CSP流程试制高牌号无取向硅钢瓦楞缺陷的织构分析

发布时间：2018-10-30 09:22

【摘要】：研究了CSP流程生产的高牌号无取向电工钢中瓦楞缺陷的产生机理。采用EBSD技术对热轧、常化工序样品织构进行检测和分析。结果表明:热轧板织构在厚度方向上差异显著,中心层存在很强的旋转立方织构及较弱的α纤维织构和γ纤维织构,旋转立方织构是铸坯中心处原始001位向柱状晶演变得到的,它经历了小应变量及简单应变类型并绕ND轴转动,其轧制形变储能低,再结晶驱动力低,难以回复再结晶。它们是高牌号无取向电工钢中瓦楞缺陷产生的根本原因。热轧板常化后织构发生显著改变,中心层形变纤维组织消失,存在较强的旋转立方织构和{115}110织构,但旋转立方织构强度比热轧板中的织构强度已大幅减弱,因此常化工艺可有效减轻瓦楞缺陷。
[Abstract]:The mechanism of corrugated defects in high grade non-oriented electrical steel produced by CSP process was studied. The texture of hot rolling and normalizing process samples was tested and analyzed by EBSD technology. The results show that the texture of hot rolled plate is different in thickness direction, and there are strong rotating cubic texture, weak 伪 fiber texture and 纬 fiber texture in the center layer. The rotating cube texture is obtained from the original 001 position to columnar crystal evolution at the center of the billet. It goes through small strain and simple strain type and rotates around ND axis. Its rolling deformation energy storage is low, recrystallization driving force is low, and it is difficult to recover recrystallization. They are the root cause of corrugated defects in high grade non-oriented electrical steel. The texture of hot rolled plate changed significantly after normalization, and the deformed fiber structure of the center layer disappeared, and there were strong rotating cube texture and {115} 110 texture, but the strength of rotating cube texture was much weaker than that of hot rolled plate. Therefore, the normalizing process can effectively reduce the corrugated defects.
【作者单位】：先进钢铁流程及材料国家重点实验室;中国钢研科技集团连铸技术国家工程研究中心;河北工程大学装备制造学院;
【基金】：国家自然科学基金宝山钢铁股份有限公司联合资助项目(50934009)
【分类号】：TG335

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