铝合金粉末雾化过程数值模拟及实验研究  

Numerical Simulation and Experimental Study on Atomization Process of Aluminum Alloy Powder

作　　者：刘英杰 胡强 赵新明[2,3] 张少明 Liu Yingjie;Hu Qiang;Zhao Xinming;Zhang Shaoming(Technical Research Institute of Metal Powder Material Industry,GRIPM Advanced Materials Co.,Ltd,Beijing 101407,China;GRINM Additive Manufacturing Technology Co.,Ltd,Beijing 101407,China;Beijing General Research Institute for Nonferrous Metals,Beijing 100088,China)

机构地区：[1]有研粉末新材料股份有限公司金属粉体材料产业技术研究院,北京101407 [2]有研增材技术有限公司,北京101407 [3]北京有色金属研究总院,北京100088

出　　处：《稀有金属材料与工程》2024年第10期2913-2925,共13页Rare Metal Materials and Engineering

基　　金：国家重点研发计划(2021YFB3701201);北京市科技计划(Z221100005822002)。

摘　　要：采用数值模拟和实验验证相结合的方法研究铝合金粉末雾化过程,系统地对熔体在不同盘形表面铺展运动特性和熔体薄液膜的破碎规律,以及破碎后形成液滴的飞行冷却情况进行研究,结果表明:球形盘表面液膜相对于盘面的滑移更小,液膜铺展得更均匀,盘面的传热更稳定,相同工况下球形盘连续液膜边界直径相比增加了约40%,最大液膜速度增加约19%,雾化液滴中位径D_(50)减小约12.3%,液滴粒径分布更为集中,对粉末粒径及粒度分布的控制更高效。Numerical simulation and experimental verification were used to study the atomization process of aluminum alloy powder by high-speed rotating disk.The spreading motion characteristics of melt on different disk surfaces,the breaking law of melt thin liquid film,and the flight cooling of droplets formed after crushing were investigated.The results show that the slip of liquid film on the surface of the spherical disk is smaller,the liquid film spreads more evenly,and the heat transfer of the disk is more stable.Under the same working conditions,the continuous liquid film boundary diameter of the spherical disk increases by about 40%,the maximum liquid film velocity increases by about 19%,the median diameter D_(50) of atomized droplets decreases by about 12.3%;meanwhile,the droplet size distribution is more concentrated.The size and distribution of atomized droplets can be controlled more efficiently.

关 键 词：增材制造 旋转高速雾化 铝合金粉末 数值模拟 

分 类 号：TF123.23[冶金工程—粉末冶金] TG146.21[冶金工程—冶金物理化学]