A novel method of utilizing static mixer to obtain mixing homogeneity of multi-species powders in laser metal deposition  

作　　者：Jipeng CHEN Shouchun XIE He HUANG 

机构地区：[1]School of Mechanical and Electronic Engineering,Nanjing Forestry University,Nanjing 210037,China [2]Nanjing Huirui Photoelectric Technology Co.,Ltd,Nanjing 211121,China

出　　处：《Chinese Journal of Aeronautics》2023年第1期423-433,共11页中国航空学报（英文版）

基　　金：supported by the Jiangsu Industry-university-research Institute Cooperation Project,China(No.BY2021078)。

摘　　要：Real-time mixing of multi-species powder challenges Laser Metal Deposition(LMD)of Functionally Graded Materials(FGMs).The current work proposes a novel method of using a static mixer to realize rapid,uniform multi-species powder mixing.Firstly,copper powder and 316L stainless steel powder are selected to complete the powder mixing observation experiment with Scanning Electron Microscope(SEM)and Energy Dispersive Spectrometer(EDS).Secondly,computational fluid dynamics and particle mixing simulation models are used to analyze the flow field and particle motion characteristics in the static mixer.Finally,LMD experiment and metallo-graphic observation are carried out with 316L stainless steel powder and WC powder to verify the feasibility of the static mixer.This study provides a theoretical and practical basis for powder mixing in laser processing with a static mixer.The conclusions can also be applied to other processing fields requiring real-time and uniform mixing of multi-species powders.

关 键 词：HOMOGENEITY Laser metal deposition Multi-species powder MIXING Static mixer 

分 类 号：TG1[金属学及工艺—金属学]