Production of thin hot strips of high silicon bearing FeSi-strip using the integrated technology of thin slab casting and hot rolling

采用薄板坯连铸热轧一体化技术生产高硅硅铁薄带材

• 批准号: 255681924
• 负责人: Professor Dr.-Ing. Rudolf Kawalla
• 金额: --
• 依托单位: Institut für Metallformung
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/255681924?language=en
• 关键词: Production; thin; hot; strips; silicon

Within the first phase of the project, various hot rolling strategies weredeveloped for the production of a thin, 1 mm thick hot strip of the Fe-2,4 wt.-% Si alloy using the conventional hot rolling process withprevious reheating and the integrated thin slab casting technology.The interactions of the individual process steps and the influence ofthe hot strip on the magnetic properties could be demonstrated. Withboth methods of hot strip production, it is possible to roll different hotstrip structures and textures for hot strip thicknesses between 1 mmand 2.5 mm. The hot strip states like hardened, partially softened andsoftened could be realised. Significant differences in texture withmagnetically advantageous and unfavorable textures were foundacross the strip thickness. The hot rolling process was investigatedexperimentally and simulatively. For this purpose, the hardening andsoftening behavior was investigated experimentally and simulativelydescribed by semi-empirically and physically based models. For aholistic view of the production of non-grain-oriented electrical sheetsand of the continuous process modeling, the modeling of the materialflow and the microstructural development after hot forming is anessential component with the layer model developed at the IMF as thebasis. The influence of the hot strip on the structure of the finalannealed samples and on the magnetic properties was also analyzed.In the second phase, the simulation of the hot rolling process and themicrostructure development during hot rolling as well as theexperimental work will be continued. Aim is to define hot stripstructures for specific applications with defined magnetic properties,to produce them in a targeted manner and to derive applicationorientedhot rolling strategies. Therefore, in cooperation with the othersubprojects of the research group, using an alloy with a high Sicontent (2.8 wt.% Si) is planed. This makes it possible to investigatethe influence of the alloy on the production process, especially hotrolling, the material behavior during hot forming and the effects on themagnetic properties. Based on the findings of the first phase of theproject, a thin hot strip is produced with a favorable initial state for thecold rolling and for the magnetic properties by means of adaptationsof the rolling strategies, whereby the intended hot strip annealingoffers further possibilities of the microstructure setting. The alteredhardening and softening behavior of the alloy with high Si content willbe also taken into account. The submodels of the individual processstages are linked to one another in cooperation with the projectpartners with the aim of experimentally imaging the theoreticallyderived process parameters and producing a non-grain-orientedelectrical sheet adapted to the defined requirements of thedemonstrator.

在项目的第一阶段中，使用常规的热滚动过程进行了较薄的薄热滚动策略，以生产薄的1毫米厚的热条。-％si合金，并使用传统的热滚动工艺进行了预防的重新加热和集成的薄板铸造技术。单个过程步骤和单个过程步骤的相互作用以及热带对磁性物业的影响。借助热带生产方法，可以滚动不同的热条结构和纹理，以在1 mmand 2.5 mm之间进行热条厚度。可以实现热条状态，例如硬化，部分软化并施加了损坏。在带有优势和不利的质地上，质地上的质地有显着差异，发现了条状厚度。热滚动过程进行了表面和模拟的研究。为此，通过半验证和基于物理的模型对实验和模拟描述了实验和模拟描述的硬化行为。为了观察连续过程建模的非颗粒导向的电表和非颗粒导向的电表，在热形成后，材料流的建模和微观结构开发是无用的成分，其层模型在IMF上作为thebasis开发。还分析了热条对最终生存样品和磁性特性结构的影响。在第二阶段，将继续进行热滚动过程和热滚动过程中的主题开发以及实验性工作。目的是为具有定义的磁性特性的特定应用定义热条纹结构，以目标方式生产它们并得出Application -orightEdhot滚动策略。因此，计划与研究小组的其他逐步专门合作，使用具有较高晶状体的合金（2.8wt。％Si）。这使得可以研究合金对生产过程的影响，尤其是热卷，热形成过程中的材料行为以及对磁性特性的影响。根据该项目的第一阶段的发现，通过适应滚动策略的调整，产生了薄热条，具有良好的初始状态和磁性性能，从而进一步的热条退火剂的可能性进一步的微结构设置。还要考虑具有高Si含量的合金的改变和软化行为。各个过程阶段的子模型与项目派代表合作相互关联，目的是实验成像理论上的过程参数，并产生不适合特定要求的特定要求。