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

材料合成与加工：轧钢宏观现象和微观结构的建模与控制

• 批准号: 9201831
• 负责人: Ampere Tseng
• 金额: $ 17.41万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-10-01 至 1996-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9201831&HistoricalAwards=false
• 关键词: Materials; Synthesis; Processing; Modeling; Control

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.

将开发一个数值和实验相结合的研究程序来研究热轧过程，重点是了解热轧过程的热力学行为及其相关的组织发展。在数值方法中，将宏观传热和力学模型集成到冶金-或微观模型中来模拟所考虑的过程。利用该集成模型，可以建立工艺参数与工件微观组织之间的关系。在实验方法中，将用热变形试验机模拟轧制过程的热力学特性。研究了变形过程中和变形后显微组织随温度和时间的变化。试验数据将被用来确定宏观建模的流动行为和微观建模所需的材料参数。将采用与统计技术相关的动力学理论来形成所研究的微观模型的控制方程。因此，求解这些方程所需的边界条件将由实验数据提供。实验研究还将用于验证建模预测，以进一步完善所开发的微观和宏观模型。然后才能制定出更好地控制组织和力学性能的策略。对热机械和冶金现象的进一步了解肯定有助于从成本角度更有效地操作该工艺。这项研究也可以作为催化剂，为新的应用开发一种新的轧制技术。这项研究可能允许在更高的速度下生产质量更好的型钢。