开发了一种挤压铸造过程直接测量铸件内部温度的方法,该方法能够对直接挤压铸造过程中铸件内部的温度变化进行连续多模次测量。采用该方法,对A356铝合金挤压铸造过程中铸件内部温度变化进行了测量,获得了不同挤压压力下阶梯试件不同部位的冷却曲线。采用光学显微镜对测温部位附近的凝固组织进行了观察,并测量了晶粒尺寸。通过将凝固组织与冷却曲线对照分析,研究了压力对凝固组织的影响。 A method was developed for the direct measurement of the temperature inside the casting by the squeeze casting process. This method enables the continuous multi-mode measurement of the temperature change inside the casting during direct extrusion casting. Using this method, the temperature variation inside the casting of A356 aluminum alloy during the extrusion casting process was measured, and the cooling curves of the different parts of the ladder specimen under different extrusion pressures were obtained. An optical microscope was used to observe the solidified structure near the temperature measurement site and the grain size was measured. By comparing the solidification microstructure with the cooling curve, the effect of pressure on the solidified structure was investigated.