Characteristics of EI oriented silicon steel
The EI oriented silicon steel has a crystal face parallel to the plane of the steel strip, and the axis of easy magnetization is parallel to the rolling direction. EI oriented silicon steel has a silicon content of about 3% and requires a low oxide inclusion content in the steel and must contain some inhibitor (MnS, A1N). The magnetic properties of EI oriented silicon steel have strong directionality, the lowest iron loss value in the rolling direction, the highest magnetic permeability and a high magnetic induction value under a certain magnetization field.
Development status of EI oriented silicon steel
The most widely used EI oriented silicon steel is supplied in the form of a coil, and its surface is coated with an insulating layer, thereby generating tensile stress in the base steel strip, thereby further reducing the iron loss value. The cold rolled strip has a smooth surface with good sheeting properties and a high core fill factor.
Method for preparing EI oriented silicon steel
The EI oriented silicon steel is smelted by an oxygen converter, and the slab is subjected to hot rolling, normalization, cold rolling, intermediate annealing and secondary cold rolling to a finished thickness, and then subjected to decarburization annealing and high temperature annealing, and finally coated with an insulating layer.