High-magnetic-induction low-temperature oriented silicon steel and production method thereof

The invention discloses a production method of high-magnetic-induction low-temperature oriented silicon steel, which comprises the following steps: by optimizing a nitriding process, dividing gas nitriding adopted between decarburization annealing and high-temperature annealing of a steel strip obtained by cold rolling into three stages: in the first stage, the temperature is controlled at 600-700 DEG C, the nitriding time is 5-10 seconds, the introduction flow of NH3 is 4-10m < 3 >/h, and the dew point in a furnace is 40-60 DEG C; in the second stage, the temperature is controlled to be 750-840 DEG C, NH3 is not introduced, the time is 20-40 seconds, and the dew point in the furnace is-20-0 DEG C; in the third stage, the temperature is controlled to be 850-1000 DEG C, the time is 10-30 seconds, the introduction flow of NH3 is 10-25 m < 3 >/h, and the dew point in the furnace is controlled to be 20-40 DEG C; the three stages are all carried out in protective gas of H2 + N2. According to ...