【摘要】 通过结合不同截面尺寸的杆和法兰设计了受不同收缩阻碍的镁稀土铸件，并研究了在低压和重力铸造条件下Mg-9Gd-3Y-0.5Zr合金铸件的受阻收缩行为。使用三维扫描仪进行精确的尺寸测量，并利用所得数据从多个角度分析受阻收缩率的变化趋势。探讨多种评估因素，包括法兰与杆面积之比、铸件与包络体积之比，以及几何特征与铸造模数的组合对铸件收缩受阻程度的评估效果。通过回归分析，确定了基于几何特征与铸造模数的最优评估参数，并据此建立了自由收缩率与受阻收缩率的关联方程。更多还原

【Abstract】 Magnesium rare earth alloy castings with varying degrees of contraction constraints were designed by combining rods and flanges with different cross-sectional sizes, and the constrained contraction behavior of Mg-9Gd-3Y-0.5Zr alloy castings was investigated under low-pressure and gravity casting conditions. Precise dimensional measurements were performed using a 3D scanner, and the data obtained were used to analyze trends in constrained contraction coefficient(CC) values from multiple perspectives. Several evaluation factors, including the ratios of flange to rod area and casting to envelope volume, as well as the combination of geometric characteristics and casting modulus, were explored for their effectiveness in assessing the degree of constraint on the castings. The geometric characteristics and casting modulus were integrated through regression analysis to determine optimized evaluation parameters, based on which an equation for correlating free and constrained CC values was established.更多还原