Effect of Deformation and Alloying on the Transformation Behaviour of austempered Ductile Iron during Continuous Cooling

摘要

High temperature deformation dilatometry has been employed to study transformation behaviour of ductile irons (unalloyed and alloyed) during continuous cooling. The samples of both irons were first austenitised at a temperature of 900 deg C for 40 minutes, and then cooled to room temperature at rates ranging from 0.025 to 20 deg C/sec. Unalloyed iron was also subjected to deformation by compression during dilatometry and was given 30