热处理对Cu–10Al–X热喷涂涂层组织与性能的影响  

Effect of heat treatment on microstructure and properties of thermally sprayed Cu–10Al–X coating

作　　者：钟国明[1] 曾鹏[1] 李东强[1] 谢光荣[1] 段水旺[1] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《电镀与涂饰》2016年第14期759-764,共6页Electroplating & Finishing

基　　金：省部产学研结合项目(2012B091100389)

摘　　要：在45钢基体上用氧-乙炔火焰热喷涂Cu–10Al–X粉末制备了高铝青铜涂层,并通过不同的热处理工艺对其进行强化。用显微硬度计、能谱仪、X射线衍射仪、扫描电镜、激光共聚焦显微镜和材料表面性能综合测试仪考察了热处理对涂层显微组织、物相与性能的影响。结果表明,经过600°C/0.5 h固溶强化与400°C/1 h时效强化后,高铝青铜涂层出现了Cu_9Al_4、CuAl、CuAl_2、Cu_3Al等金属间化合物,以Al_(65)Cu_(20)Fe_(15)、AlFe为代表的硬度较高的k相和Al_2O_3致密氧化膜,硬度和耐磨性得到了较大的改善。A high-aluminum bronze coating was prepared with a Cu-10Al-X powder by oxygen-acetylene flame spraying on 45 steel substrate, and then strengthened by different heat treatment processes. The effect of heat treatment on microstructure, phase composition and properties of the coating were studied using microhardness meter, energy-dispersive spectrometer, X-ray diffractometer, scanning electron microscope, laser scanning confocal microscope and material surface comprehensive performance tester. The results showed that some intermetallic compounds such as CupAl4, CuAl, CaAl2 and Cu3Al, high- hardness k phases including AlFe and Al65Cu20Fe15, and compact Al2O3 film appear in the high-aluminum bronze coating after solid solution hardening at 600 ℃ for 0.5 h and aging strengthening at 400 ℃ for 1 h, leading to a high improvement in hardness and wear resistance.

关 键 词：钢 高铝青铜 热喷涂 热处理 固溶强化 时效强化 硬度 耐磨性 

分 类 号：TG156.1[金属学及工艺—热处理]