Production And Commercialization Of Austempered Ductile Iron

The research work is on the production of Austempered Ductile Iron (ADI) and its commercialization. The materials used include a scrap of grey cast iron, graphite and ferrosilicon magnesium which was used as inoculants. The methodology applied is green sand moulding and casting. The scrap of the grey cast iron was melted in the rotary furnace and poured into the ladle before the inoculants were added. The molten metal was later poured in to the mold and later removed and felted .Machining was done and the product austenitized and salt bathed with Potassium Chloride, Sodium Chloride and Barium Chloride at 8500C. It was later austempered and salt bathed in 500g each of potassium nitrate and sodium nitrate at 4200C.The specimens were later subjected to mechanical testing and the micro-examinations were carried out using optical machine. The results of the test showed that the material is austempered ductile cast iron according to literature. The metal can be produced enemas for commercialization.