Investigation of the Mechanical Properties of Ductile Iron Produced from Hybrid Inoculants Using Rotary Furnace

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Author(s) Alasoluyi. J.O | Omotoyinbo J. A. | Olusunle S.O.O. | Adewoye O.O.
Pages 388-393
Volume 2
Issue 5
Date May, 2013
Keywords Hybrid inoculants, Nodulizer, Rotary furnace, mechanical properties.
Abstract

The mechanical properties of ductile iron produced from hybrid inoculants using the rotary furnace were investigated. Four heats were carried out and powdered graphite with ferrosilicon mixed in ratio 1:1 (to produce the hybrid inoculants) were used as inoculants.680g of magnesium ferrosilicon was used as nodulizer to treat 40kg mass of molten metal in ladle by sandwich process and poured into sand mould where it was inoculated with 72g of powdered graphite, 72g of powdered ferrosilicon, 36g each of powdered graphite and ferrosilicon mixture and 18g each of powdered graphite and ferrosilicon mixture respectively to produce 30kg ductile iron casting. Standard test samples were prepared from the castings obtained for each inoculation process and analyzed to obtain the mechanical properties. Increase in graphite addition resulted in increase in tensile strength and hardness and reduction in fracture toughness was observed. However, increasing the amount of ferrosilicon in the hybrid inoculant resulted in increase in fracture toughness but reduction in tensile and hardness values.

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