MANUFACTURING METHOD OF THIN BELT CASTING PIECE

摘要

PROBLEM TO BE SOLVED: To manufacture a casting piece with a good shape by improving a solidification and clamping condition of both casting piece ends in a method for manufacturing a thin belt casting piece with a twin drum type continuous casting machine. SOLUTION: A stepped part is installed at both ends of a cooling drum in a way that height (h) and width (w) corresponding to the casting thickness (t) will satisfy the formula: h>=0.17t-0.017w-0.34. The clamping load of solidification shells at a drum kiss point is made to be 0.1 kg/mm2 or more so as to clamp the solidification shells of both casting piece ends at the drum kiss point, thereby preventing leakage of the semi-solidified molten steel from the both casting piece ends and bulging of the both casting piece ends. In this case, w is 3 mm or more and h is 1/2 or less of the casting thickness.