A model and experimental validation to predict heating rates for overlap between ferrite recrystallization and austenite transformation in dual phase steel manufacture

B Bandi, J Van Krevel, N Aslam, P Srirangam - Jom, 2019 - Springer
B Bandi, J Van Krevel, N Aslam, P Srirangam
Jom, 2019Springer
A systematic theoretical and experimental study has been conducted to predict the heating
rates required to obtain a pre-defined percentage of overlap between the ferrite
recrystallization process and the austenite formation process in dual phase steel
manufacture. Isothermal recrystallization kinetics for three different cold-reduced low-carbon
micro-alloyed steels (50%, 60%, and 75%) with ferrite-pearlite-bainite initial microstructures
was evaluated. Using various experimentally determined rate kinetic constants and critical …
Abstract
A systematic theoretical and experimental study has been conducted to predict the heating rates required to obtain a pre-defined percentage of overlap between the ferrite recrystallization process and the austenite formation process in dual phase steel manufacture. Isothermal recrystallization kinetics for three different cold-reduced low-carbon micro-alloyed steels (50%, 60%, and 75%) with ferrite-pearlite-bainite initial microstructures was evaluated. Using various experimentally determined rate kinetic constants and critical temperatures, a continuous heating rate model which predicts the heating rate required for a predefined amount of overlap was successfully developed. The model predicted the heating rates required for a predefined 1%, 15%, 34%, 67%, 88% and 99% of overlap to be 0.2°C/s, 0.9°C/s, 1.8°C/s, 7°C/s, 50.5°C/s and 511°C/s, respectively. The experimentally determined recrystallization percentage values validated the predicted heating rates.
Springer
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