Influence of Low Temperature Heat Treatment on Iron Loss Behaviors of 6.5 wt% Grain-oriented Silicon Steels

In this study, the influence of low temperature heat treatment on iron loss behaviors has been investigated in 6.5 wt% grain-oriented silicon steels fabricated by a SiO2 textile method. Heat-treatment under hydrogen atmosphere was carried out for 1 hr in the temperature range of 500 to 800°C. As a r...

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Bibliographic Details
Published in:ISIJ International 2012, Vol.52(3), pp.530-534
Main Authors: Jung, Heejong, Na, Manho, Soh, Joon-Young, Kim, Sang-Beom, Kim, Jongryoul
Format: Article
Language:English
Subjects:
6.5 wt% silicon steel
Applied sciences
B2 and D03 antiphase boundaries
Exact sciences and technology
grain-oriented silicon steel
low temperature heat treatment
Metals. Metallurgy
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Summary:In this study, the influence of low temperature heat treatment on iron loss behaviors has been investigated in 6.5 wt% grain-oriented silicon steels fabricated by a SiO2 textile method. Heat-treatment under hydrogen atmosphere was carried out for 1 hr in the temperature range of 500 to 800°C. As a result, the minimum iron loss was obtained in a sample annealed at 600°C. Transmission electron microscopy analysis showed that B2 and D03 antiphase domains existed in all heat-treated samples but D03 size was maximized after 600°C heat-treatment. In addition, magnetic domains cut through these antiphase boundaries. Therefore, the low iron loss of the sample annealed at 600°C should be ascribed to the reduction in the area of the antiphase boundaries which acted as pinning centers in the magnetic domain walls.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.52.530