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Method for preparing scandium-containing aluminum alloy part by 3D printing and product thereof

A scandium-aluminum alloy, 3D printing technology, applied in the direction of additive manufacturing, process efficiency improvement, additive processing, etc., can solve the problems of strength, toughness, plasticity, high temperature performance, corrosion resistance and geometric characteristics, etc., to reduce stress Corrosion cracking tendency, strong precipitation strengthening and recrystallization inhibition effect, optimization effect of quenching time

Active Publication Date: 2020-03-24
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on 3D printing scandium-containing aluminum alloys is still in its infancy, and the process parameters in the preparation process have a great influence on strength, toughness, plasticity, high temperature performance, corrosion resistance and geometric characteristics.

Method used

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  • Method for preparing scandium-containing aluminum alloy part by 3D printing and product thereof
  • Method for preparing scandium-containing aluminum alloy part by 3D printing and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (a) Prepare scandium-containing aluminum alloy parts to be processed by selective laser melting process, which includes the following components, Mg: 4%, Ag: 0.8%, Mn: 0.5%, Zr: 0.1%, Zn: 1.0%, Ti: 0.05%, Sc: 0.2%, the balance is Al;

[0032] (b) Put the scandium-containing aluminum alloy in a high-temperature box-type furnace, raise the temperature of the high-temperature box-type furnace to 400°C at a heating rate of 480°C / h under an inert atmosphere and keep it for 4 hours, and then transfer it to water within 10s~20s Quenching for 5 minutes;

[0033] (c) keeping the quenched parts at 100° C. for 4 hours, and then cooling to room temperature, so as to obtain scandium-containing aluminum alloy parts.

Embodiment 2

[0035] (a) Prepare scandium-containing aluminum alloy parts to be processed by selective laser melting process, which includes the following components, Mg: 4.5%, Ag: 0.3%, Mn: 0.1%, Zr: 0.3%, Zn: 0.4%, Ti: 0.01%, Sc: 0.15%, the balance is Al;

[0036] (b) Put the scandium-containing aluminum alloy in a high-temperature box-type furnace, raise the temperature of the high-temperature box-type furnace to 800°C at a heating rate of 480°C / h under an inert atmosphere and keep it warm for 3 hours, and then transfer it to water within 10s~20s Quenching for 10min;

[0037] (c) keeping the quenched parts at 80° C. for 5 hours, and then cooling to room temperature, so as to obtain scandium-containing aluminum alloy parts.

Embodiment 3

[0039] (a) Prepare scandium-containing aluminum alloy parts to be treated by selective laser melting process, which includes the following components, Mg: 5.0%, Ag: 1.5%, Mn: 0.6%, Zr: 0.2%, Zn: 0.7%, Ti: 0.08%, Sc: 0.05%, the balance is Al;

[0040] (b) Put the scandium-containing aluminum alloy in a high-temperature box-type furnace, raise the temperature of the high-temperature box-type furnace to 600°C at a heating rate of 480°C / h under an inert atmosphere and keep it warm for 5h, and then transfer it to water within 10s~20s Quenching 8min;

[0041](c) keeping the quenched parts at 150° C. for 8 hours, and then cooling to room temperature, so as to obtain scandium-containing aluminum alloy parts.

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Abstract

The invention belongs to the field of alloy forming manufacturing, and particularly discloses a method for preparing a scandium-containing aluminum alloy part by 3D printing and a product thereof. Themethod comprises the following steps that a scandium-containing aluminum alloy part to be treated is prepared by adopting a selective laser melting process; the part is heated to 400 DEG C-800 DEG Cunder an inert atmosphere and subjected to heat preservation for 3h-5h, and then the part is transferred to water for quenching; and the quenched part is subjected to heat preservation at 80 DEG C-150DEG C for a preset time, and cooling is conducted to room temperature to obtain the scandium-containing aluminum alloy part. According to the method, a large amount of fine Al3Sc and Al3Zr particlesdiffused in the part to be treated have a coherent relationship with a matrix of the alloy, the relatively small mismatching degree and the higher thermal stability are achieved, moreover, dislocationand crystal can be strongly pinned, dislocation motion and grain boundary migration are prevented, the solid solution in the alloy is precipitated in the crystal, the crystal boundary is a crystal precipitation phase of intermittent distribution, and the strength of the scandium-containing aluminum alloy part is remarkably improved.

Description

technical field [0001] The invention belongs to the field of alloy forming and manufacturing, and more specifically relates to a method for preparing scandium-containing aluminum alloy parts by 3D printing and its products. Background technique [0002] Scandium (Sc) is the 21st element in the periodic table, one of the rare earth metals, the melting point of metal scandium is 1541 ℃, and the density is 2.989g / cm 3 , the chemical properties are very active. Scandium is added to aluminum alloy in the form of alloying elements, which can exhibit many excellent properties, such as melt purification, improvement of as-cast structure and inhibition of recrystallization. The addition of trace scandium elements to aluminum alloys shows a strong performance strengthening effect, which can comprehensively improve the strength, toughness, plasticity, high temperature performance, corrosion resistance and welding performance of aluminum alloys. [0003] Powder metallurgy technology c...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F3/24C22C21/06C22F1/047C22F1/02B33Y40/20B33Y80/00
CPCB22F3/24C22C21/06C22F1/047C22F1/02C22F1/002B33Y40/00B33Y80/00B22F2003/248B22F2998/10B22F10/00B22F10/32B22F10/28B22F10/64B22F10/36B22F10/366Y02P10/25
Inventor 文世峰刘洋周燕史玉升陈道兵洪青锋李霏王楠
Owner HUAZHONG UNIV OF SCI & TECH
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