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Gas atomization preparation method of metal power with low satellite ball rate and for 3D printing

A 3D printing and metal powder technology, which is applied in the fields of additive manufacturing and powder metallurgy, can solve problems such as industrial production problems, and achieve the effects of good fluidity, low composition and high sphericity

Inactive Publication Date: 2019-03-19
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to improve the problem of satellites in the process of preparing metal powders by gas atomization technology, this invention is proposed to solve the problems of industrial production of metal powders with high sphericity and low satellite spheroidity at the present stage, and promote the development of 3D printing technology in China

Method used

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  • Gas atomization preparation method of metal power with low satellite ball rate and for 3D printing
  • Gas atomization preparation method of metal power with low satellite ball rate and for 3D printing
  • Gas atomization preparation method of metal power with low satellite ball rate and for 3D printing

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Embodiment

[0029] A gas atomization preparation method of low-satellite metal powder for 3D printing. In the ultrasonic close-coupled vacuum air atomization process, an annular inflator is installed at the upper end of the atomization chamber, and an external airflow is introduced to improve the trajectory of the return gas in the atomization chamber. Reduce the probability of solidified particles re-entering the area and colliding with high-temperature particles during the aerosolization process, and realize the preparation of spherical metal powders with low satellites and high fluidity for 3D printing.

[0030] refer to figure 1 , using an ultrasonic close-coupled gas atomization device to carry out the ultrasonic close-coupled vacuum air atomization process, the ultrasonic close-coupled gas atomization device includes an atomization chamber 5, a melting chamber 1 is arranged above the atomization chamber 5, and a melting crucible is arranged in the melting chamber 1 2. The outlet of ...

Embodiment 2

[0034] The method of the invention prepares the Inconel 718 high-temperature alloy powder with low satellite sphere, high sphericity and good fluidity. The alloy is smelted under protective gas at a melting temperature of 1500°C. High-purity argon is used for atomization, and the atomization pressure is 4MPa. At the same time as the atomization, start the ring gas filling device, the filling gas is high-purity argon, and the filling pressure is 1MPa. The diameter of the annular inflatable device is 1.4m, and the divergence angle is 50 degrees. After the atomized powder is collected by the cyclone separation system, the metal powder with a particle size of 15-106 μm is screened out through the screening device, and the yield reaches 75%. Observation by scanning electron microscope shows that the prepared powder has high sphericity and few satellites. The fluidity was measured by a Hall flow meter to reach 11s.

[0035] The prepared Inconel 718 superalloy powder scanning elect...

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Abstract

The invention relates to a gas atomization preparation method of metal power with a low satellite ball rate and for 3D printing. The preparation method is characterized in that in a process of ultrasonic tight coupling vacuum gas atomization, an annular gas filling device is arranged at the upper end of an atomization chamber, an external airflow is introduced to improve a movement track of returngas in the atomization chamber, a probability of a condensed particle reentering an area to collide and bond with a high temperature particle in the gas atomization process is reduced so as to realize the preparation of the spherical metal powder for 3D printing with a low satellite ball rate and high mobility. Compared with the prior art, the preparation method innovatively introduces the external airflow to improve the movement track of the return gas in the atomization chamber, realizes the production of the metal powder with the low satellite ball rate and high mobility through the annular gas filling device on the basis of a traditional tight coupling atomization powder manufacturing technology, and can meet various demands of the industrial production for the high-quality sphericalmetal powder.

Description

technical field [0001] The invention belongs to the technical fields of additive manufacturing and powder metallurgy, and in particular relates to a gas atomization preparation method of low-satellite metal powder for 3D printing. Background technique [0002] Metal 3D printing technology uses the additive manufacturing idea of ​​rapid prototyping technology "discrete + accumulation", uses laser or electron beam as a high-energy focused heat source, melts metal powder in a layered form and accumulates it layer by layer to form three-dimensional parts. [0003] With the development of metal 3D printing technology, the quality of metal powder consumables plays a vital role in the development of the entire system. As a forming raw material, the characteristics of metal powder will directly affect whether the 3D printing forming process can be carried out stably and efficiently, and have a decisive impact on the shape, dimensional accuracy, structure and mechanical properties of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/088B22F2009/0888
Inventor 张亮朱德祥吴文恒卢林杨启云王涛倪晓晴
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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