High-thermal-conductivity die-casting aluminum alloy material produced from secondary aluminum and preparation method thereof

A technology of casting aluminum alloy and high thermal conductivity, which is applied in the field of aluminum alloy

Pending Publication Date: 2021-11-02
HUAJIN NEW MATERIALS RES INST GUANGZHOU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this invention is to provide a die-casting aluminum alloy material with high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0028] The high thermal conductivity die-casting aluminum alloy material of this embodiment was prepared by the following steps:

[0029] (1) Dosing waste aluminum wire, waste magnesium, aluminum-strontium master alloy, aluminum-boron master alloy, iron additive and silicon according to the following weight percentages: Si: 7.0% to 11.0%, Mg: 0.3% to 1.0%, Fe: 0.6%~0.90%, Sr: 0.02%~0.06%, B≤0.03%, the balance is Al;

[0030] (2) Melt the raw materials, put 85% (by weight) of the waste aluminum wire into the furnace, start the fire to melt, add silicon when the temperature of the molten aluminum is 800°C to 850°C, stir well until it dissolves, and then Al-boron master alloy and iron additives are added, and the melting temperature is 750°C to 800°C.

[0031] (3) Add the remaining 15% (by weight) of waste aluminum wire, adjust the temperature to 720°C to 740°C, add waste magnesium, stir evenly,

[0032] (4) Carry out flux refining to the alloy melt of step (3), refining temper...

preparation Embodiment 2

[0041] The high thermal conductivity die-casting aluminum alloy material was prepared in the same steps as in Preparation Example 1, wherein the weight percentages of the elements in step (1) were: Si: 9.0% to 10.0%, Mg: 0.8% to 1.0%, Fe: 0.6% ~0.75% Sr: 0.02%~0.06%, B≤0.03%, the balance is Al.

preparation Embodiment 3

[0043] The high thermal conductivity die-casting aluminum alloy material was prepared in the same steps as in Preparation Example 1, wherein the weight percentages of the elements in step (1) were: Si: 8.0% to 10.0%, Mg: 0.7%, Fe: 0.6% to 0.75% Sr: 0.02% to 0.06%, B≤0.03%, and the balance is Al.

[0044] After testing, the thermal conductivity of the aluminum alloy material prepared in Preparation Examples 1-3 is ≥160w / m·k. Wherein the product of Preparation Example 2 has a tensile strength ≥ 290 MPa, a yield strength ≥ 160 MPa, and an elongation ≥ 4% in the die-cast state. Artificial aging (320 degrees for 3 hours) of die-casting parts, thermal conductivity ≥ 180w / m·k, but the mechanical properties will be slightly reduced, and still meet the use requirements for signal base stations.

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Abstract

The invention belongs to the technical field of aluminum alloys, and discloses a high-thermal-conductivity die-casting aluminum alloy material produced from secondary aluminum and a preparation method thereof. The high-thermal-conductivity die-casting aluminum alloy material is characterized in that (1) used materials are mainly reclaimed materials; (2) main components of an aluminum alloy comprise Si, Mg, Fe, Sr, B and Al, and the aluminum alloy comprises the following components including, by mass, 7.0%-11.0% of the Si, 0.3%-1.0% of the Mg, 0.6%-0.90% of the Fe, 0.02%-0.06% of the Sr, less than or equal to 0.03% of the B and the balance of the Al; (3) a smelting furnace is provided with double gates; and (4) in the production process, boronizing treatment is adopted, the standing time is prolonged, elements influencing the heat conductivity are settled to the bottom of the furnace in a boride form, and molten aluminum purification is achieved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a high thermal conductivity die-casting aluminum alloy material produced from recycled materials and a preparation method thereof. Background technique [0002] With the development of 5G technology, the CPU runs faster and generates more heat. If there is no technological revolution in materials, it is necessary to add more heat dissipation components or use deformed aluminum alloys, which are processed by CNC. The cost is high and the processing efficiency is high. Low. [0003] In order to adapt to the development of the situation, the aluminum alloy material industry uses pure aluminum ingots or even high-purity aluminum ingots to produce aluminum alloys with high thermal conductivity. The present invention uses the downstream product of electrical aluminum (aluminum wire or aluminum bus bar for power supply and distribution) as the main material. The mai...

Claims

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Application Information

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IPC IPC(8): C22C21/04C22C1/03C22C1/06
CPCC22C21/04C22C1/026C22C1/03C22C1/06C22C21/02
Inventor 范卫忠高伟全
Owner HUAJIN NEW MATERIALS RES INST GUANGZHOU CO LTD
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