Investigations on weld metal chemistry and mechanical behaviour of bimetallic welds using CaO–CaF2–SiO2–Ni based electrode coatings
01 Apr 2019-Vol. 233, Iss: 4, pp 563-579
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
More filters
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
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
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
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
More filters
TL;DR: In this article, the basic principles and noteworthy features of dissimilar welding of stainless steel to carbon and low-alloy steels are discussed, as well as their application in the manufacture of thermal and nuclear power plants, chemical plants, etc.
Abstract: The most widely used metal underpinning modern industry is steel (carbon steel). Low-alloy steel designed to increase the strength and heat resistance of basic carbon steel and stainless steel to offer improved corrosion resistance and oxidation resistance are extensively used in the manufacture of thermal and nuclear power plants, chemical plants, etc. An extremely important and unavoidable practical requirement in modern steel construction technology is to be able to perform dissimilar welding of stainless steel to carbon and low-alloy steels (welding of dissimilar metals). This article profiles the basic principles and noteworthy features of dissimilar welding of stainless steel to carbon and low-alloy steels.
17 citations
TL;DR: In this paper, the authors analyzed the viscosity of liquid slag in the form of a thin layer of solidified and molten slag, where the main function is to lubricate the walls of the crystallizer and control the heat transport from the solidifying steel.
Abstract: This paper analysis one of the basic properties of liquid slag which is viscosity. The slag in the mold fills there is between the wall and the ingot mold, where it occurs in the form of a thin layer of solidified and molten slag. The main function is to lubricate the walls of the crystallizer and control of the heat transport from the solidifying steel. The research work carried out by concentric cylinder viscosity for five samples of slag for use in industrial environments. The study was conducted for the temperature range 1200-1550◦C. Then the experimental results were compared with model calculations. The differences between the experimental results and the model calculations are related to the construction of the slag and the assumptions. Measurements under laboratory conditions on the two-phase system: a liquid solution of the dispersed phase ion steel carbon, whereas the calculation model are the liquid-phase, and therefore the viscosity calculated values are lower than the values measured.
8 citations