Effect of Stress Relief Annealing Process on Microstructure and Magnetic Properties of Semi-processed Electrical Steel

Résumé fourni par la source

In order to improve magnetic properties of products of semi-process electrical steel,effect of stress relief annealing process on the magnetic properties and microstructure of semi-processed electrical steel was investigated with NIM2000E electrical steel exchange magnetic measurement system and circle measurement method.Results show that when the steel is annealed at 760~790 ℃ for 2 h,the microstructure is coarse homogeneous equiaxed ferrite,and the bimodal grain size is about 200 μm,the iron loss P1.5/50 is less than 3.5 W/kg,magnetic induction B50 is higher than1.70 T,and the corresponding magnetic conductance μ1.0is higher than 12.57 mH/m.

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