KR20200107536A - High thermal conductivity aluminium alloy enhanced extrusion formability and strength, the manufacturing method thereof and the manufacturing method for Extrusion molding product thereof - Google Patents

Abstract

The present invention provides an aluminum alloy, a manufacturing method thereof, and a manufacturing method of an extrusion-molded product thereof. The present invention improves the strength of an aluminum alloy by adding an alloy element with little effect on thermal conductivity while a dissolution limit is not large, suppresses crystal grain growth by forming a composite phase which is not dissolved in a base, so as to prevent thermal conductivity and electric conductivity from being decreased and thus to improve extrusion formability and strength. The aluminum alloy with improved extrusion formability and strength comprises Zn, Cu, Mg, Ce, La, B, and the remainder consisting of Al and inevitable impurities, wherein Zn, Cu, and Mg are dissolved in Al to form an Al-Zn-Cu-Mg alloy base.

Description

High thermal conductivity aluminum alloy enhanced extrusion formability and strength, the manufacturing method thereof and the manufacturing method for Extrusion molding product thereof }

The present invention relates to an aluminum alloy, and more particularly, a high thermal conductivity aluminum alloy having improved high-temperature deformation characteristics and strength during a high-temperature molding process while minimizing a decrease in thermal conductivity and electrical conductivity, and an aluminum alloy having improved strength. It relates to a method and a method of manufacturing the aluminum alloy extruded product.

In general, heat dissipation parts are core component parts leading to high output, high performance and high integration in eco-friendly automobiles, semiconductors, electric-electronics, LED lighting, and machinery industries. In the case of lightweight heat dissipation materials, it is a core material technology that not only reduces weight but also increases the efficiency of parts and extends the service life by efficiently discharging the generated heat energy.

Among them, the motor housing plays a role of dissipating heat generated from the inside to the outside, and thus has excellent thermal conductivity characteristics, and at the same time, a number of materials development technologies with excellent strength while having sufficient formability and improving cooling performance. Because of the presence of pins, a frame manufacturing process technology having a complex shape is required.

When the motor is operated within the allowable temperature rise, the average lifespan is estimated to be about 30 years. However, if the motor is operated at a higher temperature due to the influence of overload operation or the surrounding environment, the lifespan is reduced by half every 10 degrees. As described above, since the heat dissipation of the heat generated by the motor of the motor is directly related to the life of the motor, various production technologies from heat dissipation design to materials are required. In addition, when using a high heat-dissipating lightweight material that has excellent cooling effects such as thermal conductivity and heat dissipation, it is possible to reduce the size of the motor as well as the weight of the motor, making it possible to realize a compact and lightweight motor.Therefore, the frame materials of the motor described above include thermal conductivity, electrical conductivity, and extrudability. And excellent moldability.

Aluminum can be considered as such a material, but pure aluminum has excellent thermal conductivity characteristics (234 W/m·K), but it has poor formability during the housing manufacturing process, product deformation is easy, and processing is difficult, so it is used for motor housings. It is not used because it is not suitable as a material. Accordingly, cast iron (47W/m·K) or ALDC12 alloy, which is an aluminum alloy for die casting with excellent castability, is used as the motor housing material of the prior art, but has a problem with low heat dissipation characteristics (92W/m·K). .

Accordingly, although Korean Patent Nos. 10-1806714, 10-1502340, and U.S. Patent No. 8936688 disclose aluminum alloys with improved thermal conductivity and workability, aluminum alloys having new processes and compositions and methods for manufacturing the same are disclosed. need.

Korean Patent Registration No. 10-1806714 Korean Patent Registration No. 10-1502340 US registered patent US 8936688

Accordingly, the present invention is to solve the problems of the prior art described above, by adding an alloying element that has a low solubility limit and a low effect on thermal conductivity to improve strength, and to form a composite phase that is not dissolved in a matrix. Provides a high thermal conductivity aluminum alloy with improved extrudability and strength improved extrudability and strength by suppressing crystal grain growth by preventing thermal conductivity and electrical conductivity from decreasing, the aluminum alloy manufacturing method, and the aluminum alloy extruded product manufacturing method Making it a technical task.

