离心铸造钛合金熔体补缩过程渗流流动物理模拟

Physical Simulation of Infiltration Flow during Centrifugal Casting Titanium Alloy Melts Feeding

摘要:

采用相似物理模拟法，研究了离心力场下钛合金熔体补缩过程中渗流流体体积的变化规律，并与大断面充型流动进行了对比。结果表明：随着补缩时间和旋转速度的增加，补缩过程中渗流流体体积增大；同时随着流体粘度和多孔介质孔眼数的减小，补缩过程中渗流流体体积也相应增大；当铸型顺时针旋转时，浇道左侧相对于右侧，先进行补缩渗流；补缩过程中渗流流动与大断面宏观充型流动相比，在相同时间内，渗流流体体积减少

Abstract:

By means of similar physical simulation method, the variation of infiltration volume is thoroughly studied during titanium alloy melt feeding in centrifugal field, and compared with the big cross-section filling process. The results show that the infiltration volume in feeding process increases with increasing the feeding time and velocity or decreasing the fluid viscosity and eyelet number of porous medium. When the mould rotates clockwise, the left part relative to the right part in running channel starts feeding and infiltration firstly. The infiltration volume decreases against the big cross-section macro-filling flow in the same time.