Abstracts Book - IMRC 2018

• SE5-P008
SEGREGATION AND MICROSTRUCTURAL DEVELOPMENT BY
THERMO-MECHANICAL TREATMENT OF Fe-Mn-(Al, Si) TRIP/TWIP
STEELS
Leobardo Portuguez Pardo 1 , Gerardo Peralta Perez 1 , Josè Luis Jasso Morales 1
1 Escuela Superior de Ingeniería Química e Industrias Extractivas, Department of Metallurgy
and Materials Engineering, Mexico.
Recent development in Fe-Mn-Al-Si steels with high manganese content
demands for more research in thermo-mechanical treatment and development
of microstructure. The different contents of Mn, Si and Al in the TRIP/TWIP steels
promote big variations in the melting point of the steels and very high tendency
to segregation, inclusion formation and other solidification defects. The hot
working conditions on forming the structure and course of the heat activated
processes can be affected by those phenomena. In this work, three high
manganese austenitic TRIP/TWIP steels containing two Mn concentrations were
developed and studied in the as cast condition and after hot deformation.
Additionally, one of the steels were microalloyed by Nb and Ti in order to control
the grain growth under hot working conditions. Steels were prepared by
induction melting in an argon inert gas atmosphere and cast to sand and iron
ingots. The ingots were forged at about 1050 °C until the size for the sample.
Detailed characterization by calorimetric studies, X-ray diffraction, optical
microscopy and SEM were made in order to monitoring the development of the
segregation, phase formation and grain growth by thermomechanical
treatments performed in temperature range from 850 to 1050 °C.
Keywords: high manganese steels, thermo-mechanical treatment, TRIP/TWIP steels
Presenting authors email: leoba_coraje@hotmail.com