pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (34권5호 156-161)
Modification Behavior of Eutectic Si with Varying Heat Treatment Conditions in A356 Alloy with Al2Ca
Al2Ca를 함유한 A356 합금에서의 다양한 열처리 조건에 따른 공정 Si 개량화 거동
Se-Jun Kim*,**, Soong-Keun Hyun**, Shae K. Kim* and Young-Ok Yoon*†
*Rare Metal R&BD Group, Korea Institute of Industrial Technology, **Dep. Adv. Mater. Eng., Inha Univ
This study is focused on the effect of Al2Ca as a modifier on eutectic Si modification of A356 alloy. Microstructural observation was carried out for as-cast, as-solution treated and as-aged samples. Solution treatment and aging were performed for 2, 4, 6 a 6 and 10 hrs at 540oC and 170oC, respectively. Although A356 alloy, which Al2Ca was added, has no significant difference in as-cast phases with normal A356 alloys, it shows much more modified eutectic Si, grain refinement and improved tensile pr property both in as-cast and as-heat treated conditions. TGA result shows that Al2Ca added A A356 alloy has a certain improvement in oxidation resistance.
A356, Eutectic Si, Modification, Al2Ca, Oxidation resistance
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