Mathematical Simulation of Process Parameters in the case of Rapid Solidification of Steel
Mathematical Simulation of Process Parameters in the case of Rapid Solidification of Steel
复制标题
钢材快速凝固过程参数的数学模拟
DOI：
--
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
D. Janke
中科院分区：
文献类型：
--
作者：
O. Volkova;H. Heller;D. Janke
在实验室条件下，采用冷铜棒浸入钢浴的方法对钢的快速凝固进行了实验研究。为了更好地了解快速凝固过程中的工艺参数，采用了显式有限差分模型。在计算中，假定冻结钢壳与固体铜之间的换热系数α=40[KW/m2·K]，与温度测量的实验数据符合得很好。该模型可根据工艺条件计算出局部凝固时间(LST)、局部过热还原时间(LShRT)、局部凝固冷却速率(LSR、LCR)和局部凝固及过热还原热流密度(LSHFD、LShRHFD)等凝固参数。对钢浴过热度、钢浴材料、浸体材料、浸体初始温度、浸体几何形状等工艺参数的影响进行了深入的研究。
Rapid solidification of steel was investigated experimentally under laboratory conditions by immersion of cold copper rods in steel baths. For a better understanding of the process parameters during rapid solidification, an explicit finite difference model was employed. In the calculation, a coefficient of heat transfer between a frozen steel shell and solid copper of α = 40 [KW/m2·K] is assumed in good agreement with experimental data derived from temperature measurements. The solidification parameters such as local time of solidification (LST), local time of the superheat reduction (LShRT), local solidification and cooling rates (LSR, LCR) and local heat flux density of solidification and superheat reduction (LSHFD, LShRHFD) can be calculated using the developed model, in dependence on the processing conditions. This influence of processing parameters, such as steel bath superheat, steel bath material, immersed body material, initial temperature of immersed body and immersed body geometry, were the subject of intensive investigations.