CN116287893A - High-heat-conductivity aluminum profile and preparation method thereof - Google Patents

Abstract

The invention discloses a high thermal conductivity aluminum profile and a preparation method thereof. According to the mass percentage, the high thermal conductivity aluminum profile includes the following components: Mg: 0.25% to 0.40%, Zn: ≤0.05%, Cu: 0.1% ～0.15%, rare earth elements: 0.01%～0.05%, Si: 0.1%～0.2%, Ni: ≤0.15%, total content of other impurity elements≤0.15%, Al: balance. In this application, by optimizing the composition and composition ratio, adding Zn element and rare earth element reasonably, the crystal grain can be refined, and the strength of the aluminum profile can be ensured, while having excellent high thermal conductivity, and thus having wider use value. In addition, in this application, the synergistic effect between rare earth elements, La elements, Re elements, and Ce elements can further improve the strength and toughness of the aluminum alloy.

Description

A kind of high thermal conductivity aluminum profile and preparation method thereof

technical field

The invention relates to the field of preparation of aluminum profiles, in particular to an aluminum profile with high thermal conductivity and a preparation method thereof.

Background technique

Aluminum alloy is a multi-performance material that is conducive to the lightweight of equipment. It has many excellent physical and chemical properties, so it has been widely used in countries all over the world. Different aluminum alloys play an important role in daily necessities, medical equipment, national defense and transportation. In addition, as electronic products become lighter and thinner, their heat dissipation performance requirements are getting higher and higher. Therefore, it is also of great significance to study metal materials with high thermal conductivity. The aluminum profiles in the prior art have the problem that they cannot have both strength and heat dissipation, and cannot meet the heat dissipation requirements of electronic products in the prior art.

Contents of the invention

Based on this, in order to solve the problem that the aluminum profile in the prior art cannot have both strength and heat dissipation, the present invention provides a high thermal conductivity aluminum profile and a preparation method thereof. The specific technical scheme is as follows:

An aluminum profile with high thermal conductivity. According to the mass percentage, the aluminum profile with high thermal conductivity includes the following components: Mg: 0.25% to 0.40%, Zn: ≤0.05%, Cu: 0.1% to 0.15%, rare earth element: 0.01 % to 0.05%, Si: 0.1% to 0.2%, Ni: ≤0.15%, the total content of other impurity elements ≤0.15%, Al: the balance.

The application provides a method for preparing a high thermal conductivity aluminum profile, comprising the following steps:

Add pure aluminum to the smelting furnace for melting treatment, and then smelt magnesium aluminum alloy, zinc ingot, copper ingot, rare earth elements, silicon and nickel powder to obtain a molten mixture;

Adding a covering agent to the molten mixture, followed by refining treatment, modification treatment, standing still, and casting to obtain an ingot;

After the ingot is subjected to aging treatment, a high thermal conductivity aluminum profile is obtained.

Further, the temperature of the melting treatment is 700°C-720°C.

Further, the temperature of the smelting treatment is 700°C-750°C, and the time of the smelting treatment is 3h-5h.

Further, the covering agent is obtained by mixing sodium carbonate, potassium chloride, corundum powder, stone powder, and bentonite.

Further, the mass ratio of the sodium carbonate, potassium chloride, stone powder and bentonite is 1-3:1-2:2-5:1-3.

Further, the addition amount of the covering agent is 1.5‰～5.5‰.

Further, the temperature of the refining treatment is 760° C. to 780° C., and the refining treatment time is 30 minutes to 60 minutes.

Further, the aging treatment is: heating at 100°C/h-120°C/h to 300°C-350°C, keeping the temperature for 1h-3h, then raising the temperature at 50°C/h-60°C/h to 480°C-500°C, Keep warm for 1h-2h, then cool down at 120°C/h-130°C/h to 300°C-320°C, keep warm for 1h-2h, then cool down at 70°C/h-90°C/h to 100°C-160°C, keep warm for 3h ~5h, air-cooled to room temperature with the furnace.

Further, the rare earth elements are La element, Re element and Ce element with a mass ratio of 1-5:2-3:1-3.

