High-magnetic-induction grain-oriented silicon steel with excellent surface and preparation method therefor

Abstract

The disclosure relates to a high-magnetic-induction grain-oriented silicon steel with excellent surface and a preparation method therefor. The method comprises: obtaining a cold-rolled steel strip; performing a decarburization annealing and a nitriding treatment on the cold-rolled steel strip to form an oxide film on the surface of the cold-rolled steel strip; coating the cold-rolled steel strip, subjected to the decarburization annealing and nitriding treatment, with a separant, followed by drying; drying the cold-rolled steel strip coated with the separant and coating the same with an active agent, followed by coiling to obtain a steel coil, the active agent comprising a low-melting-point compound with a melting point ≤900° C.; and performing an annealing treatment on the steel coil to obtain a silicon steel.

Dependencies are inferred from the claim text.