Method for preparing SiCp/AZ61 magnesium-based nano composite material using ultrasonic wave

A nano-composite material and ultrasonic technology, which is applied in the field of metal material preparation, can solve the problems of complex process, difficult and uniform distribution of reinforcing phases, and high cost, and achieve the effects of simple preparation process, no pollution of three wastes, and high ductility.

Inactive Publication Date: 2009-09-16
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The powder metallurgy method has the problems of complex process, high cost, and difficulty in manufacturing large-sized and complex parts, and the stirred casting method also has the problem that the reinforcing phase is difficult to distribute uniformly.

Method used

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  • Method for preparing SiCp/AZ61 magnesium-based nano composite material using ultrasonic wave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First, add the nano-SiC powder into the ethanol solution for ultrasonic dispersion pretreatment, then dry and grind the pretreatment mixed solution; put the AZ61 magnesium alloy into the crucible and heat it to melt, and keep it warm at 640°C. Extend the horn below the surface of the melt, and ultrasonicate for 5 minutes under the ultrasonic power of 650W; wrap the pretreated nano-SiC powder with 0.5% by mass percentage with tin foil, and add it to the AZ61 magnesium alloy melt In vivo, ultrasonic treatment for 15 minutes, casting sampling.

[0013] In this example, the tensile strength of the nano-SiC particle-reinforced AZ61 magnesium-based composite material reaches 295 MPa, which is 13.5% higher than that of the matrix, its Vickers hardness reaches 61.2, and the elongation rate is 13.8%.

Embodiment 2

[0015] First, add the nano-SiC powder into the ethanol solution for ultrasonic dispersion pretreatment, and then dry and grind the pretreatment mixed solution; put the AZ61 magnesium alloy into the crucible and heat it to melt, and keep it warm at 650°C. Extend the horn below the surface of the melt, and ultrasonicate for 10 minutes under 600W ultrasonic power; wrap the pretreated nano-SiC powder with 1.0% by mass percentage of tin foil, and add it to the AZ61 magnesium alloy melt In vivo, ultrasonic treatment for 20 minutes, casting sampling.

[0016] In this embodiment, the tensile strength of the AZ61 magnesium-based composite material reinforced with nano-SiC particles reaches 325 MPa, which is 25% higher than that of the matrix, and its Vickers hardness reaches 70.4. , and the elongation was 13.4%.

Embodiment 3

[0018] First, add the nano-SiC powder into the ethanol solution for ultrasonic dispersion pretreatment, then dry and grind the pretreatment mixed solution; put the AZ61 magnesium alloy into the crucible and heat it to melt, and keep it warm at 645°C. Extend the horn below the surface of the melt, and ultrasonicate for 8 minutes under the ultrasonic power of 600W; wrap the pretreated nano-SiC powder with 1.5% by mass percentage with tin foil, and add it to the AZ61 magnesium alloy melt In vivo, ultrasonic treatment for 18 minutes, casting samples.

[0019] In this example, the tensile strength of the nano-SiC particle reinforced Az61 magnesium-based composite material reaches 316MPa, which is 21.5% higher than that of the matrix; its Vickers hardness reaches 74.6. , the elongation rate was 13.1%. .

[0020] From the dispersion of nano-SiC particles in AZ61 magnesium alloy in Figure 1, it can be seen that due to the different electrical conductivity of SiC and magnesium alloy,...

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Abstract

The invention relates to a method for preparing SiCp / AZ61 magnesium-based nano composite material using ultrasonic wave, belonging to the metal material preparation field, comprising the following steps: adding nano SiC powder into alcohol solution and performing ultra sonic dispersion pretreatment of the mixture, drying and grinding the pretreated mixture; heating the AZ61 magnesium alloy into a crucible to melt, and insulating the crucible at temperature rang of 640 DEG C -650 DEG C, making an amplitude transformer under the melted mixture surface and performing ultrasonic treatment of the mixture at 600W-650W for 5-10 minutes; cladding the pretreated nano SiC powder according to the weight percent of 0.1-2.0% by the tinfoil, adding the clad SiC powder into the AZ 61 magnesium alloy melt mass, continuously performing ultrasonic treatment of the mixture at 600W-650W for 15-20 minutes; casting and sampling the mixture. The nano SiC granules has uniform dispersion in matrix, increased tensile strength by 13.5-25%, increased Vickers hardness by 16.8-42.4%, higher ductility of matrix, simple preparation technology, safety, reliability and no three-waste pollution.

Description

technical field [0001] The invention belongs to the field of metal material preparation, in particular to a method for preparing magnesium-based nanocomposite materials by ultrasonic waves. Background technique [0002] Magnesium-based composite materials have high specific strength, specific stiffness, damping performance, wear resistance and high temperature resistance, so they have good application prospects in high-tech fields such as aerospace and automobiles where the demand for lightweight and high-strength materials is urgent. Compared with continuous fiber-reinforced phase, discontinuously reinforced metal matrix composites, especially particle-reinforced metal matrix composites, have the characteristics of low cost and simple preparation process, and have attracted people's attention. Generally speaking, micron-sized reinforcing particles are mainly used to improve the strength and hardness of magnesium alloys. However, when the content of reinforcing particles is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C23/02
Inventor 闫洪胡志
Owner NANCHANG UNIV
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