工艺参数对氩弧熔覆TiC+Al_(2)O_(3)/Ni复合涂层稀释率及显微硬度的影响  

Effect of Process Parameters on Dilution Rate and Microhardness of Argon Arc Cladding TiC+Al_(2)O_(3)/Ni Composite Coating

作　　者：李思捷 孟君晟 陈志辉 郝晨帆 李钦东 LI Sijie;MENG Junsheng;CHEN Zhihui;HAO Chenfan;LI Qindong(School of Naval Architecture and Port Engineering,Shandong Jiaotong University,Weihai 264200,China)

机构地区：[1]山东交通学院船舶与港口工程学院,威海264200

出　　处：《机械工程材料》2024年第10期35-40,共6页Materials For Mechanical Engineering

基　　金：山东省自然科学基金资助项目(ZR2020KF024);浙江省水利水电装备表面工程技术研究重点实验室开放课题资助(20240302);山东省大学生创新创业训练计划项目(S202311510154,S202311510210,S202311510274);山东交通学院研究生科技创新项目(2024YK103)。

摘　　要：采用氩弧熔覆工艺制备了TiC+Al_(2)O_(3)/Ni复合涂层,通过四因素四水平正交试验,研究了熔覆电流(100,110,120,130A)、熔覆速度(1,2,3,4mm·s^(-1))、电弧长度(1,2,3,4mm)和氩气流量(8,10,12,14L·min^(-1))对涂层稀释率和显微硬度的影响,获取最佳工艺参数,并对比分析了不同工艺参数下涂层的物相组成和显微组织。结果表明:稀释率和显微硬度的最主要影响因素分别为熔覆速度和熔覆电流;随着熔覆速度增大,稀释率减小,显微硬度先增大后减小;随着熔覆电流增加,稀释率增大,显微硬度先增大后减小;随着电弧长度增加,稀释率减小,显微硬度先减小后增大;氩气流量对稀释率和显微硬度的影响较小;最佳熔覆工艺参数为熔覆电流120A,熔覆速度2mm·s^(-1),电弧长度2mm,氩气流量12L·min^(-1),此条件下制备的涂层组织细小且均匀,显微硬度最大,为680.9HV。TiC+Al_(2)O_(3)/Ni composite coating was prepared by argon arc cladding.Four factors and four levels orthogonal test were designed.The effect of cladding current(100,110,120,130 A),cladding velocity(1,2,3,4mm·s^(-1)),arc length(1,2,3,4 mm) and argon flow rate(8,10,12,14 L·min^(-1)) on coating dilution rate and microhardness was studied,and the optimal process parameters were obtained.The phase composition and microstructure of the coating under different process parameters were compared and analyzed.The results show that the main influencing factors of dilution rate and microhardness were cladding velocity and cladding current,respectively.With the increase of the cladding velocity,the dilution rate decreased,and the microhardness increased first and then decreased.With the increase of cladding current,the dilution rate increased,and the microhardness increased first and then decreased.With the increase of arc length,the dilution rate decreased and the microhardness first decreased and then increased.Argon flow rate had little effect on the dilution rate and microhardness.The optimal cladding parameters were as follows:cladding current of 120 A,cladding speed of 2 mm·s^(-1),arc length of 2 mm,argon flow of 12 L·min^(-1).The microstructure of the coating prepared under optimal parameters was fine and uniform,and the microhardness reached the maximum of 680.9 HV.

关 键 词：氩弧熔覆 工艺参数 复合涂层 稀释率 显微硬度 

分 类 号：TG174.4[金属学及工艺—金属表面处理]