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Preparation method for Fe-Mn-Al alloy

A fe-mn-al alloy technology, applied in the field of light-weight high-strength alloy preparation, can solve the problems of high cost, complex process, heating rate and sintering temperature structure and composition, etc., to achieve good oxidation resistance and corrosion resistance , wide application prospects, light weight effect

Active Publication Date: 2017-09-29
陕西华领新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the cost is high and it is difficult to obtain high density, which significantly affects the strength, plasticity and comprehensive mechanical properties of the material.
In addition, the heating rate and sintering temperature have a great influence on the structure and composition of the material, and the process is relatively complicated.

Method used

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  • Preparation method for Fe-Mn-Al alloy
  • Preparation method for Fe-Mn-Al alloy
  • Preparation method for Fe-Mn-Al alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A preparation method of Fe-Mn-Al series high-strength light alloy, specifically comprising the following steps:

[0021] (1) Firstly, the manganese powder, aluminum powder and iron powder with a purity of 99.99% and a mesh size of 300 mesh are weighed and batched according to a certain mass percentage, and the mass fraction is: 30% Mn, 14.0% Al, and the rest is Fe; Put the powder into a ball mill jar and mix with a planetary ball mill, the ball-to-material ratio is 12:1, and the ball milling time is 4 hours.

[0022] (2) Take out the mixed powder obtained in step (1), and press it under a tablet press, where the pressure is 10MPa, to obtain a metal sheet of φ15×3, and put it in a copper crucible of a vacuum arc melting furnace. Melting is carried out under a protective atmosphere, and the melt is continuously processed by electromagnetic stirring to make the melt completely homogenized, and at the same time refine the precipitated phase and matrix structure. When the te...

Embodiment 2

[0026] A preparation method of Fe-Mn-Al series high-strength light alloy, specifically comprising the following steps:

[0027] (1) First, the manganese powder, aluminum powder and high-purity iron powder with a purity of 99.99% and a mesh size of 300 mesh are weighed and batched according to a certain mass percentage, and the mass fraction is: 24.0% Mn, 13.0% Al, and the rest is Fe; Put the powder into a ball mill tank and mix with a planetary ball mill, the ball-to-material ratio is 10:1, and the ball milling time is 4 hours.

[0028] (2) Take out the mixed powder obtained in step (1), and press it under a tablet press, where the pressure is 10MPa, to obtain a metal sheet of φ15×3, and put it in a copper crucible of a vacuum arc melting furnace. Melting is carried out under a protective atmosphere, and the melt is continuously processed by electromagnetic stirring to completely homogenize the melt and refine the precipitated phase and matrix structure at the same time. When ...

Embodiment 3

[0031] A preparation method of Fe-Mn-Al series high-strength light alloy, specifically comprising the following steps:

[0032] (1) Firstly, the manganese powder, aluminum powder and high-purity iron powder with a purity of 99.99% and a mesh number of 300 mesh are weighed and batched according to a certain mass percentage, and the mass fraction is: 18% Mn, 12% Al, and the rest is Fe; Put the powder into a ball mill tank and mix with a planetary ball mill, the ball-to-material ratio is 15:1, and the ball milling time is 4 hours.

[0033] (2) Take out the mixed powder obtained in step (1), and press it under a tablet press, where the pressure is 10MPa, to obtain a metal sheet of φ15×3, and put it in a copper crucible of a vacuum arc melting furnace. Melting is carried out under a protective atmosphere, and the melt is continuously processed by electromagnetic stirring to completely homogenize the melt and refine the precipitated phase and matrix structure at the same time. When ...

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Abstract

The invention relates to a preparation method for Fe-Mn-Al alloy, and belongs to the technical field of lightweight and high strength alloy preparation. The preparation method comprises the steps that by weight, 12.0-14.0% of Al, 18.0-30.0% of Mn and the balance Fe are mixed evenly and proportionally; mixed powder is subjected to tabletting and then is smelted under the protection of inert gas, melts are continuously stirred in the smelting process, and when the temperature of alloy melts reaches 1520-1550 DEG C, a water-cooling copper mold is adopted to cast a sample; the obtained sample is subjected to heat preservation at the 1000 DEG C for 2-3 hours under the protection of inert gas and then subjected to oil quenching, alloy after oil quenching continues to be heated to 550-650 DEG C at the atmosphere of inert gas and subjected to tempering treatment, after heat preservation is conducted for 2-4 hours, the alloy is cooled to the indoor temperature along with a furnace, and the Fe-Mn-Al lightweight and high strength alloy is obtained. The method is relatively simple and reliable, and the prepared Fe-Mn-Al alloy is high in strength, light, good in oxidation resistance and good in corrosion resistance.

Description

technical field [0001] The invention relates to a preparation method of Fe-Mn-Al alloy, which belongs to the technical field of light-weight high-strength alloy preparation. Background technique [0002] Fe-Mn-Al alloy has high strength, light specific gravity, good corrosion resistance, high temperature oxidation resistance, high resistance, low electrical conductivity, and low price. It is a promising high-temperature Structural materials. At present, as ordered intermetallic compounds of high-temperature structural materials, the A 3 B aluminides of type AB. Fe-Al intermetallic compound, because it does not contain strategic elements, has low cost, excellent oxidation resistance, corrosion resistance and high high temperature strength. A single Fe-Al alloy material has low strength and high brittleness. Adding Mn element on the basis of Fe-Al intermetallic compound will generate DO 3 ([Fe, Mn] 3 Al), B2 ([Fe, Mn]Al) ordered phases, thereby significantly improving th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/06C21D1/18
CPCC21D1/18C22C38/04C22C38/06
Inventor 冯晶陈良刘亚会蒋业华罗翔种晓宇
Owner 陕西华领新材料科技股份有限公司
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