摘要
采用分散相粒子模型对铝合金重力浇铸件的夹渣行为进行了模拟,通过实验对该模型的可靠性进行了验证。在此基础上设计了4种浇注系统并进行了挡渣模拟,以探索浇注系统对铸件夹渣行为的影响。结果表明:半封闭平直横浇道具有离心式集渣包的浇注系统,可以显著减少铸件夹渣。利用横浇道降低金属液的流动速度,延长渣粒的运动距离,促进渣粒上浮运动是提高浇注系统挡渣效果的关键。
The slag inclusion behavior of the gravity casting aluminum alloy was simulated by the dispersed phase particle model. And the model＇s reliability was verified by experiment. On the basis of this, four kinds of gating systems were designed and the effects of slag removal were simulated to explore the effect of gating system on slag inclusion behavior of casting. The simulation results show that, the gating system of semi-closed and flat-straight cross gate with centrifugal scum riser can greatly reduce the casting slag defects. By using cross gate to reduce metal liquid flow velocity and prolong the slag grain movement distance, promoting slag grain float upward motion is the key of improving the effects of slag removal of gating system.
出处
《热加工工艺》
CSCD
北大核心
2013年第11期45-48,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(51165030)
关键词
分散相模型
夹渣模拟
浇注系统
挡渣效果
dispersed phase model
slag inclusion simulation
gating system
effects of slag removal
