摘要
采用低压铸造的方法,通过两种不同的冷却工艺制备出了A356铝合金轮毂。论文主要研究了两种不同冷却工艺下,所制轮毂的缺陷分布、缺陷种类和缺陷比率,以及缺陷比率对轮毂力学性能的影响,并分析了二次枝晶间距对轮毂力学性能的影响。研究表明,完全水冷工艺(同时凝固)所制轮毂缺陷较为严重,几乎在轮毂各个部位均生成了缩松或夹杂,但由于完全水冷工艺使合金较快的冷却,所制备合金的晶粒十分细小,这使得合金的力学性能比顺序凝固工艺所制样品更为优良。
A356 aluminium alloy wheels have been prepared by low pressure casting through two kinds of cooling process.The effects of different cooling process on distribution, type and ratio of wheels＂ defect have been mainly studied and the effects of defect ratio and secondary dendrite arm spacing on mechanics properties of wheels also been studied. The study showed that there were serious defects in the wheel produced by wholly water-cooled process. Shrinkage porosity and inclusion presented in nearly every part of the wheel. Due to the high cooling rate coming from wholly water-cooled process, however, the grain of the alloy was very small,so its mechanics properties were higher than the wheel produced by consecutive solidification process.
出处
《中国铸造装备与技术》
CAS
2011年第5期6-11,共6页
China Foundry Machinery & Technology
关键词
A356铝合金
轮毂
低压铸造
冷却工艺
缺陷
力学性能
A356 aluminium alloy
Wheel
Low pressure casting
Cooling process
Defect
Mechanics property
