摘要
介绍了阻尼冷却管法制备半固态浆料工艺的实验装置及其原理,采用A356铝合金进行了不同浇注温度的系列实验。铸件微观结构中晶粒尺寸和形状因子测算分析结果表明:由于阻尼冷凝管的冷却和搅拌作用,熔体浇注温度越低,在两相温度区间内生成的游离晶核就越多,浇铸的铸件晶粒尺寸和形状因子数值就越小,晶粒球化程度越高。阻尼冷凝管法制备的合金浆料或铸坯能够应用于下一步半固态成形加工。
The setup and principle od damper cooling tube （DCT） process to prepare the semisolid slurry of A356 aluminum alloy were introduced in different pouring temperatures. The results of measured and calculated grain size and shape factor in castings microstructure show that they are directly related to the pouring temperature, the lower the pouring temperature, the smaller the grain size and shape factor, due to the formation of stray nucleus and the cooling and stir of DCT. The semisolid slurry or billet produced by DCT processis are suitable for the semisolid processing owing to the fine grain size and spherical primary particles.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第5期915-919,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助项目(50374014)
关键词
阻尼冷却管法
半固态浆料
浇注温度
晶粒尺寸
形状因子
damper cooling tube method
semisolid slurry
pouring temperature
grain size
shape factor
