Optimizing mold taper to improve slab surfaces

Thermo-mechanical Behavior of Peritectic Steel Solidifying in Slab Continuous Casting Mold and A New Mold Taper Design

“…Recently, Berdnikov et al 19,20) proposed a taper with three-part mold wall of narrow face on the basis of shell shrinkage characteristics in slab continuous casting mold and applied to the industrial production. Fedosov et al 21) also optimized the slab continuous casting mold taper by varying narrow face slope by statistical analysis and simulation methods to improve the slab surface quality. These previous works have a common point that the investigation was only focused on the optimization of mold narrow face © 2013 ISIJ structure without considering the influence of mold wide face structure on shell solidification.…”

“…Nevertheless, many efforts have been conducted by developing mathematical models to calculate the shrinkage of solidifying shell in mold with/without the consideration of the mold wall distortion in past decades, and several types of square billet and round billet mold tapers have been proposed and applied in practical continuous casting. 1,6,7,[12][13][14][15][16][17][18]22) However, less attention [2][3][4][5][8][9][10][11][19][20][21] has been paid to the optimization of slab continuous casting mold taper despite numerous studies [23][24][25][26][27][28][29][30] of shell thermo-mechanical behavior in slab mold have been conducted. Currently, most of the practical slab continuous casting molds adopt the conventional mold taper of linear constant narrow face with ignoring the wide face structures since slab continuous casting is characterized the large ratio of width/thickness.…”

Study on the non-uniform slab shrinkage of special steel during slab continuous casting

“…Apparently, the single linear taper is not suitable for the continuous casting of this special steel, and the narrow face taper need to be calculated and optimised. Single linear tapers are also not ideal for all continuous slab casting operations and have been reported so in many reported investigations and also by the plant builders [16][17][18]. Proper taper ensures uniform heat transfer between the mould and steel surfaces, without exerting excessive contact forces on the hot and weak shell.…”