Metal powder for 3D printing of high-strength aluminum alloy and printing method and application thereof

A 3D printing and metal powder technology, applied in the field of 3D printing, can solve the problems of low density of printed components, low laser absorption rate, high thermal conductivity, etc., achieve high dimensional accuracy and high performance control, simple processing procedures, slippage the effect of increasing

Active Publication Date: 2019-01-04
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the more mature 3D printing method is laser 3D printing. However, compared with other metal materials such as stainless steel, high-temperature alloys, and titanium alloys, aluminum alloys have higher reflectivity to laser light, lower absorption rate to laser light, and are easy to oxidize and With high thermal conductivity, cracking, warping, deformation, spheroidization and other phenomena often occur during the 3D printing process. Printed components have problems such as low density, embrittlement, warping, and cracking, which is the most difficult in 3D printing technology. one of the printed materials

Method used

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  • Metal powder for 3D printing of high-strength aluminum alloy and printing method and application thereof
  • Metal powder for 3D printing of high-strength aluminum alloy and printing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] A metal powder for 3D printing high-strength aluminum alloys, including aluminum alloy micro-particles, the surface of the aluminum alloy micro-particles is sequentially decorated with graphene and nano-enhanced particles from the inside to the outside; the amount of graphene added is the total mass of the metal powder 0.3-0.6% of the metal powder, the total added amount of nano-enhanced particles is 1-3% of the total mass of the metal powder; the particle size of the aluminum alloy micro-particles is 10 μm-60 μm; the particle size of the nano-enhanced particles is 30nm-60nm.

[0042] In terms of mass percentage, the composition content of elements in the aluminum alloy micro-particles is: Zn: 4.7-6.0wt%, Mg: 1.5-2.5wt%, Cu: 1.6-2.0wt%, Cr: 0.15-2.0wt% , Fe: 0.15-0.18wt%, Mn: 0.01-0.03wt%, Yb: 0.3-0.6wt%, Si: ≤0.08wt%, Ti≤0.01wt%, and the balance is Al.

[0043] Preferably, the nano-enhanced particles include ZrB 2 Nanoparticles and / or TiB 2 nanoparticles.

[0044] P...

Embodiment 1

[0058] A metal powder for 3D printing high-strength aluminum alloys, including aluminum alloy micro-particles, the surface of the aluminum alloy micro-particles is sequentially decorated with graphene and nano-enhanced particles from the inside to the outside; the amount of graphene added is the total mass of the metal powder 0.4% of the total amount of nano-reinforced particles added is 2% of the total mass of the metal powder; the particle size of the aluminum alloy micro-particles is 30 μm-50 μm; the particle size of the nano-reinforced particles is 30nm-60nm.

[0059] In terms of mass percentage, the composition content of elements in the aluminum alloy micro-particles is: Zn: 5wt%, Mg: 2wt%, Cu: 1.8wt%, Cr: 1.0wt%, Fe: 0.16wt%, Mn: 0.02 wt%, Yb: 0.5wt%, Si: ≤0.08wt%, Ti≤0.01wt%, and the balance is Al.

[0060] The nano-enhanced particles described in this example include ZrB 2 Nanoparticles and TiB 2 nanoparticles.

[0061] The metal powder for 3D printing high-strengt...

Embodiment 2

[0074] A metal powder for 3D printing high-strength aluminum alloys, including aluminum alloy micro-particles, the surface of the aluminum alloy micro-particles is sequentially decorated with graphene and nano-enhanced particles from the inside to the outside; the amount of graphene added is the total mass of the metal powder 0.3% of the total amount of nano-reinforced particles added is 1% of the total mass of the metal powder; the particle size of the aluminum alloy micro-particles is 10 μm-40 μm; the particle size of the nano-reinforced particles is 30nm-60nm.

[0075] In terms of mass percentage, the composition content of elements in the aluminum alloy micro-particles is: Zn: 4.7wt%, Mg: 1.5wt%, Cu: 2.0wt%, Cr: 0.15wt%, Fe: 0.18wt%, Mn : 0.03wt%, Yb: 0.6wt%, Si: ≤0.08wt%, Ti≤0.01wt%, and the balance is Al.

[0076] The nano-enhanced particles described in this example include ZrB 2 nanoparticles.

[0077] The metal powder for 3D printing high-strength aluminum alloy des...

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Abstract

The invention discloses a metal powder for 3D printing of a high-strength aluminum alloy, a printing method for 3D printing of the high-strength aluminum alloy with the metal powder and application ofthe 3D printing method. The metal powder for 3D printing of the high-strength aluminum alloy comprises aluminum alloy micro-particles. The metal powder is characterized in that the surface of the aluminum alloy micro-particles is modified with graphene and nano-reinforced particles from inside to outside; the addition amount of the graphene is 0.3-0.6% of the total mass of the metal powder, and the total addition amount of the nano-reinforced particles is 1-3% of the total mass of the metal powder; the particle size of the aluminum alloy micro-particles is 10[mu]m-60[mu]m; and the particle size of the nano-reinforced particles is 30nm-60nm. The metal powder can be used for printing the high-strength aluminum alloy and is widely applied in the manufacture of aluminum alloy parts.

Description

technical field [0001] The invention relates to a metal powder for 3D printing high-strength aluminum alloys, a printing method and an application thereof, belonging to the technical field of 3D printing. Background technique [0002] Aluminum alloy has high specific strength, specific modulus, good fracture toughness, fatigue resistance and corrosion resistance, and is an important material widely used in various industrial sectors. With the strong demand for lightweight and structural and functional integration, high-strength aluminum alloy parts are widely used in high-speed trains and other fields, but due to their poor welding performance and casting performance, traditional processing methods are difficult to prepare. Moreover, the traditional subtractive machining method has a serious waste of materials, and it is difficult to realize the forming of complex shapes, especially in the case of forming large metal components, which is costly, serious waste, and long manuf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B33Y70/00
CPCB33Y70/00B22F1/16
Inventor 朱忠尹苟国庆于金朋马前付正鸿张曦马传平郭糠李婷单美乐
Owner SOUTHWEST JIAOTONG UNIV
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