余娟娟,张晓玉,马玲玲,李涵,邹龙江,张维平.钛合金表面激光熔覆 Ti / Ni+Si3 N4 / ZrO2 复合涂层组织与性能研究[J].表面技术,2016,45(4):105-109,174.
YU Juan-juan,ZHANG Xiao-yu,MA Ling-ling,LI Han,ZOU Long-jiang,ZHANG Wei-ping.Microstructures and Properties of Laser Cladding Ti / Ni+Si3N4 / ZrO2 Composite Coatings on TA15 Titanium Alloys[J].Surface Technology,2016,45(4):105-109,174 |
| 钛合金表面激光熔覆 Ti / Ni+Si3 N4 / ZrO2 复合涂层组织与性能研究 |
| Microstructures and Properties of Laser Cladding Ti / Ni+Si3N4 / ZrO2 Composite Coatings on TA15 Titanium Alloys |
| 投稿时间：2015-11-09 修订日期：2016-04-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.04.018 |
| 中文关键词: 激光熔覆 钛合金 熔覆层 韧性 硬度 耐磨性 |
| 英文关键词:laser cladding titanium alloys cladding layer toughness hardness wear resistance |
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| Author | Institution |
| YU Juan-juan | School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China |
| ZHANG Xiao-yu | School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China |
| MA Ling-ling | School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China |
| LI Han | School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China |
| ZOU Long-jiang | School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China |
| ZHANG Wei-ping | School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China |
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| 中文摘要: |
| 目的 提高 TA15 合金的表面硬度,改善其耐磨性能。 方法 以 Ti/ Ni+Si3N4 / ZrO2 混合粉末为原料,利用激光熔覆技术,在 TA15 钛合金表面制备出以 ZrO2 颗粒和原位生成 Ti5Si3、TiN 为增强相,以金属化合物 TiNi、Ti2Ni 为基体的复合涂层。 采用 X 射线衍射仪、扫描电镜及能谱仪等手段分析激光熔覆涂层的显微组织及磨损表面,通过硬度测试、摩擦磨损实验,对熔覆层的显微硬度和耐磨性进行评估。 结果熔覆层与基体形成了良好的冶金结合,熔覆层组织中 TiNi 和 Ti2Ni 金属化合物基体上弥散分布着 Ti5Si3、TiN 树枝晶和 ZrO2 颗粒;与不含 ZrO2 熔覆层相比,含有 ZrO2 熔覆层组织的晶粒得到细化;熔覆层中原位生成的 TiN 桥接在裂纹上,具有增韧的作用;熔覆层的显微硬度分布在 835 ~ 1050HV 区间内,约为基体硬度的 3 倍左右;在干滑动摩擦磨损下,熔覆层的磨损量约为钛合金基体磨损量的 1 /6,其主要磨损机制为磨粒磨损和黏着磨损。 结论 熔覆层中高硬度、耐磨陶瓷相和高韧性相的共同配合,显著提高了钛合金表面的硬度和耐磨性。 |
| 英文摘要: |
| Objective To improve the hardness and wear resistance of the surface of titanium alloys. Methods Wear-resistant Ti5Si3-TiN reinforced TiNi-Ti2Ni intermetallic matrix composite coatings were prepared on TA15 titanium alloys by the laser cladding process using Ti/ Ni+Si3N4 / ZrO2 powder blends as the precursor materials. Microstructure and worn surface morphologies of the coating were analyzed by X-ray diffraction, scanning electron microscopy and energy dispersive spectrometer. The micro-hardness and wear resistance of the coating were evaluated by the hardness test and friction and wear test. Results The results indicated that the coating and the base had a good metallurgical bond. Ti5 Si3 , TiN dendrites and ZrO2 particles were evenly distributed in the coatings consisting of TiNi and Ti2 Ni dendrites. Besides, the ZrO2 could refine the microstructure of the coating and the TiN which was generated in situ bridging the cracks in the cladding layer had toughening effect to some extent. The microhardness of the substrate was distributed in the range of 835 ~ 1050 HV, which was 3 times as high as that of the cladding layer. The wear loss of the substrate was about 1 / 6 that of the cladding layer, and the main wear mechanisms were abrasive wear and adhesive wear . Conclusion The high hardness, wear-resistant ceramic phase and high toughness phase of the coating significantly improved the hardness and wear resistance of the surface of titanium alloy. |
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