快速凝固Cu－Pb亚偏晶合金的自生复合行为  

In-Situ Composite Growth of Rapidly Solidified Cu-Pb Hypomonotectic A11oy

作　　者：蔡英文[1] 李建国[1] 傅恒志[1] 

机构地区：[1]西北工业大学凝固技术国家实验室

出　　处：《材料工程》1995年第4期20-22,5,共4页Journal of Materials Engineering

摘　　要：应用单辊工艺研究了Ｃｕ－Ｐｂ亚偏晶合金在急冷条件下的凝固行为。发现急冷细化了共生相间距，拓宽了偏晶共生的成分范围，并对共生形态具有规整化作用。此外，首次观察到了高度规则的放射状共生现象。同时从传质控制角度推导了偏晶共生模型。olidification behavior of Cu-Pb Hypomonotectic alloy with rapid cooling rate is detected by melt spin-ning processing.It is found that rapid cooling refines the phase spacing of composites,extends the composi-tion range over which composites can be formed to low lead content,and regularizes the composite morphol-ogy. Meanwhile,very regular radiated structure is observed for the first time. A model for rapid monotec-tic composite growth which agrees with experimental results is developed from the balance of mass trans-fer.

关 键 词：快速凝固 偏晶共生 溶质输运 偏晶合金 

分 类 号：TG111.4[金属学及工艺—物理冶金]