杜宝帅,胥国祥,张忠文,李新梅,邓化凌.钛合金表面等离子弧熔覆原位自生镍基耐磨涂层的制备及微观结构表征[J].表面技术,2019,48(10):214-219.
DU Bao-shuai,XU Guo-xiang,ZHANG Zhong-wen,LI Xin-mei,DENG Hua-ling.Preparation and Microstructure Characterization of In-situ Self-generated Nickel-based Wear Resistant Coating on Titanium-based Alloy Surface by Plasma Arc Cladding[J].Surface Technology,2019,48(10):214-219 |
| 钛合金表面等离子弧熔覆原位自生镍基耐磨涂层的制备及微观结构表征 |
| Preparation and Microstructure Characterization of In-situ Self-generated Nickel-based Wear Resistant Coating on Titanium-based Alloy Surface by Plasma Arc Cladding |
| 投稿时间：2019-01-24 修订日期：2019-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.10.026 |
| 中文关键词: 等离子弧熔覆 钛合金 耐磨涂层 TiB2 TiC CrB |
| 英文关键词:plasma arc cladding titanium alloy wear-resistant coating TiB2 TiC CrB |
| 基金项目: |
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| Author | Institution |
| DU Bao-shuai | 1.State Grid Shandong Electric Power Research Institute, Jinan 250002, China; 2.Shandong Electric Power Industry Boiler & Pressure Vessel Inspection Center Co., Ltd, Jinan 250002, China |
| XU Guo-xiang | 3.School of Materials Science and Engineering, Jiangsu University of Science and Technology, Jiangsu 212003, China |
| ZHANG Zhong-wen | 1.State Grid Shandong Electric Power Research Institute, Jinan 250002, China; 2.Shandong Electric Power Industry Boiler & Pressure Vessel Inspection Center Co., Ltd, Jinan 250002, China |
| LI Xin-mei | 1.State Grid Shandong Electric Power Research Institute, Jinan 250002, China |
| DENG Hua-ling | 1.State Grid Shandong Electric Power Research Institute, Jinan 250002, China; 2.Shandong Electric Power Industry Boiler & Pressure Vessel Inspection Center Co., Ltd, Jinan 250002, China |
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| 中文摘要: |
| 目的 在钛合金表面制备陶瓷相增强复合耐磨涂层。方法 采用等离子弧熔覆技术，在Ti6Al4V钛合金表面制备了原位自生TiB2、TiC、CrB陶瓷相增强镍基耐磨涂层。采用X射线衍射仪、扫描电镜、能谱仪检测了涂层的物相组成、组织组织以及微区化学成分，采用显微硬度计测试了涂层的硬度。结果 涂层靠近熔合线区域由Ni-Ti树枝晶及枝晶间的共晶组成，在涂层的中上部，大量原位增强相分布于镍基固溶体基体之中。在熔覆过程中，钛合金基材中的Ti元素同熔覆粉末中的B、C元素发生原位冶金反应形成TiB2、TiC增强相，CrB增强相为Ni基熔覆粉末中Cr、B元素反应形成，增强相的形态由各自的晶体结构及熔池凝固热力学与动力学条件决定。涂层的显微硬度得到显著提高，最高达1037HV0.2。结论 采用等离子弧熔覆技术，利用熔池内Ni-Cr-Ti-B-C合金体系的原位冶金反应，可以在钛合金表面制备原位自生TiB2、TiC、CrB增强镍基复合耐磨涂层。同Ti6Al4V基材相比，由于涂层具有大量增强相分布于镍基固溶体的组织特征，其显微硬度得到了显著提高。 |
| 英文摘要: |
| The work aims to prepare ceramic reinforced composite wear-resistant coating on titanium alloy. In-situ self-generated TiB2, TiC and CrB ceramic reinforced Ni-based wear-resistant coatings were fabricated on Ti6Al4V by plasma arc cladding. X-ray diffractometer, scanning electron microscopy, energy dispersive spectroscopy and microhardness tester were used to characterize and test the phase composition, microstructure, chemical components in micro zone and mircohardness of the coating. Microstructure of the area nearby the fusion line consisted of Ni-Ti dendrites and eutectic phase dispersed between dendrites. A large amount of in situ reinforcing phase in the middle and upper part of the coating distributed in the Ni-based solid solution matrix. TiB2 and TiC reinforcing phases were formed by the in situ reaction between B and C elements from the melted titanium base metal and the cladding powder; while CrB reinforcing phase was formed by the reaction of Cr and B elements from the Ni-based cladding powder. Morphology of the reinforcing phase was determined by the combination of crystal structure and thermodynamic and kinetic condition of the cladding pool. Therefore, the microhardness of the coating increased apparently with the highest value of 1037HV0.2. By the plasma cladding technology, in-situ self-generated TiB2, TiC and CrB ceramic reinforced Ni-based wear-resistant coatings can be prepared on titanium alloy with in situ metallurgical reaction of Ni-Cr-Ti-B-C system in bath. Compared with Ti6Al4V, the microhardness of the coating increases significantly due to the presence of massive reinforcing phase dispersed in the Ni-based solid solution matrix. |
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