Abstract
In this paper, the authors chose to study the non-alloy steel grade S235JR, developed in the LD (Lintz-Donawitz) converter from Arcelor Mittal Galati plant, considering the quality and purity improving of the produced steel as a main objective. The correlation of mechanical properties with steel purity, as a result of the liquid steel processing to the continuous casting machine (CC) using three cases was followed. In the first case, the final chemical analysis of the liquid steel was taken at the end of the blowing operation without desulphurisation and degassing. In the 2nd case, the final chemical analysis of the liquid steel for CC was taken after the desulphurisation and chemical and thermal homogenization in the Ladle Furnace (LF) installation. In the 3rd case, the final chemical analysis of the liquid steel for CC was taken after the vacuum degassing, i.e after the treatment in the Ruhrstahl Heraeus (RH) installation.
Published Version
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