Numerical study of crucial parameters in tilt casting for titanium aluminides

作     者：Hong Wang G. Djambazov K. A. Pericleous 

作者机构：School of Petroleum Engineering University of Changzhou Changzhou 213164 China Centre for Numerical Modeling and Process Analysis Universi~ of Greenwich London SEIO 9LS UK 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2011年第8卷第3期

页      面：274-281页

核心收录：

学科分类：08[工学] 080203[工学-机械设计及理论] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 

基　　金：financially supported by EU:IP project IMPRESS(Intermetallic Materials Processing in Relation to Earth and Space Solidif ication No.NMP3-CT-2004-500635) 

主　　题：crucial parameters numerical modeling tilt casting TiAI alloy 

摘      要：Numerical modeling of the tilt casting process for TiAI alloys was investigated to achieve a tranquil mould filling and TiAI castings free of defects. Titanium alloys are very reactive in molten state, so they are widely melted in cold crucible, e.g. the Induction Skull Melting （ISM） furnace. Then the crucible holding the molten metal together with the mould is rotated to transfer the metal into the mould -- ISM＋ tilt casting. This paper emphasizes the effect of crucial parameters on mould filling and solidification of the castings during tilt casting. All crucial parameters, such as rotation rate, rotation profile, venting, initial mould temperature, casting orientation, feeder design, change of radius in ＇T＇ junction and mould insulation have been discussed using numerical modeling data. Simulations were performed using a 3D CFD code PHYSICA implemented with front tracking, heat transfer algorithms and a turbulence model （which accounts for an advancing solid front）.