空间多位置摆动激光填丝焊接熔池动态行为及焊缝成形

李军兆; 孙清洁; 张清华; 刘一搏; 甄祖阳; 康克新

doi:10.12073/j.hjxb.20210416001

空间多位置摆动激光填丝焊接熔池动态行为及焊缝成形

李军兆^{1, 2, 3,},
孙清洁^{1, 2, ,},
张清华³,
刘一搏^{1, 3},
甄祖阳³,
康克新^{1, 3}

1.
哈尔滨工业大学，先进焊接与连接国家重点实验室，哈尔滨，150001
2.
湖南湘投金天新材料有限公司，益阳，413000
3.
哈尔滨工业大学(威海)，特种焊接技术省重点实验室，威海，264209

基金项目: 国家重点研发计划项目(2016YFB0300602)；国家自然科学基金(U1960102)；山东省自然科学基金重点项目(ZR2020KE010)

详细信息

作者简介:
李军兆，博士研究生；主要从事激光焊接方法的研究；Email：ljzhao_hit@163.com

通讯作者:
孙清洁，教授，博士研究生导师；Email： qjsun@hit.edu.cn.

中图分类号: TG 456.7
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出版历程
- 收稿日期: 2021-04-15
- 网络出版日期: 2021-11-15
- 刊出日期: 2021-10-30

Research on molten pool dynamic behavior and weld formation of transverse oscillating laser welding process for various positions in space

LI Junzhao^{1, 2, 3,},
SUN Qingjie^{1, 2, ,},
ZHANG Qinghua³,
LIU Yibo^{1, 3},
ZHEN Zuyang³,
KANG Kexin^{1, 3}

1.
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
2.
Hunan Xiangtou Goldsky New Materials Co., Ltd., Yiyang, 413000, China
3.
Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, 264209, China

摘要

摘要: 以316L奥氏体不锈钢管道为研究对象，在摆动激光焊接研究基础上，对管道多位置激光填丝焊接熔滴过渡和焊缝成形展开研究，分析焊接熔池动态特征，优化各位置区间工艺参数，进而实现管道全位置激光焊接. 结果表明，摆动激光束周期性的作用于填充焊丝，产生的反冲压力能够促进熔滴过渡，使得焊丝始终以“液桥”形式向熔池过渡；同时摆动激光增强了熔融金属侧向流趋势，提高熔池界面表面张力，削弱空间多位置下重力对熔池形貌的影响，保证各空间位置熔池均能稳定存在，焊缝成形连续均匀.
- 空间多位置焊接 /
- 激光焊接 /
- 熔池动态行为 /
- 焊缝成形
Abstract: 316L austenite pipeline was used as experimental materials. Based on oscillating laser welding, the droplet transfer and weld morphology at various spatial positions were studied, and the molten pool characteristics and formation process were analyzed to optimize welding parameters, achieving pipeline all-position beam wobble lase wire feeding welding. The results show that transverse oscillating laser beam periodically irradiates on filler wire, it primarily provides a recoil force to promote droplet transfer in the form of liquid bridge transition. Meanwhile, oscillating laser beam increases lateral flowing trend of molten weld metal, increasing surface tension force at molten pool edge. The effect of gravity on molten pool is weakened, ensuring the stable existence of liquid metal at various welding positions. The weld surface formation is continuous and uniform.
- various position at space /
- laser welding /
- molten pool dynamic behaviou /
- weld formation

HTML全文

图 1 空间的多位置激光填丝焊接示意图

Figure 1. Schematic diagram of laser wire feeding welding process for various positions in space

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图 2 摆动激光填丝焊接焊丝熔化与熔池形成动态过程

Figure 2. Dynamic melting of filler wire and formation of molten pool with beam wobble welding. (a) t₀ ms; (b) t₀ +2.5 ms; (c) t₀ +3.5 ms; (d) t₀ +5.0 ms;

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图 3 焊缝表面成形

Figure 3. Weld surface forming. (a) transverse oscillating laser welding; (b) conventional laser wire feeding welding

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图 4 典型向下位置激光焊熔池行为

Figure 4. Melting pool characteristics of laser welding in downward positions. (a) 0°; (b) 45°; (c) 90°; (d) 135°

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图 5 典型向上位置激光焊熔池行为

Figure 5. Melting pool characteristics of laser welding in upward positions. (a) 180°; (b) 225°; (c) 270°; (d) 315°

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图 6 不同空间位置下的焊缝表面成形

Figure 6. Weld surface forming at various positions. (a) 0°; (b) 45°; (c) 90°; (d) 135°; (e) 180°; (f) 225°; (g) 270°; (h) 315°

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图 7 典型位置下的焊缝横截面形状参数

Figure 7. Weld cross section morphology at various positions

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