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The effects of grain size on the magnetic properties of nonoriented electrical steel sheets

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Journal of Materials Engineering

Abstract

The effects of grain size on magnetic properties of nonoriented electrical steel sheets were investigated at the commercial power of frequency (50 Hz). The permeability, magnetic induction, and core loss of test specimens were optimal at their intermediate grain sizes. (LC) core loss W15/50 of Epstein specimens was minimum at a grain diameter of approximately 150 μm, regardless of the silicon content. A study of the relationship between magnetic properties and grain size of ring specimens showed that core loss, magnetic induction, and ac permeability were optimal at larger grain diameters in a weak magnetic field and at smaller grain diameters in a strong magnetic field. It was found that magnetic induction and ac permeability tended to improve at large grain diameters in the irreversible magnetization range and at small grain diameters in the rotation magnetization range.

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Authors and Affiliations

  1. Hirohata R&D Laboratories, Hirohata Works, Nippon Steel Corporation, Hirohata-Ku, Himeji City, Japan

    M. Shiozaki & Y. Kurosaki

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  1. M. Shiozaki
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  2. Y. Kurosaki
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Shiozaki, M., Kurosaki, Y. The effects of grain size on the magnetic properties of nonoriented electrical steel sheets. J. Materials Engineering 11, 37–43 (1989). https://doi.org/10.1007/BF02833752

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