取向电工钢Goss取向晶粒的初始来源  

The initial source of Goss oriented grains in oriented electrical steels

作　　者：毛卫民 李一鸣[1] 金自力 任慧平[1] MAO Weimin;LI Yiming;JIN Zili;REN Huiping(School of Materials Science and Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China;School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]内蒙古科技大学材料科学与工程学院,内蒙古包头014010 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《内蒙古科技大学学报》2025年第1期1-7,34,共8页Journal of Inner Mongolia University of Science and Technology

基　　金：国家自然科学基金(51761033)。

摘　　要：Goss晶粒的初始来源是取向电工钢最终获得强Goss织构的关键之一。以实验观察热轧板组织和织构为依据,借助塑性变形反应应力理论,在不同的外应力、滑移系、反应应力条件下计算了取向电工钢热轧织构的形成。结果显示,{112}面滑移系开动时难以形成轧制Goss织构。在外来大剪切应力和相应强晶粒间交互作用下仅以{110}面滑移系独立开动,钢板表层可以形成一定Goss织构。分析认为,最高原子密度{110}面的八面体间隙密度最高,致其比{112}面和{123}面的临界分切应力低而加工硬化率高。低温变形时开动的{112}和{123}面滑移实际上是不同{110}滑移以固定的或特定的比例、小步长、规律性地反复组合开动。热轧的高温热激活明显消除了加工硬化效应,热轧的大道次压下量引起了附加剪切应力,这不仅使{110}滑移的独立开动成为了塑性变形的主要机制,且在热轧板表层形成了初始的Goss织构。The initial source of Goss grains is one of the key factors for finally obtaining strong Goss texture in grain oriented electrical steels.Based on experimental observation of the microstructure and texture of hot band,and using the reaction stress theory for plastic deformation,the formation of hot rolling texture in grain oriented electrical steels was calculated under different external stresses,slip systems,and reaction stress conditions.The results show that it is difficult to form rolling Goss texture when the{112}slip systems are activated.Under large external shear stress and corresponding strong intergranular interactions,a certain Goss texture can be formed on the surface layer of the steel band when only the{110}slip systems operate independently.The analysis suggests that the octahedral interstitial site density is highest on the{110}plane with the highest atom density,resulting in lower critical shear stress and higher work hardening rate than those on the{112}and{123}planes.The slips initiated on{112}and{123}planes during low temperature deformation are actually combined slip movements conducted by different{110}slips that are repeatedly,in small steps in mutually fixed or specific ratio under certain regularity.The high temperature thermal activation of hot rolling significantly eliminates the work hardening effect and the large pass reduction of hot rolling causes additional shear stress,which not only makes the independent activation of{110}slips the main mechanism of plastic deformation,but also forms the initial Goss texture on the surface layer of the hot band.

关 键 词：取向电工钢 Goss取向 热轧变形 织构 

分 类 号：TG142.1[一般工业技术—材料科学与工程]