冷喷涂温度对Cu-Ti_(3)AlC_(2)复合涂层微观组织及摩擦学性能的影响  

Effect of Cold Spraying Temperature on the Microstructure and Tribological Properties of Cu-Ti_(3)AlC_(2) Composite Coatings

作　　者：王慧鹏 李鹏 王喜茂 郭伟玲 马国政 王海斗[2,3] WANG Huipeng;LI Peng;WANG Ximao;GUO Weiling;MA Guozheng;WANG Haidou(School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;National Key Laboratory of Remanufacturing,Army Academy of Armored Force,Beijing 100072,China;National Engineering Research Centerfor Remanufacturing,Army Academy of Armored Force,Beijing 100072,China)

机构地区：[1]江西理工大学机电工程学院,江西赣州341000 [2]陆军装甲兵学院装备再制造技术国防科技重点实验室,北京100072 [3]陆军装甲兵学院机械产品再制造国家工程研究中心,北京100072

出　　处：《材料导报》2024年第15期207-215,共9页Materials Reports

基　　金：国家自然科学基金(52005511,52122508,52130509);十四五预研项目重点项目(ZD-302);2022年江西省研究生创新专项资金项目(YC2022-S672)。

摘　　要：为改善铜合金运动部件表面的摩擦学性能,采用冷喷涂技术在铜合金基体上制备了Cu-Ti_(3)AlC_(2)复合涂层,并探究了喷涂温度对涂层微观组织及性能的影响。使用扫描电镜(SEM)、X射线衍射仪(XRD)对涂层表面与截面微观组织进行了表征,使用电子万能试验机、纳米压痕试验仪、往复式摩擦试验机分别测试了涂层的结合强度、显微硬度和摩擦学性能。研究表明,随着喷涂温度从600℃升高至800℃,Cu-Ti_(3)AlC_(2)复合涂层内部颗粒的变形量不断增大,颗粒间结合状态明显改善,结合强度提升约4倍,孔隙率降低23%,硬度增加71%,涂层磨损率降低53%。在800℃制备的Cu-Ti_(3)AlC_(2)复合涂层表现出最优的摩擦磨损性能,对其磨损机制进行了具体分析。结果表明,适当升高喷涂温度可有效提高涂层的致密度、力学性能和耐磨性能。To improve the tribological properties of copper alloy moving part surfaces,Cu-Ti_(3)AlC_(2) composite coatings were prepared on copper alloy substrates by cold spraying technique,and the effect of spraying temperature on the microstructure and properties of the coatings was investigated.The surface and cross-sectional microstructures of the coatings were characterized using scanning electron microscopy(SEM)and X-ray diffractometer(XRD),and the bond strength,microhardness and tribological properties of the coatings were tested using an electronic universal testing machine,a nanoindentation tester and a reciprocating friction tester.It was found that as the spraying temperature increased from 600℃ to 800℃,the deformation of particles inside the Cu-Ti_(3)AlC_(2) composite coating increased,the interparticle bonding state improved significantly,the bond strength increased by about 4 times,the porosity decreased by 23%,the hardness increased by 71%,and the coating wear rate decreased by 53%.The Cu-Ti_(3)AlC_(2) composite coating prepared at 800℃ showed the optimal frictional wear performance,and the wear mechanism was specifically analyzed.The results showed that the denseness,mechanical properties and wear resistance of the coatings could be effectively improved by appropriately increasing the spraying temperature.

关 键 词：冷喷涂 铜基陶瓷复合涂层 微观结构 力学性能 摩擦学性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理]