Abstract：The magnetic properties and microstructure of the experimental steel after cyclic at the stress of 370 MPa and 400MP were investigated. The results show that the magnetic induction intensity decreases significantly and the iron loss increases with the increasing of the cycles of 5×103 under different cyclic stresses. The magnetic induction intensity and iron loss are not changing largely with the increasing cycle period. The magnetic induction intensity decreases and iron loss increases significantly with increasing the cyclic stress. The volume fraction of {001} surface fabric decreased and the volume fraction of {111} surface fabric increased with the increasing of cyclic times, the magnetic domain structure changes from 180° parallel domain to curved domain and labyrinth domain, and the dislocation density increases which leads to the magnetic induction intensity decreases and the iron loss increases.
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2021, Vol. 28 