Thermal Stress Evolution of the Roll During Rolling and Idling in Hot Strip Rolling Process

Theoretical and experimental investigation of thermal and oxidation behaviours of a high speed steel work roll during hot rolling

“…Strain-life of a work roll during hot rolling was calculated by Corral et al [24] by means of a hybrid, analytic-numerical model, and temperatures and thermal stress/strains in the roll under various cooling conditions was predicted by Saha et al [25] applying a mathematical model. In addition, thermal stress and temperature variations within work rolls in hot strip rolling have also been modelled by Fisher et al [26], Serajzadehet al [27,28], Benasciutti et al [29] and Na et al [30], respectively. In addition to modelling the temperature and thermal stress variations of work rolls as mentioned in the above literatures, analysis on the geometry of water spray and work roll thermal crown profile has also been done as reported in Refs.…”

“…However, it has been found that very limited reports on temperature analysis of HSS work rolls were available after a careful literatures review. Only two reports [4,30] have been conducted based on practical industrial steel hot rolling process.…”

“…In the natural air cooling region, the heat loss from the work roll surface is assumed to take place by convection and radiation [30]…”

“…As described in Eq. (3), a two-dimensional finite element model can be reasonably assumed to study the thermal problem of the work roll during hot rolling, by neglecting the temperature variation along the longitudinal direction [4,7,8,[30][31][32]. In this study, a similar two-dimensional assumption has been applied in a finite element model and the schematic…”

Application of neural networks to minimize front end bending of material in plate rolling process

“…Therefore, the partition coefficient C p in equation (4) was set to be 0.5. Sun et al 19 and Na et al 27 also assumed that C p = 0.5. n t and n t in equation (4) are the tangential components of the velocity vectors of the material and work roll, respectively. t fr , s n , and m in equation (5) are the tangential (friction) stress, normal stress, and the Coulomb friction coefficient, respectively.…”