9th ECCC European Continuous Casting Conference – ECCC 2017

Within the scope of the collaborative research center SFB 761 “steel ab initio” the castability of high manganese steel grades with varying aluminum and manganese contents via the continuous casting (CC) route is under investigation. Within the current research the high temperature embrittlement of these high manganese steels in the temperature range of 700 °C – Tliq has been examined, using the hot tensile test machine and a new developed high temperature bending simulator (HTBS) at the Department of Ferrous Metallurgy RWTH Aachen University. The HTBS offers the opportunity to induce mechanical stresses on a strand shell with a liquid core in a laboratory scale. In general these high manganese steels show at high temperature a high susceptibility to cracking. The investigations focus on how the different phases formed during solidification impact the high temperature ductility. To detect the cause of cracking during testing, optical microscopy and scanning electron microscopy (SEM) analysis of the fracture surfaces have been performed and compared to thermodynamic modeling.