| Title |
Analysis of δ-ferrite distribution in continuously cast type 304 stainless steel slabs |
| Authors |
김선구(Sun Koo Kim) ; 김종완(Jong Wan Kim) ; 이용득(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. |