Effect of pulse frequency on droplet transfer and weld formation in local dry underwater welding

A novel process of ultrasonic-assisted underwater wet arc welding was proposed to improve the joint properties, a number of ultrasonic-assisted underwater welding experiments were then carried out, and the effects of pulse frequency on weld formation, joint hardness and microstructure were investigated. Experimental results show that the ultrasonic frequency pulsation of arc can improve weld penetration while reducing effectively the hardness of joint HAZ in the arc axial direction and refining the grain of microstructure, and the effects of which are related closely to the pulse frequency.

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Effect of Different Excitation Currents on Droplet Transfer and Weld Formation of Al-Mg-Si Alloy CMT MIX + Synchropulse Welded Joint

Materials Letters ◽

10.1016/j.matlet.2021.130311 ◽

2021 ◽

pp. 130311

Author(s):

Peng-Cheng Huan ◽

Xia Wei ◽

Xiao-Nan Wang ◽

Xia-Ming Chen ◽

Wen-Gang Chen ◽

...

Keyword(s):

Welded Joint ◽

Droplet Transfer ◽

Weld Formation

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The Influence of Laser Power and Butt Gap on the Droplet Transfer and Weld Formation of Laser Arc Hybrid Welding

Journal of Physics Conference Series ◽

10.1088/1742-6596/2002/1/012009 ◽

2021 ◽

Vol 2002 (1) ◽

pp. 012009

Author(s):

Haohao Jing ◽

Xin Ye ◽

Xiaoqi Hou ◽

Xiaoyan Qian ◽

Peilei Zhang ◽

...

Keyword(s):

Laser Power ◽

Hybrid Welding ◽

Droplet Transfer ◽

Weld Formation

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Droplet transfer behavior and weld formation of gas metal arc welding for high nitrogen austenitic stainless steel

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2021.03.048 ◽

2021 ◽

Vol 65 ◽

pp. 491-501

Author(s):

Yang Dongqing ◽

Xiong Hanying ◽

Huang Yong ◽

Yan Dejun ◽

Li Dong ◽

...

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Arc Welding ◽

Gas Metal Arc Welding ◽

Droplet Transfer ◽

High Nitrogen ◽

Weld Formation ◽

Metal Arc Welding ◽

Transfer Behavior

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The Influence of Longitudinal Magnetic Field on DCEN MAG Welding

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.217-219.1843 ◽

2012 ◽

Vol 217-219 ◽

pp. 1843-1846 ◽

Cited By ~ 1

Author(s):

Xu Ming Wang ◽

Wen Zhang ◽

Ying Wang

Keyword(s):

Magnetic Field ◽

Dynamic Process ◽

Longitudinal Magnetic Field ◽

Mag Welding ◽

Droplet Transfer ◽

Weld Formation ◽

Magnetic Parameters ◽

Welding Arc

This paper introduces the dynamic process of droplet transfer of DCEN MAG welding applied outside longitudinal magnetic field, and analyses the influence law of magnetic parameters on welding arc, droplet transfer behaviour, wire melting coefficient and weld formation. The feasibility of application of longitudinal magnetic field to DCEN MAG welding is established. We compared DCEN MAG welding with DCEP in order to further perfect rotating MAG welding.

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The Effect of Hybrid Ultrasonic Pulse Current Parameters on VPTIG Arc Pressure and Weld Formation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.704-705.770 ◽

2011 ◽

Vol 704-705 ◽

pp. 770-774 ◽

Cited By ~ 2

Author(s):

Bo Jin Qi ◽

Wei Li ◽

Bao Qiang Cong ◽

Ming Xuan Yang

Keyword(s):

Arc Welding ◽

Pulse Current ◽

Welding Process ◽

Pulse Frequency ◽

Ultrasonic Pulse ◽

Duty Ratio ◽

Weld Penetration ◽

Weld Formation ◽

Arc Pressure ◽

Proper Frequency

Based on a novel arc welding device which can provide hybrid ultrasonic pulse current, the effect of hybrid pulsed current parameters on the arc pressure and weld formation during the aluminum alloy welding process was investigated. The experiment results show that, compared with normal VPTIG process, hybrid ultrasonic pulse VPTIG process gets greater arc pressure. Under the condition of keeping the RMS of positive current unchanged, lowering duty ratio has an evident effect on increasing arc pressure. At proper frequency range, increasing the pulse frequency and decreasing the pulse duty ratio can increase the depth and width of the weld, improve weld penetration rate correspondingly, and be beneficial to improve weld quality.

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