Deformation of slab at segment during dynamic soft reduction of casting 200 mm x 1 600 mm stainless steel slab has been simulated by soft ware ANSYS. It is obtained that the effective compensation of roll gap at No.l to No.11 of segment is 0.2 ~ 1.0 mm. Production application results show that with casting speed 0.7 m/min and 0. 9 m/min

dynamic soft reduction rate 0.8 ~ 1.4 mm/m

total reduction 1.30 〜4.56 mm

the center segregation of slab all improves and the error of thickness of slab between measured and given value is less than 0. 5 mm； at casting speed 0.7 m/min

as without using dynamic soft reduction the center segregation index of C and S is 1. 3

while with dynamic soft reduction rate 1. 2 mm/m

solidification rate at reduction zone is 20% 〜50%

the center segregation index of C and S decreases to 1.05.