(1. 四川大學(xué) 金屬材料系, 成都 610065;
2. 國營建中化工總公司, 宜賓 644000)
摘 要: 用真空保護氣氛熔煉不同鋰加入量的銅鋰合金，得到系列表面光滑、內(nèi)部致密的銅錠，并研究了鋰對工業(yè)純銅凝固特性的影響。結(jié)果表明：鋰能消除合金凝固態(tài)的柱狀晶區(qū)并使之轉(zhuǎn)變?yōu)榈容S晶區(qū)；微量鋰增大了工業(yè)純銅的晶粒尺寸，且隨鋰含量的增加，其晶粒尺寸亦隨之增大；當(dāng)鋰含量增至一定值后，其晶粒尺寸則隨鋰含量的繼續(xù)增加而減小。
關(guān)鍵字: 鋰； 純銅； 凝固特性
characteristics of pure copper
LI Ning1, TU Ming-jing1, ZHANG Zi-ming2, HU Zhao-min2
（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
