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Microalloyed Ti-Zr-Hf-V-Nb-Ta refractory high-entropy alloy and preparation method thereof

A ti-zr-hf-v-nb-ta, high-entropy alloy technology, applied in the field of metal materials, can solve problems such as poor plasticity of refractory high-entropy alloys, and achieve the effects of high strength, simple operation and good plasticity

Active Publication Date: 2018-06-29
北京中辰至刚科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem of poor plasticity of existing refractory high-entropy alloys, the object of the present invention is to provide a microalloyed Ti-Zr-Hf-V-Nb-Ta refractory high-entropy alloy and its preparation method, mainly by adjusting the main composition The proportion of elements and adding a small amount of micro-alloying elements make the refractory high-entropy alloy have both good plasticity and high strength, and its density can be adjusted in a wide range; in addition, the mature melting and alloying process is adopted easy to prepare

Method used

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  • Microalloyed Ti-Zr-Hf-V-Nb-Ta refractory high-entropy alloy and preparation method thereof

Examples

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Embodiment 1

[0044] Ti 32 Zr 30 f 5 V 10 Nb 13 Ta 5 Al 5 The specific preparation steps of the refractory high-entropy alloy are as follows:

[0045] (1) Using elemental Ti, Zr, Hf, V, Nb, Ta and Al with a purity of more than 99.7wt% as raw materials, first remove the scale on the surface of the raw materials by grinding with a grinding wheel, and then use absolute ethanol to carry out ultrasonic vibration cleaning to obtain Clean raw materials, and according to the atomic percentage of Ti:Zr:Hf:V:Nb:Ta:Al=32:30:5:10:13:5:5, weigh out the clean raw materials with a total mass of (80±0.01)g raw material;

[0046] (2) Put the weighed elemental Hf, Nb and Ta into a water-cooled copper crucible in a high-vacuum non-consumable arc melting furnace, and then vacuumize until the vacuum in the melting furnace reaches 2.5×10 -3 After Pa, fill high-purity argon as a protective gas; before melting the alloy, first melt the pure titanium metal ingot to further reduce the oxygen content in the f...

Embodiment 2

[0051] Ti 42 Zr 15 f 15 Nb 12 Ta 10 Al 6 The specific preparation steps of the refractory high-entropy alloy are as follows:

[0052] (1) Using elemental Ti, Zr, Hf, Nb, Ta and Al with a purity of more than 99.7wt% as raw materials, first remove the scale on the surface of the raw materials by grinding with a grinding wheel, and then use absolute ethanol to carry out ultrasonic vibration cleaning to obtain clean Raw materials, and according to the atomic percentage of Ti:Zr:Hf:Nb:Ta:Al=42:15:15:12:10:6, weigh the clean raw materials with a total mass of (80±0.01) g;

[0053] (2) Put the weighed elemental Hf, Nb and Ta into a water-cooled copper crucible in a high-vacuum non-consumable arc melting furnace, and then vacuumize until the vacuum in the melting furnace reaches 2.5×10 -3 After Pa, fill high-purity argon as a protective gas; before melting the alloy, first melt the pure titanium metal ingot to further reduce the oxygen content in the furnace cavity, and then car...

Embodiment 3

[0058] Ti 30 Zr 8 f 20 Nb 8 Ta 30 Al 4 The specific preparation steps of the refractory high-entropy alloy are as follows:

[0059] (1) Using elemental Ti, Zr, Hf, Nb, Ta and Al with a purity of more than 99.7wt% as raw materials, first remove the scale on the surface of the raw materials by grinding with a grinding wheel, and then use absolute ethanol to carry out ultrasonic vibration cleaning to obtain clean Raw materials, and according to the atomic percentage of Ti:Zr:Hf:Nb:Ta:Al=30:8:20:8:30:4, weigh the clean raw materials with a total mass of (80±0.01) g;

[0060] (2) Put the weighed elemental Hf, Nb and Ta into a water-cooled copper crucible in a high-vacuum non-consumable arc melting furnace, and then vacuumize until the vacuum in the melting furnace reaches 2.5×10 -3 After Pa, fill high-purity argon as a protective gas; before melting the alloy, first melt the pure titanium metal ingot to further reduce the oxygen content in the furnace cavity, and then carry o...

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Abstract

The invention relates to a microalloyed Ti-Zr-Hf-V-Nb-Ta refractory high-entropy alloy and a preparation method thereof, and belongs to the technical field of metal materials. The refractory high-entropy alloy is endowed with good plasticity and high strength mainly by adjusting the ratio of main components and adding a small amount of microalloyed elements, and the density can be adjusted in a relatively wide range; in addition, during a preparation process, Hf, Nb, Ta and microalloyed elements other than Al at high melting points are pre-alloyed and smelted first, and then Ti, Zr, V and Al are added for final alloying smelting, thereby facilitating uniform mixing of a plurality of components with large differences in melting point, and ensuring the excellent comprehensive performance ofthe prepared refractory high-entropy alloy.

Description

technical field [0001] The invention specifically relates to a microalloyed Ti-Zr-Hf-V-Nb-Ta refractory high-entropy alloy with high strength and good plasticity and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] High-entropy alloys, also known as multi-principal alloys, are a new class of alloys developed in recent years. They are defined as alloys composed of five or more elements in equiatomic ratios or near equiatoms. The content of each major component is 5-35 at.%; In addition, other alloying elements can also be added for alloying, and the addition amount is less than 5 at.%. The multi-principal composition characteristics of high-entropy alloys are different from traditional alloys that have clear matrix elements (such as Fe-based alloys, Ti-based alloys, Al-based alloys, and Ni-based alloys, etc.), so they have a lot of properties in liquid or disordered solid solution states. High mixing entropy, an...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
CPCC22C1/02C22C30/00
Inventor 薛云飞曹堂清王本鹏王富耻王鲁刘旭东岳晗才鸿年
Owner 北京中辰至刚科技有限公司
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