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High-performance iron-based medium-entropy alloy and heat treatment method thereof

Active Publication Date: 2021-11-23
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-entropy alloys contain high content of expensive Co and Ni elements, and the application cost is high
Iron-based medium-entropy alloys have a good balance between cost and performance. However, changes in composition have a great impact on the mechanical properties of iron-based medium-entropy alloys, and there is a lack of systematic research. Various alloying elements play an important role in the phase selection process. The effect is not clear, and the determination of the alloy composition is not scientific and systematic, resulting in a large randomness in the performance of the alloy

Method used

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  • High-performance iron-based medium-entropy alloy and heat treatment method thereof
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  • High-performance iron-based medium-entropy alloy and heat treatment method thereof

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Embodiment 1

[0035] A high-performance iron-based medium-entropy alloy, comprising the following components in molar percentages:

[0036] Al: 17at%, Cr: 10at%, Fe: 47at%, Ni: 26at%.

[0037] A heat treatment method for a high-performance iron-based medium-entropy alloy, comprising the following steps:

[0038] S1. Ultrasonic cleaning: use the mechanical grinding method to remove the oxide scale on the surface of the Al, Cr, Fe, Ni alloy materials, then place them in different containers and add alcohol solution, ultrasonic cleaning, take out and dry the alcohol to obtain the ultrasonic treatment raw material;

[0039] S2. Ingredients: Weigh S1 according to the mole percentage of the elements to obtain Al: 3.5767g, Cr: 4.0545g, Fe: 20.4677g, Ni: 11.9010g and mix them;

[0040] S3: Melting: Put the raw materials mixed in S2 into the crucible of the vacuum non-consumable electric arc furnace, close the furnace door, and evacuate to 3×10 -3 Pa then recoils high-purity argon to 0.06Mpa; aft...

Embodiment 2

[0044] A high-performance iron-based medium-entropy alloy, comprising the following molar percentage components: Al: 17at%, Cr: 10at%, Fe: 36at%, Ni: 36at%, Mo: 1at%.

Embodiment 3

[0046] A high-performance iron-based medium-entropy alloy, comprising the following molar percentage components: Al: 17at%, Cr: 10at%, Fe: 36at%, Ni: 36at%, Mo: 0.5at%, W: 0.5at%.

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Abstract

The invention discloses a high-performance iron-based medium-entropy alloy and a preparation method thereof, and relates to the technical field of metal materials. The alloy comprises the following components in percentages by mole: 12-20at% of Al, 8-12at% of Cr, 35-55at% of Fe and 25-45at% of Ni. According to the high-performance iron-based medium-entropy alloy and the preparation method thereof, the phase selection rule of the iron-based medium-entropy alloy is defined, and scientific guidance and performance prediction of the alloy component design can be realized by utilizing the rule.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high-performance iron-based medium-entropy alloy and a heat treatment method thereof. Background technique [0002] As an important structural material, high-performance alloys play an irreplaceable role in both civil and national defense industries. The strength and plasticity of an alloy are the main manifestations of its mechanical properties, so improving the strength and plasticity is an important goal of alloy design. Medium-entropy alloys are a new type of structural material with a variety of elements as the matrix, which has a broad composition design space. Due to their outstanding mechanical properties such as high strength, high hardness, high wear resistance, and high corrosion resistance, medium-entropy alloys have shown broad prospects in theoretical research and industrial applications. Iron-based medium-entropy alloys that do not contain Co have relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/40C21D6/00C22C30/00C22F1/00
CPCC22C38/06C22C38/40C22C30/00C21D6/004C22F1/00
Inventor 王志军王健斌吴庆峰刘海龙李俊杰王锦程
Owner NORTHWESTERN POLYTECHNICAL UNIV