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Nanometer SiC particle-reinforced magnesium-based composite board and preparation method thereof

A particle-reinforced, composite plate technology, applied in the field of magnesium-based composite material preparation, can solve problems such as low wear resistance, low strength and toughness, and achieve the effects of reducing casting defects, good plasticity, and improved strength

Active Publication Date: 2020-04-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical purpose of the present invention is to provide a nano-SiC particle-reinforced magnesium-based composite plate and its preparation method to solve the problems of low strength and toughness and low wear resistance of the magnesium-based composite material. The nano-SiC particle-reinforced magnesium alloy prepared by the present invention can benefit Utilizing the unique size effect and isotropy of nano silicon carbide particles, it will not significantly damage the plasticity of the composite material, not only improve the strength of the composite material, but also make it have good wear resistance

Method used

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  • Nanometer SiC particle-reinforced magnesium-based composite board and preparation method thereof
  • Nanometer SiC particle-reinforced magnesium-based composite board and preparation method thereof
  • Nanometer SiC particle-reinforced magnesium-based composite board and preparation method thereof

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Embodiment 1

[0032] The technique of preparing the preparation method of the nano-SiC particle reinforced magnesium-based composite plate in this example mode is carried out in the following steps:

[0033] Step 1. Put the magnesium alloy ingot into the stainless steel mold placed in the resistance furnace, and raise the temperature of the resistance furnace to the melting temperature of the magnesium alloy, wait until it is completely melted, and then cool the temperature of the melt to the semi-solid stirring temperature ; The purity of Mg is not less than 99.98wt.%, the purity of Al is not less than 99.96wt.%, and the purity of Zn is not less than 99.95wt.%. It is prepared into Mg-2.7Al-0.8Zn;

[0034] Step 2. Slowly introduce the stirring paddle into the semi-solid melt, and start the electric stirring device. When the melt surface generates a vortex with a certain size and depth, quickly and evenly inject the preheated nano-SiC particles, and then follow a certain stirring Stirring at...

Embodiment 2

[0049] The process of preparing nano-SiC particle reinforced AZ31B magnesium-based composite material in this example is carried out in the following steps:

[0050] Step 1. Put the AZ31B magnesium alloy ingot into the stainless steel mold placed in the resistance furnace, and raise the temperature of the resistance furnace to 720±5°C. After the AZ31B magnesium alloy ingot is completely melted, lower its temperature to a semi-solid temperature of 615°C ±15°C, a semi-solid solution is obtained;

[0051] Step 2. Insert the stirring paddle into the semi-solid melt obtained in step 1, start the stirring device, and start to rotate the stirring paddle. When a 2cm deep vortex is generated at the liquid surface of the melt, preheat the nano-SiC particles at 660±10°C Introduce into the melt, and stir the mixture composed of nano-SiC particles and semi-solid melt to obtain a semi-solid mixture with uniform distribution of nano-SiC particles;

[0052] Step 3. Raise the temperature of t...

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Abstract

The invention discloses a nanometer SiC particle-reinforced magnesium-based composite board and a preparation method thereof. The preparation method comprises the following steps: heating a magnesiumalloy ingot to a melting state, cooling the melt to a semi-solid stirring temperature, stirring the semi-solid melt, injecting preheated nanometer SiC particles, heating the mixture to an alloy melting temperature again, carrying out ultrasonic oscillation treatment, carrying out pressure solidification under the action of a hydraulic press to obtain a composite material cast ingot, carrying out homogenization treatment on the composite material cast ingot, and then carrying out rolling treatment on the composite material according to the specified rolling reduction and rolling frequency to obtain a composite material rolled plate. The materials used in the method and the processing method belong to low-cost manufacture, mass production is easy, the problems of the magnesium alloy has poorwear resistance and strength and toughness inversion are solved, and the magnesium-based composite plate with excellent wear resistance is prepared from the magnesium alloy as a matrix and nanometersilicon carbide particles as reinforcements through a stirring casting composite rolling technology.

Description

technical field [0001] The invention belongs to the technical field of magnesium-based composite material preparation, and in particular relates to a nano-SiC particle-reinforced magnesium-based composite plate and a preparation method thereof. Background technique [0002] As an energy-saving and lightweight metal material, magnesium alloy combines the advantages of low density, high fuel efficiency, high specific strength, and good recyclability, which has caused a great research boom in the aerospace and automotive fields. However, magnesium alloys have relatively low strength and poor wear resistance, which seriously limit their further development and application in emerging fields. The AZ31 alloy contains Mg-2.7Al-0.8Zn (composition expressed in wt.%), and belongs to the most commercially valuable and widely used magnesium alloy. Generally, AZ31 alloy is not suitable as a gear, bearing or sliding sealing material, but as a part of auto parts, magnesium alloy is inevit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C23/02C22C32/00C22F1/06
CPCC22C1/1036C22C23/02C22C32/0063C22F1/06C22C1/12C22C1/1073
Inventor 沈明杰朱小倩李云帅
Owner SHAANXI UNIV OF SCI & TECH
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