Fabrication of ADI Using S.G Cast Iron

Abstract

Austempered Ductile Iron (ADI) is a type of graphite cast iron produced by an isothermal heat treatment process. It is an alternative to traditional steel castings and forgings and even aluminium due to the exceptional mechanical properties such as high strength, good toughness and excellent machinability. Tempering is an effective method to increase the mechanical properties of SG Cast Iron by modifying its microstructure. In the present research, the transformation of SG Cast iron after applying various tempering temperatures was investigated. Mechanical properties of SG Cast Iron before and after heat treatment at various tempering temperatures were measured. The mechanical properties of SG Cast iron after heat treatment were enhanced and the resulting metal formed can be called as ADI (Austempered Ductile Iron). Thus the tempering temperatures must be carefully selected so that excellent properties of ADI are achieved.