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<p>This study evaluates the influence of annular welds (undercuts) on the inner and outer surfaces of ceramic and metal casting molds on reducing their stress-strain state during the crystallization and cooling of a&#xa0;steel casting. Key results from a&#xa0;numerical simulation of parameters governing mold resistance to crack formation, specifically the magnitude of normal stresses on the inner (facing) and outer surfaces during the cooling stage of the solidifying casting are presented. The presence of annular undercuts on the inner surface of a&#xa0;spherical metal mold significantly reduces the level of thermal stress σ<sub>22</sub> that develops during the cooling stage of solidification, keeping it well below the maximum allowable stress level. In a&#xa0;ceramic shell mold featuring both cylindrical and spherical segments, substantial σ<sub>22</sub> stresses develop during casting cooling. The stresses are negative (compressive) in the inner facing layer and positive (tensile) in the outer layer at the interface with the support filler.</p>

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Stress-strain analysis of ceramic and metallic casting molds with annular welds

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • A. I. Evstigneev,
  • D. V. Chernyshova,
  • Y. B. Koloshenko,
  • V. I. Odinokov,
  • E. A. Dmitriev,
  • D. A. Potyanikhin

摘要

This study evaluates the influence of annular welds (undercuts) on the inner and outer surfaces of ceramic and metal casting molds on reducing their stress-strain state during the crystallization and cooling of a steel casting. Key results from a numerical simulation of parameters governing mold resistance to crack formation, specifically the magnitude of normal stresses on the inner (facing) and outer surfaces during the cooling stage of the solidifying casting are presented. The presence of annular undercuts on the inner surface of a spherical metal mold significantly reduces the level of thermal stress σ22 that develops during the cooling stage of solidification, keeping it well below the maximum allowable stress level. In a ceramic shell mold featuring both cylindrical and spherical segments, substantial σ22 stresses develop during casting cooling. The stresses are negative (compressive) in the inner facing layer and positive (tensile) in the outer layer at the interface with the support filler.