A device and method for producing metal alloy spherical powder for 3D printing

A metal alloy and spherical powder technology, applied in the field of 3D printing, can solve problems such as poor sphericity, high powder impurity content, and insufficient thoroughness, and achieve the effect of avoiding secondary oxygen pollution

Active Publication Date: 2018-10-23
连云港倍特超微粉有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation methods of alloy powder mainly include plasma rotating electrode, single rod quick quenching, water atomization method and inert gas atomization method. Coarse powder of about 20 meshes; the powder prepared by the single-roller quick quenching method is mostly irregular in shape and high in impurity content; the water atomization method is prone to irregular shape and poor sphericity due to the fast cooling rate, and The disadvantage of high oxygen content in the product; although the sphericity of the product produced by the inert gas atomization method has been greatly improved and the yield of fine powder is high, the sphericity of the produc...

Method used

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  • A device and method for producing metal alloy spherical powder for 3D printing
  • A device and method for producing metal alloy spherical powder for 3D printing
  • A device and method for producing metal alloy spherical powder for 3D printing

Examples

Experimental program
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Effect test

Embodiment 1

[0059] The 100-mesh and finer 316L stainless steel powder produced by the water spray method is used as raw material to produce spherical 316L stainless steel powder products of 20μm-80μm, with an output of 80kg / h.

[0060] The maximum power of the DC arc induction plasma generator in this embodiment is 800kW, and the actual power during production is adjusted to 500kW. The inner diameter of the spheroidizing forming chamber (4) is equal to 1.6 times of the inner diameter of the plasma heating and melting furnace 3 above it, and its height is 1.0m; the cooling reducing gas inlet pipe (8) is located at 0.10m away from the top of the spheroidizing forming chamber (4), The diameter of the circle formed with the front ends of the four cooling reducing gas inlet pipes (8) in the spheroidizing chamber (4) is 1.3 times the inner diameter of the plasma heating melting furnace. The diameter of the cooling reduction gas inlet pipe (8) is φ12mm. The inner diameter of the fluidized bed r...

Embodiment 2

[0068]100 mesh and finer Ti6Al4V alloy powder produced by inert gas spraying method is used as raw material to produce spherical Ti6Al4V alloy powder products of 20μm-80μm, with an output of 100kg / h.

[0069] This embodiment uses an induction plasma generator with a maximum power of 1000kW, and the actual power during production is adjusted to 500kW-800kW. The inner diameter of the spheroidizing forming chamber (4) is equal to 1.8 times of the inner diameter of the plasma heating and melting furnace 3 above it, and its height is 1.3m; the cooling reducing gas inlet pipe (8) is located at 0.20m away from the top of the spheroidizing forming chamber (4), The diameter of the circle formed with the front ends of the four cooling reducing gas inlet pipes (8) in the spheroidizing chamber (4) is 1.4 times the inner diameter of the plasma heating melting furnace. The diameter of the cooling reducing gas inlet pipe (8) is φ14mm. The inner diameter of the fluidized bed rapid cooler (5)...

Embodiment 3

[0077] Using the titanium metal powder less than 100 mesh produced by the inert gas spray method as raw material, the spherical titanium metal powder product of 20μm-80μm is produced, and the output is 120kg / h.

[0078] This embodiment uses a diffused arc plasma generator with a maximum power of 1000kW, and the actual power during production is adjusted to 500kW-600kW. The inner diameter of the spheroidizing forming chamber (4) is equal to 1.8 times of the inner diameter of the plasma heating and melting furnace above it, and its height is 1.2m; the cooling reducing gas inlet pipe (8) is located at 0.15m from the top of the spheroidizing forming chamber (4), and The diameter of the circle formed by the front ends of the four cooling reducing gas inlet pipes (8) in the spheroidizing forming chamber (4) is 1.25 times the inner diameter of the plasma heating and melting furnace. The diameter of the cooling reducing gas inlet pipe (8) is φ10mm. The inner diameter of the fluidized...

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Abstract

The invention relates to a device and method for producing metal alloy spherical powder for 3D printing. The device includes an inert gas replacement tank, a feeding distributor, a plasma heating and melting furnace, a spheroidizing chamber, Fluidized bed rapid cooler, the method of the present invention is on the basis of using thermal plasma to spheroidize fine metal alloy powder, and adopts a second entry of reducing gas to further reduce the high-temperature powder in the spheroidizing and forming stage; At the bottom, the high-temperature powder is quenched by a fluidized bed composed of inert gas and spherical metal alloy powder of the target product. Relying on the extremely high heat transfer and cooling effect of the fluidized bed, the high-temperature metal alloy powder is rapidly cooled, making Mass production is possible; at the same time, because the cooling method does not involve the contact of high-temperature powder and oxygen-containing substances, secondary oxygen pollution is avoided, thereby ensuring that the oxygen content in the product reaches the standard.

Description

technical field [0001] The invention combines plasma technology and fluidized bed rapid cooling technology to produce metal alloy powder in batches, relates to a device and method for producing metal alloy spherical powder for 3D printing, and belongs to the technical field of 3D printing. Background technique [0002] 3D printing (additive manufacturing) technology, especially the 3D printing technology of complex metal components, has become one of the most concerned emerging technologies in the world. Compared with the traditional machining process, 3D printing technology is not limited by the geometric shape of the parts, reduces expensive costs, shortens research and development time, low labor costs, and does not require pre-processing and post-processing processes, making it a very useful tool. potential technology. In order to obtain high-quality metal alloy formed parts, in addition to important conditions such as process, equipment and software, metal alloy powder...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F1/00B33Y70/00
CPCB22F9/08B33Y70/00B22F1/065
Inventor 孟令光胡硕真黄宏宇呼和涛力郑兰君王秀霞
Owner 连云港倍特超微粉有限公司
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