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薄腹板异形坯更体现了近终形的特点。采用有限元数值模拟计算了薄腹板异形坯连铸温度场,分析了不同拉速、比水量对连铸过程温度、坯壳厚度和液芯长度的影响。结果表明:异形坯不同位置的温度和坯壳厚度不均匀,当异形坯腹板较薄时,腹板处凝固传热较慢,腹板处和R角处坯壳最薄弱,比翼缘边部薄约4mm;拉速每提高0.1m/s,异形坯出结晶器时的表面温度会提高约80~100℃,坯壳厚度会减薄0.8~1.2mm,液芯长度增加1.2~1.6m;比水量每提高0.05L/kg,异形坯出二冷段时的表面温度会降低约8~16℃,液芯长度缩小0.13m。
Thin web shaped blank more reflects the characteristics of near net shape. The finite element numerical simulation was used to calculate the temperature field of thin web blank continuous casting. The effects of different drawing speeds and specific water volumes on the temperature, shell thickness and liquid core length were analyzed. The results show that the temperature and the thickness of blank shell are not uniform at different positions of blank. When the web of blank strip is thinner, the heat transfer in the web is slower and the shell is the weakest at web corner and corner R, The thickness of the blank shell is reduced by 0.8 ~ 1.2mm, the length of the liquid core is increased by 1.2 ~ 1.6m; when the drawing speed is increased by 0.1m / s, the surface temperature of the blank when the blank is out of the mold is increased by about 80 ~ 100 ℃; For each increase of 0.05L / kg than the water amount, the surface temperature of the blank out of the second cooling zone will be reduced by about 8-16 ℃ and the wick length will be reduced by 0.13m.