pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (13권1호 71-80)
Segregation of Squeeze Cast Al-7% Si-0.3% Mg Alloy Bars
용탕단조한 Al-7%Si-0.3% Mg합금 봉상시료의 편석거동
Ki-Young Kim*, Seok-Do Ki**, Jong-Rak Park**
*Korea Academy of Industrial Technology, **Daelim Precision Let.
Squeeze casting has advantages to improve mechanical properties of nonferrous castings without losing high productivity. Sound pore free structure makes it possible to be subjected to heat treatment and welding. This process became popular to produce lighter automobile parts alternating cast iron parts. It has, however, two disadvantages of segregation and scattered structure due to the solidified layers in sleeve. In this study segregation behavior of squeeze cast Al-7%Si-0.3%Mg alloy bars was investigated using HVSC machine under various injection conditions. Degree of segregation decreased with injection pressure and effect of injection velocity on it was small. Segregation mode of solute was strongly governed by solidification mode and flow pattern.