Research on Formation Process of Keyhole During Fiber Laser Deep Penetration Welding

被引：0

作者：

Zhao Le ^{[1
]}

Han Xue ^{[1
]}

Zou Jianglin ^{[1
]}

Zheng Kai ^{[2
]}

Xiao Rongshi ^{[1
]}

Wu Qiang ^{[1
]}

机构：

[1] Beijing Univ Technol, Inst Laser Engn, High Power & Ultrafast Laser Mfg Lab, Beijing 100121, Peoples R China

[2] CRRC Qingdao Sifang Co Ltd, Qingdao 266111, Shandong, Peoples R China

来源：

LASER & OPTOELECTRONICS PROGRESS | 2020年 / 57卷 / 07期

关键词：

fiber laser; deep penetration welding; modulation light-out; keyhole; penetration depth; PLASMA;

D O I：

10.3788/LOP57.071102

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In order to study the formation process of keyhole, in the fiber laser plate scanning welding of low carbon steel, experiment was carried out by modulating laser light-out time. Experimental results show that the formation process of keyhole is extremely rapid, and the whole formation time of a keyhole is in ms level. In low-speed welding, the formation process of keyhole includes three stages: rapid increase, slow increase, and roughly stabilized stage. During high-speed welding, the formation process of keyhole only includes rapid formation stage. Further experiments show that the formation time of keyhole is not exceeding the characteristic time of laser welding and the characteristic time of laser welding decreases with the increase of welding speed, which together explain why keyhole formation only includes the rapid formation stage in high-speed welding.

引用

页数：7

共 18 条

[1] A new approach to compute multi-reflections of laser beam in a keyhole for heat transfer and fluid flow modelling in laser welding [J].

Courtois, Mickael ;

Carin, Muriel ;

Le Masson, Philippe ;

Gaied, Sadok ;

Balabane, Mikhael .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2013, 46 (50)

[2] Direct observation of keyhole behaviour during pulse modulated high-power Nd:YAG laser irradiation [J].

Fujinaga, S ;

Takenaka, H ;

Narikiyo, T ;

Katayama, S ;

Matsunawa, A .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2000, 33 (05) :492-497

[3] Characteristics of plasma plume in fiber laser welding of aluminum alloy [J].

Gao, Ming ;

Chen, Cong ;

Hu, Ming ;

Guo, Lianbo ;

Wang, Zemin ;

Zeng, Xiaoyan .

APPLIED SURFACE SCIENCE, 2015, 326 :181-186

[4] Direct observation of keyhole plasma characteristics in deep penetration laser welding of aluminum alloy 6016 [J].

Jin, Xiangzhong ;

Zeng, Licheng ;

Cheng, Yuanyong .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2012, 45 (24)

[5] Absorption peaks depending on topology of the keyhole front and wavelength [J].

Kaplan, Alexander F. H. ;

Matti, Ramiz S. .

JOURNAL OF LASER APPLICATIONS, 2015, 27

[6] Elucidation of laser welding phenomena and factors affecting weld penetration and welding defects [J].

Katayama, Seiji ;

Kawahito, Yousuke ;

Mizutani, Masami .

LASER ASSISTED NET SHAPE ENGINEERING 6, PROCEEDINGS OF THE LANE 2010, PART 2, 2010, 5 :9-17

[7]

Li M, 2017, CHINESE J LASERS, V44

[8] Vision-based weld pool boundary extraction and width measurement during keyhole fiber laser welding [J].

Luo, Masiyang ;

Shin, Yung C. .

OPTICS AND LASERS IN ENGINEERING, 2015, 64 :59-70

[9] Characterisation of cw Nd:YAG laser keyhole dynamics [J].

Martin, B ;

Loredo, A ;

Pilloz, M ;

Grevey, D .

OPTICS AND LASER TECHNOLOGY, 2001, 33 (04) :201-207

[10]

Ren Y, 2017, CHINESE J LASERS, V44

← 1 2 →