Effect of annealing after strip casting on texture development in grain oriented silicon steel produced by twin roll casting
Effect of annealing after strip casting on texture development in grain oriented silicon steel produced by twin roll casting
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带材连铸后退火对双辊连铸取向硅钢织构发展的影响
DOI：
10.1016/j.matchar.2015.07.001
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发表时间：
2015-09-01
影响因子：
4.7
通讯作者：
Wang, Guo-Dong
中科院分区：
文献类型：
--
作者：
Wang, Yang;Xu, Yun-Bo;Wang, Guo-Dong
采用双辊连铸工艺生产了超低碳Fe-3%Si晶粒取向电工钢带。然后，对带或不带退火的带钢进行冷轧和退火。采用宏观/微观织构分析方法，研究了带状铸造后退火对织构发展的影响。由于快速凝固，第二相颗粒的析出行为受到抑制，铸态带材中几乎没有颗粒。直接冷轧织构的特点是强α (< 110 >//RD)和弱γ ({111}//ND)纤维。而在退火带材中，铸带材在退火过程中析出了大量的颗粒，这些颗粒阻碍了冷轧过程中晶体的旋转，使得部分初始凝固织体保留在冷轧薄板中。在直接冷轧过程中，在一次退火过程中析出发生在再结晶之前。这些细小颗粒对位错有明显的钉住作用，并进一步延缓了再结晶行为，导致初级退火片中有较强的a-纤维。另一方面，与带状退火过程中析出的细小分散的颗粒相比，初次退火过程中析出的颗粒分布不均匀。因此，在二次退火过程中没有二次再结晶，这与条带退火过程中观察到Goss晶粒的异常生长和磁性能的显著提高是不同的。(C) 2015爱思唯尔公司版权所有。
An ultra-low carbon Fe-3%Si grain oriented electrical steel strip was produced by a twin roll strip casting process. Next, the strip with or without annealing was cold rolled and subsequently annealed. The effect of annealing after strip casting on the texture development was studied using macro-/micro texture analysis. Due to the rapid solidification, the precipitation behavior of second phase particles was suppressed and very few particles were observed in the as-cast strip. The direct cold rolled texture was characterized by strong alpha (< 110 >//RD) and weak gamma ({111}//ND) fibers. While, in the annealed strip, a large number of particles were precipitated during the annealing of the cast strip and these particles hindered the crystal rotation during cold rolling such that part of the initial solidification texture remained in the cold rolled sheet. In the case of the direct cold rolling process, the precipitation occurred before recrystallization during primary annealing. These fine particles had a significant pinning effect on dislocations and further retarded the reoystallization behavior, leading to relatively strong a-fiber in the primary annealed sheet. On the other hand, compared with the fine and dispersed particles precipitated during the strip annealing process, the distribution of particles precipitated during primary annealing were inhomogeneous. Therefore, there was no secondary recrystallization during secondary annealing, which was distinct from the strip annealing process where abnormal growth of Goss grains were observed and the magnetic properties were significantly improved. (C) 2015 Elsevier Inc. All rights reserved.