为解决飞行器舵翼部件异种材料间的连接成型问题, 采用光纤激光对3 mm厚的GH4169与20Cr13平板在不同的焊接工艺参数下进行激光焊接试验, 并对焊缝进行X射线检测、显微组织观察及常温高温拉伸试验, 检测结果表明：离焦量为+2 mm时, 可获得内部气孔缺陷较少的焊缝; 线能量小于100 J/mm时, 利于避免微观热裂纹的产生; 激光功率取2.2 kW、焊接速度取30 mm/s、离焦量取+2 mm时, 常温抗拉强度最高, 且在较大参数范围内均可获得400 ℃、600 ℃拉伸性能优于20Cr13母材的焊缝。

In order to solve the problem of connection molding between dissimilar materials in aircraft rudder wing components, the laser welding tests was carried out on 3 mm thick GH4169 and 20Cr13 under different welding parameters. X-ray inspection, microstructure observation and tensile test of normal temperature and high temperature were performed on the welds, and the results showed that: when the defocus is +2 mm, the welds with less internal porosity defects can be obtained; when the line energy is less than 100 J/mm, it is beneficial to avoid the occurrence of microscopic hot cracks; when the laser power is 2.2 kW, the welding speed is 30 mm / s and the defocus is +2 mm, the weld with the highest tensile strength at normal temperature can be obtained, moreover, in the larger parameter range, welds with tensile strength of 400 ℃ and 600 ℃ better than 20Cr13 base metals can be obtained.