纳米稀土对热喷涂WC-12Co涂层的改性作用  

Effect of rare earth on WC-12Co coatings prepared by thermal spraying

作　　者：周红霞[1] 王亮[1] 彭飞[1] 王铀[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《材料热处理学报》2009年第2期162-166,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助(59895150)

摘　　要：利用超音速火焰喷涂技术在45钢基体上制备了不同纳米稀土含量的WC-12Co涂层。通过物相分析并测定材料的显微硬度、结合强度、磨损性能,研究纳米稀土对WC-12Co涂层的改性作用。结果表明:适量纳米稀土的加入使WC-12Co涂层的显微硬度和结合强度显著提高,并且纳米稀土的加入有效地抑制了WC颗粒的脱碳,使组织细化。当纳米稀土含量在1.5wt%时,涂层的耐磨性最好。WC-12Co coatings with different content of nano-sized rare earth were prepared by high velocity oxy-fuel thermal spray （HVOF） on 45 steel substrate. In order to study the effect of nano-sized rare earth on WC-12Co coating, microhardness, bonding strength and wear resistance of the coatings were tested, and XRD analysis was carried out. The results show that appropriate nano-sized rare earth can greatly improve the coating hardness and bonding strength, and it can also restrain decarburization of WC particles, make the microstructure fine. The coating with 1.5wt% nano-sized rare earth presents the best wear resistance.

关 键 词：超音速喷涂 WC-12CO涂层 纳米稀土改性 耐磨性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]