WO2016003068A1 - Aluminum alloy conductor wire and method for manufacturing same - Google Patents

Abstract

The present invention relates to an aluminum alloy conductor wire and a method for manufacturing the same. Particularly, the present invention relates to an aluminum alloy conductor wire and a method for manufacturing the same, the aluminum alloy conductor wire having both an excellent mechanical strength, such as a tensile strength, and excellent elongation and electric conductivity, a trade-off existing between the elongation and the strength.

Description

 【Specification】

 [Name of invention]

Aluminum Alloy Conductor Wire and Manufacturing Method Thereof

The present invention relates to an aluminum alloy conductor wire and a method of manufacturing the same.

Specifically, the present invention relates to an aluminum alloy conductor wire having excellent elongation in trade-off and excellent electrical conductivity, and a method of manufacturing the same, while having excellent mechanical strength such as tensile strength.

 Background Art

Aluminum conductor wire is lighter and cheaper than copper conductor wire and copper alloy conductor wire, easy to cast, easy to alloy with other metals, easy to process at room temperature and silver, and corrosion resistance in air It is widely used for conductors such as overhead transmission lines, underground transmission lines, and building cables for reasons of excellent durability and the like.

However, pure aluminum conductor wire has excellent properties such as elongation and electrical conductivity, but mechanical strength such as tensile strength is insufficient. Especially, cables used in severe vibration environments such as cables used in automobiles, aircrafts, and motor cylinders. When used as a conductor, the mechanical strength which determines the resistance to vibration needs to be improved.

Therefore, aluminum (A1), iron (Fe), copper (Cu), magnesium (Mg),

Techniques for improving the mechanical strength of aluminum alloy conductor wires through alloys with alloying elements such as zirconium (Zr) and beryllium (Be) are known.

However, in the conventional aluminum alloy conductor wires, an excessive amount of alloying elements must be added to achieve the desired mechanical strength, so the elongation and the electrical conductivity, which are in conflict with the mechanical strength, are greatly reduced, There is a problem such as required or long time heat treatment, and furthermore, environmental regulation

Alternative Site (Article 26) Due to the addition of beryllium (Be), there was a problem of causing environmental problems and increasing production costs.

In addition, when a small amount of alloying element is added in order to avoid a large decrease in elongation, electrical conductivity, etc. of the aluminum alloy conductor wire, the improvement of mechanical strength of the aluminum alloy conductor wire is uneven, or the mechanical strength of the aluminum alloy conductor wire There is a problem in that the manufacturing process is complicated, such as an additional grain refinement process is required to improve.

In this situation, the cable industry can simultaneously replace the mechanical and electrical conductors such as tensile strength, elongation at the same time, and electrical conductivity to replace copper and copper alloy conductors with aluminum alloy conductors.

Although researches to improve are being actively conducted, the optimal combination of alloying elements and process conditions for aluminum alloy conductor wires is not established. In particular, as the wire diameter of aluminum alloy conductor wires decreases, tensile strength increases, but elongation is increased. And since the electric conductivity tends to decrease, it is extremely difficult to find the optimal combination of alloying elements in the case of a thin wire conductor wire having a diameter of 0.1 to 0.5 画, and thus suffers a lot of technical progress.

 [Detailed Description of the Invention]

 [Technical problem]

SUMMARY OF THE INVENTION An object of the present invention is to provide an aluminum alloy conductor wire which is excellent in mechanical strength such as tensile strength, elongation in conflict with this, and electrical conductivity, even when the diameter is small.

In addition, it is an object of the present invention to provide an aluminum alloy conductor wire that is environmentally friendly and can reduce the production cost.

Furthermore, another object of the present invention is to provide a method for manufacturing the aluminum alloy conductor wire, which is simplified in the manufacturing process and thus the manufacturing cost is reduced. Technical Solution

In order to solve the above problems, the present invention, 0.3 to 0.6% by weight of iron (Fe), 0.3 to 0.5% by weight of copper (Cu), 0.001 to 0.01% by weight of boron (B) and 0.01 to 0.03% by weight of titanium (Ti), with the remainder being aluminum (A1) And aluminum alloys consisting of inevitable impurities

An average distance between precipitates formed from the composition, which is the average of the distances between the precipitates distributed within the unit radius (50), based on any precipitate, from 2 to 15 jwm, with an average diameter of from 0.15 to 0.5 kPa, Provides aluminum alloy conductor wires. Here, the boron (B) and the: titanium (TO is an Al-Ti-B intermetallic compound

An aluminum alloy conductor wire, which is present, is provided.

