JPS59156550A - Production of fine aluminum alloy wire - Google Patents

Abstract

PURPOSE:To produce inexpensively and directly a fine Al alloy wire by ejecting an Al melt added with a specified amt. of Be through a fine hole or slit and solidifying said melt in a fluid. CONSTITUTION:An Al melt added with 0.003-3wt% Be is ejected through a fine hole or slit and is solidified in a fluid such as water, thereby producing a fine Al alloy wire. The jet flow is stabilized and the wire is formed to a uniform diameter by addition of Be. The wire is subjected to cold working at >=5% average reduction of area or to annealing after solidification in the fluid, in some embodiment. The strength and softening resistance of the wire are additionally improved if elements of >=1 kind among Cu, Mg, Si, Zn, Fe, Cr, Zr, Ti and B are added at >=10wt% to the above-described Al melt.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for manufacturing an aluminum alloy shaft used for, for example, l4jII+ conductors and bonding wires.

11 With the miniaturization of electrical and electronic devices, wires such as electrical scarlet conductors and bonding wires are becoming thinner. By the way, aluminum-based thin conductors are conventionally
It is manufactured through a number of steps including ingot casting, rolling, cold wire drawing, intermediate softening (this step and cold wire drawing are often repeated multiple times), and cold wire drawing. Because cold working cannot achieve a large degree of processing at once,
We have no choice but to shorten the machining and heat treatment steps. In particular, aluminum alloy is a material that is difficult to draw into thin wire, so it requires more steps than other metals. Therefore, there are disadvantages in that the overall processing steps are large and the processing cost is also high. Furthermore, since dice are used, the cost associated with dice management and other costs cannot be ignored. Furthermore, since heating and cooling are repeated, it is not satisfactory in terms of energy consumption. As described above, the conventional manufacturing method for silk conductors involves a complicated process, and therefore has various drawbacks, such as low product yield and the need for large-scale equipment. there were.

On the other hand, a rotary underwater spinning method is known as a method for producing round Il made of an amorphous material such as fl-81-B. A round wire is obtained by ejecting the molten material as a jet stream into rotating water.

However, with conductive materials such as aluminum, molten metal particles are not stable. Therefore, WjII! It has not yet been possible to directly produce thin conductors from metal.

Therefore, an object of the present invention is to provide a method for directly manufacturing a thin aluminum base metal wire from an aluminum-based melt at a low cost.

11 - 1 This invention is a thin aluminum alloy wire characterized in that an aluminum melt to which 0.003 to 3 W% of Be has been added is ejected from pores or slits and solidified in a fluid. This is a manufacturing method. By using the [Be-added aluminum melt], subtle changes occur in the viscosity, surface tension, surface oxidation state, etc. of the melt, thereby stabilizing the jet flow of the aluminum melt.

The present invention is based on this knowledge. [0°003
The basis for ~3wt% J is 0.0031! Below 1%,
Based on the fact that the aluminum melt becomes lumpy and it is difficult to obtain a continuous and uniform line, on the other hand, at a concentration of 3% or more, the jet flow stabilizing effect of the aluminum melt becomes saturated and the product cost increases. based on.

Preferably Cu, Mg, Si+Zn, and Fe.

1 selected from the group consisting of Cr, zr, dj, etc.
An aluminum melt containing at most 10% by weight of more than one element is used. As a result, thin aluminum alloy wires having various strengths and excellent softening resistance can be obtained. The reason for specifying "up to 10% by weight" is that if the content exceeds this value, the strength improving effect will be saturated and the product will become brittle due to the occurrence of segregation.

Moreover, when obtaining a thin aluminum alloy wire as a conductor, an aluminum melt having a Be content of 0.003 to 0.3% by weight is used. The reason why it is set as "0°31i amount %" is that if it contains Be at a concentration higher than this, the conductivity decreases and it is not suitable as a material for a conductor. Preferably, Cu l Mill l St, ,
At most one or more elements selected from the group consisting of i'n, Fe, Cr, 7r, TI, etc.
If! An aluminum melt containing .it% is used. As a result, silk conductors with various strengths and excellent softening resistance can be obtained.

[The reason why it is set at 1% by weight J is that if the concentration is higher than this, the conductivity decreases and it is not suitable as a conductor.

As for the method of "spouting from pores or sulin 1- and coagulating in a fluid", various known methods such as a rotating underwater spinning method and a flowing water coagulating method can be used. [In fluid J
Water and various other fluids may be used.

Preferably, after solidification in a fluid, cold working is performed with an average mass reduction rate of 5% or more. This is because uniformity of the cross section, improvement in strength, and improvement in flexibility due to softening and erosion can be achieved. "5
The reason why the area reduction rate is set to ``% or more'' is that the effect of cold working is insufficient if it is less than 5%. Also, after solidification in a fluid, "at least annealing before or after cold working"
You may give alms. This is to further improve the uniformity and strength of the obtained thin aluminum alloy wire.

