Macro- and micro-segregation formed upon twin-roll casting (TRC) can be inherited from sub-rapid solidification to solid-state transformation, even to plastic deformation, thus deteriorating drastically mechanical properties of as-produced thin sheets. Although many works focusing mainly on controlling fields of thermal, concentration and convection have been reported, how to control artificially and quantitatively the segregation using a theoretical connection between processing parameters and solidification models, has not been realized, yet. Regarding it, a systematical framework integrating non-equilibrium dendritic growth and overall solidification kinetics with the TRC parameters, was constructed applying a generalized stability (GS) conception deduced from transient thermodynamic driving force $\Delta G^{\mathrm{t}}$ and transient kinetic energy barrier $Q_{\text{eff}}^{\mathrm{t}}$ evolving upon solidification. Departing from this framework considering synergy of thermodynamics and kinetics (i.e., thermo-kinetic synergy), a criterion of high $\Delta G^{\mathrm{t}}$-high GS guaranteed that the macro (i.e., the centerline) and the micro (i.e., the edge) segregation can be suppressed by increasing $\Delta G^{\mathrm{t}}$ and GS at the beginning and the ending stage of sub-rapid solidification, respectively. This typical thermo-kinetic combination producing the microstructure can be inherited into the plastic deformation, as reflected by corresponding strength-ductility combinations. This work realized quantitative controlling of TRC by a theoretical connection between processing parameters and solidification models, where, an optimization for sub-rapid solidification segregation using the GS conception including $\Delta G^{\mathrm{t}}$ and $Q_{\text{eff}}^{\mathrm{t}}$ has been performed.

双辊铸造（TRC）形成的宏观和微观偏析可以从亚快速凝固到固态转变，甚至到塑性变形，从而大大降低所生产的薄板的机械性能。尽管已经报道了许多主要集中在控制热、浓度和对流领域的工作，但尚未实现如何利用工艺参数和凝固模型之间的理论联系来人为地和定量地控制偏析。关于它，应用从瞬态热力学驱动力推导出的广义稳定性（GS）概念，构建了一个将非平衡枝晶生长和整体凝固动力学与 TRC 参数相结合的系统框架$\Delta G^{\mathrm{吨}}$和瞬态动能势垒${问}_{\text{效果}}^{\mathrm{吨}}$固化后进化。从这个框架出发，考虑热力学和动力学的协同作用（即热动力学协同作用），一个高标准$\Delta G^{\mathrm{吨}}$-高 GS 保证宏观（即中心线）和微观（即边缘）偏析可以通过增加来抑制$\Delta G^{\mathrm{吨}}$和 GS 分别在亚快速凝固的开始和结束阶段。这种产生微观结构的典型热动力学组合可以继承到塑性变形中，这反映在相应的强度-延展性组合中。本工作通过工艺参数和凝固模型之间的理论联系实现了对 TRC 的定量控制，其中，使用 GS 概念对亚快速凝固偏析进行优化，包括$\Delta G^{\mathrm{吨}}$和${问}_{\text{效果}}^{\mathrm{吨}}$已执行。