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Process for preparing foam composite material of magnesium alloy-pearlite

A composite material and magnesium alloy technology, applied in the field of magnesium alloy-perlite foam composite material and its preparation, can solve the problems of difficult corrosion protection of environmentally friendly foam magnesium products, reasonable design, lack of property protection, and the addition of composite materials. Achieve the effects of easy industrial mass production, low equipment depreciation cost, and simple process

Inactive Publication Date: 2007-10-10
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Patent No. 200310111400.1 discloses a patent titled "A Preparation Process for Foamed Magnesium", which discloses that it is easy to make liquid Mg permeate particles of 16 mesh to 120 mesh to obtain foamed magnesium by vacuum infiltration method, and the inventor published in the Chinese Journal "Special Casting and Nonferrous Alloys" Issue 6, 2003, P 8-10, reported the details of preparing foamed magnesium using the same method as the above-mentioned invention, and the selected particles are MgSO 4 Or NaCl; because the particle size selection of salt particles is limited, the vacuum seepage channel is smooth, but the disadvantage is that a large amount of water is used to dissolve the salt particles in the post-treatment process, and environmental protection and corrosion protection of foamed magnesium products are difficult to solve
Chinese patent No. 200410012162.3 discloses a patent titled "Magnesium-based foam composite material and its preparation", which discloses the use of Mg alloy powder and MgCO 3 As a raw material, the foamed magnesium composite material is prepared by powder metallurgy. One of the advantages of this invention is that the blowing agent MgCO 3 The residual MgO after foaming has no serious impact on the corrosion resistance of foamed magnesium, but its shortcomings are reflected in the fact that small devices can be prepared by powder metallurgy, and industrial production of large-volume tubes, strips, and sheets is restricted.
Obviously, artificially increasing the content of Fe in the composite material leaves a hidden danger of corrosion, which is seriously lacking in the rationality of material design and the quality assurance of the material during use.

Method used

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  • Process for preparing foam composite material of magnesium alloy-pearlite
  • Process for preparing foam composite material of magnesium alloy-pearlite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Use 200-mesh aluminum powder and polyvinyl alcohol dilute solution to prepare aluminum powder slurry, and spray the aluminum powder slurry to the particle size interval V p On the surface of expanded perlite particles with openings of 14 mesh to 40 meshes, hot air drying, the weight of aluminum powder sprayed on the surface of expanded perlite with openings is 1.5% of the weight of expanded perlite, and then the expanded perlite containing aluminum powder on the surface The pearl particles are put into the vacuum suction casting mold, the gap between the particles is adjusted by the vibration method to adjust the air permeability, and the vacuum pump is started to make the vacuum degree of the vacuum tank reach 0.06Pa. The AZ91 magnesium alloy is heated and melted at a temperature T c Controlled at 670°C±5°C, the alloy liquid is connected to the suction casting port, the vacuum hand valve is opened to start suction casting, the speed of suction casting is controlled by ...

Embodiment 2

[0013] V p =14 mesh~24 mesh; The weight of the aluminum powder that is sprayed on the expanded perlite surface of opening is 4% of the weight of expanded perlite; T c =750°C±5°C; V c =0.5m / s, the magnesium alloy-perlite foam composite material of the present invention is obtained. Among them, ρ=1.18g / cm 3 ; σ max =221MPa; σ y =78MPa. All the other are with embodiment 1.

Embodiment 3

[0015] Mix calcium carbonate powder of equal weight in the aluminum powder; V p =8 mesh~18 mesh; The weight of the mixed powder of aluminum powder and calcium carbonate powder sprayed on the surface of open-cell expanded perlite is 2% of the weight of open-cell expanded perlite; T c =700°C±5°C; V c =0.1m / s, the magnesium alloy-perlite foam composite material of the present invention is obtained. Among them, ρ=1.24g / cm 3 ; σ max =179MPa; σ y =82MPa. All the other are with embodiment 1.

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Abstract

A foamed Mg alloy-pearlite composition is prepared from expanded pearlite and Mg or Mg alloy through vacuum percolation casting. Its advantages are light weight and easy control of foam pore.

Description

Technical field: [0001] The invention relates to a magnesium alloy-perlite foam composite material and a preparation method thereof Background technique: [0002] Foam alloys, expanded perlite, pitch stone, and vermiculite have attracted much attention due to their light weight and good noise reduction properties. Expanded perlite, vermiculite, floating beads and other inorganic non-metallic materials combined with rubber as the "sound-absorbing tile" of the submarine shell or compounded with cement as common sound insulation panels on both sides of railways, expressways, subways, etc. have a wide range of applications. application. However, the influence and extensiveness of the current application of foamed magnesium alloys cannot be compared with the above-mentioned inorganic non-metallic composite materials. The main reason is that some technical difficulties are more prominent in the preparation process of foamed magnesium alloy or its composite materials, especially ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/06B22D19/16
Inventor 王立民吴耀明豆传国彭秋明房大庆杨洁孟健张洪杰
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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