【摘要】 设计了连铸结晶器弯月面处传热模拟实验,测量了在结晶器振动情况下弯月面处的温度,发现该处的温度随着结晶器的振动而产生周期性的变化.实验结果表明,结晶器振动频率越大,振动幅值、结晶器冷却强度以及结晶器与铸坯间的接触压力越小,因结晶器振动而产生的弯月面温度波动亦越小.据此认为,连铸弯月面温度波动是导致铸坯表面缺陷产生的一个重要原因.基于此“温度波动”现象,分析了包括高频小振幅振动、软接触结晶器电磁连铸、热顶结晶器等诸多技术改善铸坯表面质量的机理.更多还原

【Abstract】 The temperature at the meniscus during continuous casting was measured under mold oscillation by model experiments. It is found that the temperature of meniscus varied periodically along with mold oscillation. According to the experiments, the temperature fluctuation of meniscus decreases with increasing the mold oscillation frequency, decreasing the mold oscillation amplitude, cooling density, and contact pressure between mold and solidification shell. It is considered that the temperature fluctuation of meniscus is a key factor for the surface defect formation of continuous casting billets. Based on the phenomenon, the mechanisms of improving surface quality of continuous casting billets including high frequency and low amplitude mold oscillation, soft-contact mold electromagnetic continuous casting, hot top mold and so on were analyzed.更多还原