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为了解决小型薄壁铝合金球壳赤道焊接密封的技术问题,本研究针对薄壁铝合金球壳赤道开展了电子束焊接技术研究,采用不同的焊接束流对球壳赤道进行了焊接密封,考察了不同焊接束流下焊缝的成形、组织结构及焊后球壳的气密性和变形情况。结果表明,在1.0 m A的束流下,焊缝熔池发生坍塌,球壳变形量较大;而在0.8和0.6 m A情况下,尽管焊缝焊深不同,但是焊缝成形较好,气密性可满足工程要求,球壳变形量也较小。
In order to solve the technical problem of the equatorial welding of small thin-walled aluminum alloy spherical shell, the research on the electron beam welding of the thin-walled aluminum alloy spherical shell equator has been carried out. The welding of the spherical shell equator with different welding beam was studied. The weld formation, microstructure and the airtightness and deformation of the welded spherical shell under different welding beam currents were investigated. The results show that the weld pool collapses and the deformation of the spherical shell is large under the flux of 1.0 m A, while the weld formation is better at 0.8 and 0.6 m A, although the welding depth is different Density to meet the engineering requirements, the deformation of the spherical shell is also smaller.