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Device and method for preparing foamed aluminum material by blowing method

A technology of foamed aluminum and air blowing method, applied in the field of porous metal materials, can solve the problems of reducing the uniformity of final cells, difficult to realize industrial production, and reducing the efficiency of bubble generation, so as to reduce the probability of mixing with each other and control the cells. Reasonable size and distribution

Active Publication Date: 2021-08-06
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The cell size of the foamed aluminum material is directly related to the size of the bubbles in the aluminum melt during the preparation process. Therefore, the size of the bubbles in the melt can be reduced by reducing the diameter of the blowing pipe so as to control the cell size of the material; however, Reducing the diameter of the blowing pipe will limit the flow rate of the incoming gas, thereby reducing the efficiency of bubble generation, making it difficult to realize industrial production; in addition, after the bubbles reach the top, during the process of foam accumulation, the bubbles will redistribute outward along the center of the liquid surface. Increased coalescence of vesicles and reduced uniformity of final cells

Method used

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  • Device and method for preparing foamed aluminum material by blowing method
  • Device and method for preparing foamed aluminum material by blowing method

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Experimental program
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Effect test

Embodiment 1

[0034] The structure of the device for preparing foamed aluminum materials by blowing method is as follows: figure 1 As shown, the top view structure is as figure 2 Shown, comprise reaction vessel 7, gas blowing pipe 4 and gas chamber 3; Reactor 7 is provided with stirring paddle 10; The air blowing pipe head 6 is arranged in the reaction vessel 7, and the bottom end of each air blowing pipe 4 communicates with the air chamber 3, and the air blowing pipe 4 is provided with a flow controller 5 positioned between the bottom plate of the air chamber 3 and the reaction vessel 7; The chamber 3 communicates with the gas source through the intake pipe 1 with the pressure reducing valve 2;

[0035] The inner diameter of the air blowing pipe head 6 is 0.1mm; each air blowing pipe 4 is arranged in several rows on the base plate; in each row of air blowing pipes 4, the distance between two adjacent air blowing pipes 4 is 8mm; the distance between two adjacent rows of air blowing pipes ...

Embodiment 2

[0047] Device structure is the same as embodiment 1, and difference is:

[0048] (1) The inner diameter of the blowing pipe head is 0.15mm; the distance between two adjacent blowing pipes is 10mm; the distance between two adjacent rows of blowing pipes is 10mm;

[0049] (2) The number of blowing pipes is 62;

[0050] (3) The blowing pipe and blowing pipe head are made of stainless steel;

[0051] Method is with embodiment 1, and difference is:

[0052] (1) The tackifier is magnesium oxide powder;

[0053] (2) The average flow rate of air in each blowing tube is 5.7-6.3mL / min; the average size of tiny bubbles is 3.1mm, and the porosity of the aluminum foam material is 90%; the average cell size of the aluminum foam intermediate is 7.5mm.

Embodiment 3

[0055] Device structure is the same as embodiment 1, and difference is:

[0056] (1) The inner diameter of the blowing pipe head is 0.05mm; the distance between two adjacent blowing pipes is 5mm; the distance between two adjacent rows of blowing pipes is 5mm;

[0057] (2) The number of blowing pipes is 118;

[0058] (3) The blowing pipe and blowing pipe head are made of stainless steel;

[0059] Method is with embodiment 1, and difference is:

[0060] (1) The tackifier is magnesium oxide powder;

[0061] (2) The average flow rate of the air in each blowing tube is 2.7-3.3mL / min; the average size of the tiny bubbles is 1.0mm, the porosity of the aluminum foam material is 70%; the average cell size of the aluminum foam intermediate is 3.2mm.

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Abstract

A device and method for preparing foamed aluminum material by air blowing method, the device includes a reaction container, an air blowing pipe and an air chamber; a stirring paddle is arranged in the reaction container; several air blowing pipes pass through the bottom plate of the reaction container and are fixed on the bottom plate, and the air blowing pipe The top of each blowing pipe is provided with a blowing pipe head, and the bottom end of each blowing pipe is communicated with the air chamber, and the blowing pipe is provided with a flow controller; the air chamber communicates with the air source through an air inlet pipe with a pressure reducing valve; the method is: 1) Heat the aluminum alloy in the reaction vessel to form an aluminum alloy melt; add tackifier; (2) heat up and stir and mix; (3) cool down to 680±5°C; The air pipe enters the mixed material to form rising tiny bubbles, and the liquid surface forms a foamed aluminum intermediate, which is taken out and air-cooled. The device and method of the invention can prepare foamed aluminum material in a short time without destroying the continuity of the process, effectively control the cell size, and produce the foamed aluminum material with uniform cell distribution and good performance.

Description

technical field [0001] The invention belongs to the technical field of porous metal materials, and in particular relates to a device and a method for preparing foamed aluminum materials by blowing. Background technique [0002] As a new type of material, foamed aluminum has excellent properties such as low density, sound insulation, heat insulation, shock absorption, electromagnetic shielding, etc. It is widely used in construction, transportation, aerospace and other industries. Its material types are divided into open cells and closed cells. Two types, of which closed-cell materials are more widely used. The preparation methods of aluminum foam materials mainly include air blowing foaming method, powder metallurgy method and melt foaming method. The principle of the powder metallurgy method and the foaming agent foaming method is that the foaming agent is decomposed by high temperature and generates bubbles in the aluminum melt to obtain a closed-cell aluminum foam materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C21/00
CPCC22C1/08C22C21/00C22C1/086
Inventor 耿佃桥吴世同祖国胤
Owner NORTHEASTERN UNIV LIAONING