In order to achieve the above-described technical problem, an embodiment of the present invention includes Zn, Cu, Mg, Ce, La, B and the balance including Al and other inevitable impurities, and the Zn, Cu and Mg are dissolved in the Al. It provides a high thermal conductivity aluminum alloy with improved extrudability and strength, characterized in that the strength is improved by forming an Al-Zn-Cu-Mg alloy matrix.

The Zn 0.5 ~ 4.0wt%, the Cu 0.25 ~ 2wt%, the Mg 0.1 ~ 1.0wt%, the Ce 0.12 ~ 3wt%, the La 0.06 ~ 1.5wt%, the B contains 0.01 ~ 0.2wt% It is characterized in that the part is Al.

The Ce, La, and Al-Ce, Al-La, Al-Zn-Cu-Ce, Al-Zn-Cu-La by forming one or more composite phases uniformly distributed in the Al alloy matrix, thereby reducing thermal conductivity. It is characterized by improving.

The boron prevents the element that inhibits the electrical conductivity and thermal conductivity from being dissolved in the aluminum matrix by forming an element that inhibits the electrical conductivity and thermal conductivity contained in the aluminum alloy as a boride. It is characterized.

Another embodiment of the present invention to achieve the above-described technical problem, the steps of preparing an aluminum alloy composition comprising Zn, Cu, Mg, Ce, La, B and Al; Dissolving the aluminum alloy composition at a casting temperature of 650 to 800° C. and supplying the alloy melt to a casting machine to prepare an aluminum alloy billet; And heat-treating for 2 to 12 hours in the range of 450 to 600° C. for homogenization of the aluminum alloy billet; including, in the step of preparing the aluminum alloy billet, the Zn, Cu, and Mg are dissolved in the Al to obtain strength It provides a method for producing a high thermal conductivity aluminum alloy with improved extrudability and strength, characterized in that to improve.

In the step of preparing the aluminum alloy composition, the Zn 0.5 ~ 4.0wt%, the Cu 0.25 ~ 2wt%, the Mg 0.1 ~ 1.0wt%, the Ce 0.12 ~ 3wt%, the La 0.06 ~ 1.5wt%, the B Contains 0.01 ~ 0.2wt% and the balance is characterized in that Al.

In the step of manufacturing the aluminum alloy billet, the Ce and La are at least one composite of Al-Ce, Al-La, Al-Zn-Cu-Ce, and Al-Zn-Cu-La uniformly distributed in the Al alloy matrix. It is characterized by improving thermal conductivity by forming a phase.

In the step of manufacturing the aluminum alloy billet, B is an element that inhibits the electrical conductivity and thermal conductivity of the aluminum alloy by forming an element that inhibits the electrical conductivity and thermal conductivity as a boride. It is characterized in that it prevents being employed in the aluminum base.

Another embodiment of the present invention to achieve the above-described technical problem, the steps of preparing an aluminum alloy composition comprising Zn, Cu, Mg, Ce, La, B and Al; Dissolving the aluminum alloy composition at a casting temperature of 650 to 800° C. and supplying the alloy melt to a casting machine to prepare an aluminum alloy billet; Heat-treating for 2 to 12 hours at 450 to 600° C. for homogenization of the aluminum alloy billet; Applying an extrusion process to the heat-treated aluminum alloy billet to prepare an extruded material in the range of 350 to 600°C; And producing an extrusion-molded product by using the extruded material.

In the step of preparing the aluminum alloy composition, the Zn 0.5 ~ 4.0wt%, the Cu 0.25 ~ 2wt%, the Mg 0.1 ~ 1.0wt%, the Ce 0.12 ~ 3wt%, the La 0.06 ~ 1.5wt%, the B Contains 0.01 ~ 0.2wt% and the balance is characterized in that Al.

