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High-plasticity aluminum-silicon alloy for die casting and preparation method thereof

An aluminum-silicon alloy and high plasticity technology, applied in the field of metal materials, can solve the problems of low plasticity, incomplete degassing and purification, and hole defects of aluminum-silicon alloy materials, and achieve good flow performance, reduce hole defects, and low cost Effect

Inactive Publication Date: 2013-01-30
南京宁铁有色合金科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the hypoeutectic aluminum-silicon alloy, on the one hand, due to the large crystallization temperature interval, the mushy zone is wide during the solidification process of the alloy, which is prone to shrinkage defects; on the other hand, the degassing and purification are not complete, which leads to There are serious void defects in the hypoeutectic alloy castings, which leads to the low plasticity of the existing aluminum silicon alloy materials

Method used

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  • High-plasticity aluminum-silicon alloy for die casting and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] High plasticity aluminum-silicon alloy, including the following components in weight percentage: 13% silicon, 0.40% manganese, 0.50% magnesium, 0.01% strontium, 0.12% iron, 0.10% copper, 0.07% zinc, and the rest is aluminum. The sum of the percentages is 100%.

[0031] Its preparation method comprises the following steps:

[0032] (1) Melt aluminum-manganese alloy, aluminum and silicon in a melting furnace for 3 hours to 780°C to obtain a smelting solution;

[0033] (2) Spray the sodium-free refining agent powder into the smelting furnace with argon gas as the carrier, refine the smelting liquid at 700°C for 40 minutes at a time, and remove the slag to obtain the refining liquid;

[0034] (3) Add aluminum-strontium alloy and magnesium to the refining solution in turn, and pass through argon gas for secondary refining at 680°C for 10 minutes, and let it stand for 40 minutes to obtain alloy solution;

[0035] (4) The alloy liquid is further purified by installing a glas...

Embodiment 2

[0037] High plasticity aluminum-silicon alloy, including the following components by weight percentage: 9.3% silicon, 0.30% manganese, 0.40% magnesium, 0.04% strontium, 0.12% iron, 0.03% copper, 0.08% zinc, and the rest is aluminum. The sum of the percentages is 100%.

[0038] Its preparation method comprises the following steps:

[0039] (1) Melt aluminum-manganese alloy, aluminum and silicon in a melting furnace for 2 hours to 800°C to obtain a smelting solution;

[0040] (2) Spray the sodium-free refining agent powder into the smelting furnace with argon gas as the carrier, refine the smelting liquid at 710°C for 20 minutes at a time, and remove the slag to obtain the refining liquid;

[0041] (3) Add aluminum-strontium alloy and magnesium to the refining liquid in turn, and pass through argon gas for secondary refining at 710°C for 15 minutes, and let it stand for 20 minutes to obtain alloy liquid;

[0042] (4) The alloy liquid is further purified by installing a glass f...

Embodiment 3

[0044]High plasticity aluminum-silicon alloy, including the following components in weight percentage: 9.0% silicon, 0.33% manganese, 0.38% magnesium, 0.04% strontium, 0.12% iron, 0.01% copper, 0.06% zinc, and the rest is aluminum. The sum of the percentages is 100%.

[0045] Its preparation method is with embodiment 1.

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Abstract

The invention provides high-plasticity aluminum-silicon alloy for die casting. The high-plasticity aluminum-silicon alloy comprises the following components in percentage by weight: 7.0 to 13.0 percent of silicon, 0.20 to 0.40 percent of magnesium, 0.20 to 0.50 percent of manganese, 0.01 to 0.15 percent of strontium, less than 0.15 percent of ferrum, less than 0.10 percent of copper, less than 0.10 percent of zinc and the balance of aluminum, wherein the sum of the mass percentage of each component is 100 percent. The aluminum-silicon alloy is light in weight, high in quality, strength and plasticity and high in flowing property, the elongation is more than 10 percent, and die casting pieces are easy to demold in the production process; and a preparation process is simple and low in cost.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a high-plasticity aluminum-silicon alloy for die-casting, and also to a preparation method of the high-plasticity aluminum-silicon alloy. Background technique [0002] Due to the advantages of low density, good fluidity and high specific strength, aluminum-silicon alloy is widely used in aerospace, petrochemical, automobile, machinery, civil and other fields, especially in aviation and automobile fields. The use of aluminum-silicon alloy materials can realize the light weight of vehicles Quantified, thus improving fuel efficiency. [0003] Existing aluminum-silicon alloy materials for die-casting usually include aluminum, silicon, magnesium, iron, copper, zinc and other components. Due to the different content of each element in the alloy, the spatial distribution of each element in the alloy is quite different, resulting in the comprehensive performance of each alloy. different, ...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03C22C1/06
Inventor 许永明邬宁
Owner 南京宁铁有色合金科技开发有限公司
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