Abstract
Hot strip rolling of steels inherently results in non-homogeneous microstructure and mechanical properties of hot bands. Thermomechanical processing that implies careful selection of rolling temperatures, speeds, reductions and controlled cooling parameters, as well as their accurate in-bar dynamic control allows not only for reducing the inherent microstructure variability but also for attenuating and even eliminating the adverse downstream manifestations of microstructure non-homogeneities. This is especially pertinent to advance high strength steels (AHSS) for automotive applications that have been shown to possess high sensitivity to variations in industrial processing conditions. Examples of industrial data and real time monitoring of hot band microstructure evolution using online non-destructive technique are presented confirming the efficiency of thermomechanical processing in ensuring the proper quality of AHSS sheet products.
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