KR20180078565A - High strength aluminum alloy and method of fabricating the same - Google Patents

Abstract

The present invention relates to aluminum alloy having high strength, and a manufacturing method thereof. The aluminum alloy according to one embodiment of the present invention comprises: an aluminum matrix; and a precipitation compound dispersed in the aluminum matrix. The precipitation compound includes: a compound of aluminum-at least one transition metal-at least one non-metallic element; a compound formed by having the constituent elements.

Description

TECHNICAL FIELD [0001] The present invention relates to a high strength aluminum alloy and a manufacturing method thereof,

The present invention relates to an aluminum alloy, and more particularly, to a high strength aluminum alloy and a method of manufacturing the same.

In general, aluminum or its alloy is a material having a wide range of industrial applications because it can be manufactured in various shapes using light and durable characteristics of aluminum. Aluminum itself is easily deformed due to its low strength, but aluminum alloy has high strength and high reliability to the extent that it can be applied to the automobile or aircraft industry by the added elements. In recent years, due to its excellent mechanical strength and low weight, the aluminum alloy has been applied to various fields such as automobiles and aircraft, as well as various fields such as architecture, chemistry, robots and electronic products.

Generally, since the strength of pure aluminum itself is low, alloying elements such as silicon (Si), magnesium (Mg), copper (Cu), manganese (Mn), or zinc (Zn) The strengthening of the solid solution of the added element or the precipitation strengthening of the compound or the second phase is intended to improve the strength. The aluminum alloy may be classified into a non-heat-treated alloy and a heat-treated alloy depending on whether it is cured by heat treatment or not. The aforementioned non-heating alloy is improved in strength by strengthening by a second phase or a compound by an element such as silicon, magnesium or manganese, as described above. Examples of the non-heat-treated alloy include Al-Si alloys, Al-Mg alloys, and Al-Mn alloys.

The strength of the heat-treated alloy may be determined depending on the kind of the alloy element. For example, the aluminum alloy to which copper (Cu) or zinc (Zn) is added increases the solubility of the additive element as the temperature rises, and can be cured by the formation of precipitates by aging treatment. The heat-treated alloys include Al-Cu alloys, Al-Zn alloys, and Al-Mg-Si alloys. However, in the case of the above-mentioned heat-treated alloy, since its main constitution or brittleness must be considered, there is a restriction on the element of the alloy to be added. Aluminum alloys, which are strengthened by the formation of precipitates, such as intermetallic compounds, by adding a dissimilar metal element to aluminum, can be expected to provide an additional strength improvement over conventional heat treated alloys.

An object of the present invention is to provide an aluminum alloy capable of improving the strength of an aluminum alloy by forming a new reactive compound in an aluminum alloy through heat treatment to provide an efficient strengthening mechanism of the aluminum alloy.

Another problem to be solved by the present invention is to provide a method of manufacturing an aluminum alloy which can easily produce an aluminum alloy having the above advantages.

According to an aspect of the present invention, there is provided an aluminum alloy including: an aluminum base; And an precipitated compound dispersed in the aluminum matrix. The precipitation compound may include a compound containing aluminum, at least one transition metal element, and at least one nonmetallic element, or a compound formed by including the constituent elements.

In one embodiment, the average size of the precipitated compound may be in the range of 10 nm to 1 占 퐉. The transition metal element may include at least one of chromium (Cr), iron (Fe), and manganese (Mn).

The non-metallic element may be supersaturated in the aluminum alloy and may include at least one of oxygen, nitrogen, and carbon. The precipitated compound can be produced by heat treatment.

The aluminum-based matrix is an aluminum alloy, and the alloy element of the aluminum alloy may include at least one of silicon (Si), zinc (Zn), magnesium (Mg), and copper (Cu). Further, in one embodiment, the aluminum alloy can be work-hardened by firing.

