Preparation method of high-heat-dissipation aluminum alloy automobile headlamp radiator

Abstract

The invention discloses a preparation method of a high-heat-dissipation aluminum alloy automobile headlamp radiator, which comprises the following steps: (a) putting a 1-series aluminum alloy and graphene into a smelting furnace, and smelting at 700-780 DEG C to form an alloy melt; (b) pouring the alloy melt into a casting mold, and naturally cooling to room temperature to obtain a casting; sawing the casting into blocks, placing the blocks in a forging die, and forging the blocks under the pressure condition of 250-280 MPa to obtain the automobile headlamp radiator; and (c) carrying out surface cleaning and inspection on the product in the step (b). A proper amount of graphene is added into the 1-series aluminum alloy, so that the heat conductivity coefficient of the 1-series aluminum alloy at the room temperature (at 20 DEG C) is increased to 290 W / mK; compared with a common aluminum radiator, the heat conductivity is greatly improved, and the radiator has the advantages of being excellent in heat conductivity, light in weight, low in cost, low in carbon and environmentally friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of metal forming and processing, and relates to a method for preparing an automobile headlight radiator, in particular to a method for preparing a high-heat dissipation aluminum alloy automobile headlight radiator. Background Art

[0002] With the development of the automotive industry, the performance and safety requirements of automobile headlights are constantly improving. Automobile headlights generate a lot of heat during operation, and effective heat dissipation is required to ensure their normal operation and service life. Traditional automobile headlight radiators are mostly made of aluminum die-forged materials, and their thermal conductivity at room temperature (20°C) is 130W / m·K. Although aluminum die-forged materials have the advantage of easy forming, they have problems such as high energy consumption, high carbon emissions, low dimensional accuracy and high cost. These problems limit the performance improvement and environmental protection development of automobile headlight radiators. Therefore, a new type of high heat dissipation aluminum alloy material and its preparation process are needed to meet the heat dissipation needs of modern automobile headlights.

[0003] Chinese invention patent application number CN109237430A discloses a heat sink for automotive lighting, belonging to the field of heat sink technology. It comprises a heat sink base and heat sink fins or fin columns. The outer surfaces of the heat sink base and the outer surfaces of the heat sink fins or fin columns are coated with a graphene coating with a thickness of 10-60μm. This patent significantly improves the heat dissipation efficiency of the heat sink, and its simple and easy manufacturing process and low manufacturing cost make it suitable for widespread use. However, the graphene coating is prone to detachment, affecting the service life and quality of the automotive lighting heat sink. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing a high-heat dissipation aluminum alloy automobile headlight radiator to meet the heat dissipation requirements of modern automobile headlights.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a method for preparing a high-heat dissipation aluminum alloy automobile headlight radiator, comprising the following steps:

[0006] (a) placing a 1-series aluminum alloy and graphene in a melting furnace and melting them at 700-780° C. to form an alloy melt;

[0007] (b) pouring the alloy melt into a casting mold and naturally cooling it to room temperature to obtain a casting; sawing the casting into blocks, placing the blocks in a forging mold, and forging them under a pressure of 250 to 280 MPa to obtain an automobile headlight radiator;

[0008] (c) cleaning and inspecting the surface of the product of step (b).

[0009] Optimally, in step (a), the grade of the 1 series aluminum alloy is a mixture of one or more selected from 1050, 1060, 1070, 1100, 1350, 1035, 1A99 and 1A95.

[0010] Optimally, in step (a), the mass ratio of the 1-series aluminum alloy to the graphene is 100:0.2-0.3.

[0011] Optimally, in step (a), the particle size D50 of the graphene is 3 to 6 μm.

[0012] Furthermore, in step (a), the smelting time is 30 to 50 minutes.

[0013] Optimally, in step (b), the alloy melt is poured into a casting mold at room temperature.

[0014] Furthermore, in step (b), the forging time is controlled to be 8 to 10 seconds.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the preparation method of the high-heat dissipation aluminum alloy automobile headlight radiator of the present invention increases the thermal conductivity coefficient of the 1 series aluminum alloy at room temperature (20°C) to 290W / mK by adding an appropriate amount of graphene to the 1 series aluminum alloy; compared with ordinary aluminum radiators, the thermal conductivity is greatly improved, and it has the characteristics of excellent thermal conductivity, lightweight, low cost, low carbon and environmental protection. DETAILED DESCRIPTION

[0016] The present invention provides a method for preparing a high-heat dissipation aluminum alloy automotive headlight radiator, comprising the following steps: (a) placing a 1-series aluminum alloy and graphene in a smelting furnace and smelting them at 700-780°C to form an alloy melt; (b) pouring the alloy melt into a casting mold and naturally cooling it to room temperature to obtain a casting; sawing the casting into blocks, placing them in a forging mold, and forging them under a pressure of 250-280 MPa to obtain an automotive headlight radiator; and (c) surface cleaning and inspecting the product of step (b). By adding an appropriate amount of graphene to the 1-series aluminum alloy, its room temperature (20°C) thermal conductivity is increased to 290 W / mK; compared to ordinary aluminum radiators, the thermal conductivity is significantly improved, and the radiator has the characteristics of excellent thermal conductivity, lightweight, low cost, and low carbon and environmental protection.

