5A05铝合金薄板搅拌摩擦焊装配因素对焊缝质量的影响

文中通过5A05铝合金薄板搅拌摩擦焊对接试验，进行了力学性能分析和X射线探伤，研究接头错边量和间隙量对搅拌摩擦焊对接接头缺陷和力学性能的影响。试验结果表明当错边量大于0.5 mm或间隙量大于0.8 mm时焊缝力学性能下降并伴随下压量增大和缺陷的产生，接头缺陷与拉伸试验断裂部位大多在焊缝前进侧。错边量和间隙量对铝合金薄板搅拌摩擦焊对接接头力学性能及内部质量有重要影响，为保证焊接生产质量，搅拌摩擦焊焊接过程中应该严格控制接头错边量和间隙量。

Influence of Assembly Parameters of 5A05 Aluminum Alloy Thin Plate Friction Stir Welding on Welding Quality

In this study, thin 5A05 aluminum alloy plates are welded by friction stir welding, mechanical property analysis and X-ray detection are performed,and the effect of the misalignment and clearance on the imperfections and mechanical properties of the joints are studied. It is found that when the amount of misalignment exceeds 0.5 mm and clearance exceeds 0.8 mm, the mechanical properties of the joint will degrade and the imperfections will begin to appear, which are mostly located at the advanced side. In order to improve the quality of the joint, the misalignment and clearance must be controlled strictly.