According to another aspect of the present invention, there is provided a method of manufacturing an aluminum alloy, the method including: providing a molten aluminum alloy including aluminum and a first transition metal; A first reaction compound between the first transition metal and the nonmetal element, a second reaction compound between the first transition metal and a second transition metal different from the first transition metal, and a second reaction compound between the nonmetal element and the nonmetal element, Adding a non-metallic element-containing precursor containing at least one of the third reaction compounds; Decomposing the non-metallic element-containing precursor in the molten metal to supersatethe non-metallic element in the molten metal; Solidifying the molten metal to form a casting material; And heat treating the solidified cast material to form a precipitated compound between aluminum, a transition metal element and a nonmetal element dispersed in the aluminum matrix.

The first transition metal element may include at least one of chromium (Cr), iron (Fe), and manganese (Mn). The non-metallic element may include at least one of oxygen, nitrogen, and carbon.

In one embodiment, the bivalent metal element of the third reaction compound may include at least one of aluminum (Al), silicon (Si), magnesium (Mg), and tungsten (W). The non-metallic element-containing precursor may be added to the melt in the form of powder having an average diameter within the range of 5 nm to 50 nm.

The non-metallic element-containing precursor may be added in the range of 0.01 wt% to 5.0 wt% based on the total weight of the molten metal. Further, before the solidified casting material is heat-treated, the step of calcining and solidifying the solidified casting material may be further performed. The heat treatment may be performed within a range of 120 ° C to 600 ° C.

According to an embodiment of the present invention, there is provided a method for producing a metal-based alloy, comprising the steps of: depositing a compound composed of an aluminum-transition metal-nonmetal element or a compound including these elements in an aluminum base by heat treatment, The precipitation compound strongly interacts with the dislocation, so that an aluminum alloy in which the strength of the aluminum alloy is remarkably improved can be provided.

According to another embodiment of the present invention, a method of manufacturing an aluminum alloy capable of reliably manufacturing an aluminum alloy having the above advantages can be provided.

1 is a flowchart illustrating a method of manufacturing an aluminum alloy according to an embodiment of the present invention.
FIGS. 2A and 2B are transmission electron microscope images showing precipitation compounds in an aluminum matrix by heat treatment according to an embodiment of the present invention. FIG. 2C is a graph showing the results of energy dispersive X-ray spectroscopy (EDS) FIG. 3 is a graph showing the components of the precipitation compound analyzed by the method of FIG.
Fig. 3 is an SEM image of a cross-sectional microstructure of an aluminum alloy cast material in which a non-metallic element is supersaturated according to a comparative example before heat treatment.
4 is a graph showing the measurement results of the tensile strength of an aluminum alloy according to an embodiment of the present invention and an aluminum alloy according to a comparative example.
5A and 5B are graphs showing tensile strength and degree of strength increase of aluminum alloys according to various compositions of the precipitation compound according to an embodiment of the present invention, respectively.
6 is a graph showing the measurement results of tensile strength of an aluminum alloy containing a precipitation compound and an aluminum alloy according to a comparative example according to still another embodiment of the present invention.
FIG. 7 is a graph showing the measurement results of tensile strength of an aluminum alloy containing a precipitation compound and an aluminum alloy according to a comparative example according to another embodiment of the present invention. FIG.

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

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more faithful and complete, and will fully convey the scope of the invention to those skilled in the art.

In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of description, and the same reference numerals refer to the same elements in the drawings. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

The aluminum alloy according to the embodiment of the present invention has a structure in which a precipitated compound is dispersed in an aluminum alloy matrix. The precipitation compound means a compound that can be formed by including aluminum, a transition metal element, a non-metal element, and these constituent elements. The aluminum base refers to a base formed of pure aluminum or a conventional aluminum alloy. The aluminum alloy may be manufactured using a casting process described below.

1 is a flowchart illustrating a method of manufacturing an aluminum alloy according to an embodiment of the present invention.

