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Korean Journal of Metals and Materials > Volume 55(7); 2017 > Article
Korean Journal of Metals and Materials 2017;55(7): 515-522. doi: https://doi.org/10.3365/KJMM.2017.55.7.515
마그네슘 합금 박육 부품 다이캐스팅 주조시 오버플로우 형상 및 주입속도가 주조 품질에 미치는 영향
권의혁, 권재홍, 김병철, 한정환
인하대학교 신소재공학과
Effect of Overflow Geometry and Injection Speed on the Casting Product during the Magnesium Alloy Die-casting Process for Thin-walled Electronic Housing Components
Eui-Hyuk Kwon, Jaehong Kwon, Beyong-Chul Kim, Jeong-Whan Han
Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea
Correspondence  Jeong-Whan Han ,Tel: +82-32-860-7543, Email: jwhan@inha.ac.kr
Received: 13 December 2016;  Accepted: 22 February 2017.  Published online: 4 July 2017.
ABSTRACT
Casting defects such as gas traps and oxide particles must be removed in the die-casting process in order to obtain good cast products. Experimental research is costly and time-consuming, so computer simulations are typically performed in advance and then compared to experimental results. In this paper, a magnesium alloy die-casting process for a thin-walled mobile phone housing with 0.4mm thickness was investigated. The study examined the effects of important parameters such as overflow geometry and injection speed on surface defect and solid fractions. The overflow shape and second plunger speed were determined by simulations and experiments using an actual manufacturing process. In addition, the simulations predicted in this study showed in good agreement with the experimental results.
Keywords: diecasting, simulation, magnesium, overflow, porosity
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