pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (10권1호 57-63)
Microstructures and Mechanical Properties of Al-Cu Eutectic Composite by Upward Continuous Casting
상향식 연속주조법으로 제조한 Al-Cu 공정 복합재료의 응고조직 및 기계적 성질
Kee-Kyun Kwon*, Kuk Hyun-Sun Woo**, Kye-Wan Lee*‘**
*Graduate school of Hang Yang Univ.,**Yonsei Univ., ***Hang Yang Univ.
Continuous casting of the Al-CuAl_2 eutectic composite was carried out by the upward continuous casting process. The morphology of the eutectic growth and the stability of solid-liquid interface were investigated under various growth conditions. It was possible to get the planar solid-liquid interface at the condition of G_L/R＝3.6x10^3^℃sec/mm^2. And the colony structures were formed at the conditions of G_L/R < R=0.33x10^3^℃sec/mm^2. The inter-lamellar spacing of Al-CuAl_2 eutectic composite was decreased with the increase of pulling speed. The reduction of inter- lamellar spacing & value of G_L/R caused the increase of ultimate tensile strength and Rockwell hardness in Al-CuAl_2 eutectic composite.
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