Recent Developments in Thermomechanical Processing of Steels (original) (raw)

AISTech2020 Proceedings of the Iron and Steel Technology Conference

Abstract

The use of thermomechanical control processing during hot rolling has played a significant role in improving the mechanical properties of steels in the past several decades. Accurate control of various metallurgical phenomena such as recrystallization, phase transformation and strain-induced precipitation has been the main target of steel industries around the world to push the properties of steels to their limit. Therefore, numerous physical and numerical simulations of hot rolling were developed to predict the microstructure and properties of steels during thermomechanical processing, which allows for quick optimization of manufacturing parameters. One of the most common techniques to physically simulate the actual hot rolling process in a laboratory scale is through hot torsion testing. In the present work, various grades of steels subjected to torsion simulation of hot strip and plate rolling were analyzed to determine the effect of deformation on the initiation of various metallurgical phenomena. The results show that high-temperature deformation can induce unusual metallurgical phenomena, such as dynamic phase transformation, which affects the final microstructure and mechanical properties of steels. These new findings can be employed to accurately control the volume fraction of phases in steels during cooling on the runout table after hot rolling. C. Aranas (left) Assistant Professor, Department of Mechanical Engineering, University of New Brunswick, Fredericton, N.B., Canada (clod.aranas@unb.ca)

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