WS_2含量对钛合金激光熔覆自润滑耐磨复合涂层的影响  

Effect of Different Addition of WS_2 on Laser Clad Self-Lubrication Anti-Wear Composite Coatings on Titanium Alloy

作　　者：吴少华[1] 石皋莲[1] 刘海青[2] 段业宽 孟祥军[2] 刘秀波[2] 

机构地区：[1]苏州工业职业技术学院,江苏苏州215104 [2]苏州大学机电工程学院,江苏苏州215006

出　　处：《应用激光》2014年第2期95-100,共6页Applied Laser

基　　金：江苏省自然科学基金资助项目(项目编号:BK20131155);苏州市科技计划资助项目(项目编号:SYG201349);江苏省材料摩擦学重点实验室开放基金资助项目(项目编号:Kjsmcx201301)

摘　　要：以NiCr/Cr3C2-10%WS2、NiCr/Cr3C2-20%WS2、NiCr/Cr3C2-30%WS2合金粉末为原料,采用激光熔覆技术在Ti-6Al-4V合金表面制备了γ-NiCrAlTi/TiC+TiWC2/CrS+Ti2CS复合涂层。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)分析了涂层的物相和显微组织。结果表明:激光熔覆的复合涂层与基体呈冶金结合,γ-NiCrAlTi/TiC+TiWC2/CrS+Ti2CS复合涂层主要由硬质TiC和TiWC2为耐磨增强相、γ-NiCrAlTi为增韧相、Ti2CS和CrS金属硫化物为自润滑相的自润滑耐磨复合涂层。随着固体润滑剂WS2添加含量的增加,γ-NiCrAlTi/TiC+TiWC2/Ti2CS+CrS涂层中的金属硫化物体积分数明显增加,复合涂层的磨损率逐渐降低,复合涂层自润滑耐磨性能明显增强。The NiCr/Cr3 C2-10%WS2 ,NiCr/Cr3 Cz-20%WS2 and NiCr/Cr3 C2-30 WSz are used as alloy powders preplaced onthe Ti6A14V, then the 7-NiCrA1Ti/TiC＋TiWCz/CrS＋TizCS self-lubrication wear resistant composite coatings were fabrica-ted by laser cladding technology. The constituents and microstructure of the fabricated coatings were examined by X-ray dif-fraction （XRD）, scanning electron microscope （SEM）, energy dispersive spectroscopy（ EDS） techniques. The results show thatthe bonding of the coatings to the substrates is completely metallurgical. The microstructure of the composite coating is consis-ted of TiC and TiWC2carbides, self-lubricating Ti2 CS and CrS sulfides. With the increase of the addition of solid lubricationWS2, the content of Ti2 CS and CrS is increased which lead to the decrease of wear rate of the composite coating. The self-lubri-cating wear resistant ability of the composite coating is improved.

关 键 词：激光熔覆 TI6AL4V 复合涂层 WS2 

分 类 号：TG125.9[金属学及工艺—金属学]