Referring to FIG. 1, in one embodiment of the present invention, a molten aluminum alloy may be provided (S10). The molten metal may be provided by heating an aluminum alloy using an electric melting furnace. The heating temperature of the molten metal may be in the range of 650 ° C to 850 ° C. The heating temperature of the molten metal is illustrative and an appropriate temperature can be determined according to the composition of the aluminum alloy and / or the impurity in the aluminum alloy in the molten metal, and the present invention is not limited thereto.

The aluminum alloy may include any alloy element that can be employed in aluminum. In one embodiment, the alloying element may comprise a transition metal. For example, the transition metal may be at least one selected from the group consisting of Sc, Y, Ti, Zr, V, Cr, Mn, (Ni), copper (Cu), silver (Ag), zinc (Zn), or at least two or more of them. In one embodiment, the transition metal may include at least one of chromium (Cr), iron (Fe), and manganese (Mn), preferably elements of Group 6 to Group 8 of the periodic table. have. In another embodiment, the alloy element may be formed of a metal such as silicon (Si), magnesium (Mg), tungsten (W), calcium (Ca), strontium (Sr), beryllium (Be) The bichon may further include a metallic element. Further, the aluminum alloy may be a base alloy containing the transition metal. For example, as the above-mentioned base alloy, A356 alloy containing Fe at 0.2 to 0.3 weight ratio or A6061 alloy containing 0.5 to 0.7 weight ratio of Fe is present.

In this specification, a transition metal of a kind actually included in the aluminum alloy as a starting material provided in the form of molten metal among the above-described transition metals is referred to as a first transition metal, and the transition metal, which is not included in the aluminum alloy, Metal and other types of transition metals are sometimes referred to as second transition metals. For example, in the case where chromium (Cr), iron (Fe), and manganese (Mn), which are transition metals, are contained as the alloy element in the molten aluminum as the starting material, in the present specification, Cr), iron (Fe) and manganese (Mn) may be referred to as first transition metals. In one embodiment, at least one of the first transition metals and a powder of a compound of a nonmetal element are added to the molten aluminum in the molten aluminum preliminarily containing the first transition metals, from which a casting material is formed, A three-element precipitation compound containing at least one of the first transition metals may be formed in the aluminum-based matrix through the heat treatment. In another embodiment, since the first transition metal is preliminarily contained in the molten aluminum, a powder of a compound of a non-transition metal and a non-metal element is added to the molten aluminum to form a cast material, A three-element precipitation compound containing aluminum, a first transition metal and a nonmetallic element can be formed in the matrix.

In another embodiment, if the molten aluminum contains only chromium (Cr) and iron (Fe) and no manganese (Mn) is present, the first transition metal is chromium (Cr) and iron (Fe) Manganese (Mn) not contained in the molten aluminum may be referred to as a second transition metal. As described later, the second transition metal is obtained by adding the powder of the compound of the second transition metal and the non-metal element in the aluminum molten metal to form a cast material, and then the first transition metal and the non- And a transition metal compound having at least one transition metal atom.

In another embodiment, there is no transition metal present in the molten aluminum, wherein a powder of the compound of the second transition metal and the non-metal element is added to the molten aluminum to form a cast material, A third precursor compound containing the second transition metal may be formed in the aluminum matrix.

A non-metallic element-containing precursor containing at least one of oxygen (O), nitrogen (N) and carbon (C) may be added and mixed in the molten aluminum (S20). Thereafter, the added non-metallic element-containing precursor is decomposed in the molten metal so that the non-metallic element can be supersaturated in the molten metal (S30). The nonmetal element-containing precursor is a compound which is a compound between the first transition metal and the nonmetal element, the second transition metal which is a transition metal different from the first transition metal and the nonmetal element Or a second reactive compound. In another embodiment, the non-metallic element-containing precursor may be a third reaction compound which is a compound between the non-metallic element and the non-metallic element.

