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A metal hydrotalcite composite material for 3D printing and its preparation method and application method

A 3D printing and composite material technology, applied in the direction of additive processing, etc., can solve the problems that the smooth transportation of metal powder is no longer obvious, it is difficult to obtain dense metal products, and the transportation uniformity is reduced, and achieves good sintering stability and good powder. The effect of reducing transportability and loss on ignition

Active Publication Date: 2017-05-31
上海中氦信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to the above, indirect 3D printing can effectively solve the problem of forming metal powder, but the accuracy of metal powder through indirect 3D printing is affected by the metal powder transport and adhesive ablation, so it is difficult to obtain metal with dense structure and fine appearance. products
Although the particle shape of the 3D printing metal powder is currently spheroidized to improve the transportability of 3D printing, as the particle size decreases, the smooth transport of the metal powder is no longer obvious, especially when the particle size of the metal powder is less than 10. When it is micron, due to the agglomeration of metal powder, the Hall flow rate increases and the uniformity of delivery decreases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Prepare 80 parts by weight of metal powder stainless steel powder with a particle size of less than 100 nanometers and colloidal bletilla striata glue in a stirred tank to make a dispersion liquid, so that the metal powder is completely dispersed and suspended in the colloidal liquid, and the metal powder is completely uniformly suspended. In the state, dilute the colloidal liquid with water to ensure good fluidity of the dispersion;

[0027] 2) Add 10 parts by weight of hydrotalcite that has been heated, decomposed and calcined in the range of 450-500°C to the metal dispersion prepared in step 1), set the vacuum pressure of the stirring tank to 0.2MPa, and stir at a speed of 5000rpm for 30min. The dispersion enters the interlayer of hydrotalcite;

[0028] 3) Filter and dry the material obtained in step 2) to remove volatile matter, and further heat and fire at 450-500°C for 25 minutes to completely volatilize the water between the hydrotalcite layers, carbonize a sm...

Embodiment 2

[0031] 1) Prepare 85 parts by weight of metal aluminum powder with a particle size of less than 100 nanometers and colloidal liquid guar gum in a stirred tank to make a dispersion liquid, so that the metal powder is completely dispersed and suspended in the colloidal liquid, and the metal powder is completely uniformly suspended. Dilute the colloidal liquid with water to ensure good fluidity of the dispersion;

[0032] 2) Add 10 parts by weight of hydrotalcite that has been decomposed and calcined in the range of 450-500°C to the metal dispersion prepared in step 1), set the vacuum pressure of the stirring tank to 0.5MPa, and stir at a speed of 8000rpm for 30min. The dispersion enters the interlayer of hydrotalcite;

[0033] 3) Filter and dry the material obtained in step 2) to remove volatile matter, and further heat and fire at 450-500°C for 10 minutes to completely volatilize the water between the hydrotalcite layers, carbonize a small amount of colloidal material, and age ...

Embodiment 3

[0036] 1) Prepare 82 parts by weight of metal nickel powder with a particle size of less than 100 nanometers and colloidal squash glue in a stirred tank to make a dispersion liquid, so that the metal powder is completely dispersed and suspended in the colloidal liquid, and the metal powder is completely uniformly suspended. In the state, dilute the colloidal liquid with water to ensure good fluidity of the dispersion;

[0037] 2) Add 13 parts by weight of hydrotalcite that has been heated, decomposed and calcined in the range of 450-500°C to the metal dispersion prepared in step 1), set the vacuum pressure of the stirring tank to 0.4MPa, and stir at a speed of 10000rpm for 45min. The dispersion enters the interlayer of hydrotalcite;

[0038] 3) Filter and dry the material obtained in step 2) to remove volatile matter, and further heat and fire at 450-500°C for 15 minutes to completely volatilize the water between the hydrotalcite layers and carbonize a small amount of colloida...

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Abstract

Metal hydrotalcite composite materials used for 3D printing are characterized in that the metal hydrotalcite composite materials used for 3D printing are formed by embedding metal powder between hydrotalcite layers of a layered structure. By embedding the metal powder in the layered structure of hydrotalcite, good powder conveying performance is realized. Due to the characteristic that the hydrotalcite forms spinel (MgAl2O4) and magnesium oxide (MgO) at the temperature of 600 DEG C, support of the metal powder is obtained, the ignition loss of adhesives is reduced, it is guaranteed that metal products do not deform during sintering, and the defect of low accuracy of 3D printing of metal products is overcome.

Description

technical field [0001] The invention belongs to the field of 3D printing manufacturing, and in particular relates to a metal composite material for 3D printing. Background technique [0002] The emergence of 3D printing manufacturing technology has completely changed the traditional manufacturing process. Its advantages are that it can quickly correct design errors, improve production efficiency, and reduce development costs. Compared with traditional mold development, as well as complex processes such as forging and casting, the intermediate links are simplified, thereby reducing the consumption of manpower and material resources and shortening the development cycle. Compared with the current development cycle of more than 45 days for domestic parts, 3D printing technology only needs a development cycle of 1 to 7 days depending on the complexity of the parts, and has outstanding advantages in the manufacture of complex parts. At present, the most critical issue is the stab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B33Y70/00
Inventor 陈庆曾军堂
Owner 上海中氦信息科技有限公司
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