Materials Synthesis and Processing: Modeling and Control ofMacro-Phenomena and Micro-Structure in Steel Rolling

一个结合数值和实验研究计划将 研究热轧过程，重点是 理解热机械行为及其相关的 微观结构发展 在数值方法中， 传输和机械模型将被集成到一个 冶金或微观模型来模拟所考虑的过程。 有了这个集成模型， 可以建立工件的参数和微观结构。 在实验方法中， 轧制过程的模拟将通过热变形 试验机 温度和时间依赖的变化， 将检查变形期间和变形后的显微组织。 的 试验数据将用于确定 宏观建模和微观建模所需的材料参数， 建模 动力学理论与统计 技术将被采用，以形成控制方程的 研究微观模型。 因此，所需的边界 解这些方程的条件将由 实验数据 该实验研究还将用于 验证建模预测，以进一步完善微观和 宏观模型开发。 那么更好的控制策略 的微观结构和力学性能的发展。 进一步了解热机械和冶金 现象当然应该有利于操作过程更多 有效的成本。 这项研究也可能成为一种催化剂， 开发新的轧制技术， 应用. 这项研究可以使生产的钢型材的改进 质量更高的速度。

A combined numerical and experimental research program will be developed to study the hot rolling process with emphasis on the understanding of the thermomechanical behavior and its associated microstructure development. In the numerical approach, macro-heat transfer and mechanical models will be integrated into a metallurgical- or micro-model to simulate the process considered. With this integrated model, the relationship between the process parameters and microstructure of the workpiece can be established. In the experimental approach, the thermomechanical characteristics of the rolling process will be simulated by a hot deformation tester. The temperature and time dependent changes of microstructure during and after deformation will be examined. The testing data will be utilized to determine the flow behavior for macro-modeling and the material parameters needed in the micro- modeling. The kinetic theories associated with statistical techniques will be adopted to form the governing equations for the researched micro-models. As a result, the needed boundary conditions for solving these equations will be provided by the experimental data. The experimental study will also be used to verify the modeling predictions to further refine the micro- and macro-models developed. Then the strategy to have better control of the microstructure and mechanical properties can be developed. Further understanding of the thermomechanical and metallurgical phenomena should certainly make for operating the process more effectively cost-wise. The research may also serve as a catalyst to the development of a new rolling technology for new applications. The study may allow the production of steel shapes of improved quality at higher speeds.