General
Hot rolling - Rolling theory

In terms of the thermomechanics of metal flow in hot rolling, the main useful quantities are as follows.

• The final geometry of the product: to take only the simple example of flat-rolling slabs or sheets, we observe :

  • geometric defects at the head and foot (cat's tongue, fishtail, figure 1) which are transient effects on engagement and disengagement;

  • a widening, a priori unknown, accompanied by a convex or concave, but not rectilinear, shape of the bank.

  All these defects lead to falls (article Heavy sheet metal work in this treatise), which are all additional costs. As for fluted rolling, in...