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FME Transactions
2006, vol. 34, br. 3, str. 151-157
jezik rada: engleski
vrsta rada: neklasifikovan

Mikrostruktura i tribološke karakteristike prevlaka na bazi gvožđa nanetih na osnovu od Al legure plazma sprej postupkom u atmosferskim uslovima
aUniverzitet u Beogradu, Mašinski fakultet
bAeronautical Plant 'Moma Stanojlović'
cUniverzitet u Beogradu, Institut za nuklearne nauke Vinča

e-adresa: avencl@mas.bg.ac.yu

Sažetak

Korišćenje legura aluminijuma za izradu blokova motora u automobilskoj industriji rezultira smanjenjem težine i uštedama u potrošnji goriva, a samim tim i smanjenjem zagađenja okoline. Prevlake nanete termički, procesom raspršivanja su jedno od rešenja za poboljšanje, inače loših, triboloških karakteristika aluminijuma. U ovom radu su analizirani mikrostruktura i tribološke karakteristike dva tipa prevlaka na bazi gvožđa i upoređene su sa karakteristikama sivog liva kao standardnog materijala za izradu cilindarskih košuljica. Prevlake su nanete na osnovu od Al-Si legure plazma sprej postupkom u atmosferskim uslovima. Za ispitivanja je korišćen tribometar tipa "epruveta na prstenu" u uslovima klizanja sa podmazivanjem, pri brzini klizanja od 0,5 m/s, pređenom putu od 5000 m i normalnom opterećenju od 450 N. Rezultati triboloških ispitivanja pokazuju da, za date uslove ispitivanja obe prevlake imaju zadovoljavajuće vrednosti habanja i trenja i da mogu biti adekvatna zamena za sivi liv kao materijal za izradu cilindarskih košuljica.

Ključne reči

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