EFFECT OF THICKNESS ON SECONDARY RECRYSTALLIZATION OF FE-3-PERCENT-SI

A study was made on the effect of the final thickness (0.60-0.18 mm) on the secondary recrystallization of Fe-3%Si using MnS and AIN as inhibitors. When heated in hydrogen during final annealing, the 0.60 mm thick specimen underwent a complete secondary recrystallization, but the 0.36 mm and thinner specimens did an incomplete secondary recrystallization. When heated in a mixture gas of hydrogen and nitrogen during final annealing, all specimens underwent a complete secondary recrystallization, but the thinner the specimen, the lower the magnetic flux densities were. The reduction of final thickness makes the specimen too sensitive to the atmosphere during final annealing to get a precisely Goss-oriented secondary-recrystallized texture.