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High thermal conductivity cast aluminium alloy and preparation method thereof

A technology of casting aluminum alloy and high thermal conductivity, which is applied in the field of metal materials, can solve problems such as gaps in thermal conductivity, achieve the effects of reducing energy consumption, improving casting performance and mechanical properties, and improving thermal conductivity

Inactive Publication Date: 2014-01-22
GUANGZHOU KINBON NON FERROUS ALLOY METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the thermal conductivity of this series of alloys is higher than that of cast aluminum alloys, there is still a certain gap with the thermal conductivity of Al-Mg-Si wrought aluminum alloys.

Method used

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  • High thermal conductivity cast aluminium alloy and preparation method thereof
  • High thermal conductivity cast aluminium alloy and preparation method thereof

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preparation example Construction

[0024] A method for preparing cast aluminum alloy with high thermal conductivity, comprising the following steps:

[0025] 1) Use a natural gas reflection melting furnace for melting, first melt the pure aluminum ingot, when the temperature of the pure aluminum liquid reaches 800-850°C, then add pure silicon, after the silicon is melted, then add the remaining intermediate alloy, after the melting is complete , stand still, and finally add magnesium. After the melting is complete, analyze the composition of the alloy melt before the furnace to detect the composition content of the alloy melt, and reach the qualified range by feeding or diluting the melt with unqualified composition content;

[0026] 2) Lower the temperature of the alloy melt with qualified composition to 730-750°C, blow the modificant boron oxide powder into the melt through inert gas, then continue to degas and remove slag with inert gas, and then carry out the component analysis before the furnace. After pou...

Embodiment 1

[0034] 1) Use a 5-ton natural gas reflective melting furnace for smelting. During the smelting process, first melt 2700Kg of pure aluminum ingots. When the temperature of the pure aluminum liquid reaches 830°C, add 210Kg of pure silicon. After the silicon is melted, add the remaining Intermediate alloys, namely 50Kg Al-3B, 3.6Kg Al-5Ti, 1.8Kg Al-10Zr, after the melting is complete, keep warm for 10 minutes, and finally add 12Kg magnesium. ;

[0035] 2) Lower the temperature of the alloy melt with qualified composition to 740°C, blow into the melt through nitrogen with a pressure of 0.2MPa and blow into the melt the weight of all substances and 0.04% of the modifier boron oxide powder, and then continue to degas with nitrogen Slag for 10 minutes, and then analyze the components before the furnace, and pour water to cast after passing the test.

Embodiment 2

[0037] 1) Use a 5-ton natural gas reflective melting furnace for melting. During the melting process, first melt 2700Kg of pure aluminum ingots. When the temperature of the pure aluminum liquid reaches 800°C, add 206Kg of pure silicon. After the silicon is melted, add the remaining Intermediate alloys, namely 50Kg Al-3B, 3.6Kg Al-5Ti, 1.8Kg Al-10Zr, after the melting is complete, keep warm for 15 minutes, and finally add 11Kg of magnesium. After the melting is complete, analyze the composition of the alloy melt before the furnace ;

[0038] 2) Lower the temperature of the alloy melt with qualified composition to 750°C, blow into the melt through nitrogen with a pressure of 0.4MPa and blow into the melt the weight of all material weight and 0.03% modifier boron oxide powder, and then continue to degas with nitrogen Slag for 10 minutes, then carry out the composition before the furnace, pour water and cast after passing the test.

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Abstract

The invention discloses a high thermal conductivity cast aluminium alloy and a preparation method thereof. The high thermal conductivity cast aluminium alloy comprises the following components by weight percent: 5.0-7.5% of silicone, 0.25-0.5% of magnesium, 0.01-0.06% of boron, 0.005-0.02% of titanium, 0.005-0.02% of zirconium, less than 0.2% of iron, less than 0.2% of copper, less than 0.1% of manganese, less than 0.1% of zinc, no more than 0.3% of all the other impurities and the balance of aluminium. The preparation method comprises that boron oxide is taken as a modificator, and then titanium and zirconium elements are added, thus a cast aluminium alloy with thermal conductivity as high as 210W / (m.K) can be prepared. The high thermal conductivity cast aluminium alloy has the advantages that thermal conductivity of a Al7SiMg cast aluminium alloy is obviously improved on the basis of the existing good casting property, mechanical property and thermal treatment property, and an industrial application range of the Al7SiMg cast aluminium alloy is expanded.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a casting aluminum alloy with high thermal conductivity and a preparation method thereof. Background technique [0002] Aluminum alloy has good processing performance, especially hypoeutectic aluminum-silicon alloy, which not only has good processing performance, but also has light specific gravity, beautiful surface and corrosion resistance. It has good casting performance during casting, good comprehensive mechanical properties of products, and its strength can be greatly improved after heat treatment. It is an excellent cast aluminum alloy, which can be used for various parts with complex shapes and is widely used in many fields. However, with the development of modern industry, especially aerospace technology, the research on the heat dissipation of integrated circuits in the electronics industry, and the improvement of the requirements for heating plates and radiators in the aut...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03
Inventor 许德英杨昭李绍康杨续跃范卫忠彭淳潘务晋陈学文梁树佳
Owner GUANGZHOU KINBON NON FERROUS ALLOY METALS CO LTD
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