铸造技术2017，Vol.38Issue(10)：2437-2440,4.DOI:10.16410/j.issn1000-8365.2017.10.032
蛇形通道浇注法制备半固态A390合金浆料
Preparing Semi-solid A390 Alloy Slurry Though Serpentine Channel Pouring Process
郑涛 1施瀚超 1乔燕琦1
作者信息
- 1. 北京航空材料研究院焊接与塑性成形研究所,北京100095
- 折叠
摘要
Abstract
The serpentine channel pouring process for preparing semi-solid A390 alloy slurry was used and mechanism of refinement of the primary Si in A390 alloy was investigated.The results show that preparing semi-solid A390 alloy slurry with high quality through serpentine channel pouring process is feasible,especially when the pouring temperature is 690℃,the primary Si grains of slurry are refined to the greatest extent and the equivalent grain diameter and the average shape factor of the primary Si were 19.7μ m and 0.7.The primary Si nucleus could be easily precipitated due to chilling effect of the channel inner wall,thus the primary Si grains are refined;meanwhile,the alloy melt fluid also promote the separation of primary Si grains from the inner wall,further refining the primary Si grains.Therefore,the primary Si grains of A390 alloy could be refined by the serpentine channel pouring process,which offere a new process method for refining the primary Si grains of A390 alloy without any chemical refinement operation.关键词
半固态/A390合金/蛇形通道/初生硅Key words
semi-solid/A390 alloy/serpentine channel/primary Si分类
矿业与冶金引用本文复制引用
郑涛,施瀚超,乔燕琦..蛇形通道浇注法制备半固态A390合金浆料[J].铸造技术,2017,38(10):2437-2440,4.