In the step of manufacturing the aluminum alloy billet, the Ce, La is a composite of at least one of Al-Ce, Al-La, Al-Zn-Cu-Ce, and Al-Zn-Cu-La uniformly distributed in the Al alloy matrix. It is characterized by improving thermal conductivity by forming a phase.

In the step of manufacturing the aluminum alloy billet, B is an element that inhibits the electrical conductivity and thermal conductivity of the aluminum alloy by forming an element that inhibits the electrical conductivity and thermal conductivity as a boride. It is characterized in that it prevents being employed in the aluminum base.

In the above-described aluminum alloy and its manufacturing method according to an embodiment of the present invention, Zn, Cu, and Mg, which are elements having high solubility in Al and having a small effect on thermal conductivity, are dissolved in Al to improve strength, and a trace amount Zn, Cu is a cast iron material used as an electric motor frame material by suppressing the growth of a crystal phase by forming an Al-Zn-Cu-Ce or Al-Zn-Cu-La composite phase, thereby improving thermal and electrical conductivity. Is applied as a lightweight material with a specific gravity of 2.7g/cm ³ or less to achieve a weight reduction of 30% or more, thereby providing the effect of responding to energy and environmental regulations.

In addition, the aluminum alloy and its manufacturing method according to an embodiment of the present invention are produced by applying a lightweight material having high thermal conductivity and multifunctional characteristics of 200W/m·k or more (4 times or more compared to the existing iron-based 47W/m·k). Through the development of processes and parts, it provides the effect of securing source materials and core production process technologies that meet the trend of the new energy industry.

1 is a flow chart of a method of manufacturing a high thermal conductivity aluminum alloy with improved extrudability and strength and a method of manufacturing an extruded product according to an embodiment of the present invention.
Figure 2 is a comparative table of increase in electrical resistivity for each elemental composition of an aluminum alloy according to an embodiment of the present invention.
Figure 3 is an embodiment of the present invention (a) a comparison graph of electrical conductivity and thermal conductivity by composition of an aluminum alloy and (b) a comparison table of electrical conductivity and thermal conductivity by aluminum alloy composition.
4 is a graph of comparison of (a) extrusion pressure and tensile strength by composition of an aluminum alloy according to an embodiment of the present invention, and (b) a comparison table of tensile strength, elongation and extrusion pressure.
Figure 5 is an electron microscope photograph of the composition of the aluminum alloy according to an embodiment of the present invention.
6 is a comparison graph of (a) electrical conductivity and (b) electrical conductivity and thermal conductivity by composition of an aluminum alloy according to an embodiment of the present invention.
7 is a table of measurement results of electrical conductivity, thermal conductivity, tensile strength and extrusion pressure by composition of an aluminum alloy according to an embodiment of the present invention.
8 is a (a) extrusion process diagram, (b) side view, and (c) plan view of an extruded product of an electric motor housing according to an embodiment of the present invention.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Since the embodiments according to the concept of the present invention can apply various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the present specification or application. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific form of disclosure, and the present invention should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle. Other expressions describing the relationship between components, such as "between" and "just between" or "adjacent to" and "directly adjacent to" should be interpreted as well.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of a set feature, number, step, action, component, part, or combination thereof, but one or more other features or numbers It is to be understood that the possibility of addition or presence of, steps, actions, components, parts, or combinations thereof is not preliminarily excluded.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing embodiments of the present invention.

1 is a flow chart of a method of manufacturing a high thermal conductivity aluminum alloy with improved extrudability and strength and a method of manufacturing an extrusion molded product according to an embodiment of the present invention.

As shown in Figure 1, the method of manufacturing an extruded product made of an aluminum alloy according to an embodiment of the present invention includes: preparing an aluminum alloy composition (S10), preparing an aluminum alloy billet (S20), and performing heat treatment (S30), Consisting of including the step of manufacturing an extruded material (S40) and manufacturing an extruded product (S50), and the method of manufacturing an aluminum alloy includes a step of preparing an aluminum alloy composition (S10), a step of preparing an aluminum alloy billet ( S20) and a heat treatment step (S30).

