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结合珠钢生产实际情况,采用射钉法来测定二冷区不同位置的凝固坯壳厚度,试验结果表明,4.8m/min拉速下铸坯液芯长度为4820mm,4.5m/min拉速下铸坯液芯为4490mm,两种拉速下连铸坯坯壳厚度的实际测量结果与凝固传热模型计算结果一致。整个凝固过程坯壳厚度生长符合平方根定律。
According to the actual production situation of bead steel, the thickness of the solidification shell at different positions in the second cooling zone was determined by the nailing method. The test results show that the casting liquid core length is 4820mm at the speed of 4.8m / min and the pulling speed is 4.5m / min The slab liquid core is 4490mm. The actual measurement results of the slab thickness at two casting speeds are consistent with those calculated by the solidification heat transfer model. The solidification process of the growth of the shell thickness consistent with square root law.