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Method and device for producing material powder

A powder and equipment technology, applied in the field of equipment for preparing material powder, can solve the problems of increased energy consumption, increased production cost, low availability, etc., and achieves the effects of reduced particle size, good cooling effect, and fine atomization results.

Pending Publication Date: 2022-02-11
金属松木公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this results in a substantial part of the produced material powder being rejected, increased production costs, increased energy consumption per quantity of produced high-quality material powder and reduced profitability
These unfavorable characteristics of traditional methods for preparing material powders are thus reflected in high prices and low product availability on the market for end consumers

Method used

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  • Method and device for producing material powder
  • Method and device for producing material powder
  • Method and device for producing material powder

Examples

Experimental program
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Effect test

Embodiment 1

[0057] In this embodiment of the method according to the invention, 50 kg / h of aluminum are melted at 750°C. The atomizing gas 6 is chosen to be argon introduced at a rate of 150 kg / h at a temperature of 500°C. The corresponding pressure situation is

[0058] Delivery gas pressure: 3bar

[0059] Atomizing gas pressure: 10bar

[0060] A plant pressure of 4 bar is established in the pressure vessel 4 by supplying the atomizing gas 6 and the conveying gas 7 .

[0061] This produces aluminum particles with a mean diameter d50.3 of less than 10 μm, together with a distribution width of d84 / d50<1.6.

Embodiment 2

[0063] Molten stainless steel was produced with an arc 13 generated by a welding current source at a rate of 20 kg / h. A flow of atomizing gas 6 is introduced into the atomizing device 3 with a mass throughput of 150 kg / h and atomizes the molten stainless steel. The arc 13 can be narrowed by the conveying gas pressure in the pressure vessel 4 or by the counterpressure acting thereon. This results in a very uniform atomization. The atomized stainless steel particles had a mean diameter d50.3 of 22 μm and a distribution width d84 / d50=1.38.

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Abstract

The invention relates to a method for producing material powder, comprising: providing a material (5) and an atomizing gas (6), to which an atomizing gas pressure is applied by means of an atomizing gas compressor (2), to an atomizing device (3); melting the material (5) and atomizing the melted material (5) to form material powder by applying the atomizing gas (6) to the melted material (5) by means of the atomizing device (3); introducing the material powder from the atomizing device (3) into a pressure vessel (4); and providing a conveying gas (7), to which a conveying gas pressure is applied by means of a conveying gas compressor (1), to the pressure vessel (4), the conveying gas pressure being above the atmospheric pressure and below the atomizing gas pressure. The invention also relates to a device for carrying out the method.

Description

technical field [0001] The invention relates to a method for producing a material powder according to the preamble of claim 1 . [0002] The invention furthermore relates to a device for producing material powders according to the preamble of claim 8 . Background technique [0003] The preparation of material powders from melts by means of atomizing gases is known in the prior art and is carried out on an industrial scale. There are a range of different methods for preparing material powders which can be categorized as external mixing and internal mixing methods. In both method types, a stream of molten material is loaded with an atomizing gas which atomizes the molten material into fine particles. These fine particles produce a material powder. Powder processing methods developed in the past, such as 3D printing with the powder bed method, however, place strongly increased quality requirements on the material powder with regard to particle size, particle size distributio...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F1/052
CPCB22F9/082B22F2009/0888B22F2009/0896B22F1/052B22F2009/084B01D45/12B04C5/24B22F2009/086B22F2009/0832B60H1/00B01D50/00B22F2009/0824B22F2999/00C08J3/122B22F2202/13B22F9/14B22F2009/0852B22F2201/02B22F2201/30C22C1/0416C22C21/00B33Y70/00B22F2203/13
Inventor M·多普勒C·维斯
Owner 金属松木公司