Acta Metallurgica Sinica (English Letters)

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Effect of Ball Scribing on Relative Permeability of Grain-oriented Electrical Steel

Hao WANG1,2), Changsheng LI1), Tao ZHU1), Nkwachukwu Chukwuchekwa2), Ban CAI1),Gang HUO1,3)   

  1. 1)State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
    2)Wolfson Centre for Magnetics, Cardiff University, Cardiff CF24 3AA, UK
    3) Pohang Cold Strip Rolling Co. Ltd of Bensteel, Benxi 117021, China
  • Received:2013-01-15 Revised:2013-05-03 Online:2013-10-25 Published:2013-09-13
  • Contact: Changsheng LI
  • Supported by:

    National Natural Science Foundation of China (Nos. 51174057 and 51274062) and the National High Technology Research and Development Program (No. 2012AA03A503).

Abstract:

Effect of ball scribing on relative permeability of conventional grain-oriented (CGO) and high permeability grain-oriented (HGO) electrical steel was investigated. The samples were scribed with spacing of 2 mm, 4 mm, 8 mm and 16 mm. The results show that after ball scribing with 16 mm width at 1.0 T, relative permeability of both CGO and HGO steels was increased by 109% and 80%, respectively. Relative permeability rises as the scribing space increases, with the movement of the peak value of relative permeability to a higher flux density. Relational models describing relative permeability and flux density were constructed with high accuracy based on experimental data. The experimental data curves were analyzed during the magnetizing process.

Key words: Ball scribing, Grain-oriented electrical steel, Relative Permeability, Relational modeling