期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 439, 期 -, 页码 135-143出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2017.05.022
关键词
Nb-containing grain-oriented silicon steel; Recrystallization; Microstructure; Texture; Magnetic properties
资金
- National Natural Science Foundation of China [51674123]
- Key Project of Natural Science Foundation of Hebei Province [E2017209237]
- Natural Science Foundation of Hebei Province [E2017209180, E2015209228]
- Innovation Team Leading Talent Cultivation Plan for Institutions of Higher Learning of Hebei Province [LJRC007]
- Self-financed Science and Technology Planning Project of Hebei Province [16211029]
In this study, a Nb-containing grain-oriented silicon steel was chosen to investigate the effect of different slab reheating temperatures on the microstructure and texture of primary recrystallization and secondary recrystallization by optical microscope (OM), field emission scanning electron microscope (FE-SEM) equipped with electron backscatter diffraction (EBSD) system and transmission electron microscope (TEM). The magnetic properties of finished product were also measured. The results show that Nb(C,N) can be formed and worked as the main inhibitor after adding Nb into the traditional grain-oriented silicon steel to lower the reheating temperature of the slab. At different low slab reheating temperatures, primary recrystallization takes place in all decarburized specimens, and at 1220 degrees C, the microstructure is the most fine and uniform. The types of primary recrystallization texture are consistent composed of strong {411}< 148 > texture, dominated c-fiber texture {111}< 112 > and {111}< 110 >, weak a-fiber texture and some Goss components. The proportions of HEGB and Sigma 9 boundary are the highest at 1220 degrees C after decarburization annealing, which is beneficial to the grain growth of primary recrystallization. After high temperature annealing, the specimen of 1220 degrees C slab reheating temperature can be fully recrystallized to obtain secondary recrystallization grains on the centimeter scale, and the texture component is characterized by a single Goss texture. The magnetic properties of finished product are the best, and B-800 = 1.88 T, P-1.7/50 = 1.31 W/kg. (C) 2017 Elsevier B.V. All rights reserved.
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