Al-Zn-Mg-SC series aluminum alloy powder for metal 3D printing and preparation method thereof

A 3D printing and aluminum alloy technology, applied in the direction of additive processing, etc., can solve the problems of unverified mechanical properties of printed parts, inability to know high-strength parts, small thermal conductivity, etc., to reduce insufficient metal dissolution and oxygen content Low, fast crystallization effect

Inactive Publication Date: 2020-07-24
HUNAN ORIENTAL SCANDIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material prepared by the method for preparing titanium and titanium alloy wire or powder for 3D printing has the characteristics of low density, small thermal conductivity, high specific strength, corrosion resistance, high temperature resistance, non-toxicity, and high non-magnetism. The patent document is disclosed The mechanical properties of the printed parts have not been verified, so it is impossible to know whether it can be applied to print high-strength parts in the aerospace field

Method used

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  • Al-Zn-Mg-SC series aluminum alloy powder for metal 3D printing and preparation method thereof
  • Al-Zn-Mg-SC series aluminum alloy powder for metal 3D printing and preparation method thereof
  • Al-Zn-Mg-SC series aluminum alloy powder for metal 3D printing and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0054] (1) Batching: batching according to the alloy ratio of 7% Zn, 2.75% Mg, 0.5% Mn, 0.15% Zr, 0.5% Cu, 0.3% Sc, 0.04% Ti, and the remainder is aluminum, which contains impurities Fe and Si , Fe≤0.2%, Si≤0.1%;

[0055] (2) Vacuum melting: using a vacuum melting furnace for melting, adding pure aluminum, aluminum copper alloy, aluminum scandium alloy, aluminum zirconium alloy, aluminum manganese alloy, magnesium ingot, aluminum titanium alloy, and aluminum zinc alloy in sequence. When the vacuum of the vacuum melting furnace reaches 3pa, the raw materials melt and the melting temperature is 750°C.

[0056] (3) Casting: After standing for 15 minutes, it is cast into a mold with a diameter of Ф120, and then taken out after cooling and forming. The mold is a water-cooled mold and is rapidly cooled for forming. The cooling rate is 100K / s and the casting temperature is 730°C.

[0057] (4) Homogenization treatment: Put the ingot into the annealing furnace for homogenization treatment, h...

Embodiment 2

[0068] (1) Batching: batching according to the alloy ratio of 7% Zn, 2.75% Mg, 0.5% Mn, 0.15% Zr, 0.5% Cu, 0.3% Sc, 0.04% Ti, and the remainder is aluminum, which contains impurities Fe and Si , Fe≤0.2%, Si≤0.1%;

[0069] (2) Vacuum melting: using a vacuum melting furnace for melting, adding pure aluminum, aluminum copper alloy, aluminum scandium alloy, aluminum zirconium alloy, aluminum manganese alloy, magnesium ingot, aluminum titanium alloy, and aluminum zinc alloy in sequence. When the vacuum of the vacuum melting furnace reaches 3pa, the raw materials melt and the melting temperature is 750°C.

[0070] (3) Casting: After standing for 15 minutes, it is cast into a mold with a diameter of Ф120, and then taken out after cooling and forming. The mold is a water-cooled mold and is rapidly cooled for forming. The cooling rate is 100K / s and the casting temperature is 730°C.

[0071] (4) Homogenization treatment: Put the ingot into the annealing furnace for homogenization treatment, h...

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Abstract

The invention discloses a preparation method of Al-Zn-Mg-SC series aluminum alloy powder for metal 3D printing. The preparation method comprises the steps of batching, vacuum melting, casting, homogenization treatment, ingot surface post-treatment and pulverizing. The invention also discloses the aluminum alloy powder prepared by the method. The aluminum alloy powder is used for 3D printing of a workpiece, and the tensile strength of the prepared workpiece is 500-550 MPa, the yield strength is 450-505 MPa, and the elongation is 9%-12%. The metal 3D printing aluminum alloy powder meeting high-strength part printing requirements is prepared, the chemical components are uniform, and the grain sizes basically range within 40-60 micrometers.

Description

Technical field [0001] The invention relates to the field of metal 3D printing powders, in particular to an Al-Zn-Mg-Sc series aluminum alloy powder for metal 3D printing and a preparation method thereof, and is suitable for printing aluminum alloy powders with high strength requirements in the aerospace field . Background technique [0002] Additive manufacturing, also known as "3D printing", is based on a computer three-dimensional design model, through software layered discrete and numerical control molding system, using laser beams, hot melt nozzles, etc. to combine metal powder, ceramic powder, plastic, cell tissue, etc. Special materials are stacked and bonded layer by layer, and finally superimposed to form a physical product. [0003] Aluminum alloy printing materials have been used in the development of weapon equipment products such as rocket engine nozzles, aircraft complex structural parts, and aero engine complex components, and they have begun to move from the resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053B22F9/08B22F9/10B33Y70/00
CPCC22C21/10C22C1/03C22C1/026C22F1/053B22F9/082B22F9/10B33Y70/00
Inventor 何江周文韬吴自进肖潇谭东政陈青松宋智谭浩王梦豪
Owner HUNAN ORIENTAL SCANDIUM
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