3.l2. Explain why the rolling process was invented and
developed.
l3.l3. Flat rolling reduces the thickness of plates and
sheets. It is possible, instead, to reduce their thickness simply
by stretching the material? Would this be a feasible process?
Explain.
I3.l4. Explain how the residual stress patterns shown in
Fig. 13.9 become reversed when the roll radius or reductionper-
pass is changed.
l3.l5. Explain whether it would be practical to apply the
roller-leveling technique shown in Fig. 13.7a to thick plates.
l3.l6. Describe the factors that influence the magnitude of
the roll force, F, in Fig. 13.2c.