The carburizer influence on the crystallization process and the microstructure of synthetic cast iron

The problems of synthetic cast iron production on the steel scrap and various carburizers (natural and synthetic graphite, petroleum coke, anthracite, cupola coke and charcoal) basis were presented in the paper. Until now the authors in their papers had analyzed mainly carbon assimilation by the liquid metal rate (recarburization efficiency) when these carburizers and various methods of recarburization were used [1,2,3,4]. The analysis covered the chemical composition and the properties of carburizers commonly used in foundries [5,6] and mechanical properties of the cast iron obtained on the steel scrap basis, too [2,7,8,9]. The computer modeling of heating and dissolution of carburizers' particles inside liquid metal were carried out, too [10,11]. The crystallization process of the synthetic cast iron analysis and that produced on pig iron basis for comparison were presented. There was observed that the carburizers change the DTA (Derivative Thermal Analysis) curves in specific temperature ranges. The authors presented some experimental results in form of recorded DTA curves. The presented results show also carburizers microstructures and synthetic cast iron and made on pig iron basis structures, too. The problems given under consideration in the paper has a purpose of set up a discussion on "heredity of cast iron" - some charging materials properties transferred to cast iron. Does such an issue exist and if yes, in what extent it decides of melted alloys properties (synthetic cast iron in described example)?