Microstructure and Mechanical Properties of Thin Wall Ductile Iron

Abstract

Currently many cast parts are produced in aluminum rather than cast iron, because of the drive to get high strength /weight ratio for application in automobile and aerospace. Ductile Iron casting of approximately 2-3mm section thickness better known as Thin wall ductile iron (TWDI) having high strength /weight ratio and better mechanical properties than Aluminum alloys. The effect of various parameters like, post inoculation, gating and feeding, moulding sand mix on the structure and properties of TWDI were studied and it was observed that for a thin plates decreasing in pouring temperature leads to finer pearlitic structure and increase in hardness. In the present work, the effect of inoculation on thin wall ductile iron castings is analyzed. Three types of potent inoculants were used namely Ce-Ca-Al-S-O-FeSi, Zr-Mn-Ca-Al-Ba-FeSi and Sr-Al-Ca-FeSi. The in-mould inoculation was done. It is observed that Ce-Ca-Al-S-O-FeSi at 0.4 % inoculant provides highest nodule count and a unique wide distribution of nodule size in comparison to thin wall ductile iron (TWDI) inoculated with Zr-Mn-Ca-Al-Ba-FeSi and Sr-Al-Ca-FeSi at 0.4%.

 Cite this Article

Rajat Upadhyaya, Kamlesh Kumar Singh, Rajeev Kumar. Microstructure and Mechanical Properties of Thin Wall Ductile Iron. Journal of Automobile Engineering and Applications. 2017; 4(2): 35–39p.