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A kind of foamed magnesium or foamed magnesium alloy and preparation method thereof

A foamed magnesium alloy and foamed magnesium technology are applied in the fields of metal material metallurgy and metal material processing, and can solve the problems of complex thermal decomposition products, difficult control, and insufficient purity of porous foamed magnesium or magnesium alloys, achieving small thermal expansion and safe preparation process. Reliable, slightly corrosive effect

Active Publication Date: 2019-02-01
镁高镁诺奖(铜川)新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the sintering process, because urea decomposes to produce different products in different temperature ranges, the thermal decomposition products are more complex, and the prepared porous magnesium foam or magnesium alloy is not pure enough, so it is very difficult to control

Method used

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  • A kind of foamed magnesium or foamed magnesium alloy and preparation method thereof
  • A kind of foamed magnesium or foamed magnesium alloy and preparation method thereof

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preparation example Construction

[0042] The preparation method of above-mentioned foamed magnesium or foamed magnesium alloy, its technological process is as follows figure 1 As shown, the specific steps are as follows:

[0043] Step 1, calculation and weighing of raw materials:

[0044] According to the expected porosity, calculate the mass of the required magnesium powder and magnesium sulfate particles according to formulas (1-1) and (1-2). Weigh the corresponding raw materials according to the calculated values:

[0045] m 1 =V×ρ 1 ×(1-P) (1-1)

[0046] m 2 =V×ρ 2 ×P (1-2)

[0047] where P is the expected porosity, m 1 and m 2 are the mass of magnesium powder and magnesium sulfate particles respectively, ρ 1 and ρ 2 are the densities of magnesium powder and magnesium sulfate particles respectively, wherein the density of pure magnesium powder is 1.74g / cm 3 , the density of magnesium alloy powder is (1.8~2.1) g / cm 3 The particle density of magnesium sulfate is 2.66g / cm 3 ;

[0048] Step 2, d...

Embodiment 1

[0067] (1) Calculation and weighing of raw materials: Calculate the mass of the required powder particles according to formulas (1-1) and (1-2). The expected porosity of the present embodiment is 30%, so the mass percentages of magnesium powder and magnesium sulfate particles are 60.42% and 39.58% respectively;

[0068] (2) Drying: Dry the weighed magnesium powder and magnesium sulfate granules separately, the drying temperature is 120° C., and the drying time is 2 hours. Among them, the particle size of the pore-forming agent magnesium sulfate is 250 μm, and the magnesium powder is 150 μm;

[0069] (3) Powder mixing: the two are filled with argon in a closed stainless steel container for powder mixing, and absolute ethanol is added in the powder mixing process, and the ratio of the powder mixing particles to absolute ethanol is 10g:1ml;

[0070] (4) Filling: Load the uniformly mixed samples into the mold in a sandwich structure. That is to say, two AZ31 magnesium alloy plat...

Embodiment 2

[0076] (1) Calculation and weighing of raw materials: Calculate the mass of the required powder particles according to formulas (1-1) and (1-2). The expected porosity of the present embodiment is 50%, so the mass percentages of magnesium powder and magnesium sulfate particles are respectively 39.55% and 60.45%;

[0077] (2) Drying: The weighed magnesium powder and magnesium sulfate particles were dried separately, the drying temperature was 130° C., and the drying time was 2.5 hours. Among them, the particle size of the pore-forming agent magnesium sulfate is 150 μm, and the magnesium powder is 75 μm;

[0078] (3) Powder mixing: the two are filled with argon in a closed stainless steel container for powder mixing, and absolute ethanol is added in the powder mixing process, and the ratio of the powder mixing particles to absolute ethanol is 12g:1ml;

[0079] (4) Filling: Load the uniformly mixed samples into the mold in a sandwich structure. That is to say, a ZK60 magnesium a...

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Abstract

The invention discloses foamed magnesium or foamed magnesium alloy. Magnesium powder or magnesium alloy powder is used as raw materials, magnesium sulfate particles are used as filling materials, and the foamed magnesium or the foamed magnesium alloy is prepared and obtained by using a powder metallurgic method. The invention further discloses a preparing method of the foamed magnesium or the foamed magnesium alloy. The preparing method comprises the following steps that magnesium sulfate is used as a pore-forming agent, sandwich structural foamed magnesium or magnesium alloy is prepared by using the powder metallurgic method, the magnesium sulfate does not decompose in the sintering process, thermal expansion is low, the volume is stable, and the preparing technology is safer and more reliable; and in addition, the magnesium sulfate particles are easy to dissolve in water, in the dissolving process of a magnesium / magnesium sulfate compound body, the corrosion degree of SO4<2-> on a metallic magnesium base body is slight, the magnesium sulfate can be conveniently removed, and the prepared foamed magnesium or a magnesium alloy material is more pure. Effective welding and combining between the magnesium or the magnesium alloy particles is facilitated through first hot pressing and then segmented sintering. According to the foamed magnesium or the foamed magnesium alloy and the preparing method of the foamed magnesium or the foamed magnesium alloy, the aperture size of the foamed magnesium or the foamed magnesium alloy is uniform, aperture gaps are arrayed evenly in the three-dimensional space, and the aperture gap ratio is 30-65%.

Description

technical field [0001] The invention belongs to the technical field of metal material metallurgy and metal material processing, and relates to foamed magnesium or a foamed magnesium alloy, and also relates to a preparation method of the foamed magnesium or foamed magnesium alloy. Background technique [0002] With the rapid development of economy and society, national defense industry, industrial construction, automobile safety, child protection, sporting goods and daily life appliances put forward new requirements for protective materials such as energy saving and emission reduction, high performance impact resistance, shock absorption and energy absorption. Therefore, the development of a new material that can meet these special performance requirements has become a hot spot for future industrial development. [0003] Metal foam is a special metal material containing foam pores, and it is a new type of material developed by human science and technology. Due to its unique ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08B22F3/14B22F3/11
CPCB22F3/1134B22F3/114B22F3/14B22F2003/145B22F2998/10B22F1/0003
Inventor 徐春杰郭权芬王弋丹许帅马东孙蕾刘超彭倩门林妍张忠明
Owner 镁高镁诺奖(铜川)新材料有限公司
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