The Effect of Late Sulfur Inoculation of Ductile Iron Castings on Nodule Count and Nodularity

Hashim Hassan Ahmed, Hashim Ahmed Ali

Abstract


The addition of Sulfur in Magnesium treated iron was evaluated in ductile irons. At high levels, Sulfur is known as a harmful element, but is also beneficial and essential at lower levels because it leads to suitable nuclei for graphite precipitation. It also modified the nodularity shape of the graphite. In this study ductile iron was prepared in an electric furnace 100Kg capacity, with the base iron melt. Two casts were done, one without Sulfur addition and the other with Sulfur addition to investigate the effect of Sulfur. A late Sulfur addition during post inoculation and after Magnesium treatment produced, high nodule counts, reduce occurrence of carbides and provide excellent nodularity. These results were recorded by the addition of 0.005% of Sulfur by weight equivalent to 0.005 Kg of Sulfur addition.

Keywords


Ductile Iron Castings; late Sulfur addition; Nodule count; Nodularity

Full Text:

PDF

References


C. labrecque, M. Gagne, A. Javaid "Optimize the Mechanical Properties of Thin Wall Ductile Iron Castings", AFS Transactions, paper 05-116(05), 2005, pp 1 - 10. 2. Dix L.P., R. Ruxanda, J. Torrance, M. Fukumoto and D.M. Stefanescu, "Static Mechanical Properties of Ferritic and Pearlitic Lightweight Ductile Iron Castings", AFS Transactions, paper 03-109(05), 2003, pp 1-16. 3. Suarez O.M., E. Barrios Zamudio and C.R. Loper Jr., "On Late Sulfur Addition and Graphite Morphology in High Carbon Ductile Iron", AFS Transactions, paper 03-015(05), 2003, pp. 1 - 10. 4. Riposan I., M. Chisamera, R. Kelley, M.Barstow and R.L. Naro, "Magnesium-Sulfur Relationships in Ductile and Compacted Graphite Cast Iron as Influenced by Late Sulfur Additions", AFS Transactions, paper 03-093(05), 2003, pp. 1 - 15. 5. Suarez O.M., R.D. Kendrick and C.R. Loper Jr., "Late Sulfur Inoculation of Spheroidal graphite Cast Irons", International Journal of Cast Metals Research, Vol. 16 No. 1-3, 2003, pp. 1 - 6. 6. Bakkerus H., and B. Van Der Holst, "Dutch Develop Vortex for Ductile Iron Treatment", Modern Casting, Vol. 71 March 1981, pp. 41-44.


Refbacks

  • There are currently no refbacks.


Sudan Eng. Society Journals