Experimental investigation on wear behaviour of heat-treated ductile cast iron

Abstract

The present work reports an experimental investigation on influence of heat-treatment on dry sliding wear performance of different amounts of spherodising agents of SG cast iron-ductile cast iron. Ductile cast iron was produced with various levels of spherodising agent (Magnesium) and subjected to austempering. Austemperd ductile cast iron was tested for its wear behaviour at different temperatures. Produced ductile cast iron was chemically analysed and SEM analysis is carried out for austempered ductile cast iron. Mg additions influenced the wear and frictional forces. Both wear loss and frictional force were considered. E-Dax analysis was also made and SEM image of worn surface was studied. It was observed that wear loss increases at lower percentage of spherodising agent. It is observed that ductile cast Iron has high wear at high magnesium content at moderately high temperature 200°c. The optimum conditions of ductile cast Iron for minimum wear loss are temperature 32°c and magnesium 0.04% and the same for minimum frictional forces are temperature 200°c and magnesium% 0.03 are observed. Temperature has greater influence on both wear loss and frictional forces.