Microstructure and property of copper laser welding joint assisted by the surface pretreated by nanosecond laser direct writing

ZHOU Guangtao; KUANG Jingzhen; WEN Qiuling; CAI Zupeng; SU Liji

doi:10.12073/j.hjxb.20220908002

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2023 > 44(4): 21-29. > DOI: 10.12073/j.hjxb.20220908002

ZHOU Guangtao, KUANG Jingzhen, WEN Qiuling, CAI Zupeng, SU Liji. Microstructure and property of copper laser welding joint assisted by the surface pretreated by nanosecond laser direct writing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2023, 44(4): 21-29. DOI: 10.12073/j.hjxb.20220908002

Citation:

PDF (4873 KB)

Microstructure and property of copper laser welding joint assisted by the surface pretreated by nanosecond laser direct writing

1.
Fujian Key Laboratory of Special Energy Field Manufacturing, Huaqiao University, Xiamen, 361021, China
2.
Institute of Manufacturing Engineering, Huaqiao University, Xiamen, 361021, China;
3.
Product Development Research Center, Xiamen Hongfa Electric Power Controls Co.,Ltd., Xiamen, 361021, China

More Information

Received Date: September 07, 2022
Available Online: April 16, 2023

Graphical Abstract

Abstract

Abstract

In order to improve the laser absorption rate of copper, a method of copper laser welding assisted by the surface pretreated by the nanosecond laser direct writing was proposed. Nanosecond laser was used to write directly on the surface of copper to produce period microstructure covered by nanoparticles. The pretreated surface could effectively absorb the fiber laser and improve the laser absorption rate to ensure a smooth laser welding of copper. The mechanism of the pretreated surface reducing the reflection of copper was illustrated, the influence of welding process parameters on the weld formation was studied, and the microstructure and mechanical properties of the weld were analyzed. The results showed that surface nano-particles can effectively reduce the laser reflectivity of copper. With the increase of welding laser power, the weld appearance altered from a shape of wide- and-shallow to narrow-and-deep shape. The microstructure was dendritic crystals based on copper grain at the boundary of bond line at partial melting region, and the tails of dendritic crystals were curved towards the welding direction, instead of growing toward the axis of weld, and the bunches of dendritic crystals were uniform in thickness. Line scanning images showed that the treatment of laser direct writing barely had any effect on the metallurgical behavior of the copper welds, and there was only a small amount of oxygen in the range of 53 μm from the weld surface. Besides the single-phase solid solution of copper, there wasn't any heterogeneous such as oxygen introduced in the weld. The tensile strength of the joint was 81.4% of that of the base metal, and the hardness of the weld center was 65.8HV0.1. The fracture was ductile, and the weld remained certain plasticity.
- nanosecond laser direct writing,
- laser absorption rate,
- laser welding,
- weld appearance

FullText(HTML)

References (15)

References

Wei Guoqiang, Liu Henglin, Du Longchun, et al. Effect of electromigration and isothermal aging on interfacial microstructure and tensile fracture behavior of SAC305/Cu solder joint[J]. China Welding, 2016, 25(3): 42 − 48.

Keunhee L, Hyungson K. Enhancing coupling efficiency in laser keyhole welding of copper using femtosecond laser surface modification[J]. Optics & Laser Technology, 2021, 139: 106943.

Eric P, Florian Hugger, Robert D, et al. Comparison of different system technologies for continuous-wave laser beam welding of copper[J]. Procedia CIRP, 2020, 94: 587 − 591. doi: 10.1016/j.procir.2020.09.081

于汉臣, 闫涵, 栾天旻, 等. 紫铜厚板GTAW热裂纹形成原因分析[J]. 焊接学报, 2018, 39(8): 87 − 91.

Yu Hanchen, Yan Han, Luan Tianmin, et al. Investigation on the cause of the hot cracking in GTA welding of thick copper plates[J]. Transactions of the China Welding Institution, 2018, 39(8): 87 − 91.

陈梅峰, 周广涛, 吴世凯, 等. 基于紫铜填充中间层的黄铜激光焊接气孔控制[J]. 中国激光, 2019, 46(3): 122 − 132.

Chen Meifeng, Zhou Guangtao, Wu Shikai, et al. Plastic gradient coordination behavior of boron steel/Q235 steel laser welded joint under welding with synchronous thermal field[J]. Chinese Journal of Lasers, 2019, 46(3): 122 − 132.

Maina M R, Okamoto Y, Hamada K, et al. Effects of superposition of 532 nm and 1 064 nm wavelengths in copper micro-welding by pulsed Nd:YAG laser[J]. Journal of Materials Processing Technology, 2022, 299: 117388.

Zediker M S, Fritz R D, Finuf M J, et al. Stable keyhole welding of 1 mm thick copper with a 600 W blue laser system[J]. Journal of Laser Applications, 2019, 31: 022404. doi: 10.1016/j.jmatprotec.2021.117388

Engler S, Ramsayer R, Poprawe R. Process studies on laser welding of copper with brilliant green and infrared lasers[J]. Physics Procedia, 2011, 12(1): 339 − 346. doi: 10.1016/j.matlet.2020.128700

郝庆波. 薄铜板的激光焊技术研究[D]. 长春: 吉林大学, 2007.

