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Improvement of RGO ‐ electrical steel by modified intermediate annealing
Author(s) -
Böttcher Andreas,
Bölling Fritz,
Lücke Kurt
Publication year - 1994
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199400931
Subject(s) - recrystallization (geology) , carbide , annealing (glass) , metallurgy , materials science , chemistry , paleontology , biology
A modified intermediate annealing process, as described, results in an improvement of the magnetic properties of RGO (regular grain oriented) electrical steel. Carbon has a key role in its mechanism. Several analytical methods have been applied to distinguish between standard and modified processing, leading to major differences at the carbide dispersion and the decarburized sheets texture. The carbides are dispersed along the grain boundaries, but much more finely after modified processing. The Goss intensity of the decarburized sheets texture is significantly enhanced after modified processing. The mechanism affects the selection process during the evaluation of the recrystallization texture. The finer dispersion of the carbides results in a higher amount of carbon in solution during heating up which coincides with the selection process of the growing recrystallization nuclei. This is attributed to a major recrystallization texture determining factor. The higher Goss intensity in the material before secondary recrystallization annealing optimizes the ability for a strong selection in favour of a strong final Goss texture.