苏科强,李玉新,张鹏飞,吴利芸,张宏建,尉利强,李昕宸,郑博方.Ti6Al4V表面激光熔覆Ti/TiBCN复合涂层研究[J].表面技术,2018,47(12):142-148.
SU Ke-qiang,LI Yu-xin,ZHANG Peng-fei,WU Li-yun,ZHANG Hong-jian,YU Li-qiang,LI Xin-chen,ZHENG Bo-fang.TiBCN Coatings Prepared on Ti6Al4V Surface by Laser Cladding[J].Surface Technology,2018,47(12):142-148 |
| Ti6Al4V表面激光熔覆Ti/TiBCN复合涂层研究 |
| TiBCN Coatings Prepared on Ti6Al4V Surface by Laser Cladding |
| 投稿时间：2018-06-05 修订日期：2018-12-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.12.020 |
| 中文关键词: 激光熔覆 激光比能 Ti6Al4V Ti/TiBCN涂层 微观组织 显微硬度 耐腐蚀性 耐磨性 |
| 英文关键词:laser cladding laser specific energy Ti6Al4V Ti/TiBCN coating microstructure microhardness corrosion re-sistance wear resistanc |
| 基金项目:国家自然科学基金（51604246）；山西省科技攻关项目（2015031011-2，201603D121002-2）；山西省高等学校科技创新项目（2015104） |
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| Author | Institution |
| SU Ke-qiang | School of Material Science and Engineering, North University of China, Taiyuan 030051, China |
| LI Yu-xin | School of Material Science and Engineering, North University of China, Taiyuan 030051, China |
| ZHANG Peng-fei | School of Material Science and Engineering, North University of China, Taiyuan 030051, China |
| WU Li-yun | School of Material Science and Engineering, North University of China, Taiyuan 030051, China |
| ZHANG Hong-jian | School of Material Science and Engineering, North University of China, Taiyuan 030051, China |
| YU Li-qiang | School of Material Science and Engineering, North University of China, Taiyuan 030051, China |
| LI Xin-chen | School of Material Science and Engineering, North University of China, Taiyuan 030051, China |
| ZHENG Bo-fang | School of Material Science and Engineering, North University of China, Taiyuan 030051, China |
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| 中文摘要: |
| 目的 提高Ti6Al4V表面硬度、耐腐蚀性和耐磨性。方法 采用激光熔覆技术在Ti6Al4V表面制备Ti/TiBCN复合涂层，研究不同激光比能对涂层组织与性能的影响。利用X射线衍射仪（XRD）、扫描电子显微镜（SEM）、显微维氏硬度计、电化学工作站和往复摩擦磨损试验机研究了涂层的相组成、显微组织、显微硬度、耐腐蚀性和耐磨性。结果 当激光比能为13.3 kJ/cm2、TiBCN含量为70%时，Ti/TiBCN复合涂层质量最好。涂层上部由胞状晶、花瓣状结构、须状结构和等轴α相组成，涂层中部主要由粗大TiBCN枝晶组成，涂层下部由针状结构和类球形TiBCN颗粒组成。与Ti6Al4V基体相比，涂层硬度达1050HV0.2，约为基体显微硬度（340HV0.2）的3.0倍。基体自腐蚀电位为-1.388 V，自腐蚀电流密度为-6.33 A/cm2；涂层自腐蚀电位为-1.173 V，自腐蚀电流密度为-6.22 A/cm2。摩擦磨损实验中，涂层出现轻微的剥落、磨粒磨损式的浅短磨痕和颗粒碎屑，基体表面出现较多犁沟式磨损。涂层的平均摩擦因数为0.174，约是基体（0.323）的1/2；涂层的磨损量为1.152 mg，约是基体（6.723 mg）的1/6。结论 当激光比能为13.3 kJ/cm2时，涂层的组织均匀致密，硬度显著提高，耐腐蚀性和耐磨性优于基体。 |
| 英文摘要: |
| The work aims to improve Ti6Al4V surface hardness, corrosion resistance and wear resistance. Ti/TiBCN composite coatings were prepared on the surface of Ti6Al4V by laser cladding technique. The effect of different laser specific energy on the microstructure and properties of the coatings was investigated. The phase composition, microstructure, microhardness, corrosion resistance and wear resistance of the coatings were investigated by X-ray diffractometer, scanning electron microscope (SEM), micro Vickers hardness tester, electrochemical workstation and reciprocating friction and wear tester. When the laser specific energy was 13.3 kJ/cm2 and the content of TiBCN was 70%, the quality of Ti/TiBCN composite coating was the best. The upper part of the coating consisted of cellular crystal, petal structure, whisker structure and equiaxed α phase. The middle part of the coating was mainly composed of coarse TiBCN dendrite, while the lower part of the coating was comprised of needle-like structure and spherical TiBCN particles. Compared with Ti6Al4V substrate, the hardness of the coating was 1050HV0.2, which was about 3.0 times of that of the substrate (340HV0.2). The self-corrosion potential of the substrate was -1.388 V and the self-corrosion current density was -6.33 A/cm2, while the self-corrosion potential of the coating was -1.173 V and the self-corrosion current density was -6.22 A/cm2. In the friction and wear experiments, the coating appeared slight spalling, the abrasive wear type was shallow and short wear mark and particle debris and the substrate surface appeared more ploughing wear. The average friction coefficient of the coating was 0.174, which was about 1/2 of that of the substrate (0.323). The wear loss of the coating was 1.152 mg, which was about 1/6 of the substrate (6.723 mg). When the laser specific energy is 13.3 kJ/cm2, the microstructure of the coating is uniform and compact, the hardness is improved significantly and the corrosion resistance and wear resistance of the coating are better than that of the substrate. |
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