窒化したFe-3%Si合金の2次再結晶に伴う磁束密度の変化

Abstract

87.4% cold rolled and primary recrystallized Fe-3%Si specimens containing Al were nitrided after primary recrystallization. They were then annealed intermittently with the heating rate of 15°C/hr in a infrared radiation furnace in 100%N2 atmosphere. Magnetic induction B8 were measured after each annealing. The onset of secondary recrystallization was detected by the rapid rise of B8 value. The secondary recrystallization temperatures were higher when the initial grain sizes were larger or the nitrogen contents after nitriding treatment were higher. The secondary recrystallization with a sharp (110)[001] orientation took place at temperatures between 1070 and 1085°C in the specimens with different nitrogen contents and different initial grain sizes.The existence of an optimum temperature range for the selective growth of the (110)[001] oriented grain in secondary recrystallization suggests that the Σ9 boundary becomes most mobile in the temperature range under the given inhibitor intensity.