled and solidified under the constant temp., the quality of the wire rod is stabilized. Further, as space part 12, where is inside of the cooling liquid layer 31 and closed with an upper cover 5 and a lower cover 9, is filled up with inert gas or air in the space part is evacuated, even the molten metal stream 33 is spout-supplied into the cooling liquid layer 31 from a supplying hole 21 opened to the space part 12, surface oxidation of the molten metal 32 is restrained till reaching to the cooling liquid layer 31.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for directly producing metal wire by feeding a molten metal stream into a cooling liquid layer.

0002

[Prior Art] As disclosed in Japanese Patent Publication No. 60-38228, a preferred method for producing amorphous or high-strength metal wires is to create a cooling liquid layer on the inner peripheral surface of a drum rotating at high speed by centrifugal force. There is a method of manufacturing a metal wire by forming a cooling liquid layer, jetting a trickle of molten metal into the cooling liquid layer, and cooling and solidifying it.

0003

However, the method described above involves batch operation, and the rotation of the drum must be stopped each time a wire is taken out from the drum, resulting in poor productivity. In addition, in order to manufacture homogeneous wire, it is necessary to maintain a constant temperature of the cooling liquid layer in the drum, which requires a drum cooling mechanism and a cooling liquid discharge and supply mechanism, making the manufacturing equipment and operations complicated. Become. Further, there is a problem that the liquid level of the coolant layer is disturbed when the coolant is discharged and supplied, making it difficult to maintain constant quality of the wire rod. Furthermore, before the molten metal flow reaches the cooling liquid layer, its surface is oxidized and an oxide film is formed, which reduces the cooling effect and causes quality deterioration.

[0004] The present invention was made in view of the above problem, and an object of the present invention is to provide a method capable of continuously manufacturing wire rods of constant quality in which the formation of oxide films is suppressed using a simple device. .

[0005]

[Means for Solving the Problems] The method for producing metal powder of the present invention is a method for producing a metal wire rod in which a molten metal flow is supplied into a cooling liquid layer moving at high speed, and is cooled and solidified to obtain a metal wire rod. The cooling liquid is jetted and supplied along the inner peripheral surface of the cooling cylinder provided with the lower lid to form a cooling liquid layer that flows downward while swirling along the inner peripheral surface of the cylinder from the upper lid to the lower lid. Drain the coolant from the gap between the bottom end of the cylinder and the bottom cover,
Fill the space inside the coolant layer and closed by the upper and lower lids with inert gas, or exhaust the air from the space, and use the supply hole of the molten metal supply container opened in the space. A flow of molten metal is provided to the cooling liquid layer.

[0006]

[Operation] The coolant that is spouted and supplied along the inner circumferential surface of the cylinder flows down while swirling along the inner circumferential surface of the cylinder, and forms a coolant layer with an approximately constant inner diameter due to the action of centrifugal force during swirling. do. Since this coolant layer is always formed by freshly supplied coolant, a constant temperature can be easily maintained. For this reason,
There is no need to drain or supply cooling liquid from the liquid level for temperature control, and the liquid level remains stable without any disturbance. Therefore, the molten metal flow supplied to the cooling liquid layer always enters the cooling liquid layer under constant conditions and is cooled and solidified at a constant temperature, thereby stabilizing the quality of the wire rod.

[0007] Furthermore, the space inside the coolant layer and closed by the upper and lower covers is filled with an inert gas,
Alternatively, since the air in the space is exhausted, even if the molten metal flow is jetted and supplied to the cooling liquid layer from the supply hole opened in the space, the surface of the molten metal will not reach the cooling liquid layer. Oxidation is suppressed, cooling by the cooling liquid layer is performed quickly, and a high quality wire rod with a thin oxide film can be obtained.

Furthermore, since the wire in the cooling liquid layer flows down while swirling together with the cooling liquid and is discharged from the gap between the lower end of the cylinder and the lower cover, continuous production of the wire becomes possible.

[0009]

EXAMPLE First, an apparatus for carrying out the method of manufacturing a metal wire according to the present invention will be described. FIG. 1 shows a metal wire manufacturing apparatus according to an embodiment, which includes a cooling cylinder 1 for forming a cooling liquid layer 31 on the inner peripheral surface, and a cooling cylinder 1 for supplying a molten metal flow 33 to the cooling liquid layer 31. It is equipped with a molten metal supply container 2 and a pump 3 which is a means for supplying cooling liquid to the cylinder 1.

