Grain boundary and texture evolution of a high magnetic grain-oriented silicon steel during rolling and heat treatment

doi:10.13251/j.issn.0254-6051.2021.12.033

Abstract

Abstract: Coincident site lattice (CSL) boundary and texture of a high magnetic grain-oriented silicon steel in different rolled and heat treatment states were studied by means of electron backscatter diffraction (EBSD). The results show that the cross-section texture of hot-rolled oriented silicon steel is distributed in layers, the surface layer of which is mainly {110}<001> Goss texture, and the quarter of the thickness is mainly {001}<110> cubic texture, {112}<111> copper type texture and {110}<001> Goss texture, while the core forms strong {112}<111> copper type texture, {111}<110> deformation texture and {110}<001> Goss texture. After normalizing, the cross-sectional texture gradient is not obviously changed, but the {112}<111> texture at the center position changes to {110}<001> Goss texture. The texture components are {110}<001> Goss texture, {112}<111> texture and {111}<110> deformation texture in the cold rolled and annealed state steel. After secondary recrystallization, a strong {110}<001> Goss texture is produced. With the change of texture, the CSL grain boundary undergoes a significant transformation. ∑3-∑29 appear in the CSL boundaries in the hot-rolled state, with low proportions. The proportion of CSL grain boundary increases after normalizing. The proportion of CSL boundary increases greatly in the cold rolled and annealed state, especially ∑3, ∑7, ∑9 and ∑15 boundaries. Due to the transformation of CSL boundaries, the type of CSL boundary reduces during second recrystallization, while the proportions of ∑3, ∑13 and other grain boundaries increase, but the ∑9 grain boundary disappears.

Key words: high magnetic grain-oriented silicon steel, Goss texture, CSL boundary, secondary recrystallization

CLC Number:

TG142.1

Yu Chunming, Zhang Jiming, Dang Bo, Zhang Yi. Grain boundary and texture evolution of a high magnetic grain-oriented silicon steel during rolling and heat treatment[J]. Heat Treatment of Metals, 2021, 46(12): 204-208.

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