3D printing process method of high-strength aluminum-magnesium alloy

An aluminum-magnesium alloy and 3D printing technology, applied in the field of 3D printing, can solve the problems of high price, low content of rare earth elements, unfavorable large-scale promotion and application, etc., and achieve the effects of hindering grain growth, improving performance, and improving SLM performance

Active Publication Date: 2020-11-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of rare earth elements is low and the price is expensive, which is not conducive to large-scale promotion and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The aluminum-magnesium alloy powder was obtained by gas atomization, and its chemical composition: Mg content was 5.72%wt, Zr content was 1.48%wt, Si content was 1.24%wt, Mn content was 0.62%wt, Zn content was 0.43%wt, and the rest for Al. The average particle size of the powder is 25.95 μm, more than 90% of the powder particles are spherical or quasi-spherical, and the powder fluidity is good. First dry the powder in a vacuum oven at 70°C for 12 hours, then put the powder into the chamber of a Hanbang HBD-SLM100 printer (the diameter of the laser beam spot used is about 50 μm), and pass high-purity argon gas to make the chamber The oxygen content in the chamber is less than 0.1%, and then laser scanning is performed twice to preheat the substrate, and then the powder is printed according to the 3D model of the part. The printing parameters were set as laser power 200W, scanning rate 750mm / s, printing layer thickness 30μm, scanning spacing 130μm, scanning strategy as c...

Embodiment 2

[0048] This embodiment provides a 3D printing process for high-strength aluminum-magnesium alloys, comprising the following steps:

[0049] High-strength aluminum-magnesium alloy raw materials (chemical composition: Mg content is 4.00%wt, Zr content is 1.50%wt, Si content is 1.00%wt, Mn content is 1.00%wt, Zn content is 1.00%wt, and the rest is Al) through Heat and melt to make it evenly mixed;

[0050] The high-strength aluminum-magnesium alloy in the molten state is made of high-quality aluminum-magnesium alloy powder by gas atomization technology, and after 15 hours of vacuum drying, the aluminum-magnesium alloy powder for 3D printing is obtained. The aluminum-magnesium alloy powder for 3D printing The particle size is between 10-60μm, more than 90% of the powder particles are spherical or quasi-spherical, the powder particle size is uniform, the fluidity is good, it will not be oxidized during the preparation process, and the powder quality is excellent;

[0051] Adjust t...

Embodiment 3

[0055] This embodiment provides a 3D printing process for high-strength aluminum-magnesium alloys, comprising the following steps:

[0056] High-strength aluminum-magnesium alloy raw materials (chemical composition: Mg content is 1.00%wt, Zr content is 3.00%wt, Si content is 0.05%wt, Mn content is 2.00%wt, Zn content is 0.01%wt, and the rest is Al) through Heat and melt to make it evenly mixed;

[0057] The high-strength aluminum-magnesium alloy in the molten state is made of high-quality aluminum-magnesium alloy powder by gas atomization technology, and after 5 hours of vacuum drying, the aluminum-magnesium alloy powder for 3D printing is obtained. The aluminum-magnesium alloy powder for 3D printing The particle size is between 10-60μm, more than 90% of the powder particles are spherical or quasi-spherical, the powder particle size is uniform, the fluidity is good, it will not be oxidized during the preparation process, and the powder quality is excellent;

[0058] Adjust th...

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Abstract

The invention relates to a 3D printing process method of a high-strength aluminum-magnesium alloy, and belongs to the technical field of 3D printing. Firstly, high-strength aluminum-magnesium alloy raw materials are mixed evenly through heating and melting; then high-quality aluminum-magnesium alloy powder is prepared from the high-strength aluminum-magnesium alloy in a molten state through a gasatomization technology, and aluminum-magnesium alloy powder for 3D printing is obtained after drying; and printing parameters are adjusted, 3D printing is carried out according to 3D model data of parts in printing equipment with inert gas introduced, and a 3D printing product with the high-strength aluminum-magnesium alloy as a raw material is obtained. Compared with the prior art, as for the product printed through the process method, the relative density can reach 99% or above, the Vickers hardness can reach 110 HV or above, the tensile strength can reach 430 MPa or above, the elongation can reach 21%, through proper heat treatment, the Vickers hardness of a sample can reach 150 HV or above, the tensile strength can be further increased to 520 MPa or above, and the elongation is maintained at 17% or above.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a 3D printing process method of a high-strength aluminum-magnesium alloy. Background technique [0002] 3D printing is a preparation technology that uses three-dimensional model data to obtain products with complex shapes through layer-by-layer accumulation. Compared with the preparation methods of traditional plastics, ceramics, metals and alloys, and composite materials, 3D printing technology has a series of advantages such as the ability to prepare high-precision and complex-shaped products, save raw materials, and save costs, and has a good application prospect. Currently commonly used 3D printing methods include direct three-dimensional printing technology (3DP), selective laser melting technology (SLM), stereolithography technology (SLA), fused deposition technology (FDM), etc., among which selective laser melting technology (SLM) It is widely used in 3D p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/24B22F9/08B22F1/00C22C21/08C22C21/00B33Y10/00B33Y50/02B33Y70/00
CPCB22F3/24B22F9/082C22C21/08C22C21/00B33Y10/00B33Y50/02B33Y70/00B22F2003/248B22F1/065Y02P10/25
Inventor 尹春月严彪严鹏飞
Owner TONGJI UNIV
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