Further, the precipitate provides _{: an} aluminum alloy conductor wire, characterized in that it comprises an Al-Fe intermetallic compound, an Al-Cu intermetallic compound, and an Al-Ti-B metal galvanized compound.

On the other hand, the aluminum alloy conductor electric wire characterized by having a grain average particle diameter of 50 or less is provided.

An aluminum alloy conductor wire is provided, characterized in that the tensile strength is at least 140 MPa, the elongation is at least 15%, and the electrical conductivity is at least 59% IACS.

In addition, the inevitable impurities may include: vanadium (V), chromium (Cr) and nickel (Ni), each of the inevitable impurities; the content is 0.01% by weight or less, and inevitable

An aluminum alloy conductor wire is provided, characterized in that the total content of impurities is 0.01 weight or less.

On the other hand, manufacturing an aluminum alloy composition containing iron (Fe) and copper (Cu), the remainder is made of aluminum and unavoidable impurities, adding Al-Ti -B alloy immediately before the casting of the aluminum alloy composition ， Aluminum alloy wire comprising the steps of: manufacturing an aluminum alloy wire by continuous casting rolling of the aluminum alloy composition, drawing the aluminum alloy wire, and subjecting the drawing process to heat treatment of an aluminum alloy wire. It provides a method of manufacturing. Here, before the addition of the Al-Ti-B alloy, further comprising the step of performing a degassing and foreign matter filtration of the aluminum alloy composition, it provides a method of manufacturing an aluminum alloy conductor wire. _:

In addition, the temperature of the continuously cast rolling aluminum alloy composition is from 730 to

Provided is a method for producing an aluminum alloy conductor wire, characterized in that 900 ^° C. Furthermore, the heat treatment is performed for 2 to 12 hours at 260 to 360 ^° C., the grain size after the heat treatment is characterized in that 50 _m or less, provides a method for producing an aluminum alloy conductor wire.

[Effective Effect] _:

The aluminum alloy conductor wire according to the present invention is selected from a specific alloy element and

Through precise control of the mixing ratio, even when the diameter is small, the mechanical strength of the aluminum alloy conductor wire, the elongation in conflict with the electrical conductivity, and the like can be simultaneously improved.

Does not contain an aluminum alloy conductor wires alloying elements it does not at the same time of cold environment using an alloying element that causes an environmental problem according to the invention in an amount in excess production _costs: shows a right ^ effect, which may be reduced

Since the manufacturing method of the aluminum alloy conductor wire according to the present invention does not require a separate grain refinement process, the manufacturing process is simple, and thus, the manufacturing cost is reduced, and the characteristics of the aluminum alloy conductor wire manufactured by precise process conditions and control are obtained. It shows the excellent effect which can be improved evenly.

 [Brief Description of Drawings]

1 is a flowchart of a manufacturing process of an aluminum alloy conductor wire according to the present invention. Figure 2 shows a SEM photograph of the aluminum alloy conductor wire of Example 1 and the aluminum alloy conductor of Comparative Example 5 _: SEM picture of the wire according to the present invention.

Figure 3 shows the distance between the precipitate in the SEM photograph of the aluminum alloy conductor wire of Example 1 according to the present invention and the SEM photograph of the aluminum alloy conductor wire of Comparative Example 5. [Form for implementation of invention]

 Hereinafter, preferred embodiments of the present invention will be described in detail. However, the invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and the spirit of the present invention may be fully conveyed to those skilled in the art.

The aluminum alloy composition for forming the aluminum alloy conductor wire according to the present invention contains aluminum (A1) as a main component, and additionally iron (Fe), copper (Cu), boron (B) and titanium (Ti) as alloy elements. It contains. The aluminum alloy conductor wire

And an average diameter of 0.15 to 0.5 mm Anse ray, such thin wires of aluminum alloy conductor wires is extremely improving the elongation, and electric conductivity and so on in the mechanical strength, this trade-off, such as tensile strength at the same _time: Although difficult, under This can be achieved through grain refinement by controlling the distance between the alloying elements described and the optimum mixing ratio and the precipitates forming the grains. Iron (Fe) as the alloying element is present as an AI-Fe intermetallic compound in the matrix. In particular, the Al-Fe intermetallic compound is most precipitated during the heat treatment step of the aluminum alloy conductor wire manufacturing process to inhibit the growth of the crystal grains to improve the mechanical strength, such as tensile strength.