In one embodiment, when zinc (Zn), which is a first transition metal, is present as an aluminum alloy element in the molten aluminum, the first reactive compound may be, for example, a second transition metal such as chromium (CrO ₂ ), and a nonmetal containing precursor comprising the first reactive compound may be added to the molten aluminum. As another example, the non-metallic element-containing precursor may include a third reaction compound such as silicon oxide (SiO ₂ ) containing a non-transition metal element such as silicon. When the first transition metal already exists in the aluminum molten metal, the third reaction compound is used as the non-metal element-containing precursor to form a three-element precipitation compound of aluminum, a first transition metal and a non- May be formed.

When the transition metal such as zinc, titanium, copper, and iron is not contained in the molten metal as the alloying element, the nonmetal-containing precursor is a second reaction compound which is a compound of the second transition metal and the nonmetal element, ZnO), titanium oxide (TiO _2), copper oxide (CuO _2), iron oxide (Fe ₂ O _3), copper nitride (CuN), iron nitride (FeN), zinc nitride (ZnN), titanium nitride (TiN), A non-metal containing precursor comprising magnesium nitride (MgN) or a mixture thereof may be added to the aluminum melt. These are only exemplary, and the present invention is not limited thereto.

In another embodiment, the non-metallic element-containing precursor may be a third reaction compound between a non-transition metal element and a non-metallic element that is not a transition metal. For example, the third reaction compound may include aluminum oxide (Al), magnesium (Mg), silicon (Si), or tungsten (W), which is a reaction element between the non- Al ₂ O ₃ , aluminum nitride (AlN), magnesium oxide (MgO ₂ ), silicon oxide (SiO ₂ ), silicon carbide (SiC), silicon nitride (Si ₃ N ₄ ), tungsten oxide (WO), tungsten oxide WN) or a mixture thereof, which is merely an example, and the present invention is not limited thereto. Also, the first to third reaction compounds, which are the non-metallic element-containing precursors, may be added singly or in combination of at least two or more of them to the molten metal.

In one embodiment, the non-metallic element-containing precursor can be provided in powder form so that the specific surface area is large and easily decomposed at high temperature. For example, the non-metallic element-containing precursor may have an average diameter within the range of 5 nm to 50 nm. When the thickness is 50 nm or more, the decomposition of the non-metal element-containing precursor is difficult, and formation of a precipitation compound to be described later may be difficult. The first reaction compound and the second reaction compound described above may be added to the molten metal alone or in combination with each other.

In one embodiment, the non-metallic element-containing precursor may be mixed in a range of 0.01 wt% to 5.0 wt% based on the total weight of the molten metal. If the mixing amount of the non-metallic element-containing precursor is less than 0.01% by weight, it is difficult for the non-metallic element to be supersaturated in the molten aluminum alloy. On the contrary, if the mixing amount exceeds 5.0% by weight, It is difficult to form a precipitation compound having a uniform composition between nonmetal elements, and when an excessive amount of nonmetal element-containing precursor is present in the molten metal, a reaction compound between the transition metal and the nonmetal element or a reaction compound between aluminum and the non- The generation of the same second phase can be promoted. The non-metallic element can be mixed over the solubility limit so that supersaturation relative to the aluminum of the aluminum base can be performed at room temperature within the composition range of the non-metallic element-containing precursor.

The non-metallic elements are uniformly mixed and the supersaturated molten metal is solidified to form a casting material (S40). The solidifying of the molten metal can be achieved by cooling the molten metal.

Thereafter, the solidified cast material is subjected to heat treatment to precipitate a ternary reaction compound between the aluminum-transition metal element and non-metal elements, thereby forming a precipitated compound uniformly dispersed in the aluminum-based matrix (S50). The transition metal element of the tertiary reaction compound may include at least one kind of cesium metal element. For example, it may be an aluminum-zinc-oxygen interfacial ternary reaction compound, or may contain iron, chromium, scandium, manganese or two or more metal elements which are other transition metals besides or in addition to the zinc. These compounds are illustrative, and the present invention is not limited thereto. The non-metallic element of the tertiary reactive compound may also include at least one non-metallic element. For example, it may be an aluminum-zinc-oxygen interstitial tertiary reaction compound, or may contain nitrogen, carbon or both, which are other non-metallic elements in addition to or in addition to the oxygen which is a non-metallic element.