The cylindrical body 1 has a funnel shape with a circular cross section and a diameter that gradually decreases toward the bottom, the axis of the cylindrical body is placed in the vertical direction, and an upper cover 5 is attached to the upper end of the cylindrical body 1. In the upper part of the cylinder 1, a plurality of discharge ports 8 of a coolant jet pipe 7 are opened at equal intervals from the tangential direction to the cylinder inner peripheral surface, and the pipe axis direction of the jet pipe 7 is aligned with the cylinder axis. It is set diagonally downward by about 0 to 20 degrees with respect to the orthogonal plane. A lower lid 9 is attached to the lower end of the cylindrical body 1 with a certain gap therebetween, and a slit-shaped coolant discharge port 10 is formed between the lower end of the cylindrical body and the lower lid 9. The lower lid 9 is suspended from the upper lid 5 via a support member (not shown).

[0011] When the horizontal distance from the axis of the cylinder to the inner peripheral surface of the coolant layer is r (constant), the flow rate of the coolant from the pump is Q, and the distance downward from the top of the cylinder is y, then The shape of the inner peripheral surface of the body, that is, the horizontal distance R from the axis of the cylinder to the inner peripheral surface is y
It is roughly given by the following formula as a function of . However, g
is the gravitational acceleration.

0012

[Math 1]

A communication pipe 6 is attached to the upper lid 5 and communicates with a space 12 formed inside the cooling liquid layer 31. On the other hand, a collection container 14 is provided on the lower outer periphery of the cylindrical body 1 so as to cover the discharge port 10. Inside the collection container 14, a mesh member 15 is attached below the lower lid 9 to allow the coolant to pass downward and to receive the metal wire. The mesh member 15 can also be configured as an endless belt that is movable in a direction perpendicular to the plane of the paper in FIG.

The coolant jetting pipe 7 is connected to a tank 16 via a pump 3. Further, the bottom of the recovery container 14 is piped to a tank 16, and the coolant that has passed through the mesh member 15 is returned to the tank 16 and used for circulation. The tank 16 is provided with a cooling liquid supply pipe for replenishment (not shown), and a cooler may be appropriately interposed within the tank or in the middle of the circulation flow path. Water is generally used as the coolant, but oil may also be used. In addition, when using water, it is desirable to use water from which oxygen has been removed. Oxygen removal processing equipment is commercially available and easily available.

A supply container 2 is airtightly mounted on the upper lid 5 through a heat insulating member 20, and a nozzle hole 21 bored at the bottom of the container 2 is connected to the upper lid 5 and the heat insulating member 20.
The space 12 inside the cooling liquid layer 31 is opened through a through hole formed in the cooling liquid layer 31 . A heating induction coil 22 is wound around the outer periphery of the supply container 2, and Ar or N is placed on the upper part of the coil.
A pressure medium of an inert gas such as 2 or the like and molten metal are injected under pressure. The supply container 2 is made of a refractory material such as graphite or silicon nitride.

To carry out the present invention, first, the pump 3 is operated to form a cooling liquid layer 31 flowing down the inner circumferential surface of the cylinder 1 from the upper cover 5 to the lower cover 9 while swirling at high speed. That is, the coolant jetted from the coolant jet pipe 7 along the inner circumferential surface of the cylinder 1 flows down while swirling along the inner circumferential surface of the cylinder 1, and is affected by the diameter reduction of the inner circumferential surface of the cylinder. Due to the action of centrifugal force during the rotation, a cooling liquid layer 31 having a substantially constant inner diameter is easily formed along the inner circumferential surface of the cylinder. The cooling liquid layer 3
1 is formed by a constantly fresh supply of cooling fluid, so a constant temperature is easily maintained. Therefore, there is no need to supply or discharge cooling liquid from the liquid level for temperature control, and the liquid level is less likely to be disturbed, resulting in excellent stability.

Next, inside the cooling liquid layer 31 and the upper lid 5
A communicating pipe 6 is connected to the space 12 closed by the lower lid 9.
By force-feeding an inert gas such as Ar gas or N2 gas, the air in the space 12 is discharged to the outside together with the cooling liquid, and the space 12 is filled with the inert gas. After the space 12 is filled with inert gas, it is not necessary to constantly supply gas from the communication pipe 6, and it is sufficient to shut off the on-off valve provided between the communication pipe 6 and the gas source. . Incidentally, in order to easily perform the replacement with inert gas, it is sufficient to provide another communication pipe for air exhaust. Alternatively, the air in the space 12 may be simply evacuated from the communication pipe 6 using a vacuum pump or the like without replacing it with an inert gas.

