袁寅啸,李凯,刘明远,王楠,雷晓维

• 1:西北工业大学物理科学与技术学院

摘要(Abstract)：

针对2A97铝锂合金激光焊缝强度低和易腐蚀的问题，采用固溶处理来改善其焊缝组织和化学成分的均匀性，详细研究了固溶温度对焊缝组织和性能的影响规律与作用机理。结果表明：固溶处理可使激光焊缝边缘的细小等轴晶区消失，晶界Cu、Zn的偏析程度显著降低，焊缝的组织以及成分均匀化，使焊缝软化问题得到解决。熔凝态焊缝等轴晶区腐蚀最为严重，固溶处理诱使晶界偏析带发生溶解并产生析出相，使得焊缝由晶间腐蚀转变为点蚀，腐蚀性能有所改善。固溶处理后焊缝析出大量θ′强化相，母材在500℃固溶后析出δ′/β′纳米强化相，因而焊缝和母材的强度显著提升。

关键词(KeyWords)： 铝锂合金;激光焊接;固溶处理;硬度;腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 陕西省重点研发计划(2022GY-410);; 中央高校基本科研业务费(D5000220143)

作者(Author): 袁寅啸,李凯,刘明远,王楠,雷晓维

DOI: 10.13289/j.issn.1009-6264.2022-0237

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