In the step (S10) of preparing the aluminum alloy composition, an aluminum alloy composition including Zn, Cu, Mg, Ce, La, B and Al is prepared.

In the step of manufacturing the aluminum alloy billet (S20), the aluminum alloy composition is dissolved at a casting temperature of 650 to 800° C. and the alloy melt is supplied to a casting machine to prepare an aluminum alloy billet.

In the step (S20) of manufacturing the aluminum alloy billet, the Zn, Cu, and Mg are dissolved in Al to improve the strength of the aluminum alloy while minimizing a decrease in electrical and thermal conductivity.

In addition, in the step of manufacturing the aluminum alloy billet (S20), the Ce and La are Al-Ce, Al-La, Al-Zn-Cu-Ce, Al-Zn-Cu- uniformly distributed in the Al alloy matrix. By forming one or more composite phases of La, the growth of the crystal phase of the aluminum alloy is suppressed to improve electrical conductivity and thermal conductivity, thereby forming an aluminum alloy having high thermal conductivity.

In addition, the boron (B) is an element that inhibits the electrical conductivity and thermal conductivity by forming an element that inhibits the electrical conductivity and thermal conductivity contained in the aluminum alloy as a boride (Cr, Ti, V, Zr, etc.) is added as Al-B to prevent solid solution in the aluminum matrix.

In the heat treatment step (S30), heat treatment is performed for 2 to 12 hours at 450 to 600° C. for homogenization of the aluminum alloy billet.

An extrusion process is applied to the heat-treated aluminum alloy billet to prepare an extruded material in the range of 350 to 600°C .

The step of preparing the aluminum alloy composition as described above (S10), the step of preparing an aluminum alloy billet (S20), the step of heat treatment (S30), and the step of extruding (S40) are the aluminum alloy manufacturing method of the embodiment of the present invention. Configure.

Next, the characteristics of the aluminum alloy manufactured by the aluminum alloy manufacturing method of the embodiment of the present invention described above will be described.

FIG. 2 is a table showing an increase in electrical resistivity according to elemental composition of an aluminum alloy according to an embodiment of the present invention, and FIG. 3 is a comparison graph of electrical conductivity and thermal conductivity by composition of the aluminum alloy (a) and (b) of an embodiment of the present invention. ) It is a comparison table of electrical conductivity and thermal conductivity by aluminum alloy composition, and FIG. 4 is a comparison table of (a) extrusion pressure and tensile strength comparison graph and (b) tensile strength, elongation and extrusion pressure by composition of an aluminum alloy according to an embodiment of the present invention. .

As shown in FIG. 2, each of Cu, Mg, and Zn has a high solubility of 5.65 wt%, 14.9 wt%, and 82.8 wt% in Al, while the average electrical resistivity per wt% (μΩ·cm) increase rate is the solubility limit It can be seen that there is little effect on the electrical resistivity of 0.344 μΩ·cm, 0.51 μΩ·cm, and 0.094 μΩ·cm in the inside, and 0.030 μΩ·cm, 0.22 μΩ·cm and 0.023 μΩ·cm when the solid solution limit is exceeded.

And, as shown in Figure 3, the Cu, Mg and Zn formed by solid solution in Al metal Al-2Zn-1Cu, Al-2Zn-1Cu-0.1Mg, Al-2Zn-1Cu-0.3Mg, Al-2Zn-1Cu-0.5 The electrical conductivity of each of Mg and Al-2Zn-1Cu-0.7Mg is 52.93%IACS, 51.46%IACS%IACS, 49.93%IACS, 47.49%IACS and 46.79%IACS after casting (As-cast), and heat treatment by heat treatment. After homogenization, they are 52.24%IACS, 50.81%IACS, 48.86%IACS, 46.70%IACS and 46.05%IACS, and 52.24%IACS, 50.81%IACS, 48.86%IACS, 46.70%IACS after extruded material (Extrusion). And 46.05% IACS, and the thermal conductivity of the extruded material was 208.577 W/mk, 204.722 W/mk, 197.821 W/mk, 192.388 W/mk, and 187.029 W/mk.

