SU900989A1 - Method of producing metallic powders - Google Patents
Method of producing metallic powders Download PDFInfo
- Publication number
- SU900989A1 SU900989A1 SU802913971A SU2913971A SU900989A1 SU 900989 A1 SU900989 A1 SU 900989A1 SU 802913971 A SU802913971 A SU 802913971A SU 2913971 A SU2913971 A SU 2913971A SU 900989 A1 SU900989 A1 SU 900989A1
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- SU
- USSR - Soviet Union
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- jet
- powders
- electric current
- proposed method
- increases
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Description
1one
Изобретение относитс к порошковой металлургии, в частности к способу получени порошков из электропроводных расплавов.The invention relates to powder metallurgy, in particular, to a method for producing powders from electrically conductive melts.
Известен способ получени металлических порошков распылением расплавов сжатым газом или водой 1.A known method for producing metal powders by spraying the melts with compressed gas or water 1.
Недостатком известного способа вл етс возможность окислени порошков .A disadvantage of the known method is the possibility of oxidation of the powders.
- Наиболее близким по технической сущности и достигаемому положительному эффекту к предлагаемому вл етс способ получени металлических порошков со сферической формой частиц распылением струи расплава электродинамическими силами, возникающими при протекании по ней тока, прн котором распыление струи расплава осуществл ют в зоне дугового промежутка, возникак дего между передним фронтом струи и неподвижным электродом 2.- The closest to the technical essence and the achieved positive effect to the proposed is a method of obtaining metal powders with a spherical shape of particles by spraying a melt jet by electrodynamic forces arising from the flow of current through it, prn which the sputtering of the melt jet occurs in the arc gap the front of the jet and the fixed electrode 2.
Недостатками этого способа вл ютс малый выход мелких фракций порошка , изменение состава сплава в процессе распылени , интенсивное разрушение электродов.The disadvantages of this method are the low yield of fine fractions of the powder, the change in the composition of the alloy during the spraying process, and the intense destruction of the electrodes.
Цель изобретени - увеличение дисперсности порошков, стабилизаци The purpose of the invention is to increase the dispersion of powders, stabilize
состава и увеличение срока службы электродов.composition and increase the service life of the electrodes.
Указанна цель Достигаетс тем, что в способе включающем распыление струи расплава пропусканием через нее электрического тока, подачу электрического тока на струю расплава осуществл ют в период замыкани струей расплава электрической цепи, This goal is achieved by the fact that in the method involving the spraying of a melt jet by passing an electric current through it, the electric current is supplied to the melt jet during the period of electric melt closure,
10 а в периоды распада струи расплава на капли подачу электрического тока прекращают.10 and during periods of melt jet disintegration into droplets, the supply of electric current is stopped.
На чертеже изображена схема осуществлени предлагаемого способа.The drawing shows the scheme of the proposed method.
1515
Способ- осуществл етс следующим образом.The method is carried out as follows.
Стру 1 металла, вылива сь из контейнера 2 с жидким металлом 3, контактирующим с электродом 4, па A jet of 1 metal, pouring out of container 2 with liquid metal 3 in contact with electrode 4, pa
20 дает на второй (нижний) электрод 5 и замыкает электрическую цепь, включающую сравнительно мощный источник 6 тока и низкоомные провода 7 и 8. При прохождении через струю 20 gives to the second (lower) electrode 5 and closes an electrical circuit including a relatively powerful current source 6 and low-resistance wires 7 and 8. As it passes through the jet
25 электрического тока в ней возникают электродинамические силы, которые совместно с джоулевым теплом разрывают ее на капли Пауза длитс до того момента, пока неразрушенна 25 electric currents in it arise electrodynamic forces, which, together with Joule heat, break it into droplets. The pause lasts until the moment that is intact.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU802913971A SU900989A1 (en) | 1980-04-23 | 1980-04-23 | Method of producing metallic powders |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU802913971A SU900989A1 (en) | 1980-04-23 | 1980-04-23 | Method of producing metallic powders |
Publications (1)
Publication Number | Publication Date |
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SU900989A1 true SU900989A1 (en) | 1982-01-30 |
Family
ID=20891395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU802913971A SU900989A1 (en) | 1980-04-23 | 1980-04-23 | Method of producing metallic powders |
Country Status (1)
Country | Link |
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SU (1) | SU900989A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007045570A1 (en) * | 2005-10-17 | 2007-04-26 | Ciba Specialty Chemicals Holding Inc. | Apparatus and method for producing metal flakes from the melt |
-
1980
- 1980-04-23 SU SU802913971A patent/SU900989A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007045570A1 (en) * | 2005-10-17 | 2007-04-26 | Ciba Specialty Chemicals Holding Inc. | Apparatus and method for producing metal flakes from the melt |
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