Methodology for evaluation of slag crust separation during surfacing of low- and medium-carbon steels

Authors

DOI:

https://doi.org/10.20535/2521-1943.2023.7.1.277718

Keywords:

slag crust, electric arc surfacing, fluxes, evaluation method of high-temperature separation of slag crust, slag system, spinels

Abstract

The relevance of using slag crust separation methods, which are characterized by easy separation and are based on thermo-deformation processes in the sample, is shown in the development of new welding materials. The developed method of assessing slag separation based on the theoretical calculation of thermo-deformation processes in the base metal has passed the stages of experimental research The experimental approbation of the proposed methodology for assessing the separation of the slag coating from the surface of welded joints under experimental fluxes based on the TiO2-MnO-SiO2–MgO–CaO-FeO-Al2O3 slag system was carried out for different welding regimes. The evaluation criterion for the high-temperature separation of the slag coating takes into account: the ratio of the geometric parameters of the test sample, the amount of heat input during the surfacing process, and the factor of the presence of spinel-forming components at the slag-metal interface. The selected parameters for evaluating the separation of the slag crust in points, where the guaranteed separation of the slag coating is counted for the arbitrary separation of the slag during its destruction or the arbitrary separation of the slag by a monolithic layer. The practical value of the proposed method lies in the possibility of quantitative assessment of the probability of high-temperature separation of the slag coating for a wide range of fluxes for surfacing.

The results of the conducted experiments show the efficiency of the developed methodology for evaluating the high-temperature separation of the slag coating from the surface of the weld metal.

References

  1. S.B. Yakobashvili, Surface properties of welding fluxes and slags, Kyiv: Tehnika, 1970.
  2. A. Shono, D.S. Kasov and V.M. Karpenko, “Evaluation of slag systems of flux-cored wire according to separability of slag crust”, Avtomaticheskaya svarka, vol. 3, pp. 22–24, 1976.
  3. V.N. Kopersak, A.M. Slivinskij and V.T. Kotik, “Method for assessing the slag coating”, UA Patent 66003A, 15.04.2004.
  4. V.N. Kopersak, A.M. Slivinskij and V.T. Kotik, “Method for assessing the slag coating”, UA Patent 66004A, 15.04.2004.
  5. A.G. Grin and A.A. Boguckij, “Method of separation of the slag crust”, Avtomaticheskaya svarka, vol. 3, pp. 58–59, 1996.
  6. V.E. Sokolskij, A.S. Roik and V.P. Kazimirov, “Influence of zirconium dioxide on the properties of slag during arc surfacing with low-alloyed flux-cored wire AN-348A”, Avtomatichekakaya svarka, vol. 37, pp. 24–29, 2008.
  7. S.I. Moraveckij, “Separability of the slag crust in arc welding. Part 1: Mechanism of chemical adhesion of slag to weld metal”,
  8. Avtomaticheskaya svarka, vol. 1, pp. 32–36, 2011.
  9. S.I. Moraveckij, “Separability of the slag crust in arc welding. Part 2: The nature of the influence of the main factors on the separability of the slag crust”, Avtomaticheskaya svarka, vol. 2, pp. 22–26, 2011.
  10. Lochan Sharma, Rahul Chhibber, “Study of weld bead chemical, microhardness & microstructural analysis using submerged arc welding fluxes for linepipe steel applications”, Ceramics International, vol. 46, 2020. DOI: 10.1016/j.ceramint.2020.06.250
  11. Aman Singh, R.P. Singh, “A review of effect of welding parameters on the mechanical properties of weld in submerged arc welding process”, Materials Today: Proceedings, vol. 26, part 2, pp, 1714–1717, 2020. DOI: 10.1016/j.matpr.2020.02.361
  12. L.A. Zhdanov et al., “Physico-chemical features of the separation of slag crust from the surface of the weld metal and the methodo- logical basis of evaluation methods”, Tehnologicheskie sistemy, vol. 1, pp. 109–115, 2010.
  13. L. Zhdanov et al., ‟Method of evaluation of slag crust separation”, UA Patent 40496, 04.2009.
  14. L.A. Zhdanov, V.L. Kovalenko, N.M. Strelenko, and E.P. Chvertkon, ‟Peculiarities of thermal dissociation of oxides during submerged arc welding”, Soldagem & Inspecao, vol. 18, pp. 314–321, 2013.
  15. V.L. Kovalenko, R.V. Mastenko, N.M. Strelenko and K.O. Zvorikin. “Improvement of the criterion for assessing the stability of the existence of an arc discharge on direct current” Tehnologicheskie sistemy. vol. 80, pp. 56–58, 2017.

Downloads

Published

2023-05-02

How to Cite

Strelenko, N., Kovalenko, V., & Mastenko, R. (2023). Methodology for evaluation of slag crust separation during surfacing of low- and medium-carbon steels. Mechanics and Advanced Technologies, 7(1), 75–83. https://doi.org/10.20535/2521-1943.2023.7.1.277718

Issue

Vol. 7 No. 1 (2023)

Section

Up-to-date machines and the technologies of mechanical engineering

License

Copyright (c) 2023 Наталія Стреленко, Владислав Коваленко, Роман Мастенко

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

The ownership of copyright remains with the Authors.
 
Authors may use their own material in other publications provided that the Journal is acknowledged as the original place of publication and National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” as the Publisher.

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under CC BY 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work