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

Abstract

The present invention discloses a high thermal conductivity aluminum profile and a preparation method thereof. The high thermal conductivity aluminum profile includes the following components in terms of mass percentage: 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: remainder. The present application optimizes the composition and the ratio of the components, and reasonably adds Zn elements and rare earth elements, which can refine the grains, ensure the use strength of the aluminum profile, and also have excellent high thermal conductivity, thereby having a wider range of use value. In addition, the composite use of rare earth elements in the present application, the synergistic effect between the La element, the Re element, and the Ce element can further provide the strength and toughness of the aluminum alloy.

Description

Technical Field

[0001] The invention relates to the field of preparation of aluminum profiles, and in particular to a high thermal conductivity aluminum profile and a preparation method thereof. Background Art

[0002] Aluminum alloy is a multi-performance material that is conducive to lightweight equipment. It has many excellent physical and chemical properties, so it has been widely used in countries around the world. Different aluminum alloys play an important role in daily necessities, medical equipment, national defense and military industry, and transportation. In addition, as electronic products become thinner and lighter, the requirements for heat dissipation performance 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 of not being able to have both strength and heat dissipation at the same time, and cannot meet the heat dissipation requirements of electronic products in the prior art. Summary of the invention

[0003] 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 solution is as follows:

[0004] A high thermal conductivity aluminum profile comprises the following components according to mass percentage: 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%, and Al: the balance.

[0005] The present application provides a method for preparing a high thermal conductivity aluminum profile, comprising the following steps:

[0006] Adding pure aluminum into a smelting furnace for melting, and then smelting magnesium-aluminum alloy, zinc ingot, copper ingot, rare earth element, silicon and nickel powder to obtain a molten mixture;

[0007] Adding a covering agent to the molten mixture, then refining and modifying the mixture, leaving the mixture to stand, and then casting the mixture to obtain an ingot;

[0008] After the ingot is subjected to aging treatment, a high thermal conductivity aluminum profile is obtained.

[0009] Furthermore, the temperature of the melting treatment is 700°C to 720°C.

[0010] Furthermore, the temperature of the smelting treatment is 700° C. to 750° C., and the time of the smelting treatment is 3 h to 5 h.

[0011] Furthermore, the covering agent is obtained by mixing sodium carbonate, potassium chloride, corundum powder, stone powder and bentonite.

[0012] Furthermore, the mass ratio of the sodium carbonate, potassium chloride, stone powder and bentonite is 1-3:1-2:2-5:1-3.

[0013] Furthermore, the added amount of the covering agent is 1.5‰ to 5.5‰.

[0014] Furthermore, the refining treatment temperature is 760° C. to 780° C., and the refining treatment time is 30 min to 60 min.

[0015] Further, the aging treatment is: heating to 300°C-350°C at 100°C / h-120°C / h, keeping warm for 1h-3h, then heating to 480°C-500°C at 50°C / h-60°C / h, keeping warm for 1h-2h, then cooling to 300°C-320°C at 120°C / h-130°C / h, keeping warm for 1h-2h, then cooling to 100°C-160°C at 70°C / h-90°C / h, keeping warm for 3h-5h, and air cooling to room temperature with the furnace.

[0016] Furthermore, the rare earth elements are La, Re and Ce in a mass ratio of 1-5:2-3:1-3.

[0017] The present application optimizes the composition and the ratio of the components, reasonably adds Zn and rare earth elements, can refine the grains, ensure the use strength of the aluminum profile, and also have excellent high thermal conductivity, thus having a wider use value. In addition, the composite use of rare earth elements in the present application, the synergy between La, Re, and Ce elements can further improve the strength and toughness of the aluminum alloy. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the protection scope of the present invention.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0020] A high thermal conductivity aluminum profile in one embodiment of the present invention comprises the following components in terms of mass percentage: 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%, and Al: balance.

[0021] The present application provides a method for preparing a high thermal conductivity aluminum profile, comprising the following steps:

[0022] Adding pure aluminum into a smelting furnace for melting, and then smelting magnesium-aluminum alloy, zinc ingot, copper ingot, rare earth element, silicon and nickel powder to obtain a molten mixture;

[0023] Adding a covering agent to the molten mixture, then refining and modifying the mixture, leaving the mixture to stand, and then casting the mixture to obtain an ingot;

[0024] After the ingot is subjected to aging treatment, a high thermal conductivity aluminum profile is obtained.

[0025] In one embodiment, the temperature of the melting treatment is 700°C to 720°C.

[0026] In one embodiment, the smelting treatment temperature is 700° C. to 750° C., and the smelting treatment time is 3 h to 5 h.

[0027] In one embodiment, the covering agent is obtained by mixing sodium carbonate, potassium chloride, corundum powder, stone powder and bentonite.

[0028] In one embodiment, the mass ratio of the sodium carbonate, potassium chloride, stone powder and bentonite is 1 to 3: 1 to 2: 2 to 5: 1 to 3. By adding the covering agent, it is helpful to obtain a casting body with better overall quality.

[0029] In one embodiment, the added amount of the covering agent is 1.5‰ to 5.5‰.

[0030] In one embodiment, the refining treatment temperature is 760° C. to 780° C., and the refining treatment time is 30 min to 60 min.

