EI core three-phase lamination is an electrical silicon steel with silicon content as high as 0.8%-4.8%. It is hot and cold rolled and has excellent electromagnetic properties. It is an indispensable important magnetic material in the power, telecommunications and instrumentation industries. According to its silicon content, it can be divided into low silicon and high silicon. According to the production process, it can be divided into two types: hot rolling and cold rolling. Cold rolling can be divided into two types: no orientation and grain orientation.
Normally, the EI core three-phase laminate was annealed at 730, 780, and 830 ° C, respectively, to study the effect of annealing temperature on the mechanical properties and microstructure of the EI core three-phase laminate. The microstructure and mechanical properties of EI core three-phase laminate, the yield strength and yield elongation, were compared and analyzed by metallographic analysis and room temperature tensile test.
The results show that after annealing, the EI core three-phase lamination undergoes recrystallization and grain growth, and the annealing temperature has no effect on the yield elongation; the higher the annealing temperature, the coarser the grain, the smaller the yield strength; the one cold-rolled EI core The three-phase lamination is superior to the secondary cold-rolled EI core three-phase lamination, and the recrystallization annealing temperature is suitably 780 ° C.