Next, a pressurized medium is injected into the supply container 2,
The molten metal 32 in the container 2 is ejected from the nozzle hole 21 as a trickle-like molten metal stream 33 and injected into the cooling liquid layer 31 . Since the space 12 is filled with an inert gas or the air inside the space 12 is exhausted, the nozzle hole 21
Surface oxidation of the molten metal flow 33 jetted out is prevented until it is injected into the cooling liquid layer 31. Cooling liquid layer 31
The molten metal stream injected into the
It solidifies and becomes a metal wire. The metal wire is discharged from the discharge port 10 between the lower end of the cylinder 1 and the lower lid 9 together with the cooling liquid forming the cooling liquid layer 31, and is received by the mesh member 15 provided below the lower lid 9. It is separated from the cooling liquid and collected. On the other hand, the coolant that has passed through the mesh member 15 is collected into the tank 16.

In the above embodiment, a funnel-shaped cooling cylinder formed of an upwardly opening rotating paraboloid was shown, but it may also have a truncated conical shape. Alternatively, as shown in FIG. 2, it may have a cylindrical shape. A ring 24 for adjusting the layer thickness of the cooling liquid layer 31 is attached to the lower inner circumferential surface of the cooling cylinder 1 in a replaceable manner with bolts, and cooling can be adjusted by replacing the ring with a different wall thickness (inner diameter). The inner diameter of the liquid layer 31 can be easily adjusted.

Furthermore, in the above embodiment, the supply container 2
The molten metal 32 inside was ejected from the nozzle hole 21 by supplying a pressure medium and applying pressure.
The molten metal in the lower part of the supply container 2 may be pressurized by this, and may be ejected from the nozzle hole 21 and supplied to the cooling liquid layer.

[0021]

[Effects of the Invention] As explained above, the method for manufacturing a metal wire of the present invention provides cooling liquid that is sprayed and supplied along the inner circumferential surface of the cylinder and flows down while swirling along the inner circumferential surface of the cylinder. Since a liquid layer is formed, the temperature of the cooling liquid layer is easily kept constant, and the liquid level is also kept stable. Therefore, by jetting and supplying a molten metal flow into the cooling liquid layer, a metal wire of constant quality can be easily produced. Further, since the metal wire in the coolant layer is discharged from the lower end of the cylinder together with the coolant, continuous production of the metal wire becomes possible, resulting in excellent productivity. In addition, since the space inside the cooling liquid layer is filled with an inert gas or the air in the space is exhausted, the molten metal flow ejected from the supply hole opened in the space is Surface oxidation up to the layer is suppressed, the cooling effect is rapidly cooled without loss, and a high-quality metal wire with suppressed oxide film formation is obtained. Furthermore, when carrying out the present invention, it can be carried out using a simple device that does not have rotating parts, and the equipment cost is low.
Economical.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional overall layout diagram of main parts of a metal wire manufacturing apparatus for carrying out the present invention.

FIG. 2 is a sectional view of a main part of another metal wire manufacturing apparatus.

[Explanation of symbols]

1 Cooling cylinder 2 Molten metal supply container 3 Pump (coolant supply means) 5 Top lid 6 Communication pipe 7 Coolant jet pipe 9 Lower lid 10 Coolant outlet 12 Space section 21 Nozzle hole (supply hole) 31 Cooling liquid layer 32 Molten metal 33 Molten metal flow

Claims (2)

[Claims] 1. A method for manufacturing a metal wire in which a molten metal flow is supplied into a cooling liquid layer moving at high speed, and is cooled and solidified to obtain a metal wire. Cooling liquid is jetted out along the inner circumferential surface of the cylinder, forming a flowing cooling liquid layer from the upper cover to the lower cover while swirling, and the coolant is discharged from the gap between the lower end of the cylinder and the lower cover. A space inside the cooling liquid layer and closed by the upper and lower lids is filled with an inert gas, and the molten metal flow is transferred to the cooling liquid layer through the supply hole of the molten metal supply container opened in the space. A method for manufacturing a metal wire, characterized in that the metal wire is supplied to. 2. A method for manufacturing a metal wire in which a molten metal stream is supplied into a cooling liquid layer moving at high speed, and is cooled and solidified to obtain a metal wire, wherein the inner circumferential surface of a cooling cylinder having an upper lid and a lower lid Cooling liquid is jetted out along the inner circumferential surface of the cylinder, forming a flowing cooling liquid layer from the upper cover to the lower cover while swirling, and the coolant is discharged from the gap between the lower end of the cylinder and the lower cover. The air in the space inside the cooling liquid layer and closed by the upper cover and the lower cover is exhausted, and the molten metal flow is supplied to the cooling liquid layer from the supply hole of the molten metal supply container opened in the space. A method for manufacturing a metal wire, characterized by: