分析不同激光焊接工艺参数下焊缝的微观组织特征,并测试焊缝的力学性能.结果表明:TC4钛合金激光焊接焊缝为针状马氏体α'组成的网篮组织和少量α'相;随着焊接热输入量的增加,由于熔池搅拌、焊接应力、合金元素烧损等原因,马氏体的分布更加散乱和密集;焊接工艺参数对焊缝相组成和各相相对含量的影响均不显著.合理的焊接工艺参数下,接头的强度高于母材.
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