摘要
采用稀土处理ZL104铝合金,研究了稀土对铝合金半固态重熔加热过程中组织变化的影响。结果发现:稀土显著细化了半固态铝合金的球形晶粒组织,并提高了球形晶粒的圆整度和均匀性。而且,稀土明显降低了初生树枝晶的球化速度和球形晶粒的长大速度,大大地延长了球形晶粒粗化的时间。并且,进一步分析了稀土细化机制。
Al-alloy ZL104 was treated with rare earth,and the effects of RE on the structure of semisolid Al-alloy during reheating were investigated.The experimental result shows that RE can refine the globular grains of semisolid Al-alloy remarkably,improve the roundness and uniformity of globular grains.Moreover, RE decreases the spheroidization velocity of the primary dendritic crystal and the coarsening velocity of globular grains obviously.Therefore,the coarsening time of globular grains can be prolonged greatly.The refining mechanism of RE was analyzed.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2005年第S2期104-106,共3页
Journal of the Chinese Society of Rare Earths
基金
安徽省优秀青年科技基金(04044058)
关键词
铝合金
半固态
球形晶粒
细化
稀土
Al-alloy
semisolid
globular grains
refining
rare earths
