COMPARISON OF HIGH TEMPERATURE PROPERTIES AND THERMAL SHOCK OF AUSTEMPERED DUCTILE IRONS (ADI) WITH THOSE OF PEARLITIC DUCTILE CAST IRONS

Strength at elevated temperatures and thermal shock resistance of austempered ductileirons at high temperatures has been less intentioned, because of instability ofausferrite phase. inthis research the tensile properties of this iron and pearlitic ductile cast iron have beeninvestigated by short time high temperature tensile tests. also thermal shock tests were done atthe molten lead bath at 1000 cc . in these experiments, at first samples were immersed partially inthe molten lead bath for 25 seconds and then either cooled in air or quenched in water. results ofshort time high temperature tensile and thermal shock tests showed that adi samples have higherstrength and shock resistance than the pearlitic ductile samples.