Improving Solidification Structure of Continuously Cast Steel by Electromagnetic Stirring

Prediction of Equiaxed Crystal Ratio in Continuously Cast Steel Slab by Simplified Columnar-to-Equiaxed Transition Model

“…On the other hand, ECR increases rapidly when DT falls below 18°C, which is equivalent to almost zero in the mold. Although this behavior, the rapid increase of ECR in low superheat casting, is generally similar to the previous reports, 5,[7][8][9]11,13,36,37) the tendency beyond DTϭ20°C is strictly different from them. This inverse result, the increase in ECR with the increase in DT, however, can be also found in a few reports.…”

“…The calculated results, however, suggest the existence of V c for obtaining the maximum ECR in Steel-1, and the decrease of ECR when V c is increased can be seen with Steel-2. Similar effects of V c on ECR, which increases, 8) decreases, 9) or seems to have a peak 7,36) in relation to V c , were reported. The reason will be discussed in the following chapter.…”

Effect of Stirring on Crystal Morphologies and on Macro-Segregation

“…The solid fraction fs at the position of white band roughly corresponds to that of 0.1 predicted by the numerical heat analysis. The exact fraction solid of the white band, unfortunately, is not sufficiently relevant even though many of the investigations focusing on white band (Takahashi, Kudoh, & Nagai, 1982;Ujiie et al, 1981) were conducted. However, it is considered that white band could be formed in the range from fs=0 to fs≒0.7( at fs>0.67, the liquid in a mushy zone can not freely move) (Takahashi, Kudoh, & Nagai, 1982).…”

Applications of Electromagnetic Field to Continuous Casting Process of Steel

“…The application of EMS (Electro-Magnetic Stirring) to CC process has comparatively long history and first trial of EMS went back to 1960's [2]. Strand EMS opened the door of real application of EMS to CC machine at the late of 1970's [3,4]. The objective of Strand EMS is to acquire the high equiaxed zone ratio for the purpose of suppression of the center segregation.…”