And, as shown in Figure 4, a comparative example of a conventional aluminum alloy A6063, Al-2Zn-1Cu, Al-2Zn-1Cu-0.1Mg, Al-2Zn-1Cu-0.3Mg, Al- formed by solid solution of Cu, Mg and Zn. Tensile strengths of 2Zn-1Cu-0.5Mg and Al-2Zn-1Cu-0.7Mg were 118.12 MPa, 101.86 MPa, 117.35 MPa, 192.75 MPa, 195.23 MPa and 203.55 MPa.

In addition, the comparative example of the conventional aluminum alloy A6063, Al-2Zn-1Cu, Al-2Zn-1Cu-0.1Mg, Al-2Zn-1Cu-0.3Mg, Al-2Zn-1Cu formed by solid solution of Cu, Mg, and Zn Elongation of -0.5Mg and Al-2Zn-1Cu-0.7Mg were 31.51%, 31.93%, 29.21%, 32.58%, 32.19% and 32.45%, respectively.

And the comparative example of the conventional aluminum alloy A6063, Al-2Zn-1Cu, Al-2Zn-1Cu-0.1Mg, Al-2Zn-1Cu-0.3Mg, Al-2Zn-1Cu- formed by solid solution of the Cu, Mg and Zn. Extrusion pressures of 0.5Mg and Al-2Zn-1Cu-0.7Mg were 133.17 kgf, 91.5 kgf, 99.9 kgf, 106.9 kgf, 110.8 kgf and 127.0 kgf, respectively.

That is, as can be seen in FIGS. 2 to 4 described above, when the Cu, Mg and Zn are dissolved in Al, the effect on the electrical and thermal conductivity is small, so that the electrical and thermal conductivity of the resulting aluminum alloy is reduced. It can be seen that the strength is improved while minimizing.

Referring again to FIG. 1, when manufacturing an extruded product such as an electric motor housing using the aluminum alloy of the embodiment of the present invention manufactured by the above-described processing process, the thermal conductivity and moldability of the extruded product are improved. Light weight can be achieved.

When explaining a method of manufacturing an extruded product according to an embodiment of the present invention, specifically, an extruded material is manufactured by applying an extrusion process to the heat-treated aluminum alloy billet in the step of manufacturing the extruded material (S40).

5 is an electron microscope photograph of the composition of the aluminum alloy according to an embodiment of the present invention, and FIG. 6 is a comparison graph of (a) electrical conductivity and (b) electrical conductivity and thermal conductivity comparison table by composition of the aluminum alloy according to an embodiment of the present invention. to be.

As shown in FIG. 5, in the step (S20) of manufacturing the aluminum alloy billet, Al-Ce, Al-La, Al-Zn-Cu-Ce, Al-Zn-Cu-La uniformly distributed in the Al alloy matrix. It can be seen that at least one of the composite phases is uniformly distributed and formed.

And Al-2Zn-1Cu-0.5Mg base, Al-2Zn-1Cu-0.5Mg-2AlB, the Al-Zn-Cu-Mg-(Ce, La, B) composite phase (Al-2Zn-1Cu-0.5Mg- Electrical conductivity of 0.5M (M is one of Ce, La or B) and Al-2Zn-1Cu-0.5Mg-10AlTiB alloy after casting (As-cast), after homogenization (Homogenization), and after extrusion (Extrusion) Comparing the thermal conductivity, as in FIG. 6, the Al-2Zn-1Cu-0.5Mg-2AlB, the Al-Zn-Cu-Mg-(Ce, La, B) composite phase (Al-2Zn-1Cu-0.5 The electrical conductivity of Mg-0.5M (M is one of Ce, La or B) and Al-2Zn-1Cu-0.5Mg-10AlTiB alloys after casting (As-cast) is 47.49%IACS, 49.60%IACS, 48.01%, respectively. IACS and 41.61% IACS.

