pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (25권3호 128-133)
The Effects of Mn and Cr Additions on the Microstructure of A356 Alloys Containing Impure Fe
불순 Fe를 함유한 A356 주조합금에서 미세조직 형성에 관한 Mn과 Cr의 효과
Sang Won Han
Korea Advanced Institute of Science and Technology
The effects of Mn and Cr on the crystallization behaviors of Fe-bearing intermetallics in A356 alloy were studied. Coarse and acicular B-Al5FeSi phase in A356-0.2owt.%Fe alloy was modified into small or-Al(Fe,Mn)Si and or-Al(Fe,Cr)Si phases in response to Mn and Cr addition, respectively. Increasing of Mn addition amount elevates the crystallizing temperature of ot-Al(Fe,Mn)Si and the Mn/Fe ratio in the ot-Al(Fe,Mn)Si. Cr is more effective to modify B-Al5FeSi in comparison with Mn. on-Al(Fe,Mn)Si phase had BCC/SC dual structure.
A356 cast alloy, Solidification sequence, Impurity F e, on-A1(Mn,Fe)Si, Crystal structure.
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