1152 KB16 KB200020262013Aćimović, ZagorkaAndrić, LjubišaPavlović, LjubicaPavlović, MarkoTerzić, Anjaletnik:47številka:6str. 777-780COBISSID:1027498ISSN:1580-2949URN:URN:NBN:SI:doc-RUGJFEEVenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijemulitognjevzdržne oblogepreiskava materialovulitkiulivanjeSynthesizing a new type of mullite lining| Sinteza nove vrste obloge iz mulita|Various possibilities for developing new mullite-based refractory linings that can be applied in a casting process were investigated and are presented in this paper. An optimization of the refractory-lining composition design with the controlled rheological properties was achieved by applying different lining components and altering the lining-production procedure. Mullite was used as a high-temperature filler. A mullite sample was tested with the following methods: X-ray diffraction analysis, differential thermal analysis and scanning-electron microscopy. The particle shape and particle size were analyzed with the program package for an image analysis called OZARIA 2.5. It was proved that an application of this type of lining has a positive effect on the surface quality, structural and mechanical properties of the castings of Fe-C alloys obtained by casting into sand molds, according to the method of expandable patterns (the EPC casting process)V članku so predstavljene različne možnosti za razvoj nove mulitne ognjevzdržne obloge, uporabne pri postopku ulivanja. Optimiranje sestave ognjevzdržne obloge s kontroliranimi reološkimi lastnostmi je bilo doseženo z uporabo različnih sestavin obloge in s spremembo postopka izdelave obloge. Mulit je bil uporabljen kot visokotemperaturno polnilo. Vzorec mulita je bil preiskovan z naslednjimi metodami: z rentgensko difrakcijo, diferenčno termično analizo in vrstično elektronsko mikroskopijo. Oblika in velikost zrn sta bili določeni s programsko opremo za analizo slik OZARIA 2.5. Dokazano je bilo, da uporaba te vrste obloge ugodno vpliva na kvaliteto površine, strukturo in mehanske lastnosti ulitkov iz Fe-C zlitin pri ulivanju v peščene forme po metodi ekspandirane pene (EPC-postopek ulivanja)TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije