Effect of Compositional Changes on the Mechanical Behaviour of Grey Cast Iron

Abstract

The effect of varied alloying elements onthe mirostructure hardness and tensile properties of gray cast iron has been investigated. 0.1wt%, 0.2wt% and 0.3wt% of ferro-silicon inoculants were added to the stream of the iron melt during tapping for uniform dissolution and later poured into prepared sand mould. The cast samples were prepared for metallographic analysis. Hardness and tensile test were determined with standard samples. Mechanical properties are shown to be a function of the matrix, graphite or carbide forms. The increase in inoculants addition increases the carbon equivalent, but the tensile and the hardness properties were found to decrease. Hardness properties decrease from 58.9HRC to 44.70HRC from un-inoculated to 0.3wt% inoculated grey iron respectively