在自行研制的 Al 合金流变性能测试装置上研究了 Mn 对 Al-5wt-%Cu 合金固液共存区流变行为的影响。实验结果表明,Mn 能不同程度地提高合金在固液共存区的剪切模量、粘度系数和屈服强度,并能使开尔芬体的延迟时间η_2/G_2最小值所对应的温度和开尔芬体温度右移,使开尔芬体有效温度区间扩大。 The effect of Mn on the rheological behavior of Al-5wt-% Cu alloy in solid-liquid coexistence zone was investigated on a self-developed Al alloy rheometer. The experimental results show that Mn can improve the shear modulus, viscosity coefficient and yield strength of the alloy in the solid-liquid coexisting area to some extent, and can make the temperature corresponding to the minimum value of η 2 / G 2 of Kelphen, Fen body right temperature shift, so Kelp effective body temperature range expanded.