JPS5930419A - Manufacture of compound wire rod - Google Patents

Abstract

PURPOSE:To manufacture a compound wire rod with a thick coating by a samll-sized device including small-thick size without spoiling the linearity of a core material by coating the core material with an alloy covering material which has a lower fusion point than it by extrusion in a half-fused state. CONSTITUTION:Alloy 7 as a covering material is put in the container 1 of an extruder and heated by a heater 3 into a half-fused, i.e. solid-liquid mixed state, and is made to uniform by a stirring device 9 when necessary. On the other hand, while the core material is inserted from a hollow mandrel 5, pressure is applied to a ram 2 and the compound wire rod 8 is extruded from an extruding die 4. Tensile force is applied from in front of the core material 6 during the extrusion to increase the speed of the extrusion. Said alloy 7 has such composition that eutectic reaction is caused at temperature lower than the fusion point of Al by adding >=1 kind of elements among Si, Sn, Mg, Zn, Cu, Ga, and Ge to Al, and fine solid-liquid mixture is obtained preferably. The core material 6 uses a material such as iron having a higher fusion point than the alloy 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for manufacturing a composite wire in which the outer periphery of a core material is coated with different alloys.

(Background Art) In order to cover the outer periphery of a high-strength material core material such as a steel wire with a conductive or corrosion-resistant outer covering material such as A#+Zn or an alloy thereof, a conventional method such as that widely used is adopted. There were many.

Namely, there are methods such as extruding a sheath metal around a core material, a method of compacting a sheath metal processed into powder, a method of melting or electroplating, and a tape cladding method.

However, in extrusion coating when manufacturing ordinary composite wire by extrusion method, large pressure is required to overcome the deformation resistance of the outer sheath metal and extrude, so large extrusion equipment is required. There was a drawback that the extrusion equipment was subject to significant wear and production was limited.

In addition, even if the extrusion equipment has sufficient extrusion power, if extrusion is performed under such pressure that the outer sheath metal comes into close contact with the material, the linearity of the core material may be impaired, resulting in fine wires and strength. It has been difficult to process composite coatings on materials that are not large enough.

In addition, the compacting method has the disadvantage that if there are insufficiently polished areas in the core material ω, metal bonding will be insufficient, and the adhesion between the core material and the outer covering material will be poor.

Next, among the plating methods, hot-dip plating has a limit to the plating thickness, making it difficult to achieve thick walls, and the properties may deteriorate due to heat effects.Although electroplating allows thick walls in principle, it takes a long time. , manufacturing capacity is extremely reduced, and alloy coating is difficult.

In addition, in the tape cladding method, if the tee scaling is insufficient, parts with poor adhesion occur, the process is complicated, and furthermore, it is impossible to manufacture with a jacket metal that is difficult to weld.

(Disclosure of the Invention) The present invention has been made to solve the above-mentioned problems, and by extruding the alloy jacket material in a semi-molten state, the extrusion pressure can be reduced, and the extrusion device can be miniaturized. It is an object of the present invention to provide a method for manufacturing a composite wire material that enables the production of composite wires in a thin size, does not impair the linearity of the core material, and allows thick coating.

The present invention is a method for manufacturing a matching wire rod characterized by a crosspiece in which an alloy jacket material having a lower melting point than the core material is extruded and coated on the outer periphery of the core material in a solid-liquid mixed state.

The extrusion device used in the present invention is not particularly limited, and may be, for example, a billet extruder, a continuous extruder, a friction-driven extrusion device, or the like.

The alloy used for the outer shell is an alloy with a lower melting point than the core material, such as A5. It is an alloy made by adding other elements to a pure metal such as Zn or Sn, and it has a composition that causes a eutectic reaction at a temperature lower than the melting point of the pure metal, which makes it possible to obtain a fine solid-liquid mixture in a semi-molten state. That's what I expected.

For example, Si, Sn, Mg, Zn, Cu on All
, an alloy containing one or more elements selected from Ga and (J'Ge) (Example 7.5056 alloy), Zn
VCA (1, an alloy containing one or more elements selected from among Sn, Cd, and Ga (e.g., Zn-5% l)
', (1), etc. are used.

Note that the above Al1 alloy and Zn alloy may contain elements other than those mentioned above.

In addition, the core material used for the core material is a linear body of metal or alloy with a higher melting point than the above-mentioned outer sheath material alloy, such as steel (iron), nickel, copper, wholesale tungsten, etc., or alloys thereof. The line consisting of is used.

Therefore, during extrusion coating, the core material is in a solid phase state, compared to the solid-liquid mixed state of the outer covering material.

