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Graphene reinforced hypereutectic aluminum-silicon alloy and preparation method thereof

A technology of aluminum-silicon alloy and graphene, which is applied in the field of aluminum alloy, can solve the problems of reducing the mechanical properties of materials, low cooling rate, splitting the alloy matrix, etc., and achieve the effects of improving comprehensive mechanical properties, reducing volume, and avoiding agglomeration

Inactive Publication Date: 2020-08-25
广州埃米石墨烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Under traditional casting conditions, due to the low cooling rate, there are a large number of coarse polygonal block or plate-shaped primary silicon and long needle-shaped eutectic silicon in the untreated hypereutectic Al-Si alloy, which severely splits the alloy matrix. And stress concentration occurs at the tip and corners of the silicon phase, which significantly reduces the mechanical properties of the material

Method used

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  • Graphene reinforced hypereutectic aluminum-silicon alloy and preparation method thereof
  • Graphene reinforced hypereutectic aluminum-silicon alloy and preparation method thereof
  • Graphene reinforced hypereutectic aluminum-silicon alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this example, 70 g of graphene-enhanced hypereutectic aluminum-silicon alloy is to be prepared, in which the amount of graphene added is 0.001wt.%, the amount of zirconium added is 0.1wt.%, and the mass percentages of other raw materials are: silicon 19.0wt.%, Magnesium 0.58wt.%, Zinc 0.03wt.%, Manganese 0.02wt.%, Titanium 0.02wt.%, Beryllium 0.01wt.%, Tin 0.03wt.%, Lead 0.02wt.%, Aluminum balance; specific steps are as follows:

[0054] Step 1: Weigh each raw material according to weight percentage, and prepare aluminum pellets, aluminum foil, silicon pellets, magnesium pellets, graphene, zirconium pellets, zinc pellets, manganese pellets, titanium pellets, beryllium pellets, tin pellets, and lead pellets;

[0055] Step 2: Spread the graphene on the aluminum foil (thickness 0.1mm, 5cm×5cm), drop high-purity alcohol (volume content ≥ 99.7%), until all the graphene is wet and fully adhered to the surface of the aluminum foil, fold the aluminum foil Wrap the graphene t...

Embodiment 2

[0063] In this example, 70 g of graphene-reinforced hypereutectic aluminum-silicon alloy is prepared, in which the amount of graphene added is 0.003wt.%, the amount of zirconium added is 0.1wt.%, and the mass percentages of other raw materials are: silicon 19.0wt.%, Magnesium 0.58wt.%, Zinc 0.03wt.%, Manganese 0.02wt.%, Titanium 0.02wt.%, Beryllium 0.01wt.%, Tin 0.03wt.%, Lead 0.02wt.%, Aluminum balance; specific steps are as follows:

[0064] Step 1: Weigh each raw material according to weight percentage, and prepare aluminum pellets, aluminum foil, silicon pellets, magnesium pellets, graphene, zirconium pellets, zinc pellets, manganese pellets, titanium pellets, beryllium pellets, tin pellets, and lead pellets;

[0065] Step 2: Spread the graphene on the aluminum foil (thickness 0.1mm, 5cm×5cm), drop high-purity alcohol (volume content ≥ 99.7%), until all the graphene is fully adhered to the surface of the aluminum foil, fold the aluminum foil to wrap Graphene, obtain the al...

Embodiment 3

[0073] In this example, 70 g of graphene-reinforced hypereutectic aluminum-silicon alloy is to be prepared, wherein the addition of graphene is 0.005wt.%, the addition of zirconium is 0.1wt.%, and the mass percentages of other raw materials are: silicon 19.0wt.%, Magnesium 0.58wt.%, Zinc 0.03wt.%, Manganese 0.02wt.%, Titanium 0.02wt.%, Beryllium 0.01wt.%, Tin 0.03wt.%, Lead 0.02wt.%, Aluminum balance; specific steps are as follows:

[0074] Step 1: Weigh each raw material according to weight percentage, and prepare aluminum pellets, aluminum foil, silicon pellets, magnesium pellets, graphene, zirconium pellets, zinc pellets, manganese pellets, titanium pellets, beryllium pellets, tin pellets, and lead pellets;

[0075] Step 2: Spread the graphene on the aluminum foil (thickness 0.1mm, 5cm×5cm), drop high-purity alcohol (volume content ≥ 99.7%), until all the graphene is fully adhered to the surface of the aluminum foil, fold the aluminum foil to wrap Graphene, obtain the alumi...

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Abstract

The invention provides graphene reinforced hypereutectic aluminum-silicon alloy and a preparation method of the graphene reinforced hypereutectic aluminum-silicon alloy. According to the chemical components, the graphene reinforced hypereutectic aluminum-silicon alloy comprises, by mass percentage, 18.0%-20.0% of Si, 0.45%-0.70% of Mg, 0.001%-0.009% of graphene, 0.1%-0.3% of Zr, smaller than or equal to 0.2% of Zn, smaller than or equal to 0.1% of Mn, smaller than or equal to 0.1% of Ti, smaller than or equal to 0.1% of Be, smaller than or equal to 0.05% of Sn, smaller than or equal to 0.1% ofPb, smaller than or equal to 0.03% of each of other unspecified impurity elements, smaller than or equal to 0.10% of total impurity elements and the balance Al. The content of graphene in the provided graphene reinforced hypereutectic aluminum-silicon alloy is much smaller than that of graphene of existing graphene composite aluminum alloy, the cost is reduced, the comprehensive mechanical properties of the obtained graphene reinforced hypereutectic aluminum-silicon alloy are remarkably improved, and the application of the graphene reinforced hypereutectic aluminum-silicon alloy in the industrial field is broadened.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a graphene-reinforced hypereutectic aluminum-silicon alloy and a preparation method thereof. Background technique [0002] Hypereutectic aluminum-silicon alloy is an important casting aluminum alloy. Its alloy composition exceeds the eutectic composition point. It has the advantages of low density, high specific strength and specific stiffness, excellent wear resistance, good volume stability and low thermal expansion coefficient. , It is widely used in aerospace, automobile, marine, chemical industry, machinery manufacturing and other fields. At the same time, the hypereutectic aluminum-silicon alloy is an ideal material for manufacturing the key parts of the engine—cylinders and pistons. It can solve a series of problems in the engine such as cylinder scuffing, cylinder holding, oil blowing, blowing gas, carbon deposits, fuel consumption, and noise increase....

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/02C22C1/10
CPCC22C21/02C22C1/1036C22C1/1005C22C1/1047
Inventor 范国强
Owner 广州埃米石墨烯科技有限公司
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