Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

An aluminum-silicon alloy, 3D printing technology, applied in the field of 3D printing, can solve the problems of inability to mass production, poor product performance, complex preparation technology, etc., to achieve narrow particle size distribution, excellent mechanical properties, fine and uniform grains Effect

Active Publication Date: 2021-12-31
TONGJI UNIV
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the powder raw material preparation technology currently used in China either produces poor product performance, or the preparation technology is complicated, the cost is high, and it cannot be mass-produced

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 3D printing process method of high-strength aluminum-silicon alloy
  • 3D printing process method of high-strength aluminum-silicon alloy
  • 3D printing process method of high-strength aluminum-silicon alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] According to the mass ratio of 4:1, the aluminum-silicon raw materials were taken respectively, heated and melted in vacuum at 660°C and kept for half an hour, and then the high-speed compressed airflow was used to impact the molten aluminum-silicon alloy flow, and the specific structure of the supersonic atomizing nozzle combined with the laval and hartmann structure could be Refer to the supersonic atomizing nozzle disclosed in Chinese patent CN201410553271.X, which is a fusion of two-stage laval and hartmann structures. The atomizing gas is high-purity argon, and the gas pressure during atomization is 2MPa. The tight coupling method is adopted to ensure negative pressure at the outlet. At 0.5kPa, the primary resonance gas frequency is 100kHz. After the gas is atomized, the powder with a particle size of 10-45 μm is screened out by cyclone classification and collected to obtain aluminum-silicon alloy powder.

[0040] The composition of Al-Si alloy powder was analyzed ...

Embodiment 2

[0044] A preparation method for aluminum-silicon alloy powder for 3D printing, comprising the following steps:

[0045] The aluminum-silicon alloy raw material is heated and melted in a vacuum within the range of 630°C for a period of time, so that it is fully mixed and evenly mixed. The ratio of silicon and aluminum in the aluminum-silicon alloy raw material meets the Si content of the final aluminum-silicon alloy powder used for 3D printing. %wt, the Al content is 84.6%wt, the Fe content is 0.28wt%, and the Cu content is 0.12wt%;

[0046] Use high-speed compressed airflow (high-purity argon gas) to impact the molten aluminum-silicon alloy flow. The gas pressure of the high-speed compressed airflow is 1.6MPa. The tight coupling method is adopted to ensure that the negative pressure at the outlet is 0.3kPa, and it is broken into aerosol. The high-speed compressed airflow impinges on the molten aluminum-silicon alloy flow using a supersonic atomizing nozzle that combines laval ...

Embodiment 3

[0051] A preparation method for aluminum-silicon alloy powder for 3D printing, comprising the following steps:

[0052] The aluminum-silicon alloy raw material is heated and melted in a vacuum within the range of 660°C for a period of time to make it fully mixed and uniform. The proportion of silicon and aluminum in the aluminum-silicon alloy raw material meets the Si content of the final aluminum-silicon alloy powder used for 3D printing. %wt, Al content is 79.8%wt, Fe content is 0.1wt%, Cu content is 0.1wt%;

[0053] Use high-speed compressed airflow (high-purity argon gas) to impact the molten aluminum-silicon alloy flow. The gas pressure of the high-speed compressed airflow is 2.00MPa, and the tight coupling method is adopted to ensure that the negative pressure at the outlet is 0.4kPa, and it is fragmented to obtain aerosol The high-speed compressed airflow impinges on the molten aluminum-silicon alloy flow using a supersonic atomizing nozzle that combines laval and hartm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Vickers hardnessaaaaaaaaaa
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a 3D printing process for a high-strength aluminum-silicon alloy, and belongs to the technical field of 3D printing. Firstly, the aluminum-silicon alloy raw material is heated and melted in a vacuum to make it fully mixed evenly, and the high-speed compressed airflow is used to impact the molten aluminum-silicon alloy flow to break it into gas atomized particles. Alloy powder, sieve the aluminum-silicon alloy powder; then after the powder is dried, adjust the printing parameters, and perform 3D printing according to the 3D model data of the part in the printing equipment with inert gas. Compared with the prior art, the method of the invention can print a high-strength aluminum-silicon alloy product with a smooth surface and no cracks, and its density can reach more than 98% of the true density of the powder. The Vickers hardness can reach 160-200HV, the tensile strength can reach 450-520MPa, and the bending strength can reach 600-750MPa, all of which are higher than cast aluminum-silicon alloy products and other 3D printed aluminum-silicon alloy products with the same composition. This method can also be used to print complex aluminum-silicon alloy parts, which has obvious technical advantages.

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-silicon 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 pri...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F10/28B22F9/08C22C21/02C22C1/04B22F1/00B33Y10/00B33Y70/00
CPCB22F1/0003B22F9/082C22C21/02C22C1/0416B33Y10/00B33Y70/00B22F2009/0824B22F2009/0844B22F10/00B22F10/362B22F10/36B22F10/38B22F10/32B22F10/366B22F10/28Y02P10/25
Inventor 尹春月严彪严鹏飞
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com