The precipitation compound is nano-sized crystal grains and can have an average size of 10 nm to 1 vm, as will be understood from the description of Fig. 4 to be described later. When the size of the precipitated compound is less than 10 nm, it does not have a strong interaction with the dislocations formed in the aluminum alloy and does not contribute to the improvement of the strength. When the size exceeds 1 vm, the precipitation compound has a brittleness and does not contribute to the improvement of the strength.

 The precipitation compound, which is a tertiary reaction compound, is formed stably in the aluminum matrix through heat treatment, rather than being formed in the cooling process for solidification as described later. As a result, according to the embodiment of the present invention, the precipitation compound can be uniformly formed in the aluminum matrix without segregation or coagulation phenomenon as compared with the non-heating alloy.

The heat treatment may be performed within a range of 120 ° C to 600 ° C. If the temperature is lower than 120 ° C, precipitation of the reactive compound may not occur. If the temperature exceeds 600 ° C, the aluminum-based substrate is melted and even if the precipitated compound is produced, the aluminum alloy structure is not uniformly dispersed.

In one embodiment, the heat treatment may comprise a single or at least two heating steps. For example, the solidified product can be heat treated at 540 占 폚 for 12 hours and at 160 占 폚 for 8 hours. The above temperature range and time are illustrative and can be appropriately selected under the condition that aggregation and segregation of the precipitation compound do not occur.

In one embodiment, the casting material may be further subjected to plastic working and work hardening before the heat treatment (S45). The above-described processing may be performed through plastic deformation such as rolling, extrusion, drawing, or forging. The plastic working may be a hot process or a cold process, and the present invention is not limited thereto. For example, the plastic working may be artificially aged without cold working after solution treatment. The above-mentioned precipitation compound is additionally formed in the aluminum matrix through the above-mentioned plastic working or the precipitation compound has a strong interaction with the dislocation-induced dislocation, so that the strength of the aluminum alloy can be further improved.

The following examples relate to specific experimental examples, but are not intended to limit the present invention, but are representative examples for illustrative purposes. From the electrical, chemical, and physical properties that transition metals have in common, Are also included in the present invention.

Experimental Example

An aluminum alloy (for example, A356 alloy) containing silicon and silicon as a first transition metal is melted by using an electric heating furnace to form a molten metal. Thereafter, zinc oxide particles or powder having a mean particle size within the range of 5 nm to 50 nm of 30 nm were added as the nonmetallic element-containing precursor to the melt and decomposed. The zinc oxide particles were charged and stirred by about 1 wt% or 1.5 wt%, which was in the range of 0.01 wt% to 5.0 wt% based on the total weight percent of the molten metal. A nonmetallic element was supersaturated in the molten aluminum alloy and solidified as it was to form a cast material of an aluminum alloy in which oxygen as a nonmetal element was supersaturated. Thereafter, the cast material was subjected to a standard T6 heat treatment.

FIGS. 2A and 2B are transmission electron microscope images showing precipitation compounds in an aluminum matrix by heat treatment according to an embodiment of the present invention. FIG. 2C is a graph showing the results of energy dispersive X-ray spectroscopy (EDS) FIG. 3 is a graph showing the components of the precipitation compound analyzed by the method of FIG. Fig. 3 is an SEM image of a cross-sectional microstructure of a non-metallic element-superimposed aluminum alloy cast material before heat treatment according to a comparative example.

