Preparation method of carbon nanotube reinforced aluminum alloy semi-solid slurry

A semi-solid slurry and carbon nanotube technology, which is applied in the field of metal material manufacturing, can solve the problems of metal melt contamination and corrosion, magnetic flux leakage, expensive stirring equipment, etc., and achieves uniform secondary phase distribution, safe operation, and good bonding. Effect

Active Publication Date: 2021-06-11
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the mechanical stirring method has the following disadvantages: the molten metal is easily polluted and corroded by the stirrer, and there is a blind zone of stirring, resulting in insufficient uniformity of the slurry, and the stirring process is easy to get involved in gas and inclusions, which in turn affects the quality of the semi-solid billet
Among them, the electromagnetic stirring method has the following disadvantages: the stirring equipment is relatively expensive, the electromagnetic gap of the device is large,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing carbon nanotube reinforced aluminum alloy semi-solid slurry, comprising the following steps:

[0031] (1) Mix an appropriate amount of carbon nanotubes with an outer diameter of 20-60nm, a length of 10-30μm, and a purity of ≥99.5% with absolute ethanol in a beaker, mixing 3.0g of carbon nanotubes per 100ml of ethanol, and then put them into an ultrasonic Perform ultrasonic dispersion treatment in the instrument for 120min, the ultrasonic power is 450W, and the frequency is 40kHz; the purity is ≥99.9%, the particle size is 100-200 mesh aluminum powder, potassium tetrafluoroaluminate powder and absolute ethanol are mixed in a beaker at a rate of 150ml of ethanol 45g of aluminum powder and 3.0g of potassium tetrafluoroaluminate were mixed by mechanical stirring for 120min at a stirring speed of 120r / min; then, the mixed and dispersed aluminum powder-tetrafluoroaluminate was evenly added to the carbon nanotube ethanol dispersion after ultrasonic Conti...

Embodiment 2

[0039] A method for preparing carbon nanotube reinforced aluminum alloy semi-solid slurry, comprising the following steps:

[0040] (1) Mix an appropriate amount of carbon nanotubes with an outer diameter of 20-60nm, a length of 10-30μm, and a purity of ≥99.5% with absolute ethanol in a beaker, mixing 2.5g of carbon nanotubes per 100ml of ethanol, and then put them into an ultrasonic Perform ultrasonic dispersion treatment in the instrument for 100min, the ultrasonic power is 400W, and the frequency is 35kHz; the purity ≥ 99.9%, the particle size is 100-200 mesh aluminum powder, potassium tetrafluoroaluminate powder and absolute ethanol in a beaker at a rate of 150ml of ethanol solution Mix 40g of aluminum powder and 2.5g of potassium tetrafluoroaluminate for 100min by mechanical stirring at a stirring speed of 100r / min; then add the mixed and dispersed aluminum powder-tetrafluoroaluminum evenly into the carbon nanotube ethanol dispersion after ultrasonic Continue to ultrasoni...

Embodiment 3

[0048] A method for preparing carbon nanotube reinforced aluminum alloy semi-solid slurry, comprising the following steps:

[0049] (1) Mix an appropriate amount of carbon nanotubes with an outer diameter of 20-60nm, a length of 10-30μm, and a purity of ≥99.5% with absolute ethanol in a beaker with 3.5g of carbon nanotubes per 100ml of ethanol, and then put them into an ultrasonic Perform ultrasonic dispersion treatment in the instrument for 150min, the ultrasonic power is 480W, and the frequency is 45kHz; the purity ≥ 99.9%, the particle size is 100-200 mesh aluminum powder, potassium tetrafluoroaluminate powder and absolute ethanol are mixed in a beaker at a rate of 150ml of ethanol 50g of aluminum powder and 3.5g of potassium tetrafluoroaluminate were mixed by mechanical stirring for 150min at a stirring speed of 140r / min; then, the mixed and dispersed aluminum powder-tetrafluoroaluminate was evenly added to the carbon nanotube ethanol dispersion after ultrasonic Continue t...

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PUM

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Abstract

The invention provides a preparation method of carbon nanotube reinforced aluminum alloy semi-solid slurry, and belongs to the technical field of metal material manufacturing. The preparation method of the carbon nanotube reinforced aluminum alloy semi-solid slurry comprises the following steps of under the casting condition, enabling Al-Mg-Si alloy to be refined and subjected to slag removal, pressing an Al-CNTs-KAlF4 intermediate precast block into an alloy melt through a bell jar in the argon protection state, applying 2.1-3.2 kW high-energy ultrasound in the adding process, then rapidly reducing the temperature to 610-650 DEG C, performing heat preservation, performing short-time secondary high-energy ultrasonic treatment, then performing rapid water quenching, and finally preparing a semi-solid structure which is uniformly spheroidized under an optimal process condition. The preparation method is safe to operate and stable in process, the structure of the prepared semi-solid slurry is obviously refined compared with the structure of a matrix without an intermediate precast block under the original same condition, the interface bonding of the carbon nanotubes and the alloy matrix is good, and the distribution of a secondary phase is more uniform.

Description

technical field [0001] The invention belongs to the technical field of metal material manufacture, and in particular relates to a preparation method of carbon nanotube reinforced aluminum alloy semi-solid slurry. Background technique [0002] In recent years, a green and low-carbon lifestyle has been vigorously advocated, and scientific exploration is also trying to find a breakthrough in green development. At present, cars are becoming more and more personalized, and additional devices further increase the weight of the car body. Therefore, lightweight parts are an inevitable choice for car companies to achieve the goals of reducing body weight and exhaust emissions. For this reason, more and more body parts are gradually replaced by aluminum alloy parts, such as cylinder blocks, cylinder heads, wheels, transmission housings and other shell parts, as well as body panels such as doors, engine covers, and roof covers. However, pure aluminum alloy sometimes cannot fully meet ...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C21/08C22C32/00
CPCC22C1/1015C22C1/1036C22C21/08C22C26/00C22C2026/002C22C2026/008C22C1/12
Inventor 闫洪刘智彬熊俊杰
Owner NANCHANG UNIV
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