발간논문

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Vol.36, No.8, 1270 ~ 1278, 1998
Title
Analysis of δ-ferrite distribution in continuously cast type 304 stainless steel slabs
김선구 , 김종완 , 이용득 Sun Koo Kim , Jong Wan Kim , Yong Deuk Lee
Abstract
To find out the mechanism of the variation of δ-ferrite content through the thickness of continuously cast type 304 stainless steel slabs, the δ-ferrite morphology, solidification structure and secondary dendrite arm spacing were examined. And also the finite difference method was used for the analysis of heat transfer in a slab during continuous casting. In the 60 ㎜ thickness region below the surface of a slab, the δ-ferrite content increased with the depth. In this region the secondary dendrite arm spacing was the main factor determining the final δ-ferrite content. In the 60-90 ㎜ deep region, the δ-ferrite content increased owing to the effects of two factors; One was the decreased diffusion time and the other was different morphology originating from the equiaxed dendrite. In center region, the δ-ferrite content decreased due to the different solidification mode caused by the center segregation.
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