Investigating the Hot Compression Behavior of a Medium Carbon Low Alloy Steel Using Processing Map

In the present research, the hot working behavior of a steel used in the shell roller manufacturing of twin-roll-casting was studied by means of Bahr Dil 805 dilatometer instrument at temperatures ranging from 950 to 1150 degrees C and at strain rates ranging from 0.001 to 1 s(-1) to a strain of 0.6. OM and SEM microscopy was conducted to evaluate the microstructural changes during hot deformation. For anticipating the safe and unsafe conditions, a processing map was developed on the basis of dynamic material modelling. The results showed dynamic recrystallization as a main deformation mechanism (safe region) was occurred at temperatures ranging from 1000 to 1125 degrees C and strain rates ranging from 0.001 to 0.01 s(-1) with power dissipation of 45-61%. In addition, low temperatures deformation (less than 1000 degrees C) could lead to the cracking or formation of a necklace microstructure.

Automated summary

The present research investigated the hot working behavior of a steel used in twin-roll-casting shell roller manufacturing. The study utilized Bahr Dil 805 dilatometer instrument and examined the material at various temperatures and strain rates. The results indicated that dynamic recrystallization was the main deformation mechanism within specific temperature and strain rate ranges. Deformation at lower temperatures could result in material cracking or the formation of a necklace-like microstructure.