pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (14권5호 464-470)
A Study on the Solidification Structure of Al-Si Alloy by the Continuous Casting with the Heated Mold
가열주형식 연속주조법에 의한 Al-Si합금의 응고조직에 관한 연구
Won-Tae Kim, Jeong-Tak Moon, Myung-Han Kim, Hyung-Ho Jo*
Chungbuk National Univ., *Korea Academy of Industrial Technology
The horizontal continuous casting method with the heated mold was applied to study the solidification structures of the pure Al and Al-0.5wt%Si and Al-1.0wt%Si alloy rods. The results could be summarized as follows: 1. The S/L interface structures of pure Al represented the hexagonal cells at the casting speed of 590 and 350mm/min, respectively. However, the hexagonal cells became irregular as the casting speed and(or) Si amount increased. 2. The striation increased as the Si amount and casting speed increased and was found to result from the occurrence of growth twin crystals by XRD analysis. 3. The striation did not affect the mechanical and electrical property of the drawn wire from the casted rod. This means the striation is not a serious defect which has to consider in the production of micro-sized fine wire in the drawing process.