Hao Qingbo. Study on the welding of thin copper plate with YAG laser[D]. Changchun: Jilin University, 2007.

Chen H C, Bi G J, Nai M L S, et al. Influence of surface condition in fiber laser welding of pure copper[C]//International Congress on Applications of Laser & Electro-Optics(ICALEO). Anaheim, California, USA, 2012 (1): 558 − 564.

Genc Oztoprak B, Akman E, Hanon M M, et al. Laser welding of copper with stellite 6 powder and investigation using LIBS technique[J]. Optics & Laser Technology, 2013, 45: 748 − 755.

雷玉成, 韩明娟, 王健, 等. 紫铜的激光焊方法: 中国, CN200910035281.3[P]. 2015-12-31.

Lei Yucheng, Han Mingjuan, Wang Jian, et al. Method of copper laser welding: China, CN200910035281.3[P]. 2015-12-31.

焦俊科, 王飞亚, 孙加强, 等. 紫铜表面预处理及激光焊工艺研究[J]. 激光与光电子学进展, 2016, 53(3): 164 − 169.

Jiao Junke, Wang Feiya, Sun Jiaqiang, et al. Study on copper surface pre-treating and welding with fiber lasers[J]. Laser & Optoelectronics Progress, 2016, 53(3): 164 − 169.

吴晓红,向发午,刘勇,等. 紫铜激光焊接工艺研究[J]. 应用激光, 2013, 33(2): 169 − 172.

Wu Xiaohong, Xiang Fawu, Liu Yong, et al. Study on laser welding of copper[J]. Applied Laser, 2013, 33(2): 169 − 172.

李华晨, 周广涛, 陈梅峰, 等. 分步气体介质下低功率激光焊薄板紫铜成形及组织和性能[J]. 焊接学报, 2020, 41(10): 65 − 72,101.

Li Huachen, Zhou Guangtao, Chen Meifeng, et al. Research on laser welding formability and micro-structure property of copper in stepwise gas medium[J]. Transactions of the China Welding Institution, 2020, 41(10): 65 − 72,101.

[1]	XU Nan, XU Yuzhui, GAO Tianxu, SONG Qining, BAO Yefeng. The influence of welding thermal cycle on the grain structure of friction stir welded 5083 aluminum alloy joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION. DOI: 10.12073/j.hjxb.20240315001
[2]	XIAO Wenbo, HE Yinshui, YUAN Haitao, MA Guohong. Synchronous real-time detection of weld bead geometry and the welding torch in galvanized steel GAMW[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(12): 78-82. DOI: 10.12073/j.hjxb.20201021001
[3]	CUI Bing1,2, PENG Yun2, PENG Mengdu2, AN Tongbang2. Effects of weld thermal cycle on microstructure and properties of heataffected zone of Q890 processed steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(7): 35-39. DOI: 10.12073/j.hjxb.20150427004
[4]	LIU Haodong, HU Fangyou, CUI Aiyong, LI Hongbo, HUANG Fei. Experimental on thermal cycle of laser welding with ultrasonic processing across different phases[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(8): 13-17.
[5]	LÜ Xiaochun, HE Peng, QIN Jian, DU Bing, HU Zhongquan. Effect of welding thermal cycle on microstructure and properties of intercritically reheated coarse grained heat affected zone in SA508-3 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(12): 47-49.
[6]	WU Dong, LU Shanping, LI Dianzhong. Effect of welding thermal cycle on high temperature mechanical property of Ni-Fe base superalloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(9): 69-72.
[7]	HU Yanhua, CHEN Furong, XIE Ruijun, LI Haitao. Designment of test program system for welding thermal cycle in weld zone[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (5): 93-96.
[8]	HU Yanhua, CHEN Furong, XIE Ruijun, LI Haitao. In-situ detection of weld metal thermal cycle of 10CrMo910 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (10): 105-107.
[9]	CHEN Yu-hua, WANG Yong. Numerical simulation of thermal cycle of in-service welding onto active pipeline based on SYSWELD[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (1): 85-88.
[10]	YAO Shang-wei, ZHAO Lu-yu, XU Ke, WANG Ren-fu. Effect of welding thermal cycle on toughness of continuous cast-ing steel center[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2006, (10): 97-100.

Cited By

Cited by

Periodical cited type(1)

温淳杰，姚屏，范谨锐，曾祥坤，喻小燕，武威. 316L不锈钢和镍基合金梯度材料MIG焊电弧增材制造工艺研究. 精密成形工程. 2024(10): 208-216 .

Other cited types(1)

Get Citation

PDF

XML

Article views (274) PDF downloads (48) Cited by(2)

Turn off MathJax

Article Contents

Abstract

References

Microstructure and property of copper laser welding joint assisted by the surface pretreated by nanosecond laser direct writing