Four alloying elements including manganese,nickel,silicon and titanium were selected,and the L25(54)orthogonal test scheme was designed.The effects of manganese,nickel,silicon and titanium elements and their contents on the casting properties such as melting point,solidification temperature range and fluidity of Al-Mn die-casting aluminum alloys were discussed.The results show that the primary and secondary order of influence on the fluidity of Al-Mn die-casting aluminum alloys is Ti,Mn,Si and Ni elements.When the alloy composition(wt％)is Al-0.6Mn-0.lNi-0.1Si-0.0Ti,the Al-Mn die-casting alloy has the best fluidity.The melting point of the Al-Mn die-casting alloy is 663.2 ℃,which is 75.9 ℃ higher than that of the ADC 12 die-casting aluminum alloy.The solidification temperature range of the die-casting aluminum alloy is 28.6 ℃,which is 27.6 ℃ lower than the solidification temperature range of the ADC12 die-casting aluminum alloy,which is 56.2 ℃.The fluidity of Al-Mn die-casting aluminum alloy is comparable to that of the ADC 12 die-casting aluminum alloy.
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