为了进一步提高钛合金激光熔覆层的质量,以NiCr/Cr3C2-WS2复合粉末为原料,采用激光熔覆技术在Ti6Al4V(TC4)钛合金表面制备了自润滑耐磨复合涂层,并将复合涂层在600℃下保温1h,采用扫描电镜、X射线衍射仪、摩擦磨损试验系统地分析了涂层热处理前后的组织、显微硬度和摩擦学性能的变化及其机理,研究了热处理对自润滑耐磨复合涂层性能的影响.结果表明:自润滑耐磨复合涂层的主要物相为韧性相NiTi2,增强相Cr3C2、Cr7C3 、TiC以及润滑相Ti2SC、CrS;热处理1h后涂层的显微硬度(928.8 HV5N)相对于未热处理涂层(1 076.1HV5N)略有下降;相对于未热处理涂层,热处理1h后的涂层表现出良好的耐磨减摩性能,其磨损机理为磨粒磨损.
参考文献
| [1] | Wang DS;Liang EJ;Chao MJ;Yuan B.Investigation on the microstructure and cracking susceptibility of laser-clad V2O5/NiCrBSiC alloy coatings[J].Surface & Coatings Technology,20088(8):1371-1378. |
| [2] | X.D. Lu;H.M. Wang.High-temperature phase stability and tribological properties of laser clad Mo_2Ni_3Si/NiSi metal silicide coatings[J].Acta materialia,200418(18):5419-5426. |
| [3] | Li, G. J.;Li, J.;Luo, X..Effects of post-heat treatment on microstructure and properties of laser cladded composite coatings on titanium alloy substrate[J].Optics & Laser Technology,2015:66-75. |
| [4] | Xiu-Bo Liu;Chen Zheng;Yuan-Fu Liu;Ji-Wei Fan;Mao-Sheng Yang;Xiang-Ming He;Ming-Di Wang;Hong-Bing Yang;Long-Hao Qi.A comparative study of laser cladding high temperature wear-resistant composite coating with the addition of self-lubricating WS_2 and WS_2/(Ni-P) encapsulation[J].Journal of Materials Processing Technology,20131(1):51-58. |
| [5] | P. Skarvelis;A. Rokanopoulou;G. D. Papadimitriou.Formation of TiS and Ti_4C_2S_2 in steel matrix composites prepared by the plasma transferred arc (PTA) technique using TiS_2 and TiC powders[J].Tribology International,2013:44-48. |
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