An analysis of the production and applicability of austempered ductile iron and alloyed AS-CAST bainitic ductile iron

The productions of bainitic ductile iron by austempering heat treatment and byalloying during the casting were investigated. The process parameters of bainitic ductile iron production by the austempering heat treatment and by alloying were analyzed. According to recommended dimensions and geometrical shape of machine parts and required mechanical properties, the chemical composition and appropriate parameters of both processes were determined. A technological and economical comparasion of the production ability and applicability in machine building was done between austempered ductile iron and alloyed as-cast bainitic ductile iron. Limitations in application of both processes were done from comparsion of mechanical properties between machine parts processed by both processes. Realistic cost/benefit analysis and technological comparison between processes ability was done too.