Ni-20Al丝材制备及涂层微结构特征研究  

Preparation of Ni-20Al Wire and Microstructural Characteristic of the Related Coatings

作　　者：路洋 闫泽 周正[1] 王彦军 苗小锋 冀晓鹃 贺定勇[1] 汪云程 Lu Yang;Yan Ze;Zhou Zheng;Wang Yanjun;Miao Xiaofeng;Ji Xiaojuan;He Dingyong;Wang Yuncheng(Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124;AVIC Manufacturing Technology Institute,Beijing 100024;BGRIMM Technology Group,Beijing 100160;AECC South Industry Co.,Ltd.,Zhuzhou 412002)

机构地区：[1]北京工业大学材料与制造学部,北京100124 [2]中国航空制造技术研究院,北京100024 [3]矿冶科技集团有限公司,北京100160 [4]中国航发南方工业有限公司,株洲412002

出　　处：《热喷涂技术》2022年第3期64-73,共10页Thermal Spray Technology

摘　　要：开发了三种不同结构的Ni-20Al丝材,对其火焰喷涂工艺性和涂层微结构特征等进行分析,并与商用Metco 405NS丝材及所制备的涂层进行了对比。结果表明,丝材结构影响了火焰加热时热量由丝材表面向芯部的传导,导致丝材熔化状态产生显著差异,进而决定了喷涂焰流的稳定性以及相关涂层组织的均匀性。其中,采用轧制拉拔包丝技术制备的Ni-20Al丝材,呈现出优异的喷涂工艺稳定性,所制备的涂层组织均匀,平均显微硬度和结合强度分别可达348.3 HV_(0.05)、62 MPa,与405NS丝材制备涂层性能基本一致,具备了较好的应用潜力。Three kinds of Ni-20Al wire with different structures were developed. The fame spraying suitability of three wires and the microstructural characteristics of related coatings were investigated, in comparison with the commercial 405NS wire and coatings. The results showed that the structure of Ni-20Al wire affected the heat transfer within wires during flame spraying, leading to significant differences in the melting state of the wires, which determined the stability of spraying process and the uniformity and microstructure of the related coatings. Consequently, the Ni-20Al wire prepared by rolling-drawing process with solid Ni wire flled exhibited an excellent stability during spraying process. The as-deposited coating depicted uniform microstructure with an average microhardness of 348.3 HV_(0.05)and a bonding strength of 62 MPa, which were in accordance with the coatings prepared by spraying 405NS wire. Therefore, the developed Ni-20Al wire here presented a great potential in application.

关 键 词：Ni-20Al丝材 火焰喷涂 微观组织结构 

分 类 号：TG174.4[金属学及工艺—金属表面处理]