王晓波,俞臻,胡永辉,吴鹏,梅锦辉,蔡智会,许建平,马英鹤,郑文健,杨建国.微弧氧化改性对Ti6Al4V合金电子束接头耐蚀性能的影响[J].表面技术,2025,54(2):106-118.
WANG Xiaobo,YU Zhen,HU Yonghui,WU Peng,MEI Jinhui,CAI Zhihui,XU Jianping,MA Yinghe,ZHENG Wenjian,YANG Jianguo.Effect of Micro-arc Oxidation on Corrosion Resistance of Ti6Al4V Electron Beam Welded Joint[J].Surface Technology,2025,54(2):106-118 |
| 微弧氧化改性对Ti6Al4V合金电子束接头耐蚀性能的影响 |
| Effect of Micro-arc Oxidation on Corrosion Resistance of Ti6Al4V Electron Beam Welded Joint |
| 投稿时间：2024-01-29 修订日期：2024-11-14 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.02.008 |
| 中文关键词: 钛合金 电子束焊接 微弧氧化 耐蚀性 微观结构 腐蚀机制 |
| 英文关键词:titanium alloy electron beam welding micro-arc oxidation corrosion resistance microstructure corrosion mechanism |
| 基金项目:国家自然科学基金(52375391);浙江省科技计划项目-重点研发-尖兵领雁(2023C01244);黑龙江省自然科学基金(LH2022E102) |
| 作者 | 单位 |
| 王晓波 | 中国工程物理研究院 材料研究所，四川 绵阳 621700 |
| 俞臻 | 浙江工业大学 机械工程学院 过程装备及其再制造教育部工程研究中心，杭州 310023 |
| 胡永辉 | 浙江工业大学 机械工程学院 过程装备及其再制造教育部工程研究中心，杭州 310023 |
| 吴鹏 | 浙江工业大学 机械工程学院 过程装备及其再制造教育部工程研究中心，杭州 310023 |
| 梅锦辉 | 浙江工业大学 机械工程学院 过程装备及其再制造教育部工程研究中心，杭州 310023 |
| 蔡智会 | 温州市特种设备检测科学研究院，浙江 温州 325038 |
| 许建平 | 黑龙江工程大学 材料与化学工程学院，哈尔滨 150050 |
| 马英鹤 | 浙江工业大学 机械工程学院 过程装备及其再制造教育部工程研究中心，杭州 310023 |
| 郑文健 | 浙江工业大学 机械工程学院 过程装备及其再制造教育部工程研究中心，杭州 310023 |
| 杨建国 | 浙江工业大学 机械工程学院 过程装备及其再制造教育部工程研究中心，杭州 310023 |
|
| Author | Institution |
| WANG Xiaobo | Institute of Materials, China Academy of Engineering Physics, Sichuan Mianyang 621700, China |
| YU Zhen | College of Mechanical Engineering,Process Equipment and Remanufacturing Engineering Research Center of the Ministry of Education, Zhejiang University of Technology, Hangzhou 310023, China |
| HU Yonghui | College of Mechanical Engineering,Process Equipment and Remanufacturing Engineering Research Center of the Ministry of Education, Zhejiang University of Technology, Hangzhou 310023, China |
| WU Peng | College of Mechanical Engineering,Process Equipment and Remanufacturing Engineering Research Center of the Ministry of Education, Zhejiang University of Technology, Hangzhou 310023, China |
| MEI Jinhui | College of Mechanical Engineering,Process Equipment and Remanufacturing Engineering Research Center of the Ministry of Education, Zhejiang University of Technology, Hangzhou 310023, China |
| CAI Zhihui | Wenzhou Special Equipment Testing Science Research Institute, Zhejiang Wenzhou 325038, China |
| XU Jianping | Department of Materials and Chemical Engineering, Heilongjiang Institute of Technology, Harbin 150050, China |
| MA Yinghe | College of Mechanical Engineering,Process Equipment and Remanufacturing Engineering Research Center of the Ministry of Education, Zhejiang University of Technology, Hangzhou 310023, China |
| ZHENG Wenjian | College of Mechanical Engineering,Process Equipment and Remanufacturing Engineering Research Center of the Ministry of Education, Zhejiang University of Technology, Hangzhou 310023, China |
| YANG Jianguo | College of Mechanical Engineering,Process Equipment and Remanufacturing Engineering Research Center of the Ministry of Education, Zhejiang University of Technology, Hangzhou 310023, China |
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| 中文摘要: |
| 目的 提高Ti6Al4V合金电子束焊接接头耐蚀性能。方法 采用电子束焊接方法水平对接获得接头。利用微弧氧化技术对接头进行陶瓷化处理。通过光学显微镜、场发射扫描电子显微镜、X射线衍射仪、电化学腐蚀测试和浸泡腐蚀测试，分别评价未覆膜接头及覆膜接头涂层的组织、结构和耐蚀性能。结果 与母材相比，焊接接头微观组织发生较大变化，由初生α相与晶间β相混合相转变为针状α'马氏体集束，在晶界周围呈羽毛状分布。对接头与母材进行微弧氧化处理后，接头与母材区域表面特征相似，熔融状凸起较多且分布大小不均匀的微孔。然而，接头涂层孔径与孔隙率较小。与母材涂层相比，接头涂层厚度、完整性和连续性较低。接头涂层与母材涂层的主要组成均为金红石(Rutile)TiO2相和锐钛矿(Anatase)TiO2相。虽然与含涂层母材相比，含涂层接头耐蚀性较低，但其与不含涂层接头相比，自腐蚀电位(Ecorr)提升290 mV，自腐蚀电流密度(Jcorr)降低1个数量级，且在2 mol/L HCl溶液中浸泡腐蚀速率大幅降低。结论 微弧氧化处理可以有效提升接头在中性和酸性溶液中的耐腐蚀性能。 |
