| 摘要: |
| 采用手工钨极氩弧焊(TIG焊)在ZM5合金上制备镁合金单道、多道熔敷层，研究熔敷层的组织和力学性能。微观组织和物相分析表明，熔敷层由αMg相和βMg17Al12相组成，其晶粒较母材明显细化，热影响区晶粒较粗大；硬度分析表明单道熔敷层硬度达到80 HV0.05以上，而多道熔敷层的硬度约为77 HV0.05，均优于母材，热影响区的硬度与母材相当；摩擦磨损性能分析表明，熔敷层以磨粒磨损为主，平均摩擦因数为0.48，母材以粘着磨损为主，平均摩擦因数为0.42。试验验证了镁合金熔敷成形再制造的可行性，为ZM5镁合金多样性损伤的修复提供数据支撑。 |
| 关键词: TIG焊 ZM5镁合金 熔敷层 成形再制造 力学性能 |
| DOI：10.11933/j.issn.1007-9289.2015.04.015 |
| 分类号: |
| 基金项目: |
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| Microstructure and Mechanical Properties of Remanufacturing Depositing Layers of TIG Welding on ZM5 Magnesium Alloy |
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YAO Jukun, WANG Zhiqian, WANG Xiaoming, YIN Fengliang, HAN Bingyuan1,2
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1. Science and Technology on Remanufacturing Laboratory, Academy of Armored Forces Engineering;2. School of Automotive and Traffic Engineering, Jiangsu University of Technology
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| Abstract: |
| Single and multipass depositing layers on ZM5 magnesium alloy were welded by manual tungsten arc inertgas (TIG) welding, and the microstructure and mechanical properties of the depositing layers were analyzed. The microstructure and element analysis shows that the depositing layer consisting of αMg phases and βMg17Al12 phases is finer than the base metal; however the grains of heat affected zone are coarse. The hardness analysis shows that the hardness of single depositing layer is beyond 80 HV0.05, and the hardness of multipass depositing layer is about 77 HV0.05, both of them are superior to the substrate. However, the hardness of heat affected zone matches the substrate. Then wear friction analysis shows that depositing layer is mainly abrasive wear, and its average friction coefficient is 0.48, however the substrate wear is mainly adhered wear, therefore, its average friction coefficient is 0.42. These data can provide a support for surface and volume damage on ZM5 repairing, and also gives the feasibility of the depositing formation of magnesium alloy remanufacturing. |
| Key words: TIG welding ZM5 magnesium alloy depositing layer formable remanufacturing mechanical property |
