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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Effect of annealing parameter on microstructure and
magnetic properties of cold rolled non-oriented electrical steel
LI Min(李  敏)1, XIAO Yu-de(肖于德)1, WANG Wei(王  伟)1, ZHOU Juan(周  娟)1,
WU Guang-liang(吴光亮)2, PENG Yue-ming(彭跃明)

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Hunan Valin Lianyuan Iron and Steel Company, Loudi 417722, China

Abstract:The microstructure and magnetic properties of cold rolled non-oriented electrical steel, annealed at 200−1 000 ℃ for 0−240 min with different heating rates, were investigated by optical microscopy, scanning electron microscopy, Epstein frame, and transmission electron microscopy. The results show that the magnetic properties of cold rolled non-oriented electrical steel can be improved by controlling the annealing process to obtain uniform coarse grains with critical sizes after the recovery, recrystallization and growth of grains. Additionally, the annealing temperature influences the magnetic properties more significantly than annealing time, and with the increase of heating-up rate during the annealing process, the magnetic properties of the cold rolled non-oriented electrical steel increase.

 

Key words: non-oriented electrical steel; annealing process; magnetic property

ISSN 1672-7029
CN 43-1423/U

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