Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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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

  • Kim, Se-Jun (Rare Metal R&BD Group, Korea Institute of Industrial Technology) ;
  • Hyun, Soong-Keun (Dep. Adv. Mater. Eng., Inha Univ.) ;
  • Kim, Shae K. (Rare Metal R&BD Group, Korea Institute of Industrial Technology) ;
  • Yoon, Young-Ok (Rare Metal R&BD Group, Korea Institute of Industrial Technology)
  • 김세준 (한국생산기술연구원 희소금속연구실용화그룹) ;
  • 현승균 (인하대학교 신소재공학부) ;
  • 김세광 (한국생산기술연구원 희소금속연구실용화그룹) ;
  • 윤영옥 (한국생산기술연구원 희소금속연구실용화그룹)
  • Received : 2014.09.03
  • Accepted : 2014.10.16
  • Published : 2014.10.31
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Abstract

This study is focused on the effect of $Al_2Ca$ 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 and 10 hrs at $540^{\circ}C$ and $170^{\circ}C$, respectively. Although A356 alloy, which $Al_2Ca$ 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 property both in as-cast and as-heat treated conditions. TGA result shows that $Al_2Ca$ added A356 alloy has a certain improvement in oxidation resistance.

Keywords

References

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