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Foam metal preparation method and foam metal preparation device

A metal foam and preparation device technology, which is applied in the field of metal foam preparation and metal foam preparation devices, can solve problems such as insufficient seepage, and achieve the effects of uniform cell distribution, good reproducibility, and stable quality

Pending Publication Date: 2019-07-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a foam metal preparation method and a foam metal preparation device for the problems of insufficient seepage, seepage transition and intermediate defects in the infiltration casting method

Method used

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  • Foam metal preparation method and foam metal preparation device
  • Foam metal preparation method and foam metal preparation device
  • Foam metal preparation method and foam metal preparation device

Examples

Experimental program
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Effect test

preparation example Construction

[0035] The embodiment of the present invention provides a kind of preparation method of metal foam, comprising:

[0036] S10, providing an airtight container containing inorganic salt particles, the inorganic salt particles are mechanically accumulated in the airtight container to form an inorganic salt particle accumulation body, and the inorganic salt particle accumulation body is covered with a briquette, the the melting point of the inorganic salt particles and the compact is greater than the melting point of the metal foam;

[0037] S20, vacuumizing the airtight container;

[0038] S30, heating the airtight container and providing liquid metal on the side of the briquette in the airtight container away from the accumulation body of the inorganic salt particles, the heating temperature is lower than that of the inorganic salt particles and the briquette and greater than or equal to the melting point of the metal foam;

[0039] S40, there is a gap between the briquetting ...

Embodiment

[0077] In this embodiment, industrial pure aluminum is selected as the solid metal ingot, and the industrial pure aluminum is melted and cast into an aluminum ingot with a shape and size that matches the inner cavity of the airtight container 200. In order to prevent the solid metal ingot from compressing and deforming the accumulation of inorganic salt particles, The bottom surface of the cast aluminum ingot should be kept flat. NaCl is selected as the inorganic salt particles 400, and after screening, the particle size of the NaCl particles is 0.3-0.5 mm. For a macroscopic view of NaCl particles see figure 2 shown.

[0078] Raise the temperature of the well-type resistance heating furnace to 730°C at a heating rate of 20°C / min and keep it warm.

[0079] Use sandpaper to polish the surface of the inner cavity of the airtight container 200 to prevent obvious impurities from remaining. Coat the release agent on the inner wall of the airtight container 200 and then dry it. ...

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Abstract

The invention discloses a preparation method of foam metal. The preparation method of the foam metal comprises the steps that a closed container containing inorganic salt particles is provided, the inorganic salt particles are mechanically piled in the closed container, an inorganic salt particle piling body is formed and covered with a pressing block in a pressing mode, and the melting point of the inorganic salt particles and the melting point of the pressing block are higher than that of the foam metal; vacuumizing treatment is conducted on the closed container; the closed container is heated, and liquid metal is provided for the side, far away from the inorganic salt particle piling body, of the pressing block in the closed container; a clearance is formed between the pressing block and the side wall of the closed container, and / or the pressing block is provided with a first through hole, gas is supplied in the closed container, and the liquid metal penetrates through the clearanceand / or the first through hole to seep among the inorganic salt particles; the liquid metal is cooled to be solidified, and a metal inorganic salt composite body is obtained; and the metal inorganic salt composite body is treated through a solvent, and the inorganic salt particles are dissolved to be removed. The invention further discloses a foam metal preparation device.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a foam metal preparation method and a foam metal preparation device. Background technique [0002] Foam metal refers to a new type of material with pores distributed in the metal matrix. It has two elements. One is that the material contains a large number of pores, and the other is that the pores contained are used to meet certain or some design requirements to achieve the desired effect. Expected usage performance metrics. The pores in metal foam are functional phases, which are used to optimize the performance of the material. According to the characteristics of the pore structure, it can be divided into closed-cell foam and open-cell foam. The cells of closed-cell foam metal are isolated from each other and exist independently; the cells of open-cell foam metal are connected to each other and to the atmosphere, and are more used for filtration, heat dissipation, sou...

Claims

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Application Information

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IPC IPC(8): B22D25/00C22C1/08
CPCB22D25/005C22C1/08C22C1/082
Inventor 刘源万坦陈祥张华伟
Owner TSINGHUA UNIV
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