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Method for producting metallic powders consisting of irregular particles

An irregular and granular technology, applied in the field of metal powder, can solve problems such as lack of sintering performance, small powder particle size, inconsistent powder particle size, etc., and achieve the effect of promoting surface area expansion and improving particle size

Inactive Publication Date: 2006-12-20
克莱斯·托恩贝里
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a certain degree of improvement in powder quality can be achieved with this type of device, the size of the powder particles is inconsistent, and the proportion of small irregular spray powder particles is small, and in most cases no good enough sintering properties can be obtained

Method used

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  • Method for producting metallic powders consisting of irregular particles
  • Method for producting metallic powders consisting of irregular particles
  • Method for producting metallic powders consisting of irregular particles

Examples

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Embodiment Construction

[0032] As in figure 1 As can be seen in the schematic diagram in a metallurgical vessel 1, there is a kind of overheated melt, which flows out of the vessel in the vertical direction through a wind eye brick / nozzle body (Düsenstein) 11, forming a casting stream with a diameter of D 2.

[0033] The device 3, which is advantageously designed as a flat beam nozzle device, is used in a first step at an acute angle α with a deflecting medium 31, such as water, a water-gas mixture or a gas, to act on the vertical casting stream 2, wherein the casting stream 2 In the area 32, it is shot so that its surface area is enlarged and widened.

[0034] The broadened pouring stream 21 that is substantially or still continuously distributed over a large area is then loaded by a loading system 4 with a media stream 41 that is advantageously formed to have a wide shape at an acute angle β. When the pouring stream 21 widened in the second step and the medium stream 41 meet, the pouring stream 21 wid...

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Abstract

The invention relates to the production of a metallic powder consisting of surface-fissured, so-called irregular particles, namely a water-atomised metallic powder. The aim of the invention is to obtain an irregular surface form of powder grains (23) in a narrow weight class and to impart a high porosity with a homogeneous distribution to the sintered body. To this end, in a first step, the pouring stream (2) is deviated in its flow direction and is enlarged on its surface, and in a second step, the surface-enlarged pouring stream (21) is deviated again its flow direction and is divided, and the liquid metallic particles (22) formed are accelerated, and in a third step, the displaced liquid metallic particles (22) are applied and divided, at an angle gamma of between 10 and 90 DEG in relation to the displacement direction of the same, with a high speed current (51) formed at least partially from a liquid medium, and the particles (23) are then solidified. According to one embodiment of the invention, in order to reduce the overheating of the metal melt and / or to improve the quality of the metallic powder produced, the pouring stream (2) is deviated in its flow direction and a surface enlargement of the same (21) is carried out, in a first method step, and / or the surface-enlarged pouring stream (21) is deviated and divided, and the formed liquid metallic particles (22) are accelerated, in the second method step, with at least one current (6,31,41) formed from at least one heated gas or heated gas mixture.

Description

Technical field [0001] The invention relates to a method for producing a metal powder composed of so-called spattered particles with surface cracks by a method of loading a stream of molten metal with a fluid medium. Background technique [0002] Metal powder is mainly produced by dispersing liquid melt into particles and then solidifying them. According to the prior art, the tool used to split liquid metal into droplets is mainly a gas or liquid jet, so that the jet acts on the melt stream with high kinetic energy. [0003] If gas is used to load the melt flow, the surface tension of the liquid metal will form substantially circular droplets, which solidify when flying in the device and are placed in a container in the device. This so-called gasverdüst (micronized by spraying water) metal powder with predominantly circular, substantially smooth-surfaced particles is particularly suitable for the manufacture of dense objects or materials, for example, by high-temperature isostati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/088
Inventor 克莱斯·托恩贝里
Owner 克莱斯·托恩贝里
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