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A method and product thereof for preparing scandium-containing aluminum alloy parts by 3D printing

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, and reduce stress. Corrosion cracking tendency, optimization of quenching time, effect of improving mechanical properties

Active Publication Date: 2021-03-26
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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  • A method and product thereof for preparing scandium-containing aluminum alloy parts by 3D printing
  • A method and product thereof for preparing scandium-containing aluminum alloy parts by 3D printing

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 and manufacturing, and specifically discloses a method for preparing scandium-containing aluminum alloy parts by 3D printing and a product thereof. The method comprises the following steps: using a selective laser melting process to prepare a scandium-containing aluminum alloy to be processed; heating it to 400°C-800°C in an inert atmosphere and keeping it warm for 3h-5h, and then transferring it to water for quenching; quenching The finished parts are kept at 80° C. to 150° C. for a preset time, and cooled to room temperature to obtain scandium-containing aluminum alloy parts. The invention can make a large amount of fine Al diffusely distributed in the parts to be processed 3 Sc, Al 3 Zr particles, which have a coherent relationship with the matrix of the alloy, have a small degree of mismatch and high thermal stability, and can strongly pin dislocations and crystals, hinder dislocation movement and grain boundary migration, and make the alloy The solid solution is precipitated in the grain, and the grain boundary is a discontinuous distribution of crystal precipitates, which significantly improves the strength of scandium-containing aluminum alloy parts.

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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Patent Type & Authority Patents(China)
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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