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Abrasion-resistant and corrosion-resistant CrVNiHfNb high-entropy alloy and preparation method thereof

A high-entropy alloy and metal material technology, applied in the field of alloy materials and their preparation, can solve the problems of reduced mechanical properties and difficult application of alloys, and achieve strong corrosion resistance, high hardness, and broad application prospects

Active Publication Date: 2018-06-19
XIANGTAN UNIV
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Problems solved by technology

The traditional crystallographic theory believes that adding too much trace alloying elements will lead to the formation of various intermetallic compounds and other complex organizational structures, which will reduce the mechanical properties of the alloy and make it difficult to apply in practice

Method used

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Embodiment Construction

[0016] The preparation method and process performance of the present invention are illustrated by specific specific examples below, and those skilled in the art can fully understand the advantages and functions of the present invention from the contents disclosed in this specification.

[0017] 1. CrVNiHfNb high entropy alloy composition design.

[0018] A CrVNiHfNb high-entropy alloy in this embodiment is composed of Cr, V, Ni, Hf and Nb five elements, wherein the molar ratio of Cr:V:Ni:Hf:Nb is 1:1:1: 1:1.

[0019] 2. CrVNiHfNb high entropy alloy material selection.

[0020] The purity of the Cr, V, Ni, Hf and Nb materials used in the high-entropy alloy is not less than 99.7%, and the raw materials are in the form of flakes, blocks or large particles except powder.

[0021] 3. The preparation method of CrVNiHfNb high entropy alloy.

[0022] The preparation method of a CrVNiHfNb high-entropy alloy of the present embodiment, the preparation steps are as follows: (1) Ultraso...

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Abstract

The invention relates to an abrasion-resistant and corrosion-resistant CrVNiHfNb high-entropy alloy and a preparation method thereof. The high-entropy alloy comprises the following components: Cr, V,Ni, Hf and Nb, wherein the mole ratio of all the elements is 1:1:1:1:1 or equal. According to the preparation method, a high-hardness and high-corrosion-resistance high-entropy alloy material is prepared through a non-consumable vacuum electric arc melting process, so as to make up for the shortcomings of a conventional alloy as well as meet the future high-hardness, corrosion-resistant and high-temperature-resistant material application requirements. A main process of the preparation method comprises the following steps: (1) ultrasonic treatment; (2) material weighing; (3) sample charging; (4) high vacuum pumping; (5) titanium smelting for oxygen removal; (6) alloy smelting; and (7) alloy casting. The prepared CrVNiHfNb high-entropy alloy is of a body-centered cubic and face-centered cubic structure, has the advantages of high hardness, high corrosion resistance and the like, as well as has very good application prospects in the fields of abrasion resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a high-entropy alloy material and a preparation method thereof, in particular to a high-hardness, corrosion-resistant CrVNiHfNb high-entropy alloy and a preparation method thereof, belonging to the technical field of alloy materials and preparation thereof. Background technique [0002] The traditional design concept of alloy is based on one or two elements, adding a small amount of other elements to form an alloy, such as aluminum alloy, magnesium alloy, stainless steel and bulk amorphous alloy. The traditional crystallographic theory believes that adding too much trace alloying elements will lead to the formation of various intermetallic compounds and other complex organizational structures, which will reduce the mechanical properties of the alloy and make it difficult to apply in practice. In the 1990s, Taiwan scholar Ye Junwei took the lead in proposing a novel alloy design concept, which is composed of five or more main me...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
CPCC22C1/02C22C30/00
Inventor 肖逸锋邓季龙夏秀艳许艳飞吴靓钱锦文欧耀辉周水波唐少让叶明强曾毅夫周益辉
Owner XIANGTAN UNIV