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3D printing 7xxx aluminum alloy and preparation method thereof

A 3D printing and aluminum alloy technology, which is applied in the direction of additive manufacturing, process efficiency improvement, additive processing, etc., can solve problems affecting the mechanical properties of 7xxx aluminum alloys, reduce the probability of crack formation, improve performance, and save production cost effect

Active Publication Date: 2018-07-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

7xxx aluminum alloy is a kind of aluminum alloy, which belongs to superhard aluminum alloy. It has good mechanical properties and processing properties, and can be used in aerospace, mechanical equipment and other fields. However, the existing methods for preparing 7xxx aluminum alloys produce Most of the 7xxx aluminum alloys have cracks, which seriously affect the mechanical properties of 7xxx aluminum alloys and limit the application of 7xxx aluminum alloys

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  • 3D printing 7xxx aluminum alloy and preparation method thereof
  • 3D printing 7xxx aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare 7xxx aluminum alloy powder, the weight percentage of each component is as follows: Si: 2.9%, Fe: 0.5%, Cu: 2.0%, Mn: 0.3%, Mg: 2.9%, Cr: 0.28%, Zn: 6.1%, Ti : 0.2%, Zr: 1.0%, Sc: 0.4%, the balance is Al.

[0030] Preparation method of the above aluminum alloy powder:

[0031] (1) The metal raw materials are proportioned according to the set ratio, and the 7xxx aluminum alloy powder is obtained by the gas atomization method after being fully and uniformly melted. The powder is dried and then sieved with a mesh of 250 meshes to obtain a powder with uniform particle size .

[0032] (2) Adjust the equipment, and pour 7xxx aluminum alloy powder into the powder feeding cylinder or the powder hopper, the cavity is sealed and vacuumed, and then the inert gas is passed through, and the red light scanning is used to simulate the laser scanning path to reduce the scanning range of the red light Control within the geometric range of the substrate.

[0033] (3) Laser processing an...

Embodiment 2

[0038] Prepare 7xxx aluminum alloy powder, the weight percentage of each component is as follows: Si: 2.8%, Fe: 0.5%, Cu: 2.0%, Mn: 0.3%, Mg: 2.9%, Cr: 0.28%, Zn: 6.1%, Ti : 0.2%, Zr: 0.9%, Sc: 0.6%, and the balance is Al.

[0039] Preparation method of the above aluminum alloy powder:

[0040] (1) The metal raw materials are proportioned according to the set ratio, and the aluminum alloy powder is obtained by the gas atomization method after being fully and uniformly melted. The powder is dried and then sieved with a mesh of 250 meshes to obtain a powder with uniform particle size.

[0041] (2) Adjust the equipment, and pour 7xxx aluminum alloy powder into the powder feeding cylinder or the powder hopper, the cavity is sealed and vacuumed, and then the inert gas is passed through, and the red light scanning is used to simulate the laser scanning path to reduce the scanning range of the red light Control within the geometric range of the substrate.

[0042] (3) Laser processing and f...

Embodiment 3

[0045] Prepare 7xxx aluminum alloy powder, the weight percentage of each component is as follows: Si: 2.7%, Fe: 0.5%, Cu: 2.0%, Mn: 0.3%, Mg: 2.9%, Cr: 0.28%, Zn: 6.1%, Ti : 0.2%, Zr: 0.8%, Sc: 0.8%, and the balance is Al.

[0046] Preparation method of the above aluminum alloy powder:

[0047] (1) The metal raw materials are proportioned according to the set ratio, and the aluminum alloy powder is obtained by the gas atomization method after fully and uniformly melted, and the powder is dried and then sieved to obtain the powder with the required particle size.

[0048] (2) Adjust the equipment, and pour 7xxx aluminum alloy powder into the powder feeding cylinder or the powder hopper, the cavity is sealed and vacuumed, and then the inert gas is passed through, and the red light scanning is used to simulate the laser scanning path to reduce the scanning range of the red light Control within the geometric range of the substrate.

[0049] (3) Laser processing and forming, that is, the ...

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Abstract

The invention discloses a 3D printing 7xxx aluminum alloy and a preparation method thereof. The 7xxx aluminum alloy comprises, by mass, 0.1-6.0% of Si, 0-6.0% of Fe, 1.2-6.0% of Cu, 0.1-6.3% of Mn, 2.1-6.9% of Mg, 0.18-0.68% of Cr, 5.1-10.1% of Zn, 0-6.2% of Ti, 0-6.0% of Zr, 0-1% of Sc, and the balance Al. An aluminum alloy workpiece subjected to 3D printing is smooth in surface and free of cracks. Moreover, 7075 aluminum alloy powder is low in price. By adopting the 3D printing workpiece prepared from the 7xxx aluminum alloy powder prepared through the preparation method, the production costcan be saved greatly.

Description

Technical field [0001] The invention belongs to the technical field of special materials for additive manufacturing (commonly known as 3D printing), and specifically relates to a 3D printing 7xxx aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy is an alloy based on aluminum metal with a certain amount of other alloying elements added. It has low density, high strength, good electrical and thermal conductivity, non-toxic, and easy recycling. It is widely used in shipbuilding, chemical industry, aerospace, and metal packaging. It is widely used in other fields. 7xxx aluminum alloy is a type of aluminum alloy and is a superhard aluminum alloy. It has good mechanical properties and processing properties and can be used in aerospace, mechanical equipment and other fields. However, the existing methods for preparing 7xxx aluminum alloy Most cracks exist in 7xxx aluminum alloys, which seriously affects the mechanical properties of 7xxx ...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/10B33Y70/00B22F3/105B33Y10/00
CPCC22C21/00C22C21/10B33Y10/00B33Y70/00B22F10/00B22F10/362B22F10/36B22F10/32B22F10/366B22F10/28B22F10/34Y02P10/25
Inventor 李瑞迪袁铁锤李澜波牛朋达
Owner CENT SOUTH UNIV
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