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双辊铸轧过程控制是一个高度复杂的工程问题,熔池流场和温度场的稳定性直接影响着带坯的质量。研究铸轧工艺参数对流场、温度场的影响规律,对于得到厚度均匀的板带具有重要意义。基于立式双辊铸轧工艺构建了1∶1水模型实验平台和标准湍流数学模型,研究了铸轧速度、熔池接触角及浇注温度对熔池流场、液面波动及出口温度的影响。结果表明:在熔池出口附近,由于熔池体积减小而产生液体回流现象,且回流区域面积与铸轧速度近似成正比。铸轧速度越大,出口温度越高,沿板宽方向温差越小。当铸轧速度大于7.2m/min或熔池接触角小于40°时,熔池液面波动过于剧烈,会严重影响板带的质量。
Twin roll casting process control is a highly complex engineering problem, the stability of the flow field and the temperature field in the melt pool directly affect the quality of the strip. Studying the influence law of casting process parameters on the flow field and temperature field is of great significance for obtaining a strip with uniform thickness. A 1: 1 water model experimental platform and a standard turbulence mathematical model were established based on the vertical twin roll casting process. The effects of casting speed, contact angle of the bath and pouring temperature on the flow field, liquid level fluctuation and outlet temperature of the molten pool were studied . The results show that, near the exit of the molten pool, liquid reflux occurs due to the decrease of the volume of the molten pool, and the area of the recirculation zone is approximately proportional to the casting speed. The greater the casting speed, the higher the outlet temperature, the smaller the temperature difference along the width of the plate. When the casting speed is more than 7.2m / min or the contact angle of the bath is less than 40 °, the liquid level in the molten pool fluctuates too violently, which will seriously affect the quality of the strip.