| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous-cast steel piece having little center segregation in the whole width and length of the piece, and a method for casting the piece. SOLUTION: This invention relates to a continuous-cast steel piece having a rectangular cross section which is pressed by means of a pair of reduction rolls until the inside of the piece is fully solidified after the piece including part not solidified is bulged, wherein the difference between the maximum and minimum thicknesses in the cross section of the cast steel piece after pressed is 4% or less of the average thickness of both short edges of the cast piece. This invention also relates to a method for pressing the cast steel piece under the reduction force 1.5 to 10 times the static pressure of molten steel at the position of the pair of the reduction rolls per pair of the reduction rolls, in pressing the cast steel piece with the pressing amount equal to or less than the bulging amount by means of one or more pairs of the reduction rolls until the inside of the cast steel piece is fully solidified after the cast piece is bulged.
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