基于响应面的FeCoCrNi高熵合金激光定向能沉积工艺参数优化  

Optimization of Process Parameters of Laser Direct Energy Deposited for FeCoCrNi High-Entropy Alloy Using Surface Methodology

作　　者：夏宏伟 刘国承 孙明[1,2] 刘阳[1,2] 周凌云 Xia Hongwei;Liu Guocheng;Sun Ming;Liu Yang;Zhou Lingyun(School of Automobile Engineering,Wuhan University of Technology,Wuhan 430070,Hubei,China;Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,Hubei,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan 430070,Hubei,China)

机构地区：[1]武汉理工大学汽车工程学院,湖北武汉430070 [2]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [3]武汉理工大学汽车零部件技术湖北省协同创新中心,湖北武汉430070

出　　处：《应用激光》2023年第4期39-46,共8页Applied Laser

基　　金：教育部创新团队发展计划资助项目(IRT_17R83);新能源汽车科学与关键技术学科创新引智基地资助项目(B17034);材料成形与模具技术国家重点实验室开放课题研究基金资助项目(P2021-018)。

摘　　要：激光定向能沉积为高熵合金提供一种柔性、快速、敏捷的制备方式,合理的单道工艺参数是保障成形顺利进行的关键。为研究FeCoCrNi高熵合金在激光定向能沉积过程中工艺参数对沉积形貌的影响,基于响应面法,研究了激光功率、送粉速率和扫描速率对稀释率和宽高比的影响规律,建立稀释率和宽高比的预测模型。结果表明,稀释率、宽高比与送粉速率呈负相关关系,与激光功率、扫描速率呈正相关关系。经试验验证,稀释率和宽高比的预测误差分别为2.29%和4.45%,所建立的模型与试验结果吻合较好。Laser directed energy deposition provides a flexible,fast,and agile processing for high-entropy alloys.Reasonable single-pass process parameters are the key to ensure processing.In order to study the influence of process parameters on the deposition morphology of FeCoCrNi high-entropy alloy in the laser directed energy deposition process,response surface methodology was used.The influence of laser power,powder feeding rate,and scanning rate on the dilution rate and aspect ratio was studied.Prediction models of dilution ratio and aspect ratio were established.The results show that the dilution rate and aspect ratio are negatively correlated with powder feeding rate,and positively correlated with laser power and scanning rate.The experimental results indicate that the prediction errors of dilution ratio and aspect ratio are 2.29%and 4.45%respectively,and the established models are in good agreement with experiments.

关 键 词：高熵合金 定向能沉积 FeCoCrNi 响应面 工艺参数 

分 类 号：TG456.7[金属学及工艺—焊接]