In this application, by optimizing the composition and composition ratio, adding Zn element and rare earth element reasonably, the crystal grain can be refined, and the strength of the aluminum profile can be ensured, while having excellent high thermal conductivity, and thus having wider use value. In addition, in this application, the synergistic effect between rare earth elements, La elements, Re elements, and Ce elements can further improve the strength and toughness of the aluminum alloy.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with its embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An aluminum profile with high thermal conductivity in an embodiment of the present invention, according to the mass percentage, the aluminum profile with high thermal conductivity includes the following components: Mg: 0.25% to 0.40%, Zn: ≤0.05%, Cu: 0.1% to 0.15%, rare earth elements: 0.01%-0.05%, Si: 0.1%-0.2%, Ni: ≤0.15%, other impurity elements total content ≤0.15%, Al: balance.

The application provides a method for preparing a high thermal conductivity aluminum profile, comprising the following steps:

Add pure aluminum to the smelting furnace for melting treatment, and then smelt magnesium aluminum alloy, zinc ingot, copper ingot, rare earth elements, silicon and nickel powder to obtain a molten mixture;

Adding a covering agent to the molten mixture, followed by refining treatment, modification treatment, standing still, and casting to obtain an ingot;

After the ingot is subjected to aging treatment, a high thermal conductivity aluminum profile is obtained.

In one embodiment, the temperature of the melting treatment is 700°C-720°C.

In one embodiment, the temperature of the smelting treatment is 700° C. to 750° C., and the time of the smelting treatment is 3 hours to 5 hours.

In one embodiment, the covering agent is obtained by mixing sodium carbonate, potassium chloride, corundum powder, stone powder and bentonite.

In one embodiment, the mass ratio of sodium carbonate, potassium chloride, stone powder, and bentonite is 1-3:1-2:2-5:1-3. By adding this covering agent, it can contribute to obtaining a cast body with better overall quality.

In one embodiment, the amount of the covering agent added is 1.5‰˜5.5‰.

In one of the embodiments, the temperature of the refining treatment is 760° C. to 780° C., and the refining treatment time is 30 minutes to 60 minutes.

In one of the embodiments, the aging treatment is: heating at 100°C/h-120°C/h to 300°C-350°C, keeping the temperature for 1h-3h, and then raising the temperature to 480°C at 50°C/h-60°C/h ～500℃, keep warm for 1h～2h, then cool down to 300℃～320℃ at 120℃/h～130℃/h, keep warm for 1h～2h, then cool down to 100℃～160℃ at 70℃/h～90℃/h ℃, keep warm for 3h to 5h, and air-cool to room temperature with the furnace.

In one embodiment, the rare earth elements are La element, Re element and Ce element with a mass ratio of 1-5:2-3:1-3.

In this application, by optimizing the composition and composition ratio, adding Zn element and rare earth element reasonably, the crystal grain can be refined, and the strength of the aluminum profile can be ensured, while having excellent high thermal conductivity, and thus having wider use value. In addition, in this application, the synergistic effect between rare earth elements, La elements, Re elements, and Ce elements can further improve the strength and toughness of the aluminum alloy.

Embodiments of the present invention will be described in detail below in conjunction with specific examples.

Embodiment 1～3:

The components and composition ratios of Examples 1-3 are different, specifically as shown in Table 1, and the preparation method is as follows:

A method for preparing an aluminum profile with high thermal conductivity, comprising the following steps:

Add pure aluminum to the smelting furnace and melt it at 700°C, and then melt magnesium alloy, zinc ingot, copper ingot, rare earth elements, silicon and nickel powder at 700°C for 3h~5h to obtain molten mixture;

Adding a covering agent to the molten mixture, and then carrying out refining treatment at 760°C for 60 minutes, denatured treatment, keeping the temperature for 3 hours, and then casting to obtain an ingot;

The ingot was heated up to 300°C at 100°C/h, kept for 1h, then raised to 480°C at 50°C/h, kept for 1h, then cooled to 300°C at 120°C/h, kept for 1h, and then heated at 70°C/h h, cool down to 100°C, keep warm for 3 hours, and air-cool to room temperature with the furnace to obtain high thermal conductivity aluminum profiles.

