Influence of wire feeding speed on the melting behavior and formation of narrow-gap joint by laser welding with filler wire

2020 ◽  
Vol 32 (3) ◽  
pp. 032007
Author(s):  
Jihong Pu ◽  
Yong Zhao ◽  
Yumo Jiang ◽  
Jiasheng Zou ◽  
Shuming Song
Keyword(s):  
Laser Welding ◽  
Melting Behavior ◽  
Filler Wire ◽  
Narrow Gap ◽  
Feeding Speed ◽  
Wire Feeding

Melting behavior in ultrasonic-assisted narrow-gap laser welding with filler wire

2021 ◽  
Vol 33 (1) ◽  
pp. 012058
Author(s):  
Xiang Chen ◽  
Juan Fu ◽  
Yong Zhao ◽  
Yumo Jiang ◽  
Keng Yan ◽  
...  
Keyword(s):  
Laser Welding ◽  
Melting Behavior ◽  
Filler Wire ◽  
Narrow Gap ◽  
Ultrasonic Assisted

Droplet transfer behavior of narrow gap laser wire filling welding

2019 ◽  
Vol 33 (01n03) ◽  
pp. 1940045 ◽  
Author(s):  
Z. Zhang ◽  
R. Wang ◽  
G. Gou ◽  
H. Chen ◽  
W. Gao
Keyword(s):  
Welding Speed ◽  
High Speed ◽  
Transition Period ◽  
High Speed Photography ◽  
Narrow Gap ◽  
Droplet Transfer ◽  
Transfer Behavior ◽  
Feeding Speed ◽  
Wire Feeding ◽  
Droplet Transition

In this paper, we study the droplet transition behavior of narrow gap laser wire filling welding under the condition of changing welding speed and wire feeding speed, and it was observed by high-speed photography. It was found that with the increase of welding speed, the frequency of droplet transfer was reduced and the transition period was prolonged. With the increase of wire feeding speed, the wire was not fully melted and finally inserted into the molten pool.

Microstructures and Properties of Ultra-Narrow-Gap Multi-Pass Welded Joint of 50 mm Turbine Rotor Steel by Laser Welding with Filler Wire

2015 ◽  
Vol 42 (2) ◽  
pp. 0203007
Author(s):  
赵勇 Zhao Yong ◽  
王清曌 Wang Qingzhao ◽  
黄坚 Huang Jian ◽  
吴毅雄 Wu Yixiong
Keyword(s):  
Laser Welding ◽  
Welded Joint ◽  
Turbine Rotor ◽  
Rotor Steel ◽  
Filler Wire ◽  
Narrow Gap

Narrow-gap laser welding using filler wire of thick steel plates

2017 ◽  
Vol 93 (5-8) ◽  
pp. 2955-2962 ◽  
Author(s):  
Yong Zhao ◽  
Shengchong Ma ◽  
Jian Huang ◽  
Yixiong Wu
Keyword(s):  
Laser Welding ◽  
Steel Plates ◽  
Filler Wire ◽  
Narrow Gap ◽  
Thick Steel

Microstructures and Properties of 50 mm Thick SA508Gr.3Cl.2 Steel Welding Joints by Ultra-Narrow-Gap Laser Welding with Filler Wire

2017 ◽  
Vol 44 (11) ◽  
pp. 1102006 ◽  
Author(s):  
张益文 Zhang Yiwen ◽  
张茂龙 Zhang Maolong ◽  
孙志远 Sun Zhiyuan ◽  
黄 坚 Huang Jian ◽  
姚成武 Yao Chengwu ◽  
...  
Keyword(s):  
Laser Welding ◽  
Filler Wire ◽  
Narrow Gap ◽  
Welding Joints

scholarly journals The Dilution Effect in High-Power Disk Laser Welding the Steel Plate Using a Nickel-Based Filler Wire

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 874
Author(s):  
Ming-Feng Chiang ◽  
Tzu-Yuan Lo ◽  
Ping-Hui Chien ◽  
Chih-Hsien Chi ◽  
Kai-Chun Chang ◽  
...  
Keyword(s):  
Laser Welding ◽  
Weld Pool ◽  
High Power ◽  
Feeding Rate ◽  
Steel Plate ◽  
Lower Amount ◽  
Filler Wire ◽  
Disk Laser ◽  
Bcc Structure ◽  
Wire Feeding

High-power disk laser welding a steel plate using the Inconel 82 (IN82) filler wire with a 1.2 and 3.0 m/min feeding rate has been investigated in the experiment. The rapid thermal cycle combined with convection induced by the keyhole mechanism in laser welding results in the rapid solidification of the fusion zone (FZ). However, the microstructure of the FZ is not homogeneous at the macroscopic scale. The dilution of the FZ is important in determining the final microstructure of the weldment. For the specimen with a 1.2 m/min wire feeding rate, a lower amount of Ni-based IN82 filler is introduced into the weld pool, and the dilution of the FZ is between 65% and 100%. The BCC structure with high density boundaries dominates the entire FZ. For the specimen with a 3.0 m/min wire feeding rate, part of the filler melt is trapped on the top of the weld pool, and solidified into austenite alloyed with a Ni concentration above 15 at%. The range of dilution in the FZ with a 3.0 m/min wire feeding rate is decreased to 50–90%. There are hot cracks initiated/propagated along interdendritic austenite and in the austenite free of boundaries. Boundaries, especially for high-angle ones, in the BCC structure retard hot crack propagation in the FZ. The application of quantitative chemical analyses of Fe or Ni concentrations in the weldment provides a good approximation in evaluating the dilution of the FZ in laser welding. The methodology proposed in this study shows potential to obtain the dilution of any specific location in the FZ for industrial application in the future.

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