SiC particle-containing magnesium alloy high in elastic modulus and preparation method of magnesium alloy

A particle and intermediate alloy technology, applied in the field of high elastic modulus magnesium matrix composite materials, can solve the problems of poor resistance to elastic deformation, low elastic modulus of alloys, and low elastic modulus, and achieve good plasticity and high elastic modulus. , The effect of processing and manufacturing is easy

Active Publication Date: 2014-10-08
BAIC MOTOR CORP LTD
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  • Application Information

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Problems solved by technology

Unfortunately, Mg in Mg-Al, Mg-Zn and Mg-Al-Zn alloys 17 Al 12 (47.4GPa) and MgZn 2 (44.8GPa) and other phases have relatively low elastic modulus, so that the elastic modulus of the alloy is also relatively low, only 40-45GPa, which event

Method used

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  • SiC particle-containing magnesium alloy high in elastic modulus and preparation method of magnesium alloy
  • SiC particle-containing magnesium alloy high in elastic modulus and preparation method of magnesium alloy
  • SiC particle-containing magnesium alloy high in elastic modulus and preparation method of magnesium alloy

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preparation example Construction

[0091] According to the present invention, a method for preparing the above-mentioned high elastic modulus magnesium-based composite material is further provided, comprising the following steps:

[0092] 1) Drill holes on the pure magnesium ingot, the diameter of the holes is 2.0-2.5cm; carry out surface modification treatment on SiC particles, put them into the holes after drying to obtain β-SiC p Granular pure magnesium ingot;

[0093] 2) Melting and casting: Put the pure magnesium ingot with SiC particles into an iron crucible and heat it to 700-720°C under the protective atmosphere of Ar gas. 740°C, then add the remaining components and stir to control the complete melting of the master alloy until the casting time is less than or equal to 3 minutes, refining and removing slag, and casting to obtain an ingot.

[0094] In the above method, each component is selected according to the designed high-modulus magnesium-based composite material component distribution ratio. In t...

Embodiment 1

[0099] Embodiment 1, preparation and performance identification of magnesium-based composite material of the present invention

[0100] In the examples of the present invention, composite materials were prepared respectively according to the component distribution ratios shown in Table 1-Table 4, and the specific preparation methods are as follows:

[0101] 1. Take each component according to the designed high elastic modulus magnesium-based composite component distribution ratio, among which: Mg is added in the form of pure magnesium, and SiC particles are added in the form of β-SiC p Add in the form of particles (with a particle size of 1.0-20 μm), Zn is added in the form of pure zinc, and the rest of the components are added in the form of magnesium-based master alloys;

[0102] 2. Drill holes on pure magnesium ingots, the diameter of the holes is 2.0-2.5cm; for β-SiC p The particles were subjected to surface modification treatment, dried and put into the holes; the surfac...

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Abstract

The invention provides a SiC particle-containing magnesium-based composite material high in elastic modulus. The SiC particle-containing magnesium-based composite material comprises the following components in percentage by weight: 1.0-10.0% of aluminum and/or zinc, 1.0-15.0% of SiC and the balance of magnesium, wherein the sum of percentages by weight of the components is 100%; the alloy element comprises aluminum and/or zinc. A preparation method of the SiC particle-containing magnesium-based composite material comprises the following steps: punching holes in a pure magnesium ingot, adding SiC particles subjected to surface modification and drying into the holes, heating and melting pure magnesium under the protective atmosphere, stirring and then quickly raising the temperature again, adding intermediate alloys of the other components and stirring, controlling the time for fully melting the intermediate alloys till the casting time is shorter than or equal to 3 minutes, refining and slagging, casting to obtain a cast ingot. The SiC particle-containing magnesium-based composite material is reasonable in ratio of components, easy to process and manufacture and low in cost; the prepared magnesium-based composite material is high in room temperature strength and elastic modulus and good in plasticity; the comprehensive performance of the magnesium-based composite material is apparently higher than that of the existing ordinary magnesium alloy; the magnesium-based composite material is suitable for industrialized production.

Description

technical field [0001] The invention relates to a magnesium-based composite material with high elastic modulus containing SiC particles, and the elastic modulus of the alloy can reach 50-70GPa. It belongs to the field of non-ferrous metal materials and their processing. Background technique [0002] In order to achieve the purpose of reducing weight and increasing efficiency, the demand for high-performance lightweight materials in the automotive industry is growing rapidly. Magnesium alloy materials, as the lightest metal structural materials that can be industrially produced, have received special attention. In recent years, the speed of aerospace and transportation vehicles is getting higher and higher, and the power required is increasing, which puts forward higher requirements for the heat resistance and elastic deformation resistance of materials. Alloying is an effective means to improve the mechanical properties of alloys. SiC particles have high elastic modulus (3...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/02C22C23/04C22C32/00C22F1/06
Inventor 胡继龙
Owner BAIC MOTOR CORP LTD
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