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Faculty of Metallurgy and Technology Travnička cesta 1, Zenica, University of Zenica , Zenica , Bosnia and Herzegovina
Faculty of Metallurgy and Technology Travnička cesta 1, Zenica, University of Zenica , Zenica , Bosnia and Herzegovina
Livnica Turbe, Pobjeda d.d Tešanj Travnik , Travnik , Bosnia and Herzegovina
Austempered Ductile Iron (ADI) is obtained by exactly controlled heat treatment process of nodular cast iron. Ductile iron samples are first austenitised to dissolve carbon, then quenched rapidly to the austempering temperature to avoid the formation of deleterious pearlite or martensite. Resulting ausferrite microstructure consists of acicular ferrite embedded in stabile retained austenite. A new microstructure results with capability superior to many traditional, high performance, ferrous and aluminum alloys. Influence of heating rate on stability during working life of ADI casting, using thermal analysis (DTA), is presented in this paper.
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