The magnetic susceptibility strength increases with the permeability of the material under certain magnetic field strength, and the iron loss mainly depends on the hysteresis loss and the eddy current loss. The chemical composition of silicon can improve the resistivity of steel and significantly reduce the eddy current loss, can reduce the magnetic anisotropy of the crystal, easy magnetization, but also can reduce or close the γ-phase region, in favor of high temperature annealing grain growth.
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