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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

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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 material, in order to solve the stress plateau of the foamed magnesium that the obtained foamed magnesium preparation process of the prior art is shorter, Poor energy absorption effect, easy to corrode, and short durability

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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

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Embodiment 1

[0029] This embodiment provides a kind of preparation method for the foamed magnesium that is used for cushioning energy-absorbing material, and its flow process refers to figure 1 As shown, the main steps include the following:

[0030] (1) Ingredients:

[0031] Take by weighing the urea of ​​41.7 parts by weight and the magnesium powder of 58.3 parts by weight, constitute 100 parts by weight and mix in the research body, and add anhydrous ethanol in the ratio of 15~20ml dehydrated alcohol by the mixture of every kilogram of urea and magnesium powder in the mixing process The addition of water ethanol and absolute ethanol is conducive to the uniform mixing of urea and magnesium powder, thereby changing the pore structure of the sintered foamed magnesium, but if too much absolute ethanol is added, it is also not conducive to the mixing of urea and magnesium powder ; Among the raw materials, the particle size of urea as a pore-forming agent is 1.00-1.18 mm, and the particle si...

Embodiment 2

[0041] This embodiment is used for the preparation method of the foamed magnesium of cushioning energy-absorbing material, and it refers to technological process 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 of the mixture in the research body, and add 15 to 20 ml of absolute ethanol to the mixture of urea and magnesium powder per kilogram during the mixing process Proportionally add absolute ethanol; wherein, the particle size of urea is 1.00-1.18 mm; the particle size of magnesium powder is 120-200 mesh.

[0043] (2) Statically press the mixture obtained in the previous step with a steel mold, the pressing pressure is 200-300MPa, the holding time is 1-2min, and the green body is obtained by demoulding.

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

Embodiment 3

[0047] This embodiment is used for the preparation method of the foamed magnesium of cushioning energy-absorbing material, and it refers to technological process 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 of the mixture in the research body, and add 15-20ml of absolute ethanol to the mixture of urea and magnesium powder per kilogram during the mixing process Proportionally add absolute ethanol; wherein, the particle size of urea is 1.00-1.18 mm; the particle size of magnesium powder is 120-200 mesh.

[0049] (2) Statically press the mixture obtained in the previous step with a steel mold, the pressing pressure is 200-300MPa, the holding time is 1-2min, and the green body is obtained by demoulding.

[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 si...

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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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