| 英文摘要: |
| Micro arc oxidation (MAO) technology is currently one of the widely used methods to improve the surface properties of titanium alloys. To improve the corrosion resistance of Ti6Al4V electron beam welded joints, MAO technology was applied in this paper. The article studied the influence of MAO treatment on the micro-structure and corrosion resistance of welded joints. The reasons for the improvement of joint corrosion resistance were analyzed. After grinding and polishing, the Ti6Al4V titanium alloy samples were sequentially cleaned by ultrasonic cleaning in acetone and alcohol, and dried for later use. An optimized welding process was adopted for titanium alloy flat plate butt welding. The welding parameters were high voltage of 65 kV, welding beam current of 10 mA, and electron beam linear velocity of 300 mm/min. After welding, the acetone and alcohol solution were used to perform ultrasonic cleaning on the welded samples. Then the base materials and the joints were treated by micro-arc oxidation simultaneously. The electrolyte was a mixed solution of 15 g/L Na2SiO3, 10 g/L Na3PO4, and 1 g/L NaOH. The power parameters included a current density of 14 A/dm2, a duty cycle of 20%, a pulse frequency of 500 Hz, and an oxidation time of 20 minutes. Optical microscope (OM), field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), electrochemical corrosion test and immersion corrosion test were taken to value the morphologies, phase structure, electrochemical corrosion performance and immersion corrosion performance of the base materials, joints and their coatings, respectively. Compared with the base material, the micro-structure of the welded joint underwent significant changes due to the high temperature and low cooling rate. The primary α phase and intergranular β phase were transformed to the acicular α' martensite, distributed in a feather-like pattern on both sides of the grain boundary. After micro-arc oxidation treatment of the base materials and the joint, the morphology of them were similar, showing unevenly distributed micro-pores of different sizes and molten protrusions resembling volcanoes. However, compared with the coatings on the base materials, the aperture and porosity of the joint coatings were relatively smaller. Compared with the base material coating, the thickness, integrity, and continuity of the joint coating were lower. The phases of the MAO coatings in the BM and WZ regions were similar, mainly showing the rutile phase TiO2 and anatase phase TiO2. And the α phase and α′ phase were also appeared in the XRD spectrum due to the small coating thickness and surface micropores, thus allowing the X-ray to penetrate the coatings. Additionally, due to the formation of an oxide film, the β phase disappeared. Compared with the base materials, the self-corrosion potential of the joint decreased by approximately 0.3 V, and the self-corrosion current increased by one order of magnitude. After the MAO treatment, polarization curves of the base materials and the joint appeared obvious passivation, and joint coating group were obviously wider. Although the corrosion resistance of coated joints was lower compared with coated base materials, their self-corrosion potential (Ecorr) was increased by 290 mV, the self-corrosion current densities (Jcorr) was reduced by an order of magnitude, and the corrosion rate was significantly reduced when immersed in 2 mol/L HCl solution compared with uncoated joints. The MAO treatment can improve the corrosion resistance of the joint in neutral and acidic corrosive medias. |
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