冷却速度对过共晶Al-Si合金初生Si的影响规律

管桂生; 卢德宏; 蒋业华; 周荣

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冷却速度对过共晶Al-Si合金初生Si的影响规律
Effects of Cooling Rate on Primary Si in Hypereutectic Al-Si Alloy
2006年第1期页码：34-36
纸质出版日期： 2006 ，
DOI：

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[1]管桂生,卢德宏,蒋业华,周荣.冷却速度对过共晶Al-Si合金初生Si的影响规律[J].特种铸造及有色合金,2006(01):34-36+1.

Guan Guisheng, Lu Dehong, Jiang Ye-hua, et al. Effects of Cooling Rate on Primary Si in Hypereutectic Al-Si Alloy[J]. Special Casting & Nonferrous Alloys, 2006,(1):34-36.
[1]管桂生,卢德宏,蒋业华,周荣.冷却速度对过共晶Al-Si合金初生Si的影响规律[J].特种铸造及有色合金,2006(01):34-36+1. DOI：

Guan Guisheng, Lu Dehong, Jiang Ye-hua, et al. Effects of Cooling Rate on Primary Si in Hypereutectic Al-Si Alloy[J]. Special Casting & Nonferrous Alloys, 2006,(1):34-36. DOI：

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。试验表明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

0℃/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

4℃/min之间

随着冷却速度的增大

由于已经形核的初生Si产生团聚

其颗粒反而逐渐变大。

Abstract

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

4C/min.