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A kind of high thermal conductivity cast aluminum alloy and preparation method thereof

A technology of casting aluminum alloy and high thermal conductivity, which is applied in the field of aluminum alloy manufacturing, can solve the problems of unsatisfactory comprehensive performance of aluminum alloy, and achieve the effects of good casting fluidity, high thermal conductivity and reduced surface tension

Active Publication Date: 2018-01-09
GUANGDONG INST OF MATERIALS & PROCESSING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Through the analysis of the above documents, it can be found that the existing technology is mainly based on Al-Si series cast aluminum alloys or Al-Mg-Si series deformed aluminum alloys, by adding a large amount of alloying elements to improve the casting fluidity of aluminum alloys, Thermal conductivity or mechanical properties, but the overall performance of existing aluminum alloys is still not ideal

Method used

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  • A kind of high thermal conductivity cast aluminum alloy and preparation method thereof
  • A kind of high thermal conductivity cast aluminum alloy and preparation method thereof
  • A kind of high thermal conductivity cast aluminum alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] The high thermal conductivity cast aluminum alloy of the present invention contains Si 4.5%, Mg 0.3%, Ti 0.02%, Eu 0.02%, Re 0.01%, and the rest is Al and unavoidable impurities, wherein the composition and mass percentage of Re are : Tb 26%, Dy 24%, Ho 18%, Tm 17%, Yb 8%, Lu 7%. Its preparation method is as follows:

[0029] Step 1: Select Al-10Ti alloy, Al-10Eu alloy, aluminum ingot with a purity of 99.7%, magnesium ingot with 99.9%, instant silicon with 99.9% and mixed heavy rare earth Re with 99.9% as raw materials. The ingredients list is as follows:

[0030]

[0031] Step 2: Heat and melt the aluminum ingot in a crucible resistance furnace and raise the temperature to 760°C, add instant silicon and magnesium ingots, stir and melt to form an aluminum alloy liquid;

[0032] Step 3: After refining and deslagging the aluminum alloy liquid with hexachloroethane, add Al-10Ti alloy, Al-10Eu alloy and mixed heavy rare earth Re, and stir to make the composition of the ...

Embodiment 2

[0037] The high thermal conductivity cast aluminum alloy of the present invention contains Si 5.0%, Mg 0.4%, Ti 0.03%, Eu 0.03%, Re 0.02%, and the rest is Al and unavoidable impurities, wherein the composition and mass percentage of Re are : Tb 26%, Dy 24%, Ho 18%, Tm 17%, Yb 8%, Lu 7%. Its preparation method is as follows:

[0038] Step 1: Select Al-10Ti alloy, Al-10Eu alloy, aluminum ingot with a purity of 99.7%, magnesium ingot with 99.9%, instant silicon with 99.9% and mixed heavy rare earth Re with 99.9% as raw materials. The ingredients list is as follows:

[0039]

[0040] Step 2: Heat and melt the aluminum ingot in a crucible resistance furnace and raise the temperature to 770°C, add instant silicon and magnesium ingots, stir and melt to form an aluminum alloy liquid;

[0041] Step 3: After refining and deslagging the aluminum alloy liquid with hexachloroethane, add Al-10Ti alloy, aluminum Al-10Eu alloy and mixed heavy rare earth Re, and stir to make the compositio...

Embodiment 3

[0046] The high thermal conductivity cast aluminum alloy of the present invention contains Si 5.5%, Mg 0.5%, Ti 0.04%, Eu 0.04%, Re 0.03%, and the rest is Al and unavoidable impurities, wherein the composition and mass percentage of Re are : Tb 26%, Dy 24%, Ho 18%, Tm 17%, Yb 8%, Lu 7%. Its preparation method is as follows:

[0047] Step 1: Select Al-10Ti alloy, Al-10Eu alloy, aluminum ingot with a purity of 99.7%, magnesium ingot with 99.9%, instant silicon with 99.9% and mixed heavy rare earth Re with 99.9% as raw materials. The ingredients list is as follows:

[0048]

[0049] Step 2: Heat and melt the aluminum ingot in a crucible resistance furnace and raise the temperature to 780°C, add instant silicon and magnesium ingots, stir and melt to form an aluminum alloy liquid;

[0050] Step 3: After refining and deslagging the aluminum alloy liquid with hexachloroethane, add Al-10Ti alloy, Al-10Eu alloy and mixed heavy rare earth Re, and stir to make the composition of the ...

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Abstract

The invention provides high-thermal-conductivity cast aluminum alloy and a preparation method thereof. The high-thermal-conductivity cast aluminum alloy comprises, by mass, 4.5%-5.5% of Si, 0.3%-0.5% of Mg, 0.02%-0.04% of Ti, 0.02%-0.04% of Eu, 0.01%-0.03% of Re and the balance Al and inevitable impurities. The preparation method of the high-thermal-conductivity cast aluminum alloy comprises the steps that an aluminum ingot is heated and melted, added with instantly dissolved silicon and a magnesium ingot and stirred and melted, so that molten aluminum alloy is formed; after the molten aluminum alloy is subjected to refining and deslagging, aluminum-titanium alloy, aluminum-europium alloy and mixed heavy rare earth are added and stirred to enable the component of the molten aluminum alloy to be uniform; the molten aluminum alloy is cooled to 670 DEG C-690 DEG C and then subjected to still standing for 1-2 h, so that the aluminum alloy is casted; and the aluminum alloy is subjected to solid solution treatment for 6-8 h at the temperature of 495 DEG C-505 DEG C and then is subjected to aging treatment for 12-15 h at the temperature of 195 DEG C-205 DEG C after water quenching is conducted, and the aluminum alloy is cooled along with a furnace finally, so that the high-thermal-conductivity cast aluminum alloy is obtained. The high-thermal-conductivity cast aluminum alloy has the advantages of being good in casting fluidity, high in thermal conductivity coefficient and excellent in mechanical performance.

Description

technical field [0001] The invention belongs to the field of aluminum alloy manufacturing, and in particular relates to a casting aluminum alloy with high thermal conductivity and a preparation method thereof. Background technique [0002] Aluminum alloy has the characteristics of light weight, good strength and toughness, corrosion resistance and unique metallic luster, and is adopted by more and more electronic appliances, communication equipment, lighting devices, automobiles and other parts, such as smart phones, notebook computers, tablets Computer casings, radiators and lampshades for LED lights, radiators, cabinets, and filters for 3G and 4G wireless communication base stations, heating plates for rice cookers, induction cookers, and water heaters, controller boxes for new energy vehicles, drive motor casings, etc. In order to meet the needs of thin-walled parts, light weight, rapid heat dissipation and casting production, higher and higher requirements are put forwar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/06C22C1/03C22F1/043
CPCC22C1/026C22C1/03C22C1/06C22C21/02C22F1/043
Inventor 牛艳萍王顺成郑开宏唐维学
Owner GUANGDONG INST OF MATERIALS & PROCESSING
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