Method for preparing foamed magnesium used as buffering energy absorption material

An energy-absorbing material and foamed magnesium technology, which is applied in the field of foamed metal materials, can solve the problems of short stress platform, poor energy-absorbing effect, and short durability time of foamed magnesium, and achieve the advantages of reducing manufacturing cost, improving performance and reducing energy consumption. Effect

Active Publication Date: 2014-06-18
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the above-mentioned deficiencies existing in the prior art, the object of the present invention is to provide a kind of foamed magnesium preparation method that is used for cushioning energy-absorbing materi

Method used

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  • Method for preparing foamed magnesium used as buffering energy absorption material
  • Method for preparing foamed magnesium used as buffering energy absorption material
  • Method for preparing foamed magnesium used as buffering energy absorption material

Examples

Experimental program
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Effect test

Example Embodiment

[0028] Example 1:

[0029] This embodiment provides a method for preparing magnesium foam for buffering energy-absorbing materials, and the flow is referred to figure 1 As shown, the main steps include the following:

[0030] (1) Ingredients:

[0031] Weigh 41.7 parts by weight of urea and 58.3 parts by weight of magnesium powder to form 100 parts by weight and mix in the grind. During the mixing process, add 15-20ml of absolute ethanol per kilogram of urea and magnesium powder. The addition of ethanol and anhydrous ethanol is conducive to the uniform mixing of urea and magnesium powder, thereby changing the pore structure of the sintered foamed magnesium. However, if too much ethanol is added, it is also not conducive to the mixing of urea and magnesium powder. In the raw materials, the particle size of urea as a pore former is 1.00 to 1.18mm, and the particle size of magnesium powder is 120 to 200 mesh. The mixture obtained after mixing is kept in a sealed bag for later use. The...

Example Embodiment

[0040] Example 2:

[0041] This embodiment is used for the preparation method of foamed magnesium for buffering energy absorbing material, which refers to the process flow figure 2 The main steps include the following:

[0042] (1) Weigh 23.4 parts by weight of urea and 76.6 parts by weight of magnesium powder to form 100 parts by weight and mix in the grind. During the mixing process, 15-20ml of absolute ethanol is added to each kilogram of urea and magnesium powder. Add absolute ethanol in proportions; wherein the particle size of urea is 1.00 to 1.18 mm; the particle size of magnesium powder is 120 to 200 mesh.

[0043] (2) Use a steel mold to statically press the mixture obtained in the previous step, with a pressing pressure of 200-300 MPa, and a pressure-holding time of 1 to 2 minutes, and demold to obtain a green body.

[0044] (3) Put the green body into a vacuum carbon tube furnace for sintering. The sintering process is divided into two steps: low temperature vacuum sinteri...

Example Embodiment

[0046] Example 3:

[0047] This embodiment is used for the preparation method of foamed magnesium for buffering energy absorbing material, which refers to the process flow figure 2 The main steps include the following:

[0048] (1) Weigh 32.4 parts by weight of urea and 67.6 parts by weight of magnesium powder to form 100 parts by weight and mix them in the grind. During the mixing process, 15-20ml of absolute ethanol is added per kilogram of urea and magnesium powder. Add absolute ethanol in proportions; wherein the particle size of urea is 1.00 to 1.18 mm; the particle size of magnesium powder is 120 to 200 mesh.

[0049] (2) Use a steel mold to statically press the mixture obtained in the previous step, with a pressing pressure of 200-300 MPa, and a pressure-holding time of 1 to 2 minutes, and demold to obtain a green body.

[0050] (3) Put the green body into a vacuum carbon tube furnace for sintering. The sintering process is divided into two steps: low temperature vacuum sinter...

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Abstract

The invention discloses a method for preparing foamed magnesium used as a buffering energy absorption material. According to the method, the powder metallurgy pore-forming agent technology is adopted, urea and magnesium powder are used for preparing the foamed magnesium through the compounding and mixing step, the compression molding step and the sintering step, the urea is used as a pore-forming agent, and absolute ethyl alcohol is used as a binder; as a result, the pore structure of the material is more uniform, the performance of the obtained foamed magnesium material is improved, substances which pollute the environment cannot be produced after the urea and the absolute ethyl alcohol are removed at a high temperature, and the material cost is low; moreover, the two-section type sintering process is adopted, so that consumption of energy is reduced, preparation cost is lowered, and benefit is increased. The foamed magnesium prepared through the method has low yield stress and a wide stress platform, meets the requirement for a good buffering energy absorption material, can be well applied to a vehicle damper and the like to serve as the buffering energy absorption material, provides a novel technological approach for preparation of a material of a high-performance buffer and has very good application prospect.

Description

technical field [0001] The invention relates to the technical field of foamed metal materials, in particular to a method for preparing foamed magnesium used for cushioning energy-absorbing materials. Background technique [0002] The porosity of the material endows the porous material with new and excellent properties, making it have uses that the dense material cannot match, thus expanding the research field and application range of the foam material. The density of pure magnesium is 1.74g / cm 3 , is the lightest metal used in the industry. It has a more obvious weight reduction effect than aluminum. At the same time, magnesium has higher specific strength, specific stiffness and specific elastic modulus, noise reduction and shock absorption performance and dimensional stability, and electromagnetic wave interference protection. Strong, and without grinding and polishing, you can get a series of advantages such as castings with smooth surface and recyclable utilization. Ma...

Claims

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Application Information

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IPC IPC(8): B22F3/16B22F5/10
Inventor 邱贵宝廖益龙杨杨肖健陈龙白晨光吕学伟扈玫珑徐健张生富温良英
Owner CHONGQING UNIV
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