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Double-flow plasma atomized metal powder device and method

An atomized metal and plasma technology, applied in the direction of additive processing, etc., can solve the problems of reducing the quality of powder process performance, product quality, powder clogging of printing equipment, affecting the uniform distribution of powder layer, etc.

Pending Publication Date: 2021-09-10
江苏智仁景行新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PA and EIGA methods are currently the two most common methods for producing spherical titanium alloy powders. However, these two methods still have the problem of high satellite powder content.
[0003] Too much satellite powder will reduce the process performance of the powder and the quality of the final product. For example, powders with poor fluidity in 3D printing are more likely to link, causing "bridges", or powder clogging in the printing equipment, affecting the uniformity of the powder layer distributed

Method used

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  • Double-flow plasma atomized metal powder device and method
  • Double-flow plasma atomized metal powder device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 Ti-6Al-4V alloy atomization

[0041] The 23-grade Ti-6Al-4V titanium alloy wire with a diameter of 3mm is used as the raw material, and the size of a single vent on the inner wall of the top wall of the ion atomization reaction chamber is 8mm wide and 1200mm long, distributed evenly along the circumference, a total of 36.

[0042] In the atomization preparation stage, the whole device is pre-evacuated to 10 -3 ~10Pa, then filled with argon to establish a protective atmosphere, after filling the protective atmosphere, the internal pressure of the device is not higher than 110KPa.

[0043]At the beginning of atomization, the bar is fixed on the feeding mechanism, and the wire feeding mechanism drives the wire to pass through the straightening machine at a certain speed and enter the induction heating coil. With a power of 6.5KW, the wire is preheated to a temperature close to the melting point of the alloy. , and then sent into the plasma atomization area.

[...

Embodiment 2

[0047] Example 2 Zr702 atomization

[0048] Zr702 wire with a diameter of 2mm is used as the raw material, and the size of a single air vent on the inner wall of the top wall of the ion atomization reaction chamber is 8mm wide and 1200mm long, distributed evenly along the circumference, a total of 36.

[0049] In the atomization preparation stage, the whole device is pre-evacuated to 10 -3 ~10Pa, then filled with argon to establish a protective atmosphere, after filling the protective atmosphere, the internal pressure of the device is not higher than 110KPa.

[0050] At the beginning of atomization, the bar is fixed on the feeding mechanism, and the wire feeding mechanism drives the wire to pass through the straightening machine at a certain speed and enter the induction heating coil. With a power of 5.5KW, the wire is preheated to a temperature close to the melting point of the alloy. , and then sent into the plasma atomization area.

[0051] Three symmetrically distributed...

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PUM

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Abstract

The invention discloses a double-flow plasma atomized metal powder device and a method. According to the double-flow plasma atomized metal powder device and the method, on the basis of supersonic atomization airflow, background sheath airflow is added in an atomization chamber, guiding is carried out on atomized metal molten drops in flight, it is ensured that the molten drops are properly conveyed, mutual collision and bonding among the molten drops are reduced, and therefore, the purpose of reducing satellite powder in the plasma atomized metal powder is achieved.

Description

technical field [0001] The invention belongs to the technical field of spherical metal powder material preparation. In particular, it relates to a dual-flow plasma atomization metal powder device and method. Background technique [0002] Fine spherical metal powders are important raw materials for technologies such as additive manufacturing (3D printing), metal injection molding, hot isostatic pressing, and coating. These fine powders can be used in aerospace, biomedical, and industrial applications. At present, the production of active metal powder (such as titanium, titanium alloy, titanium aluminum alloy, zirconium, zirconium alloy, etc.) has plasma atomization gas atomization method (PA), electrode induction gas atomization method (EIGA) and plasma rotating electrode method (PREP )Wait. Compared with gas atomization and plasma atomization, the powder prepared by PREP has less hollow powder and satellite powder. The main problem is that the yield of fine powder is very ...

Claims

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Application Information

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IPC IPC(8): B22F9/08B33Y70/00B33Y40/10
CPCB22F9/082B33Y70/00B33Y40/10B22F2009/0848
Inventor 王贵宗郜俊震
Owner 江苏智仁景行新材料研究院有限公司