The hot tearing susceptibilities of an Al–Si based alloy were investigated for hot tearing characteristics. The experimental studies were conducted using a newly developed enhanced constrained rod casting method that enables real-time measurements of the contraction load developed in the casting and the temperature variations during solidification as a function of time. A304 and A380 casting alloys were selected to study hot tearing characteristics at pouring temperatures of 700 °C, 750 °C, and 800 °C. The study showed that hot tearing was not observed in measurement rod of A304 and A380 casting alloys. However, hot tearing was observed in the constrained rods A and B of A380 casting alloy at 750 °C. A304 alloy showed higher resistance to hot tearing at a casting temperature below 750 °C.

研究了Al-Si基合金的热撕裂敏感性。实验研究是使用新开发的增强型约束杆铸造方法进行的，该方法能够实时测量铸件中产生的收缩载荷以及凝固过程中随时间变化的温度变化。选择A304和A380铸造合金来研究在700°C，750°C和800°C的浇注温度下的热撕裂特性。研究表明，在A304和A380铸造合金的测量棒中未观察到热撕裂。但是，在750°C下，A380铸造合金的受约束棒A和B观察到热撕裂。在低于750°C的铸造温度下，A304合金具有较高的抗热裂性。