激光熔覆-离子渗硫层干摩擦学性能  

Tribological performance of laser cladding/ion sulfurizing composite coatings under dry friction condition

作　　者：韩彬[1,2] 崔娜 齐从华 张蒙科 王勇 

机构地区：[1]中国石油大学(华东)机电工程学院,山东青岛266580 [2]国家采油装备工程技术研究中心,山东东营257091

出　　处：《材料热处理学报》2015年第10期193-198,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51179202);国家863计划项目(2012AA09A203);清华大学摩擦学国家重点实验室开放基金(SKLTKF13B04);青岛市科技发展指导计划项目(KJZD-12-44-jch)

摘　　要：采用激光熔覆-离子渗硫复合新工艺在45钢表面制备减磨耐磨性能良好的自润滑涂层。采用扫描电子显微镜、原子力显微镜、白光共焦三维轮廓仪、X射线衍射仪、X射线光电子能谱仪分析涂层及磨损表面的形貌、成分及相组成。在球盘式摩擦磨损实验机上对比研究渗硫前后熔覆层在干摩擦条件下的摩擦磨损性能。结果表明,采用离子渗硫在高硬度镍基合金激光熔覆层表面生成了硫化物固体润滑膜层,渗硫层表面疏松多孔,与熔覆层结合紧密;经渗硫处理后激光熔覆层的耐磨减摩性能提高,对磨件的磨损也明显改善;磨损表面生成了由硫化物和氧化物组成的边界润滑膜。A self-lubrication layer with excellent anti-friction and wear resistance was prepared on surface of 45 steel by laser cladding and ion sulfurizing composite technology. Morphology and composition of the composite layer and worn surface were studied by means of SEM,EDS analysis,AFM,Micro XAM-3D and XRD. The tribological properties of the composite layer were investigated using a ball-on-disc wear tester under dry conditions. The results show that the sulfide layer is produced on the surface of high hardness Ni-based alloy laser cladding layer by ion sulfurizing. The sulfide layer is loose and porous,which is bonded well with the laser cladding layer. After sulfurizing process,the friction-reducing and wear-resistant performances of the cladding layer are significantly improved as well as its wear part. A boundary lubrication film composed of sulfide and oxide is formed on the worn surface.

关 键 词：激光熔覆 离子渗硫 硫化物 减摩 耐磨 

分 类 号：TG156.8[金属学及工艺—热处理]