[0017] In step (a), the grade of the 1 series aluminum alloy is a mixture of one or more selected from 1050, 1060, 1070, 1100, 1350, 1035, 1A99 and 1A95. In step (a), the mass ratio of the 1 series aluminum alloy to the graphene is 100:0.2~0.3. In step (a), the particle size D50 of the graphene is 3~6μm. In step (a), the smelting time is 30~50min. In step (b), the alloy melt is poured into a casting mold at room temperature. In step (b), the forging time is controlled to 8~10 seconds

[0018] The preferred embodiments of the present invention will be described in detail below.

[0019] Example 1

[0020] This embodiment provides a method for preparing a high-heat dissipation aluminum alloy automobile headlight radiator, comprising the following steps:

[0021] (a) A 1050 aluminum alloy (100 kg) and graphene (0.25 kg, 1000ZAP6) were placed in a melting furnace and smelted at 750°C for 30 min while stirring to uniformly disperse the graphene in the aluminum alloy to form a uniform alloy melt.

[0022] (b) pouring the alloy melt into a casting mold and naturally cooling it to room temperature to obtain a casting; sawing the casting into blocks, placing one block in a forging mold, and forging it under a pressure of 250 MPa to obtain an automobile headlight radiator;

[0023] (c) cleaning and inspecting the surface of the product of step (b).

[0024] Example 2

[0025] This embodiment provides a method for preparing a high-heat dissipation aluminum alloy automobile headlight radiator, comprising the following steps:

[0026] (a) A 100 kg 1060 aluminum alloy and graphene (0.20 kg 1000ZAP6) were placed in a melting furnace and smelted at 780°C for 40 min while stirring to uniformly disperse the graphene in the aluminum alloy to form a uniform alloy melt.

[0027] (b) pouring the alloy melt into a casting mold and naturally cooling it to room temperature to obtain a casting; sawing the casting into blocks, placing one block in a forging mold, and forging it under a pressure of 280 MPa to obtain an automobile headlight radiator;

[0028] (c) cleaning and inspecting the surface of the product of step (b).

[0029] Example 3

[0030] This embodiment provides a method for preparing a high-heat dissipation aluminum alloy automobile headlight radiator, comprising the following steps:

[0031] (a) A series 1 aluminum alloy (1060 aluminum alloy, 100 kg) and graphene (0.30 kg, 1000ZAP6) were placed in a melting furnace and smelted at 700°C for 50 min while stirring to uniformly disperse the graphene in the aluminum alloy to form a uniform alloy melt.

[0032] (b) pouring the alloy melt into a casting mold and naturally cooling it to room temperature to obtain a casting; sawing the casting into blocks, placing one block in a forging mold, and forging it under a pressure of 265 MPa to obtain an automobile headlight radiator;

[0033] (c) cleaning and inspecting the surface of the product of step (b).

[0034] Comparative Example 1

[0035] This example provides a preparation method of an aluminum alloy automobile headlight radiator, which is basically the same as that in Example 1, except that a 1 series aluminum alloy (1050 aluminum alloy, 100 kg) and graphene (0.40 kg) are placed in a melting furnace to mix.

[0036] Comparative Example 2

[0037] This example provides a preparation method of an aluminum alloy automobile headlight radiator, which is basically the same as that in Example 1, except that a 1 series aluminum alloy (1050 aluminum alloy, 100 kg) and graphene (0.10 kg) are placed in a melting furnace to mix.

[0038] Comparative Example 3

[0039] This example provides a method for preparing an aluminum alloy automobile headlight radiator, which is basically the same as that in Example 1, except that graphene is not added.

[0040] The performance tests were conducted on the aluminum alloy automobile headlight radiators produced in Examples 1-3 and Comparative Examples 1-3. The results are shown in Table 1.

[0041] Table 1 Performance test table of aluminum alloy automobile headlight radiators in Examples 1-3 and Comparative Examples 1-3

[0042]

[0043]

[0044] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing a high heat dissipation aluminum alloy automobile headlight radiator, characterized in that: The following steps are involved: (a) placing a 1-series aluminum alloy and graphene in a melting furnace and melting them at 700-780° C. to form an alloy melt; (b) pouring the alloy melt into a casting mold and naturally cooling it to room temperature to obtain a casting; sawing the casting into blocks, placing the blocks in a forging mold, and forging them under a pressure of 250 to 280 MPa to obtain an automobile headlight radiator; (c) cleaning and inspecting the surface of the product of step (b).

2. The method for preparing the high heat dissipation aluminum alloy automobile headlight radiator according to claim 1, characterized in that: In step (a), the grade of the 1 series aluminum alloy is a mixture of one or more selected from 1050, 1060, 1070, 1100, 1350, 1035, 1A99 and 1A95.

3. The method for preparing the high heat dissipation aluminum alloy automobile headlight radiator according to claim 1, characterized in that: In step (a), the mass ratio of the 1-series aluminum alloy to the graphene is 100:0.2-0.

3.

4. The method for preparing the high heat dissipation aluminum alloy automobile headlight radiator according to claim 1, characterized in that: In step (a), the particle size D50 of the graphene is 3 to 6 μm.

5. The method for preparing the high heat dissipation aluminum alloy automobile headlight radiator according to claim 1, 2, 3 or 4, characterized in that: In step (a), the smelting time is 30 to 50 minutes.

6. The method for preparing the high heat dissipation aluminum alloy automobile headlight radiator according to claim 1, characterized in that: In step (b), the alloy melt is poured into a casting mold at room temperature.

7. The method for preparing the high heat dissipation aluminum alloy automobile headlight radiator according to claim 1 or 6, characterized in that: In step (b), the forging time is controlled to be 8 to 10 seconds.

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