Effect of Strontium Addition in Graphite Morphology and Nodularization of Hypoeutectic Cast Iron

Abstract:

Nodular graphite cast iron or known as spheroidal graphite cast iron structurally has a spherical graphite morphology with a matrix consisting of a ferrite-pearlite phase. In general, cast iron has a main alloy consisting of carbon and silicon where both elements have an influence on the potential of graphitization and castability. In this work, the influence of strontium (Sr) added to molten cast iron with a composition of 0, 0.04, 0.06 and 0.08 wt% to graphite morphology were studied. The sample obtained will be carried out a characterization process by observing macro and microstructures using optical microscope equipped with image data processing software that displays graphite fraction, size, form and nodularity. Analysis showed that Sr addition increase in nodularization of graphite from 19.6 % to 31.5% at 0.08 wt% Sr addition.

• Periodical: Materials Science Forum (Volume 1000)
• Pages: 454-459
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1000.454
• Online since: July 2020
• Authors: Rahmadi Rahmadi, Deni Ferdian*
• Keywords: Casting, Graphite Morphology, Nodular Cast Iron, Strontium

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