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Preparation method of iron-aluminum-chromium filter material

A filter material, iron and aluminum technology, applied in the field of material processing and manufacturing, can solve problems such as hidden safety hazards, high cost, and the existence of the preparation process.

Active Publication Date: 2021-11-02
WESTERN BAODE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a method for preparing an iron-aluminum-chromium filter material, which is used to solve the problems of complicated preparation process, high cost and potential safety hazards in the preparation process of the existing filter material

Method used

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  • Preparation method of iron-aluminum-chromium filter material
  • Preparation method of iron-aluminum-chromium filter material

Examples

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preparation example Construction

[0023] figure 1 An exemplary showing a schematic flow schematic of a method of preparing an iron-aluminum chromium filter material according to an embodiment of the present invention. This method mainly includes the following steps:

[0024] Step 101, a particulate powder having a particle diameter of 75 to 750 μm and a particle size of 5 to 40 μm and a particle size of 50-180 μm were stirred in a ball mill for 120 minutes to obtain an initial ingredient, wherein in the initial ingredients, iron The atomic percentage content of the powder is between 65 and 70, the atomic percentage of the aluminum powder is between 23 to 25, and the atomic content of chromium powder is between 2-5;

[0025] Step 102, placing the initial ingredients into the internal pressure of the pressure to form a pressed blank, wherein the pressing pressure is 200-260 MPa;

[0026] Step 103, placed the press-stained blank in a sintering furnace filled with hydrogen, and heat insulation 2-3h, resulting in a fi...

Embodiment 1

[0038] Step 201, select the particle diameter of 75-100 μm iron powder, the particle diameter is 20 μm aluminum powder, wherein the iron powder and aluminum powder are mixed according to the atomic content ratio of 3: 1, and then the atomic percentage ratio is 4. 50 μm chromium powder. The mixed powder was placed in a ball mill, wherein the ball miner selected from 20 mm, the ball ratio 6: 1, the ball mill was rotated at 300 r / min for 120 minutes to obtain an initial ingredient.

[0039] Step 202, the initial ingredients are molded once in the case of the thermostatic press, resulting in a pressing blank. The pressing pressure is 200 MPa.

[0040] Step 203, press the billet into the boat, the billet is required to fill the particle diameter of 30 μm alumina fine sand.

[0041] The in situ reaction constraint sintering is then performed in a sintering furnace charged in hydrogen, wherein the sintering furnace begins to heat up at 6 degrees Celsius / min until the temperature reac...

Embodiment 2

[0044] Step 301, select particle diameter of 150-260 μm iron powder, particle diameter of 30 μm aluminum powder, wherein the iron powder and aluminum powder are mixed according to the atomic content ratio of 3: 1, then adding atomic percentage ratio of 4. 80 μm chromium powder and atomic percentage of molybdenum powder were 1. The mixed powder was placed in a ball mill, wherein the ball miner selected from 20 mm, the ball ratio 6: 1, the ball mill was rotated at 300 r / min for 120 minutes to obtain an initial ingredient.

[0045] Step 302, the initial ingredient is formed once, and the pressure blank is obtained at one time by using the initial ingredient. The pressing pressure is 210 MPa.

[0046] Step 303, press the billet into the boat, and 100 μm alumina fine sand is required around the compression.

[0047] The in situ reaction constraint sintering is then performed in a sintering furnace charged in hydrogen, wherein the sintering furnace begins to heat up at 6 degrees Celsi...

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Abstract

The invention discloses a preparation method of an iron-aluminum-chromium filter material, and relates to the field of material processing and manufacturing. The problems that an existing filtering material is complex in preparation process and high in cost, and potential safety hazards exist in the preparation process are solved. The preparation method comprises the steps that iron powder with the particle size ranging from 75 micrometers to 750 micrometers, aluminum powder with the particle size ranging from 5 micrometers to 40 micrometers and chromium powder with the particle size ranging from 50 micrometers to 180 micrometers are stirred in a ball mill for 120 minutes, an initial ingredient is obtained, in the initial ingredient, the atom percentage content of the iron powder ranges from 65% to 70%, the atom percentage content of the aluminum powder ranges from 23% to 25%, and the atom percentage content of the chromium powder ranges from 2% to 5%; the initial ingredient is placed in a cold isostatic press to be pressed into a pressed blank, and the pressing pressure ranges from 200 Mpa to 260 Mpa; the pressed blank is placed in a sintering furnace filled with hydrogen to be subjected to in-situ reaction sintering, heat preservation is conducted for 2-3 h, the filtering material is obtained, and the temperature in the sintering furnace ranges from 1200 DEG C to 1300 DEG C during in-situ reaction sintering.

Description

Technical field [0001] The present invention relates to the field of material processing and manufacturing, and more particularly to a method for preparing iron-aluminum chromium filter material. Background technique [0002] FE 3 The Al-metal compound porous material has the advantages of low cost, low density, good mechanical properties and machining properties, high temperature oxidation, and vulnetrinization resistance, and widely used in high-temperature high-voltage smoke dust removal, chemical, electric power and other industries. Conventional Fe 3 AL porous material is passed through Fe 3 Al alloy powder is prepared by using powder metallurgy, there are many steps, the powder utilization rate is low, the cost is high, Fe 3 The Al alloy powder is prone to an explosion during the preparation (25 at%), and there is a safety hazard. Inventive content [0003] Embodiments of the present invention provide problems for the preparation of iron-aluminum chrome filter material to ...

Claims

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Application Information

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IPC IPC(8): C22C38/06C22C38/18C22C33/02B22F3/04B22F3/11C22C38/22C22C38/32C22C38/04B01D39/20
CPCC22C38/06C22C38/18C22C33/0278B22F3/04B22F3/1143C22C38/22C22C38/32C22C38/04B01D39/2051
Inventor 曹柏亮南海娟吴磊薛翠翠李永利张旭窦微英亢欢敏
Owner WESTERN BAODE TECH CO LTD
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