Topic
Gas metal arc welding
About: Gas metal arc welding is a research topic. Over the lifetime, 11706 publications have been published within this topic receiving 109555 citations. The topic is also known as: metal active gas welding & GMAW.
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TL;DR: In this paper, a bead on plate welding on a low carbon steel plate at different parameter combinations in double-pulsed gas metal arc welding (DP-GMAW) process has been carried out, and the effect of heat input, pulse frequency and thermal pulse frequency on solidification variables and microstructure of the weld metal have been thoroughly studied.
37 citations
Journal Article•
TL;DR: In this paper, the effects of welding current, drop volume, contact area, and wire feed rate on metal transfer are analyzed through variations of the pinch radius and break-up time, and a current waveform on the characteristics of the metal transfer also are simulated.
Abstract: Short-circuit transfer is simulated dynamically by adopting the Volume of Fluid (VOF) method to analyze the effects of welding parameters on metal transfer. Appropriate initial and boundary conditions are imposed to simulate short-circuit transfer. The free surface profiles, pressure and velocity distributions are computed numerically during short-circuit transfer. The effects of the welding current, drop volume, contact area and wire feed rate on metal transfer are analyzed through variations of the pinch radius and break-up time. In the early stage of transfer, the molten metal in the bridge is transferred to the weld pool mainly due to the capillary pressure. The electromagnetic force becomes a dominant factor in the later stages of transfer. The effects of a current waveform on the characteristics of the metal transfer also are simulated.
37 citations
TL;DR: In this article, the authors investigated the gas metal arc welding (GMAW) process of high strength hot rolled dual phase sheet steel and discussed the modelling techniques, and the thermocycles during welding were measured experimentally and simulated with the software tool SimWeld.
37 citations
TL;DR: In this article, the MIG welding and laser-MIG hybrid welding methods are compared to get the more appropriate method to overcome the poor weldability of invar36 alloy. And the analysis of the experimental and simulated results, it has been proved that the Gauss and cone combined heat source model can characterize the laser-mig hybrid welding heat source well.
Abstract: The invar36 alloy is suitable to produce mold of composite materials structure because it has similar thermal expansion coefficient with composite materials. In the present paper, the MIG welding and laser-MIG hybrid welding methods are compared to get the more appropriate method to overcome the poor weldability of invar36 alloy. According to the analysis of the experimental and simulated results, it has been proved that the Gauss and cone combined heat source model can characterize the laser-MIG hybrid welding heat source well. The total welding time of MIG welding is 8 times that of hybrid laser-MIG welding. The welding material consumption of MIG welding is about 4 times that of hybrid laser-MIG welding. The stress and deformation simulation indicate that the peak value of deformation during MIG welding is 3 times larger than that of hybrid laser-MIG welding.
37 citations
01 Jan 1988
TL;DR: In this paper, the effects of various operating parameters on penetration depth were investigated in laser + TIG and laser + MIG welding of steel plate, and the effect of welding speed, distance between TIG electrode and laser beam, focal position of laser and TIG welding current were determined.
Abstract: Effects of various operating parameters on penetration depth were investigated in laser +TIG and laser +MIG welding of steel plate. In laser +TIG welding (of C-Mn-Nb-V steel), DCEN TIG welding at 100-300A was closely followed by laser welding with 1-5kW beam power. Effects of welding speed, distance between TIG electrode and laser beam, focal position of laser and TIG welding current were determined. In laser +MIG welding (of C-Mn-Ni-Mo steel), DCEP helium-MIG welding at 400A was followed by laser welding at up to 5kW. Effects of arc-beam distance, focal position, joint preparation and laser beam power were determined.
37 citations