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Influence of electroslag refining on the hot ductility of AISI 4340 steel in torsion

Hebsur, Mohan G and Abraham, KP and Prasad, YVRK (1981) Influence of electroslag refining on the hot ductility of AISI 4340 steel in torsion. In: Journal of Mechanical Working Technology, 4 (4). pp. 341-349.

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Official URL: http://dx.doi.org/10.1016/0378-3804(81)90002-4


Electroslag refining is a useful remelting process by which clean steels can be produced for sophisticated applications. In this investigation, AISI 4340 steel has been electroslag refined and the improvement in its hot ductility has been assessed using hot torsion tests; electroslag refining has improved the hot ductility considerably. The temperature at which peak ductility is obtained has also increased — from 1473 K in the unrefined steel to 1573 K in ESR steel. Results indicate that it should be possible to subject the ESR ingot to much higher strains per unit operation during industrial hot working processes such as forging, which would result in a considerable saving of power. The improvement in hot ductility in ESR steel has been attributed primarily to the removal of non-metallic inclusions and the reduction in sulphur content. From the apparent activation energy estimated from the hot torsion data, the dynamic recrystallization process is identified as the mechanism controlling the rate of hot deformation.

Item Type: Journal Article
Publication: Journal of Mechanical Working Technology
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 21 Aug 2009 10:43
Last Modified: 14 Feb 2019 06:42
URI: http://eprints.iisc.ac.in/id/eprint/21951

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