Properties of ausformed austempered ductile iron (AADI) containing Ni

摘要

The abrasion wear behaviours of Ausformed Austem pered Ductile Iron (AADI) and conventional Austempered Ductile Iron (ADI) were investigated. The effects of both Ni content and rolling reduction during the ausforming process on the wear resistance of AADI and ADI were studied. The ausforming process created a finer and more homogeneous ausferrite structure that had a direct influence on the mechanical properties of AADI. Maxi mum hardness and tensile strength were obtained with 35% rolling reduction. On the other hand, ductility and impact strength were reduced with increasing rolling reduction during the ausforming process. AADI showed superior abrasion wear resistance because of its finer and harder structure.