[Kovove materialy - Metallic materials]
    Fri - April 12, 2024 - 23:04 No. of hits : 1740513 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 56 (2018), Issue 4

Effect of Electro Slag Remelting (ESR) on the microstructure and mechanical properties of low carbon bainitic steel
vol. 56 (2018), no. 4, pp. 253 - 263
DOI: 10.4149/km_2018_4_253

It is essential to produce steels free from impurities and inclusions and decrease the segregations as much as possible knowing that the quality of the primary cast steel is a very critical factor influencing its final microstructure and mechanical properties. For this aim, various refinement processes including Electro Slag Remelting (ESR) have been developed to gain high-quality primary steel for subsequent heat treatments and production procedures. This article aims to study the effect of primarily conducted ESR process on microstructural characteristics and final mechanical properties of carbide free low carbon bainitic steels isothermally obtained at 350 and 400 °C. Results indicated that applying the ESR process before the austempering heat treatments was beneficial in steel refinement and production of a clean product free from inclusions. Besides, it has been declared that the amount of the segregation in heat treated material decreased after conducting the ESR process and a much more uniform distribution of alloying elements within the primary austenite could be attained. Uniform primary austenite resulted in finer bainitic ferrites, much more uniform size distribution of bainitic subunits and higher volume fraction of high carbon retained austenite. Finally, it has been shown that higher values of ultimate tensile strength in combination with enhanced elongation and also improved impact toughness properties could be achieved in samples primarily electro-slag remelted.

Key words
Electro Slag Remelting (ESR), low carbon steel, bainite, microstructure, mechanical properties

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.

Article abstracts updated: 2023-10-26 07:45      
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