激光熔覆粉末汇聚特性对熔覆层高的影响研究  

Influence of Convergence Characteristics of Laser Cladding Powder FlowField on Cladding Layer Height

作　　者：郭钢 赵冬梅[1] 乌日开西·艾依提[1] 贾儒[1] Guo Gang;Zhao Dongmei;Wurikaixi Aiyiti;Jia Ru(School of Intelligent Manufacturing Modern Industry(School of Mechanical Engineering),Xinjiang University,Urumqi 830017,Xinjiang,China)

机构地区：[1]新疆大学智能制造现代产业学院(机械工程学院),新疆乌鲁木齐830017

出　　处：《激光与光电子学进展》2023年第21期200-206,共7页Laser & Optoelectronics Progress

基　　金：新疆维吾尔自治区高校科研计划自然科学项目(XJEDU2021I008)。

摘　　要：为研究不同载气流量和不同送粉量下激光熔覆粉末流场的汇聚特性对熔覆层高的影响,采用Fluent软件建立了气固两相流模型,对不同载气流量和不同送粉量下粉末流场的汇聚特性进行了模拟,并对模型进行了试验验证。结果表明,随着载气流量增大,喷嘴出口粉末流场的发散程度增大,粉末汇聚浓度降低。随着送粉量的增大,喷嘴出口粉末浓度场增大,粉末汇聚浓度增大,两种情况汇聚位置均无变化,在试验参数中载气流量和送粉量分别为7 L/min和1.2 r/min时粉末汇聚最好,熔覆层高最高。最后通过试验验证,模拟结果和试验结果相一致,说明了该模型的准确性。This study investigates the impact of powder flow field convergence characteristics on layer height under different carrier gas flow rates and powder feeding amounts.A gas-solid two-phase flow model was developed using Fluent software and used to simulate the convergence characteristics of the powder flow field under different carrier gas flow rates and powder feeding amounts.The model was validated through experimental testing.The results show that as the carrier gas flow rate increases,the dispersion of the powder flow field at the nozzle outlet also increases and the powder convergence concentration decreases.In addition,as the powder feeding amount increases,the powder concentration field at the nozzle outlet and convergence concentration increase,while the convergence position remains unchanged.The model was found to be accurate as the simulation results were consistent with the experimental results.

关 键 词：激光熔覆 数值模拟 气固两相流 汇聚特性 粉斑直径 工艺参数优化 

分 类 号：TG456.7[金属学及工艺—焊接]