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<p>In the field of liquid metal forming, solidification shrinkage is inevitable, so the quantitative prediction of shrinkage defects is very urgent. The author’s team has done relevant modeling research on one-dimensional feeding model in the early stage, but it is no longer applicable to the feeding problem of plate And disc parts. Therefore, in this study, aiming at the disc parts with small height-diameter ratio, the prediction model of rheological feeding radius for squeeze casting of disc parts was established according to the condition for stopping rheological feeding of alloy melt, which is based on the pressure attenuation law And the rheological resistance increasing law of the alloy melt along the radius direction. The distribution of shrinkage cavity and porosity was simulated by finite element analysis tool, so as to verify the reliability of the proposed rheological feeding model. The simulation results are in good agreement with the prediction model results under various height-diameter ratios, pressures and pouring temperatures. In order to further verify the reliability of the model, the feeding radius of the disc sample was detected by sectioning along its central axis when the feeding pressure was 20&#xa0;MPa, 50&#xa0;MPa, 100&#xa0;MPa And 150&#xa0;MPa, respectively. The results show that the theoretical calculation values are in good agreement with the experimental results, and the Maximum relative deviation is only 11.8%.</p>

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Prediction model of rheological feeding radius for squeeze casting of disk parts

  • 期刊论文

  • 发表日期：

    2025年9月13日

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  • Ying Wang,
  • Xianglong Liu,
  • Weitao Jia

摘要

In the field of liquid metal forming, solidification shrinkage is inevitable, so the quantitative prediction of shrinkage defects is very urgent. The author’s team has done relevant modeling research on one-dimensional feeding model in the early stage, but it is no longer applicable to the feeding problem of plate And disc parts. Therefore, in this study, aiming at the disc parts with small height-diameter ratio, the prediction model of rheological feeding radius for squeeze casting of disc parts was established according to the condition for stopping rheological feeding of alloy melt, which is based on the pressure attenuation law And the rheological resistance increasing law of the alloy melt along the radius direction. The distribution of shrinkage cavity and porosity was simulated by finite element analysis tool, so as to verify the reliability of the proposed rheological feeding model. The simulation results are in good agreement with the prediction model results under various height-diameter ratios, pressures and pouring temperatures. In order to further verify the reliability of the model, the feeding radius of the disc sample was detected by sectioning along its central axis when the feeding pressure was 20 MPa, 50 MPa, 100 MPa And 150 MPa, respectively. The results show that the theoretical calculation values are in good agreement with the experimental results, and the Maximum relative deviation is only 11.8%.