Abstract
The high temperature deformation behaviour of high silicon steels, their continuous cooling to room temperature and the time delay between deformations are important factors for the understanding of their workability. Torsion tests were carried out in two Fe–Si steels with 4.2 and 5.6 wt% Si under continuous cooling to study the influence of the strain and the interpass time on the ordering and non-recrystallisation temperatures by means of the evolution of the mean flow stress (MFS). 57Fe Mössbauer spectroscopy was used in order to obtain information about the degree and type of ordering in the alloys and to find out its dependence on the applied thermomechanical treatments. Finally, extrapolating the parameters obtained in hot torsion to the rolling mill a suitable schedule for hot rolling was provided in order to guarantee good conditions for further cold rolling.
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