Comparative examples 1 to 4:

The difference between Comparative Examples 1-4 and Example 3 lies in the different components and component distribution ratios, as shown in Table 1, and the others are the same as Example 3.

Comparative example 5:

The difference between Comparative Example 5 and Example 3 is that the preparation method of the aluminum profile in Comparative Example 5 is as follows:

A method for preparing an aluminum profile, comprising the steps of:

Add pure aluminum to the smelting furnace and melt it at 700°C, and then melt magnesium alloy, zinc ingot, copper ingot, rare earth elements, silicon and nickel powder at 700°C for 3h~5h to obtain molten mixture;

Adding a covering agent to the molten mixture, and then carrying out refining treatment at 760°C for 60 minutes, denatured treatment, keeping the temperature for 3 hours, and then casting to obtain an ingot;

The ingot was heated up to 300° C. at a rate of 100° C./h, kept at a temperature of 1 hour, and then air-cooled to room temperature with the furnace to obtain an aluminum profile.

Table 1:

Performance tests were performed on the high thermal conductivity aluminum profiles prepared in Examples 1-3 and the aluminum profiles prepared in Comparative Examples 1-5, and the results are shown in Table 2 below.

Table 2:

From the data analysis in Table 2, it can be seen that by optimizing the components and the ratio of the components in this application, a product with excellent strength and thermal conductivity can be obtained, and the synergy between the rare earth components is better than a single component.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. An aluminum profile with high thermal conductivity, characterized in that, according to the mass percentage, the aluminum profile with high thermal conductivity includes the following components: Mg: 0.25% to 0.40%, Zn: ≤0.05%, Cu: 0.1% to 0.15% %, rare earth elements: 0.01% to 0.05%, Si: 0.1% to 0.2%, Ni: ≤0.15%, the total content of other impurity elements ≤0.15%, Al: the balance. 2. A preparation method of a high thermal conductivity aluminum profile, characterized in that, the preparation method comprises the following steps: Add pure aluminum to the smelting furnace for melting treatment, and then smelt magnesium aluminum alloy, zinc ingot, copper ingot, rare earth elements, silicon and nickel powder to obtain a molten mixture; Adding a covering agent to the molten mixture, followed by refining treatment, modification treatment, standing still, and casting to obtain an ingot; After the ingot is subjected to aging treatment, a high thermal conductivity aluminum profile is obtained. 3. The preparation method according to claim 2, characterized in that the temperature of the melting treatment is 700°C-720°C. 4. The preparation method according to claim 2, characterized in that the temperature of the smelting treatment is 700°C-750°C, and the time of the smelting treatment is 3h-5h. 5. The preparation method according to claim 2, wherein the covering agent is obtained by mixing sodium carbonate, potassium chloride, corundum powder, stone powder and bentonite. 6. The preparation method according to claim 5, characterized in that the mass ratio of the sodium carbonate, potassium chloride, stone powder and bentonite is 1-3:1-2:2-5:1-3. 7. The preparation method according to claim 6, characterized in that the amount of the covering agent added is 1.5‰˜5.5‰. 8. The preparation method according to claim 2, characterized in that, the temperature of the refining treatment is 760°C-780°C, and the refining treatment time is 30min-60min. 9. The preparation method according to claim 2, characterized in that the aging treatment is: heating up to 300°C-350°C at 100°C/h-120°C/h, keeping warm for 1h-3h, and then 50°C/h ～60℃/h to 480℃～500℃, keep warm for 1h～2h, then cool down to 300℃～320℃ at 120℃/h～130℃/h, keep warm for 1h～2h, then use 70℃/h～90 ℃/h to cool down to 100℃～160℃, keep warm for 3h～5h, and air-cool to room temperature with the furnace. 10 . The preparation method according to claim 2 , wherein the rare earth elements are La element, Re element and Ce element with a mass ratio of 1-5:2-3:1-3. 11 .