Electroslag remelting experiments have been carried out on En 24 steel using two slag compositions in indigeneously constructed 350 KVA DC and 50 KVA AC ESR units. Detailed quantitative characterisation of the inclusions of different types has been carried out using Quantimet Image Analyser. The inclusion content in terms of volume fraction and density (No/mm2) and their size distribution in the refined ingot and the unrefined steel have been assessed. The chemical composition of selected inclusions has been established by electron probe microanalyser (EPMA). These studies are supplemented by scanning electron microscopy on typical fractured specimens. The present study shows that the DC reverse polarity mode of melting using a slag with higher silica content (10 wt%) offers the best conditions with particular reference to removal of inclusions and modification of inclusion morphology as compared to the ingots produced by DC straight polarity and AC modes of melting.

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dc.contributor.authorUdupa, K.R.
dc.contributor.authorSubramanian, S.
dc.contributor.authorSastry, D.H.
dc.contributor.authorIyengar, G.N.K.
dc.date.accessioned2026-02-05T11:00:36Z
dc.date.issuedStudies on inclusion characterization in electroslag refined En24 steel
dc.description.abstract1994
dc.identifier.citationMetals Forum, 1994, 17, 3, pp. 225-234
dc.identifier.issn1607952
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/28075
dc.subjectDC straight polarity
dc.subjectElectron probe microanalyzer
dc.subjectQuantimet image analyzer
dc.subjectSize distribution
dc.subjectVolume fraction
dc.subjectCharacterization
dc.subjectChemical modification
dc.subjectComposition
dc.subjectDensity (specific gravity)
dc.subjectElectroslag remelting
dc.subjectInclusions
dc.subjectMorphology
dc.subjectScanning electron microscopy
dc.subjectSteel analysis
dc.subjectSteel ingots
dc.subjectSteel
dc.titleElectroslag remelting experiments have been carried out on En 24 steel using two slag compositions in indigeneously constructed 350 KVA DC and 50 KVA AC ESR units. Detailed quantitative characterisation of the inclusions of different types has been carried out using Quantimet Image Analyser. The inclusion content in terms of volume fraction and density (No/mm2) and their size distribution in the refined ingot and the unrefined steel have been assessed. The chemical composition of selected inclusions has been established by electron probe microanalyser (EPMA). These studies are supplemented by scanning electron microscopy on typical fractured specimens. The present study shows that the DC reverse polarity mode of melting using a slag with higher silica content (10 wt%) offers the best conditions with particular reference to removal of inclusions and modification of inclusion morphology as compared to the ingots produced by DC straight polarity and AC modes of melting.

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