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波长对激光-CMT复合焊熔滴过渡行为的影响

Effect of Wavelength on Droplet Transition Behaviors in Laser-CMT Hybrid Welding Process

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摘要

通过激光-CMT复合焊试验, 研究了激光波长对熔滴过渡行为的影响。结果表明, 激光通过改变熔池形态和加热焊丝影响了熔滴过渡过程, 激光-CMT复合焊过程比CMT焊接过程稳定。CO2激光对熔滴体积的影响较大, 当CO2激光功率较小时, 激光可以促进熔滴过渡; 当CO2激光功率增大后激光会阻碍熔滴过渡。光纤激光对焊丝加热的作用较小, 但可以增大熔滴过渡频率。CO2激光和光纤激光等离子体温度均随激光功率的增大而升高, 但CO2激光等离子体呈团状喷发, 而光纤激光等离子体几乎不喷发。

Abstract

The effect of laser wavelength on the droplet transition behaviors is studied in the laser-CMT hybrid welding process. The results show that, the droplet transfer process is influenced when the molten pool shape and wire-heating are changed by the laser, and the laser-CMT hybrid welding process is more stable than the CMT welding process. The CO2 laser has a relatively strong influence on the droplet volume. When the CO2 laser power is relatively low, the laser can promote the droplet transition. However, the laser prevents the droplet transition process when the laser power increases. The fiber laser has a less effect on the wire-heating, but can increase the transition frequency of droplets. The plasma temperatures from the CO2 laser and fiber laser increase with the increase of the laser power. The plasma by the CO2 laser presents a lump-like eruption but that by the fiber laser shows no eruption.

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中图分类号:TG456.7

DOI:10.3788/cjl201845.1002006

所属栏目:激光制造

收稿日期:2018-04-24

修改稿日期:2018-05-23

网络出版日期:2018-06-04

作者单位    点击查看

雷正龙:哈尔滨工业大学先进焊接与连接国家重点实验室, 黑龙江 哈尔滨 150001
黎炳蔚:哈尔滨工业大学先进焊接与连接国家重点实验室, 黑龙江 哈尔滨 150001
朱平国:上海航天动力技术研究所, 上海 201109
陆韡:上海航天动力技术研究所, 上海 201109
邢希学:上海航天动力技术研究所, 上海 201109

联系人作者:黎炳蔚(282033441@qq.com); 雷正龙(leizhenglong@hit.edu.cn);

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引用该论文

Lei Zhenglong,Li Bingwei,Zhu Pingguo,Lu Wei,Xing Xixue. Effect of Wavelength on Droplet Transition Behaviors in Laser-CMT Hybrid Welding Process[J]. Chinese Journal of Lasers, 2018, 45(10): 1002006

雷正龙,黎炳蔚,朱平国,陆韡,邢希学. 波长对激光-CMT复合焊熔滴过渡行为的影响[J]. 中国激光, 2018, 45(10): 1002006

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