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A kind of iron-chromium-aluminum-based porous alloy material and preparation method thereof

An alloy material, iron-chromium-aluminum technology, which is applied in the field of porous alloy material preparation, can solve the problems of brittle preparation cost of iron-chromium-aluminum, influence the service life of materials, and high cost of raw materials, and achieves low cost, strong thermal shock resistance, mechanical good performance

Inactive Publication Date: 2016-09-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods can prepare iron-chromium-aluminum porous metal materials, there are problems such as complicated process and high raw material cost; Affect the service life of such materials in high temperature environment
[0004] Aiming at the problems that Fe-Cr-Al is brittle under high-temperature environment and the preparation cost of existing Fe-Cr-Al-based porous materials is high, the inventors have repeatedly studied and invented a new method for preparing Fe-Cr-Al-based porous materials

Method used

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  • A kind of iron-chromium-aluminum-based porous alloy material and preparation method thereof
  • A kind of iron-chromium-aluminum-based porous alloy material and preparation method thereof
  • A kind of iron-chromium-aluminum-based porous alloy material and preparation method thereof

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Embodiment 1

[0045] The mass percentage of the iron-chromium-aluminum-based porous alloy material prepared in this embodiment is:

[0046] Aluminum 3.75%, chromium 20.25%, silicon carbide 5%, lanthanum cerium mixed rare earth 0.038%, and the balance is iron.

[0047] A method for preparing an iron-chromium-aluminum-based porous alloy material of the present invention comprises the following steps:

[0048] Step 1: Preparation of rare earth-containing iron-silicon carbide sintered block

[0049] According to the mass ratio of silicon carbide and rare earth in the designed iron-chromium-aluminum-based porous alloy material, and the mass ratio of silicon carbide and rare earth enlarged by 5 times, 25kg of silicon carbide powder and 0.19kg of lanthanum-cerium mixed rare earth were respectively weighed, Mix it with 38kg of iron powder to get a mixed powder, vacuum ball mill the mixed powder for 10 hours to mix evenly, then press to shape, vacuum sinter at 1250°C for 2 hours, and cool down with...

Embodiment 2

[0067] The mass percentage of the iron-chromium-aluminum-based porous alloy material prepared in this embodiment is:

[0068] Aluminum 3.75%, chromium 20.25%, silicon carbide 5%, rare earth yttrium 0.49%, and the balance is iron.

[0069] A method for preparing an iron-chromium-aluminum-based porous alloy material of the present invention comprises the following steps:

[0070] Step 1: Preparation of rare earth-containing iron-silicon carbide sintered block

[0071] According to the mass ratio of silicon carbide and rare earth in the designed iron-chromium-aluminum-based porous alloy material, and the mass ratio of silicon carbide and rare earth enlarged by 5 times, 25kg of silicon carbide powder and 2.45kg of lanthanum-cerium mixed rare earth were respectively weighed, Mix it with 42kg of iron powder to get a mixed powder, vacuum ball mill the mixed powder for 10 hours to mix evenly, then press to shape, vacuum sinter at 1300°C for 1 hour, and cool down with the furnace to g...

Embodiment 3

[0089] The mass percentage of the iron-chromium-aluminum-based porous alloy material prepared in this embodiment is:

[0090] Aluminum 5.46%, chromium 19.58%, silicon carbide 5%, lanthanum cerium mixed rare earth 0.038%, and the balance is iron.

[0091] A method for preparing an iron-chromium-aluminum-based porous alloy material of the present invention comprises the following steps:

[0092] Step 1: Preparation of rare earth-containing iron-silicon carbide sintered block

[0093] According to the mass ratio of silicon carbide and rare earth in the designed iron-chromium-aluminum-based porous alloy material, and the mass ratio of silicon carbide and rare earth enlarged by 5 times, 25kg of silicon carbide powder and 0.19kg of lanthanum-cerium mixed rare earth were respectively weighed, Mix it with 38kg of iron powder to get a mixed powder, vacuum ball mill the mixed powder for 10 hours to mix evenly, then press to shape, vacuum sinter at 1250°C for 2 hours, and cool down with...

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Abstract

The invention discloses an iron-chromium-aluminum-based porous alloy material which can be used for filtering dust or high-temperature fluid and is excellent in high temperature strength and a preparation method thereof. The alloy material comprises the following components: aluminum, chromium, silicon carbide, rare earth and iron; the preparation method of the alloy material comprises the steps of preparation of iron-chromium-aluminum-based alloy powder and particles, preparation of a slurry material, cast molding, thermal degreasing, sintering and the like. The alloy material disclosed by the invention is reasonable in component proportion, simple in preparation process, low in cost, good in mechanical property, high in thermal shock resistance, good in corrosion resistance and oxidation resistance, adjustable in porosity and hole diameter size and especially good in heat transfer property, lays the foundation for widening the application of the material from filtration to the field such as heat transfer in an extreme environment, and is suitable for industrial production.

Description

technical field [0001] The invention relates to an iron-chromium-aluminum-based porous alloy material and a preparation method, which is particularly suitable for filtering dust or high-temperature fluid and has excellent high-temperature strength, and belongs to the technical field of porous alloy material preparation. Background technique [0002] The unique pore structure characteristics of porous metals make them have various physical properties such as filtration, sound absorption, sound insulation, heat dissipation, flame retardancy, and shock absorption. Therefore, they are widely used in aerospace, aviation, transportation, electronics, military industry, chemical industry, and environmental protection. Various high-tech fields such as energy, machinery, and biology have broad application prospects. However, there are not many researches on high-melting-point porous metals at home and abroad, and they mainly focus on materials such as iron and stainless steel as subs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/18C22C33/02
Inventor 王辉周向阳杨娟唐晶晶刘宏专
Owner CENT SOUTH UNIV
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