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Korean Journal of Metals and Materials > Volume 56(2); 2018 > Article
Korean Journal of Metals and Materials 2018;56(2): 130-136. doi: https://doi.org/10.3365/KJMM.2018.56.2.130
Fe-3.2 wt% Si 방향성 전기강판에서 냉간압연 횟수가 집합조직과 {110}<001> Goss 결정립 형성에 미치는 영향
전성호, 박노진
금오공과대학교 신소재공학과
Effect of the Number of Cold Rolling Passes on the Formation of {110}<001> Goss-Oriented Grains in Fe-3.2 wt% Si Electrical Steel
Soeng-Ho Jeon, No-Jin Park
Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
Correspondence  No-Jin Park ,Tel: +82-54-478-7736, Email: njpark@kumoh.ac.kr
Received: 24 August 2017;  Accepted: 8 December 2017.  Published online: 5 February 2018.
ABSTRACT
An excellent grain-oriented electrical steel is composed of grains with exact Goss orientation. In order to produce this, it is important to control the Goss-oriented grains during the cold-rolling process. In this study, textures measured by X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) were analyzed for 1, 10, and 36-pass cold-rolled sheets at a constant total thickness reduction rate of 89% in Fe3.2 wt% Si grain-oriented electrical steel. After cold rolling, strong α-fiber textures and relatively weak γ-fiber textures were developed in all specimens, regardless of the number of rolling passes. On the surface of the 36-pass rolled specimen, a weak α-fiber texture and a relatively strong η-fiber texture developed compared with the other specimens. The Goss-oriented grains were mainly found in the shear band or micro band, which show that their fraction increases as the number of rolling passes increases, especially within the surface layer. As the number of Goss-oriented grains increased, the exactness of their orientation improved. It was determined that it is possible to obtain a grain-oriented electrical steel with a high-quality Goss orientation using a process such as subsequent recrystallization.
Keywords: electrical materials, cold-rolling, EBSD, texture
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