한국주조공학회지 (Journal of Korea Foundry Society)

  • 제40권2호
  • /
  • Pages.34-42
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  • 2020
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  • 1598-706X(pISSN)
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  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
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차압주조공정에서 공정변수가 후육 주조품의 주조특성에 미치는 영향

Effect of Process Parameters on Thick-wall Thickness Casting Characteristics in Counter Pressure Casting Process

  • 강호정 (한국생산기술연구원 첨단정형공정연구그룹) ;
  • 윤필환 (한국생산기술연구원 첨단정형공정연구그룹) ;
  • 이규흔 (한국생산기술연구원 첨단정형공정연구그룹) ;
  • 김억수 (한국생산기술연구원 첨단정형공정연구그룹) ;
  • 박진영 (한국생산기술연구원 첨단정형공정연구그룹)
  • Kang, Ho-jung (Advanced Forming Process R&D group, Korea Institute of Industrial Technology) ;
  • Yoon, Pil-hwan (Advanced Forming Process R&D group, Korea Institute of Industrial Technology) ;
  • Lee, Gyu-heun (Advanced Forming Process R&D group, Korea Institute of Industrial Technology) ;
  • Kim, Eok-soo (Advanced Forming Process R&D group, Korea Institute of Industrial Technology) ;
  • Park, Jin-young (Advanced Forming Process R&D group, Korea Institute of Industrial Technology)
  • 투고 : 2019.12.17
  • 심사 : 2020.03.19
  • 발행 : 2020.04.30
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초록

The effects of the initial balancing pressure, filling pressure and maximum build-up pressure on the casting characteristics of the thick-wall thickness casting during the counter-pressure casting process were investigated. Water model experiment and a computer simulation were carried out to evaluate the characteristics during the filling and solidification stages in counter-pressure casting (CPC); as a reference, the low-pressure casting (LPC) process was used. The average dendrite cell size decreased with an increase in the solidification rate and maximum build-up pressure. A turbulent flow occurred during the filling stage of the LPC process, resulting in the formation of inner gas, while a lamellar flow pattern dominated during the CPC process and was more evident with an increase in the initial balancing pressure, improving the mechanical properties of the castings.

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