为拓宽钛合金表面耐磨自润滑复合涂层的研究领域,采用10 kW CO2激光器,在Ti-6Al-4V钛合金表面熔覆制备了4种不同WS2含量(0,10％,20％,30％)的NiCr/Cr3C2-WS2层.利用扫描电镜(SEM)、能谱分析仪(EDS)和X射线衍射仪(XRD)等分析了涂层组织、相组成以及磨损形貌,利用MH-5半自动显微硬度计和HT-1000型球-盘式高温摩擦磨损试验机测试了涂层的硬度和摩擦磨损性能,对比研究了4种NiCr/Cr3C2-WS2熔覆层的微观组织和在室温、载荷为6N条件下的摩擦学性能.结果表明:未添加WS2熔覆层的组织主要是由γ-NiCrAlTi,TiC和α-Ti相组成,添加WS2熔覆层的组织主要是由γ-NiCrAlTi,TiC,TiWC2,α-Ti,Ti2CS和CrS相组成;未添加WS2的熔覆层的平均显微硬度最高,达到1 149 HV2N,是钛合金基体显微硬度的3.2倍.添加WS2固体自润滑剂改善了熔覆层摩擦学性能,其中添加30％ WS2的熔覆层摩擦学性能最佳.
参考文献
| [1] | 章小峰,王爱华,张祥林,黄早文.激光熔覆Ni基纳米Ni包h-BN/CaF2涂层组织性能[J].华中科技大学学报（自然科学版）,2009(01):9-13. |
| [2] | 章小峰,王爱华,张祥林,乔晓勇,黄早文.激光熔覆Ni45-CaF2-WS2自润滑涂层组织与性能[J].中国有色金属学报,2008(02):215-220. |
| [3] | 郑晨,刘秀波,杨茂盛,王明娣,石世宏,傅戈雁,齐龙浩.添加WS2/（Ni-P）包覆的激光制备高温自润滑耐磨复合涂层[J].材料热处理学报,2013(06):136-141. |
| [4] | Sun, RL;Lei, YW;Niu, W .Laser clad TiC reinforced NiCrBSi composite coatings on Ti-6Al-4V alloy using a CW CO2 laser[J].Surface & Coatings Technology,2009(10/11):1395-1399. |
| [5] | Yang Y L;Zhang D;Yan W et al.Microstructure and wear properties of TiCN/Ti coating on titanium alloy by laser cladding[J].Optics and Laser in Engineering,2010,48(1):119 ～124. |
| [6] | Liu X B;Yu R L .Microstructure and high-temperature wear and oxidation resistance of laser clad γ/W2 C/TiC composite coatings on γ-TiAl intermetallic alloy[J].Journal of Alloys and Compounds,2007,439(1/2):279 ～ 286. |
| [7] | 孟祥军,刘秀波,刘海青,郑晨,孙承峰,王明娣,齐龙浩.热处理对NiCr/Cr3C2-WS2复合涂层组织与性能的影响[J].材料热处理学报,2013(z2):188-193. |
| [8] | Li Jianing;Chen Chuanzhong;Zong Lei .Microstructure characteristics of Ti_3Al/TiC ceramic layer deposited by laser cladding[J].International Journal of Refractory Metals & Hard Materials,2011(1):49-53. |
| [9] | Guo BG;Zhou JS;Zhang ST;Zhou HH;Pu YP;Chen JM .Microstructure and tribological properties of in situ synthesized TiN/Ti3Al intermetallic matrix composite coatings on titanium by laser cladding and laser nitriding[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):404-410. |
| [10] | Wang C B;Du L Z;Zhang W G .Effect of solid lubricant content on the microstructure and properties of NiCr/Cr3C2-BaF2 composite coatings[J].Journal of Alloys and Compounds,2009,479(1/2):777 ～ 784. |
| [11] | Xiong DS. .Lubrication behavior of Ni-Cr-based alloys containing MoS2 at high temperature[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2001(2):1094-1099. |
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