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Aluminum alloy 3D printing heat treatment method

A heat treatment method and 3D printing technology, applied in the field of metal materials, can solve problems such as large internal stress of aluminum alloys, achieve the effects of improving density and strength, eliminating residual stress, and increasing yield strength and elongation

Active Publication Date: 2020-11-13
飞而康快速制造科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the object of the present invention is to provide a heat treatment method for 3D printing aluminum alloy, the method sequentially adopts the combined heat treatment process of hot isostatic pressing, solid solution and aging, and the 3D printed aluminum alloy sample Heat treatment is carried out to solve the problem of large internal stress of the aluminum alloy prepared by 3D printing method. It can not only eliminate the internal residual stress, improve the strength, but also improve the yield strength and elongation of the material, so that its comprehensive mechanical properties are excellent, so that it can expand Its scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This embodiment provides a heat treatment method for 3D printing aluminum alloy, the method comprising the following steps:

[0059] (1) Place the 3D printed aluminum alloy sample in the hot isostatic pressing forming chamber for hot isostatic pressing treatment, the temperature of the hot isostatic pressing treatment is 500°C, the heating rate is 5°C / min, and the pressure is 100MPa, Keep warm for 3 hours, then cool with the furnace, the cooling rate with the furnace is 10°C / min;

[0060] Wherein, the method for 3D printing and forming of the aluminum alloy sample is:

[0061] Dry the AlSi7Mg powder and place it in the powder supply bin of the 3D printing equipment, adjust the preheating temperature of the substrate to 100°C, spread the powder evenly on the processing platform with a scraper, the thickness of the powder is 30 μm, scan and irradiate with a laser, The power of the laser is 300W, the laser scanning speed is 1000mm / s, and the spot diameter during laser sca...

Embodiment 2

[0066] This embodiment provides a heat treatment method for 3D printing aluminum alloy, the method comprising the following steps:

[0067] (1) Place the 3D printed aluminum alloy sample in the hot isostatic pressing forming chamber for hot isostatic pressing treatment, the temperature of the hot isostatic pressing treatment is 520°C, the heating rate is 6°C / min, and the pressure is 130MPa, Keep warm for 2 hours, then cool with the furnace at a rate of 12°C / min;

[0068] Wherein, the method for 3D printing and forming of the aluminum alloy sample is:

[0069] Dry the AlSi10Mg powder and put it in the powder supply bin of the 3D printing equipment, adjust the preheating temperature of the substrate to 130°C, spread the powder evenly on the processing platform with a scraper, the thickness of the powder is 40 μm, and scan and irradiate with a laser. The power of the laser is 400W, the laser scanning speed is 1500mm / s, and the spot diameter during laser scanning is 100μm. After ...

Embodiment 3

[0074] This embodiment provides a heat treatment method for 3D printing aluminum alloy, the method comprising the following steps:

[0075] (1) Place the 3D printed aluminum alloy sample in the hot isostatic pressing forming chamber for hot isostatic pressing treatment, the temperature of the hot isostatic pressing treatment is 540°C, the heating rate is 3°C / min, and the pressure is 150MPa, Keep warm for 4 hours, then cool with the furnace, the cooling rate with the furnace is 8°C / min;

[0076] Wherein, the method for 3D printing and forming of the aluminum alloy sample is:

[0077] Dry the AlSi10Mg powder and place it in the powder supply bin of the 3D printing equipment. Adjust the preheating temperature of the substrate to 150°C. Use a scraper to evenly spread the powder on the processing platform with a thickness of 60 μm. Scan and irradiate with a laser. The power of the laser is 550W, the laser scanning speed is 1700mm / s, and the spot diameter during laser scanning is 1...

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Abstract

The invention provides an aluminum alloy 3D printing heat treatment method. The method includes the following steps that an aluminum alloy 3D printing sample is subjected to hot isostatic pressing treatment, and then furnace cooling is conducted; the treated sample is subjected to solution treatment and then water cooling is performed; and afterwards, the sample is subjected to aging treatment, and heat-treated 3D printing aluminum alloy is obtained after air cooling. According to the aluminum alloy 3D printing heat treatment method provided in the invention, the combined heat treatment technology of hot isostatic pressing, solid solution and aging is adopted to be assisted with a proper cooling mode to improve the density and strength of a 3D printing aluminum alloy material, the inner residual stress of the material can be removed particularly, the plastic properties like yield strength and ductility are improved, the comprehensive mechanical properties of the aluminum alloy materialare also improved, and the applied field of 3D printing metal materials is widened; and the combined heat treatment technology is selected according to the defects of the 3D printing metal materials, and the reference function on improvement of the properties of various types of metal materials can be achieved.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to a heat treatment method for 3D printing aluminum alloy. Background technique [0002] Metal 3D printing technology has the advantages of high dimensional accuracy, good surface quality, and excellent performance of formed parts. In particular, it can realize the integrated forming of dozens or even hundreds of traditional parts, and can complete the precise forming of highly complex and thin-walled parts. Countries give priority to promotion and are widely used in many fields. As one of the important materials for metal 3D printing, aluminum alloy has been widely used in military industry, aerospace, automobile manufacturing and other fields due to its excellent characteristics such as light density, good elasticity, high specific stiffness and specific strength, and has a good performance. development prospects. [0003] Although the mechanical properties of aluminum all...

Claims

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Application Information

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IPC IPC(8): B22F3/24C22F1/043B22F3/105B33Y10/00
CPCB22F3/24C22F1/043B33Y10/00B22F2003/248
Inventor 陈志茹
Owner 飞而康快速制造科技有限责任公司
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