精品文档---下载后可任意编辑AZ31B 镁合金搅拌摩擦焊焊缝微弧氧化处理的讨论的开题报告摘要镁合金具有重量轻、强度高、耐腐蚀等优点，在航空、汽车、电子等领域有广泛应用。但是，镁合金的加工性能不佳，焊接过程容易出现裂纹、变形等缺陷，影响其工业应用。因此，对于镁合金的焊接和表面处理技术的讨论具有重要意义。本文针对 AZ31B 镁合金搅拌摩擦焊焊缝表面微弧氧化处理的问题展开讨论。首先，对于 AZ31B 镁合金进行搅拌摩擦焊，通过金相组织观察和力学性能测试，确定焊接参数，制备出合适的焊接样件。然后，利用微弧氧化技术对焊缝表面进行处理，探究微弧氧化处理对焊接性能和表面性质的影响。讨论表明，通过搅拌摩擦焊，可以得到具有良好力学性能的焊件，焊缝区域呈现出细小的晶粒结构和均匀的组织。然后，对焊接表面进行微弧氧化处理，可以在焊接区域形成均匀致密的氧化膜，提高了焊件的耐腐蚀性和表面硬度。本讨论的结果为 AZ31B 镁合金搅拌摩擦焊焊缝表面微弧氧化处理提供了一定的理论基础和实验依据，对于提升镁合金焊接和表面处理技术具有一定的参考和借鉴意义。关键词：镁合金；搅拌摩擦焊；微弧氧化处理；焊接性能；表面性质。AbstractMagnesium alloys have the advantages of light weight, high strength, and corrosion resistance, and are widely used in aviation, automotive, electronics and other fields. However, the processing performance of magnesium alloys is poor, and the welding process is prone to defects such as cracks and deformation, which affect its industrial application. Therefore, research on welding and surface treatment technology of magnesium alloys is of great significance.In this paper, we conducted a study on micro-arc oxidation treatment on the surface of the AZ31B magnesium alloy friction stir welding seam. Firstly, the welding parameters of AZ31B magnesium alloy were determined through 精品文档---下载后可任意编辑metallographic observation and mechanical performance test by friction stir welding, and suitable welding specimens were prepared. Then, the micro-arc oxidation technology was used to...
