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High voltage contacts from material which has good conducting properties and resistance to welding

High voltage contacts are manufactured from material which has good conducting properties and resistance to welding, due to frequent switching. Tungsten as an element with the highest melting point is resistant to welding and burning; copper and silver are good conductors. 
    

The production process of such a material consists of pressing and sintering of tungsten powder; than a porous skeleton is obtained, which is later infiltrated by liquid copper or silver. Thus obtained contacts must be additionally machined. Some contact materials are obtained by the method of mixing and sintering metal pressing powders. The technique is advantageous, since some contacts can reach final shape by pressing, without subsequent mechanical machining. 
We manufacture contacts according to customers order and drawings. 

Visokonaponski kontaktiVisokonaponski kontakti
 
 

Visokonaponski kontakti od materijala dobre provodljivosti električne energije i velike otpornosti na svarivanje

Visokonaponski kontakti se proizvode od materijala koji imaju dobru provodljivost električne energije i veliku otpornost na svarivanje, zbog čestih uključivanja i isključivanja. Kao najpogodniji materijal za kontakte pokazao se volfram legiran sa bakrom i srebrom. Volfram kao element sa najvišom tačkom topljenja otporan je na svarivanje i sagorevanje, a bakar i srebro su dobri provodnici.
 
Proces proizvodnje ovakvog materijala odvija se tako što se prvo otpresuje i sinteruje volframov prah i dobije se porozan skelet, koji se kasnije metodom infiltriranja, natapa tečnim bakrom i srebrom. Ovako dobijeni kontakti se moraju naknadno obraditi metodom skidanja strugotine. Manji deo kontaktnih materijala proizvodi se metodom mešanja metalnih prahova i njihovim presovanjem, tako da se kontakti mogu dobiti u finalnom obliku, bez naknadne mehaničke obrade.Kontakte izrađujemo prema zahtevima i crtežima naručioca.