金属熔滴连续沉积、凝固重叠工艺及实验验证（英文）  

Experimental Investigation of the Overlap Process in Metal Droplet Successive Deposition and Solidification

作　　者：李素丽[1] 魏正英[1] 杜军[1] 赵光喜[1] 王鑫[1] 卢秉恒[1] 

机构地区：[1]西安交通大学机械制造系统工程国家重点实验室,陕西西安710049

出　　处：《稀有金属材料与工程》2017年第12期3645-3650,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(31370944);Natural Science Foundation of Shaanxi Province(2014JQ7238);China Postdoctoral Science Foundation(2014M560764)

摘　　要：系统研究了铝熔滴连续沉积到基板表面的瞬态传热传质现象,采用流体体积法(VOF)对连续沉积的金属熔滴在水平固定铝基板表面沉积进行3D建模。针对凝固传热过程中不同参数下熔滴在铝基板表面沉积、凝固进行了研究,通过数值计算与实验验证,各种工艺参数的影响,如喷射速度、基板温度、熔滴直径与碰撞最大铺展因子的影响,显示了很好的一致性。基于上述研究,成形形貌和内部微观结构之间的定量关系进一步验证了金属熔滴连续沉积、凝固重叠工艺的可行性。此工艺为金属微沉积制造实施有效的过程控制提供指导。This paper presents a systematic numerical and experimental investigation of the transient transport phenomenon during the overlap of successive aluminum droplets impinging onto a substrate surface.The 3D models based on a volume of fluid（VOF） method were developed to investigate the successive deposition of molten metal droplets on a horizontally fixed aluminum substrate surface.The numerical models are validated with experiments.The comparisons between numerical simulations and experimental findings show a good agreement.The effects of various parameters such as impact velocities,substrate temperatures and droplet diameters on the maximum spread factor during impacting and spreading with solidification of a molten droplet onto an aluminum substrate surface under different parameters were studied.Based on the above research,the relationships between external morphology and internal microstructure were proposed,which was further certified by investigating the overlap of successive droplets.

关 键 词：金属铝液滴 连续沉积 成形形貌 内部微观结构 

分 类 号：TG146.21[一般工业技术—材料科学与工程]