摘要
设计了一种用于Sn Sb等滑动轴承合金的无容器接触深过冷快速凝固装置。并以热流分析为基础,利用传热模型和物理模型计算了Sn 16%Sb(质量分数)过包晶合金在本装置中的冷却速度。结果表明:在粒子直径为4mm时,粒子的冷却速度为3.1×102K/s;当粒子直径为0.1mm时,冷却速度达到了105K/s。Sn Sb包晶合金组织显著细化,初生相SnSb化合物高度弥散化。
A new containerless rapid solidification device used to prepare Sn-Sb journal bearing alloys was developed. Based on the theory of heat flux, the cooling rate of Sn-16%Sb hyperperitectic alloy prepared by the device was calculated by means of modes of heat transfer and physics. The calculation results indicate that the cooling rate of a 4mm size droplet is 3.1×10~2 (K/s) and the cooling rate of a 0.1mm size droplet is 10~5 K/s. The experiment results show that the rapidly-solidified Sn-16%Sb hyperperitectic alloy exhibits notably refined grain and highly dispersed primary intermetallic SnSb phase, indicating that the device achieved grain refinement effects.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2004年第1期93-98,共6页
The Chinese Journal of Nonferrous Metals
基金
福建省自然科学基金资助项目(A0210008)
