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Laser additive manufacturing technology of 6061 aluminum alloy

A technology of additive manufacturing and aluminum alloy, which is applied in the field of additive manufacturing process of 6061 aluminum alloy to achieve the effect of enhancing strength

Inactive Publication Date: 2018-09-07
长沙大衡智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional processing technology is difficult to realize the manufacture of complex components such as variable cross-section, internal complex flow channels, and precision thin-walled parts, but these are easy to achieve for additive manufacturing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Spread the 6061 aluminum alloy raw material powder to form a powder layer, and the thickness of the powder is 50 μm;

[0019] (2) Under the protection of argon, laser scan the powder layer for additive manufacturing; wherein, the laser power is 500W, the spot diameter during the laser scanning process is preferably 100 μm, and the laser scanning speed is preferably 9000mm / s. The scanning interval of scanning is preferably 0.1mm;

[0020] (3) Cooling with argon gas at minus 30 degrees Celsius;

[0021] (4) Stress relief annealing treatment: heating to 140°C and then air cooling;

[0022] (5) Steps (1)-(4) were repeated 10 times to obtain 6061 aluminum alloy samples.

[0023] The tensile test was carried out on the prepared 6061 aluminum alloy, the tensile strength was 523Mpa, and the elongation was 11%.

Embodiment 2

[0025] (1) Spread the 6061 aluminum alloy raw material powder to form a powder layer, and the thickness of the powder spreading is preferably 30 μm;

[0026] (2) Under the protection of argon, laser scan the powder layer for additive manufacturing; where the laser power is 800W, the spot diameter during the laser scanning process is preferably 50 μm, and the laser scanning speed is preferably 10000 mm / s. The scanning spacing of scanning is preferably 0.17mm;

[0027] (3) It is cooled by argon gas at minus 50 degrees Celsius;

[0028] (4) Stress relief annealing treatment: heating to 220°C and then air cooling;

[0029] (5) Steps (1)-(4) were repeated 10 times to obtain 6061 aluminum alloy samples.

[0030] Tensile test was carried out on the prepared 6061 aluminum alloy, the tensile strength was 511Mpa, and the elongation was 10%.

Embodiment 3

[0032] (1) Spread the 6061 aluminum alloy raw material powder to form a powder layer, and the thickness of the powder is 39 μm;

[0033] (2) Under the protection of argon, laser scan the powder layer for additive manufacturing; where the laser power is 650W, the diameter of the spot during laser scanning is preferably 70 μm, and the speed of laser scanning is preferably 8000mm / s. The scanning spacing of scanning is preferably 0.2mm;

[0034] (3) It is cooled by argon gas at minus 40 degrees Celsius;

[0035] (4) Stress relief annealing treatment: heating to 170°C and then air cooling;

[0036] (5) Steps (1)-(4) were repeated 10 times to obtain 6061 aluminum alloy samples.

[0037] The tensile test was carried out on the prepared 6061 aluminum alloy, the tensile strength was 541Mpa, and the elongation was 10%.

[0038] Comparison: the tensile strength of 6061 aluminum alloy obtained by conventional forging and annealing is 310Mpa, and the elongation is 11%. It can be seen th...

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Abstract

The invention discloses a laser additive manufacturing technology of a 6061 aluminum alloy. Plasticity is not reduced while the strength of the 6061 aluminum alloy is greatly improved. 6061 aluminum alloy powder is molten and solidified through lasers, and then, low-temperature inert gas treatment is instantly conducted to generate a large number of dislocation defects, so that the strength is improved.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing process of 6061 aluminum alloy. Background technique [0002] 6061 aluminum alloy has excellent properties such as low density, high specific strength, thermal conductivity, and corrosion resistance. It is a lightweight structural material commonly used in the aerospace field. However, traditional processing technology is difficult to realize the manufacture of complex components such as variable cross-section, internal complex flow channels, and precision thin-walled parts, but these are easy to achieve with additive manufacturing technology. Contents of the invention [0003] Purpose of the invention: The purpose of the present invention is to provide a laser additive manufacturing process for high-strength 6061 aluminum alloys. The process provided by the present invention can obtain 6061 aluminum alloys with excellent quality. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/24B33Y10/00
CPCB22F3/24B33Y10/00B22F2998/10B22F2003/248B22F10/00B22F10/36B22F10/366B22F10/50Y02P10/25
Inventor 不公告发明人
Owner 长沙大衡智能科技有限公司
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