A high-entropy alloy amorphous powder for 3D printing and its preparation method

A technology of amorphous powder and high-entropy alloy, which is applied in the field of metal powder manufacturing, can solve the problems of unsuitable 3D printing powder materials, less amorphous phase formation, poor powder uniformity, etc., and achieve high corrosion resistance and high sphericity , the effect of high impact toughness

Active Publication Date: 2017-08-08
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese Patent Publication No. CN103252496A discloses an amorphous nanocrystalline high-entropy alloy amorphous powder and a preparation method thereof. It adopts a gas atomization method to prepare an amorphous The powder uniformity is poor, the sphericity is poor, the formation of amorphous phase is less, and the hollow powder is easier to generate, which is not suitable for the application of 3D printing powder materials.
However, the preparation of high-entropy alloy amorphous powder by uniform droplet pulse jet technology has not been reported yet.

Method used

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  • A high-entropy alloy amorphous powder for 3D printing and its preparation method
  • A high-entropy alloy amorphous powder for 3D printing and its preparation method
  • A high-entropy alloy amorphous powder for 3D printing and its preparation method

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Effect test

Embodiment 1

[0028] The six kinds of pure metal raw materials, Cu, Mn, Ti, Mo, Cr, and Fe from which the scale has been removed, are weighed in order according to the approximate atomic percentage, among which Cu: 15.5%, Mn: 15%, Ti: 16%, Mo: 17.5%, Cr: 18%, Fe: 18%, the total percentage is 100%. At the same time, ablation of low melting point metals should be considered. Put the weighed metal materials to be smelted into the alumina crucible according to their density from small to large, and then put the alumina crucible into the induction heater in the airtight container. Inert gas protection: vacuumize the closed container to below 3.0×10 -2 MPa, and then filled with high-purity inert protective gas. Under the protection of inert gas, start the induction heater to melt the raw materials. The melting power is 10KW, the melting current is 28A, the melting time is 40min, the holding time is 20min, and the superheating degree is 100℃, supplemented by electromagnetic stirring to reduce th...

Embodiment 2

[0032] The six pure metal raw materials, Cu, Mn, Ti, Mo, Cr, and Fe, which have been removed from the scale, are weighed in order according to the approximate atomic percentage, among which Cu: 18%, Mn: 18%, Ti: 16%, Mo: 18%, Cr: 15%, Fe: 15%, the total percentage is 100%. At the same time, due consideration should be given to the ablation of low melting point metals. Put the weighed metal materials to be smelted into the alumina crucible according to their density from small to large, and then put the alumina crucible into the induction heater in the airtight container. Inert gas protection: vacuumize the airtight container to below 3.0×10 -2 MPa, and then filled with high-purity inert protective gas. Under the protection of inert gas, start the induction heater to melt the raw materials. The melting power is 10KW, the melting current is 28A, the melting time is 40min, the holding time is 20min, and the superheating degree is 100℃, supplemented by electromagnetic stirring t...

Embodiment 3

[0035] The pure metal raw materials such as Cu, Mn, Ti, Mo, Cr, Fe, etc. that have been removed from the scale are weighed in order according to the approximate atomic percentage, among which Cu: 18%, Mn: 18%, Ti: 18%, Mo: 16 %, Cr: 15%, Fe: 15%, the total percentage is 100%. At the same time, ablation of low melting point metals should be considered. Put the weighed metal materials to be smelted into the alumina crucible according to their density from small to large, and then put the alumina crucible into the induction heater in the airtight container. Inert gas protection: vacuumize the closed container to below 3.0×10 -2 MPa, and then filled with high-purity inert protective gas. Under the protection of inert gas, start the induction heater to melt the raw materials. The melting power is 10KW, the melting current is 28A, the melting time is 40min, the holding time is 20min, and the superheating degree is 100℃, supplemented by electromagnetic stirring to reduce the segreg...

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Abstract

The invention relates to a high-entropy alloy amorphous powder for 3D printing and a preparation method thereof, belonging to the technical field of metal powder preparation. Its equal atomic percentage composition is as follows: Cu: 15.5‑18%, Mn: 15‑18%, Ti: 16‑18%, Mo: 15‑18%, Cr: 15‑18%, Fe: 15‑18%, total The percentage is 100%. The method of uniform droplet pulse injection is adopted; the weighed metal raw materials are put into the crucible, filled with circulating inert gas protection for melting, the melting power is 10KW, the current is 28A, and the time is 40min, supplemented by electromagnetic stirring to make the alloy fully melt. ;Using the uniform droplet pulse injection technology, the pulse generator generates gas pulses of corresponding frequency and pressure, controls the cooling rate, and prepares high-entropy alloy amorphous powder with an average particle size of less than 50 μm and high sphericity, and the microhardness reaches 1200HV . Consumables mainly used for 3D printing.

Description

technical field [0001] The invention belongs to the field of metal powder production. Background technique [0002] High-entropy alloy is a new type of alloy system developed on the basis of intermetallic compounds and bulk amorphous materials. It is composed of no less than 5 main alloying elements, each of which occupies a high percentage. When the atomic percentage of an element exceeds 50%, the structure formed is a simple solid solution, and the alloying elements have a high mixing entropy, so they are called high-entropy alloys. Due to the special microstructure and structure, this type of alloy has high strength, high hardness, high corrosion resistance, high heat resistance, special electrical and magnetic properties, etc., and has broad application prospects. [0003] Amorphous alloy, namely metallic glass, has the structural characteristics of long-range disorder and short-range order, and belongs to thermodynamic metastable state, and the three-dimensional space ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/10B22F9/08B33Y70/00
CPCB22F9/008B22F2009/0816C22C45/10
Inventor 徐轶陈亚
Owner SOUTHWEST JIAOTONG UNIV
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