Quantitative Correlation and Control Strategy for Element Content Fluctuation along Casting Direction in Central Area of Continuous Casting Billet

The statistical correlation was applied to analyze the specific and quantitative relationship between solidification structure central segregation along casting direction in carbon steel billet. On this basis, formation mechanism of solute element related control strategy were investigated. It is found that equiaxed crystal zone fluctuation determines degree segregation. At same time, at a certain position mostly affected by width hysteretic position. Moreover, speed can influence columnar transition (CET) affecting flow molten Overall, elements be summarized into two aspects: First, with growth crystals initial stage, segregated solutes are continuously enriched distributed after CET. will affect distribution billet cause Second, due shrinkage end solidification, solute-enriched liquid phase pumped endpoint forms V-shaped Meanwhile, stable (columnar length or width) measures preceded beneficial reduce