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Abstract:To increase the industrial applicability of hypereutectic Al-Si alloys,various methods have been used to refine primary silicon.The addition and refinement effects of phosphorus(P),rare earth metals(RE) on primary Si have been studied widely.But they have been testified be with some disadvantages,that is,the pollution to the environment of P and the high cost of RE,etc.Now,a new refiner-Zn S and the corresponding processing technology were researched.Microstructures of hypereutectic Al-Si alloy(Si wt.24%) with fine primary Si were successfully obtained.And the primary Si can be refined from more than 80μm to 20μm.And the distribution of primary silicon is getting more uniform.
Volume:Vol.1088
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Translation or Not:no