Here, the content of iron (Fe) is the total weight of the aluminum alloy composition

It may be 0.3 to 0.6% by weight on the basis. When the iron (Fe) content is less than 0.3 wt%, the degree of improvement in the mechanical strength of the aluminum alloy conductor wire is insufficient, whereas when the content of the iron (Fe) is greater than 0.6 wt%, the Al-Fe intermetallic compound becomes coarse: Extrusion property may fall, and elongation, electrical conductivity, etc. of an aluminum alloy conductor wire may fall large.

In addition, as the alloying element, copper (Cu) is dissolved in aluminum (A1) to increase the corrosion potential of the aluminum alloy to improve the corrosion resistance of the aluminum alloy, and like Al (Cu) in the matrix (Ma) between the Al—Cu metal Heat treatment by being present as a compound Precipitation in the step to suppress the growth of grains to improve the mechanical strength, such as tensile strength.

Here, the content of copper (Cu) may be 0.3 to 0.5% by weight based on the total weight of the aluminum alloy herb. When the copper (Cu) content is less than 0.3% by weight, the degree of improvement in mechanical strength of the aluminum alloy conductor wire is insufficient, whereas when the content of copper (Cu) is greater than 0.5% by weight, the intermetallic compound is coarse to reduce the extrudability of the aluminum alloy composition. Aluminum alloy conductor wire, elongation, electrical conductivity, etc. can be greatly reduced.

Boron (B) as the alloying element promotes the precipitation of intermetallic compounds in the heat treatment step during the manufacturing process of the aluminum alloy conductor wire, thereby suppressing coarsening of crystal grains, thereby improving the strength of the aluminum alloy conductor wire, and lowering the electrical conductivity. It will act to suppress.

Here, the content of the boron (B) may be 0.001 to 0 0Γ weight% based on the total weight of the aluminum alloy composition. When the boron (B) content is less than 0.001% by weight, the degree of improvement in mechanical strength of the one: luminum alloy conductor wire is insufficient. On the other hand, when the content of the boron (B) is greater than 0.01% by weight, an intermetallic compound is generated to generate an aluminum alloy conductor wire. The electrical conductivity of can be greatly reduced.

As the alloying element, titanium (Ti) has a melting point of 1,800 ^° C., so that the melting point of iron (Fe), which is another alloying element, is 1540 ^° C., and that of copper (Cu) is higher than 1084.5 ^° C., so that Al-Ti-B Alloy rods are added in the form of, for example, and in the form of A1-TL in aluminum alloys _:

By being uniformly present as a precipitate, it further reduces the average distance between precipitations, which determines the size of the grains of the aluminum alloy, and consequently, further enhances the strength of the aluminum alloy conductor wire by miniaturization of the grains. . The precipitates at the average distance between the precipitates include not only Al-Ti intermetallic compounds, but also Al-Fe intermetallic compounds Al-Cu intermetallic compounds, and the like; average distances between precipitates reduced by addition of titanium (Ti); That is, the average of the distances between the precipitates distributed within the unit radius 50 based on any precipitate is preferably 2 It may be from 15 to 15 urn, more preferably from 2 to 5.5 / m, and thus the average distance between the precipitates is reduced, the precipitate can act as a barrier (barrier) to inhibit the growth of the grains. That is, since titanium (Ti) acts as a grain refining mechanism and the average distance between precipitates is reduced, the average grain size of the grains is controlled to about 50 _m or less, preferably about 10 to 40 jams. In addition, aluminum alloys containing titanium (Ti) can be refined by Al-Ti intermetallic compounds as described above, so that heat treatment is performed at a higher temperature or for a longer time to improve the elongation of the aluminum alloy. Even though the tensile strength is lowered compared to titanium (aluminum alloy without TO, the titanium alloy is not added and titanium is not added.

Compared to the elongation of the aluminum alloy exhibiting tensile strength it can exhibit a significantly improved elongation.

