(1. 四川大学 金属材料系, 成都 610065;
2. 国营建中化工总公司, 宜宾 644000)
摘 要: 用真空保护气氛熔炼不同锂加入量的铜锂合金，得到系列表面光滑、内部致密的铜锭，并研究了锂对工业纯铜凝固特性的影响。结果表明：锂能消除合金凝固态的柱状晶区并使之转变为等轴晶区；微量锂增大了工业纯铜的晶粒尺寸，且随锂含量的增加，其晶粒尺寸亦随之增大；当锂含量增至一定值后，其晶粒尺寸则随锂含量的继续增加而减小。
关键字: 锂； 纯铜； 凝固特性
characteristics of pure copper
（1. Department of Metallic Materials, Sichuan University,
Chengdu 610065, P.R.China;
2. Jianzhong Chemical Company of State Owned，
Yibin 644000, P.R.China）
Abstract:A series of Cu-Li alloys with different contents of lithium have been obtained by means of vacuum induction furnace at Ar atmosphere .The results show that the dendrite crystal area of alloy is diminished and then become equiaxed structures after lithium is added; the industrial copper grain size become bigger with the increase of lithium content when the content is very small, but when the content reaches a special value, the grain size decreases sharply and then become smaller gradually with the increase of lithium content, even much smaller than pure copper.
Key words: lithium; copper; solidification characteristic
