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A method for preparing molybdenum-tungsten-tantalum-titanium-zirconium high-entropy alloy

A high-entropy alloy, titanium-zirconium technology, applied in the field of high-entropy alloys, can solve the problems of uneven structure, coarse grain, high impurity content, etc., and achieve the effect of uniform structure, high material utilization rate and high purity

Active Publication Date: 2020-09-11
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the existing technical defects, the purpose of the present invention is to provide a method for preparing molybdenum-tungsten-tantalum-titanium-zirconium high-entropy alloys, which solves the problems of high impurity content, coarse grains, and uneven structure during the preparation of high-entropy alloys. question

Method used

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  • A method for preparing molybdenum-tungsten-tantalum-titanium-zirconium high-entropy alloy

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Effect test

Embodiment 1

[0035] Step 1. Material preparation: Use molybdenum flakes, tungsten powder, tantalum flakes, titanium flakes and zirconium flakes with a purity of 99.99% as raw materials, use a file or a grinding wheel to polish off the oxide layer on the surface of the flake raw materials, and use an ultrasonic cleaner to add anhydrous After ethanol cleans and dries the flaky raw material, calculate its component mass ratio by equimolar ratio, its total mass is 2.5Kg, according to Mo15.99%, W30.65%, Ta30.17%, Ti7.98%, The mass percent (wt%) of Zr15.21% is compounded. After fully mixing tungsten powder and tantalum flakes with a size of 300 mesh, put them into a crucible with a diameter of 60mm in the suspension melting furnace, put molybdenum flakes into the feeder, and place the evenly mixed zirconium flakes and titanium flakes in the feeder.

[0036] Step 2. Vacuumize the vacuum suspension melting furnace:

[0037] Turn on the mechanical pump, open the rough pumping valve, turn on the Ro...

Embodiment 2

[0048] Step 1. Material preparation: Use molybdenum flakes, tungsten powder, tantalum flakes, titanium flakes and zirconium flakes with a purity of 99.99% as raw materials, use a file or a grinding wheel to polish off the oxide layer on the surface of the flake raw materials, and use an ultrasonic cleaner to add anhydrous After ethanol cleans and dries the flaky raw material, calculate its component mass ratio by equimolar ratio, its total mass is 2.5Kg, according to Mo15.99%, W30.65%, Ta30.17%, Ti7.98%, The mass percent (wt%) of Zr15.21% is compounded. After fully mixing the 200 mesh tungsten powder and tantalum flakes, put them into a crucible with a diameter of 60mm in the suspension melting furnace, put the molybdenum flakes into the feeder, and place the evenly mixed zirconium flakes and titanium flakes in the feeder.

[0049] Step 2. Vacuumize the vacuum suspension melting furnace:

[0050] Turn on the mechanical pump, open the rough valve, turn on the Roots pump when t...

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Abstract

The invention discloses a method for preparing a molybdenum, tungsten, tantalum, titanium and zirconium high-entropy alloy. The high-purity tungsten powder, molybdenum blocks, tantalum blocks, titanium blocks, and zirconium blocks are weighed according to the stoichiometric ratio of the alloy elements, the tungsten powder and the tantalum blocks are mixed evenly, titanium blocks and zirconium blocks are mixed evenly, the molybdenum blocks are stored separately, the power is reduced stage by stage by using a vacuum suspended smelting furnace to smelt the raw material in batches, and the molybdenum, tungsten, tantalum, titanium and zirconium high-entropy alloy ingot is obtained after alloy refining, cooling, and repeated smelting. The method makes full use of the suspended smelting technology, the obtained molybdenum, tungsten, tantalum, titanium and zirconium high-entropy alloy has uniform organization and high purity, the mechanical properties are high, and the size is higher; and moreover, the method is simple in preparing process, easy to form, and high in speed and efficiency, and suitable for the industrial production of the molybdenum, tungsten, tantalum, titanium and zirconium high-entropy alloy.

Description

technical field [0001] The invention belongs to the field of high-entropy alloys, and in particular relates to a method for preparing molybdenum-tungsten-tantalum-titanium-zirconium high-entropy alloys. Background technique [0002] Traditional alloys are mainly composed of one or two elements, and the mechanical properties of the alloy can be improved by adding a small amount of other elements. However, high-entropy alloys generally have multiple principal elements, and the atomic percentage of each component is 5%-35%. High-entropy alloys have many unique characteristics compared with traditional alloys due to their simple structure due to their high mixing entropy effect. Molybdenum-tungsten-tantalum-titanium-zirconium high-entropy alloys have broad application prospects in many fields such as aerospace, military and industry due to their good mechanical properties, high strength, fatigue resistance, good electrical conductivity, and high temperature resistance. Great p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02
Inventor 何勇王传婷郭志平何源潘绪超焦俊杰郭磊方中马跃季铖
Owner NANJING UNIV OF SCI & TECH