航天推进技术研究院主办
[1]宋 凡,潘 攀,陈晓江,等.大熔深激光焊气孔抑制技术[J].火箭推进,2019,45(06):84-89.
SONG Fan,PAN Pan,CHEN Xiaojiang,et al.Porosity suppression technology for large-depth laser welding[J].Journal of Rocket Propulsion,2019,45(06):84-89.
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SONG Fan,PAN Pan,CHEN Xiaojiang,et al.Porosity suppression technology for large-depth laser welding[J].Journal of Rocket Propulsion,2019,45(06):84-89.
大熔深激光焊气孔抑制技术
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
45
期数:
2019年06期
页码:
84-89
栏目:
工艺与材料
出版日期:
2019-12-25
- Title:
- Porosity suppression technology for large-depth laser welding
- 文章编号:
- 1672-9374(2019)06-0084-06
- 分类号:
- TG456.7
- 文献标志码:
- A
- 摘要:
- 针对空间发动机中频繁出现的大熔深激光焊需求,以及随之而来的工艺性气孔超标问题,在3种工艺模式下开展了气孔抑制技术研究:一为非熔透焊模式、稍快焊接速度、正向大幅提高离焦量(≥4 mm)、负方向适当倾斜入射(-10°)和辅以大功率补偿熔深; 二为非熔透焊模式、普通焊接速度、正向少许提高离焦量、垂直入射、特定扫描波形(O形)、特定扫描频率(100～150 Hz)和特定扫描幅度(0.4～0.6 mm); 三为稳定熔透焊模式、稍慢焊接速度、表面聚焦、垂直入射、调整功率保证焊缝背宽比介于适宜范围内(0.45～0.65)。最终试验结果显示在4 mm熔深前提下,3种方法皆可将焊缝气孔率控制在5%以下,满足航天焊接标准的II级质量要求,且采用最佳工艺规范焊接的产品已通过了飞行试验考核。
- Abstract:
- Aiming at the frequent demand for deep penetration laser welding in space engines, and the consequent problem of process porosity, researches on porosity suppression technology were carried out in three process modes.The first type is a non-fusion welding mode, slightly faster welding speed, positively increasing the amount of defocus(≥4 mm), proper oblique incidence in the negative direction(-10°), and supplemental high power.The second type is a non-fusion welding mode, common welding speed, positive defocusing amount, vertical incidence, shaped scanning wave(O-shape), scanning frequency(100～150 Hz), and scanning amplitude(0.4～0.6 mm).The third type is a stable penetration welding mode, slightly slower welding speed, surface focusing, vertical incidence, and appropriate power to ensure the back-width ratio between an appropriate zone(0.45～0.65).Final results show that under the premise of 4mm penetration depth, all of the three methods can control the porosity of the weld to below 5%, which meets the second-level quality requirements of the aerospace welding standard.Meanwhile, the products with the best process specifications have passed the flight test.
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备注/Memo
收稿日期:2018-10-07; 修回日期:2019-03-23基金项目:装发部预研航天科技联合基金项目; 上海市科学技术委员会资助课题(17DZ2280800)作者简介:宋 凡(1989—),男,硕士,研究领域为空间推进系统激光焊接工艺技术
更新日期/Last Update:
2019-12-20