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Analysis of thermal cycles and phase transformations during multi-pass ARC weld surfacing of steel casts taking into account heat of the weld

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In this work, a model of phase transformations during multipass weld surfaced steel casts is presented. In the temperature field calculation algorithm, the influence of the heat of overlaying beads and a self-cooling of previously overlayed beads have been taken into account. The fusion area, full and part transformation zones, by solidus, A1 and A3 and A A1 temperatures has been determined, respectively. The temperatures of the beginning and the end of the phase changes during cooling were determined on the basis of the time-temperature-transformation welding diagram. In the phase change kinetic description, the JMAK law and KM formula were used. Theoretical considerations are illustrated by example of volume share calculations of particular structural components during the weld surfaced 230-450 W steel cast. The results of computation in the graphical forms are presented: welding thermal cycle diagrams and structural share change histories at selected points, as well as temperature and the phase share distributions in cross section.
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Bibliogr. 32 poz., rys.
  • Institute of Mechanical Technology, Czestochowa University of Technology Czestochowa, Poland
  • Institute of Mechanical Technology, Czestochowa University of Technology Czestochowa, Poland
  • Institute of Mechanical Technology, Czestochowa University of Technology Czestochowa, Poland
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Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).
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