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Investigation on slags of CaO-CaF2-SiO2- Al2O3 based electrode coatings developed for power plant welds
S. Mahajan,
Published in Elsevier Ltd
2020
Volume: 46
   
Issue: 7
Pages: 8774 - 8786
Abstract
In this article physicochemical and thermo-physical properties of slags obtained from CaO–CaF2–SiO2–Al2O3 based shielded metal arc welding electrodes were investigated. The extreme vertices design methodology was used to prepare twenty-one coating compositions. Multi-pass beads were applied on the P22 low alloy steel plate. The welding slag for each weld bead was collected. Experimentation's on welding slags have been performed to estimate the weight loss, density, specific heat, enthalpy, thermal conductivity and diffusivity. X-Ray Diffraction (XRD) and Fourier transformation infrared spectrometry (FTIR) was performed to analyses the different phases present in slag. Thermogravimetric Analyzer (TGA) and hot disc apparatus have been used to characterize the slag's thermal properties. The regression analysis has been used to study the effect of coating constituents on the slag properties. The obtained output of properties has been further optimized using multi-response optimization. © 2019 Elsevier Ltd and Techna Group S.r.l.
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Figures & Tables (11)
  • Figure-0
    Table 2: Chemical Composition of P22 base metal and B90-S ... Expand
  • Figure-1
    Figure 1: Schematic of present investigation 70
  • Figure-2
    Figure 3: Design space diagram 106
  • Figure-3
    Table 3: Design Matrix of electrode coatings 103
  • Figure-4
    Figure 5: Collected and crushed welding slag from weld deposit ... Expand
  • Figure-5
    Figure 6: Heat flow curve of slag for electrode coatings ... Expand
  • Figure-6
    Table 5: Weight Loss in Thermo Gravimetric Analysis 164
  • Figure-7
    Figure 7: Weight loss in welding slags of electrode coatings ... Expand
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About the journal
JournalData powered by SciSpaceCeramics International
PublisherData powered by SciSpaceElsevier Ltd
ISSN02728842
Open AccessNo