Effect of Pressurizing Velocity on Flow Morphology of Vacuum Counter-Pressure Casting Aluminum Alloy

摘要：

Through testing flow morphology of vacuum counter-pressure casting aluminum alloy under different pressurizing velocity by electrode contacting method, the effect of pressurizing velocity on flow morphology of vacuum counter-pressure casting aluminum alloy are explored. The results indicate that filling process of vacuum counter-pressure casting aluminum alloy is unsteady development process of limited jet stream, which can be divided into four character zones such as the jet stream zone, the mAln vortex area, the frontal vortex area and the hinder vortex area. When the pressurizing velocity is low during filling mould, the viscous resistance and surface tension of wall-liquid playa major role, and the flow morphology of vacuum counter-pressure casting aluminum alloy is relatively stable, which belong to an obverse filling morphology. When the pressurizing velocity is very high, initial momentum plays a major role, and its flow morphology is unstable, which belong to an inverse filling morphology. The obverse filling morphology is an ideal filling mode which can obtAln high quality castings in the filling process of vacuum counter-pressure casting, therefore, the pressurizing velocity must be reasonably controlled to ensure to obtAln the obverse filling morphology.

关键词： vacuum counter-pressure casting pressurizing velocity flow morphology obverse filling mould inverse filling mould

作者: Yan Qingsong Yu Huan Xu Zhifeng Cai Changcbun Xiong Bowen

作者单位: National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchan National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang

会议类型: 国际会议

会议名称: 69th World Foundry Congress(第69届世界铸造会议 WFC 2010)

会议地点: 杭州

会议语种:英文

页码: 818-822

在线出版日期: 2010-10-16（万方平台首次上网日期，不代表论文的发表时间）