电弧离子镀NiCoCrAlYTa涂层制备及其高温防护性能研究  

Preparation and High Temperature Protection Performance of NiCoCrAlYTa Coating by Arc Ion Plating

作　　者：黄艳松 林松盛 石倩 代明江 郑彩凤 云海涛 谌曲平 汪云程 HUANG Yansong;LIN Songsheng;SHI Qian;DAI Mingjiang;ZHENG Caifeng;YUN Haitao;CHEN Quping;WANG Yuncheng(Military Representative Office of naval equipment department in Changsha,Zhuzhou 412000,Hunan,China;Institute of New Materials,Guangdong Academy of Sciences,National Engineering Laboratory of Modern Materials Surface Engineering Technology,Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology,Guangzhou 510651,China;Aecc South Industry Company Limited,Zhuzhou 412000,Hunan,China)

机构地区：[1]海军装备部驻长沙地区军事代表室,湖南株洲412000 [2]广东省科学院新材料研究所现代材料表面工程技术国家工程实验室广东省现代表面工程技术重点实验室,广州5106511 [3]中国航发南方工业有限公司,湖南株洲412000

出　　处：《真空与低温》2021年第5期417-422,共6页Vacuum and Cryogenics

基　　金：广东省特支计划团队项目(2019BT02C629)。

摘　　要：为进一步提升高温合金材料的服役性能,利用真空阴极电弧离子镀技术在DZ22B高温合金上沉积NiCoCrAlYTa涂层,研究涂层对基材力学性能的影响和高温性能等。采用扫描电镜观察膜层表面和截面形貌,用X射线衍射仪分析涂层的物相组成,用万能试验机检测室温拉伸性能和高温光滑持久强度性能。结果表明:所沉积的NiCoCrAlYTa涂层厚度达60μm以上,经热处理后,涂层更加致密且与基体因互扩散实现了冶金结合;NiCoCrAlYTa涂层的相组织主要为γ′-Ni3Al/γ-Ni。表面沉积NiCoCrAlYTa涂层后,对DZ22B基材的室温拉伸性能和高温光滑持久强度性能虽稍有影响,但均能满足应用的要求。在1050℃高温下,NiCoCrAlYTa涂层表面形成了一层致密的氧化层,从而减缓了氧化速度,其氧化速度仅为DZ22B基材的50%;DZ22B基材表面沉积NiCoCrAlYTa涂层后,抗950℃燃气热腐蚀能力提高了225倍。In order to improve the service performance of superalloy,NiCoCrAlYTa coatings were deposited on DZ22B superalloy by cathode arc ion plating.Scanning electron microscopy was used to observe the surface and section morphology of the coatings,X-ray diffraction was used to analyze the phase composition of the coating,The tensile strength at room temperature was tested by universal testing machine,and the high temperature endurance strength was tested by high temperature durability testing machine.The results show that the thickness of NiCoCrAlYTa coating is more than 60μm,After heat treatment,the coating is more compact,and metallurgical bonding is obtained between the coating and the substrate due to element diffusion.The phase structure of NiCoCrAlYTa coating is mainly composed ofγ′-Ni3Al/γ-Ni.NiCoCrAlYTa coating has little effect on the room temperature tensile properties and high temperature smooth endurance properties of DZ22B substrate,but it can meet the application requirements.At 1050℃,a dense oxide layer was formed on the surface of NiCoCrAlYTa coating,which slows down the oxidation rate.The oxidation rate of the coating is half of DZ22B substrate.After coated with NiCoCrAlYTa coating of DZ22B substrate,the resistance of gas hot-corrosion at 950℃was increased by 225 times.

关 键 词：NICOCRALYTA涂层 电弧离子镀 抗高温氧化 热腐蚀 高温合金 

分 类 号：TG174[金属学及工艺—金属表面处理]