1984 Volume 70 Issue 10 Pages 1392-1399
An accurate estimation of the resistance to hot deformation is one of the most important factors for the gauge accuracy of hot strip sheets. Application of an equation determined by data of single pass deformation to the calculation of the resistance to deformation for high speed continuous hot rolling often causes a considerable error. The main reason for the error lies in the metallurgical phenomena during a multiple deformation process, which are different from those of a single deformation. In this investigation, a new calculation model has been developed which takes the influence of the metallurgical phenomena like recovery and recrystallization on the resistance to hot deformation into consideration. It has been shown that the dislocation density is a suitable quantity which describes the influence of the metallurgical changes on the resistance to hot deformation quantitatively.
The model has been applied to a high speed continuous hot strip mill and a remarkable improvement in the estimation of the resistance to deformation has been achieved.
