EFFECT OF DIFFERENT CASTING PARAMETERS ON THE CLEANLINESS OF HIGH MANGANESE STEEL INGOTS COMPARED TO HIGH CARBON STEEL

Nowadays, the demand of excellent steel properties leads to the birth of new steel grades such as high manganese TWIP and TRIP steels which are scientifically investigated in the framework of the SFB 761 " Steel - ab initio" in Germany. However, this demand brings new challenges to steel producers with regard to the production of these high-technology products, which are mostly produced by ingot casting. The major defects of cast ingots like cavity, macro segregation, surface quality and cleanliness as well as as-cast structure and the position of CET-zone are systematically investigated at the RWTH Aachen University. One low alloyed carbon steel and one high manganese alloyed steel with different casting parameters with regard to superheat, casting atmosphere, pouring rate, hot top and stirring conditions have been studied in this paper. The main focus of this research is the investigation of the cleanliness of the ingots of both steel grades.