pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (43권6호 286-293)
Distribution Behavior of Solute Element in Al-Mg-Zn Alloy Continuous Cast Billet During Homogenization Treatment
Al-Mg-Zn 계 알루미늄 합금 연주 빌렛 균질화처리과정 중 용질원소 거동변화
Myoung-Gyun Kim
포항산업과학연구원
In this study, we investigated the microstructural evolution of Al-Mg-Zn aluminum alloy billet during homogenization treatment using OM, SEM, EDS and DSC. There were numerous phases found, such as; AlMgZn, AlMgFe, and AlMgZnSi phases, in the grain of the cast billet. After 6 hours homogenization treatment, Zn was mostly dissolved, whereas, Mg and Si were only partly dissolved. Accordingly, only AlMgFe and AlMgSi remained. After 18 hours, all of the leftover Mg and Si were dissolved, leaving only AlMgFe, which was also found after 24 hours. The results of the alloy design program, JMatPro showed that Mg dissloved more rapidly than Zn. According to the homogenization kinetic equation, Mg and Zn are completely dissolved within 1.9 and 3.5 hours, respectively.
Al-Mg-Zn alloy, Billet, Continuous casting, Homogenization treatment and Kinetic equation
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