Vacuum atomizing device and method for preparing 3D printing powder

An atomization device and vacuum technology, applied in the field of 3D printing, can solve the problem of difficulty in controlling the surface smoothness of powder particles, and achieve the effects of reducing the solidification speed, recycling resources, and increasing spherical similarity.

Active Publication Date: 2018-09-28
福州臻美网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the field of 3D printing metal powder making, the method of gas atomization powder making is mainly used to prepare 3D printing powder. The factors that determine the quality of metal powder are nozzle pressure, shape, setting distance and metal material. 3D printing powder with high surface quality It is beneficial to improve the quality of powder products, in which the particle size and sphericity of the metal powder can be significantly changed by changing the nozzle parameters, but it is difficult to control the surface smoothness of the powder particles

Method used

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  • Vacuum atomizing device and method for preparing 3D printing powder
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  • Vacuum atomizing device and method for preparing 3D printing powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 As shown, this embodiment provides a vacuum atomization device, which includes a vacuum induction furnace 1, a tundish 2, a gas atomization device 3, a cooling and dissolving tank 4, and a powder collection system 5 connected in sequence. The vacuum atomization device Also includes a high-pressure gas supply system 6, the gas atomization device 3 includes a metal liquid nozzle 31 communicated with the tundish 2 and a gas nozzle 32 communicated with the high-pressure gas supply system 6, the vacuum atomization device also Including a salt bath 7, the salt bath 7 is arranged above the gas atomization device 3, the salt bath 7 includes a salt bath nozzle 71, and the opposite sides of the molten metal nozzle 31 are respectively provided with a Said salt bath nozzle 71, said gas nozzle 32 is respectively arranged on opposite sides of said metal liquid nozzle 31, said salt bath nozzle 71 is arranged between said gas nozzle 32 and said metal liquid nozzle 31;

...

Embodiment 2

[0036] In this implementation, the method of using tool steel to prepare 3D printing powder is tested:

[0037] Step 1: The tool steel raw material with the composition shown in Table 1 is removed by pickling or grinding to remove the surface oxide rust layer, and cut into small sections of 30-50 cm, and put into the vacuum in the vacuum device in Example 1. Smelt in the induction furnace 1, vacuumize, the vacuum degree is 100pa, set the power to 20kw, heat to ensure that the raw materials are completely melted, and open the sodium nitrate salt bath 7 at the same time to keep the temperature constant at 350°C;

[0038] Table 1 Chemical Composition of Raw Materials

[0039] C

Ti

mn

P

S

co

Mo

Ni

N

0.02

0.6

≤0.10

≤0.01

≤0.01

8.5

4.6

18.0

70ppm

[0040] Step 2: feed nitrogen into the gas atomization device 3, open the gas nozzle 32 of the high-pressure gas supply system 6, the pressure of the nozzle is 5MPa,...

Embodiment 3

[0046] In this implementation, the method of preparing 3D printing powder using rod-shaped Fe-Mn-Pt-based medical metal materials is tested:

[0047] Step 1: For tool steel raw materials with the composition shown in Table 1, use pickling or grinding to remove the oxide rust layer on the surface, cut into small sections of 30-50 cm, and put them into the vacuum induction furnace 1 in the vacuum device for melting , vacuum, the vacuum degree is 100pa, set the power to 20kw, heat to ensure that the raw materials are completely melted, and open the sodium nitrate salt bath 7 at the same time to keep the temperature constant at 350°C;

[0048] Table 2 Chemical Composition of Raw Materials

[0049] C

Al

mn

Pt

S

N

0.6

0.5

18

1

≤0.01

70ppm

[0050] Step 2: Pass nitrogen into the gas atomization device 3, open the gas nozzle 32 of the high-pressure gas supply system 6, the pressure of the nozzle is 5.5MPa, spray through the nozzle, ...

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Abstract

The invention discloses a vacuum atomizing device. The vacuum atomizing device comprises a vacuum induction furnace, a tundish, a gas atomizing device, an atomizing cooling tower and a powder collecting system which are sequentially connected. The vacuum atomizing device further comprises a high-pressure gas supplying system; the gas atomizing device comprises a hot metal spraying head which communicates with the tundish, and a gas spraying head which communicates with the high-pressure gas supplying system. The vacuum atomizing device further comprises a salt bath device which is arranged above the gas atomizing device; the salt bath device comprises a salt bath spraying head which communicates with the salt bath device; and the salt bath spraying head is arranged between the hot metal spraying head and the gas spraying head. According to the device, the salt bath spraying head is additionally arranged between the hot metal spraying head and the gas spraying head, so that the powder surface can be subjected to thermal treatment through salt bath when the hot metal solidifies, and as a result, the powder surface solidification speed is decreased, the sphere similarity of the powderparticle surfaces can be improved, and the powder surface quality is improved.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a vacuum atomization device and a method for preparing 3D printing powder. Background technique [0002] In the field of 3D printing metal powder making, the method of gas atomization powder making is mainly used to prepare 3D printing powder. The factors that determine the quality of metal powder are nozzle pressure, shape, setting distance and metal material. 3D printing powder with high surface quality It is beneficial to improve the quality of powder products, in which the particle size and sphericity of the metal powder can be significantly changed by changing the nozzle parameters, but it is difficult to control the surface smoothness of the powder particles. Contents of the invention [0003] In view of this, the present invention provides a vacuum atomization device capable of improving the surface quality of 3D printing powder and a method for preparing 3D printing powder. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/086
Inventor 黄永旺
Owner 福州臻美网络科技有限公司
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