JPS60166144A - Production of metallic wire - Google Patents

Abstract

PURPOSE:To obtain a metallic wire which decreases fluctuation in the wire diameter in the stage of spinning and producing the metallic wire from a molten metal by impressing a directional magnetic field to the molten metal flow in the position where the solidification of the molten metal ejected from a spinning port is not completed. CONSTITUTION:A molten metal 12 melted by a heater 13 in a crucible 11 is pressurized by an inert gas supplied through an introducing port 11a and is ejected as molten metal flow 14 from a nozzle 11b by which a metallic wire is produced. A directional magnetic field is impressed to the molten metal flow 14 by a means 15 for generating the magnetic field in the position where the flow 14 is not solidified yet to increase the apparent viscosity of the flow 14 and to suppress the oscillation of the surface tension wave. The jet flow of the molten metal is thus stabilized and the metallic wire which decreases the fluctuation in the wire diameter is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to the production of metal wire by spinning from molten metal.
This invention relates to an improvement in a metal wire manufacturing method called the so-called melt spinning method.

Description of the Prior Art Conventionally, thin metal wires have been manufactured by a processing method based on the steps of casting, hot working, and cold working.

Of course, such processing methods are carried out in various ways, such as batch or continuous methods, and efforts have been made to improve efficiency.

However, in the conventional metal wire manufacturing method, a casting machine,
Rolling mills, wire drawing machines, heat treatment furnaces, etc. are required, and casting and processing of large-sized metal wires requires large equipment, thus requiring huge capital investment and large manufacturing space. shall be. In addition, since large-sized metal wires are made and processed into the desired size, many processing steps are required, such as heat treatment for hot working and intermediate heat treatment when a large degree of cold working cannot be achieved. heating and cooling must be repeated. Therefore, there is a problem in that a large amount of energy is required for processing, and as the number of steps increases, losses occur between the steps, which requires even more energy. Also,
Because it requires processing such as expansion and contraction, it has been extremely difficult to manufacture using difficult-to-process metal materials.

In order to solve the above-mentioned problems, in recent years, molten metal is directly solidified to obtain a long I! A so-called melt-spinning method has been proposed that involves spinning 1 q of moon. As the melt spinning method, a method has been proposed in which a pressure point is applied to the molten metal using an inert gas or the like to form a jet stream of the molten metal, and the molten metal is solidified into a long member without using a mold. According to this melt spinning method, a metal wire rod having a substantially circular cross section can be obtained. However, unlike the organic woven fabric 1, the molten metal jet A has an extremely unstable shape due to surface tension, viscosity, specific gravity, etc., as shown in FIG.
The disadvantage is that it is difficult to continuously obtain metal wires that are easy to wire and have a uniform wire diameter.

In order to solve the problems of the above-mentioned melt spinning method, as shown in FIG.
A new law has also been proposed. however,
In the Taylor method, extra glass was consumed and it was necessary to remove the glass after the wire was formed, so it could not be said to be preferable for industrial production.

OBJECTS OF THE INVENTION Therefore, an object of the present invention is to overcome the drawbacks of the above-mentioned melt spinning method and to stabilize the jet stream.
It is an object of the present invention to provide a method for manufacturing a metal wire, which makes it possible to obtain a metal wire with little variation in wire diameter.

SUMMARY OF THE INVENTION To summarize, the present invention provides a method for manufacturing a metal wire by jetting molten metal from a spinneret and solidifying the metal wire at a position where the molten metal flow jetted from the spinneret does not complete solidification. A method for manufacturing a metal wire, characterized by applying a directional magnetic field to a molten metal flow.

