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Method for preparing porous magnesium alloy

A technology of porous magnesium and alloy, applied in the field of preparation of porous magnesium alloy, can solve the problems of low success rate of porous magnesium alloy, high specific stiffness, high specific strength, complicated preparation process, etc., and achieves strong corrosion resistance and labor saving. And the cost, the effect of simple process operation

Pending Publication Date: 2016-03-02
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is worth noting that porous magnesium alloys have high specific stiffness, high specific strength, shock absorption, and electromagnetic shielding capabilities that are unmatched by other porous metal materials.
The equipment and process for preparing porous magnesium alloys by fusion method are relatively simple, but the success rate of porous magnesium alloys is not high due to unstable foaming. The present invention continuously improves the problems encountered in the preparation process of porous magnesium alloys through a large number of experiments, and develops a Mature method for preparing foamed magnesium alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] This implementation example is a porous magnesium alloy, its composition Mg97Zn1Y2, adding 1.5%MgCO 3˙ 10H 2 O, add 1.5% SiC tackifier.

[0012] The concrete preparation method of this embodiment is:

[0013] Melt the Mg97Zn1Y2 master alloy at 700°C and keep it warm for 10 minutes, then add 1.5% blowing agent MgCO at a temperature of 650°C 3˙ 10H 2 O is incubated for 5 minutes for foaming treatment and at the same time stirred evenly for 2 minutes at a speed of 500r / min, and then injected into the sand mold cavity. The porous magnesium alloy obtained by this treatment method, after many tests, found that the average damping Q-1=0.05 of the sample is much higher than the standard Q-1=0.01 currently used to define the damping value of high-damping materials, and its hardness can be Up to 60HV, density 1.7g / cm 3 .

Embodiment 2

[0015] This implementation example is a porous magnesium alloy, its composition is Mg97Zn1Y2, adding 2% MgCO 3˙ 10H 2 O and 10% SiC.

[0016] The concrete preparation method of this embodiment is:

[0017] Melt the Mg97Zn1Y2 master alloy at 700°C and keep it warm for 10 minutes, then add 3% blowing agent MgCO at a temperature of 600°C 3˙ 10H 2 O is incubated for 3 minutes and foamed, and at the same time, stirred evenly at a speed of 800r / min for 7 minutes, and then injected into the cavity of the sand mold. The porous magnesium alloy obtained by this treatment method, after many tests, found that the average damping Q-1=0.07 of the sample is much higher than the standard Q-1=0.01, which is now used to define the damping value of high-damping materials, and its hardness Up to 55HV, density 1.65g / cm 3 .

Embodiment 3

[0019] This implementation example is a porous magnesium alloy, its composition is Mg97Zn1Y2, adding 3% blowing agent MgCO 3˙ 10H 2 O and 10% SiC.

[0020] The concrete preparation method of this embodiment is:

[0021] Melt the Mg97Zn1Y2 master alloy at 700°C and keep it warm for 10 minutes, then add 2% blowing agent MgCO at a temperature of 550°C 3˙ 10H 2 O heat-preserved for 2 minutes to perform foaming treatment and at the same time stir evenly at a speed of 1000r / min for 8 minutes, and then inject into the sand mold cavity. The porous magnesium alloy obtained by this treatment method, after many tests, found that the average damping Q-1=0.09 of the sample is much higher than the standard Q-1=0.01 currently used to define the damping value of high-damping materials, and its hardness can be Up to 50HV, the density is 1.6g / .

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Abstract

The invention discloses a method for preparing a porous magnesium alloy. According to the method, the problem likely to be generated in the porous magnesium alloy preparation process is solved, and the method comprises the specific operating steps that a certain amount of foaming agent and tackifier are added in the alloy smelting process, foaming is carried out at certain temperature, and even stirring is carried out; and finally the mixture is injected into a sand mould cavity, and the porous magnesium alloy with ideal pore quality can be obtained. Compared with other light alloy, the specific stiffness and specific strength of the porous magnesium alloy are high, shock absorption performance and electromagnetic shielding capacity are better, and meanwhile the excellent performance of foam metal is achieved. Wide application of the porous magnesium alloy to the fields of aviation, aerospace, automobiles, bioengineering and the like can be further promoted.

Description

technical field [0001] The invention relates to a new material forming technology, in particular to a preparation method of a porous magnesium alloy. Background technique [0002] Porous metal materials combined with metal phase and gas phase have the advantages of low density, large specific surface area, good sound absorption, heat insulation, shock absorption, and electromagnetic shielding performance, and have broad application prospects in aerospace, automobile, construction and other fields. It is worth noting that porous magnesium alloy has high specific stiffness, high specific strength, shock absorption, and electromagnetic shielding ability that are unmatched by other porous metal materials. It has attracted much attention in recent years, but it has not been mass-produced due to the complicated preparation process. The equipment and process for preparing porous magnesium alloys by fusion method are relatively simple, but the success rate of porous magnesium alloys...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/08
CPCC22C1/08C22C23/06C22C1/083
Inventor 万迪庆刘雅娟叶舒婷
Owner EAST CHINA JIAOTONG UNIVERSITY
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