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为了精确掌握连铸机的综合冷却特性,验证铸机模型计算的准确性,进而为优化二次冷却制度提供依据,采用射钉法分别对新钢3号特厚板连铸机中碳钢和高碳钢进行了射钉试验,测量出典型工况条件下矫直区前后位置处铸坯凝固坯壳厚度,并以测得的凝壳厚度为边界模拟预报出凝固终点的位置。从模型计算预报的结果来看,中碳钢在典型工况条件下凝固终点的位置距离弯月面的距离为33.7m,而高碳钢在典型工况条件下凝固终点的位置距离弯月面的距离为27.6m。射钉试验与凝固模拟相结合预报的凝固末端为末端大压下位置设定提供了理论依据。
In order to accurately grasp the comprehensive cooling characteristics of continuous casting machines and verify the accuracy of the calculation of the casting machine model, and to provide a basis for optimizing the secondary cooling system, High-carbon steel was subjected to a nailing test, and the thickness of the slab solidified at the front and the back of the straightening zone under typical working conditions was measured. The position of the solidification end point was predicted and simulated based on the measured thickness of the condensed shell. From the results of model calculation and forecasting, the distance from the meniscus to the end point of the solidification condition of the medium carbon steel under typical working conditions is 33.7m, while the position of the end point of solidification of the high carbon steel under typical working conditions is from the meniscus The distance is 27.6m. The combination of nailing test and solidification simulation predicts that the coagulation tip provides the theoretical basis for setting the position under the great pressure.