CONTINUOUS CASTING METHOD AND APPARATUS THEREFOR

摘要

The reaction force/reduction controller selects a pivot reduction roll such that the thickness of the solidified shell of the cast slab having a liquid core is equal to the target thickness Tref , and calculates a difference between a thickness Tin of the cast slab having a liquid core at the inlet of the reduction roll zone PRT and the target thickness Tref, i.e., DELTA T. The resulting value of DELTA T, i.e., a target reduction is provided to the reduction controllers 2 of the pivot reduction roll. The reaction force/reduction controller 1 assigns target reductions 1/3 DELTA T and 2/3 DELTA T to the two reduction rolls upstream of the pivot reduction roll. The reaction force/reduction controller 1 calculates a target pressure (Pi + alpha ) on the basis of the selected value for alpha , and the resulting target pressure (Pi + alpha ) is provided to each of the reduction controllers 2 of the reduction rolls, ... downstream of the pivot reduction roll. <IMAGE>