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Carbonic high-entropy alloy coating and preparation method thereof

A high-entropy alloy and coating technology, applied in metal material coating process, coating and other directions, can solve the problem of poor hardness of high-entropy alloy coating

Active Publication Date: 2019-09-17
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, high-entropy alloy coatings designed based on high-entropy alloys generally have the problem of poor hardness.

Method used

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  • Carbonic high-entropy alloy coating and preparation method thereof
  • Carbonic high-entropy alloy coating and preparation method thereof
  • Carbonic high-entropy alloy coating and preparation method thereof

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preparation example Construction

[0026] The present invention also provides a method for preparing the carbon-containing high-entropy alloy coating described in the above technical solution, comprising the following steps:

[0027] Co powder, Cr powder, Cu powder, Fe powder, Mn powder and carbon powder are mixed and homogenized to obtain mixed powder;

[0028] drying the mixed powder to obtain a dry powder;

[0029] The dry powder is subjected to plasma cladding on the surface of the substrate to obtain the carbon-containing high-entropy alloy coating.

[0030] In the invention, Co powder, Cr powder, Cu powder, Fe powder, Mn powder and carbon powder are mixed and homogenized to obtain mixed powder. In the present invention, the particle size of the Co powder, Cr powder, Cu powder, Fe powder and Mn powder is independently preferably 80-200 mesh, more preferably 100-150 mesh, and the Co powder, Cr powder, Cu powder , the purity of Fe powder and Mn powder are preferably greater than 99.9%. In the present inve...

Embodiment 1

[0039] Co, Cr, Cu, Fe, Mn as the main element powder, the purity of the powder is greater than 99.9%, and the particle size is between 100 and 150 mesh;

[0040] Choose C as secondary element powder, the purity of the powder is greater than 99.9%, and the particle size is between 100 and 150 mesh;

[0041] Mixed powder ratio, the main element powders Co, Cr, Cu, Fe, Mn are carried out according to the equiatomic ratio of 1:1:1:1:1, after C powder is added to the main element mixed powder, the C in the carbon powder The molar ratio of element to Co is 0.2:1, and it is poured into a high-energy machine for homogenization. Ball milling parameters: the ratio of ball to material is 10:1, the rotational speed of the ball mill is 100r / min, the ball milling time is 4h, and argon protection is carried out during the ball milling process to obtain mixed powder.

[0042] The mixed powder is dried in a drying oven, the drying process: the temperature is 125° C., and the drying time is 2 ...

Embodiment 2

[0048] Co, Cr, Cu, Fe, Mn as the main element powder, the purity of the powder is greater than 99.9%, and the particle size is between 100 and 150 mesh;

[0049] Choose C as secondary element powder, the purity of the powder is greater than 99.9%, and the particle size is between 100 and 150 mesh;

[0050] Mixed powder ratio, the main element powders Co, Cr, Cu, Fe, Mn are carried out according to the equiatomic ratio of 1:1:1:1:1, after C powder is added to the main element mixed powder, the C in the carbon powder The molar ratio of element to Co is 0.1:1, and it is poured into a high-energy machine for homogenization. Ball milling parameters: the ratio of ball to material is 10:1, the rotational speed of the ball mill is 100r / min, the ball milling time is 4h, and argon protection is carried out during the ball milling process to obtain mixed powder.

[0051] The mixed powder was dried in a drying oven, the drying process: the temperature was 135° C., and the drying time was...

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Abstract

The invention provides a carbonic high-entropy alloy coating and a preparation method thereof, and belongs to the field of alloy coatings. Co, Cr, Cu, Fe and Mn are adopted as main elements, a carbon element (C) is adopted as a secondary element, C is an interval element and is added into the CoCrCuFeMn high-entropy alloy, the stacking fault energy of the alloy can be improved through the interval effect of the non-metal element, lattice distortion of the high-entropy alloy is improved, the solid solution strengthening effect is achieved, the carbon element can form a carbide with the main elements, for example, Fe-C, Cr-C M23C6 or M7C3 carbides are formed and dispersed into alloy tissue, the dispersion reinforcing effect is generated, and the high-entropy alloy hardness and abrasion resistance are improved; meanwhile, the high-entropy alloy structure formed by the main elements is BCC+FCC, a dual-phase solid solution is formed, after the C element is added, and the phase structure type cannot change; due to the dual-phase solid solution, the high-entropy alloy has the higher strength, and the hardness of the carbonic high-entropy alloy coating is improved.

Description

technical field [0001] The invention relates to the technical field of alloy coatings, in particular to a carbon-containing high-entropy alloy coating and a preparation method thereof. Background technique [0002] Metals and their alloys have a long history. In 2004, Cantor et al. proposed a new alloy design concept, and called such alloys multicomponent alloys and high entropy alloys. Unlike traditional alloys, high-entropy alloys are not based on one or two elements. In terms of composition, they contain at least five main elements, and the atomic ratio of each element is between 5% and 35% (at%). ; From the perspective of entropy, the mixing entropy of alloys includes atomic vibration entropy, magnetic moment entropy, electron random entropy and atomic arrangement entropy, among which atomic arrangement entropy is dominant. Entropy can only consider the entropy of atomic arrangement, that is, △S=Rlnn, when △S>1.5R, it is a high-entropy alloy. High-entropy alloys hav...

Claims

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Application Information

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IPC IPC(8): C22C30/02C23C24/10
CPCC22C30/02C23C24/103
Inventor 魏仕勇彭文屹谢仕芳邓晓华谌昀付青峰万珍珍
Owner NANCHANG UNIV
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