| Mg-Gd-Y-Zr镁合金高速激光熔覆Al-Si涂层的组织与性能 |
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| 引用本文： | 杨胶溪,黄凯,武飞宇,孙宏波,阳代军,李曙光,葛学元,王淼辉. Mg-Gd-Y-Zr镁合金高速激光熔覆Al-Si涂层的组织与性能[J]. 金属热处理, 2023, 48(1): 217-223. DOI: 10.13251/j.issn.0254-6051.2023.01.038 |
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| 作者姓名： | 杨胶溪 黄凯 武飞宇 孙宏波 阳代军 李曙光 葛学元 王淼辉 |
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| 作者单位： | 北京工业大学材料与制造学部激光工程研究院,北京 100124;首都航天机械有限公司,北京 100076;北京机科国创轻量化科学研究院有限公司,北京 100083;中国机械科学研究总院先进成形技术与装备国家重点实验室,北京 100083 |
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| 基金项目： | 国家自然科学基金(52075011);先进成形技术与装备国家重点实验室开放基金(SKL202003) |
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| 摘 要： | 采用高速激光熔覆技术在Mg-Gd-Y-Zr镁合金表面制备Al-Si涂层。通过光学显微镜(OM)、X射线衍射仪(XRD)、扫描电镜(SEM)以及电化学分析测试、摩擦磨损测试对熔覆层的微观组织及性能进行表征,研究了基体与Al-Si涂层的冶金机理以及耐磨耐蚀能力。结果表明,熔覆层组织包括树枝状α-Mg固溶体、不规则块状Mg2Si、α-Mg+Al12Mg17共晶以及花瓣状组织Al3Mg2。由于细晶强化和第二相强化等原因,Al-Si涂层的硬度达到160 HV0.1。此外,与镁合金基体相比,Al-Si涂层的耐腐蚀性能显著提高,自腐蚀电位相比基体提高约200 mV,自腐蚀电流密度降低2个数量级,抗磨损效果提高30.7%,因此Al-Si涂层有望成为稀土镁合金更有前景的耐磨耐蚀防护涂层。
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| 关 键 词： | 稀土镁合金 激光熔覆 Al-Si涂层 显微组织 耐腐蚀性 耐磨性能 |
| 收稿时间： | 2022-08-10 |
Microstructure and properties of high speed laser clad Al-Si coating on Mg-Gd-Y-Zr magnesium alloy |
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| Yang Jiaoxi,Huang Kai,Wu Feiyu,Sun Hongbo,Yang Daijun,Li Shuguang,Ge Xueyuan,Wang Miaohui. Microstructure and properties of high speed laser clad Al-Si coating on Mg-Gd-Y-Zr magnesium alloy[J]. Heat Treatment of Metals, 2023, 48(1): 217-223. DOI: 10.13251/j.issn.0254-6051.2023.01.038 |
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| Authors: | Yang Jiaoxi Huang Kai Wu Feiyu Sun Hongbo Yang Daijun Li Shuguang Ge Xueyuan Wang Miaohui |
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| Affiliation: | 1. Institute of Laser Engineering, Faculty of Material and Manufacturing, Beijing University of Technology, Beijing 100124, China; 2. Capital Aerospace Machinery Co., Ltd., Beijing 100076, China; 3. Beijing National Innovation Institute of Lightweight Ltd., Beijing 100083, China; 4. State Key Laboratory for Advanced Forming Technology and Equipment, China Academy of Machinery and Technology, Beijing 100083, China |
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| Abstract: | Microstructure and properties of Al-Si coating prepared on the surface of Mg-Gd-Y-Zr magnesium alloy by high-speed laser cladding process were characterized by means of optical microscope (OM), X-ray diffractometer (XRD), scanning electron microscope (SEM) and electrochemical test and wear test, and the metallurgical mechanism and wear and corrosion resistance of the substrate and Al-Si coating were analyzed. The results show than the microstructure of clad coating consists of dendritic α-Mg solid solution, irregular massive Mg2Si, α-Mg+Mg17Al12 eutectic and petal-like Mg2Al3. Due to grain refinement strengthening and secondary phase strengthening, the hardness of the Al-Si coating reaches 160 HV0.1. In addition, compared with the magnesium alloy substrate, the corrosion resistance of the Al-Si coating is significantly improved, the self-corrosion potential is increased by about 200 mV, the self-corrosion current density is reduced by 2 orders of magnitude, and the anti-wear effect is increased by 30.7%, which indicate that the Al-Si coating is expected to become a more promising wear and corrosion resistant protective coatings for rare earth magnesium alloys. |
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| Keywords: | rare earth magnesium alloy laser cladding Al-Si coating microstructure corrosion resistance wear resistance |
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