The effects of sulfur on the secondary recrystallization in 3% Si-Iron with manganese and boron were investigated by the final high cold reduction (78%) and the texture annealing. The composition of manganese and sulfur was 0.03 - 0.04%, 0.013 - 0.059% respectively, and the amount of boron added was 10 - 25 ppm. Dry $H_2$ and $N_2$ gases were used in texture annealing atmosphere.
Normal grain growth or incomplete secondary recrystallization was observed when the ratio of weight percent of manganese to that of sulfur is larger than 1.7, whereas secondary recrystallization was observed when that ratio is less than 1.7. It was also observed that the secondary recrystallization started from the surface of the strip.
These results indicate that Secondary Recrystallization may occur due to the inhibition of primary grain growth by solute sulfur rather than by the MnS ppt.
10-25ppm의 born과 0.03 ~ 0.04% $M_n$, 0.013 ~ 0.059% Sulfur 양을 갖는 3%규소철을 78% 이상의 최종 압하율로 냉연한 판재를 열처리하여 제2차 재결정 현상을 조사하였다.
MnS를 형성한 나머지 Sulfur가 있는 시편에서는 제2차 재결정을 일으켰으며 이때 제2차 재결정은 탈황이 되기 쉬운 판재표면에서 시작이 된다.
이는 $M_nS$ 석출물효과에 의한 제일차 재결정 성장 억제라기보다는 원자상태의 Sulfur가 입계에 편석이 되어 제일차 재결정 성장을 저지해 주는 것으로 사료된다.
