日本金属学会誌

J. Japan Inst. Metals, Vol. 55, No. 11 (1991),
pp. 1274-1281

Effect of Sn Addition on Secondary Recrystallization of 3.8 mass%Si Grain-Oriented Electrical Steel

Shozaburo Nakashima1, Kunihide Takashima1, Jirou Harase1 and Katsuro Kuroki1

R & D Laboratories III, Nippon Steel Corporation, Kitakyushu. Present address: Electromagnetic Materials, Steel Research Laboratories, Nippon Steel Corporation, Futtsu

Abstract:

A study was made on the effect of Sn addition on the secondary recrystallization of 3.8 mass%Si grain-oriented electrical steel.
(1) With increasing Si content (3.0→3.7 mass%), secondary recrystallization is suppressed. This is attributed to the large size of primary-recrystallized grains, the small amount of Goss nuclei in the primary-recrystallized matrix and the less effective inhibitors for secondary recrystallization in the steel with a high content of Si.
(2) Upon Sn addition to the steel with a high content of Si (3.8 mass%), secondary recrystallization occurs with a highly oriented Goss texture, which results in excellent magnetic properties. Sn addition is considered to eliminate urfavorable factors for secondary recrystallization caused by the increased Si content mentioned above.


(Received 1991/5/11)

Keywords:

single-stage cold rolling process, electrical steel, grain-oriented elecrical steel, secondary recrystallization, magnetic property, tin


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