面向硅钢高端化的织构控制研究

硅钢是贯穿电力全生命周期的战略性基础功能材料，是实施绿色发展、高效节能国家战略的重要载体。硅钢性能高端化的国际潮流势不可挡，不断追求超低铁损与高磁感的高水平匹配已成为竞争焦点。硅钢性能高端化的核心是织构控制水平的尖端化。本项目以新一代高端取向硅钢薄带和无取向硅钢板带为目标，聚焦全景描述织构演变的统计动力学，系统开展织构控制的应用基础研究。主要包括：建立以取向分辨和多参数分布耦合为特征的二次再结晶全过程统计动力学模型，突破取向硅钢薄带二次再结晶不稳定和取向漫散的关键瓶颈；建立取向分辨的形变织构、形变带与过渡带以及初次再结晶织构演变统计动力学，解析织构全流程遗传与转变信息链，破解无取向硅钢有利织构“离散性”和“低储能”的关键瓶颈。本项目的实施将推动我国抢占高端硅钢制造理论的制高点，形成新一代高端硅钢核心制造技术体系。

Silicon steels are used as elementary functional materials in various industrial fields covering the full life circle of electricity, and they become an important carrier for the strategies of energy-saving and environment-protection. Along with the irresistible tendency of developing high-end silicon steels, a global competition is emerging to continuously pursue high-level match between super low core loss and high magnetic induction. Basically, the high-end of silicon steel products lies in the level of texture control. The present project intends to conduct a comprehensive study on texture control theory for both grain-oriented silicon steel thin strips and non-oriented silicon steel sheets, with focus on the panoramic descriptions of texture evolution dynamics in a statistical sense. By taking into account orientation differentiation and multi-parameter distribution coupling, a statistical dynamic model for the whole secondary recrystallization process is to be established. It will be adopted to solve the critical bottlenecks of secondary recrystallization instability and orientation dispersion in grain-oriented silicon steel thin strips. In order to figure out the information chain of texture inheritance and microstructural evolution in non-oriented silicon steels, orientation-differentiated statistical dynamic models for deformation texture, deformation band and transition band as well as primary recrystallization texture evolution are also to be built. These models will be used to solve the critical bottlenecks of orientation divergence and low strain-stored energy for favorable texture in non-oriented silicon steel sheets. The implementation of this project will be benefit to us in terms of seizing the commanding height of manufacturing theories and the core techniques for high-end silicon steels.