镁合金离心铸造工艺数值模拟研究  

Numerical Simulation of Centrifugal Casting Process for Magnesium Alloy

作　　者：康建明 梁海成[1] 赵大志 乐启炽 Kang Jianming;Liang Haicheng;Zhao Dazhi;Le Qichi(School of Materials Science and Engineering,Shenyang Ligong University;School of Materials Science and Engineering,Northeastern University)

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110159 [2]东北大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2023年第4期452-456,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(2021LYF9012);辽宁省教育厅科学研究经费资助项目(LG202010)。

摘　　要：为研究镁合金在卧式离心铸造条件下的流动性,以AZ31B镁合金为对象,采用有限元数值模拟,探究了不同初始条件下离心铸造的温度场和压力场的分布,分析了从浇注到凝固过程中的流动和温度变化情况。结果表明,受流动、旋转和回流等影响,温度场存在小范围波动,总体趋势是浇注后温度短时间内上升,然后逐渐下降直至凝固。分析了铸型内壁压力场分布,发现随着浇注过程进行,内表面压力由负压逐渐增大至平稳值,且随温度变化不大,随离心转速的增大而增大。In order to understand the macroscopic flow of magnesium alloy in horizontal centrifugal casting,Az31B magnesium alloy was simulated by means of finite element method to explore the distribution of temperature field and pressure field of centrifugal casting under different initial conditions.The flow and temperature changes from pouring to solidification were analyzed.It is found that the temperature field is fluctuated in a small range under the influence of flow,rotation and backflow.The general trend is that the temperature is increased in a short time after pouring,and then gradually decreased until solidification.The pressure field distribution of inner wall of centrifugal cylinder was analyzed.It is found that the inner surface pressure is increased gradually from negative pressure to stable value with pouring,and its change can be neglected with the temperature,while increased with the increase of centrifugal speed.

关 键 词：镁合金 AZ31B镁合金 离心铸造 数值模拟 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG249.4[金属学及工艺—金属材料] TP311[金属学及工艺—金属学]