And the Al-2Zn-1Cu-0.5Mg-2AlB, the Al-Zn-Cu-Mg-(Ce, La, B) composite phase (Al-2Zn-1Cu-0.5Mg-0.5M (M is Ce, La or B) and the electrical conductivity of the Al-2Zn-1Cu-0.5Mg-10AlTiB alloy after homogenization were 46.70%IACS, 48.57%IACS, 47.71%IACS and 41.94%IACS, respectively.

In addition, the Al-2Zn-1Cu-0.5Mg-2AlB, the Al-Zn-Cu-Mg-(Ce, La, B) composite phase (Al-2Zn-1Cu-0.5Mg-0.5M (M is Ce, La Or B) and Al-2Zn-1Cu-0.5Mg-10AlTiB alloys were 48.26%IACS, 49.52%IACS, 49.10%IACS and 42.68%IACS, respectively.

The Al-2Zn-1Cu-0.5Mg-2AlB, the Al-Zn-Cu-Mg-(Ce, La, B) composite phase (Al-2Zn-1Cu-0.5Mg-0.5M (M is Ce, La or B One) and the thermal conductivity of the Al-2Zn-1Cu-0.5Mg-10AlTiB alloy after extrusion (Extrusion) was 192.388 W/mk, 197.013 W/mk, 195.472 and 171.904 W/mk.

That is, the aluminum alloy of the embodiment of the present invention increases the extrusion strength, as shown in FIG. 4, while suppressing the growth of the crystal phase by forming the Al-Zn-Cu-Mg-(Ce, La, B) composite phase. It was confirmed that the conductivity and thermal conductivity were improved.

7 is a table comparing electrical conductivity, thermal conductivity, tensile strength and extrusion pressure of aluminum alloys of Examples and Comparative Examples of the present invention. In FIG. 7, in the case of the aluminum alloys of Examples 1 to 6 of the present invention, it was confirmed that the decrease in electrical conductivity and thermal conductivity was minimized, and tensile strength and extrusion pressure were improved.

Next, as shown in FIG. 1 again, in the step (S50) of producing the extrusion-molded product, the extruded material is applied to the extrusion molding machine 20 and extruded to produce an extrusion-molded product. 8 is a (a) extrusion process diagram, (b) a side view, and (c) a plan view of an extruded product of an electric motor housing according to an embodiment of the present invention.

In FIG. 8, reference numeral 20 denotes an extrusion molding machine and 10 denotes an electric motor housing.

Although the technical idea of the present invention described above has been described in detail in the preferred embodiment, it should be noted that the embodiment is for the purpose of description and not for the limitation thereof. In addition, those of ordinary skill in the technical field of the present invention will be able to understand that various embodiments are possible within the scope of the technical idea of the present invention. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: motor housing
20: extrusion molding machine

Claims (12)

