Journal of Korea Foundry Society (한국주조공학회지)
- Volume 18 Issue 3
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- Pages.275-282
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- 1998
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- 1598-706X(pISSN)
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- 2288-8381(eISSN)
Formation and Prevention of Macrodefects in the Squeeze Casting of a Mg-5wt%Al-0.6wt%Zr Alloy
Mg-5wt%Al-0.6wt%Zr합금의 용탕단조시 주조결함의 형성 및 방지
- Hwang, Young-Ha (Dept. of Metallurgical Eng., Yonsei Univ.) ;
- Huh, Seung-Ho (Dept. of Metallurgical Eng., Yonsei Univ.) ;
- Hong, Chun-Pyo (Dept. of Metallurgical Eng., Yonsei Univ.)
- Published : 1998.06.20
Abstract
The squeeze casting of a Mg-5wt%Al-0.6wt%Zr alloy was carried out to investigate the conditions for the formation and the prevention of macrodefects, such as macrosegregation and shrinkage defects. The effects of the process parameters, the applied pressure, the die temperature, and the pouring temperature on the formation of macrodefcts were investigated in correlation with the evolution of macrostructure. Three types of macrodefects were found; macrosegregation only, shrinkage defects only, both macrosegregation and shrinkage defects. It was found that the pouring temperature, the die temperature, and the applied pressure are closely related to the formation of macrodefects. Sound castings without macrosegregation and shrinkage defects can be obtained under the conditions of 80 MPa
$730^{\circ}C$
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