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通过对凝固层的受力分析 ,提出了滞留层初期尺寸的预测模型及定量计算方法 ,并据此分析了各工艺因素的影响趋势。结果表明 ,在通常范围内增加结晶器直径或减小其长度、提高凝固系数或提高结晶器内的纵向温度梯度、减小拉坯速度、降低制浆室高度、改善结晶器润滑 ,都可以提高初期裂口的形成位置 ,减小滞留尺寸 ,进而有利于提高半固态连铸过程的稳定性。验证实验表明 ,这一预测模型的误差在 5 %～ 10 %范围内
Based on the force analysis of the solidified layer, the prediction model and quantitative calculation method of the initial dimension of the retention layer are proposed, and the influence trend of each process factor is analyzed accordingly. The results show that increasing the crystallizer diameter or reducing its length over the usual range, increasing the coagulation coefficient or increasing the longitudinal temperature gradient within the crystallizer, decreasing the casting speed, lowering the height of the pulp chamber, and improving the mold lubrication can all be increased The formation of the initial gap to reduce the retention size, and thus help to improve the semi-solid casting process stability. Verification experiments show that the error of this prediction model is in the range of 5% ~ 10%