The aluminum alloy shown in Figs. 2A and 2B was prepared by casting aluminum alloy castings formed by adding ZnO precursor by about 1.5 wt.% In accordance with an embodiment of the present invention, at 540 占 폚 for 12 hours, at 160 占 폚 for 8 hours at T6 And is an aluminum alloy in which a precipitation compound is formed after the heat treatment. In order to observe the deformation behavior of the aluminum alloy containing the precipitated compound, the aluminum alloy was subjected to tensile deformation of about 15% and then observed with a transmission electron microscope. It can be confirmed that the precipitation compound (NP) according to the embodiment of the present invention strongly interacts with the dislocation (DL).

Referring to FIG. 2C, it can be seen that the precipitation compound is composed of three kinds of elements, aluminum-iron-oxygen. At this time, silicon is a component derived from an aluminum alloy existing in the molten metal and is independent of the composition of the precipitated compound. The precipitation compound is a novel reaction compound between aluminum-transition metal and nonmetal elements which is not precipitated from a conventional aluminum alloy. It forms a very favorable interface with an aluminum base and can strongly interact with the electric potential in the aluminum base, .

Referring to Fig. 3, the light needle-shaped structure is a silicon phase in the aluminum alloy, and the dark region is an aluminum base. Since the aluminum casting material was not subjected to the heat treatment step, the precipitation compound according to the embodiment of the present invention having a size observable within the aluminum matrix was not observed.

4 is a graph showing the measurement results of the tensile strength of an aluminum alloy according to an embodiment of the present invention and an aluminum alloy according to a comparative example.

Referring to FIG. 4, an aluminum alloy according to an embodiment of the present invention is prepared by adding a precursor powder of ZnO to a molten metal of A356 alloy to form a cast material, followed by heat treatment. The aluminum alloy of the comparative example is manufactured by forming a cast material without adding the precursor powder to the molten aluminum and heat-treating it under the same conditions. It can be seen that the tensile strength of the aluminum alloy according to the embodiment of the present invention (solid line curve) is improved to about 35% or more as compared with the aluminum alloy according to the comparative example (dotted line curve).

5A and 5B are graphs showing tensile strength and degree of strength increase of aluminum alloys according to various compositions of the precipitation compound according to an embodiment of the present invention, respectively.

5A and 5B, manganese (curve b), titanium (curve c), iron (curve d), and chromium (transition metal), which are transition metals in an aluminum matrix containing 7 wt.% Of silicon and 0.3 wt. (Curve a) in which the transition metal is not contained in the various aluminum alloys in which the precipitation compounds each containing the transition metal (curve e) are formed. Particularly, an improvement in strength can be obtained in an aluminum alloy having a chromium or iron-containing precipitation compound, and an improvement in tensile strength can also be obtained in an aluminum alloy having a manganese-containing precipitation compound.

6 is a graph showing the measurement results of tensile strength of an aluminum alloy containing a precipitation compound and an aluminum alloy according to a comparative example according to still another embodiment of the present invention.

(Al-Si (7 wt.%) - Mg (0.3 wt.%) - Fe (0.3 wt.%) - Sr (0.1 wt.%) Of aluminum alloy molten metal by adding 1.0 wt.% Of ZnO precursor powder to the molten aluminum alloy. On the other hand, the aluminum alloy according to the comparative example is an aluminum alloy obtained by forming a cast material without adding ZnO, which is a non-metallic element-containing precursor, to the aluminum alloy melt and heat-treating it, and is an aluminum alloy lacking the precipitated compound. It was confirmed that the aluminum alloy according to the embodiment of the present invention (solid line curve) shows an improvement in yield strength of about 22% as compared with the aluminum alloy according to the comparative example (dotted line curve).

7 is a graph showing the measurement results of the tensile strength of an aluminum alloy (solid line curve) containing an precipitated compound according to another embodiment of the present invention and an aluminum alloy according to a comparative example.

