对镁合金ＡＥ４２在高压力下充型与凝固过程的测试结果表明，ＡＥ４２在循环回转式型腔中的流 动能力比铝合金ＡＬＳＩ９ＣＵ３约低５０％；数值模拟分析结果表明，较低的结晶潜热是导致ＡＥ４２流动 能力低的主要原因．据此，在压铸工艺设计过程中，钱合金ＡＥ４２应当选择比铝合金ＡＬＳＩ９ＣＵ３更高 的充型速度，尽量控制金属从压室、浇道到型腔的热量损失． The test results of the filling and solidification process of AE42 magnesium alloy under high pressure show that the flowability of AE42 is about 50% lower than that of ALSI9CU3. The numerical simulation results show that the lower latent heat of crystallization The main reason for the low flowability of the AE42. Accordingly, during the process of die-casting design, AE42 gold alloy should choose a higher filling speed than the aluminum alloy ALSI9CU3, try to control the metal from the pressure chamber, runner to the cavity of the heat loss.