0Cr18Ni9钢表面等离子铌合金化层的显微组织和摩擦磨损性能  

Microstructure and Friction and Wear Properties of Plasma Niobium Surface Alloying Layer on 0Cr18Ni9 Steel

作　　者：谢燕翔[1] 王振霞[1] 刘俊[1] 贺志勇[1] 

机构地区：[1]太原理工大学表面工程研究所,太原030024

出　　处：《机械工程材料》2010年第11期61-64,共4页Materials For Mechanical Engineering

基　　金：太原市科技项目大学生创新创业专项(08122087);太原理工大学青年基金资助项目;山西省基础研究青年科技研究基金资助项目(2008012008-3);山西省研究生优秀创新项目(20081042)

摘　　要：采用双辉等离子渗金属技术在0Cr18Ni9奥氏体不锈钢表面制备出厚度为22μm均匀致密的渗铌合金化层;分析了合金化层的成分、显微组织及其摩擦磨损性能。结果表明:铌合金化层主要由铌的碳化物(NbC、Nb6C5)和金属间化合物(Cr2Nb、Fe2Nb)组成,表面硬度较基体提高一倍左右,达到614 HV0.025;合金化层的摩擦因数(8.05×10-2)与基体的(7.97×10-2)基本相同;基体和合金化层均以粘着磨损和磨粒磨损为主要磨损形式,合金化层的磨损率较基体的明显降低。A uniform and compact niobium alloying layer with the thickness of 22 μm was prepared on the 0Cr18Ni9 austenitic stainless steel surface using double-glow plasma surface alloying technology.The composition,microstructure and tribological properties of the alloying layer were examined.The results show that the Nb alloying layer was mainly composed of Nb-containing carbides（NbC,Nb6C5） and intermetallic compounds（Cr2Nb,Fe2Nb）.The surface hardness of the alloying layer enhanced by one time compared with that of the substrate,which reached 614 HV0.025.The friction coefficient of the Nb alloying layer（8.05×10-2） and the substrate（7.97×10-2） were roughly same.The main wear mode of both the substrate and alloying layer was a mixture of adhesion and abrasion.The wear rate of the alloying layer decreased obviously compared with that of the substrate.

关 键 词：奥氏体不锈钢 渗铌合金化层 摩擦磨损性能 

分 类 号：TG142.7[一般工业技术—材料科学与工程]