Abstract: Based on plant trials and the 2D slice solidification and heat transfer model validated by pin shooting test, the influence of the FEMS implemented positions and technology parameters on the strand internal quality has been compared and analyzed. Under the casting speed ranged from 0.36 m/min to 0.45 m/min, the strand center carbon segregation degree of the solute element, C, and the degree of center porosity and shrinkage cavity for the casting longitudinal section are firstly decreased and then increased with the increasing of casting speed. The increasing running current is beneficial to the improvement of casting internal quality in the range of the rated operation current. The optimal casting speed, working current and frequency of the FEMS for the GCr15 steel casting with the section size of 380 mm×490 mm under the present caster equipment are 0.4 m/min, 700 A and 4 Hz respectively.

Key words: bloom continuous casting, final electromagnetic stirring, implemented position, center segregation