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Rare earth aluminum alloy wire for 3D printing and preparation method thereof

An aluminum alloy wire and 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of high operating environment requirements, low strength of printed products, low material utilization rate, etc., achieve simple process flow, ensure molding accuracy and appearance Effect, good fluidity effect

Active Publication Date: 2019-11-01
HUNAN ORIENTAL SCANDIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Additive manufacturing of metal materials can be divided into two process methods: powder feeding / powder spreading and wire feeding. Among them, metal powder-based additive manufacturing has high forming accuracy and is suitable for processing small components with complex shapes, but the material utilization rate is low, and the powder is harmful to the The environment is polluted to a certain extent, and there is a problem of high operating environment requirements; at present, the aluminum alloy printing materials at home and abroad are mainly powder materials, and the main components are AlSi 10 Mg and AlSi 12 Two kinds, there are printed products with low strength (σ b <350Mpa), small molding size, etc.

Method used

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  • Rare earth aluminum alloy wire for 3D printing and preparation method thereof
  • Rare earth aluminum alloy wire for 3D printing and preparation method thereof
  • Rare earth aluminum alloy wire for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of rare earth aluminum alloy wire for 3D printing is carried out according to the following steps:

[0054] (1) Raw material smelting: In a vacuum furnace, the smelting composition is Al-4%Mg-0.3%Mn-0.7%Er-0.3%Zr-0.05%Ti, controlling Fe-3 Pa. (Each percentage is mass percentage)

[0055] (2) The ingot in the step (1) is subjected to homogenization annealing at 480°C / 12h, the skin is cut and the head is removed.

[0056] (3) The ingot in the step (2) is continuously extruded at 500°C, and after rough drawing, intermediate drawing, annealing, and fine drawing, the wire is stripped to obtain a wire with a diameter of 1.2 mm, according to GB / T 228- 2010 standard for mechanical performance test, wire tensile strength σ b =356Mpa, yield strength σ 0.2 =325Mpa; the microscopic appearance of the wire is like figure 1 Shown.

[0057] (4) The wire material in the step (3) is printed with a laser fuse 3D printing device for sample printing, and processed into a test ...

Embodiment 2

[0059] (1) Raw material smelting: In a vacuum furnace, the smelting composition is Al-5%Mg-0.3%Mn-0.4%Sc-0.2%Zr, controlling Fe-3 Pa. (Each percentage is mass percentage)

[0060] (2) The ingot in the step (1) is subjected to homogenization annealing at 350° C. / 10 h, the skin is cut, and the head is removed.

[0061] (3) The ingot in the step (2) is continuously extruded at 500°C, and after rough drawing, intermediate drawing, annealing, and fine drawing, the wire is stripped to obtain a wire with a diameter of 1.2 mm, according to GB / T 228- 2010 standard for mechanical performance test, wire tensile strength σ b =347Mpa, yield strength σ 0.2 =312Mpa, 9% elongation.

[0062] (4) The wire material in the step (3) is printed with a laser fuse 3D printing device for sample printing, and processed into a test piece after heat treatment. According to GB / T 228-2010 standard for mechanical performance test, tensile strength σ b =457Mpa, yield strength σ 0.2 =415Mpa, elongation rate 10%.

Embodiment 3

[0064] (1) Raw material smelting: In a vacuum furnace, the smelting composition is Al-5%Mg-0.3%Mn-0.5%Sc-0.25%Zr control Fe-3 Pa.

[0065] (2) The ingot in the step (1) is subjected to homogenization annealing at 350° C. / 10 h, the skin is cut, and the head is removed.

[0066] (3) The ingot in the step (2) is continuously extruded at 500°C, and after rough drawing, intermediate drawing, annealing, and fine drawing, the wire is stripped to obtain a wire with a diameter of 1.2 mm, according to GB / T 228- 2010 standard for mechanical performance test, wire tensile strength σ b =414Mpa, yield strength σ 0.2 =382Mpa, elongation rate 12%.

[0067] (4) The wire material in the step (3) is printed with a laser fuse 3D printing device for sample printing, and processed into a test piece after heat treatment. According to GB / T 228-2010 standard for mechanical performance test, tensile strength σ b =492Mpa, yield strength σ 0.2 =458Mpa, elongation rate 11%.

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Abstract

The invention relates to a rare earth aluminum alloy wire for 3D printing and a preparation method thereof. The rare earth aluminum alloy wire comprises the following materials: 3-5wt% of Mg, 0.4-1.2wt% of RE, 0.1-1.0wt% of Zr, 0.1-1.0wt% of Mn, 0.05-0.25wt% of Ti, less than or equal to 0.05wt% of O, less than or equal to 0.02wt% of N, less than or equal to 0.01wt% of H and balance of A1 and unavoidable impurities, wherein the ratio of the Mn content to the RE content is 0.5-1:1, and the ratio of the Zr content to the RE content is 0.2-1:1. The wire provided by the invention adds rare earth and zirconium element on the basis of the composition of the aluminum-magnesium alloy to refine crystal grains, and simultaneously produces Al3 (REZr) precipitation strengthening, which is used for smooth feeding on the 3D printer, is not easy to break, has high strength, and ensures the printing precision of a product; and the printed parts have high density, good mechanical properties and corrosion resistance.

Description

Technical field [0001] The invention relates to a rare earth aluminum alloy wire used for 3D printing and a preparation method thereof, and belongs to the field of material preparation. Background technique [0002] 3D printing is an advanced digital manufacturing technology, which manufactures three-dimensional solid parts by layer-by-layer stacking. As a research hotspot of 3D printing, laser 3D printing technology has the advantages of high material utilization rate, high processing flexibility, short processing cycle and no restriction on the geometric shape of parts. It is especially suitable for manufacturing small batches and complex shapes. Medical, automobile, shipbuilding, nuclear power and other fields have broad application prospects. [0003] Metallic material additive manufacturing can be divided into powder feeding / powdering and wire feeding. The additive manufacturing based on metal powder has high forming accuracy and is suitable for processing small components wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C1/03C22F1/047B33Y70/00
CPCB33Y70/00C22C1/026C22C1/03C22C21/06C22F1/047
Inventor 闫建平李雄飞徐定能陈青松陈卫平
Owner HUNAN ORIENTAL SCANDIUM
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