Here, the ^ group titanium (Ti) and the content may be 0.01 to 0.03 weight ¾ based on the total weight of the aluminum alloy composition. When the content of titanium (Ti) is less than 0.01% by weight, it is difficult to exert grain refinement effect of the aluminum alloy conductor wire, whereas when it exceeds 0.03% by weight, a large amount of impurities are added to the aluminum alloy to make a coarse metal compound. Above: Aluminum alloy

Extrudability of the composition and tensile strength of the aluminum alloy conductor wire and

The conductivity may be reduced. _i:

The aluminum alloy composition ¾ is an impurity inevitably added in the manufacturing process in addition to aluminum (A1) as a main component and iron (Fe), copper (Cu), boron (B), and titanium (Ti) as an alloying element, for example, Vanadium (V), chromium (Cr), nickel (), and the like. The content of each of the unavoidable “pures” may be, for example, 0.01 wt% or less, and the total content of the unavoidable impurities may be, for example, 0.1 wt ¾> or less. :

The aluminum alloy conductor wire manufactured from the aluminum alloy composition

Fine from iron (Fe), copper (Cu) and titanium (Ti) added as alloying elements Uniform distribution of precipitates, that is, due to the reduction of the distance between precipitates and the promotion of precipitation of intermetallic compounds such as Al-Fe and Al-Cu by boron (B)

It exhibits a tensile strength of 140 MPa or more through additional grain refinement, and the elongation is improved more than 15% and electrical conductivity to 59 ACS or more because the grain refinement enables long-term heat treatment at high temperature while minimizing the decrease in tensile strength. Excellent effect can be achieved.

1 is a flow chart of the aluminum alloy conductor wire and manufacturing process according to the present invention. As shown in Figure 1, of the aluminum alloy conductor wire according to the present invention

The manufacturing method may include the following steps a) wedge e).

a) preparing an aluminum alloy composition (molten metal) containing 0.3 to 0.6% by weight of iron (Fe) and 0.3 to 0.5% by weight of copper (Cu), and the remaining balance consisting of aluminum and inevitable impurities (S110);

b) 0.001 to 0.01% by weight of boron (B) and 0.01 to 0.03% by weight of titan (Ti) by adding Al-m-B alloy immediately before casting of the additive aluminum ¾ gold composition

Preparing an aluminum alloy composition comprising a step (S120);

c) step (S130) for producing the aluminum alloy wire by the continuous casting and rolling of the aluminum alloy _{composition:;}

d) drawing the aluminum alloy wire: drawing (S140); And:

e) to 260 to 360 ^° C.

Heat treatment for 2 to 12 hours in the temperature range (S150) :.

In particular, the method of manufacturing an aluminum alloy conductor wire according to the present invention may further include: a) degassing and submaterial filtering of the aluminum alloy composition after step S110. Here, the degassing and sub-material filtration step is a)

It is desirable to perform between step S110 and b) step S120. b) If the degassing and foreign matter filtration step after step S120 is carried out, the A1-Ti intermetallic compound may be degassed with the gas. _: As described above, since the precipitates of the Al-Ti-B alloy added in step b) are uniformly distributed in the matrix, the distance between the precipitates that determine the grain size is reduced, and as a result, the grain refinement is achieved. Mechanical strength such as tensile strength of the aluminum alloy can be improved.

As a result, the method of manufacturing the aluminum alloy conductor wire according to the present invention does not require a separate grain refinement process, thereby simplifying the manufacturing process and thus reducing the manufacturing cost.

On the other hand, c) in step (S130); The temperature of the aluminum alloy composition applied to the continuous casting rolling is preferably 730 to 900 ^° C. remind

The reason for limiting the injection temperature of the composition applied to continuous casting rolling as described above is to obtain a solid solution which is an intermetallic compound, that is, a casting having a dense microstructure. Here, when the injection silver of the aluminum composite composition exceeds 90C C, there is a problem in that the casting microstructure is coarse, while in the case of less than 730 ^° C ¾ the lack of fluidity of the composition can not fill the mold space tightly Miss Run may occur. Here, the continuous casting rolling method

Can be replaced by Cont inuous: cast ing

C) The aluminum alloy wire produced in step (S130) is most preferably cast in a size of about 10 匪 diameter so that it can be usefully applied to automotive cables, according to the use of the aluminum alloy conductor wire according to the present invention After the casting, the diameter of the aluminum alloy wire can be appropriately selected by a person skilled in the art.

