文献类型：期刊文献

中文题名：铝硅基精铸材料薄壁壳体成型多尺度分析

英文题名：Multi-scale analysis of solidification process of thin-walled shell of Al-Si based cast alloy

作者：马勇杰[1,2];张建成[1,2];刘欢[2]

第一作者：马勇杰

机构：[1]北京联合大学北京市智能机械创新设计服务工程技术研究中心,北京100027;[2]北京联合大学机器人学院,北京100027

第一机构：北京联合大学机器人学院

年份：2020

卷号：0

期号：4

起止页码：96-102

中文期刊名：现代制造工程

外文期刊名：Modern Manufacturing Engineering

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：北京市教委科技计划项目(KM201611417010);北京联合大学人才强校优选计划支持。

语种：中文

中文关键词：铝硅基精铸材料;高温压缩试验;薄壁壳体;数值模拟;多尺度分析

外文关键词：Al-Si based cast alloy;high-temperature compression test;thin-walled shell;numerical simulation;multi-scale analysis

摘要：针对铝合金薄壁壳体铸造成型高质量要求,通过向ZL101A铝合金中增添Al-10Sr变质剂以及微量Ni元素,制备铝硅基精铸材料坯件,借助加热设备与SCC-44500电子万能试验机对铝硅基精铸材料进行高温压缩试验,得到不同应变率与不同温度下材料的应力-应变曲线,发现铝硅基精铸材料在各应变率及温度下的屈服强度相对ZL101A铝合金均提高。以铝硅基精铸材料进行液压泵薄壁壳体铸造工艺设计分析,基于ProCAST铸造模拟软件,采用低压铸造工艺方案对铝合金薄壁壳体低压铸造过程进行多尺度模拟,分析预测得到了温度场和流动场对铸件充型和凝固过程中缩孔缩松形成的影响,并对壳体铸件的显微组织特征进行了分析,观察得到内部二次枝晶臂间距和共晶层片间距分布状态,综合分析宏微观结果可知,适合的铸造工艺可以制备出完整高性能的铝硅基合金薄壁壳体铸件。
Due to the high quality requirements for the thin-walled shell of the cast aluminum alloy,the unmodified ZL101A aluminum alloy with the addition of Al-10Sr modifer and trace Ni were investigated,which was used for the preparation of Al-Si based cast alloy specimen.With the help of heating equipment,these specimens were examined from high-temperature compression tests on a SCC-44500 electronic universal testing machine.And true stress and true strain values were obtained in a wide range of temperatures and strain rates.It was found that the Ni addition increased the Al-Si based cast alloy yield strength compared with the ZL101A aluminum alloy.The Al-Si based cast alloy was selected for the hydraulic pump thin-walled shell casting process design with the ProCAST software.The multi-scale simulation technique has been employed to study the low pressure casting process for the aluminum alloy thin-walled shell.The influence of the temperature and flow fields on the defects of shrinkage cavity and porosity in the process of molten metal filling and solidification was predicted.With the proposed models,the microstructure evolution,including distributions of the secondary dendrite arm spacing and the eutectic lamellar spacing,could be simulated.Through the comprehensive analysis of the multi-scale results,it can be seen that the optimized processing parameters would be promising for the complete Al-Si based alloy thin-walled shell casting quality with high-performance.