Zn, Cu, Mg, Ce, La, B and the remainder contain Al and other inevitable impurities, and the Zn, Cu, and Mg improve strength by being dissolved in the Al. Advanced high thermal conductivity aluminum alloy. The method of claim 1, wherein the Zn 0.5 ~ 4.0wt%, the Cu 0.25 ~ 2wt%, the Mg 0.1 ~ 1.0wt%, the Ce 0.12 ~ 3wt%, the La 0.06 ~ 1.5wt%, the B is 0.01 ~ 0.2 High thermal conductivity aluminum alloy with improved extrudability and strength, characterized in that it contains wt% and the balance is Al. The method of claim 1, wherein Ce, La is,
Characterized in that the thermal conductivity is improved by forming at least one composite phase among Al-Ce, Al-La, Al-Zn-Cu-Ce, and Al-Zn-Cu-La uniformly distributed in the Al alloy matrix. High thermal conductivity aluminum alloy with improved extrudability and strength. The method of claim 3, wherein the boron,
Extrusion, characterized in that the element that inhibits the electrical conductivity and thermal conductivity contained in the aluminum alloy is formed as a boride to prevent the element that inhibits the electrical conductivity and thermal conductivity from being dissolved in the aluminum matrix High thermal conductivity aluminum alloy with improved properties and strength. Preparing an aluminum alloy composition comprising Zn, Cu, Mg, Ce, La, B and Al;
Dissolving the aluminum alloy composition at a casting temperature of 650 to 800° C. and supplying the alloy melt to a casting machine to prepare an aluminum alloy billet;
Heat-treating for 2 to 12 hours at 450 to 600° C. for homogenization of the aluminum alloy billet; And
Including; applying an extrusion process to the heat-treated aluminum alloy billet to prepare an extruded material in the range of 350 to 600 ℃, including,
In the step of manufacturing the aluminum alloy billet, the Zn, Cu, and Mg are dissolved in the Al to improve the strength of the high thermal conductivity aluminum alloy manufacturing method with improved extrudability and strength. The method of claim 5, wherein in the step of preparing the aluminum alloy composition,
The Zn 0.5 ~ 4.0wt%, the Cu 0.25 ~ 2wt%, the Mg 0.1 ~ 1.0wt%, the Ce 0.12 ~ 3wt%, the La 0.06 ~ 1.5wt%, the B contains 0.01 ~ 0.2wt% A method for producing a high thermal conductivity aluminum alloy with improved extrudability and strength, characterized in that the part is Al. The method of claim 5, wherein in the manufacturing of the aluminum alloy billet,
The Ce and La form one or more of Al-Ce, Al-La, Al-Zn-Cu-Ce, and Al-Zn-Cu-La uniformly distributed in the Al alloy matrix to suppress the growth of the crystal phase. A method of manufacturing a high thermal conductivity aluminum alloy having improved extrudability and strength, characterized by improving thermal conductivity and electrical conductivity. The method of claim 5, wherein in the manufacturing of the aluminum alloy billet,
The B is characterized in that an element that inhibits electrical conductivity and thermal conductivity contained in the aluminum alloy is formed as a boride to prevent the element that inhibits the electrical conductivity and thermal conductivity from being dissolved in the aluminum matrix. High thermal conductivity aluminum alloy manufacturing method with improved extrudability and strength. Preparing an aluminum alloy composition comprising Zn, Cu, Mg, Ce, La, B and Al;
Dissolving the aluminum alloy composition at a casting temperature of 650 to 800° C. and supplying the alloy melt to a casting machine to prepare an aluminum alloy billet;
Heat-treating for 2 to 12 hours at 450 to 600° C. for homogenization of the aluminum alloy billet;
Applying an extrusion process to the heat-treated aluminum alloy billet to prepare an extruded material in the range of 350 to 600°C; And
The method of producing an extrusion-molded product, comprising: producing an extrusion-molded product using the extruded material. The method of claim 9, wherein the Zn 0.5 ~ 4.0wt%, the Cu 0.25 ~ 2wt%, the Mg 0.1 ~ 1.0wt%, the Ce 0.12 ~ 3wt%, the La 0.06 ~ 1.5wt%, the B is 0.01 ~ 0.2 A method of manufacturing an extrusion molded article, characterized in that it contains wt% and the balance is Al. The method of claim 9, wherein in the step of preparing the aluminum alloy billet,
The Ce and La are,
Thermal conductivity and electrical conductivity by inhibiting the growth of crystal phase by forming one or more complex phases among Al-Ce, Al-La, Al-Zn-Cu-Ce, and Al-Zn-Cu-La uniformly distributed in the Al alloy matrix Method for producing an extrusion molded product, characterized in that to improve. The method of claim 9, wherein in the step of preparing the aluminum alloy billet,
The B is characterized in that an element that inhibits electrical conductivity and thermal conductivity contained in the aluminum alloy is formed as a boride to prevent the element that inhibits the electrical conductivity and thermal conductivity from being dissolved in the aluminum matrix. Extrusion molded product manufacturing method.

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