Numerical Simulation of Multi-Pass Hot Rolling of TA1/Q235B Clad Plates

Based on the elastic–plastic thermal coupling finite element method, a two-dimensional model was established to simulate the hot rolling process of a TA1/Q235 clad plate. The evolution patterns of temperature field, stress field, strain field, and rolling force during the rolling process were studied. The results show that the temperature drop effect of heat transfer on the surface of the rolling plate is much greater than the temperature rise effect due to friction, while the temperature at the center of the rolling plate is primarily controlled by the temperature rise effect of plastic deformation; the maximum equivalent strain occurs in the titanium layer, and the cumulative plastic strain gradually increases with the increase in rolling passes. The strain distribution between the base material and the cladding metal tends to be uniform, and the strain difference gradually decreases; the values of equivalent stress are relatively high in the plastic deformation zone of the slab, gradually decreasing from the rolling center toward both sides. The maximum value appears near the Q235B steel base plate and the interface; the rolling force correlates with the compression ratio, reaching its peak value of 41,523 kN in the first pass with the highest compression ratio. The relative errors between simulated and measured values fall within acceptable limits, confirming the reliability of the model.