Effect of Sn on HighPermeability Grain-Oriented Silicon Steel

The effect of Sn on highpermeability grain-oriented silicon steel was studied by PHI-700 Auger electron spectroscopy (AES), JEM-2100 transmission electron microscopy (TEM) and electron back-scattered diffraction (EBSD) technology. The results show that (1) the magnetic properties could be significantly increased by adding Sn; (2) the primary grain size becomes smaller with the addition of 0.19 wt% Sn and the Goss orientation crystal nucleus become more numerous as well; (3) the grain boundary segregation of Sn is still obvious at 970 A degrees C in hightemperature annealing process; and (4) the average size of precipitates becomes smaller with the addition of 0.19 wt% Sn; meanwhile the dispersion and the inhibitor are also promoted. These conclusions are in agreement with the experimental results.