热喷涂工艺对NiCrFeAl/hBN复合涂层性能的影响  

Effect of thermal spraying process on properties of NiCrFeAl/hBN composite coating

作　　者：周子民 熊声健 陈皓晖 李彰 王长亮 郭孟秋 崔秀芳[2] 金国[2] Zhou Zimin;Xiong Shengjian;Chen Haohui;Li Zhang;Wang Changliang;Guo Mengqiu;Cui Xiufang;Jin Guo(Aviation Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material,AECC Beijing Institution of Aeronautical Materials,Beijing 100095,China.;College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin Heilongjiang 150001,China;Unit 32382 of the PLA,Beijing 100072,China)

机构地区：[1]中国航发北京航空材料研究院航空材料先进腐蚀与防护航空科技重点实验室,北京100095 [2]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001 [3]中国人民解放军32382部队,北京100072

出　　处：《金属热处理》2022年第6期208-215,共8页Heat Treatment of Metals

基　　金：国家科技重大专项(2017-VII-0012-0109);国家自然科学基金(52075508);北京市科技新星培养计划(Z191100001119040)。

摘　　要：为提升氧乙炔火焰喷涂NiCrFeAl/hBN复合涂层的力学性能,对氧乙炔火焰喷涂的氧燃比、喷枪速度及喷涂间距等3个主要参数,采用L_(9)(3^(4))正交试验方法,以涂层的表面洛氏硬度和结合强度性能为主要判定指标分析了不同工艺参数的影响主次关系,对最优工艺制备涂层性能进行了验证。结果表明,喷涂间距是影响涂层性能的主要因素,最优工艺参数为氧燃比(O_(2)/C_(2)H_(2))26/20,枪速600 mm/s,间距12 mm,涂层内部组织更为均匀、熔融结合较好,表面平整、未熔颗粒较少,涂层平均结合强度高达10.3 MPa,表面平均洛氏硬度为54.9 HR15Y。In order to improve the mechanical properties of oxyacetylene flame sprayed NiCrFeAl/hBN composite coating,L_(9)(3^(4))orthogonal test method was used and taking the surface Rockwell hardness and bonding strength as the main judgment indexes,the influence order of the three main parameters(oxygen-fuel ratio,spraying speed,spraying spacing)of oxyacetylene flame spraying were analyzed,and the performance of the coating prepared by the optimal process was verified.The results show that the spraying spacing is the main factor affecting the performance of the coating,and the optimal process parameters are O_(2)/C_(2)H_(2) of 26/20,spraying speed of 600 mm/s,spraying spacing of 12 mm,which lead to more uniform internal structure of the coating,better melting bonding,smooth surface,less unmelted particles,and the average bonding strength of the coating is up to 10.3 MPa,the average surface Rockwell hardness is 54.9 HR15Y.

关 键 词：氧乙炔火焰喷涂 NiCrFeAl/hBN涂层 正交试验 表面洛氏硬度 结合强度 

分 类 号：TG174.4[金属学及工艺—金属表面处理]