10 KB497 KB10 KB199219991999Bošnjak, BrankaRadulović, Brankoletnik:334 straništevilka:6str. 401-404ISSN:1318-0010COBISSID:201642URN:URN:NBN:SI:doc-607W1RI8enInštitut za kovinske materiale in tehnologijeŽelezarna JeseniceŽelezarna RavneŽelezarna ŠtoreKovine zlitine tehnologijemehanske lastnostimikrostrukturasiva litinaEffect of austempering temperature on microstructure and mechanical properties of unalloyed ductile iron| Vpliv austempering temperature na mikrostrukturo in mehanske lastnosti nelegirane duktilne sive litine|Austempered ductile cast iron (ADI) has emerged in the last several decades as a major engeneering material. The heat-treating of the ductile cast iron produces austempered ductile iron (ADI) with an excellent combination of strength, fracture toughness and wear resistance for a wide variety of applications in automotive, rail and heavy engineering industries. The austempering temperature is the most important parameter in determining both the structure and the mechanical properties of unalloyed austempered ductile irons. It is varied in the range of 250-450°C. The aim of this work was to optimize the microstructure, and consequently the properties of ductile cast iron of composition Fe-3.48C-2.7Si (in wt.%). The analysis of the microstructure was performed by light microscopy. scanning electron microscopy, and X-ray diffractionAustemprana duktilna siva litina (ADI) je postala v nekaj zadnjih letih pomemben inženirski material. To litino izdelamo s toplotno obdelavo duktilne sive litine in ima zelo dobro kombinacijo trdnosti, žilavosti loma in odpornosti proti obrabi. Zato je primerna za uporabo v avtomobilski, železniški in težkih strojnih industrijah. Austempering temperatura je temeljni parameter, ki določa mikrostrukturo in mehanske lastnosti austemprane litine. Ta temperatura je v razponu od 250 do 450°C. Cilj tega dela je bil optimiziranje mikrostrukture in lastnosti duktilne sive litine s sestavo Fe-3,48%C-2,75Si (v ut.%). Mikrostruktura je bila analizirana z optično mikroskopijo, raster elektronsko mikroskopijo in difrakcijo X žarkovTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije