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Design Optimization of Pouring basin in the Shape Casting Process

Zohrevand, Milad | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48362 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Davami, Parviz; Tavakoli, Rohollah
  7. Abstract:
  8. The pouring basin is a main part in the gating system. The formation of a vortical flow is a big problem occurs during the discharge of melt from the pouring basin. The vortex formation can enter the floating slag and inclusion into the mold. In the case that the vortex is more stronger, a fully air core to the sprue forms and leads to entraining of the air to the mold. These phenomena can decrease the casting quality significantly. Therefore preventing of the vortex is necessary to produce a sound cast. In this study the mechanism of vortex formation is investigated and several solutions are presented to avoid its detrimental effects. For this purpose discharge of a tank is simulated numerically using the FLUENT software. The VOF multiphase and renormalization-group (RNG) k – ε models and PISO algorithm are used in the simulations. Comparison shows that the results for the water and molten steel are similar closely in this case. The results revealed that the existence of a tangential component in the velocity field is the most important factor that contributes in the formation of spiral flow. Moreover this research discloses that the detrimental effects of vortex can be neutralized by simple changes in the pouring basin geometry and design
  9. Keywords:
  10. Simulation ; Casting ; Vortex Flow (Eddy Current) ; Critical Hight ; Gating System ; Pouring Basin ; Air Entrainment

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