[At least 21 before cold working or after cold working, so: ■ Annealing may be performed before cold working after solidification, ■ Annealing may be performed after cold working, and ■ Annealing may be performed before and after cold working. Alternatively, after solidification, cold working and annealing may be repeated multiple times.

Furthermore, the outer periphery of the obtained thin aluminum alloy wire may be coated with enamel.

The features of this invention will become clearer from the following description of embodiments with reference to the drawings.

185g (7) m YIJILL Al-Be alloy containing Be with 0°03 superposition in the crucible 1 of the rotating underwater spinning chamber shown in the front sectional view and side sectional view in Figs. 1 and 2. was dissolved. This melting was performed by heating with a heater 2 placed around the crucible 1. Next, from above crucible 1,
Δl-[3e melt is introduced into the water of W1C11 formed on the inner peripheral surface of the rotating drum 3 by the pressure,
It was ejected from the round hole at the bottom of crucible 1. As a result, an aluminum alloy wire 4 having a diameter of 0.1511 was obtained.

The conductivity of this conductor was 54% lAC3.

Friend 1112 In the same manner as in Example 1, an aluminum alloy wire with a diameter of 0.15n11 was obtained using an AA-Be alloy containing 0.25% by weight of Be. Next, after cold drawing to a diameter of 0°0251, this was used as a bonding wire for [C] and showed good characteristics.

Tomo 111 0.02% by weight of Be, 0.311% by weight of Mu, 0
．． An aluminum alloy containing 11 wt.
2s+1 aluminum: Solidified directly onto uneven alloy wire. In addition, in FIG. 3, 1 indicates a crucible, 2 indicates a heater, and a tank 5 for supplying running water is arranged on the F side of the roof 1. To solidify the aluminum alloy, Ar gas is introduced from above Luppo 1 in the direction of arrow
This was done by directly contacting the sample with running water dripping from it.

- 0.04 m 1% of aluminum alloy containing 88 and 0.6 wt. This is directly solidified and then cold drawn to a diameter of 0.0511I.
It was set to 11. Next, the wire was formed into a winding wire using a light annealing, enamel coating, and baking process using a Blair anneal. Compared to conventional manufacturing methods, there were fewer cold working steps and fewer intermediate heat treatment steps, so it was possible to produce with a high yield.

According to the invention, as above, 0.003 to 31i
Since molten aluminum with 1% Be added is ejected through pores or slits and solidified in a fluid, the cold working process can be greatly simplified, which was difficult to process in the past. Silk aluminum alloy wire can be obtained extremely easily, and many conventionally necessary equipment such as dies can be made unnecessary, so the cost of thin aluminum alloy wire can be significantly reduced. Furthermore, since the entire process is greatly simplified, the yield can be dramatically improved, and energy consumption is extremely low, among other useful effects.

The present invention can be applied to various aluminum-based silk alloy wires such as aluminum-based ring conductors, fuse conductors, and bonding wires.

[Brief explanation of the drawing]

1 and 2 are a front sectional view 6 and a new side view showing an example of an apparatus for carrying out the present invention. FIG. 3 is a front sectional view showing another example of an apparatus for carrying out the present invention. In the figure, 4 indicates an aluminum alloy wire as a silk conductor. Figure 1 Figure 2

Claims (7)

[Claims] (1) A method for manufacturing a thin aluminum alloy wire, which comprises jetting out an aluminum melt to which 0.003 to 3% by weight of Be has been added through pores or slits and solidifying it in a fluid. (2) CU as the aluminum melt. Nio, Si, Zn, Fe,
Cr, Zr, TI, B
A material containing at most 10% by weight of one or more elements selected from the group consisting of the following is used. A method for manufacturing a thin aluminum alloy wire according to claim 1. (3) The aluminum melt has a 3e content of 0.
．． The method for producing a thin aluminum alloy wire according to claim 1, wherein a thin aluminum alloy wire as a conductor is obtained by using a thin aluminum alloy wire with a content of 0.003 to 0.3% by weight. (4) Cu as the aluminum melt. M(1, St, Zn, Fe, Or, 7r, T1
．． Using an element containing at most 1% by weight of an element above 18ta selected from the group consisting of 13, etc.
A method for manufacturing a thin aluminum alloy wire according to claim 3.゛ (5) After solidifying in a fluid, cold working is performed with an average reduction in area of 5% or more.Special! A method for producing a thin aluminum base metal wire according to any one of Items 1 to 4 of Ifll Requested by RFL. (6) The thin aluminum according to any one of claims 1 to 5, which is annealed after solidifying in the fluid, at least before, before, or after the cold working. Method of manufacturing alloy wire. (7) The method for producing a thin aluminum alloy wire according to any one of claims 1 to 6, wherein the final step is enameling.