GRAIN BOUNDARY SEGREGATION OF TRACE Sn IN A HIGH INDUCTION ORIENTED SILICON STEEL

When Sn segregated at grain boundaries of high induction oriented silicon steel,no remarka-ble interaction between Sn and other elements was observed.At the starting temperature ofsecondary recrystallization,950℃,a certain Sn still segregates at grain boundaries.Sn seemsto act as a supplemental inhibitor through grain boundary segregation.According to theoreti-cal analysis,an addition of Sn may decrease the secondary recrystallization temperature ofhigh induction oriented silicon steel,and it is in agreement with the experimental result.