[0031] In one embodiment, the aging treatment is as follows: heating to 300°C-350°C at 100°C / h-120°C / h, keeping warm for 1h-3h, then heating to 480°C-500°C at 50°C / h-60°C / h, keeping warm for 1h-2h, then cooling to 300°C-320°C at 120°C / h-130°C / h, keeping warm for 1h-2h, then cooling to 100°C-160°C at 70°C / h-90°C / h, keeping warm for 3h-5h, and air cooling to room temperature.

[0032] In one of the embodiments, the rare earth elements are La, Re and Ce in a mass ratio of 1-5:2-3:1-3.

[0033] The present application optimizes the composition and the ratio of the components, reasonably adds Zn and rare earth elements, can refine the grains, ensure the use strength of the aluminum profile, and also have excellent high thermal conductivity, thus having a wider use value. In addition, the composite use of rare earth elements in the present application, the synergy between La, Re, and Ce elements can further improve the strength and toughness of the aluminum alloy.

[0034] The embodiments of the present invention will be described in detail below with reference to specific examples.

[0035] Embodiment 1~3:

[0036] The ingredients and proportions of Examples 1 to 3 are different, as shown in Table 1. The preparation methods are as follows:

[0037] A method for preparing a high thermal conductivity aluminum profile comprises the following steps:

[0038] Adding pure aluminum into a smelting furnace and melting it at 700° C., and then melting the magnesium-aluminum alloy, zinc ingot, copper ingot, rare earth element, silicon and nickel powder at 700° C. for 3 h to 5 h to obtain a molten mixture;

[0039] Adding a covering agent to the molten mixture, refining the mixture at 760° C. for 60 min, performing a modification treatment, keeping the mixture at the temperature for 3 h, and then casting the mixture to obtain an ingot;

[0040] The ingot was heated to 300°C at 100°C / h, kept warm for 1h, then heated to 480°C at 50°C / h, kept warm for 1h, then cooled to 300°C at 120°C / h, kept warm for 1h, then cooled to 100°C at 70°C / h, kept warm for 3h, and air-cooled to room temperature to obtain a high thermal conductivity aluminum profile.

[0041] Comparative Examples 1 to 4:

[0042] The difference between Comparative Examples 1 to 4 and Example 3 is that the ingredients and the ratio of the ingredients are different, as shown in Table 1, and the rest are the same as Example 3.

[0043] Comparative Example 5:

[0044] 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:

[0045] A method for preparing an aluminum profile comprises the following steps:

[0046] Adding pure aluminum into a smelting furnace and melting it at 700° C., and then melting the magnesium-aluminum alloy, zinc ingot, copper ingot, rare earth element, silicon and nickel powder at 700° C. for 3 h to 5 h to obtain a molten mixture;

[0047] Adding a covering agent to the molten mixture, refining the mixture at 760°C for 60 minutes, performing a modification treatment, keeping the mixture at the temperature for 3 hours, and then casting the mixture to obtain an ingot;

[0048] The ingot was heated to 300° C. at 100° C. / h, kept at that temperature for 1 hour, and air-cooled to room temperature in the furnace to obtain an aluminum profile.

[0049] Table 1:

[0050]

[0051]

[0052] The high thermal conductivity aluminum profiles prepared in Examples 1 to 3 and the aluminum profiles prepared in Comparative Examples 1 to 5 were subjected to performance tests, and the results are shown in Table 2 below.

[0053] Table 2:

[0054]

[0055] From the data analysis of 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 synergistic effect between the rare earth components is better than that of a single component.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations 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 of the present invention shall be subject to the attached claims.

Claims

1. A high thermal conductivity aluminum profile, characterized in that: According to mass percentage, the high thermal conductivity aluminum profile 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: balance; The rare earth elements are La, Re and Ce in a mass ratio of 1-5:2-3:1-3; The method for preparing the high thermal conductivity aluminum profile comprises the following steps: Adding pure aluminum into a smelting furnace for melting, and then smelting magnesium-aluminum alloy, zinc ingot, copper ingot, rare earth element, silicon and nickel powder to obtain a molten mixture; Adding a covering agent to the molten mixture, then refining and modifying the mixture, leaving the mixture to stand, and then casting the mixture to obtain an ingot; The ingot is subjected to aging treatment, and the aging treatment is as follows: heating to 300°C-350°C at 100°C / h-120°C / h, keeping the temperature for 1h-3h, then heating to 480°C-500°C at 50°C / h-60°C / h, keeping the temperature for 1h-2h, then cooling to 300°C-320°C at 120°C / h-130°C / h, keeping the temperature for 1h-2h, then cooling to 100°C-160°C at 70°C / h-90°C / h, keeping the temperature for 3h-5h, and air cooling to room temperature with the furnace to obtain a high thermal conductivity aluminum profile.

2. The high thermal conductivity aluminum profile according to claim 1, characterized in that: The temperature of the melting treatment is 700°C to 720°C.

3. The high thermal conductivity aluminum profile according to claim 2, characterized in that: The temperature of the smelting treatment is 700° C. to 750° C., and the time of the smelting treatment is 3 h to 5 h.

4. The high thermal conductivity aluminum profile according to claim 2, characterized in that: The covering agent is obtained by mixing sodium carbonate, potassium chloride, corundum powder, stone powder and bentonite.

5. The high thermal conductivity aluminum profile according to claim 4, 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.

6. The high thermal conductivity aluminum profile according to claim 5, characterized in that: The added amount of the covering agent is 1.5‰~5.5‰.

7. The high thermal conductivity aluminum profile according to claim 2, characterized in that: The refining treatment temperature is 760° C. to 780° C., and the refining treatment time is 30 min to 60 min.

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