依据压力可以改变某些金属的熔点的原理，设计了高压大体积凝固工艺，对液态金属施加高压，提高熔点，其凝固过程不依赖于散热速度，而只取决于加压速度，从而实现大体积的近快速凝固．对高压凝固过程的相关参数进行了数值模拟，并对过共晶ＡｌＳｉ合金的高压凝固组织进行了初步探讨． Based on the principle that the pressure can change the melting point of some metals, a high-pressure, large-volume solidification process is designed to apply a high pressure to the liquid metal to increase the melting point. The solidification process does not depend on the cooling rate but only depends on the pressurization rate so as to achieve a large volume Near rapid solidification. The relevant parameters of high pressure solidification process were numerically simulated and the high pressure solidification structure of hypereutectic AlSi alloy was discussed.