Topic
Shielded metal arc welding
About: Shielded metal arc welding is a research topic. Over the lifetime, 4462 publications have been published within this topic receiving 40560 citations. The topic is also known as: manual metal arc welding & flux shielded arc welding.
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01 Jan 2003
TL;DR: In this article, the authors present a real-time measurement of welding temperature field using a calorimetric imaging method and an automatic seam-tracking machine with an arc sensor.
Abstract: Part 1 Dynamic behaviour of arc welding: Theoretical analysis Dynamic characteristics of power sources Experimental study. Part 2 Welding arc control: Control method QH-ARC 101 Control method QH-ARC 102 and 103 Arc control CO2 welding and AC MIG welding. Part 3 Arc sensors and seam tracking: Sensors for weld-seam tracking Mathematical models of arc sensors Processing of arc sensor signals An automatic seam-tracking machine with an arc sensor. Part 4 Real time measurement of welding temperature- field: Principles of the calorimetric imaging method Study of the calorimetric imaging method Design of a calorimetric imaging apparatus Practical measurement and application. Part 5 Automatic path programming of robot: Vision systems and automatic path programming.
35 citations
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TL;DR: In this paper, a comparative analysis between the mechanical properties of high strength steel weld metals obtained by shielded metal arc and gas metal arc (GMAW) welding processes was performed with preheating of 200°C.
Abstract: The development of consumables for welding of high strength steels represents a continuous challenge taking into account the great variety of alloy systems. In this regard, there are many applications, such as offshore structures, where the welding is still preferably done by the SMAW process. In order to evaluate the properties of weld metals obtained by other processes with higher productivity, the present work presents a comparative analysis between the mechanical properties of high strength steel weld metals obtained by shielded metal arc (SMAW) and gas metal arc (GMAW) welding processes. Multipass welding by SMAW and GMAW processes was performed with preheating of 200 °C, in 750 × 150 × 19 mm plates. After welding, a post weld heat treatment (PWHT) at 600 °C for 1 h was performed and this condition was compared to the as welded one. Mechanical tests and metallographic examination by optical microscopy (OM), scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD) were performed for mechanical and microstructural characterization. Thermodynamic calculations were also performed by using Thermo-Calc software, in order to evaluate the occurrence of carbides as a consequence of the PWHT. Although presenting impact toughness behavior slightly different due to the chemical composition and carbide precipitates, as predicted by computational simulation, both processes showed a good relationship between mechanical strength and impact toughness for all analyzed conditions, even after PWHT. Based on this scenario, it can be inferred that GMAW process can be applied as an interesting alternative for welding of high strength steels, once this process promotes a significant improvement in productivity with good quality.
34 citations
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TL;DR: In this paper, a slow-strain rate tensile test (SSRT) and low-cycle fatigue test were carried out in sea-water under cathodic polarisation.
34 citations
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TL;DR: In this paper, the effects of gas-tungsten arc (GTA) welding process parameters (like welding current in the range of 100/300 A and welding speed in range of 3.33/13.33mm/s) on energy absorption by the substrate material were examined in terms of process efficiencies and microstructure characteristics.
34 citations
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TL;DR: In this article, the same authors used low energy ion erosion in secondary ion mass spectrometry to analyze welded fume particles, which were collected during the welding process of steel performed with three different techniques: electron beam welding, gas tungsten arc welding, and shielded metal arc welding (SMAW).
34 citations