|
|
|
| Effect of Ball Scribing on Magnetic Shielding Efficiency of Grain-oriented Silicon Steel |
| Hao WANG1,Chang-sheng LI1,Rui-bin MEI2,Gang HUO3 |
1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China
2. Northeastern University at Qinhuangdao Branch, Northeastern University, Qinhuangdao 066004, Hebei, China
3. Benxi Steel Posco Cold Strip Rolling Co., Ltd., Benxi 117021, Liaoning, China |
|
|
|
|
Abstract Magnetic shielding of grain-oriented silicon steel was investigated. Ball scribing with spacing of 2 to 16 mm was performed at peak flux densities of 8.0 mT to 1.3 T. Magnetic shielding efficiency was calculated, including absorption, reflection and inner multi-reflection shielding efficiencies. Magnetic shielding efficiency (MSE) increase ratios after different scribing spacing were compared, and thickness requirement to achieve absorption shielding of 50 dB was also calculated. The results show that magnetic shielding efficiencies of C711 and H668 silicon steels increase by 4.79 and 3.15 dB respectively after scribing of 16 mm. Before scribing, shielding efficiency of H668 steel was higher than that of C711 steel, while after scribing, both absorption and shielding efficiency gaps were largely abridged between C711 and H668 steels. Plate thickness of C711 steel could be reduced from 3.18 mm without scribing to 2.20 mm after scribing of 16 mm. There is no apparent thickness reduction at lower flux densities; while the peak flux density is above 0.3 T, the shielding effect becomes apparent, and the thickness could be reduced from 2.28 mm without scribing to 1.70 mm with scribing spacing of 16 mm. Magnetizing process and its effect on variation of magnetic shielding were also analyzed.
|
|
Received: 07 June 2013
Published: 08 July 2014
|
| Fund:National Outstanding Youth Science Foundation of China;National Outstanding Youth Science Foundation of China;National Outstanding Youth Science Foundation of China |
|
Corresponding Authors:
Chang-sheng LI
E-mail: lics@ral.neu.edu.cn
|
|
|
|
| [1] |
Si-qian Bao,,*,Yang Xu,Gang Zhao,,Xiang-bin Huang,Huan Xiao,Chuan-long Ye, Na-na Song,Qing-ming Chang. Microstructure, texture and precipitates of grain-oriented silicon steel produced by thin slab casting and rolling process[J]. Chinese Journal of Iron and Steel, 2017, 24(1): 91-96. |
| [2] |
Bing FU,,Hai-jun WANG,Jian-xin YAN,,Li XIANG,Sheng-tao QIU,Guo-guang CHENG. Effects of Temperature and Alloying Elements on �� Phase Fraction of Grain-oriented Silicon Steel[J]. Chinese Journal of Iron and Steel, 2016, 23(6): 573-579. |
| [3] |
Gong-tao LIU,Zhi-qiao LIU,Ping YANG,Wei-min MAO. Correlation between Primary and Secondary Recrystallization Texture Components in Low-temperature Reheated Grain-oriented Silicon Steel[J]. Chinese Journal of Iron and Steel, 2016, 23(11): 1234-1242. |
| [4] |
Chen LING,Li XIANG,Sheng-tao QIU,Yong GAN. Effects of Normalizing Annealing on Grain-oriented Silicon Steel[J]. Chinese Journal of Iron and Steel, 2014, 21(7): 690-694. |
| [5] |
FU Yong-jun,,JIANG Qi-wu,WANG Bao-chuan,YANG Ping,JIN Wen-xu. Morphologies and Influential Factors of Forsterite Film in Grain-Oriented Silicon Steel[J]. Chinese Journal of Iron and Steel, 2013, 20(11): 105-110. |
|
|
|
|
2014, Vol. 21 
