Journal ArticleDOI
Investigations on weld metal chemistry and mechanical behaviour of bimetallic welds using CaO–CaF2–SiO2–Ni based electrode coatings
Deepak Bhandari,Rahul Chhibber,Navneet Arora,Rajeev Mehta +3 more
- Vol. 233, Iss: 4, pp 563-579
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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...read more
Citations
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Investigating the effect of electrode preheating in novel water-cooled advanced submerged arc welding process:
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...
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
Physicochemical and thermo physical characterization of CaO–CaF2–SiO2 and CaO–TiO2–SiO2 based electrode coating for offshore welds
Waris Nawaz Khan,Rahul Chhibber +1 more
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.
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
Prediction of submerged arc weld‐metal composition from flux ingredients with the help of statistical design of mixture experiment
TL;DR: In this paper, a prediction model has been developed for submerged arc weld-metal chemical composition in terms of flux ingredients with the help of statistical experiments for mixture (extreme vertices design).
Journal Article
ANSI/AWS A5.1-91 E6013 rutile electrodes: The effect of calcite
TL;DR: Hazardous waste containers are sealed tight by a welding procedure developed and qualified at Savannah River Technology Center as discussed by the authors, which is a state-of-the-art welding procedure.
Journal Article
Control of diffusible weld metal hydrogen through flux chemistry modification : The influence of fluoride and calcite flux additions on the hydrogen content of shielded metal arc welds was examined
TL;DR: In this article, the feasibility of using flux modification to reduce the as-deposited hydrogen content of basic-type shielded metal arc welds was examined, and the effect of flux additions on the weld mechanical properties and the electrode operating characteristics was not evaluated during the course of this investigation.
Journal ArticleDOI
Effect of Electrode Coatings on Diffusible Hydrogen Content, Hardness and Microstructures of the Ferritic Heat Affected Zones in Bimetallic Welds
TL;DR: In this paper, the authors highlight the general issues and challenges for the systematic and scientific development of welding electrode coatings for bimetallic welds, and propose a method to solve them.