生物质锅炉管道耐腐蚀涂层的力学性能  

Mechanical properties of corrosion-resistant coatings of biomass boiler pipes

作　　者：罗来马[1,2] 刘少光[3,4] 郦剑[2] 刘永莉[4] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]浙江大学材料系,浙江杭州310027 [3]温州科得力新特材料有限公司,浙江温州325029 [4]江苏科技大学材料学院,江苏镇江212003

出　　处：《材料热处理学报》2011年第3期148-152,共5页Transactions of Materials and Heat Treatment

基　　金：浙江省科技厅一般工业项目(2009C31129)

摘　　要：采用高速电弧喷涂技术在20钢表面制备FeNiCrTi涂层。结合显微组织、显微硬度、扫描电镜分析、能谱分析、X射线衍射等分析方法对涂层的组织结构、力学性能及拉伸断口形貌进行研究分析。结果表明:FeNiCrTi涂层主要由固溶相的凝片叠加组成,中间夹杂着氧化物相、未熔颗粒相和孔隙;涂层具有较高的显微硬度和内聚强度,以及良好的抗热震性能。拉伸断口的微观特征为:固溶相的韧性韧窝特征、叠层间凝片分离脱开、未熔颗粒整体拔出。FeNiCrTi coatings were deposited on 20 steel substrate by high velocity arc spraying.Microstructure,mechanical properties and tensile fracture behavior of the coatings were studied and analyzed by means of optical microscopy（OM）,micro-hardness test,scanning electron microscopy（SEM） with energy dispersire spectrometer（EDS） and X-ray diffraction（XRD）.The results show that FeNiCrTi coatings exhibit laminated microstructure which consists of Fe-Ni solid solution,oxide phase,un-melted particles and pores.FeNiCrTi coatings have relatively high micro-hardness,high strength and excellent thermal shock resistance.The tensile fracture of the coatings is characterized by ductile dimples of solid solution phases,separation of laminated structure and pull-out of un-melted particles.

关 键 词：FeNiCrTi涂层 组织结构 抗热震性 内聚强度 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TK224.9[金属学及工艺—金属学]