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应用连铸结晶器凝固综合模拟装置,研究了结晶器瞬态摩擦阻力随结晶器振动的变化规律。结果显示:在结晶器上部,连铸坯与结晶器之间以粘性摩擦为主,摩擦阻力的变化规律与结晶器振动的速度波形一致。应用结晶器非正弦振动,在保证负滑动期间对初始凝壳的压缩作用的同时,可以大幅度降低正滑动期间的结晶器摩擦阻力。这对防止高速连铸初始坯壳的拉裂、提高拉坯速度有重要意义。
The continuous casting mold solidification integrated simulation device was used to study the variation of the transient frictional resistance of the mold with the vibration of the mold. The results show that in the upper part of the mold, the viscous friction is the main part between the slab and the mold, and the variation of the frictional resistance is in accordance with the velocity waveform of the mold vibration. The non-sinusoidal vibration of the mold can greatly reduce the frictional resistance of the mold during the positive sliding while ensuring the compression of the initial condensed shell during the negative sliding. This is of great importance in preventing the cracking of the initial blank shell at high speed continuous casting and increasing the casting speed.