摘要
研究了在电磁搅拌制备过共晶Al-Si合金半固态浆料中，冷却速度对初生Si的影响规律。试验表晨：连续冷却电磁搅拌可以使过共晶Al-Si合金的初生Si细化：在连续电磁搅拌电流20A下，冷却速度在3-10℃/min之间，随着冷却速度的增大，由于形核率的增加，初生Si的细化效果逐渐明显；冷却速度在10-24℃/min之间，随着冷却速度的增大，早于已经形核的初生Si产生团聚，其颗粒反而逐渐变大。
Effects of cooling rate on primary Si in hypereutectic Al-Si alloy prepared by electromagnetic stirring were investigated. Experiment indicates that continuous cooling rate can refine primary Si in hypereutectic Al-Si alloy in e-lectromagnetic stirring. The primary Si can be increasingly refined due to the increase of the nucleation rate with the increase of the cooling rate in the range of 3 癈/min ~ 10 癈/min under the condition of electromagnetic stirring current of 10 A while the grain size will become coarse due to the aggregation of nucleated primary Si with the increase of the cooling rate in range of 10C /min ~24C/min.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2006年第1期34-36,共3页
Special Casting & Nonferrous Alloys
基金
云南省科技型中小企业创新专项资助项目(2004CX15)