7, an aluminum alloy according to an embodiment of the present invention indicated by a solid line is formed of aluminum alloy having a composition of Al (2.0 wt%) - Mg (1.0 wt%) - Mn (0.3 wt.%) wt.% of ZnO precursor powder to form a cast material, recrystallizing it through a calcination step by 90% rolling, and then subjecting it to heat treatment. The aluminum alloy according to the comparative example is an aluminum alloy manufactured by forming the cast material without adding the precursor powder to the molten aluminum, performing the sintering step, and then heat-treating the aluminum alloy. The aluminum alloy according to the embodiment of the present invention shows an improvement in yield strength of about 13% as compared with the aluminum alloy according to the comparative example.

As described above, the aluminum alloy including the precipitation compound between the aluminum-transition metal and non-metal elements according to the embodiment of the present invention can be manufactured by using the casting process and the heat treatment process. The above-described experimental examples are merely illustrative, and the present invention is not limited thereto. For example, even in the case of nitrogen and carbon, which are non-metallic elements capable of forming stable three-component reaction compounds similar to the oxygen, which is a non-metallic element, the precipitation compounds are uniformly formed in the aluminum base to improve the strength of the aluminum alloy It should be understood.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be clear to those who have knowledge.

Claims (15)

Aluminum base; And
And a precipitation compound dispersed in the aluminum matrix,
Wherein the precipitation compound comprises a compound comprising aluminum, at least one transition metal element, and at least one nonmetallic element, or a compound formed by including the constituent elements. The method according to claim 1,
Wherein the average size of the precipitated compound is in the range of 10 nm to 1 占 퐉. The method according to claim 1,
Wherein the transition metal element comprises at least one of chromium (Cr), iron (Fe), and manganese (Mn). The method according to claim 1,
Wherein the non-metallic element is supersaturated in the aluminum alloy and contains at least one of oxygen, nitrogen, and carbon. The method according to claim 1,
Wherein the precipitation compound is produced by heat treatment. The method according to claim 1,
The aluminum base is an aluminum alloy,
Wherein the alloy element of the aluminum alloy comprises at least one of silicon (Si), zinc (Zn), magnesium (Mg), and copper (Cu). The method according to claim 1,
Wherein the aluminum alloy is worked and hardened by firing. Providing a molten aluminum alloy comprising aluminum and a first transition metal;
A first reaction compound between the first transition metal and the nonmetal element, a second reaction compound between the first transition metal and a second transition metal different from the first transition metal, and a second reaction compound between the nonmetal element and the nonmetal element, Adding a non-metallic element-containing precursor containing at least one of the third reaction compounds;
Decomposing the non-metallic element-containing precursor in the molten metal to supersatethe non-metallic element in the molten metal;
Solidifying the molten metal to form a casting material; And
And heat-treating the solidified cast material to form an aluminum compound, a transition metal element, and a precipitation compound between non-metal elements dispersed in the aluminum-based matrix. 9. The method of claim 8,
Wherein the first transition metal element comprises at least one of chromium (Cr), iron (Fe), and manganese (Mn). 9. The method of claim 8,
Wherein the non-metallic element is at least one of oxygen, nitrogen, and carbon. 9. The method of claim 8,
Wherein the bivalent metal element of the third reaction compound comprises at least one of aluminum (Al), silicon (Si), magnesium (Mg), and tungsten (W). 9. The method of claim 8,
Wherein the non-metallic element-containing precursor is added to the melt in the form of a powder having an average diameter in the range of 5 nm to 50 nm. 13. The method of claim 12,
Wherein the non-metallic element-containing precursor is added in a range of 0.01 wt% to 5.0 wt% based on the total weight of the molten metal. 9. The method of claim 8,
Further comprising a step of subjecting the solidified cast material to plastic working and work hardening before the solidified casting material is heat-treated. 9. The method of claim 8,
Wherein the heat treatment is performed at a temperature in the range of 120 ° C to 600 ° C.

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