Table of Contents
Textures and Microstructures
Volume 14–18
http://dx.doi.org/10.1155/TSM.14-18.799

Influence of Subsurface Layers on Goss-Texture Development in Secondary Recrystallization of RGO Electrical Steel Sheet

1Thyssen Stahl AG, D-4100 Duisburg 11, Germany
2Institut für Metallkunde und Metallphysik der RTHW Aachen, D-5100 Aachen, Germany

Copyright © 1991 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Regular grain oriented (RGO) electrical steel sheet used for power transformer cores is produced by a two stage cold rolling process with intermediate annealing and a subsequent decarburizing primary recrystallization. Its beneficial magnetic properties originate from a sharp Goss-texture developed by the following secondary recrystallization. By controlled thinning of the material the sharpness of this Goss-texture will be shown to strongly depend on texture and structure of the subsurface layers of the sheet. A less intense secondary recrystallization with deteriorated Goss-texture sharpness and magnetic properties was found if a critical surface layer was removed from both sides of the sheet at any processing step, but no such effect occurred after single-sided surface removal. This result led to a new interpretation of the model of "texture inheritance".