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A strong corrosion-resistant non-equiatomic ratio high-entropy alloy and its preparation method

A high-entropy alloy and atomic ratio technology, which is applied in the field of atomic ratio high-entropy alloy and its preparation, can solve the problems of expensive strategic elements, etc., and achieve the effects of cost reduction, excellent corrosion resistance, and simple preparation process

Active Publication Date: 2021-04-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fe 40Mn40Co10Cr10(at.%) high-entropy alloy has good comprehensive properties, but contains expensive strategic element Co

Method used

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  • A strong corrosion-resistant non-equiatomic ratio high-entropy alloy and its preparation method
  • A strong corrosion-resistant non-equiatomic ratio high-entropy alloy and its preparation method
  • A strong corrosion-resistant non-equiatomic ratio high-entropy alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a strong corrosion-resistant non-equiatomic ratio high-entropy alloy material, comprising the following steps:

[0034] (1) According to the atomic ratio of 35:10:20:35, Fe, Mn, Cr, and Ni metal block particles were weighed in total to 60g;

[0035] (2) Put the metal particles prepared in step (1) in the high-purity Ar gas environment of the high-vacuum electric arc melting furnace, the vacuum degree is -0.5Pa, the electric arc melting current is 250A, at least 5 times of repeated melting to ensure the uniformity of the alloy composition;

[0036] (3) Casting the alloy ingot smelted in step (2), in a high-temperature heat treatment furnace, the temperature is set to 1000° C., kept for 12 hours, and then taken out and quenched to normal temperature;

[0037] (4) Processing the homogenized heat-treated alloy ingot in step (3) into a rod by hot forging, and the forging temperature is 800° C.;

[0038] (5) The rod obtained by forging in step (4) is sub...

Embodiment 2

[0044] A method for preparing a strong corrosion-resistant non-equiatomic ratio high-entropy alloy material, comprising the following steps:

[0045] (1) According to the atomic ratio of 35:10:20:35, Fe, Mn, Cr, and Ni metal block particles were weighed in total to 60g;

[0046] (2) Put the metal particles prepared in step (1) in the high-purity Ar gas environment of the high-vacuum electric arc melting furnace, the vacuum degree is -0.5Pa, the electric arc melting current is 250A, at least 5 times of repeated melting to ensure the uniformity of the alloy composition;

[0047] (3) Casting the alloy ingot smelted in step (2), in a high-temperature heat treatment furnace, the temperature is set to 1000° C., kept for 12 hours, and then taken out and quenched to normal temperature;

[0048] (4) Processing the homogenized heat-treated alloy ingot in step (3) into a rod by hot forging, and the forging temperature is 800° C.;

[0049] (5) The rod obtained by forging in step (4) is s...

Embodiment 3

[0055] A method for preparing a strong corrosion-resistant non-equiatomic ratio high-entropy alloy material, comprising the following steps:

[0056] (1) According to the atomic ratio of 35:10:20:35, Fe, Mn, Cr, and Ni metal block particles were weighed in total to 60g;

[0057] (2) Put the metal particles prepared in step (1) in the high-purity Ar gas environment of the high-vacuum electric arc melting furnace, the vacuum degree is -0.5Pa, the electric arc melting current is 250A, at least 5 times of repeated melting to ensure the uniformity of the alloy composition;

[0058] (3) Casting the alloy ingot smelted in step (2), in a high-temperature heat treatment furnace, the temperature is set to 1000° C., kept for 12 hours, and then taken out and quenched to normal temperature;

[0059] (4) Processing the homogenized heat-treated alloy ingot in step (3) into a rod by hot forging, and the forging temperature is 800° C.;

[0060] (5) The rod obtained by forging in step (4) is s...

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Abstract

The invention relates to the technical field of high-entropy alloys and their preparation, and discloses a high-entropy alloy with strong corrosion resistance and non-isoatomic ratio and a preparation method thereof. The raw materials for preparation are Fe, Mn, Cr, and Ni metal particles. The preparation methods include but are not limited to High vacuum arc melting method and thermal processing and heat treatment process. The details are as follows: the above-mentioned metal powder is weighed according to the set ratio, melted and solidified in a high-vacuum arc melting furnace, and prepared into a non-equiatomic ratio high-entropy alloy metal. In order to ensure the uniformity of the alloy composition during the melting process, the alloy The block is repeatedly smelted. The as-cast non-equal atomic ratio high-entropy alloy prepared at the initial stage was homogenized in a high-temperature heat treatment furnace, followed by water quenching, and the high-entropy alloy ingot was hot-forged. The hot-forged sample was cooled with air, and then Then put it into a high-temperature heat treatment furnace for recovery and recrystallization annealing, and a non-equal atomic ratio high-entropy alloy with strong corrosion resistance can be obtained. The non-equiatomic ratio high-entropy alloy prepared by the invention has excellent corrosion resistance and simple preparation process.

Description

technical field [0001] The invention belongs to the technical field of high-entropy alloys and their preparation, and in particular relates to a strong corrosion-resistant non-isoatomic ratio high-entropy alloy and a preparation method thereof. Background technique [0002] For a long time, the design concept of metal alloy system has been based on one or two elements as the main component, such as iron-based, aluminum-based, copper-based, magnesium-based alloys, etc., and a small amount of other elements are used to improve performance. Alloys are usually changed by adding a small amount of certain elements to change the properties of the alloy. For example, aluminum alloys are often used as decorative materials in daily life. Aluminum is the main element, and a small amount of elements such as magnesium, zinc, and copper are added to the alloy to make it Alloys have higher strength. The steel materials such as tool steel, stainless steel, and spring steel currently used a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/00
CPCC22C1/02C22C30/00C22F1/002
Inventor 廖恒成周军陈浩黄艾婧
Owner SOUTHEAST UNIV
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