Effect of boric acid on metal transfer mode of underwater flux-cored wire wet welding

2015 ◽  
Vol 223 ◽  
pp. 124-128 ◽  
Author(s):  
Ning Guo ◽  
Wei Guo ◽  
Yongpeng Du ◽  
YunLong Fu ◽  
Jicai Feng
Keyword(s):  
Boric Acid ◽  
Metal Transfer ◽  
Cored Wire ◽  
Transfer Mode ◽  
Metal Transfer Mode

Effect of metal transfer mode on spatter and arc stability in underwater flux-cored wire wet welding

2018 ◽  
Vol 35 ◽  
pp. 161-168 ◽  
Author(s):  
Yunlong Fu ◽  
Ning Guo ◽  
Yongpeng Du ◽  
Hao Chen ◽  
Changsheng Xu ◽  
...  
Keyword(s):  
Metal Transfer ◽  
Cored Wire ◽  
Transfer Mode ◽  
Arc Stability ◽  
Metal Transfer Mode

Effects of welding velocity on metal transfer mode and weld morphology in underwater flux-cored wire welding

2017 ◽  
Vol 239 ◽  
pp. 103-112 ◽  
Author(s):  
Ning Guo ◽  
Yunlong Fu ◽  
Yongpeng Wang ◽  
Yongpeng Du ◽  
Jicai Feng ◽  
...  
Keyword(s):  
Metal Transfer ◽  
Cored Wire ◽  
Transfer Mode ◽  
Metal Transfer Mode

scholarly journals Analysis of Metal Transfer and Weld Forming Characteristics in Triple-wire Gas Indirect Arc Welding

2021 ◽  
Author(s):  
Liming Liu ◽  
Zeli Wang ◽  
Tianyi Zhang ◽  
Xianli Ba
Keyword(s):  
Electromagnetic Force ◽  
Arc Welding ◽  
Metal Transfer ◽  
Force Model ◽  
High Deposition Rate ◽  
Transfer Mode ◽  
Conductive Channel ◽  
Forming Characteristics ◽  
Metal Transfer Mode ◽  
Indirect Arc

Abstract Triple-wire gas indirect arc welding (TW-GIA) has the advantages of low heat input and high deposition rate. However, the simultaneous melting of triple wires makes the metal transfer mode complicated. The unknown of the metal transfer mode restricts the development of this technology. In this paper, high-speed camera systems and electrical signal acquisition sensors were used to explore the TW-GIA metal transfer mode. The static force model and the arc conductive channel model were used to discuss the droplet force and energy conversion characteristics respectively. Results showed that the TW-GIA metal transfer modes can be divided into: short-circuit transfer (SCT), main wire projected transfer + side wire globular transfer (PGT), main wire streaming transfer + side wire projected transfer (SPT) and main wire streaming transfer + side wire streaming transfer (SST). Moreover, the process parameter ranges corresponding to the four modes were summarized. Due to the stable arc and the uniform metal transfer process, SPT and SST can form desirable weld seam. The gravity and z-axis components of electromagnetic force are the main forces that promote metal transfer. The x-axis and y-axis components of the electromagnetic force deviate the metal transfer path from the arc coverage. Due to the change of arc conductive channel, the energy transferred from TW-GIA to the base metal is less than that of GMAW, showing the advantages of small welding deformation, narrow heat affected zone and grain refinement.

The Effect of Voltage and Metal Transfer Mode on Particulate Fume Size During the GMAW of Plain Carbon Steel

2010 ◽  
Vol 54 (9-10) ◽  
pp. R249-R256 ◽  
Author(s):  
Zoran Sterjovski ◽  
John Norrish ◽  
Brian J. Monaghan
Keyword(s):  
Carbon Steel ◽  
Plain Carbon Steel ◽  
Metal Transfer ◽  
Transfer Mode ◽  
Metal Transfer Mode

Effects of Welding Current on Metal Transfer and Weld Pool Dynamics in Gas Metal Arc Welding

