Topic
Arc welding
About: Arc welding is a research topic. Over the lifetime, 25393 publications have been published within this topic receiving 168182 citations.
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TL;DR: In this paper, the effect of different surface conditions of steel (viz, galvanized, galvanealed and uncoated) and gap between the sheets on braze joint formation have been investigated.
49 citations
Patent•
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19 Jun 1935
TL;DR: In this article, a simple, efficient construction for indicating to the welding operator by visual means attached to an arc welding shield the length of the welding arc was proposed. But it was not used in this application.
Abstract: This invention-relates to an arc welding shield. The object of the invention is to provide a simple, efficient construction for indicating to the welding operator by visual means attached to the shield the length of the welding arc. Other objects will appear hereinafter. This application...
49 citations
TL;DR: In this article, the results of a collaborative research project on laser beam weldability of carbon steels of high sheet thickness are presented, which includes single and multiple pass welding of 16 mm and 20 mm thick plates, as well as the investigation of acceptable tolerances i.e. gap bridgeability and edge misalignment.
Abstract: The results of a collaborative research project on laser beam weldability of carbon steels of high sheet thickness are presented. That includes single and multiple pass welding of 16 mm and 20 mm thick plates, as well as the investigation of acceptable tolerances i.e. gap bridgeability and edge misalignment. For the welding experiments fibre lasers with 8 kW, 20 kW laser power and different GMAW-techniques were used in various applications. With the 20 kW fibre laser 16 mm plates could be welded with a single pass, 20 mm required a seam preparation or alternatively preheating of the material. For multi pass welding with 8 kW laser power a joint preparation with a single V-butt joint with a broad root face (Y-groove) was applied. The root pass was always welded with a hybrid process, the filler passes with a hybrid process as well as a GMAW process which produced the best results.
49 citations
TL;DR: In this paper, the effect of microplasma arc welding (MPAW) process parameters on grain growth and porosity distribution of thin sheet Ti6Al4V alloy weldment has been examined.
Abstract: In the present investigation, the effect of microplasma arc welding (MPAW) process parameters on grain growth and porosity distribution of thin sheet Ti6Al4V alloy weldment has been examined. The MPAW procedure was performed at different current, welding speed, and flow rates of shielding and plasma gas. Metallographic characterization was carried out by light microscopy and scanning electron microscopy (SEM). The results have shown that beyond a threshold energy, burn of the metal in Ti6Al4V thin sheet alloy can occur. This case should be considered for any selection of welding process parameters. Furthermore, in MPAW there are a number of threshold parameters that can control weldment size. Metallographic characterization has shown that coarse primary beta grains exist in the fusion zone. This is due to the fact that these grains have nucleated epitaxially upon coarsened beta grains in the near heat affected zone (NHAZ) and grown competitively into the molten weld pool. Evaluation of grain size...
49 citations
Patent•
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27 Dec 1986
TL;DR: In this article, an induction coil is arranged at the generating part of an arc A and so as to coincide a welding electrode 1 with the center shaft of the induction coil 2 approximately, the welding electrode is melted by this arc heating and the molten metal ring 4 centering around the arc A is caused on the surface of the welding body 3.
Abstract: PURPOSE:To obtain a good quality welding without the fall of a welding body by performing a welding from the lower part of the welding body by providing an induction coil close to the arc generation and by passing an alternating current thereto. CONSTITUTION:An induction coil 2 is arranged at the generating part of an arc A and so as to coincide a welding electrode 1 with the center shaft of the induction coil 2 approximately. The arc A is generated between the welding electrode 1 and induction coil 2 in electrifying the welding electrode 1. The welding electrode 1 is melted by this arc heating and the molten metal ring 4 centering around the arc A is caused on the surface of the welding body 3. An eddy current is generated on the molten metal ring 4 by passing an alternating current to the induction coil 2, a resiliency is generated between this eddy current and the magnetic field caused by the induction coil 2 and the welding of good quality can be performed with the molten metal ring 4 being pushed to the welding body 3.
49 citations