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Method for preparing high-damping Mg2Si/Mg-9Al-Y composite material

A composite material and high damping technology, applied in the field of metal materials, can solve the problems of complex operation and difficult application, and achieve the effects of simple and easy preparation method, good thermal resistance and high vibration damping ability

Inactive Publication Date: 2007-09-12
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to apply in industry because of the complexity of the method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Under the condition of gas protection, add 1.0wt.% Si, 0.6wt.% Y and 0.3% RE after pure magnesium and pure aluminum are completely melted at 700°C, Si, Y and RE and Al-20Si, Mg- Add in the form of 17Y and Al-10RE master alloy, stir for 30 minutes after melting, and the stirring speed is 200r / min. Finally, industrial pure antimony is added, and the amount of antimony added is 0.5wt.%. Adding method: Wrap metal antimony with aluminum foil first, then dry the water in an oven at 200°C, quickly press it below the liquid surface with a bell jar and keep it warm for about 10 minutes, then raise the temperature to 750°C to refine the alloy liquid and let it stand After 20 minutes, remove the scum on the surface and cast it in a metal mold. Wire cut the resulting composite into 40 x 5 x 1mm 3 , measured by DMTA at a strain amplitude of 10 -6 to 10 -4 The damping value Tanφ within the range, the results are shown in the table below.

Embodiment 2

[0016] Under the condition of gas protection, add 2.0wt.% Si, 0.7wt.% Y and 0.3% RE after pure magnesium and pure aluminum are completely melted at 720°C, Si, Y and RE and Al-20Si, Mg- Add in the form of 17Y and Al-10RE master alloy, stir for 30 minutes after melting, and the stirring speed is 600r / min. Finally, industrial pure antimony is added, and the amount of antimony added is 0.5wt.%. Adding method: Wrap the metal antimony with aluminum foil first, then dry the water in an oven at 200°C, quickly press it under the liquid surface with a bell jar and keep it warm for about 15 minutes, then raise the temperature to 750°C to refine the alloy liquid and let it stand After 20 minutes, remove the scum on the surface and cast it in a metal mold. Wire cut the resulting composite into 40 x 5 x 1mm 3 , measured by DMTA at a strain amplitude of 10 -6 to 10 -4 The damping value within the range, the results are shown in the table below.

Embodiment 3

[0018] Tanφ(×10 3 )

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PUM

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Abstract

The invention relates the method for preparation of Mg2Si / Mg-9Al-Y highly damped material. The highly damped magnesium base composite material comprises 6-10wt% Al, 1-5wt% Si, 0.4-1wt% Y, 0.1-0.8wt% RE, 0.5-0.6wt% Sb, less than 0.1wt% impurity element(Fe, Ni, Na, K), and Mg. The method comprises the following steps: 1 dissolving the pure magnesium and pure aluminium; 2 adding the hardener of Al-20Si, Mg-17Y and Al-10RE , melting and stirring; 3 adding the metallic antimony, and rising the temperature, refining, and entering the alloy liquid into metal mold. The composite possesses the good damping capacity and mechanics capacity, simple method and widely application in car industry.

Description

technical field [0001] The invention relates to a method in the technical field of metal materials, in particular to a Mg 2 The preparation method of Si / Mg-9Al-Y high damping material. Background technique [0002] Among the existing engineering metals, magnesium alloy has the smallest density. Although the strength and elastic modulus of magnesium alloy are lower than those of aluminum alloy and alloy steel, its specific strength is significantly higher than that of aluminum alloy and steel, and its specific stiffness is roughly the same as that of aluminum alloy and steel. Magnesium alloys, which have the same stiffness as aluminum alloys, are about 25% lighter. Magnesium alloys also have good damping characteristics, and the amount of vibration reduction under various pressures is much higher than that of aluminum alloys and cast iron. The above advantages enable magnesium alloys to reduce noise and improve sealing when used as shell components; when used for seats, st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C23/02
Inventor 廖利华王浩伟李险峰马乃恒张修庆
Owner SHANGHAI JIAOTONG UNIV