稀土La和Ce对ZL201合金铸造性能的影响  

Effect of Rare Earth La and Ce on Casting Property of ZL201 Alloy

作　　者：米国发[1] 刘彦磊[1] 龚海军[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454003

出　　处：《热加工工艺》2008年第15期34-37,40,共5页Hot Working Technology

基　　金：河南省杰出人才创新基金资助项目(062100070)

摘　　要：研究了稀土La和Ce的加入对ZL201合金流动性、自由线收缩、合金热裂倾向的影响。试验表明:稀土元素的加入提高了合金的流动性,使其非平衡液相线和固相线温度均略有提高;温度相对降低的过程中,收缩量激增,液固两相温度区间略有缩小,合金线收缩率减小。稀土元素的存在,在一定程度上降低了合金断裂温度并提高了断裂应力。The effect of rare earth La and Ce on fluidity, free-linear contraction and heat tearing tendency of ZL201 was studied. The experimental results show that the addition of rare earth increases fluidity of the alloy, non-equilibrium liquid phase and solid phase curves were improved a little at the same time. During the reduction of temperature, the shrinkage volume soars and the temperature zone between fluid phase and solid phase shortenes a little, the linear contraction rate reduces. The existence of rare earth in the alloy decreases the fracture temperature and increases the fracture resistance.

关 键 词：ZL201 流动性 线收缩 热裂 

分 类 号：TG211[金属学及工艺—铸造] TG213