Oriented silicon steel with self-bonding performance and preparation method thereof

The invention provides oriented silicon steel with self-bonding performance. The oriented silicon steel comprises the following components in percentage by weight: 0.015%-0.095% of C, 2.80%-3.60% of Si, 0.020%-0.035% of Als, 0.050%-0.0100% of N, 0.010%-1.00% of Mn, and 0.0030%-0.03% of S. The preparation method comprises the following steps of casting to form a blank after smelting; performing low-temperature or high-temperature hot rolling; rolling after conventional cooling; normalizing; carrying out primary cold rolling; performing decarburizing annealing; performing nitriding treatment; coating with a high-temperature annealing isolator to remove a magnesium silicate bottom layer; performing conventional high-temperature annealing; drawing, smoothing and annealing; and coating with organic self-bonding insulated coating containing epoxy resin and mixed with a latent hardener and performing conventional drying. On the premise of ensuring that the magnetic induction intensity B800 islarger than or equal to