Abstract：In terms of two different pressure distribution locations in soft reduction, the segregation and density of pipeline steel slab from two furnaces were compared by original position statistic distribution analysis. The segregation, loose part and their variation in pipeline steel slab were quantitatively detected. The defects and porosity of slab could be intuitively presented from the two-dimensional contour map of carbon distribution and density. The experimental results indicated that the steel composition, tundish temperature, degree of superheat, drawing speed and reduction quantity were same in continuous casting process. When the distribution locations in soft reduction were different, the segregation and density of carbon in testing samples were also different. The segregation and density of slab could be improved by various reduction locations, thus improving the quality of the slab.
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