Al-Pb合金的快速定向凝固及其模拟  

RAPID DIRECTIONAL SOLIDIFICATION AND ITS SIMULATION OF Al-Pb ALLOYS

作　　者：张钦霞[1] 赵九洲[1] 何杰[1] 陈桂云[1] 

机构地区：[1]中国科学院金属研究所,沈阳110016

出　　处：《金属学报》2007年第9期925-929,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目500671111和50620130095;辽宁省自然科学基金项目20052011资助

摘　　要：对Al-Pb合金开展了快速定向凝固实验,并根据实际凝固条件模拟计算了合金的组织演变过程.结果表明,当凝固速度不变时,Pb相粒子尺寸及其分布范围随Pb含量的增加而增大;当合金成分不变时,Pb相粒子尺寸及其分布范围随凝固速度的增加而减小.模拟结果与实验数据吻合较好,展现了快速定向凝固条件下Al-Pb合金的凝固组织形成过程.Rapid directional solidification experiments were carried out with Al-Pb alloys. The microstructure evolution during the solidification was calculated according to the practical experimental conditions. The results indicate that under a constant solidification velocity, the size and its distribution width of the minority phase droplets increase with increasing the Pb content in the alloy. For an alloy of given composition, the size and distribution width of the minority phase droplets decrease with increasing the solidification velocity. The numerical results, which have an acceptable coincidence with the experimental ones, exhibit clearly the microstructure evolution process.

关 键 词：AL-PB 偏晶合金 快速定向凝固 液-液相变 模拟 

分 类 号：TG146[一般工业技术—材料科学与工程] TG224[金属学及工艺—金属材料]