大型复杂ZL205A铝合金骨架铸造工艺设计与优化

Process Design and Optimization of Large-scale Complex ZL205A Aluminum Alloy Skeleton Castings

介绍了某大型复杂ZL205A铝合金骨架铸造工艺设计与优化的过程,并在工艺优化过程中采用铸造工艺模拟技术等先进手段对其进行模拟。结果表明,在铸件上部厚大部位的热节点放置冷铁,使骨架铸件实现了顺序凝固,能够降低缩孔、缩松现象,并通过在砂芯表面进行涂料刷涂,提高砂型强度,能够减少夹渣(砂)现象,提高铸件的合格率。

The process design and optimization of large-scale complex ZL205A Al-alloy skeleton castings was described,using casting process simulation technology and other advanced methods. The results show that the chilling block is placed on the hot node at the upper thick part of the casting to achieve progressive solidification, reduce the shrinkage cavity and shrinkage phenomenon. Furthermore, a coating on the surface of sand core was painted to improve the sand core strength,reduce slag(sand) phenomenon and improve the qualification rate of the casting.