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Method for preparing FeAl-based intermetallic compound flexible film through Al infiltration

A flexible film and compound technology, applied in the field of inorganic porous film material preparation, can solve the problems of difficult processing, insufficient corrosion resistance, high aluminum content alloys, etc. Effect

Active Publication Date: 2020-12-15
向双清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the corrosion resistance of the current high-temperature stainless steel filter material is insufficient and the alloy with high aluminum content is difficult to process into a flexible film. The present invention provides a method for preparing a FeAl-based intermetallic compound flexible film by infiltrating Al

Method used

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  • Method for preparing FeAl-based intermetallic compound flexible film through Al infiltration
  • Method for preparing FeAl-based intermetallic compound flexible film through Al infiltration
  • Method for preparing FeAl-based intermetallic compound flexible film through Al infiltration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Preparation of Fe-based alloy flexible film by sintering process:

[0040] (1) Ingredients: According to the national standard composition ratio of 304 stainless steel (the mass percentage is Ni 11%, Cr 18%, Si1%, Mn 2%, P 0.045%, S 0.03%, C 0.08%, and the balance is Fe). Take each element powder, and add 0.5% of C powder additionally, the total weight of ingredients is 100g, to obtain pre-alloy powder; then add 30g of ethanol as wet grinding medium, 5g of binder PEG, and mix;

[0041] (2) Ball milling: after grinding for 24 hours in a planetary ball mill, pre-alloyed powder slurry is obtained;

[0042](3) Spraying and sizing: adopt a spray gun to spray the slurry on the 80-order 304 stainless steel wire mesh substrate, and the amount of sizing is 250g per square stainless steel wire mesh in terms of the pre-alloyed powder mass;

[0043] (4) Drying: put the wire mesh sprayed with the pre-alloyed powder in an oven to dry, the drying temperature is 80°C, and the dryin...

Embodiment 2

[0049] 1. Preparation of Fe-based alloy flexible film by sintering process:

[0050] (1) Ingredients: According to the national standard composition ratio of 316L stainless steel (in which mass percentage Ni 13%, Cr 18%, Si1%, Mn 2%, P 0.045%, S 0.03%, Mo 2%, C 0.03%, the balance Weigh each element powder for Fe), and additionally add 0.8% C powder, the total mass of the ingredients is 100g, to obtain pre-alloyed powder; then add 35g of wet grinding medium ethanol, 10g of binder PVA, and mix;

[0051] (2) Ball milling: after grinding for 30 hours in a planetary ball mill, a pre-alloyed powder slurry is obtained;

[0052] (3) Spraying and sizing: use a spray gun to spray the slurry on the 60-purpose 316L stainless steel wire mesh substrate, and the amount of sizing is 300g per square stainless steel wire mesh based on the pre-alloyed powder mass;

[0053] (4) Drying: put the wire mesh sprayed with the pre-alloyed powder in an oven to dry, the drying temperature is 80°C, and th...

Embodiment 3

[0059] 1. Preparation of Fe-based alloy flexible film by sintering process:

[0060] (1) Ingredients: According to the national standard composition ratio of 310s stainless steel (the mass percentage is Ni 22%, Cr 26%, Si 1.5%, Mn 2%, P 0.045%, S 0.03%, C 0.08%, and the balance is Fe ) Weigh each element powder, and additionally add 0.5% C powder, the total mass of ingredients is 100g, to obtain pre-alloy powder; then add 40g of wet grinding medium ethanol, binder PVB 5g, and mix;

[0061] (2) Ball milling: after grinding for 36 hours in a planetary ball mill, a pre-alloyed powder slurry is obtained;

[0062] (3) Spraying and sizing: use a spray gun to spray the slurry on the 80-order 310s stainless steel wire mesh substrate, and the amount of sizing is 350g per square stainless steel wire mesh in terms of the pre-alloyed powder mass;

[0063] (4) Drying: put the wire mesh sprayed with the pre-alloyed powder in an oven to dry, the drying temperature is 80°C, and the drying ti...

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Abstract

The invention discloses a method for preparing a FeAl-based intermetallic compound flexible film through Al infiltration. According to the method, a Fe-based alloy flexible film is prepared by adopting a sintering process, then the Al infiltration is carried out by adopting a powder embedding method, and an Al infiltration agent is composed of iron-aluminum alloy powder, Al2O3 powder and NH4Cl, sothat the FeAl-based intermetallic compound flexible film is formed. According to the invention, the defects of a traditional filter film are overcome, and the prepared FeAl-based intermetallic compound flexible film is high in porosity, has good high-temperature oxidation resistance, vulcanization performance, mechanical performance and filtering performance, and can be used for filtering, separating and purifying in a high-temperature environment and a strong-corrosion environment.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic porous membrane materials, and in particular relates to a method for preparing FeAl-based intermetallic compound flexible membranes by infiltrating Al. Background technique [0002] High-temperature gas filtration is a key pre-process of flue gas waste heat recovery and desulfurization and denitrification processes in coal chemical, petrochemical, coal power, steel and other production enterprises, and is the core process for clean production and control of air pollutant emissions. Industrial flue gas has high temperature, large temperature fluctuation, and strong corrosion, which puts forward strict requirements for filter materials. Metal porous materials have excellent thermal shock resistance, high temperature resistance, corrosion resistance and other properties, especially easy to process into large size, low membrane resistance, ultra-thin flexible filter materials. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/50C23C24/08B22F9/04B22F3/10B01D39/12B01D46/00B01D46/54
CPCC23C10/50C23C24/08B22F9/04B22F3/1007B01D39/12B01D46/0001B01D46/543B22F2009/043
Inventor 唐伟力向双清
Owner 向双清
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