Keramički valjci za valjanje čeličnih folija
DOI:
https://doi.org/10.5937/zasmat2301048GKljučne reči:
radni valjci, spljoštenje, očvrščenje deformacijom, silicijumnitrid, Sendzimirova prugaApstrakt
Visoko očvršćavanje čelika, koje je uzrokovano martenzitnom transformacijom kroz hladno oblikovanje, dovodi do značajne lokalne elastične deformacije valjaka (spljoštenja). Valjanje čelika očvršćenog deformacijom zahteva veće sile valjanja i veće obrtne momente, što rezultira visoko opterećenje valjačke pruge. Spljoštenost valjaka može se smanjiti upotrebom valjaka od materijala sa znatno većim modulom elastičnosti. Ispitivana je pogodnost keramičkih materijala za valjke savremenih hladnih i toplih valjaonica. Laboratorijska ispitivanja valjanja sa valjcima od silicijumnitrida vršena su na valjačkoj pruzi sa dva valjaka. Industrijska primena valjaka od silicijumnitrida u valjanju tankih čeličnih folija u Sendzimirovoj valjačkoj pruzi konstantno pokazivala odličnu primenljivost ovog materijala. Pregled sprovedenih istraživanja je pokazao da upotreba radnih valjaka od silicijumnitrida minimizira spljoštenje valjaka i dovodi do značajnog smanjenja sile valjanja.Reference
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