The metal wires manufactured by this invention include CLl, A
Jlf, A (1, A wire made of metals such as Au, Pb, or their alloys, and is a wire made of high-purity CI, Apl, △Q, AU, which has been particularly prone to unstable jet flow.
, Pb, etc. can be stably produced by the method of the present invention. Further, according to the method of the present invention, in addition to ordinary crystalline metal wires, it is also possible to manufacture amorphous metal wires by appropriately controlling cooling conditions. As described above, in invention C, a directional magnetic field is applied to the molten metal flow at a position where solidification is not completed. By applying this directional magnetic field, it is possible to obtain a metal wire with little variation in wire diameter.
Since the molten metal flow has electrical conductivity, when a magnetic field is applied, the viscosity on the surface increases due to the magnetohydrodynamic effect.
This is thought to be based on preventing the molten metal flow from becoming turbulent. By increasing this viscosity and reducing turbulence in the molten metal flow, the amplitude of surface tension waves in the molten metal flow is suppressed, and fluctuations in the wire diameter are suppressed.

In addition, the directional magnetic field that is one of the features of this invention is that when applied in a direction perpendicular to a surface containing a molten metal flow, the directional magnetic field will cause a drop in the molten metal flow.
) makes the largest contribution to increasing the viscosity of the molten metal flow, but even if a rotating magnetic field or a magnetic field is applied from another direction, it may be possible to further increase the apparent viscosity of the molten metal flow. In addition, if a molten metal flow is passed through a gas or liquid flowing in a laminar flow in the same direction as the molten metal flow, and a directional magnetic field is applied in that state, the viscosity of the molten metal flow will be reduced. In addition to being increased by applying a magnetic field, cooling by laminar flow can further stabilize the molten metal flow.

Effects of the Invention As described above, in this invention, since a directional magnetic field is applied to the molten metal flow ejected from the spinneret at a position where the molten metal flow has not yet completed solidification, due to the magnetic fluid effect, The viscosity of the molten metal flow increases,
Therefore, the amplitude of the surface tension waves of the molten metal flow becomes smaller, the jet flow is stabilized, and the metal wire with less wire diameter fluctuation is produced.
? As a result, the solidified wire can be put to practical use, and even when sizing is performed, a metal wire of a desired diameter can be obtained by only performing a simple process. Furthermore, since the molten metal flow is stabilized, it is possible to take a good distance or time for cooling and solidifying the metal, which makes it possible to set up the manufacturing equipment in a more convenient manner. It also has the effect of increasing the degree of freedom.

Hereinafter, embodiments will be described with reference to the drawings to clarify the features of the present invention.

DESCRIPTION OF THE EMBODIMENTS FIGS. 3 to 5 are partially cutaway longitudinal sectional views showing a metal wire manufacturing apparatus for carrying out the present invention.

In the apparatus shown in FIG. 3, a crucible 11 is filled with metal, and a heater 133 is arranged around the crucible 11 to melt the metal into -C molten metal 12. In addition, an inert gas is introduced above the crucible 11 [Jl 1a
is provided, and from the introduction port 11a, for example, A.
A pressurized inert gas such as R is supplied, and the inert gas causes the molten metal 12 to be ejected as a molten metal stream 14 from the nozzle 11b at the tip of the crucible 11. The molten metal flow 14 is
After being ejected from the spinneret 11b, the molten metal flow 14 is coagulated downward to form a metal wire, but in the apparatus shown in FIG.
is placed. The magnetic field generating means 15 can be composed of a magnet or an electromagnet that generates a DC magnetic field. Third
In the apparatus shown in the figure, a directional magnetic field is applied to the molten metal flow 14 by the magnetic field generating means 15.
ζ, the apparent viscosity of the molten metal flow 14 increases,
The amplitude of surface tension waves is suppressed. Therefore, it is possible to realize a stable molten metal flow 14 with little variation in wire diameter.

The apparatus shown in FIG. 4 is constructed so that water flows around the molten metal stream 14 in a laminar flow in the same direction as the molten metal stream 14. The direction of this water flow is shown by broken lines X and Y.

To create such a water flow, the device shown in FIG. 4 uses a container 22 with a central opening 21.

A magnetic field generating means 15 is arranged around a cylindrical wall 23 surrounding the central opening 21, and water supplied through a water inlet 25J is stored in the space between the cylindrical wall 23 and the outer wall 24. By the way, since the hollow cylindrical wall 23 is configured to have a low outer wall 24, the stored water flows as a laminar flow between the centers [121] as shown in the figure. Therefore, as described above, water flows in a laminar manner in the same direction as the molten metal flow 14, and the water causes the molten metal flow 14 to flow past.
4 is solidified. During this solidification, since a directional magnetic field is applied by the magnetic field generating means 15, the viscosity of the molten metal flow 14 increases and a metal wire with less variation in wire diameter can be obtained.

