pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (37권6호 181-185)
Effect of Critical Cooling Rate for Minimization of Porosity in the Thick Aluminum Casting
후육 Al 주조재의 기포결함 최소화를 위한 임계냉각속도의 영향
Si-Young Kwak*,**, In-Sung Cho*,**†, Yong-Hyun Kim*** and Hee-Kwon Lee***
*Cyber Manufacturing Process Group, Korea Institute of Industrial Technology (KITECH), Incheon 21999, Korea, **Department of Robotics and Virtual Engineering, University of Science and Technology (UST), Daejeon 34113, Korea, ***Daeshin Metals. Co., Ltd.,
In the present study, the effect of cooling rate on the formation of the porosity in the thick aluminum sand casting was investigated.Nowadays, due to considerations of weight and cost reduction, large scale thick aluminum casting has replaces steel frames for vacuum chambers for semiconductor production. Several thick aluminum castings were manufactured using chill with temperature measurements. The castings were inspected using 3D computed tomography in order to quantify the porosity defect density in the castings. Effects of the thickness of the chill on the porosity defect density were discussed.
Porosity, Cooling rate, Aluminum casting, Vacuum chamber, Computed tomography, Chill
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