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FeAl foam metal preparation method

A foam metal and foam technology is applied in the field of electrothermal alloy preparation, which can solve the problems of high apparent resistivity, high specific surface area, low density, etc.

Inactive Publication Date: 2017-05-31
CHANGDE LYRUN MATERIAL
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  • Abstract
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AI Technical Summary

Problems solved by technology

There are many studies on the above-mentioned series of electrothermal alloys. Due to the limitation of traditional preparation technology, it is difficult to further improve the performance of alloys. It is urgent to develop a new electrothermal alloy material to meet practical applications.
[0003] Metal foam materials have excellent properties such as low density, high specific surface area, and high apparent resistivity, and have broad application prospects in fluid heating and electrothermal catalysis. In the prior art, porous Al discs are used as heating elements to make air heating However, there are very few reports on the use of metal foam as an electrothermal material to study its preparation process and electrical properties.

Method used

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  • FeAl foam metal preparation method

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Embodiment Construction

[0015] Further illustrate and understand the present invention through embodiment below.

[0016] Firstly, the foamed Fe-based alloy was prepared by sintering process, and then, on the basis of the foamed Fe-based alloy, Al was infiltrated by powder embedding method, and the infiltrating agent was composed of aluminum-iron alloy powder, Al 2 o 3 Powder and NH 4 Cl composition, forming FeAl foam metal.

[0017] The sintering process includes:

[0018] (1) Batching: according to Si: 6.2%, Cr: 2.6%, Ni: 3.5%, Nb: 3%, Zr: 1%, Ti: 0.3%, the balance is the proportioning of iron;

[0019] (2) Ball milling: After grinding for 40 hours in a high-energy ball mill, an alloy powder with an average particle size of 2 μm was obtained;

[0020] (3) Sintering: put the mold filled with the above alloy powder into a sintering device, and sinter under vacuum conditions while applying pressure at a sintering temperature of 1000°C for 9 hours to obtain a foamed Fe-based alloy.

[0021] The po...

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Abstract

The present invention relates to a FeAl foam metal preparation method, which comprises: preparing a foam Fe-based alloy by using a sintering process, and infiltrating Al by using a powder embedding method on the basis of the foam Fe-based alloy to form the FeAl foam metal, wherein the infiltrating agent comprises aluminum-iron alloy powder, AI2O3 powder, and NH4CI. According to the present invention, with the FeAl foam metal preparation method, the disadvantage of the traditional electric heating alloy is overcome, and the produced FeAl foam metal has excellent oxidation resistance and excellent resistivity.

Description

technical field [0001] The invention relates to a method for preparing an electrothermal alloy, in particular to a method for preparing FeAl foam metal. Background technique [0002] Electrothermal alloy materials are resistance alloys that use the resistance properties of substances to manufacture heating elements. At present, electrothermal alloy materials have become an important engineering material, suitable for machinery, metallurgy, electronics, chemical industry and other industries, and occupy an important position in the national economy. According to their chemical composition, they can be divided into nickel-chromium alloy, nickel-chromium-iron alloy and iron alloy. Three series of chrome aluminum alloy. There are many studies on the above-mentioned series of electrothermal alloys. Due to the limitation of the traditional preparation process, it is difficult to further improve the properties of the alloys. It is urgent to develop a new electrothermal alloy mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/50C22C33/02
Inventor 余兴华易秋珍钟建夫朱济群
Owner CHANGDE LYRUN MATERIAL