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A kind of foam magnesium sandwich panel and semi-solid thixotropic seepage casting method

A technology of sandwich panels and foamed magnesium, which is applied in the field of preparation of porous metal materials, can solve problems such as high chemical activity and difficulties, and achieve the goals of improving mechanical properties, improving safety, high compressive/tensile strength and bonding strength Effect

Active Publication Date: 2019-04-30
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are basically no literature reports on the research and development of foamed magnesium alloy sandwich panel materials at home and abroad. Due to the higher chemical activity of metal magnesium than metal aluminum and its easy combustion and oxidation, these unfavorable factors make the preparation of foamed magnesium alloy sandwich panels difficult. Materials are much more difficult than the preparation of foamed aluminum alloy sandwich panel materials, so it is necessary to develop a foamed magnesium alloy sandwich panel material preparation technology suitable for the characteristics of magnesium alloys

Method used

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  • A kind of foam magnesium sandwich panel and semi-solid thixotropic seepage casting method
  • A kind of foam magnesium sandwich panel and semi-solid thixotropic seepage casting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, a semi-solid thixotropic seepage casting method for a magnesium foam sandwich panel, which comprises the following steps:

[0034] 1) Preparing the billet, machining the non-dendritic AZ91 magnesium alloy ingot into two billets, the billet is a cylinder with a diameter of 50 mm and a height of 15 mm; the weight ratio of the components of the AZ91 magnesium alloy is: Al: 8.3 ~9.7%, Zn: 0.35~1.0%, Mn: 0.15~0.5%, Si:<0.01%, Cu:<0.03%, Ni:<0.002%; Fe:<0.005%, the rest is Mg;

[0035] 2) Prepare prefabricated blocks, pre-dehydrate NaCl particles with a particle size of 5-12 meshes, and then place the treated NaCl particles in a prefabricated block mold to make a prefabricated block. The prefabricated block is 50 mm in diameter, A cylinder with a height of 10mm;

[0036] 3) Prepare the non-dendritic magnesium alloy semi-solid slurry, put the billet and the prefabricated block into the percolation mold, separate the two billets with the prefabricated block, then...

Embodiment 2

[0039] Embodiment 2, a semi-solid thixotropic seepage casting method for a magnesium foam sandwich panel, which comprises the following steps:

[0040] 1) Preparing billets, mechanically processing semi-non-dendritic AZ61 magnesium alloy ingots into two billets, the billets are cylinders with a diameter of 50 mm and a height of 15 mm; wherein the weight ratio of the components of the AZ61 magnesium alloy is: Al: 5.6~6.5%, Zn: 0.35~1.0%, Mn: 0.15~0.5%, Si:<0.01%, Cu:<0.03%, Ni:<0.002%, Fe:<0.005%, and the rest is Mg;

[0041] 2) Prepare prefabricated blocks, pre-dehydrate NaCl particles with a particle size of 5-12 meshes, and then place the treated NaCl particles in a prefabricated block mold to make a prefabricated block. The prefabricated block is 50 mm in diameter, A cylinder with a height of 10mm;

[0042] 3) Prepare the non-dendritic magnesium alloy semi-solid slurry, put the billet and the prefabricated block into the percolation mold, separate the two billets with the ...

Embodiment 3

[0045] Embodiment three, a semi-solid thixotropic seepage casting method for a magnesium foam sandwich panel, which comprises the following steps:

[0046] 1) Preparing blanks, machining non-dendritic ZA84 magnesium alloy ingots into two blanks, the blanks are cylinders with a diameter of 50 mm and a height of 15 mm; the weight ratio of the components of the AZ84 magnesium alloy is: Zn: 7.4 ~8.2%, Al: 3.6~4.5%, Mn: 0.15~0.40%, Si: <0.01%, Cu: <0.03%, Ni: <0.002%, Fe: <0.005%, and the rest is Mg.

[0047] 2) Prepare prefabricated blocks, pre-dehydrate NaCl particles with a particle size of 5-12 meshes, and then place the treated NaCl particles in a prefabricated block mold to make a prefabricated block. The prefabricated block is 50 mm in diameter, A cylinder with a height of 10mm;

[0048] 3) Prepare the non-dendritic magnesium alloy semi-solid slurry, put the billet and the prefabricated block into the percolation mold, separate the two billets with the prefabricated block, ...

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Abstract

The invention discloses a foamed magnesium sandwich board and a semi-solid thixotropic infiltration casting method thereof. The method comprises the following steps that 1), a non-dendritic structuremagnesium alloy ingot is mechanically machined into two blanks; 2), soluble salt particles are subjected to pre-dewatering treatment, and then the soluble salt particles are placed into a precast block mold to be compacted into a precast block; 3), the blanks and the precast block are put into an infiltration mold, the two blanks are separated through the precast block, heating is conducted till the temperature is within a magnesium alloy semi-solid temperature interval, heat preservation is conducted, and then a non-dendritic structure magnesium alloy semi-solid slurry is obtained; 4), infiltration is conducted, the non-dendritic structure magnesium alloy semi-solid slurry is subjected to thixotropy to infiltrate into pores of the precast block through applied pressure and then cooled andsolidified, and then a magnesium alloy / soluble salt particle complex is obtained; and 5), the soluble salt particles in the complex are dissolved, and the foamed magnesium sandwich board is obtained.The foamed magnesium sandwich board which is controllable in thickness and uniform in structure is formed at a time by means of the semi-solid thixotropic infiltration casting method, and a middle core layer and metal panels are of an integral structure.

Description

technical field [0001] The invention relates to the field of preparation of porous metal materials, in particular to a foamed magnesium sandwich panel and a semi-solid thixotropic seepage casting method thereof. Background technique [0002] The metal foam sandwich panel material is a kind of layered porous metal material made of a metal foam core layer and a dense metal panel. The metal foam sandwich panel material has excellent comprehensive properties such as low specific gravity, high specific stiffness, impact resistance, good vibration damping performance, and electromagnetic shielding, so it has broad application prospects in the fields of automobiles, rail trains, construction, electronics, and national defense. It can meet the urgent needs of lightweight and multifunctional materials in various fields. Based on this, the research and development of foamed metal sandwich panel materials at home and abroad have given extensive attention and high attention, and carrie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/00
CPCB22D17/007
Inventor 杨明波钟罗喜肖竞沈威武刘婧吴若愚毕媛潘复生
Owner CHONGQING UNIV OF TECH
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