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Metal beryllium powder for 3D printing and preparation method and application thereof

A 3D printing, metal beryllium technology, applied in the field of metal beryllium powder preparation, can solve the problems of unreasonable particle size distribution, limited application of metal beryllium, low bulk density, etc., and achieves good fluidity, low oxygen content, and good sphericity. Effect

Active Publication Date: 2020-08-14
西藏智材新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing metal beryllium powders on the market are mainly produced by mechanical crushing, gas atomization and reduction. They are irregular polygonal and sponge-shaped, with unreasonable particle size distribution, poor fluidity and low bulk density, which cannot meet the requirements of 3D printing. Requirements limit the application of metal beryllium in the field of 3D printing, and there is an urgent need to develop a metal beryllium powder suitable for 3D printing

Method used

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  • Metal beryllium powder for 3D printing and preparation method and application thereof
  • Metal beryllium powder for 3D printing and preparation method and application thereof
  • Metal beryllium powder for 3D printing and preparation method and application thereof

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preparation example Construction

[0027] In an exemplary embodiment of the present invention, the preparation method of metal beryllium powder for 3D printing may comprise the following steps:

[0028] Put the metal beryllium rod into the plasma arc melting rotary atomization device, draw a vacuum and control the vacuum degree in the device (that is, the vacuum degree in the vacuum chamber) at 5×10 -3 Below Pa, further, it can be 3×10 -3 Pa~5×10 -3 Pa. Excessively high vacuum in the extraction device will prolong the production preparation time of the equipment and reduce work efficiency. If the vacuum in the extraction device is too low, more inert gas needs to be flushed to replace and remove oxygen, which is uneconomical.

[0029] Then a mixed inert gas is fed into the device to ensure that the oxygen content in the atomization chamber (ie vacuum chamber) is below 3ppm, and the plasma arc is turned on under the protection of the inert gas to melt the front end of the metal beryllium rod to form a liquid f...

example 1

[0054] Process metal beryllium rods containing 98.2% beryllium and 97% relative density (see Table 1 for the main components) into Ф50×700mm raw beryllium rods, and remove oxides and impurities on the surface of the raw material beryllium rods.

[0055] Put the raw material beryllium rods from which surface oxides and impurities have been removed into the arc rotating electrode device, and vacuumize to 3×10 -3 Pa.

[0056] Then feed a mixed inert gas into the device. When the oxygen content in the atomization chamber is guaranteed to be lower than 3ppm, the arc is turned on under the protection of the inert gas, and the power of the arc melting is controlled by adjusting the working current to control the melting of the metal beryllium rod. Speed, among them, the working current output is 1800A, and the arc length is 70mm.

[0057] The raw material beryllium rod is rotated at a speed of 16000rpm. The front end of the raw material beryllium rod is melted by the arc to form a l...

example 2

[0066] Take metal beryllium rods with a beryllium content greater than 99.1% and a relative density greater than 97% (see Table 3), process them into raw material beryllium rods with a diameter of Ф100×350mm, and remove oxides and impurities on the surface of the raw material beryllium rods.

[0067] Put the raw material beryllium rods from which surface oxides and impurities have been removed into the arc rotating electrode device, and vacuumize to 3×10 -3 Pa.

[0068] Then feed a mixed inert gas into the device to ensure that the oxygen content in the atomization chamber is lower than 3ppm, and open the arc under the protection of the inert gas, and control the melting speed and operating current of the metal beryllium rod by controlling the power of the arc melting and the size of the working current Output 2800A, arc length 45mm.

[0069] The raw material beryllium rod is rotated at a speed of 26000rpm. The end surface of the raw material beryllium rod is melted into a li...

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Abstract

The invention provides metal beryllium powder with high production efficiency for 3D printing and a preparation method and application thereof. The preparation method can comprise the following stepsthat a metal beryllium rod is placed in a vacuum environment; inert gas is introduced into the vacuum environment, wherein the oxygen content in the vacuum environment is not more than 3 ppm; the endface of the metal beryllium rod is melted into a liquid film through electric arcs; the metal beryllium rod is rotated to crush the liquid film into fine particles; and the fine particles are cooled to obtain the metal beryllium powder. The metal beryllium powder can comprise a metal beryllium powder body prepared through adopting the above preparation method. The application can comprise application in the field of laser or electron beam additive manufacturing. The metal beryllium powder has the beneficial effects that the preparation efficiency of the metal beryllium powder is high, and theenergy consumption is low; the prepared metal beryllium powder is good in sphericity, low in oxygen content and good in fluidity, and is a good raw material for 3D printing; and equipment used in theprocess of preparing the spherical metal beryllium powder through is more stable and more reliable, and the production efficiency of the equipment is higher than the production efficiency of other spherical powder preparation equipment.

Description

technical field [0001] The invention relates to the technical field of preparation of metal beryllium powder, in particular to a metal beryllium powder suitable for 3D printing and its preparation method and application. Background technique [0002] Additive Manufacturing (AM) is also known as 3D printing. The metal powder used in 3D printing is the most important link in the 3D printing industry chain of metal parts, and also the greatest value. In addition to having accurate chemical composition and low oxygen content, the metal powder used for 3D printing must also meet the physical characteristics required by 3D printing technology for metal powder: fine powder particle size, narrow particle distribution range, and high sphericity of powder particles , good fluidity, high bulk density, high tap density, less inclusions and other special requirements indicators. The powder particle size generally required by the domestic laser cladding deposition technology is: 53-250 μ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/14B22F1/00B33Y70/00
CPCB22F9/14B33Y70/00B22F1/065
Inventor 何安西
Owner 西藏智材新材料有限公司
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