Hereinafter, the present invention will be explained by examples using the drawings. FIG. 1 is a sectional view for explaining an embodiment of the method of the present invention. In the figure, 1 is a container, 2 is a ram, and a heater 3 for heating is provided around the container 1. A hollow mandrel 5 for inserting a core material is provided on the opposite side of the extrusion die 4. If necessary, a stirring device 9 is installed in the container 1 in order to thoroughly mix the same phase and liquid phase of the outer covering material alloy 7 to form a so-called slurry state before extrusion.
It is desirable that the extrusion surface condition is improved.

Alloy 7 (e.g., Aff alloy) is charged into the container l of the extruder, and heated with heater 3 to semi-melt the alloy 7 and make it into a solid-liquid mixed state. When stirring is performed using the stirring device 9, the core material 6 is inserted through the hollow mandrel 5, and pressure is applied to the ram 2, the composite wire 8 is extruded from the extrusion die 4. During extrusion, if necessary, tensile force may be applied from the front of the core material to increase the extrusion speed.

FIG. 2 is a sectional view showing an example of a composite material coated by extrusion in this manner, where 6 is a core material and 7 is an alloy.

In this case, since the core material 6 has a higher melting point than the alloy 7, it does not melt even when the alloy is in a semi-molten state and maintains its strength. Since the material is extruded with small deformation stress, even if the core material is thin and the alloy layer is thick, it can be composited extremely easily.

Note that the composite wire 8 may be used as it is, or may be coated with a thick size close to the final size and then subjected to wire drawing for the purpose of improving dimensional accuracy.

(Example) Using the extrusion device shown in Fig. 1, the core material 6 was 4 mm.
f steel wire, using 5056 A# gold alloy as alloy 7,
5056 alloy at 620°CK-'r liquid phase fraction approximately 509
6 and extrude it into a slurry state, and pull it out by applying tensile force from the front of the core material to form a coating alloy with a thickness of 0.5
A 5056 alloy coated steel wire with an outer diameter of 5 mm was prepared.

As a result, a composite wire rod with excellent erection was obtained with good productivity using only a small extrusion pressure.

(Comparative example) Using a conventional extrusion device, on the same steel wire material as in the example,
An attempt was made to extrude the same 5056A, 5 alloy in a solid state, but an experimental extruder capable of carrying a load of 30 tons was unable to extrude -1 due to insufficient output.

(Effects of the Invention) The method for producing the composite phase of the present invention configured as described above (the fourth-order effects occur).

(b) Since the outer periphery of the material is extruded and coated with an alloy covering material with a lower melting point in a solid-liquid state, the outer covering material is in a semi-molten state, so the extrusion pressure is reduced, so the extrusion Equipment is miniaturized, equipment costs are reduced, and even if the extrusion ratio is large, extrusion is possible with low power, and the core material is not deformed.
＜Since the linearity is not impaired, it is also possible to extrude small items.

(b) Since the deformation resistance of the sheathing material is extremely reduced in a solid-liquid mixed state, even a composite wire with a small difference in deformation resistance between the core material and the sheathing material can be extruded.

(c) It is difficult to achieve thick coating using the plating method, but since the present invention uses extrusion, the thick coating is bloody.

(b) During extrusion, an extremely thin but wind-resistance layer is formed, so the adhesion between the core material and the outer sheathing material is good, and therefore wire drawing after extrusion coating is easy.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view illustrating an embodiment of the method of the present invention. FIG. 2 is a sectional view showing an example of a composite wire rod obtained by an example of the method of the present invention. I...container, 2...ram, 3...heater, 4...extrusion die, 5...hollow mandrel, 6...7
-Iri, 7... Alloy, 8... Composite wire removal, 9... Stirring device.

Claims (5)

[Claims] (1) A method for producing Hatsudai wire fibers, which is characterized in that the outer periphery of the core material is coated with an alloy outer shell having a lower melting point than the core material by extrusion in a solid-liquid mixed state. (2) The alloy has h(l with Si, Sn, Mg+
1 selected from Zn, Cu, Ga and Ge
2. The method for producing a composite wire according to claim 1, which is made by adding more than one element and has a composition that causes a eutectic reaction at a temperature lower than the melting point of Δe. (3) A method for manufacturing a composite wire according to claim 1 or 2, wherein the material is a steel wire. (4) The method for manufacturing a composite wire according to claim 1, 2 or 3, wherein the extrusion coating is performed by applying a tensile force from the front of the core material. (5) A method for producing a composite wire according to claim 1, 2, 3, or 4, which comprises performing wire drawing after extrusion coating.