侧向送丝激光熔覆修复轧辊工艺研究  

Study on Repair Technology for Roller with Lateral Wire-fed Laser Cladding

作　　者：章泽豪 刘继常[1] ZHANG Zehao;LIU Jichang(Engineering Research Center of Green Remanufacturing Technology for Machinery Equipment of Hu′nan Province,College of Machanical and Vehicle Engineering,Hu′nan University,Changsha 410082,China;Hu′nan Jiacheng Additive Manufacturing Co.,Ltd.,Changsha 410323,China)

机构地区：[1]湖南大学机械与运载工程学院,湖南省机械装备绿色再制造工程技术研究中心,湖南长沙410082 [2]湖南嘉程增材制造有限公司,湖南长沙410323

出　　处：《电加工与模具》2022年第3期39-44,共6页Electromachining & Mould

基　　金：湖南省科技创新平台与人才计划项目(2018TP2002);长沙市科技计划项目(kq1907111)。

摘　　要：针对基底为45钢的轧辊进行侧向送丝激光熔覆修复工艺研究。采用正交试验法进行单道侧向送丝激光熔覆修复工艺试验,利用灰色关联分析法对工艺参数进行多目标优化,得到侧向送丝激光熔覆修复最优工艺参数组合为激光功率2200 W、扫描速度4.5 mm/s、送丝速度45 mm/s。通过多道侧向送丝激光熔覆试验研究,得到最优搭接率为30%,该搭接率下熔覆层形貌良好,无明显缺陷;熔覆层组织以马氏体为主,熔覆层横截面的横向和纵向显微硬度均呈周期性变化,表层硬度约为550HV。The repair technology with the lateral wire-fed laser cladding on the surface of 45-steel substrate of roll was studied.The orthogonal test method was used in single-pass lateral wire-fed laser cladding,and grey correlation analysis was used to optimize the process parameters of single-pass lateral wire-fed laser cladding.The result showed that the optimal combination of process parameters is 2200 W of laser power,4.5 mm/s of scanning speed and 45 mm/s of wire feeding speed.Through the multi-pass laser cladding test,it was found that the optimal overlap ratio was 30%.Under this ratio,the cladding layer has a good morphology and no obvious defects,and the microstructure of cladding layer is mainly martensite.The transverse and longitudinal microhardness of the cross section of the cladding layer changes periodically,while the surface hardness is about 550HV.

关 键 词：激光熔覆 侧向送丝 轧辊修复 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]