IF钢中非金属夹杂物三维特征的解析与控制基础研究

IF钢被广泛应用于家电、汽车等行业，是高品质钢的典型代表。用作汽车外板的O5板要求表面无任何缺陷，对夹杂物控制提出更高的要求。有效控制夹杂物对带钢表面造成缺陷的影响，需要克服以下瓶颈问题：①对于夹杂物形态特征的准确表征和判别；②铸态下夹杂物特征轧制过程中的遗传。针对以上问题，本课题拟采用夹杂物原貌分析技术揭示IF钢中非金属夹杂物三维特征，定量化解析不同三维特征非金属夹杂物的形成条件。在明确不同特征夹杂物形成条件的基础上，采用纳米压痕分析、Ansys模拟和铸轧过程的超声波检测来跟踪铸态下不同三维特征非金属夹杂物在轧制过程中的遗传演变规律。最终为实现高品质IF钢中非金属夹杂物控制提供指导。

Iterstitial free steel (IF) was widely used in home appliances, automotive industry; and also was a typical of high-qulity steel. Automotive outer panel just as O5 plate required no surface defects. So there were strict requirements for inclusions control. Avoid the strip surface defects due to inclusions, following bottlenecks problems needed to be resolved. First problem is how to distinguish the morphologies of inclusions accurately; second problem is genetic characteristic of inclusions from slab to strip during the rolling process. Based on above issues, this project intends to reveal the three-dimensional characteristics of non-metallic inclusions in IF steel by original morphology analysis technology and resolved the formation condition of different kinds of inclusions quantitatively; and then, follow the genetic and evolution of non-metallic inclusions in slab during rolling process. Provide the guidance for the inclusions control of IF steel.