Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Metallurgical Quality of Cast Iron Made from Steel Scrap and Possibilities of its Improvement

Version 1 : Received: 19 December 2022 / Approved: 20 December 2022 / Online: 20 December 2022 (04:05:55 CET)

A peer-reviewed article of this Preprint also exists.

Futas, P.; Pribulova, A.; Petrik, J.; Blasko, P.; Junakova, A.; Sabik, V. Metallurgical Quality of Cast Iron Made from Steel Scrap and Possibilities of its Improvement. Metals 2023, 13, 27. Futas, P.; Pribulova, A.; Petrik, J.; Blasko, P.; Junakova, A.; Sabik, V. Metallurgical Quality of Cast Iron Made from Steel Scrap and Possibilities of its Improvement. Metals 2023, 13, 27.

Abstract

In the field of metallurgy, there are many factors that influence the final quality of cast iron. These are mainly charge materials, chemical composition, metallurgical preparation up to the final casting process. Even small deviations from metallurgical processing lead to fluctuations in melt quality and the occurrence of casting defects. Charge materials has a significant impact on the quality of cast iron, especially steel scrap, which is increasingly used from an economic and ecological point of view, especially when melting cast iron in electric furnaces. Cast iron produced from a higher proportion of steel scrap in the charge has higher hardness and tensile strength. On the other side, these cast irons has a higher tendency to chillout, brittleness, shrinkage, pearlitic microstructure, stresses and higher purity due to the difference in hardness at different wall thicknesses of the castings. It is the high hardness that is the problem in the final machining of castings. These negative properties are recorded mainly in heavy thick-walled castings with higher tensile strength and hardness. This negative effect is mainly due to the nitrogen content in the steel scrap. Based on these knowledges, operating melts were realized in the foundry's operating conditions. The influence of steel scrap in the charge and the possibility of eliminating its negative effects on the properties of cast iron were investigated.

Keywords

synthetic cast iron; charge materials; steel scrap; nitrogen in cast iron iron; mechanical properties

Subject

Chemistry and Materials Science, Metals, Alloys and Metallurgy

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