발간논문

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Vol.19, No.1, 57 ~ 64, 1981
Title
The Effect of Sulfur on the Secondary Recrystallization in 3% Silicon - Steel
박영기Young Ki Park, 원동연Dong Yun Won, 임호빈Ho Bin Im
Abstract
To produce oriented silicon steel, it is necessary to develop (110) [001] texture by the secondary recrystallization. The inhibition of a normal grain growth is required for the secondary recrystallization. The grain growth inhibition is known to be associated with the presence of dispersed particles or solute elements segregated in grain boundary. The effect of sulfur on the secondary recrystallization in 3% silicon steel with 0.03-0.4 w/o manganese and 10-25 ppm boron were investigated by the various annealings and the analysis of sulfur composition. Secondary recrystallization was observed only in the strip with excess sulfur which remained after the formation of manganese sulfide. Otherwise normal grain growth was observed. It was also observed that secondary recrystallization started from the surface of the strip which contained 0.035 w/o manganese and 0.053 w/o sulfur, and that desulfurization was a diffusion controlled process at 850℃ and 960℃ in hydrogen atmosphere. From these results, it is concluded that secondary recrystallization in our specimens occurred due to the inhibition of primary grain growth by excess sulfur rather than manganese sulfide particle.
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