55d) In the drawing process of step S140, the cast aluminum alloy wire is processed to reduce the cross section to produce an alloy wire of a predetermined specification. For example, step d) (S140) is a process for drawing a wire drawn from the aluminum alloy wire manufactured in step c) (S130) with an average diameter of about 2 ram, and again the average diameter of about 0.15 to 0.5 mm A thin wire process may be included as a wire rod. d) The aluminum alloy wire drawn in step S140 is heat-treated by the thermomembrane process of step S150 in solid or stranded wire. In the aluminum alloy wire, the elongation is improved through recovery by the stress relief after the internal stress of the alloy is increased by the heat treatment. However, when the heat treatment temperature is excessively high or the heat treatment time is excessively delayed, the toughness may be largely damaged by coarsening of grains. Therefore, it is most efficient to stop the heat treatment when the elongation of the aluminum alloy wire is improved to the maximum by the heat treatment and the tensile strength is not largely damaged, that is, when the average grain size of the crystal grains is maintained at about 50 or less.

In the e) heat treatment process of step (S150), the average distance of the precipitate is 2 to 15 ^, that is, the process conditions that the elongation can be improved as much as possible while maintaining the average particle diameter of 50 or less as the heat treatment temperature is about 260 to 360 ^° C., heat treatment time may be about 2 to 12 hours. Within the range satisfying the heat treatment process conditions, the lower the heat treatment temperature increases the heat treatment time, while the higher heat treatment temperature shortens the heat treatment time, thereby minimizing the extent to which the tensile strength decreases by heat treatment. The rate of improvement can be maximized.

_EXAMPLES:

 1. Preparation

As shown in Table 1 below, an aluminum alloy wire including an alloy component and the remainder of aluminum (A1) and unavoidable impurities was prepared, followed by a drawing process and a heat treatment process (310 ^° C., & hr) to perform an example: And wire specimens according to each of the comparative examples were prepared. The content and units of the alloying components shown in Table 1 below are by weight.

2. Property evaluation

 1) Evaluation of tensile strength and elongation

Tensile strength and elongation of each aluminum alloy wire specimens according to the Examples or Comparative Examples were measured at a rate of lmm / s with both ends of the specimen fixed using a wire gripping device in accordance with ASTM B557. After measuring the force required to pull, the tensile strength is measured using the offset method. Elongation was calculated from the length of the specimen at the time the specimen was broken, and the results are shown in Table 1 below.

2) Evaluation of electrical conductivity

The electrical conductivity of each of the aluminum alloy wire specimens according to the Examples or Comparative Examples was calculated by measuring the electrical resistance by the Calvin Double Bridge method according to the ASTM B193 standard.

 Table 1

In the case of alloy wire specimens, the average distance between precipitates is reduced by the optimal combination of alloying elements, the minimum content of alloying elements and the optimal blending ratio, thereby achieving finer grain size, and improving elongation to 15% or more due to heat treatment. Nevertheless, it was confirmed that the tensile strength could be maintained at 140 MPa or more by minimizing the decrease in tensile strength, and furthermore, by minimizing the content of alloying elements.

It was confirmed that the electrical conductivity can be maintained above 59WACS.

On the other hand, in the specimens of Comparative Examples 1 and 3, an extremely small amount of alloying elements of iron (Fe) or copper (Cu) is added in the aluminum alloy to improve the tensile strength of the aluminum alloy.

In contrast, the specimens of Comparative Examples 2 and 4 exhibited extremely high amounts of alloying elements of iron (Fe) or copper (Cu), so that the electrical conductivity of aluminum alloys was lower than 59 ACS. It was confirmed that the lowered. In addition, the specimen of Comparative Example 5 is not added to the titanium (Ti) and boron (B) for grain refinement, although the alloying elements of iron (Fe) and copper (Cu) to improve the tensile strength of the aluminum alloy is added in an appropriate amount As a result, the distance between the precipitates increased, thereby coarsening the crystallized grains, and as a result, it was confirmed that the tensile strength greatly decreased during the heat treatment to improve the elongation. On the contrary, the specimen of Comparative Example 6 was made of titanium (Ti) and boron. Excessive addition of (B) produced rather coarse intermetallic compounds, which resulted in a significant decrease in tensile strength and electrical conductivity. In addition, the specimens of Comparative Examples 7 and 9 had an excellent tensile strength because the diameter of the wire was excessively small, but the elongation and electrical conductivity of the upper layer were greatly reduced, whereas the specimens of Comparative Examples 8 and 10 had the diameter of the wire. Due to this excessive size, the elongation and electrical conductivity were excellent, but the tensile strength was significantly reduced. For reference, FIGS. 2 and 3 are scanning electron microscope (SEM) comparison photographs showing the distance between precipitates and the degree of grain refinement according to the addition of titanium (Ti) in Examples 1 and 5.

