复合铸轧工艺参数对Kiss点的耦合影响

为了获得高质量的层状金属复合材料,依据双辊薄带复合铸轧技术,探究工艺参数间的耦合作用对复合铸轧的影响。采用有限元软件构建了铜和铝的固-液复合铸轧仿真模型,基于该模型,研究了铝板出口厚度、轧制速度、熔池高度、铜带厚度和浇注温度对Kiss点高度的影响,并对正交试验得到的Kiss点高度进行极差分析,得到了铝板出口厚度、轧制速度和铜带厚度3个强耦合参数,给出了这3个参数两两耦合下耦合强度的变化规律。铝板出口厚度和铜带厚度、铜带厚度和轧制速度对Kiss点高度的耦合影响随参数值的增大其效果逐渐减弱,铝板出口厚度和轧制速度对Kiss点高度的耦合影响随参数值的增大其效果逐渐增强。同时,利用复合铸轧熔池物理场的变化,分析了产生耦合的原因。

Coupling effect for technological parameters of compound casting and rolling on Kiss points

In order to obtain high-quality laminated metal composites, the effect of coupling between process parameters on composite casting and rolling was investigated based on the two-roll thin strip composite casting and rolling technology. Finite element software was used to construct the solid-liquid composite casting and rolling simulation model of copper and aluminum. Based on this model, the effects of aluminum plate exit thickness, rolling speed, melt pool height, copper strip thickness and pouring temperature on Kiss point height were investigated. The Kiss point height obtained from the orthogonal test was subjected to extreme difference analysis to get three strong coupling parameters of aluminum plate exit thickness, rolling speed and copper strip thickness, and gave the variation law of coupling strength under two coupling parameters. The coupling effect of aluminum plate exit thickness and copper strip thickness, copper strip thickness and rolling speed on Kiss point height gradually decreases with the increase of parameter value, and the coupling effect of aluminum plate exit thickness and rolling speed on Kiss point height gradually increases with the increase of parameter value. At the same time, the cause of coupling was analyzed by the physical field change of composite casting and rolling melt pool.