2019 Pittsburgh AISTech

Mathematical Model of Static and Dynamic Recrystallization, Roll Force and Mean Flow Stress of the Nb-Microalloyed Steels for Plain Steel Hot Roughing Mill (Room 412)

07 May 19
3:30 PM - 4:00 PM

Tracks: Metallurgy - Processing, Products & Applications

Speaker(s): Marcelo Lucas Pereira Machado, Instituto Federal do Espírito Santo; Juliana Gomes dos Santos, ArcelorMittal Tubarão

Mathematical models represent a major technological advance. They are capable of predicting the final mechanical properties and microstructural evolution of steel alloyed from the chemical composition and process conditions. This study proposes a mathematical model capable of predicting the rolling force, mean flow stress, austenitic grain size, and static and dynamic recrystallization, following the methodology defined in the literature for finishing mills and adapted for roughing mills. This study considered parameters such as drawing and roughing temperatures, strain rates, interpass time, recrystallization fractions and geometric relations and found good agreement with industrial data.