Optimization of Continuous Casting Parameters for High Carbon Steel Billet and Control of Central Segregation of Billets

The effects of casting speed,secondary cooling intensity,F-EMS current intensity and stirring frequency on the central segregation of high carbon steel SWRH82B billets,which were produced by billet casters using both M-EMS and F-EMS,were studied.It was shown that compared with manganese and chromium,carbon has the severest central segregation,the other two obviously have central segregation too.With F-EMS current intensity increases,V-segregation is scattered,and central segregation index for carbon increases after decreases,it has the lowest level when current intensity is 350 A.With F-EMS stirring frequency increases,central segregation index for carbon increases after decreases,it's profitable to set stirring frequency as 6 Hz in order to control segregation.It is favorable to control the central segregation of billets by improving secondary cooling intensity.The faster casting speed is,the severer central segregation becomes.Cas ting speed of billet casters can be risen if F-EMS is used,and the central carbon segregation of billets can be control at a low level simultaneously.