HiB钢中高斯织构形成过程的EBSD分析

Formation of Goss texture in HiB silicon steels analyzed by EBSD technique

取向硅钢中锋锐的高斯织构是获得优异磁性能的必要条件,其形成机理受到高度关注,但一直未得到真正解决。本文利用EBSD技术分析了H iB钢热轧板及脱碳退火板中高斯取向晶粒分布的特点,讨论了其对二次再结晶织构的影响。初步结果表明,热轧板次表层中的高斯取向晶粒先是通过形变产生,然后可再结晶形成等轴的高斯取向晶粒;脱碳退火后含较少的高斯取向晶粒和高比例的{111}<11 2>取向晶粒的样品二次再结晶后高斯织构更强,强烈削弱二次再结晶后高斯织构强度的主要是{111}<1 10>取向晶粒。

Objective Sharp Goss texture is a prerequisite for excellent magnitic property of grain oriented silicon steel. Much attention is paid to its formation, which is not fully understood yet. In this paper EBSD technique is used to analyze the characteristics of the distribution of Goss - oriented grains in hot rolled and primarily recrystallized sheets. Our primary results show that Goss - oriented grains in sub - surface layer firstly formed as deformed grains and later may recrystallize and develop to equal axial grains. The primarily recrystallized sample with less Goss grains and a higher percentage of { 111 } 〈 11 2 〉 grains evolved into sharp Goss texture after secondary recrystallization. The texture component of { 111 } 〈 1 10 〉 was observed to be detrimental by decreasing the intensity of Goss texture.