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3D printing process method for high-strength aluminum-zinc alloy

A 3D printing and process method 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 effect of improving performance, small linear expansion coefficient, and improving SLM processing performance

Inactive Publication Date: 2020-10-30
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-zinc alloy powder was obtained by gas atomization, and its chemical composition: the Zn content was 6.62%wt, the Si content was 5.80%wt, the Mg content was 1.89%wt, the Cu content was 1.54wt, the Zr content was 0.93%wt, and the rest were Al. The average particle size of the powder is 27.89 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 800mm / s, printing layer thickness 30μm, scanning spacing 120μm, scannin...

Embodiment 2

[0048] This embodiment provides a 3D printing process method for a high-strength aluminum-zinc alloy, including the following steps:

[0049] The high-strength aluminum-zinc alloy raw material is mixed evenly by heating and melting, and the chemical composition of the aluminum-zinc alloy powder used for 3D printing: Zn content is 0.50%wtwt, Si content is 10.00%wt, Mg content is 4.00%wt, Cu The content is 0.01%wt, the content of Zr is 0.01%wt, and the rest is Al;

[0050] The high-strength aluminum-zinc alloy in the molten state is aerosolized using a supersonic atomization nozzle with a fusion of laval and hartmann structure (for the specific structure of a supersonic atomization nozzle with a fusion of laval and hartmann structure, please refer to the fusion laval disclosed in Chinese patent CN201410553284.7 The supersonic atomizing nozzle with Hartmann structure produces high-quality aluminum-zinc alloy powder, and after drying (for 24h vacuum drying), the aluminum-zinc allo...

Embodiment 3

[0054] This embodiment provides a 3D printing process method for a high-strength aluminum-zinc alloy, including the following steps:

[0055] The high-strength aluminum-zinc alloy raw material is mixed evenly by heating and melting, and the chemical composition of the aluminum-zinc alloy powder used for 3D printing: Zn content is 11.00%wt, Si content is 0.10%wt, Mg content is 0.05%wt, Cu The content is 2.80%wt, the Zr content is 2.50%wt, and the rest is Al;

[0056] The high-strength aluminum-zinc alloy in the molten state is aerosolized using a supersonic atomization nozzle with a fusion of laval and hartmann structures (the specific structure of a supersonic atomization nozzle with a fusion of laval and hartmann structures can refer to the secondary laval and hartmann structure fusion supersonic atomization nozzle) to produce high-quality aluminum-zinc alloy powder, after drying (for 5h vacuum drying) to obtain aluminum-zinc alloy powder for 3D printing, the aluminum-zinc al...

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Abstract

The invention relates to a 3D printing process method for a high-strength aluminum-zinc alloy, and belongs to the technical field of 3D printing. Firstly, high-strength aluminum-zinc alloy raw materials are uniformly mixed by heating and melting; then high-quality aluminum-zinc alloy powder is prepared from the high-strength aluminum-zinc alloy in the molten state by adopting an air atomization technology, and is dried to obtain aluminum-zinc alloy powder for 3D printing; and printing parameters are adjusted, and 3D printing is performed according to the three-dimensional model data of a partin printing equipment with the inert gas introduced, so that a 3D printing product with the high-strength aluminum-zinc alloy as the raw material is obtained. Compared with the prior art, the productprinted through the process has the advantages that the relative density can reach 99% or above, the Vickers hardness can reach 150 HV or above, the tensile strength can reach 420 MPa or above, the elongation rate can reach 7%, the hardness of a sample can reach 170 HV or above after appropriate heat treatment, the tensile strength can be further improved to 510 MPa or above, and the elongation rate is kept at 5% 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-zinc 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 printi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C21/10B22F3/105B22F9/08B33Y10/00
CPCB22F9/082B33Y10/00C22C1/0416C22C21/10Y02P10/25
Inventor 尹春月严彪严鹏飞
Owner TONGJI UNIV
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