基于分子动力学模拟的挤压铸造工艺参数研究  

Study on Process Parameters of Squeeze Casting Based on Molecular Dynamics Simulation

作　　者：邓建新[1,2] 黄海宾 王令[1,2] DENG Jianxin;HUANG Haibin;WANG Ling(Guangxi Key Lab of Manufacturing System&Advanced Manufacturing Technology,Nanning 530003,China;School of Mechanical Engineering,Guangxi University,Nanning 530003,China)

机构地区：[1]广西大学广西制造系统与先进制造技术重点实验室,广西南宁530003 [2]广西大学机械工程学院,广西南宁530003

出　　处：《热加工工艺》2025年第2期120-125,131,共7页Hot Working Technology

基　　金：国家自然科学基金项目(51965006);广西自然科学基金项目(2018GXNSFAA050111);国家金属材料近净成形工程技术研究中心重点实验室(B类)开放基金项目(2019001)。

摘　　要：挤压铸造工艺参数设计是挤压铸造的关键,目前主要通过物理实验和数值模拟来确定,成本高,效率低,不便于观察微观机理。结合分子动力学解释微观机理的独特优势,建立了基于分子动力学的挤压铸造成形机理模拟方法,构建了7075铝合金多晶体分子铸造模型,使用分子动力学软件模拟该铝合金的挤压铸造成形过程,从微观角度研究了工艺参数对铸件性能和微观结构的影响,并得到最佳工艺参数。研究结果可为挤压铸造工艺参数设计及其材料选择提供新方法,节省大量设计时间和资源。The design of squeeze casting process parameters is the key to the advantages of squeeze casting.At present,they are mainly determined by physical experiments and numerical simulations,with high cost,low efficiency and inconvenient observing the microscopic mechanism.Based on the unique advantages of molecular dynamics to explain the microscopic mechanism,a molecular dynamics-based squeeze casting forming mechanism simulation method was established,a 7075 aluminum alloy polycrystalline molecular casting model was constructed,and molecular dynamics software was used to simulate the forming process of squeeze process of the aluminum alloy;and the influence of process parameters on the performance and microstructure of castings was studied from a microscopic point of view,so that the optimal process parameters were achieved.This study result provides a new method for the design of squeeze casting process parameters and the selection of materials,which can save a lot of design time and resources.

关 键 词：挤压铸造 工艺参数 分子动力学 7系铝合金 挤压压力 

分 类 号：TG249.2[金属学及工艺—铸造]