福州大学学报（自然科学版）2024，Vol.52Issue(4)：445-453,9.DOI:10.7631/issn.1000-2243.23277
电弧增材熔池流动特性和稳定性数值模拟
Numerical study on flow characteristics and stability of molten pool for wire and arc additive manufacturing
摘要
Abstract
In order to explore the influence of the thermal state and flow characteristics of the molten pool on the size and stability of the molten pool,a three-dimensional numerical model of the arc additive molten pool was established by using FLUENT software and secondary development.The numerical results show that the arc additive is a non-equilibrium solidification process with rapid heating and rapid cooling in the molten pool.The arc force and Marangoni effect have great influence on the flow in the molten pool,and the flow pattern in the molten pool is dominated by circulation.The effects of heat input and heat dissipation on the local temperature field and flow field in the molten pool are comprehensively analyzed.The hot state of molten pool changes the flow state and velocity of molten pool by affecting the melt viscosity and driving forces.The flow of molten pool affects the boundary of molten pool and thermal convection.Therefore,the combined effect of the two determines the molten pool geometry.The interlayer cooling can improve the heat dissipation condition of molten pool during deposition and reduce the effect of heat accumulation,but it will reduce the forming efficiency.关键词
熔池/电弧增材/热状态/流动特性/稳定性/数值模型Key words
molten pool/wire and arc additive manufacturing/thermal state/flow characteristics/sta-bility/numerical model分类
金属材料引用本文复制引用
郑忆称,刘景城,林明皇,耿海滨..电弧增材熔池流动特性和稳定性数值模拟[J].福州大学学报（自然科学版）,2024,52(4):445-453,9.基金项目
国家自然科学青年基金资助项目(51805088) （51805088）
福建省自然科学基金资助项目(2021J01563) （2021J01563）
