Open AccessJournal Article
Effect of electrochemical reactions on submerged arc weld metal compositions
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In this paper, the relative influence of electrochemical and thermochemical reactions on the weld metal chemistry in a direct current submerged arc welding process was investigated, and chemical analyses were carried out on the melted electrode tips, the detached droplets and the welding metal for both electrode-positive (reverse) and electrode-negative (straight) polarity where the welding wire is cathodic.Abstract:
The purpose of this work is to investigate the relative influence of electrochemical and thermochemical reactions on the weld metal chemistry in a direct current submerged arc welding process. Chemical analyses were carried out on the melted electrode tips, the detached droplets and the weld metal for both electrode-positive (reverse) polarity where the welding wire is anodic and electrode-negative (straight) polarity where the welding wire is cathodicread more
Citations
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Combined effect of flux and welding parameters on chemical composition and mechanical properties of submerged arc weld metal
TL;DR: In this article, the combined effect of flux mixture and welding parameters on submerged arc weld metal chemical composition and mechanical properties was investigated and it was shown that the two factor interaction effect is higher than the individual effect of mixture related variables.
Journal ArticleDOI
Understanding grain refinement in aluminium welding
TL;DR: In this article, grain refinement was achieved in aluminium welds through additions of grain refiner to the weld metal, which led to a decrease of the welding metal mean grain size.
Journal Article
Prediction of element transfer in submerged arc welding
TL;DR: In this paper, the transfer of elements across the molten weld pool has been predicted by developing quadratic models in terms of flux ingredients with the application of statistical experiments for mixture design, and the results show that some of the individual flux ingredients and their binary mixtures have a predominant effect on weld metal transfer of oxygen, manganese, silicon, and carbon contents.
Journal ArticleDOI
Investigating the physicochemical and thermophysical properties of submerged arc welding fluxes designed using TiO2-SiO2-MgO and SiO2-MgO-Al2O3 flux systems for linepipe steels
Lochan Sharma,Rahul Chhibber +1 more
TL;DR: In this paper, physicochemical and thermophysical properties of TiO2-SiO 2-MgO and SiO2 MgO-Al2O3 based rutile acidic SAW fluxes were studied.
Journal ArticleDOI
Design and development of submerged arc welding fluxes using TiO2-SiO2-CaO and SiO2-CaO-Al2O3 flux system:
Lochan Sharma,Rahul Chhibber +1 more
TL;DR: Submerged arc welding is widely used in pipeline manufacturing due to higher efficiency as compared to the other welding processes in this article, TiO2SiO2-CaO and SiO2CaO-Al2O3-based submerge
References
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Journal ArticleDOI
Slag-metal equilibrium during submerged arc welding
C. S. Chai,Thomas W. Eagar +1 more
TL;DR: In this article, a thermodynamic model of the equilibria existing between the slag and the weld metal during submerged arc welding is presented, which applies only to fused neutral fluxes containing less than 20 pct CaF2, however some results indicate that the model may be useful in more general cases as well.
Journal ArticleDOI
Chemical reactions during submerged arc welding with FeO-MnO-SiO2 fluxes
TL;DR: In this paper, the compositional changes of fluxes and weld metal during submerged arc flux welding with a series of synthetic MnO-FeO-SiO2 model fluxes containing 40 wt pct SiO2 and different ratios of MnO to FeO. Mechanisms for transfer of Mn, O, Si, C, S, and P are discussed in terms of the thermodynamic driving forces and kinetic factors such as diffusion, nucleation, and segregation.
Electrochemical effects on weld pool chemistry in submerged arc and dc electroslag welding
M. Blander,D.L. Olson +1 more
TL;DR: In this article, the authors proposed a mechanism for dc-welding in which the electrodeposition reaction at the weld wire-slag interface leads to a relatively high Po/sub 2/ which leads to the formation of an oxide nO/sup 2 -/ + M(metal) where n is related to the valence of M in the oxide.
Factors Controlling Weld Metal Chemistry.
O Grong,N Christensen +1 more
TL;DR: In this paper, the kind and extent of chemical interaction in the four main steps of the GMA process are elucidated, i.e., electrode tip, arc column, hot part of weld pool, and cooling part of welding pool.
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