Manganese is an inexpensive element and a potent hardenability promoter in ductile iron, but in this role it has the inherent limitations of severe segregation and carbide formation tendencies. In order to use this material in an actual application, attempts must be made to overcome these limitations. In the present work, the effect of austempering time and austenitising temperature on the impact strength and abrasive wear resistance of 1.5Mn austempered ductile iron (ADI) after austempering at 270°C is investigated. The results show that impact resistance is affected adversely by untransformed austenite volume but this parameter improves the wear resistance of high Mn ADI.
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