1997 Volume 83 Issue 2 Pages 121-126
A mathematical simulator during accelerated cooling after rolling in steel plates has been developed. The simulator can predict simultaneously the temperature, the thermal stress and the shape defect during cooling with taking the phase transformation into account.
The transverse temperature distributions at the entry of cooling device and at the exit of hot leveller were measured in an actual plate plant, and also the thermal stresses after cooling (the residual stresses) and the cambers after longitudinal cutting were measured. It was confirmed that their values can be predicted by the simulator.
The residual stresses predicted by the above mentioned simulator was compared with those by a simplified elastic method which requires only the transverse temperature distribution at the exit of hot leveller in calculation. When the transformation is finished in all cross section at the exit of hot leveller, both values are completely coincident. But there is a big difference between the two when the transformation is not occurred in all cross section or is occurred partly at the exit of hot leveller.
