한국주조공학회지 (Journal of Korea Foundry Society)

  • 제24권1호
  • /
  • Pages.34-39
  • /
  • 2004
  • /
  • 1598-706X(pISSN)
  • /
  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
권호 표지

알루미늄 합금의 소실모형주조 시 유동도에 미치는 주조 조건의 영향

The Effect of Casting Conditions on the Fluidity during Lost Foam Casting of Al Alloy

  • 신승렬 (한국과학기술원 재료공학과) ;
  • 한상원 (한국과학기술원 재료공학과) ;
  • 이경환 (한국생산기술연구원 신소재개발본부) ;
  • 이진형 (한국과학기술원 재료공학과)
  • 발행 : 2004.02.20
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초록

The effects of casting condition and hot melt glue during Lost Foam Casting were investigated on the fluidity of Al alloy melt. The fluidity increased linearly with increasing pouring temperature in thick castings but non-linearly in thin casting due to the difference in main heat flow direction. The metal flow velocity was in range of $0.5{\sim}2.7$ cm/s in no evacuation condition and the minimum value of it was measured after the melt flow through the hot melt barrier. The mold evacuation improved the metal flow velocity by around $0.5{\sim}1$ cm/s. And the reaction zone layer thickness was about 1 cm in no-evacuation conditions but about 0.6 cm in mold evacuation condition of 710 torr due to the easier removal of pyrolsis product of EPS. And hot melt barrier thickness of 0.6 mm increased the reaction zone layer thickness up to about 2.5 cm. The fluidity decreased remarkably with an enlarged thickness of hot melt due to a lot of pyrolysis products.

키워드

참고문헌

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