研制了一种新型、高效的 Al-Sr-RE 复合细化变质剂，该合金熔点较低(639.2～740℃)，变质潜伏期短(≤ 10 min)，变质能力强，变质效果好，并且可以显著细化 Al-Si 合金枝晶组织，与工业用 Al-10Sr、Al-8.7Sr-2.8Ti-0.2B 合金相比，该合金使 ZL 102 合金的二次枝晶间距减小了 22.6%～23.2%。
A novel Al-Sr-RE combined refiner/modifier for Al-Si casting alloys with lower melt point(639.2～740℃) and shorter incubation time(≤10 min) was developed. This refiner/modifier can modify the ZL102 alloy efficiently and refine the dendrite structure notably.Treated with the novel combined refiner/modifier, the secondary dendrite arm spacing(DAS) of the ZL102 alloy decreased by 22.6%～23.2% than that of with Al-10Sr or Al-8.7Sr-2.8Ti-0.2B master alloys.
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