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Journal ArticleDOI

Investigations on weld metal chemistry and mechanical behaviour of bimetallic welds using CaO–CaF2–SiO2–Ni based electrode coatings

TL;DR: In this paper, an attempt has been made to design and develop an intermediate electrode based on CaO-CaF2-SiO2 ternary phase diagram system and nickel as an additional electrode coating ingred...
Abstract: The bimetallic welds between ferritic low alloy steels and austenitic stainless steels are widely used in the heat piping transport systems of nuclear power plants for connecting the heavy section low alloy steel components with those of high temperature stainless steel pipes. The operating experience of major nuclear power plant components has recently shown that bimetallic joints can jeopardize the plant availability and safety because of increased incidences of failure. In shielded metal arc welding process, the occurrence and severity of weld defects mainly depend upon the type of electrode filler wire and the electrode coating ingredients used. The use of nickel based filler metals is no longer considered as the final solution for unexpected failures of bimetallic welds due to incidences of hot cracking. In the present paper, an attempt has been made to design and develop an intermediate electrode based on CaO–CaF2–SiO2 ternary phase diagram system and nickel as an additional electrode coating ingred...
Citations
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01 Jan 1987

991 citations

Journal ArticleDOI
01 Oct 2019
TL;DR: In this article, a novel developed water-cooled advanced submerged arc welding (WASAW) process has been designed and established, which can be utilized for higher preheating cur...
Abstract: In this paper, a novel developed water-cooled advanced submerged arc welding (WASAW) process has been designed and established. The developed WASAW process can be utilized for higher preheating cur...

31 citations

Journal ArticleDOI
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.

27 citations

Journal ArticleDOI
TL;DR: In this paper, the physicochemical and thermo-physical properties of CaO-CaF2-SiO2 and CaO−TiO2-O2 based electrode coating for welding offshore structures were investigated.

25 citations

Journal ArticleDOI
01 Aug 2019
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
Abstract: Submerged arc welding is widely used in pipeline manufacturing due to higher efficiency as compared to the other welding processes In present study, TiO2-SiO2-CaO and SiO2-CaO-Al2O3–based submerge

21 citations

References
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Journal ArticleDOI
TL;DR: In this article, a trimetallic joint involving modified 9Cr-1Mo steel and 316LN austenitic stainless steel as the base materials and Alloy 800 as the intermediate piece was investigated.

150 citations

Journal ArticleDOI
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.

104 citations


"Investigations on weld metal chemis..." refers methods in this paper

  • ...Kanjilal et al.11,12 studied the individual as well as combined effect of flux ingredients and welding parameters on various weld responses of submerged arc welds with the help of statistical design of experiment....

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  • ...Kanjilal et al.(11,12) studied the individual as well as combined effect of flux ingredients and welding parameters on various weld responses of submerged arc welds with the help of statistical design of experiment....

    [...]

Journal ArticleDOI
TL;DR: In this paper, a critical review of current thermodynamic theories of slag-metal reactions is presented, and a series of preliminary experiments indicates that the previously proposed droplet theory is incorrect and the primary reactions controlling Mn, Si, and Cr content occur in the weld pool.
Abstract: A critical review of current thermodynamic theories of slag-metal reactions is presented. A series of preliminary experiments indicates that the previously proposed droplet theory is incorrect and the primary reactions controlling Mn, Si, and Cr content occur in the weld pool. In addition, these experiments show that the net transfer of oxygen is independent of the transfer of Mn and Si.

67 citations

Journal ArticleDOI
U. Mitra1, T. W. Eagar
TL;DR: In this article, a kinetic model is developed to describe the transfer of alloying elements between the slag and the metal during flux-shielded welding, which accounts for changes in alloy recovery based on the geometry of the resulting weld bead.
Abstract: A kinetic model is developed to describe the transfer of alloying elements between the slag and the metal during flux-shielded welding. The model accounts for changes in alloy recovery based on the geometry of the resulting weld bead. It also distinguishes compositional differences between single-pass and multiple-pass weld beads. It is further shown that the final weld metal oxygen content is directly related to the weld solidification time as well as the type of flux used.

65 citations

Journal ArticleDOI
TL;DR: In this article, the influence of submerged arc welding parameters and flux basicity index on the weld chemistry and transfer of elements manganese, silicon, carbon and sulphur has been investigated, five fluxes and different values of the welding parameters being used for study.

59 citations


"Investigations on weld metal chemis..." refers methods in this paper

  • ...Pandey et al.10 observed the effect of various welding process parameters on weld chemistry for similar welds using SAW process....

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  • ...Pandey et al.(10) observed the effect of various welding process parameters on weld chemistry for similar welds using SAW process....

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