Preparation method of high-strength 2000-series aluminum alloy based on selective laser melting forming technology

A laser melting and high-strength technology, which is applied in the direction of improving process efficiency, additive manufacturing, and improving energy efficiency, can solve problems such as poor weldability, limited industrial applications, and alloys that are prone to thermal cracks, and achieve high density and improved Solid solution strengthening effect, effect of increasing strength

Active Publication Date: 2020-05-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large distance between the liquidus line and the solidus line, the weldability is poor, resulting in hot cracks in the alloy, which greatly limits the further industrial application of this series of alloys.

Method used

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  • Preparation method of high-strength 2000-series aluminum alloy based on selective laser melting forming technology
  • Preparation method of high-strength 2000-series aluminum alloy based on selective laser melting forming technology
  • Preparation method of high-strength 2000-series aluminum alloy based on selective laser melting forming technology

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Effect test

Embodiment 1

[0027]Prepare the high-strength 2000-series aluminum composite components for 3D printing in the present invention, in terms of mass percentage: Cu: 5.0%, Li: 0.5%, Mg: 0.2%, Zr: 1%, Ti: 0.5%, and the balance for Al. The preparation method of the above-mentioned aluminum alloy powder is as follows: (1) raw material smelting, each element is weighed in proportion to the pure metal block raw material and placed in a vacuum induction furnace for heating and melting; (2) atomization powder making, the above-mentioned pre-alloyed metal after melting Transfer to the atomization tank, use helium to atomize and make powder; (3) Powder sieving: The above-mentioned pre-alloyed metal powder is screened to obtain a metal powder with an average particle size of 38 μm, and the particle size range is 11 μm ~68 μm. (4) Heat preservation and drying: put the above-mentioned sieved powder into a drying oven, heat preservation time is 12 hours, and heat preservation temperature is 95°C.

[0028...

Embodiment 2

[0031] Prepare the high-strength 2000 series aluminum composite components for 3D printing in the present invention, in terms of mass percentage: Cu: 3.5%, Li: 0.5%, Mg: 0.5%, Zr: 2%, Ti: 0.8%, and the balance for Al. The preparation method of the above-mentioned aluminum alloy powder is as follows: (1) raw material smelting, each element is weighed in proportion to the pure metal block raw material and placed in a vacuum induction furnace for heating and melting; (2) atomization powder making, the above-mentioned pre-alloyed metal after melting Transfer to the atomization tank, use helium to atomize and make powder; (3) Powder sieving: The above-mentioned pre-alloyed metal powder is screened to obtain a metal powder with an average particle size of 38 μm, and the particle size range is 11 μm ~68 μm. (4) Heat preservation and drying: put the above-mentioned sieved powder into a drying oven, heat preservation time is 12 hours, and heat preservation temperature is 95°C.

[003...

Embodiment 3

[0035] Prepare the high-strength 2000-series aluminum composite components for 3D printing in the present invention, in terms of mass percentage: Cu: 4%, Li: 0.7%, Mg: 1%, Zr: 1.5%, Ti: 0.7%, and the balance for Al. The preparation method of the above-mentioned aluminum alloy powder is as follows: (1) raw material smelting, each element is weighed in proportion to the pure metal block raw material and placed in a vacuum induction furnace for heating and melting; (2) atomization powder making, the above-mentioned pre-alloyed metal after melting Transfer to the atomization tank, use helium to atomize and make powder; (3) Powder sieving: The above-mentioned pre-alloyed metal powder is screened to obtain a metal powder with an average particle size of 38 μm, and the particle size range is 11 μm ~68 μm. (4) Heat preservation and drying: put the above-mentioned sieved powder into a drying oven, heat preservation time is 12 hours, and heat preservation temperature is 95°C.

[0036]...

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Abstract

The invention discloses a preparation method of a high-strength 2000-series aluminum alloy based on a selective laser melting forming technology. The preparation method of the high-strength 2000-series aluminum alloy based on the selective laser melting technology comprises the steps of weighing raw materials for smelting; sieving after atomizing to prepare powder; carrying out heat preservation treatment to obtain metal powder; performing 3D printing with the metal powder; and performing heat treatment to obtain the high-strength 2000-series aluminum alloy product. The composition and contentof the raw materials are, in mass percent, 2-8% of Cu, 0.5-2% of Li, 0.2-2% of Mg, 1-3% of Zr, 0.4-1.8% of Ti, and the balance Al. According to the preparation method, traditional 2000-series aluminum alloy components are optimized, the cost is low, solid solution strengthening, dispersion strengthening and fine grain strengthening are formed, the strength of the aluminum alloy is improved, and 3D printed Al-Cu-Li alloy powder is developed, and various mechanical properties are excellent after a printing piece is subjected to heat treatment.

Description

technical field [0001] The invention belongs to the technical field of selective laser melting forming, and in particular relates to a preparation method of high-strength 2000 series aluminum alloy based on selective laser melting forming technology. Background technique [0002] Metal-based additive manufacturing, also known as 3D printing (the two processes of special laser selective melting and laser melting deposition in this patent), is a potentially disruptive technology across multiple industries, including aerospace, biomedical and automotive industry. This is due to: First, 3D printing builds metal parts layer by layer, increasing design freedom and manufacturing flexibility, enabling complex geometries. This layered method has unique advantages in the integrated molding of complex structures and thin-walled components, eliminating the need for welding and riveting processes, no molds, shortening the design and production time, promoting customized development of p...

Claims

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Application Information

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IPC IPC(8): C22C21/16C22F1/057B22F3/105B33Y10/00B33Y70/00
CPCC22C21/16C22F1/057B33Y10/00B33Y70/00B22F10/00B22F10/34B22F10/36B22F10/28B22F10/64B22F10/366Y02P10/25
Inventor 李瑞迪徐荣袁铁锤
Owner CENT SOUTH UNIV
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