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Method for preparing in-situ particle reinforced magnesium base compound material

A particle-reinforced and composite material technology is applied in the field of in-situ particle-reinforced magnesium-based composite material preparation. , to avoid the effect of limited size

Active Publication Date: 2009-03-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method of stirring the melt alone cannot refine the reinforcement phase, and the distribution of the reinforcement phase in the matrix is ​​not uniform, so this preparation method has certain limitations.

Method used

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  • Method for preparing in-situ particle reinforced magnesium base compound material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] at 3vol.%SF 6 +97vol.%CO 2 Under the condition of mixed gas protection, the AZ91D alloy ingot (80wt.%) was completely melted at 680°C, and then the Al-Si master alloy (20wt.%) was pressed into the melt, and then the temperature was raised to 700°C, and Keep warm for 20 minutes, insert an ultrasonic probe into the melt for processing, set the ultrasonic power to 2KW, and continue processing for 5 minutes. Finally remove the scum on the surface and cast it in a metal mold to get 11vol% Mg after solidification 2 Si / AZ91D composite material. The obtained in situ Mg 2 The microstructure photos of Si particle reinforced magnesium matrix composites are as follows: figure 1 , the tensile strength at room temperature is 230MPa, and the tensile strength at 150°C is 202MPa.

Embodiment 2

[0022] at 2vol.%SF 6 +98vol.%CO 2 Under the condition of mixed gas protection, the AZ91D alloy ingot (85wt.%) was completely melted at 700°C, and then the Al-Si master alloy (15wt.%) was pressed into the melt, and then the temperature was raised to 720°C, and Keep warm for 15 minutes, insert an ultrasonic probe into the melt for processing, set the ultrasonic power to 1.6KW, and continue processing for 8 minutes. Finally remove the scum on the surface and cast it in a metal mold to get 8vol% Mg after solidification 2 Si / AZ91D composite, the resulting Mg 2 The room temperature tensile strength of the Si particle reinforced magnesium matrix composite is 215MPa, and the tensile strength at 150℃ is 188MPa.

Embodiment 3

[0024] at 1vol.% SF 6 +99vol.% CO 2 Under the condition of mixed gas protection, the AZ91D alloy ingot (90wt.%) was completely melted at 720°C, and then the Al-Si master alloy (10wt.%) was pressed into the melt, and then the temperature was raised to 740°C, and Keep warm for 10 minutes, insert an ultrasonic probe into the melt for processing, set the ultrasonic power to 0.4KW, and continue processing for 15 minutes. Finally remove the scum on the surface and cast it in a metal mold to get 5vol% Mg after solidification 2 Si / AZ91D composite, the resulting Mg 2 The tensile strength of Si particle reinforced magnesium matrix composite is 208MPa at room temperature and 175MPa at 150℃.

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Abstract

The invention relates to a method for preparing in-situ particle reinforced magnesia-based composite materials, which particularly comprises the following steps: magnesium aluminum alloy raw materials are completely smelt under the protective condition of gas mixture of SF6 and CO2; aluminum-silicon intermediate alloy is pressed into a magnesium aluminum fused mass, and the temperature is raised and maintained, so as to guarantee complete reaction between silicon and magnesium in the magnesium aluminum alloy fused mass, and simultaneously an ultrasonic probe is inserted into the fused mass for treatment; and after the treatment is finished, surface scum is removed and the fused mass is cast into a metal die, and the in-situ Mg2Si particle reinforced magnesia-based composite materials are obtained. The method has the characteristics of good interference compatibility of Mg2Si particles and substrates, controllable particle size of reinforced phases, uniform distribution of the reinforced phase and so on; and the magnesia-based composite materials prepared have good mechanical property.

Description

technical field [0001] The invention relates to a method for preparing an in-situ particle reinforced magnesium-based composite material, in particular to a method for preparing an in-situ particle-reinforced magnesium-based composite material by using a sonochemical method. Background technique [0002] In recent years, due to concerns about the environment, energy and other issues, research on magnesium-based composites has become a hot spot in the field of materials. Magnesium-based composite materials have high specific strength, specific stiffness, good castability and dimensional stability, good resistance to electromagnetic interference and shielding, good damping performance, good vibration reduction performance, little impact on the environment, and no pollution. The waste recycling rate is as high as 85%, so it has wide application prospects in aerospace, automobile, computer, network, communication and other fields. At present, the preparation of magnesium-based ...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/00
Inventor 赵玉涛陈刚徐云龙张松利
Owner JIANGSU UNIV
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