高速电弧喷涂FeNiCr/Ni包覆Cr_3C_2涂层组织和性能的研究  

Study on microstructure and properties of FeNiCr/Ni coated Cr_3C_2 coatings deposited by high velocity arc spraying

作　　者：罗来马[1] 刘少光 俞佳[1] 罗娟[1] 刘永莉[3] 郦剑[1] 

机构地区：[1]浙江大学材料系,浙江杭州310027 [2]温州科得力新特材料有限公司,浙江温州325029 [3]江苏科技大学材料科学与工程学院,江苏镇江212003

出　　处：《功能材料》2009年第8期1285-1287,1296,共4页Journal of Functional Materials

摘　　要：通过常温超声波辅助化学镀方法制备Ni包覆Cr3C2陶瓷粉体,以其作为增强相的粉芯材料通过高速电弧喷涂制备FeNiCr/Ni包覆Cr3C2涂层。采用光学显微分析、场发射扫描电镜分析(FE-SEM)、能谱分析(EDS)以及显微硬度测试方法,研究Ni包覆Cr3C2陶瓷粉体对涂层组织结构及性能的影响。试验结果表明:Ni包覆Cr3C2陶瓷粉体能改善涂层中各相之间的结合状态,显著减少涂层的氧化物和孔隙率,并提高涂层与基体的结合强度、抗热震性和抗高温冲蚀性能。Ultrasonic assistant electroless plating was used to prepare Ni coated Cr3C2 powders at room temperature. Ni coated Cr3C2 powders were used as reinforcing phase in core wires. FeNiCr/Ni coated Cr3C2 coating was deposited on grade 20 steel substrates by high velocity arc spraying. The effect of Ni coated Cr3C2 powders on microstructure and properties of the coatings were studied by optical microscopy, field emission scanning electron microscopy （FE-SEM）, energy dispersion spectrum （EDS） and micro-hardness measurement. The resuits show that FeNiCr/Ni coated Cr3 C2 coating has less porosity and oxide rate, denser contact and the bonding strength between the lamellae of the coatings than those of FeNiCr/Cr3C2 coating. The bond strength to the substrate, thermal shock resistance and high-temperature erosion resistance of FeNiCr/Ni coated Cr3C2 coating are significantly improved compared to those of FeNiCr/Cr3C2 coating.

关 键 词：Ni包覆Cr3C2陶瓷粉体 高速电弧喷涂 抗热震性能 抗高温冲蚀磨损性能 

分 类 号：TG174[金属学及工艺—金属表面处理]