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Analyzing the effect of inoculant addition on the solidification of ductile cast irons using thermal analysis

Bahubali Babanrao Sangame (Department of Mechanical Engineering, Sinhgad College of Engineering Vadgaon, Pune, India and Department of Mechanical Engineering, Sharad Institute of Technology College of Engineering, Yadrav, India)
Y. Prasannatha Reddy (Department of Mechanical Engineering, Sinhgad College of Engineering Vadgaon, Pune, India)
Vasudev D. Shinde (Department of Mechanical Engineering, DKTE Society’s Textile and Engineering Institute, Ichalkaranji, India)

World Journal of Engineering

ISSN: 1708-5284

Article publication date: 21 December 2022

3

Abstract

Purpose

The final properties of ductile iron are decided by the inoculant processing while pouring the melt. The shape and size of nodules generated during solidification are of paramount importance in solidification of ductile cast iron. The purpose of this study is to examine the effect of different inoculant addition on the solidification of ductile cast iron melt through thermal analysis.

Design/methodology/approach

Thermal analysis has recently grown as a tool for modeling the solidification behavior of ductile cast irons. Iron properties will be predicted by analyzing the cooling curve patterns of the melts and predicting the related effectiveness of inoculant processing. In this study, thermal analysis is used to evaluate the need for inoculation.

Findings

The amount and type of inoculation will affect the amount of undercooling during the solidification of ductile cast iron. It is found that the addition of 0.1 to 0.4 Wt.% inoculant lowers the austenite dendrite formation starting temperature while increasing the eutectic freezing temperature. Microstructure analysis revealed that the addition of inoculation increases the nodule count from 103 to 242 nodules. The beneficial effects of inoculation are sustained by an improved graphitization factor, which shows the formation of graphite nodules in the second phase of the eutectic reaction.

Originality/value

The inoculation treatment has improved metallurgical occurrences such as carbide to graphite conversion, graphite microstructure control, graphite nodule count at the start of solidification and the last stage of solidification, which determines the soundness of casting. The foundry industry can follow these steps for monitoring the solidification of ductile iron castings.

Keywords

Acknowledgements

The authors are grateful to Top Gear Industries Ltd., Hatkanangale, Kolhapur, India, for allowing melting trials, inoculation testing and assistance in performing thermal analysis.

Funding: This research received no specific grant from any funding agency in the public, commercial or not-for-profit sectors.

Declaration of conflicting interests: The authors declared no potential conflicts of interest concerning the research, authorship and/or publication of this article.

Citation

Sangame, B.B., Reddy, Y.P. and Shinde, V.D. (2022), "Analyzing the effect of inoculant addition on the solidification of ductile cast irons using thermal analysis", World Journal of Engineering, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/WJE-07-2022-0272

Publisher

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Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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