镁合金压铸充型过程的模拟仿真与试验验证  

Simulation and experimental verification of the casting and filling process of magnesium alloy

作　　者：胡亚平[1] 陈国香[2] 

机构地区：[1]江西农业大学计算机与信息工程学院,江西南昌330045 [2]南昌大学机电工程学院,江西南昌330031

出　　处：《模具工业》2008年第7期49-53,共5页Die & Mould Industry

基　　金：江西省教育厅资助项目(Z03486)

摘　　要：建立了耦合半固态镁合金表观黏度流变充型模拟的三维数学模型,对比了液态充型与半固态充型的流动特征,结果表明,液态充型呈紊流特征,而半固态充型平稳,呈层流特征,可减少铸件中出现气孔及氧化夹渣等铸造缺陷,最后通过试验发现半固态压铸件质量优于液态压铸件。A 3D mathematical model of rheologic mould-filling coupled with semi-solid magnesium alloy apparent viscosity was established. The flow characteristics of liquid filling and semi-solid filling were compared and analyzed. The results indicate that the liquid filling is characteristic of turbulent flow, while the semi-sold filling has laminar flow characteristic which can reduce the foundry defects such as gas cavity and oxide inclusion. The experiment shows that the quality of semi-solid die castings are better than that of liquid die castings.

关 键 词：半固态 镁合金 流变充型 模拟 

分 类 号：TP39[自动化与计算机技术—计算机应用技术] TG249.2[自动化与计算机技术—计算机科学与技术]