China Best Customized Transformer 50W800 silicon steel EI core EI-180

Cold-rolled non-oriented silicon steel sheets are hot rolled steel slabs or continuous cast slabs into coils with a thickness of about 2.3 mm. When manufacturing low-silicon products, hot-rolled coils are pickled after cold rolling to a thickness of 0.5 mm. When manufacturing high silicon products, hot-rolled strips are pickled (or normalized at 800-850 ° C and then pickled), cold-rolled to 0.55 or 0.37mm thick, and annealed in a continuous furnace of hydrogen-nitrogen mixed atmosphere at 850 ° C, and then It is cold rolled to a thickness of 0.50 or 0.35mm through a 6-10% reduction ratio. Cold rolling with this small reduction rate can increase the grain size during annealing and reduce the iron loss.

Both cold-rolled sheets were finally annealed in a continuous furnace at 850 ℃ under a 20% hydrogen-nitrogen mixed atmosphere, and then coated with phosphate and chromate insulating films. The grain-oriented silicon steel generally contains Si3%, which requires a low content of oxide inclusions in the steel, and must contain C0.03-0.05% and inhibitors (second phase dispersed particles or grain boundary segregation elements). The role of the inhibitor is to prevent primary recrystallization grain growth and promote the development of secondary recrystallization, thereby obtaining high orientation. The inhibitor itself is harmful to magnetism, so after the inhibition is completed, it must be subjected to high temperature purification and annealing. When the second phase inhibitor is used, the heating temperature of the slab must be increased to dissolve the original coarse second phase particles, and then precipitate as fine particles during hot rolling or normalization, so as to enhance the inhibition effect. The thickness of the cold-rolled finished product is 0.28, 0.30 or 0.35mm. Cold-rolled oriented thin silicon steel strip is made of 0.30 or 0.35mm thick oriented silicon steel strip, followed by pickling, cold rolling and annealing.

EI-180 silicon steel cores

EI-180 crgo transformer lamination core

EI-180 transformer ei core

EI-180 Crgo Transformer Lamination Core Images