High quality of the strip profile of electrical steel is demanded. Large wedge of non-orientation electrical steel strip in hot rolling process have brought serious difficulties to the cold rolling and other subsequent processes, and has become an important factor restricting the quality of electrical steel products. The strip wedge of electrical steel was analyzed by means of the measurement statistics of the strip profile of the intermediate slab, the observation of infrared thermography and the measurement of the worn rolls, etc. Then the effects of inlet wedge, uneven wear of rolls, inhomogeneous temperature distribution of the plate in mono-phase region and double-phase region on the wedge after rolling were investigated by a finite element (FE) model based on the actual material model of electrical steel. The calculation results indicated that the wedge existed in the slab can be decreased but it was difficult to be eliminated during afterwards rolling. The effect of work roll slant wear on the wedge was greater than that of backup roll. The slant distribution of transverse temperature had a leading effect on the strip wedge, and the smaller transverse temperature difference could cause the huge wedge. Especially, the wedge generated in double-phase region was larger than that in single-phase region with the same temperature difference. Based on the above investigations, the control measures were put forward to reduce the strip wedge and their effects were analyzed.
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