谭金花,孙荣禄,牛伟,刘亚楠,郝文俊.Ni60/h-BN含量对激光熔覆钛基复合涂层组织及性能的影响[J].表面技术,2019,48(10):107-115.
TAN Jin-hua,SUN Rong-lu,NIU Wei,LIU Ya-nan,HAO Wen-jun.Effect of Ni60/h-BN Content on Microstructures and Properties of Laser Cladding Titanium-based Composite Coatings[J].Surface Technology,2019,48(10):107-115 |
| Ni60/h-BN含量对激光熔覆钛基复合涂层组织及性能的影响 |
| Effect of Ni60/h-BN Content on Microstructures and Properties of Laser Cladding Titanium-based Composite Coatings |
| 投稿时间：2018-12-28 修订日期：2019-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.10.013 |
| 中文关键词: 钛合金 激光熔覆 Ni60/h-BN 陶瓷 微观组织 耐磨性 |
| 英文关键词:titanium alloy laser cladding Ni60/h-BN ceramic microstructure wear resistance |
| 基金项目:国家自然科学基金项目（51371125） |
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| Author | Institution |
| TAN Jin-hua | 1.School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China |
| SUN Rong-lu | 1.School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China; 2.Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin 300387, China |
| NIU Wei | 1.School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China; 2.Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin 300387, China |
| LIU Ya-nan | 1.School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China |
| HAO Wen-jun | 1.School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China |
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| 中文摘要: |
| 目的 提高TC4合金的硬度与耐磨性。方法 利用RFL-C1000锐科光纤激光器在TC4合金表面制备钛基复合涂层，通过SEM、XRD、EDS、显微硬度计、摩擦磨损试验机对熔覆层的宏观形貌、微观组织、显微硬度以及摩擦磨损性能进行观察及测试。结果 当Ni60/h-BN的添加量为25%时，熔覆层表面平整度最好，且与基体呈现出良好的冶金结合；当Ni60/h-BN的添加量为5%时，熔覆层物相主要由Ti2N0.3、TiC和基底α-Ti组成；当Ni60/h-BN的添加量为15%时，Ti2N0.3、α-Ti和TiC的含量减少，Ti2Ni的含量增加；当Ni60/h-BN的添加量为25%时，Ti2Ni、TiNi、TiN、Ti2N0.3、TiB、TiC和α-Ti均匀分布在熔覆层中，此时熔覆层的硬度为997HV0.5，约为TC4基体硬度（332HV0.5）的3倍。TC4基体主要发生了磨粒磨损，熔覆层主要发生了粘着磨损。当Ni60/h-BN添加量为25%时，磨损形貌最好，磨损量为0.6 mg，摩擦系数稳定在0.51~0.52之间。结论 当Ni60/h-BN的添加量为25%时，熔覆层组织均匀致密，硬度与耐磨性能较基体有了显著提高。 |
| 英文摘要: |
| The work aims to improve the hardness and wear resistance of TC4 alloy. The Ti-based composite coating was prepared on the surface of TC4 alloy by RFL-C1000 Raycus fiber laser. The macroscopic morphology, microstructure, microhardness and wear properties of the cladding layer were observed and tested by SEM, XRD, EDS, microhardness tester and friction wear tester. When Ni60/h-BN content was 25%, the surface flatness ratio of the cladding layer was the best and good metallurgical bonding could be obtained between cladding layer and substrate. When Ni60/h-BN content was 5%, phase of cladding layer was mainly composed of Ti2N0.3, TiC and α-Ti. When Ni60/h-BN content was 15%, the content of Ti2N0.3, α-Ti and TiC decreased, while that of Ti2Ni increased. When Ni60/h-BN content was 25%, Ti2Ni, TiNi, TiN, Ti2N0.3, TiB, TiC and α-Ti were evenly distributed in the cladding layer. At this time, the hardness of the cladding layer was 997HV0.5, which was about 3 times of that of the TC4 substrate (332HV0.5). The wear mechanism of the TC4 substrate and the cladding layer were abrasive wear and adhesive wear, respectively. When Ni60/h-BN content was 25%, wear appearance was the best, the wear mass loss was 0.6 mg, and the friction coefficient of the cladding layer kept stable between 0.51 and 0.52. When Ni60/h-BN content is 25%, the microstructure of the cladding layer is uniform and compact and the hardness and wear resistance are significantly improved than that of the TC4 substrate. |
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