Hot Workability of as-Cast High Manganese-High Carbon Steels

In order to produce new high Mn-high C austenitic steels (Rm>700 MPa), different tests and methods were used to determine a suitable window of process parameters. In-situ melting hot tensile tests and hot compression tests were carried out to investigate the hot ductility, fracture characteristics and flow behaviour during continuous casting and hot deformation of 3 steels with Mn and C contents between 9-23% and 0.6-0.9%, respectively. The results show that these steels are susceptible to interdendritic fracture at high temperatures. Decreasing Mn content improves the reduction of area at high temperatures to 60% or more. Hot deformation loads for processing the investigated steels are not higher in comparison to the stainless steel 1.4301.