中南大学学报（自然科学版）2024，Vol.55Issue(3)：918-927,10.DOI:10.11817/j.issn.1672-7207.2024.03.007
锌铝合金熔融三维直写成形尺寸建模与组织分析
Modeling and microstructure analysis of three-dimension direct writing for zinc-aluminum alloy
摘要
Abstract
In order to realize the control of shape and performance of metal melting 3D direct writing process,modeling and microstructure analysis of three-dimension direct writing for zinc-aluminum alloy were carried out.Firstly,based on the minimum control unit test of zinc-aluminum alloy melt direct writing,the trace width was fitted by multiple nonlinear regression method.Forming characteristic parameter w was used as response variable in the regression analysis,and the forming parameters D and H were used as the predictive variables.Secondly,the single-track forming dimension parameter model under different process parameters was established,and the fitting degree of the model was verified.Finally,multi-phases flow model was adapted to build the coupled calculative models for direct writing deposition and solidification.Typical solidification microstructures in the forming process were analyzed.By introducing remelting preparation time tr,the process parameters with good bonding effect between layers in forming were predicted and calculated.The results show that in the single-track forming dimension parameter model,the nozzle diameter D is the first factor affecting the width of the forming channel,followed by the height of the nozzle from the forming bottom plate H.When the trace width is approximately equal to the width of the solidification layer,it is the best time to form the next layer.关键词
金属熔融直写/金属增材制造/3D打印/尺寸建模/微观组织Key words
metal melting direct writing/metal additive manufacturing/3D printing/dimension modeling/microstructure analysis分类
矿业与冶金引用本文复制引用
戎文娟,单忠德,王宝雨,王佳琳,王永威..锌铝合金熔融三维直写成形尺寸建模与组织分析[J].中南大学学报（自然科学版）,2024,55(3):918-927,10.基金项目
国家重点研发计划项目(2020YFF0217703)(Project(2020YFF0217703)supported by National Key Research and Development Program of China) （2020YFF0217703）
