中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 No. 9 September 2012 |
（1. Mechanical Engineering Department, Islamic Azad University of Komeyni Shahr, Esfahan 119-84175, Iran;
2. Materials Engineering Department, Faculty of Mechanical Engineering,
Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia;
3. Materials Engineering Department, Faculty of Mechanical Engineering,
Shahid Rajaee Teacher Training University, Tehran 16785-136, Iran）
Abstract:An experimental study on lost foam casting of an Al-Si-Cu alloy was conducted. The main objective was to study the effect of pattern coating thickness on casting imperfection and porosity percentage as well as eutectic silicon spacing of the alloy. The results showed that increasing slurry viscosity and flask dipping time influenced the casting integrity and microstructural characteristics. It was found that thinner pattern coating produced improved mould filling, refined microstructure and higher quality castings containing less porosity.
Key words: aluminum alloy; lost foam casting; coating thickness; slurry viscosity; dipping time; porosity