2006 ◽  
Author(s):  
J. Hu ◽  
H. L. Tsai ◽  
P. C. Wang
Keyword(s):  
Weld Pool ◽  
Arc Welding ◽  
Gma Welding ◽  
Gas Metal Arc Welding ◽  
Metal Transfer ◽  
Dominant Factor ◽  
Transient Temperature ◽  
Transfer Mode ◽  
Metal Arc Welding ◽  
Metal Transfer Mode

In gas metal arc welding (GMAW), current is one of the most important factors affecting the mode of metal transfer and subsequently the weld quality. Recently, a new technology using pulsed currents has been employed to achieve the one droplet per pulse (ODPP) metal transfer mode with the advantages of low average currents, a stable and controllable droplet generation, and reduced spatter. In this paper, the comprehensive model recently developed by the authors was used to study the influences of different current profiles on the droplet formation, metal transfer, and weld pool dynamics in GMA, welding. Five types of welding currents were studied, including two constant currents and three waveform currents. In each type, the transient temperature and velocity distributions of the arc plasma and the molten metal, and the shapes of the droplet and the weld pool were calculated. The results showed that a higher electromagnetic force was generated at a higher current and becomes the dominant factor that detaches the droplet from the electrode tip. A smaller droplet size and a higher droplet frequency were obtained for a higher current. The model has demonstrated that a stable ODPP metal transfer mode can be achieved by choosing a current with proper waveform for given welding conditions.

Study on the Incline Limit in Gas Metal Arc Welding Based Rapid Forming

2011 ◽  
Vol 189-193 ◽  
pp. 766-770 ◽  
Author(s):  
Feng Liang Yin ◽  
Sheng Zhu ◽  
Jian Liu ◽  
Qi Wei Wang
Keyword(s):  
Welding Speed ◽  
Arc Welding ◽  
Short Circuit ◽  
Gas Metal Arc Welding ◽  
Metal Transfer ◽  
Forming Process ◽  
Transfer Mode ◽  
Metal Arc Welding ◽  
Supporting Material ◽  
Metal Transfer Mode

The paper defined a concept of the utmost shapeable angle for the gas metal arc welding based rapid forming process, which is used to judge supporting material need to be employed or not when a inclined wall is deposited. If the angle formed by the outer normal of the inclined wall and building direction exceeds the sum of the utmost shapeable angle and π/2, then supporting material must be deposited to finish the inclined wall along the given building direction. The effects of metal transfer mode and welding speed on the utmost shapeable angle were studied. It is found that the ‘one droplet per pulse’ metal transfer mode in pulse-current welding based RP may obtain a bigger utmost shapeable angle than short circuit metal transfer mode does. The welding speed influences the utmost shapeable angle through heat input and bead profile. An abrupt bead is harmful to get a bigger utmost shapeable angle. Within a welding speed extension from 9 mm/s to 30 mm/s, the utmost shapeable angle gets the maximum value of 55° when the welding speed is 18 mm/s.

Effect of Laser Beam on Double Wire Pulsed MIG Welding Process

2011 ◽  
Vol 130-134 ◽  
pp. 4169-4173
Author(s):  
Li Yan Lou ◽  
Huan Li ◽  
Xu You Wang ◽  
Wei Wang ◽  
Ying Gao
Keyword(s):  
Laser Beam ◽  
High Speed ◽  
Welding Process ◽  
Welding Current ◽  
Metal Transfer ◽  
Wave Form ◽  
Hybrid Welding ◽  
Transfer Mode ◽  
Metal Transfer Mode ◽  
Set Up

Based on the coupling of laser beam and double arcs, a novel process was investigated. This research set up the laser-double wire pulsed MIG hybrid welding system. Meanwhile the current and voltage sensors were used to detect welding current and arc voltage wave-form and high-speed videography system was used to observe the metal transfer process and arc behavior. The three signals were acquired synchronously. The results showed that the synergic action of the three different heat sources leads to a change in metal transfer mode. It was revealed that the metal transfer mode was two droplets per pulse in laser-double wire hybrid welding process while one droplet per pulse in double wire welding process with the same certain experiment parameters. And we also discovered that the arcs were attracted strongly by the laser beam.

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