Effect of Annealing Temperature on Microstructure and Magnetic Properties of Heatproof Grain-oriented Silicon Steel
HE Chengxu1,*, GAO Jie1, MAO Hangyin2, MA Guang1, CHEN Xin1, ZHU Zhixiang1, ZHANG Yihang2, HU Zhuochao3
1 State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102211, China 2 State Grid Zhejiang Electric Power Co., Ltd., Jinhua 310007,Zhejiang, China 3 Baosteel Central Research Institute, Shanghai 200000, China
Abstract: In this work, microstructures of two kinds of heatproof grain-oriented silicon steel were investigated by OM and EBSD technique, and the change evolution of microstructure and heatproof mechanism under different annealing temperatures were studied. The results show that small grains and ‘gap’ were formed in the strip surface by toothed roll groove method, and ‘V’ shaped groove was formed in the strip surface by laser irradiation method. The heatproof temperature of laser irradiation grain-oriented silicon steel was about 850 ℃, and the heatproof temperature of toothed roll groove grain-oriented silicon steel was about 800 ℃. The former has better heatroof. With annealing temperatures increased, the iron loss of two strips increased gradually. For toothed roll groove grain-oriented silicon steel, it's mainly due to the decrease of misorientation difference between the notch area and the Goss grains on both sides, while for laser irradiation grain-oriented silicon steel may be related to the change of Goss orientation near the groove.
何承绪, 高洁, 毛航银, 马光, 陈新, 祝志祥, 张一航, 胡卓超. 退火温度对耐热型取向硅钢组织与磁性能的影响[J]. 材料导报, 2023, 37(8): 21090231-5.
HE Chengxu, GAO Jie, MAO Hangyin, MA Guang, CHEN Xin, ZHU Zhixiang, ZHANG Yihang, HU Zhuochao. Effect of Annealing Temperature on Microstructure and Magnetic Properties of Heatproof Grain-oriented Silicon Steel. Materials Reports, 2023, 37(8): 21090231-5.
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