FIG. 5 shows an apparatus for applying the method of the present invention to a metal wire manufacturing method realized by spinning in a rotating liquid.1 In the apparatus shown in FIG. The stream 14 is stuck to the inner wall of the rotating drum 31 by centrifugal force and solidified in the water layer 32 to become a metal wire. here,
A magnetic field generating means 15 is arranged at a position where the molten metal flow 14 has not yet solidified. For other structures, see Section 3 above.
Since the devices are similar to those shown in the figures, their description will be omitted by adding corresponding reference numerals.

Example 1 In the apparatus shown in FIG. 3, lead was melted and the molten lead was spouted into the atmosphere using argon gas pressure, and the molten lead was spouted into the atmosphere at a position where the molten lead would not solidify. A magnetic field of 5000 Gauss was applied by the field generating means 15 to produce a linear body with a diameter of 0.5 mm. When a magnetic field is applied by the magnetic field generating means 15, the variation in the wire diameter in the longitudinal direction is approximately one-third of that when no magnetic field is applied.
It was confirmed that there was a decrease in

Example 2 In the apparatus shown in FIG. 4, a magnetic field generating means 15 is applied from the outside of the water that melts electrolytic copper and forms a laminar flow from top to bottom.
When a magnetic field of 3000 Gauss was applied and the molten copper was jetted out from the spinneret 11b into the water stream under argon gas pressure, a linear body with a diameter Q of 3 mm could be obtained.

It was confirmed that the variation in the wire diameter in the longitudinal direction of this linear body was reduced to about half of that in the case where no magnetic field was applied.

Example 3 Using the apparatus shown in FIG. 5, electrolytic copper was melted and spouted into running water held by centrifugal force on the inner wall of a rotating drum to obtain a linear body. When manufacturing was carried out by applying a magnetic field of 6000 Gauss by the magnetic field generating means 15 in a Δr gas atmosphere at a position between the spinning nozzle and the surface of the flowing water where the molten steel does not solidify, the surface of the flowing water and the spinning nozzle 11b were distance I1 between
Even if the distance is 1150glIl, a linear body with as little variation in wire diameter as when no magnetic field is applied and the distance is 51 can be obtained Iζ. Therefore 1
It is possible to have a large flexibility in the design of manufacturing equipment,
It can be seen that the workability is also good.

[Brief explanation of drawings]

FIG. 1 is a schematic longitudinal cross-sectional view showing the state of a molten metal flow ejected from a spinneret. FIG. 2 is a longitudinal sectional view illustrating an example of a conventional metal wire manufacturing method. Third
The figure is a longitudinal sectional view of an apparatus for carrying out a first embodiment of the invention. FIG. 4 shows a longitudinal sectional view of an apparatus for carrying out a second embodiment of the invention. FIG. 5 is a schematic cross-sectional view of a pot manufacturing apparatus for carrying out a third embodiment of the present invention. In the figure, 11b is spinning [1, 12 is molten metal, 14
Reference numeral 15 indicates a molten metal flow, and 15 indicates a magnetic field generating means for applying a magnetic field. Patent applicant: Sumitomo Electric Industries, Ltd. Figure 1 Figure 2

Claims (3)

[Claims] (1) In a method of producing a metal wire by spouting gold from a metal spinneret and solidifying it, a directional magnetic field is applied to a flow of molten gold at a position where the flow of molten gold g jetted from a spinneret does not complete solidification. 1. A method of manufacturing a metal wire, characterized by applying: (2) The method for manufacturing a metal wire according to claim 1, wherein the directional magnetic field is applied in a direction perpendicular to a surface containing the molten metal flow. (3) The directional magnetic field is applied to the molten metal flow while passing through a cooling fluid.
The method for manufacturing a metal wire according to item 1 or 2.