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High-thermal-conductivity die casting aluminum 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 the problems of the thermal conductivity gap of Al-Mg-Si deformed aluminum alloy, etc., and achieve the effect of improving thermal conductivity, meeting the scope of industrial applications, and reducing energy consumption

Active Publication Date: 2015-01-07
SUZHOU KAI YOU ELECTRONICS SCI & TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the most commonly used die-casting aluminum alloy is AlSi12, in which the content of silicon is 12% of the eutectic point; its thermal conductivity in the as-cast state is about 96W / (m K), although its die-casting performance is good, but its thermal conductivity and There is still a certain gap in the thermal conductivity of Al-Mg-Si deformed aluminum alloys

Method used

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  • High-thermal-conductivity die casting aluminum alloy and preparation method thereof

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Embodiment 1

[0021] The weight percent of each component of the high thermal conductivity die-casting aluminum alloy in Example 1 of the present invention is: silicon: 10.5wt%; cobalt: 0.1wt%; iron: 0.2wt%; boron: 0.01wt%; titanium: 0.05wt%; The total sum of other impurities is less than or equal to 0.2%, and the balance is aluminum.

[0022] The preparation method of the high thermal conductivity die-casting aluminum alloy according to Example 1 of the present invention comprises the following steps:

[0023] 1) Drying: Dry the prepared raw materials: pure aluminum (purity ≥99.9wt%), aluminum-silicon master alloy, aluminum-iron master alloy, aluminum-boron master alloy, aluminum-titanium master alloy and cobalt oxide powder. , where Al and Co are dried at 100°C, while AlSi, AlFe, AlB and AlTi master alloys are dried at 150°C, and cobalt oxide powder is dried at 200°C;

[0024] 2) Melting: Use a crucible resistance furnace for melting, first preheat the resistance furnace to 200°C, and th...

Embodiment 2

[0027] The weight percent of each component of the high thermal conductivity die-casting aluminum alloy in Example 2 of the present invention is: silicon: 11wt%; cobalt: 0.2wt%; iron: 0.3wt%; boron: 0.02wt%; titanium: 0.03wt%; others The total sum of impurities is less than or equal to 0.2%, and the balance is aluminum.

[0028] The preparation method of the high thermal conductivity die-casting aluminum alloy in Example 2 of the present invention is the same as that in Example 1, but the inert gas used is nitrogen to obtain the die-casting alloy ingot A2.

Embodiment 3

[0030] The weight percent of each component of the high thermal conductivity die-casting aluminum alloy in Example 3 of the present invention is: silicon: 12wt%; cobalt: 0.3wt%; iron: 0.35wt%; boron: 0.04wt%; titanium: 0.01wt%; The total sum of impurities is less than or equal to 0.2%, and the balance is aluminum.

[0031] The preparation method of the high thermal conductivity die-casting aluminum alloy of Example 3 of the present invention is the same as that of Example 1, but the inert gas used is neon gas, and the die-casting alloy ingot A3 is obtained.

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Abstract

The invention relates to a high-thermal-conductivity die casting aluminum alloy and a preparation method thereof. The high-thermal-conductivity die casting aluminum alloy comprises the following ingredients according to weight percent: 10.50wt%-13.50wt% of Si, 0.10wt%-0.50wt% of Co, 0.20wt%-0.40wt% of Fe, 0.01wt%-0.05wt% of Ti, 0.01wt%-0.05wt% of B, less than or equal to 0.2% of other impurities, and the balance of aluminum. In the preparation process of the die casting aluminum alloy, the cobaltous oxide is used as an alterant, the addition of elements of B and Ti is combined, so that the die casting aluminum alloy of which the thermal conductivity reaches 190 W / (m.K)is prepared. On the basis of an existing cast aluminum alloy ZL102, the thermal conductivity of the high-thermal-conductivity die casting aluminum alloy is remarkably improved, moreover the excellent die casting property is achieved, and the application requirements of IT and automobile industries are greatly met.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high thermal conductivity die-casting aluminum alloy and a preparation method thereof. Background technique [0002] Cast aluminum alloys have the same alloy system as deformed aluminum alloys, and have the same strengthening mechanism as deformed aluminum alloys (except for strain strengthening). Their main difference is that the maximum content of alloying element silicon in cast aluminum alloys exceeds that of most deformed aluminum alloys. Silicon content in the alloy. In addition to containing strengthening elements, the cast aluminum alloy must also contain a sufficient amount of eutectic elements (usually silicon) so that the alloy has considerable fluidity and is easy to fill the shrinkage gap of the casting during casting. [0003] Aluminum alloy has good processing performance, especially eutectic aluminum-silicon die-casting alloy, which not only has good pr...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03
CPCC22C1/026C22C1/03C22C21/02
Inventor 邓邦惠余云
Owner SUZHOU KAI YOU ELECTRONICS SCI & TECH LTD
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