The purpose of this study is to build thermal-induced deformation database of austempered ductile iron (ADI). Because of the grinding deformation with ADI, we need to investigate more about the thermal-induced deformation. Heat treatment of austempering ductile irons is to get greater roughness or high strength ADI. Tempering time is holding on 2.5 hours respectively. Through this study, the relation of ADI and the grinding wheel, surface flatness, surface roughness, to get the ADI best parameters to use in the reality working. The surface flatness, surface roughness, and micro-hardness measurement are conducted in this experiment. The result of this study show that, while the grinding depth of ADI materials is increased, the surface flatness gets better. The surface flatness keeps a constant profile and depends on ADI's dimension. Double side grinding also displays better flatness. But, austempering temperature at 360 ℃ shows more flat than austempering temperature at 300 ℃.
ADI Grinding Flatness