Possibilities for increasing the purity of steel in production using secondary-metallurgy equipment

摘要

The possibilities for increasing the purity of steel during the production of the liquid phase using secondary metallurgy mainlyrelate to affecting the number of emerging occlusions, their size, morphology and chemical composition. The metallographicpurity of steel during production in an electric-arc furnace (EAF), in a ladle furnace (LF) and during processing with VDcaisson technology was assessed. The steel samples were processed by means of an electron microscope and weresimultaneously tested using the single-spark-evaluation (SSE) method.The aim of this investigation was to find the possibility for an operative steel-quality control and to obtain the desiredmechanical properties already while processing the liquid phase.