Abstract: The 3.2%Si oriented silicon steel after secondary cold rolling but before high-temperature annealing was pre-annealed at different temperatures in a pulsed magnetic field pre-annealing tubular furnace independently designed and developed by the laboratory. The microstructure and texture were analyzed by optical microscope and XRD, and the magnetic properties of the specimen annealed at high temperature were analyzed by using the magnetic property test system for silicon steel sheet. The results show that on the whole, the average grain size of the oriented silicon steel decreases slightly with the increase of pre-annealing temperature, and the grain size is mainly in the range of 10-25 μm. According to the analysis of ODF diagram and {200} pole figure, after pulsed magnetic field pre-annealing, the strongest texture changes from {112}<110> texture to {223}<110> texture and {111}<110> texture with the increase of pre-annealing temperature, while the magnetic properties of the high temperature annealed specimen decrease.

Key words: oriented silicon steel, pulsed magnetic field pre-annealing, texture, microstructure, magnetic properties