乔世杰,刘秀波,翟永杰,徐江宁,高伟强,姚志远.TA2合金激光熔α-Ti/TiC+(Ti,W)C1-x/Ti2SC+TiS自润滑耐磨复合涂层[J].表面技术,2017,46(5):52-57.
QIAO Shi-jie,LIU Xiu-bo,ZHAI Yong-jie,XU Jiang-ning,GAO Wei-qiang,YAO Zhi-yuan.Laser Cladding α-Ti/TiC+(Ti,W)C1—x/Ti2SC+TiS Self-lubricating Wear-resistant Composite Coating on TA2 Alloy[J].Surface Technology,2017,46(5):52-57 |
| TA2合金激光熔α-Ti/TiC+(Ti,W)C1-x/Ti2SC+TiS自润滑耐磨复合涂层 |
| Laser Cladding α-Ti/TiC+(Ti,W)C1—x/Ti2SC+TiS Self-lubricating Wear-resistant Composite Coating on TA2 Alloy |
| 投稿时间：2016-11-21 修订日期：2017-05-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.05.010 |
| 中文关键词: TA2合金 激光熔覆 显微硬度 耐磨减摩 复合涂层 WS2 |
| 英文关键词:TA2 alloy laser cladding microhardness wear resistance and antifriction composite coating WS2 |
| 基金项目:国家自然科学基金委员会-中国民航局民航联合研究基金（U1533101）；清华大学摩擦学国家重点实验室开放基金（SKLTKF15B01）；苏州市科技计划项目（SYG201635） |
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| Author | Institution |
| QIAO Shi-jie | School of Mechanical and Electric Engineering, Soochow University, Suzhou 215006, China |
| LIU Xiu-bo | 1.School of Mechanical and Electric Engineering, Soochow University, Suzhou 215006, China; 2. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China |
| ZHAI Yong-jie | School of Mechanical and Electric Engineering, Soochow University, Suzhou 215006, China |
| XU Jiang-ning | School of Mechanical and Electric Engineering, Soochow University, Suzhou 215006, China |
| GAO Wei-qiang | School of Mechanical and Electric Engineering, Soochow University, Suzhou 215006, China |
| YAO Zhi-yuan | School of Mechanical and Electric Engineering, Soochow University, Suzhou 215006, China |
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| 中文摘要: |
| 目的 提高TA2钛合金的耐磨减摩性能，并研究添加WS2对激光熔覆Ti/TiC耐磨复合涂层的影响。方法 以Ti+TiC和Ti+TiC+WS2两种复合粉末为预置原料，采用激光熔覆技术在TA2合金表面制备出两类复合涂层，并采用X射线衍射仪（XRD）、扫描电镜（SEM）、能谱仪（EDS）、硬度计和摩擦磨损试验机，系统地分析了添加WS2前后涂层的物相、组织、显微硬度及摩擦学性能。结果 Ti+TiC复合粉末的激光熔覆涂层的主要物相包含α-Ti和TiC，涂层的显微硬度为1162HV0.5。WS2添加后，涂层中生成了新增强相(Ti,W)C1x及自润滑相Ti2SC和少量的TiS，涂层的显微硬度为1052.3HV0.5，约为TA2基体（180HV0.5）的5倍；此外，涂层的磨损率由未添加WS2时的5.38×105 mm3/(N•m)上升到15.98×105 mm3/(N•m)，耐磨性能有所下降但仍远低于基体（磨损率为66.63×105 mm3/(N•m)），同时摩擦系数显著下降，由之前的0.49下降到0.34；同时，Si3N4对磨球磨损表面光滑，没有明显塑性变形，其磨损机理为轻微的塑性变形和粘着磨损。结论 添加WS2的复合涂层相对于基体依然具有良好的耐磨性能，同时由于新生的自润滑相Ti2SC、TiS的润滑效果，涂层表现出良好的自润滑耐磨性能。 |
| 英文摘要: |
| The work aims to improve wear resistance and friction-reducing property of TA2 alloy and study the effects of adding WS2 on laser clad Ti/TiC composite coating. With Ti+TiC and Ti+TiC+WS2 composite powders as preset materials, two different composite coatings were fabricated on TA2 titanium alloy by laser cladding. Phase composition, microstructure, microhardness and tribological property of the coatings containing WS2 or not were investigated with X-ray diffractometer (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), hardness tester and friction-abrasion testing machine systematically. A composite coating consisting of α-Ti and TiC can be made from the Ti+TiC composite powder, microhardness of the laser clad Ti+TiC composite coating was 1162HV0.5. With the addition of WS2, new reinforced (Ti,W)C1x , self-lubricating Ti2SC and few CrS were produced in the coating. Microhardness of the laser clad Ti+TiC+WS2 composite coating was 1052.3HV0.5 and was about 5 times that of TA2 substrate (180HV0.5). Wear rate of the laser clad composite coating increased from 5.38×105 mm3/(N•m) to 15.98×105 mm3/(N•m) with the addition of WS2, wear resistance of the coating decreased and was still far below that of the substrate (66.63×105 mm3/(N•m)), and friction coefficient of the laser clad composite coating decreased form 0.49 to 0.34. Wear surface of Si3N4 counter-ball was smooth and free from obvious plastic deformation. Its wear mechanism was plastic deformation and adhesive wear. With the addition of WS2, composite coating still exhibits excellent wear resistance compared with the substrate. Meanwhile, due to lubrication effects of the self-lubricating Ti2SC and TiS, the laser clad Ti+TiC+WS2 composite coating presents excellent wear resistance and friction-reducing property. |
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