超级13Cr表面Cr-Y共渗层的组织与摩擦磨损性能  

Microstructure and Wear Resistance of Cr-Y Co-deposition Coating on Super 13Cr

作　　者：李涌泉[1] 余斌高[1] 

机构地区：[1]西安航空学院,陕西西安710077

出　　处：《热加工工艺》2014年第14期115-117,122,共4页Hot Working Technology

基　　金：陕西省科技攻关项目(2011K01-01)

摘　　要：通过950℃下Cr-Y2O3扩散共渗5 h的方法在超级13Cr表面制备了Cr-Y共渗层,采用SEM、EDS和XRD分析了共渗层的结构及相组成,并对超级13Cr基体及共渗层的常温耐磨性进行了研究。结果表明:950℃下共渗5 h所制备的Cr-Y共渗层具有沉积+扩散分布的特征,渗层主要由Cr23C6、Cr7C3和CrFe7C0.45组成;在试验条件下,Cr-Y共渗层的耐磨性均明显优于超级13Cr基体,其磨损质量损失仅为基体的1/15,超级13Cr基体的磨损机理为犁削磨损和磨粒磨损;Cr-Y共渗层的磨损为GCr15在其表面的单向转移。Cr-Y co-deposition coating on super 13 Cr was prepared by pack cementation processes at 950 ℃ for 5 h.Surface morphologies, microstructure and phase constitutions of the coating were analysed by SEM, EDS and XRD.Friction-wear tests of the super 13 Cr substrate and the coating were studied in air at normal temperature. The results show that the coating prepared by co-depositing Cr-Y has obvious deposition and diffusion distribution characteristics. The coating mainly consists of Cr23C6, Cr7C3 and CrFe7C0.45. Under the experimental condition, the wear mass loss of Cr-Y coating is only1/15 as much as that of super 13 Cr, and the wear resistance increases significantly. The wear mechanism of super 13 Cr is grinding abrasion and grain-abrasion. The wear mechanism of Cr＋Y coating is transfer of GCr15 on its surface.

关 键 词：超级13Cr Cr-Y共渗层 组织结构 摩擦磨损 

分 类 号：TG174.44[金属学及工艺—金属表面处理]