2 and 3, the aluminum alloy conductor wire according to the present invention reduces the distance between the precipitates that determine the size of the grains by the addition of titanium (Ti), thereby causing the grains to be refined. In addition, it is possible to minimize the degree to which the tensile strength decreases during heat treatment to improve the elongation of the aluminum alloy wire, and as a result, it shows an unpredictable excellent effect of simultaneously improving the tensile strength and elongation in the upper layer relationship.

In addition, since only a small amount of friction (Fe) and copper (Cu) in the alloy elements can be achieved by grain refinement, sufficient tensile strength can be achieved, thereby minimizing the content of the alloy element as a whole, thereby minimizing the decrease in the electrical conductivity. That shows excellent effect.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to various modifications and changes to the present invention without departing from the spirit and scope of the invention described in the claims described below You can do it. Therefore, it should be regarded that all modifications are included in the technical scope of the present invention if they basically include elements of the claims of the present invention. _'

Claims

[Range of request]  [Claim 1] 0.3 to 0.6% by weight of iron (Fe), 0.3 to 0.5% by weight of copper (Cu), 0.001 to 0.01% by weight of boron (B) and 0.01 to 0.03% by weight of titanium (Ti), with the remainder being aluminum (A1) And an aluminum alloy consisting of inevitable impurities _: formed from the composition, Distributed within 50 m of a unit radius relative to any precipitate An aluminum alloy conductor wire having an average distance between precipitates, which is an average of distances between precipitates, of 2 to 15 jams, and an average diameter of 0.1 to 0.5 mm 3.  [Claim 2] The method of claim 1 Hing ^", The boron (B) and the titanium (TO is an Al-Ti-B intermetallic compound, characterized in that the aluminum alloy conductor wire.  [Blue port 3] The method of claim 2 The precipitate is characterized in that the Al-Fe intermetallic compound, Al-Cu intermetallic compound and Al-Ti-B intermetallic fire, aluminum alloy conductor wire.  [Claim 4] The method according to any one of claims 1 to 3, An aluminum alloy conductor wire, wherein the grain average particle size is 50 or less.  [Claim 5] The method according to any one of claims 1 to 3, Aluminum alloy: dosed wire, characterized in that tensile strength is 140 MPa or more, elongation is 15% or more, and electrical conductivity is 59 ACS or more.  [Claim 6] ：: The method according to any one of claims 1 to 3, The inevitable impurities may include vanadium (V), chromium (Cr) and nickel (Ni), the content of each of the unavoidable impurities is 0.01% by weight or less, the total content of the inevitable impurities is characterized in that less than 0.1% by weight ， Aluminum alloy conductor wires. [Claim 7] Preparing an aluminum alloy composition comprising iron (Fe) and copper (Cu), the remainder being made of aluminum and inevitable impurities; Adding an Al-Ti-B alloy immediately before casting of the aluminum alloy composition, manufacturing an aluminum alloy wire by continuous casting rolling of the aluminum alloy composition; Drawing the aluminum alloy wire; The method of manufacturing an aluminum alloy conductor wire according to any one of claims 1 to 3, comprising the step of heat-treating the aluminum alloy wire rod after the drawing process.  [Claim 8] The method of claim 7, The method of manufacturing an aluminum alloy conductor wire, further comprising the step of performing degassing and filtration of the foreign matter of the aluminum alloy composition before adding the Al-Ti B alloy.  [Qing Dynasty Port 9] The method of claim 7, The temperature of the continuous casting-rolled aluminum alloy composition is characterized in that the 730 to 90CTC, aluminum alloy conductor wire manufacturing method.  [Claim 10] The method of claim 7, The heat treatment is carried out at 260 to 360 ^° C for 2 to 12 hours, characterized in that the average grain size after the heat treatment is 50 urn or less, manufacturing method of an aluminum alloy conductor wire.