Effect of the current intensity and positions of mold electromagnetic stirring on the macrosegregation in the full-length curved continuous casting bloom

Abstract

A full-length curved continuous casting bloom mathematical model, coupling flow field, heat transfer, solidification, and electromagnetic stirring, was established to investigate the effect of the current intensity and positions of mold electromagnetic stirring (M-EMS) on the macrosegregation. M-EMS can optimize the negative segregation in the subsurface of the bloom and the positive segregation in the bloom center. With the current intensity of M-EMS increasing from 0 A to 350 A, the minimum carbon content in the subsurface of the bloom was 0.165%, 0.169%, 0.176%, and 0.182%. The carbon content in the bloom center was 0.246%, 0.243%, 0.241%, and 0.238%. The installation position of M-EMS can change the flow field and then affected the macrosegregation. When the positions of M-EMS were 0.77 m, 0.57 m, and 0.37 m beneath the meniscus, the minimum carbon content of negative segregation in the subsurface of the bloom was 0.174%, 0.182%, and 0.175%. The carbon content in the bloom center was 0.245%, 0.238%, and 0.235% respectively.